JP7083585B2 - Manufacturing method and manufacturing plant of fuel for cement kiln - Google Patents

Description

The present invention relates to a method for producing a fuel for cement kiln using waste as a material, and a production plant thereof.

Conventionally, in the manufacturing process of Portland cement, waste plastic is used as fuel in the firing process of calcining the material to obtain clinker. In the firing step, in many cases, the material is preheated at several hundred degrees Celsius by a preheating device and then fired at about 1500 ° C. by a rotary kiln. From the front of the rotary kiln, crushed waste plastic is mixed with pulverized coal, which is the main fuel, and supplied into the rotary kiln for combustion (see, for example, Patent Document 1). By putting waste plastic in front of the kiln of the rotary kiln, the amount of pulverized coal used as the main fuel is reduced and the waste is effectively used.

In the Portland cement manufacturing process, as part of the effective use of waste, waste tires are put into a preheating device, rubber is burned and used as fuel, and steel wire is used as a clinker material.

Japanese Unexamined Patent Publication No. 2007-084434

Waste plastics and waste tires used in the manufacturing process of Portland cement are sorted and collected for each material. The waste plastics and waste tires separated and collected in this way have achieved a recycling rate of more than 90% as fuels and materials for various purposes.

On the other hand, for example, mixed waste generated at construction sites is composed of many substances such as debris, wood, plastic, and metal, and is difficult to reuse because it is contaminated with earth and sand. Disposal is taking place. Effective utilization of mixed waste is required in the situation where most of the waste separated and collected for each material is effectively utilized.

Therefore, an object of the present invention is to provide a method for producing a fuel for cement kiln and a production plant capable of producing a fuel for cement kiln using mixed waste.

In order to solve the above problems, the method for producing a fuel for cement kiln of the present invention includes a coarse crushing step for coarsely crushing mixed waste and a coarse crushing step.
A shaking sorting step of sorting a material to be roughly crushed in the above coarse crushing step into a lightweight material, a fine grain material, and a heavy material by a rocking sorter.
A heavy object crushing step for crushing heavy objects selected in the above swing sorting step, and a heavy object crushing step.
A merging step in which the crushed material crushed in the heavy material crushing step and the fine granules selected in the shaking sorting step merge.
A specific gravity difference sorting step of sorting the crushed matter and fine granules merged in the above merging step into lightweight, fine and heavy matter according to the specific gravity and dimensions.
A sieving step of sieving the lightweight material selected in the above-mentioned specific gravity difference sorting process into a passing substance and a residue with a sieving body.
The first fuel collection step of collecting the residue remaining on the sieve body in the above sieving step as the first fuel, and
It is characterized by including a material collecting step of collecting the passing material that has passed through the sieve body in the sieving step as a material for cement.

According to the above configuration, the mixed waste is coarsely crushed in the coarse crushing step, and the material to be coarsely crushed in the coarse crushing step is made into a lightweight material, fine particles and weight by a rocking sorter in the rocking sorting process. It is sorted into things. The heavy material selected in the shaking sorting step is crushed in the heavy material crushing step, and the crushed material crushed in the heavy material crushing step and the fine granules selected in the shaking sorting step are merged. Meet at. The crushed matter and fine granules merged in the above merging step are sorted into lightweight, fine-grained and heavy-weight products according to the specific gravity and dimensions in the specific gravity difference sorting step. In the sieving step, the lightweight material selected in the specific gravity difference sorting step is sieved into a residue remaining on the sieving body and a passing material passing through the sieving body. The residue sieved in the sieving step is collected as the first fuel in the first fuel collecting step. Since the residue of this sieving process is mainly combustibles such as wood and paper, it can be put into the cement kiln as fuel before the kiln. Further, the passing material that has passed through the sieve body in the sieving step is collected as a material for cement in the material collecting step. Since the material passed through this sieving process is mainly sand or glass particles, it can be put into the kiln butt of a cement kiln as a material for cement. In this way, for mixed waste that was conventionally disposed of by landfill, a coarse crushing process, a rocking sorting process, a heavy weight crushing process, a merging process, a specific gravity difference sorting process, and a sieving process are performed. By performing the first fuel collecting step and the material collecting step, the first fuel for cement kiln and the material of cement can be manufactured. Here, the mixed waste is a waste in which two or more kinds of materials are mixed, and is, for example, a construction-related mixed waste discharged from a construction site.

In the method for producing a fuel for a cement sieve according to one embodiment, the rocking sorter in the rocking sorting step has a plurality of strips having a plurality of through holes and having serrated locking teeth on both sides in the longitudinal direction. The shaped sieve is swung up and down and back and forth in an inclined posture with respect to the horizontal plane, and an air flow is formed from the rear to the front on the upper side of the strip-shaped sieve to form the air flow on the plurality of strip-shaped sieves. The object to be treated is sent to the upper side in the inclined direction by the locking teeth or the air flow and the heavy object that falls from the lower end in the longitudinal direction with respect to the strip-shaped sieve body. It is configured to sort out lightweight objects that fall from the upper end in the direction and fine particles that pass through the strip-shaped sieve body.

According to the above embodiment, the rocking sorter in the rocking sorting step has a plurality of strip-shaped sieves having a plurality of through holes and provided with serrated locking teeth on both sides in the longitudinal direction with respect to the horizontal plane. It is formed so as to swing up and down and back and forth in an inclined posture and to form an air flow from the rear to the front on the upper side of the strip-shaped sieve body. The object to be processed loaded onto the plurality of strip-shaped sieves of this swing sorter is inclined by the heavy object falling from the lower end in the longitudinal direction with respect to the strip-shaped sieve and the locking teeth or the air flow. It is effectively sorted into a lightweight material that is sent to the upper side in the direction and falls from the upper end in the longitudinal direction of the strip-shaped sieve body, and a fine-grained material that passes through the strip-shaped sieve body.

The method for producing a fuel for cement kiln of one embodiment includes a metal removing step of removing metal from the heavy matter between the shaking sorting step and the heavy matter crushing step.

According to the above embodiment, the heavy material selected in the rocking sorting step is crushed in the heavy material crushing step after the metal is removed in the metal removing step. Therefore, it is possible to prevent the inconvenience of metal being mixed into the first fuel of the cement kiln or the material of the cement.

In one embodiment of the method for producing a fuel for cement kiln, the sieve body in the above-mentioned sieving step is formed to have flexibility and vibrate in a wavy shape.

According to the above embodiment, by using a sieving body formed to have flexibility and vibrate in a wavy shape in the sieving step, the object to be treated is effectively treated while suppressing clogging of the sieving body. Can be sieved. As a result, the first fuel collected in the first fuel collecting step and the cement material collected in the material collecting step can be effectively screened.

The method for producing the fuel for cement kiln of one embodiment includes a lightweight material crushing step of crushing the lightweight material selected in the above-mentioned rocking sorting step.
A wind power sorting process that sorts the object to be crushed in the lightweight material crushing process into a lightweight material and a heavy material by a wind power sorter.
It includes a second fuel collecting step of collecting lightweight materials sorted in the wind power sorting step as a second fuel.

According to the above embodiment, the lightweight material selected in the rocking sorting step is crushed in the lightweight material crushing step. The object to be crushed in the lightweight material crushing step is sorted into a lightweight material and a heavy material by a wind power sorter in the wind power sorting process. The lightweight material sorted in the wind power sorting step is collected as the second fuel in the second fuel collecting step. Since the second fuel collected in the second fuel collection step is mainly composed of combustibles such as plastic, it can be put into the cement kiln before the kiln if it does not contain chlorine, and if it contains chlorine, it can be put into the kiln. It can be put into the kiln butt of a cement kiln.

The method for producing the fuel for cement kiln of one embodiment includes a lightweight material crushing step of crushing the lightweight material selected in the above-mentioned rocking sorting step.
A wind power sorting process that sorts the object to be crushed in the lightweight material crushing process into a lightweight material and a heavy material by a wind power sorter.
An optical sorting process that sorts lightweight products sorted by the wind power sorting process into chlorine-containing and chlorine-free products using an optical sorting machine.
The present invention includes a third fuel collecting step of collecting chlorine-free substances selected in the optical sorting step as a third fuel.

According to the above embodiment, the lightweight material selected in the rocking sorting step is crushed in the lightweight material crushing step. The object to be crushed in the lightweight material crushing step is sorted into a lightweight material and a heavy material by a wind power sorter in the wind power sorting process. The lightweight material selected in the wind power sorting process is sorted into chlorine-containing material and chlorine-free material by an optical sorter in the optical sorting process. The chlorine-free substance selected in the optical sorting step is collected as a third fuel in the third fuel collecting step. Since the third fuel collected in the third fuel collecting step is mainly composed of combustible substances such as plastic and does not contain chlorine, it can be put into the cement kiln in front of the kiln and fired in the cement kiln. It is possible to prevent the mixing of chlorine into the material.

The method for producing the fuel for cement kiln of one embodiment includes a lightweight material crushing step of crushing the lightweight material selected in the above-mentioned rocking sorting step.
A sorting step of distributing the material to be crushed in the lightweight material crushing step into at least the first material to be processed and the second material to be processed.
The first wind sorting step of sorting the first object to be sorted in the sorting step into a lightweight one and a heavy one by a wind sorter,
A second fuel collection process that collects lightweight materials selected in the first wind power sorting process as a second fuel, and
A second wind power sorting process in which the second object to be sorted sorted in the above sorting process is sorted into a lightweight material and a heavy material by a wind power sorter.
An optical sorting step of sorting lightweight substances sorted in the second wind power sorting step into chlorine-containing substances and chlorine-free substances by an optical sorting machine.
The present invention includes a third fuel collecting step of collecting chlorine-free substances selected in the optical sorting step as a third fuel.

According to the above embodiment, the lightweight material selected in the rocking sorting step is crushed in the lightweight material crushing step. The object to be crushed in the lightweight material crushing step is sorted into at least the first object to be processed and the second object to be processed in the distribution step. The first object to be sorted in the sorting step is sorted into a lightweight substance and a heavy object by a wind power sorter in the first wind sorting step. The lightweight material selected in the first wind power sorting step is collected as the second fuel in the second fuel collecting step. The second object to be sorted in the distribution step is sorted into a lightweight substance and a heavy object by a wind power sorter in the second wind power sorting step. The lightweight material selected in the second wind power sorting step is sorted into chlorine-containing material and chlorine-free material by an optical sorter in the optical sorting step. The chlorine-free substance selected in the optical sorting step is collected as a third fuel in the third fuel collecting step. By adjusting the amount of distribution to the first object to be processed and the second object to be processed in the distribution step, the amount of the second fuel collected from the first object to be processed and the second object to be processed are adjusted. The amount of the third fuel collected from the fuel can be adjusted. Therefore, the production amounts of the second fuel and the third fuel can be appropriately adjusted in response to the amount of chlorine-containing substances in the lightweight substances selected in the rocking sorting step, the demand for chlorine-free substances, and the like. Here, the second fuel can be charged before the kiln of the cement kiln when the chlorine-containing material is substantially not present in the lightweight material selected in the rocking sorting step. On the other hand, when the chlorine-containing material in the lightweight material selected in the rocking sorting step exceeds the standard amount, it can be put into the kiln tail of the cement kiln. Further, since the third fuel does not contain chlorine, it can be charged in front of the cement kiln kiln regardless of the amount of chlorine-containing material in the lightweight material selected in the rocking sorting step.

A method for producing a fuel for cement kiln according to an embodiment is characterized by comprising a fourth fuel collecting step for collecting the chlorine-containing material selected in the optical sorting step as a fourth fuel. ..

According to the above embodiment, the chlorine-containing material sorted in the optical sorting step is collected as the fourth fuel in the fourth fuel collecting step. This fourth fuel can be put into the kiln butt of a cement kiln.

In the method for producing fuel for cement kiln according to one embodiment, the wind sorter in the wind sorting step puts the object to be processed into the lower part of the vertical zigzag-shaped pipeline and transfers the air to the lower end of the pipeline. The heavy object is separated into a heavy object and a lightweight object by colliding with the zigzag-shaped inner wall while the object to be processed is being conveyed by the flow of the conveyed air flowing upward in the pipeline. While discharging from the lower end, the lightweight material is configured to be discharged from the upper end of the pipeline and guided to the cyclone separator.

According to the above embodiment, the wind power sorter in the wind power sorting step is formed so as to put the object to be processed into the lower part of the vertical zigzag-shaped pipeline and to supply the conveyed air to the lower end of the pipeline. There is. The object to be processed, which is thrown into the lower part of the pipeline of this wind power sorter, collides with the zigzag-shaped inner wall while being conveyed by the upward flow of the conveyed air in the pipeline, and becomes a heavy object and a lightweight object. To separate. The heavy object is discharged from the lower end of the pipeline, while the lightweight object is discharged from the upper end of the pipeline and guided to the cyclone separator. The lightweight material discharged from the upper end of the pipeline and guided to the cyclone separator is separated from the conveyed air and discharged from the lower end of the cyclone separator. As a result, the lightweight material mainly formed of sheet-shaped plastic can be effectively separated from heavy materials such as foreign substances and deposits, and can be used as a high-quality fuel.

The production plant for the fuel for cement kiln of the present invention includes a coarse crusher for coarsely crushing mixed waste and a coarse crusher.
A rocking sorter that sorts the material to be roughly crushed by the above-mentioned coarse crusher into lightweight, fine-grained, and heavy-weight materials.
A heavy object crusher that crushes heavy objects sorted by the above swing sorter, and a heavy object crusher.
A specific gravity difference sorter that sorts the crushed material crushed by the heavy material crusher and the fine particles sorted by the rocking sorter into lightweight, fine and heavy materials according to the specific gravity and dimensions. When,
It is characterized by being provided with a sieving machine that sifts the lightweight material sorted by the specific gravity difference sorter into a passing material and a residue with a sieving body.

According to the above configuration, the mixed waste is coarsely crushed by the coarse crusher, and the material to be coarsely crushed by the coarse crusher is sorted into lightweight, fine-grained and heavy-weight materials by the rocking sorter. To. The heavy objects sorted by the rocking sorter are crushed by the heavy object crusher. The crushed material crushed by the heavy-weight material crusher and the fine-grained material sorted by the rocking sorter are sorted into lightweight, fine-grained and heavy-weight material according to the specific gravity and dimensions by the specific gravity difference sorter. Will be done. The lightweight material sorted by the specific gravity difference sorter is sieved by the sieve machine into a residue remaining on the sieve body and a passing substance passing through the sieve body. Since the residue sieved by the above sieving machine is mainly combustibles such as wood and paper, it can be collected as a first fuel and put into a cement kiln in front of a kiln. Further, since the passing material that has passed through the sieving body of the sieving machine is mainly sand or glass particles, it can be collected as a material for cement and put into the kiln butt of a cement kiln. In this way, the mixed waste that was conventionally disposed of in landfill is treated by a coarse crusher, a rocking sorter, a heavy weight crusher, a specific gravity difference sorter, and a sieving machine. Thereby, the first fuel for the cement kiln and the material of the cement can be produced. Here, the mixed waste is a waste in which two or more kinds of materials are mixed, and is, for example, a construction-related mixed waste discharged from a construction site.

The cement kiln fuel manufacturing plant of one embodiment includes a lightweight material crusher that crushes lightweight materials sorted by the above-mentioned rocking sorter.
It is provided with a wind power sorter that sorts the object to be crushed by the lightweight object crusher into a lightweight object and a heavy object.

According to the above embodiment, the lightweight material sorted by the rocking sorter is crushed by the lightweight material crusher. The object to be crushed by the lightweight object crusher is sorted into a lightweight object and a heavy object by a wind power sorter. Since the lightweight materials sorted by the above wind power sorter are mainly combustible materials such as plastic, they can be collected as a second fuel and put into the front or bottom of the cement kiln depending on the chlorine content. can.

The fuel manufacturing plant for cement kiln of one embodiment includes an optical sorter that sorts lightweight substances sorted by the wind power sorter into chlorine-containing substances and chlorine-free substances.

According to the above embodiment, the lightweight material sorted by the wind power sorter is sorted into chlorine-containing material and chlorine-free material by the optical sorter. Since the chlorine-free material sorted by the optical sorter is mainly a combustible material such as plastic and does not contain chlorine, it can be collected as a third fuel and put into a cement kiln before the kiln.

It is a block diagram which shows the manufacturing plant of the fuel for cement kiln of the embodiment of this invention. It is a schematic diagram which shows the coarse crushing / sorting line and the heavy object crushing line. It is a schematic cross-sectional view which shows the rocking sorter. It is a schematic cross-sectional view which shows the magnetic separator. It is a schematic cross-sectional view which shows the terminal part of the belt conveyor. It is a schematic diagram which shows the specific density difference sorting line. It is a schematic cross-sectional view which shows the specific density difference sorter. It is a side view which shows the wave sieving machine. It is a partial cross-sectional view which shows the operating state of the sieve body of a wave sieving machine. FIG. 9 is a partial cross-sectional view showing an operating state of the sieve body following FIG. 9A. FIG. 9B is a partial cross-sectional view showing an operating state of the sieve body following FIG. 9B. It is a schematic diagram which shows the lightweight material crushing line and the wind power sorting line. It is a schematic diagram which shows the main part of a wind power sorter. It is a schematic diagram which shows the optical sorting line. It is a schematic cross-sectional view which shows the optical sorter.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

The cement kiln fuel manufacturing plant according to the embodiment of the present invention implements the cement kiln fuel manufacturing method according to the present invention, and uses construction-based mixed waste as mixed waste to Portland cement. It manufactures the fuel and materials used in the cement manufacturing process. Construction-related mixed waste is waste generated by the construction or demolition of a building, and is made of many materials such as concrete pieces, wood chips, metal scraps, waste gypsum board, waste plastics, paper scraps, glass and pottery fragments. It is difficult to reuse because of the mixture of these, and in the past, final disposal by landfill etc. was performed. The cement kiln fuel manufacturing plant of the present embodiment is a fuel that can be used for firing materials with cement kiln in a cement manufacturing process such as Portland cement from mixed waste in which many materials are mixed in this way. Manufacture the material.

As shown in the block diagram of FIG. 1, the cement kiln fuel manufacturing plant 1 includes a coarse crushing / sorting line 2, a heavy material crushing line 3, a specific gravity difference sorting line 4, a lightweight material crushing line 5, and the like. It includes a wind power sorting line 6 and an optical sorting line 7. In the coarse crushing / sorting line 2, mixed waste is put into the rough crushing / sorting line 2 to perform coarse crushing and sorting to form heavy substances, fine particles and lightweight substances. The heavy material crushing line 3 crushes the heavy material formed by the coarse crushing / sorting line 2. The heavy material crushed by the heavy material crushing line 3 and the fine particles from the coarse crushing / sorting line 2 are merged and put into the specific gravity difference sorting line 4, and the specific gravity difference sorting and sieving are performed by the specific gravity difference sorting line 4. Make a division. The specific gravity difference sorting line 4 sorts soil, sand, and the like, combustibles, and dust, and the combustibles are collected as the first fuel for the cement kiln, and the dusts are collected as the material for cement. On the other hand, the lightweight material sorted by the coarse crushing / sorting line 2 is crushed by the lightweight material crushing line 5, and is sorted into a lightweight material and a heavy material by the wind power sorting line 6. Plastic and paper, which are part of the lightweight material sorted by the wind sorting line 6, are collected as the second fuel. On the other hand, the other parts of the lightweight material collected by the wind power sorting line 6 are optically sorted by near infrared rays in the optical sorting line 7, and chlorine-free non-chlorine plastic and paper and chlorine-containing chlorine-based plastic and paper are used. Sorted into plastic. The non-chlorine-based plastic and paper are collected as a third fuel, and the chlorine-based plastic is collected as a fourth fuel. Hereinafter, the configuration of each line and the details of the processes performed in each line will be described.

FIG. 2 is a schematic diagram showing a coarse crushing / sorting line 2 and a heavy object crushing line 3. The coarse crushing / sorting line 2 receives the construction-related mixed waste, coarsely crushes the received construction-related mixed waste, and separates the coarsely crushed object into heavy, lightweight, and fine-grained materials. In the construction-related mixed waste received by the coarse crushing / sorting line 2, concrete lumps and steel frame scraps exceeding a certain size have been removed in advance.

In the coarse crushing / sorting line 2, first, the construction mixed waste carried into the cement kiln fuel manufacturing plant 1 and placed in the yard is put into the coarse crusher 11. The coarse crusher 11 roughly crushes the mixed waste, and the object to be treated in which substances of various dimensions are mixed is crushed to a size of substantially 150 mm or less. The crushing step by the coarse crusher 11 corresponds to the rough crushing step. The coarse crusher 11 is configured by accommodating two rotary-driven rotors in a casing having a hopper with an inclined side plate that forms a processing space narrowed downward. In the rotor, a plurality of rotary blades fixed in phase with each other in the circumferential direction are fixed to the peripheral surface in the longitudinal direction, and the rotors are arranged in parallel with each other in the horizontal direction. The two rotors are rotationally driven in opposite directions to each other, and are formed so as to bite an object to be processed between them and crush them. A known hammer crusher or rotary screw crusher may be used as the coarse crusher 11. The screw crusher may be either a biaxial type or a uniaxial type.

A hood for sucking dust is installed in the opening of the hopper of the coarse crusher 11, and the dust generated when the mixed waste is put into the coarse crusher 11 is sucked through the hood as shown by an arrow V1. Will be done. The sucked dust is collected by a cyclone separator and a dust collector (not shown).

The waste roughly crushed by the coarse crusher 11 is guided to the rocking sorter 12. The rocking sorter 12 separates the object to be processed into a lightweight object, a heavy object, and a fine particle object. Lightweight materials have a relatively small bulk specific gravity, and are mainly composed of sheet-shaped paper, cloth, plastic, and combustible materials such as fiber scraps. Heavy objects have a relatively large bulk specific gravity, and include pieces of wood and combustible substances such as containers and bottles made of synthetic resin. It also includes metals with relatively large dimensions and incombustibles such as pottery and glass. The fine particles have a relatively large true specific density and a small diameter, and include metal particles, pottery particles, earth and sand, and the like.

As shown in the vertical cross-sectional view of FIG. 3, the rocking sorter 12 is supported by being inclined so that the front side is located above the rear side, and the upper portion of the front side portion is formed so as to protrude from the other portions. A roughly box-shaped casing 36, and a plurality of strip-shaped sieve plates 37, which are arranged in the casing 36 with an inclination in the longitudinal direction and swing from the bottom to the top so as to feed the object to be processed. 37, 37, ... Are provided. The casing 36 has an input port 38 provided in the center of the upper portion in the longitudinal direction, a heavy object discharge port 39 provided on one end side of the lower portion in the longitudinal direction, and a fine particle provided in the center of the lower portion in the longitudinal direction. It has a discharge port 40 and a lightweight material discharge port 41 located above the fine particle discharge port 40 and provided on the other end side in the longitudinal direction. Further, at the rear end portion and the upper portion of the casing 36, a first blower portion 50 and a second blower portion 51 for forming an air flow in the casing 36 are provided.

An exhaust port 42 for discharging the air in the casing 36 is provided in the upper part of the front portion of the casing 36. The inner surface of the front end portion 36a of the casing 36 has a normal line from the extending surface of the sieve plate 37 so that the air from the first blower portion 50 and the second blower portion 51, which will be described later, flows in the direction of the exhaust port 42. Is also tilted upward. That is, the inner surface of the front end portion 36a of the casing 36 is at least an extension position parallel to the sieve plate 37 from the blow nozzle of the first blower portion 50 and parallel to the sieve plate 37 from the blow nozzle of the second blower portion 51. At the position on the extension, the normal is inclined so as to face upward with respect to the extension surface of the sieve plate 37.

The sieve plate 37 has a strip-shaped screen made of a punching board or a grid plate, and sawtooth members provided on both sides of the screen in the longitudinal direction. The screen is provided with a plurality of olfactory holes having dimensions of 10 mm or more and 35 mm or less. On the surface of the screen, a plurality of widthwise plates standing in the normal direction of the screen and extending in the width direction are arranged at predetermined intervals in the longitudinal direction of the screen. The sawtooth member is erected at right angles to the screen in the longitudinal view, and the upper edge in the side view is formed in a sawtooth shape in which the anterior ridge of a steep slope and the posterior ridge of a gentle slope are alternately connected. The sieve plate 37 is swingably supported by eccentric bearing units 43 and 44 arranged in the vicinity of both ends in the longitudinal direction. The eccentric bearing units 43 and 44 are supported by support beams 45 and 47 arranged on the front side and the rear side of the lower part of the casing 36.

The support beams 45 and 47 support the casing 36 together with the eccentric bearing units 43 and 44, and are supported by the front column 46 and the rear column 48, respectively. The support column 46 on the front side is formed so as to be expandable and contractible, and the inclination angle between the casing 36 and the sieve plate 37 can be adjusted by adjusting the expansion and contraction length of the support column 46.

While the driving force is input to the eccentric bearing unit 44 that supports the rear side of the sieve plate 37, the eccentric bearing unit 43 that supports the front side of the sieve plate 37 is formed so as to be driven when the sieve plate 37 swings. Has been done. The eccentric bearing unit 44 on the drive side is interposed between a circular eccentric plate that is rotationally driven by a motor, a short cylindrical eccentric swivel member that surrounds the outer circumference of the eccentric plate, and the eccentric plate and the eccentric swivel member. It has a rolling bearing. The eccentric plate is fixed to the drive shaft, and the eccentric bearing units 44 of the plurality of sieve plates 37, 37, 37, ... Are commonly fixed to the drive shaft. The driven side eccentric bearing unit 43 has an eccentric plate and an eccentric swivel member similar to the drive side eccentric bearing unit 44. The eccentric plate is fixed to a support shaft rotatably supported on the support beam 45. In the eccentric bearing unit 44 on the drive side, when the drive shaft is rotationally driven by a motor, the eccentric plate rotates eccentrically around the drive shaft, and the eccentric swivel member rotates eccentrically around the drive shaft. As a result, the sieve plate 37 connected to the eccentric swivel member swings up and down and back and forth. Each cribriform plate 37 is set to have a phase difference of 180 degrees with respect to the adjacent cribriform plate 37. Therefore, when a certain sieve plate 37 is located at the highest point, the sieve plate 37 adjacent to the certain sieve plate 37 operates so as to be located at the lowest point.

The first blower portion 50 provided at the rear end of the casing 36 forms an air flow from the rear to the front in the vicinity of the surface of the sieve plate 37 to be oscillated, and the lightweight object 58 formed by the sieve plate 37. It assists the feed operation. The first blower portion 50 is formed to include a blower pipe connected to a blower (not shown) and a blowout nozzle connected to the blower pipe and having an elongated rectangular opening extending in the width direction. Two first blower portions 50 are arranged in the width direction of the rear end portion of the casing 36. As shown in FIG. 3, the wind blown from the first blower portion 50 as shown by the arrow J1 is substantially parallel to the surface of the sieve plate 37 in the vicinity of the surface of the sieve plate 37 as shown by the arrow K1. It flows.

The second air blower 51 provided in the upper part of the casing 36 forms an air flow from the rear side to the front side of the input port 38 in the vicinity of the input port 38 in the casing 36, and is input from the input port 38. The object 55 to be processed is solved. The second blower portion 51 is formed to include a blower pipe connected to a blower (not shown) and a blowout nozzle connected to the blower pipe and having an elongated rectangular opening extending in the width direction. The opening portion of the blowout nozzle extends parallel to the widthwise edge of the input port 38 having a rectangular shape in the plan view of the casing 36. Two blowout nozzles of the second blower portion 51 are arranged on the top surface of the casing 36 in the width direction. As shown in FIG. 3, the wind blown from the second blower portion 51 as shown by the arrow J2 forms an air flow from the rear side to the front side so as to traverse the inlet 38. This air flow is parallel to the extending direction of the sieve plate 37 in the plan view of the casing 36. The wind blown out from the second blower portion 51 flows in the vicinity of the inlet 38, and then flows above the sieve plate 37 substantially in parallel with the sieve plate 37, as shown by the arrow K2.

When the rocking sorter 12 operates, the cribriform plate 37 having the above configuration is rocked and driven, and the object to be processed 55 is charged into the casing 36 from the charging port 38 as shown by an arrow E. The charged object to be processed is thawed by the wind from the second blower portion 51, and then further thawed by the sieve plate 37 which is oscillated. Among the unraveled objects to be treated, earth and sand, nails, etc. fall downward through the olfactory holes of the sieve plate 37 and are discharged as fine particles 57 from the fine particle discharge port 40 as shown by the arrow F. .. Further, among the charged objects, glass bottles, concrete pieces, stones, etc. roll or slide on the surface of the sieve plate 37 due to gravity, move backward, and fall from the trailing edge of the sieve plate 37. As shown by the arrow G, it is discharged as a heavy object 56 from the heavy object discharge port 39. Here, the heavy object 56 is a repulsive object such as a metal piece, a pottery piece, a hardware, an empty can, a PET bottle, a block, a stone, and shoes. Further, among the charged objects to be processed, the plastic sheet, fiber scraps, paper, etc. are forwarded on the sieve plate 37 by the feeding operation by the sieve plate 37 driven by rocking and the air flow from the first blower portion 50. Will be sent to. The plastic sheet or the like sent to the front of the sieve plate 37 falls from the front end edge and is discharged from the lightweight material discharge port 41 as the lightweight material 58 as shown by the arrow H. Here, the lightweight material 58 is mainly a non-repulsive material such as fiber scraps, paper, plastic film, and the like. In this way, the object to be treated 55 is sorted into a heavy object 56, a lightweight object 58, and a fine particle object 57. That is, the sorting process by the shaking sorting machine 12 corresponds to the shaking sorting step.

During the operation of the swing sorter 12, the wind supplied from the first blower portion 50 and the second blower portion 51 flows in the casing 36 and collides with the inner side surface of the front end portion 36a, and is directed to the arrows M1 and M2. As shown, the direction of flow changes upward. The air whose flow has changed upward in this way passes through the filter 52 arranged in the upper part of the front side portion of the casing 36, and is discharged from the exhaust port 42 as shown by an arrow N. The filter 52 is arranged so as to cross the inside of the casing 36 inside the upper protruding portion of the front side portion of the casing 36, and a plurality of flat bars are arranged and formed in a grid pattern. The filter 52 may be formed of a mesh body such as punching metal or expanded metal, or may be formed by arranging a plurality of flat bars or round bars in parallel with each other. This filter 52 collects the lightweight object 58 as the air flow passes through the filter 52 when the lightweight object 58 is swept by the upward air. The lightweight material 58 collected by the filter 52 falls away from the filter 52 when the air blown by the first blower unit 50 and the second blower unit 51 is stopped, and is discharged from the lightweight material discharge port 41.

A part of the wind supplied from the first blower section 50 and the second blower section 51 is discharged from the lightweight material discharge port 41 of the rocking sorter 12. As shown by the arrow V2 in FIG. 2, the air discharged from the lightweight material discharge port 41 is sucked through the hood arranged in the vicinity of the lightweight material discharge port 41. Further, the air discharged from the exhaust port 42 of the rocking sorter 12 is sucked through a duct (not shown) as shown by an arrow V3 in FIG. The air sucked from the lightweight material discharge port 41 and the exhaust port 42 is guided to a cyclone separator and a dust collector (not shown), and after the dust is removed, the air is discharged to the atmosphere.

The heavy object 56 sorted by the rocking sorter 12 is conveyed by the belt conveyor 13. A magnetic separator 14 is arranged above the belt conveyor 13, and a ferromagnetic material such as iron is collected from a heavy object conveyed by the belt conveyor 13. FIG. 4 is a cross-sectional view schematically showing the magnetic separator 14. The magnetic separator 14 includes two main rollers 61 and 61, two snap rollers 62, an endless feed belt 63 wound around the main rollers 61 and the snap rollers 62, and two main rollers. Between 61 and 61, an electromagnet 65 arranged close to the inner surface of the feed belt 63 is provided. A plurality of crosspieces 64 extending in the width direction are provided on the outer surface of the feed belt 63. The magnetic separator 14 is arranged close to above the conveyor belt of the belt conveyor 13, and the feed belt 63 is driven by one of the main rollers 61 and is operated by applying a current to the electromagnet 65. When the magnetic separator 14 operates, the magnetic force generated by the electromagnet 65 attracts the ferromagnet in the object to be processed on the conveyor belt of the belt conveyor 13. The ferromagnet attracted toward the electromagnet 65 comes into contact with the feed belt 63, is sent to the side of the main roller 61 by the crosspiece of the feed belt 63, and moves away from the electromagnet 65. The magnetic material that has moved away from the electromagnet 65 has a reduced magnetic force received from the electromagnet 65, is separated from the feed belt 63, and is collected in the ferromagnetic material collection container 15.

The workpiece conveyed by the belt conveyor 13 is a pulley type installed at the end of the belt conveyor 13 when the ferromagnet is removed by the magnetic separator 14 and then discharged from the end of the belt conveyor 13. The metal sorter 16 further removes ferromagnets. The pulley type metal sorter 16 can collect ferromagnets that cannot be removed by the magnetic separator 14, such as nails driven into wood. In addition, non-ferromagnetic metals such as aluminum, brass, and copper, which are not sorted by the magnetic separator 14, can be sorted and collected.

FIG. 5 is a schematic cross-sectional view showing the end portion of the belt conveyor 13. As shown in FIG. 5, a pulley type metal sorter 16 is built in the terminal portion of the belt conveyor 13. The pulley type metal sorter 16 includes a pulley body 68 around which a conveyor belt 66 is wound around a peripheral surface, and a magnet 67 rotatably arranged inside the pulley body 68. The pulley body 68 has a cylindrical shape in which a chamber capable of accommodating a magnet 67 is formed inside, and is rotatably formed around a rotation shaft 69. The magnet 67 has a substantially cylindrical shape, and N poles and S poles are alternately formed in the circumferential direction, and as shown by the arrow R1, it is configured to be rotationally driven at high speed around the rotation axis 69. There is.

When the object to be processed carried by the belt conveyor 13 approaches the end of the belt conveyor 13, an eddy current is applied to the non-magnetic metal such as aluminum, copper and brass in the object to be processed by the fluctuation of the magnetic field due to the rotating magnet 67. Occurs. Due to the repulsive force between the magnetic field generated by this eddy current and the magnetic field of the magnet 67, the non-magnetic metal is blown away from the magnet 67 as shown by the arrow Q1. The non-magnetic metal blown due to the overcurrent is collected in the non-magnetic metal collection container 18 located below the end of the belt conveyor 13 and away from the pulley type metal sorter 16. .. On the other hand, non-metals such as plastic, rubber, sand and concrete that are not attracted by the magnet 67 are separated from the end of the conveyor belt 66 by gravity. The object to be processed separated from the conveyor belt 66 falls below the end of the belt conveyor 13 and is guided to the heavy object crushing line 3 as shown by the arrow P. On the other hand, a ferromagnetic material such as iron in the object to be processed is attracted by the magnet 67 and moves outside the pulley body 68 in a state of being attached to the conveyor belt 66. After the ferromagnet moves half a circle outside the pulley body 68, when the conveyor belt 66 reaches a position facing vertically downward, the influence of the magnetic force of the magnet 67 weakens, and as a result, the conveyor belt is caused by gravity as shown by the arrow Q2. Leave 66. The ferromagnet separated from the conveyor belt 66 is collected in the ferromagnet collection container 17 arranged below the traveling direction of the conveyor belt 66. In this way, both the ferromagnetic metal and the non-magnetic metal are removed from the object to be processed on the belt conveyor 13. In this way, the metal removing step is performed by the magnetic separator 14 and the pulley type metal sorter 16. The metal removing step may be performed on either the magnetic separator 14 or the pulley type metal sorter 16.

In the heavy object crushing line 3, the object to be treated from which the metal has been removed is pulverized. In the heavy object crushing line 3, the object to be processed is guided to the belt feeder 20, and a certain amount of the object to be processed is discharged from the belt feeder 20 to the belt conveyor 21. The presence of metal in the object to be processed discharged onto the belt conveyor 21 is detected by the metal detector 22 installed on the belt conveyor 21. When metal is detected in the object to be processed by the metal detector 22, the switching chute 23 arranged downstream of the belt conveyor 21 operates at the timing when the detected metal is discharged from the belt conveyor 21 to detect the metal. The metal collected is charged into the metal collection container 24. The object to be processed other than metal is discharged from the belt conveyor 21, sent to the charging conveyor 25 by the switching chute 23, and charged into the crusher 26.

The crusher 26 is swingably attached to the inside of the processing chamber connected to the input port, a plurality of disk-shaped fixed disks arranged axially around the rotation axis, and the outer peripheral portion of these fixed disks. Equipped with multiple rocking hammers. In the crusher 26, when the rotary shaft is rotationally driven, the swing hammer attached to the outer peripheral portion of the fixed disk rotates while swinging, and the swing hammer crushes the object to be processed to be approximately 50 mm or less. Adjust to the particle size of. In this way, the heavy object crushing step is performed by the crusher 26. The object to be crushed by the crusher 26 is guided to the receiving / supplying machine 71 of the specific gravity difference sorting line 4 as shown by the arrow A in FIGS. 2 and 6 after the process by the heavy object crushing line 3 is completed. As shown by arrows B in FIGS. 2 and 6, fine particles sorted by the rocking sorter 12 are also guided to the receiving / supplying machine 71. That is, the material to be processed obtained by processing the heavy material sorted by the coarse crushing / sorting line 2 in the heavy material crushing line 3 and the fine particles sorted by the coarse crushing / sorting line 2 are the specific gravity difference sorting line. It joins at the receiving and supplying machine 71 of 4. In this way, a merging step is performed in which the crushed material crushed in the heavy object crushing step by the crusher 26 and the fine particles sorted in the shaking sorting step by the shaking sorting machine 12 are merged.

The specific gravity difference sorting line 4 includes a processed material obtained by processing a heavy material selected by the coarse crushing / sorting line 2 in the heavy material crushing line 3 and a fine grain material sorted by the coarse crushing / sorting line 2. The specific gravity difference sorting step and the sieving step are performed on the object to be treated which is formed by merging.

In the specific gravity difference sorting line 4, first, the material to be processed obtained by processing the heavy material sorted by the coarse crushing / sorting line 2 in the heavy material crushing line 3 and the fine granules sorted by the coarse crushing / sorting line 2 A predetermined amount of the object to be processed is discharged from the receiving / supplying machine 71 to the belt conveyor 72. Ferromagnetic materials such as iron are collected by the magnetic separator 73 while the object to be processed discharged from the receiving / supplying machine 71 is being conveyed by the belt conveyor 72. As the magnetic separator 73, the same magnetic separator 14 used in the coarse crushing / sorting line 2 can be used. The ferromagnet collected by the magnetic separator 73 is collected in the ferromagnet collection container 74. The object to be processed from which the ferromagnet has been removed by the magnetic separator 73 is charged into the specific gravity difference sorter 75 from the belt conveyor 72.

FIG. 7 is a schematic cross-sectional view showing the specific gravity difference sorter 75. The specific gravity difference sorter 75 has an input port 82 and an exhaust port 84 for the object to be processed at the upper part, and a lightweight material discharge port 85, a fine particle discharge port 86, a heavy object discharge port 87, and an air supply port 83 at the lower part. A casing 81 having a It has a blower 88 that sends wind through it. The rocking net unit 90 has a mesh having a dimension of 1 mm or more and 10 mm or less, and in a longitudinal cross section, a long side having a gentle inclination angle on one end side and a short side having a steep inclination angle on the other end side alternate. It has a wavy wavy net 91 that is repeatedly formed in the above, and a guide wall 92 that is erected on both sides of the wavy net 91 and guides the object to be processed in the extending direction of the wavy net 91. The wavy network 91 preferably has a mesh size of 1 mm or more and 5 mm or less, depending on the particle size of the fine particles collected through the wavy network 91. The rocking net unit 90 is supported by a frame (not shown) on both sides of the guide wall 92 and by four elastic body links 93 connected to one end side and the other end side in the longitudinal direction. The elastic body link 93 has a metal rod member 93a and rubber joints 93b and 93b connected to both ends of the rod member 93a. In the elastic body link 93, one contact 93b is fixed to the guide wall 92 of the swing net unit 90, and the other contact 93b is fixed to the frame so that the swing net unit 90 can swing with respect to the frame. I support it. A crank mechanism 95 for driving a crank arm is attached to the lower part of the wavy network 91 around the arrow R2. The rocking net unit 90 is supported by the elastic body link 93 and driven by the crank mechanism 95 so as to swing in the vertical and front-back directions as shown by the arrow S. The wind generated by the blower 88 is supplied into the casing 81 from the air supply port 83 as shown by the arrow T, passes through the wavy reticular formation 91 of the rocking net unit 90, flows upward, and is indicated by the arrow 100. As described above, the air is discharged to the outside of the casing 81 from the upper exhaust port 84.

When the specific gravity difference sorter 75 operates, the rocking net unit 90 swings and drives, and the blower 88 blows air into the casing 81, and the object to be processed is charged into the input port 82 as shown by an arrow 96. Ru. The charged object falls on the wavy net 91 of the rocking net unit 90, and the lightweight object moves downward on the wavy net 91 due to the rocking motion of the rocking net unit 90. Then, as shown by the arrow 97, the material is discharged from the lightweight material discharge port 85. The fine particles among the objects to be processed pass through the wavy reticular formation 91 of the rocking net unit 90 and are discharged from the fine particles discharge port 86 as shown by an arrow 98. The heavy object among the objects to be processed moves on the wavy reticular formation 91 toward the upper side of the slope due to the oscillating motion of the wavy reticular formation 91, and is discharged from the heavy object discharge port 87 as shown by an arrow 99. To. In this way, the specific gravity difference sorting process is performed by the specific gravity difference sorter 75.

The exhaust port 84 of the specific gravity difference sorter 75 is connected to a duct (not shown), and as shown by the arrow V4 in FIG. 6, the air in the casing 81 is discharged. A cyclone separator (not shown), a bag filter, and a blower are connected to the downstream of the duct, and the air discharged from the casing 81 is discharged to the atmosphere after dust is removed by the cyclone separator and the bag filter.

Among the objects to be processed sorted by the specific gravity difference sorter 75, the heavy objects are mainly incombustible substances such as stones. Further, the fine particles among the objects to be processed sorted by the specific gravity difference sorter 75 are mainly incombustible materials such as sand and glass particles. Therefore, as shown in FIG. 6, the heavy and fine particles sorted by the specific gravity difference sorter 75 are collected in the earth and sand collection container 76 and finally disposed of by landfill or the like.

The lightweight material among the objects to be processed sorted by the specific gravity difference sorter 75 is guided to the wave sieving machine 77 as a sieving machine for performing a sieving step. FIG. 8 is a side view of the wave sieving machine 77. The wave sieving machine 77 is arranged so as to incline downward from one end on the charging side of the object to be processed toward the other end, and has side walls 105a defining a movement passage of the object to be processed on both sides in the longitudinal direction. A frame 105 is provided. Further, a drive frame 106 connected to the lower portion of the main body frame 105 and reciprocated in the longitudinal direction of the main body frame 105, that is, in the moving direction of the object to be processed is provided. The drive frame 106 is connected to the main body frame 105 so as to be reciprocally driveable by a plurality of links 108. A reciprocating drive mechanism 109 is provided below one end of the main body frame 105, and is composed of a crank mechanism or the like that converts a rotational force transmitted from the motor 110 via a pulley and a belt into a reciprocating linear motion. The reciprocating linear motion converted by the reciprocating drive mechanism 109 is transmitted to the drive frame 106 by the drive rod 111. The drive frame 106 reciprocates in the moving direction of the object to be processed with respect to the main body frame 105 by the reciprocating linear motion transmitted from the reciprocating drive mechanism 109 via the drive rod 111. The main body frame 105 is supported by a support structure via an anti-vibration coil 107.

FIG. 9A is a partial cross-sectional view showing a part of a sieve body built in the wave sieve 77. The sieve body of the wave sieve 77 is a sieve body 114 made of an elastomer such as urethane rubber, and the sieve body 114 is connected to the upper end portion and extends in the lateral direction of the main body frame 105 and is processed. It has a plurality of mesh support beams 112, 113 arranged parallel to each other in the longitudinal direction of the main body frame 105, which is the moving direction of an object. The net support beams 112 and 113 are composed of a movable net support beam 112 connected to the drive frame 106 and a fixed net support beam 113 connected to the main body frame 105, and the movable net support beam 112 and the fixed net support beam 113 are formed. And are arranged alternately. The movable net support beam 112 is fixed to the movable beam 115 spanning the inside of the drive frame 106. The fixed net support beam 113 is fixed to the fixed beam 116 spanned by the main body connecting member 117 protruding downward from the lower end edge of the main body frame 105. The drive frame 106 reciprocates with respect to the main body frame 105 by the reciprocating drive mechanism 109, so that the plurality of movable net support beams 112 reciprocate between the plurality of fixed net support beams 113. ing. The sieve body 114 has an elongated through hole whose longitudinal direction is the moving direction of the movable net support beam 112, and the dimensions of the through hole are set to 50 mm in the longitudinal direction and 2 mm in the lateral direction. As the sieve body 114 expands and contracts due to the operation of the net support beams 112 and 113, the dimensions in the longitudinal direction of the through holes fluctuate, while the dimensions in the lateral direction are kept substantially the same.

9B and 9C are partial cross-sectional views showing an operating state of the sieve body of the wave sieving machine 77, FIG. 9B shows a state following FIG. 9A, and FIG. 9C shows a state following FIG. 9B. First, in FIG. 9A, the movable net support beam 112 and the fixed net support beam 113 are located at equal intervals from each other, and the space between the beams which is a portion between the adjacent movable net support beam 112 and the fixed net support beam 113 of the sieve body 114. Each part has the same amount of bending. When the drive frame 106 reciprocates with respect to the main body frame 105 by the driving force of the reciprocating drive mechanism 109, the movable net support beam 112 becomes the adjacent fixed net support beam 113 and the other fixed net support beam 113. Reciprocate motion so that they approach each other alternately. As a result, as shown in FIG. 9B, when the movable net support beam 112 approaches one of the two adjacent fixed net support beams 113, the inter-beam portion of the sieve body 114 on the approaching side further bends while moving away. The inter-beam portion of the sieve body 114 on the other side extends. On the other hand, as shown in FIG. 9C, when the movable net support beam 112 approaches the other of the two adjacent fixed net support beams 113, the beam-to-beam portion of the extended sieve body 114 in FIG. 9B bends, while FIG. In 9B, the inter-beam portion of the bent sieve body 114 extends. In this way, the movable net support beam 112 alternately approaches the fixed net support beam 113 located on the upstream side and the fixed net support beam 113 located on the downstream side of the movement of the object to be processed, thereby sieving. The inter-beam portions of the body 114 are formed so that the inter-beam portions of the body 114 repeat bending and stretching in opposite phases to each other.

In the process in which the inter-beam portion of the sieve body 114 repeatedly bends and extends, the object to be treated moves upward as shown by the arrow W1 due to the repulsive force generated by the extension of the inter-beam portion of the sieve body 114 as shown in FIG. 9B. It jumps and falls downward as indicated by the arrow X1 as the inter-beam portion of the sieve body 114 bends. On the other hand, when the movable net support beam 112 moves, the object to be processed falls downward as shown by the arrow X2 as the inter-beam portion of the elongated sieve body 114 bends as shown in FIG. 9B. The repulsive force generated by the extension of the beam-to-beam portion of the bent sieve body 114 causes the sieve body 114 to jump upward as shown by the arrow W2. In this way, the movable net support beam 112 moves so as to alternately approach the fixed net support beam 113 on the downstream side and the fixed net support beam 113 on the upstream side, so that the beam-to-beam portion of the sieve body 114 is extended. The object to be processed on the sieve body 114 repeats jumping and falling by repeating bending. As a result, the object to be treated is effectively unraveled, and particles smaller than the through-holes of the sieve body 114 pass through the through-holes and fall below the sieve body 114 as indicated by an arrow Y. On the other hand, the particles larger than the through holes remain on the surface of the sieve body 114 and move in the downward direction of the inclination of the sieve body 114 as shown by the arrow U. According to this wave sieving machine 77, the sieving body 114 made of the elastomer repeatedly expands and bends, so that even if the water content of the fine particles is high, the sieving body 114 passes through the through holes without adhering to the sieving body 114. It can be moved along the surface of the sieve body 114.

The residue remaining on the sieve body 114 of the wave sieve 77 is discharged from the discharge port formed on the other end side of the wave sieve 77. This residue is a combustible material such as paper or wood, and is collected in a combustible material collection container 78. On the other hand, the passing material that has passed through the sieve body 114 of the wave sieve 77 is dust such as gypsum, sand, and glass, and is collected in the dust collection container 79.

The combustibles remaining in the sieve body 114 of the wave sieving machine 77 and collected in the combustibles collecting container 78 have a significantly low amount of incombustibles and metals mixed in, so they are put into the kiln as the first fuel for the cement kiln. can do. As described above, the step of collecting the combustibles in the combustibles collecting container 78 corresponds to the first fuel collecting step. On the other hand, the dust collected in the dust collection container 79 has a significantly low amount of metal mixed in, and most of the dust is a silicon compound and calcium sulfate. Can be thrown into. As described above, the step of collecting the dust in the dust collecting container 78 corresponds to the material collecting step.

In this way, the mixed waste is treated by the coarse crushing / sorting line 2, the heavy weight crushing line 3, and the specific gravity difference sorting line 4, so that the fuel and materials for firing the clinker in the cement kiln can be obtained. Can be manufactured.

In the coarse crushing / sorting line 2, the lightweight material 58 sorted by the rocking sorter 12 is conveyed by the belt conveyor 30 as shown in FIG. The metal detector 31 detects the presence of metal in the object to be conveyed by the belt conveyor 30. When metal is detected in the object to be processed by the metal detector 31, the switching chute 32 arranged downstream of the belt conveyor 30 operates at the timing when the detected metal is discharged from the belt conveyor 30 to detect the metal. The metal collected is charged into the metal collection container 33. The lightweight material other than the metal to be treated is discharged from the belt conveyor 30, and as shown by the arrow C in FIG. 2, the transport destination is switched by the switching chute 32 and guided to the lightweight material crushing line 5.

In the lightweight material crushing line 5, the lightweight material sorted by the coarse crushing / sorting line 2 and from which the metal has been removed is put into the crusher 120. The crusher 120 has a cylindrical rotating body in which a plurality of rotary blades are arranged in a staggered lattice or a spiral on the outer peripheral surface and is rotationally driven inside a processing chamber connected to a charging port, and the rotary blades are described above. It has a fixed blade arranged at a position where it passes opposite to each other. In the processing chamber of the crusher 120, a pusher that pushes the charged object to be processed toward the rotating body is arranged. The crusher 120 crushes the sheet-shaped plastic or paper, which is the object to be processed, which is charged from the charging port, by the shearing action of the rotary blade and the fixed blade. By pushing the object to be processed toward the rotating body by the pusher, the shearing of the object to be processed is effectively promoted. With this crusher 120, the object to be processed is crushed to a size of about 50 mm to 80 mm. In this way, the lightweight material crushing step is performed by the crusher 120.

The object to be crushed by the crusher 120 is guided to the distribution conveyor 121, and is charged into the wind power sorting line 6 by the distribution conveyor 121.

The wind sorting line 6 separates foreign matter from the object to be processed by wind sorting to produce fuel for a cement kiln. As shown in FIG. 10, the wind power sorting line 6 includes a first wind power sorting machine 122A and a second wind power sorting machine 122B connected to the downstream of the distribution conveyor 121, and the first and second wind power sorting machines 122A, respectively. It has a first cyclone separator 123A and a second cyclone separator 123B connected downstream of 122B, respectively. The suction sides of the first blower 124A and the second blower 124B are connected to the discharge ports of the first and second cyclone separators 123A and 123B, respectively, and the discharge sides of the first and second blowers 124A and 124B are described above. They are connected to the air supply ports of the first and second wind power sorters 122A and 122B, respectively. A branch duct is provided in the duct between the first wind power sorter 122A and the first cyclone separator 123A, and is connected to the air supply side of the first parallel cyclone separator 128A. The exhaust side of the first parallel cyclone separator 128A joins the duct between the exhaust side of the first cyclone separator 123A and the air supply side of the first blower 124A. In this way, the first parallel cyclone separator 128A is connected in parallel to the first cyclone separator 123A. Further, the second parallel cyclone separator 128B is connected in parallel to the second cyclone separator 123B.

A first packing device 126 for compressing and packing the discharged object to be processed is connected to the discharge port of the separated product of the first cyclone separator 123A. Further, the second packing device 129 that compresses and packs the discharged object to be discharged into the discharge port of the separated product of the first parallel cyclone separator 128A and the discharge port of the separated product of the second parallel cyclone separator 128B. Is connected. A switching conveyor 132 for switching and discharging the discharged object to be processed in two directions is connected to the discharge port of the separated material of the second cyclone separator 123B.

FIG. 11 schematically shows the structures of the first and second wind power sorters 122A and 122B, and shows the connection circuit between the first and second cyclone separators 123A and 123B and the first and second blowers 124A and 124B. It is a schematic diagram.

As shown in FIG. 11, the first and second wind power sorters 122A and 122B have a zigzag pipe line 135 extending in a zigzag shape in the vertical direction, and an object to be treated provided at the lower part of the zigzag pipe line 135. It has a supply port 135a and an air supply port 135b formed continuously at the lower end of the zigzag pipeline 135. The crushed material continuously supplied from the supply port 135a as shown by an arrow 136 flows through the zigzag pipeline 135 from the bottom to the top by the air supplied from the first and second blowers 124A and 124B through the air supply port 135b. Is swept away. In the process of flowing through the zigzag pipeline 135, it is sorted into a lightweight material such as plastic and a heavy material such as glass and stone. The air flow flowing through the zigzag pipeline 135 is discharged from the upper end portion and conveys a lightweight object to the first and second cyclone separators 123A and 123B. The air carrying the lightweight combustible material is sucked into the first and second blowers 124A and 124B after the lightweight material is separated by the first and second cyclone separators 123A and 123B. As shown by the arrow 139, the lightweight material is discharged from the discharge port at the lower end of the first and second cyclone separators 123A and 123B via the rotary seal valve. The heavy object is discharged from the lower part of the zigzag pipeline 135 as shown by the arrow 140, and is collected as foreign matter in the first and second foreign matter collecting containers 125A and 125B. In this way, the wind power sorting process is performed by the first and second wind power sorters 122A and 122B.

The object to be treated, in which foreign matter is removed by the first wind power sorter 122A and collected by the first cyclone separator 123A, is mainly sheet-shaped plastic or paper. The object to be processed collected by the first cyclone separator 123A is packed by the first packing device 126, and the package 127 is completed. The plastic or paper in the package 127 is used as a second fuel. The step of packing the lightweight material sorted by the first wind power sorter 122A by the first packing device 126 corresponds to the second fuel collecting step.

Further, the objects to be processed that are sorted by the first and second wind power sorters 122A and 122B, guided to the branch duct, and collected by the first and second parallel cyclone separators 128A and 128B are the first cyclone separator 123A. Similarly, it is mainly sheet-shaped plastic or paper. The objects to be processed collected by the first and second parallel cyclone separators 128A and 128B are packed by the second packing device 129, and the packing 130 is completed. The plastic or paper in the package 130 is used as a second fuel in the same manner as that in the package 127. The step of packing the lightweight materials sorted by the first and second wind power sorters 122A and 122B by the second packing device 129 corresponds to the second fuel collecting step.

The second fuel composed of plastic, paper, etc. in the packages 127 and 130 can be used as fuel for cement kiln, and if it does not contain chlorine, it can be put into the kiln of cement kiln, and if it contains chlorine, it can be put in front of the kiln. Can be thrown into the kiln butt of a cement kiln.

The foreign matter is removed by the second wind power sorter 122B, and the object to be processed collected by the second cyclone separator 123B is put into the switching conveyor 132. The switching conveyor 132 switches and supplies the charged object to be processed to either the first packing device 126 or the optical sorting line 7 side. When switched to the first packing device 126 by the switching conveyor 132, the object to be processed collected by the second cyclone separator 123B is packed by the first packing device 126 together with the object to be processed collected by the first cyclone separator 123A. , Package 127 is manufactured. When the switching conveyor 132 is switched to the optical sorting line 7, the object to be processed collected by the second cyclone separator 123B is discharged from the switching conveyor 132 as shown by an arrow D in FIG. 10, and is discharged from the optical sorting line 132 in FIG. It is supplied to the vibration feeder 141 of 7.

The optical sorting line 7 sorts the objects to be sorted by the wind sorting line 6 based on the presence or absence of chlorine components. As shown in FIG. 12, the optical sorting line 7 includes a vibration feeder 141 in which an object to be processed is charged from the switching conveyor 132 of the wind power sorting line 6, and a first optical type in which the object to be processed is supplied by the vibration feeder 141. It includes a sorter 142A and a second optical sorter 142B to which the object to be sorted by the first optical sorter 142A is guided.

The vibration feeder 141 stably discharges the object to be processed on the trough by vibrating the trough that holds and discharges the object to be processed. The object to be processed discharged from the vibration feeder 141 is charged into the conveyor of the first optical sorter 142A, and is a chlorine-containing substance which is a chlorine-containing object and a chlorine-free object which does not contain chlorine. Sorted with inclusions.

FIG. 13 is a schematic cross-sectional view showing the first and second optical sorters 142A and 142B. The first and second optical sorters 142A and 142B are arranged near the transfer conveyor 151 for transporting the charged object to be processed and the end portion of the transfer conveyor 151, and are close to the object to be processed as electromagnetic waves. It includes an optical unit 152 that irradiates infrared rays and receives the reflected wave, an air gun 153 as an injection unit that injects compressed air onto an object to be processed, and a control unit 154 that is connected to the optical unit 152 and the air gun 153. The air gun 153 is connected to a compressor unit 155 that supplies compressed air. The optical unit 152 includes a near-infrared irradiation device 156 as an electromagnetic wave irradiating unit that irradiates the object to be processed on the transport conveyor 151 with near-infrared rays, and a reflected wave detection unit that receives the reflected waves of the near-infrared rays reflected by the object to be processed. Has a near-infrared camera 157. The near-infrared irradiation device 156 is formed by arranging a plurality of pair of light emitting devices that emit near-infrared rays from the front and back in the traveling direction of the belt of the conveyor 151 in the width direction of the belt of the conveyor 151. A lens of the near-infrared camera 157 is arranged between each pair of light emitting devices of the near-infrared irradiation device 156 so as to receive near-infrared rays from below.

In the first and second optical sorters 142A and 142B, when the object to be processed is conveyed by the conveyor 151 and reaches the lower part of the optical unit 152, the near infrared irradiation device 156 of the optical unit 152 processes the near infrared rays. The lens of the near-infrared camera 157 receives a reflected wave that irradiates an object and the irradiated near-infrared rays are reflected by the object to be processed. The near-infrared camera 157 receives the reflected wave of the near-infrared ray, and outputs information indicating the wavelength and intensity of the reflected wave of the near-infrared ray to the control unit 154. The control unit 154 analyzes the wavelength and intensity of the reflected wave from each object to be processed based on the information input from the near-infrared camera 157, and determines the material of the object to be processed based on the spectral distribution. When it is determined that the material of the object to be treated is a chlorine-containing substance such as vinyl chloride, the control unit 154 removes the object to be treated. That is, at the timing when the object to be treated of the chlorine-containing material reaches the end of the conveyor 151, the control unit 154 outputs an operation signal Z to the air gun 153 to operate the air gun 153, and the compressed air is used as the object to be treated of the chlorine-containing material. Spray towards. The object to be treated that has received the compressed air is blown off and discharged from the chlorine-containing substance discharge port 158 on the side far from the end of the conveyor 151, as shown by the arrow 162. The chlorine-free object to be treated falls downward from the end of the conveyor 151 and is discharged from the chlorine-free discharge port 159 provided near the end of the conveyor 151. In this way, the optical sorting step is performed by the first and second optical sorting machines 142A and 142B.

The chlorine-containing material sorted by the first optical sorter 142A is housed in the first chlorine-containing material collection container 146. The chlorine-free substance sorted by the first optical sorter 142A is charged into the second optical sorter 142B. In the second optical sorter 142B, the material of the object to be treated, which was determined to be chlorine-free by the first optical sorter 142A, was analyzed again based on the reflection spectrum of near infrared rays, and the residual chlorine content was contained. Remove things. The chlorine-containing material sorted by the second optical sorter 142B is housed in the second chlorine-containing material collection container 145. The chlorine-free material sorted by the second optical sorter 142B is housed in the chlorine-free material collection container 144.

The objects to be treated collected in the chlorine-free substance collection container 144 are combustible substances such as non-chlorine plastics and paper, and the main non-chlorine plastics are polyethylene, polypropylene, polystyrene, polyethylene terephthalate, and acrylic. Nitrile, butadiene, styrene, etc. Since the object to be treated collected in the chlorine-free substance collection container 144 is a combustible substance containing substantially no chlorine, it can be charged as a third fuel before the kiln of the cement kiln for producing clinker. Here, the chlorine-free material collected in the chlorine-free material collection container 144 is preferably reduced in size to 10 to 30 mm by a crusher before being used as a third fuel, and has a size of 10 mm or less. May be reduced to. By reducing the size of the chlorine-free substance, when it is charged as a third fuel before the kiln of the cement kiln, it is quickly heated and burned by the burner in front of the kiln, and a high calorific value is obtained. The step of collecting the chlorine-free substances sorted by the first and second optical sorters 142A and 142B in the chlorine-free substance collection container 144 corresponds to the third fuel collection step.

The objects to be treated collected in the first and second chlorine-containing material collection containers 145 and 146 are chlorine-based plastics containing chlorine, and the main ones are polyvinyl chloride, polyvinylidene chloride and the like. Since the objects to be treated collected in the first and second chlorine-containing substance collection containers 146 and 145 are combustible substances containing chlorine, they should be put into the kiln butt of the cement kiln that manufactures clinker as the fourth fuel. Can be done. Here, when the fourth fuel, which is a chlorine-containing substance, is charged into the kiln tail of the cement kiln, it is preferable to charge the fourth fuel together with the material of the cement clinker such as lime. The step of collecting the chlorine-containing substances sorted by the first and second optical sorters 142A and 142B in the first and second chlorine-containing material collection containers 145 and 146 corresponds to the fourth fuel collection step.

As described above, according to the cement kiln fuel manufacturing plant 1 of the present embodiment, the coarse crushing / sorting line 2 performs the coarse crushing step and the rocking sorting step for the mixed waste, and the heavy material crushing line 3 By performing the heavy-duty material crushing step in, and performing the merging step, the specific gravity difference sorting step, and the sieving step in the specific gravity difference sorting line 4, the first fuel of the cement kiln can be obtained by the first fuel collecting step, and the material can be collected. Cement material can be obtained by the process. Further, according to the cement kiln fuel manufacturing plant 1 of the above embodiment, the coarse crushing / sorting line 2 performs the coarse crushing step and the rocking sorting step, and the lightweight material crushing line 5 performs the lightweight material crushing process. By performing the wind sorting step in the sorting line 6, the second fuel of the cement kiln can be obtained by the second fuel collecting step. Further, according to the cement kiln fuel manufacturing plant 1 of the above embodiment, the coarse crushing / sorting line 2 performs the coarse crushing step and the rocking sorting step, and the lightweight material crushing line 5 performs the lightweight material crushing process. By performing the wind sorting step in the sorting line 6 and the optical sorting step in the optical sorting line 7, the third fuel of the cement kiln can be obtained by the third fuel collecting step, and the cement is obtained by the fourth fuel collecting step. You can get the fourth fuel of the kiln. As a result, it is possible to effectively utilize the construction-related mixed waste that was conventionally finally disposed of by landfill or the like.

In the above embodiment, the wind power sorting line 6 includes the first wind power sorting machine 122A and the second wind power sorting machine 122B, but the wind power sorting machine may be one. In this case, the lightweight material sorted by one wind power sorter may be collected as the second fuel. Further, the optical sorter may be arranged on the downstream side of one wind sorter to manufacture the third fuel and the fourth fuel. Further, the first parallel cyclone separator 128A and the second parallel cyclone separator 128B may not be provided with either one or both.

Further, in the above embodiment, the optical sorting line 7 includes the first optical sorting machine 142A and the second optical sorting machine 142B, but only the first optical sorting machine 142A may be provided. In this case, the chlorine-free substance sorted by the first optical sorter 142A may be collected as the third fuel, and the chlorine-containing substance may be collected as the fourth fuel.

Further, in the above embodiment, the fuel for the cement kiln is produced using the construction mixed waste, but the mixed waste discharged from other industries may be used.

Further, in the above embodiment, the fuel and material used in the manufacturing process of Portland cement are manufactured, but the fuel and material used in the manufacturing process of other cement requiring a firing step may be manufactured.

The cement kiln fuel manufacturing plant of the present invention may be installed at a position close to the cement kiln or may be installed at a position away from the cement kiln.

The present invention is not limited to the embodiments described above, and many modifications are possible by those who have ordinary knowledge in the art within the technical idea of the present invention.

1 Fuel manufacturing plant for cement kiln 2 Coarse crushing / sorting line 3 Heavy duty crushing line 4 Specific gravity difference sorting line 5 Light weight crushing line 6 Wind power sorting line 7 Optical sorting line 11 Rough crusher 12 Rocking sorting machine 13, 21, 30,72 Belt conveyor 14,73 Magnetic separator 16 Pulley type metal sorter 20 Belt feeder 22,31 Metal detector 23,32 Switching chute 25 Input conveyor 26 Crusher 71 Receiving and feeding machine 75 Specific gravity difference sorter 77 Wave sieve machine 120 Crusher 121 Sorting Conveyor 122A 1st Wind Sorter 122B 2nd Wind Sorter 123A 1st Cyclone Separator 123B 2nd Cyclone Separator 124A 1st Blower 124B 2nd Blower 126 1st Packing Device 128A 1st Parallel Cyclone Separator 128B 2nd Parallel Cyclone separator 129 2nd packing device 132 Switching conveyor 141 Vibration feeder 142A 1st optical sorter 142B 2nd optical sorter

Claims (11)

A coarse crushing process for coarsely crushing mixed waste, which is a mixture of two or more types of materials ,
A shaking sorting step of sorting a material to be roughly crushed in the above coarse crushing step into a lightweight material, a fine grain material, and a heavy material by a rocking sorter.
A heavy object crushing step for crushing heavy objects selected in the above swing sorting step, and a heavy object crushing step.
A merging step in which the crushed material crushed in the heavy material crushing step and the fine granules selected in the shaking sorting step merge.
A specific gravity difference sorting step of sorting the crushed matter and fine granules merged in the above merging step into lightweight, fine and heavy matter according to the specific gravity and dimensions.
A sieving step of sieving the lightweight material selected in the above-mentioned specific gravity difference sorting process into a passing substance and a residue with a sieving body.
The first fuel collection step of collecting the residue remaining on the sieve body in the above sieving step as the first fuel, and
A method for producing a fuel for a cement kiln, which comprises a material collecting step of collecting a passing material passing through a sieve body in the sieving step as a material of cement. In the method for producing a fuel for cement kiln according to claim 1,
The rocking sorter in the rocking sorting step is in a posture in which a plurality of strip-shaped sieve bodies having a plurality of through holes and provided with serrated locking teeth on both sides in the longitudinal direction are inclined with respect to a horizontal plane. The strip-shaped sieve is driven to swing up and down, and an air flow is formed from the rear to the front on the upper side of the strip-shaped sieve body. A heavy object that falls from the lower end in the longitudinal direction with respect to the body, a lightweight object that is sent to the upper side in the inclined direction by the locking teeth or the air flow and falls from the upper end in the longitudinal direction of the strip-shaped sieve body, and the strip-shaped object. A method for producing a fuel for cement kiln, which is configured to be sorted into fine particles passing through a sieve. In the method for producing a fuel for cement kiln according to claim 1,
A method for producing a fuel for cement kiln, which comprises a metal removing step of removing metal from the heavy matter between the rocking sorting step and the heavy matter crushing step. In the method for producing a fuel for cement kiln according to claim 1,
A method for producing a fuel for cement kiln, wherein the sieve body in the sieve step is formed to be flexible and vibrate in a wavy shape. In the method for producing a fuel for cement kiln according to claim 1,
A lightweight material crushing process for crushing lightweight materials selected in the above-mentioned rocking sorting process, and a lightweight material crushing process.
A wind power sorting process that sorts the object to be crushed in the lightweight material crushing process into a lightweight material and a heavy material by a wind power sorter.
A method for producing a fuel for a cement kiln, which comprises a second fuel collecting step of collecting lightweight materials selected in the wind power sorting step as a second fuel. In the method for producing a fuel for cement kiln according to claim 1,
A lightweight material crushing process for crushing lightweight materials selected in the above-mentioned rocking sorting process, and a lightweight material crushing process.
A wind power sorting process that sorts the object to be crushed in the lightweight material crushing process into a lightweight material and a heavy material by a wind power sorter.
An optical sorting process that sorts lightweight products sorted by the wind power sorting process into chlorine-containing and chlorine-free products using an optical sorting machine.
A method for producing a fuel for cement kiln, which comprises a third fuel collecting step of collecting chlorine-free substances selected in the optical sorting step as a third fuel. In the method for producing a fuel for cement kiln according to claim 1,
A lightweight material crushing process for crushing lightweight materials selected in the above-mentioned rocking sorting process, and a lightweight material crushing process.
A sorting step of distributing the material to be crushed in the lightweight material crushing step into at least the first material to be processed and the second material to be processed.
The first wind sorting step of sorting the first object to be sorted in the sorting step into a lightweight one and a heavy one by a wind sorter,
A second fuel collection process that collects lightweight materials selected in the first wind power sorting process as a second fuel, and
A second wind power sorting process in which the second object to be sorted sorted in the above sorting process is sorted into a lightweight material and a heavy material by a wind power sorter.
An optical sorting step of sorting lightweight substances sorted in the second wind power sorting step into chlorine-containing substances and chlorine-free substances by an optical sorting machine.
A method for producing a fuel for cement kiln, which comprises a third fuel collecting step of collecting chlorine-free substances selected in the optical sorting step as a third fuel. In the method for producing a fuel for cement kiln according to claim 6 or 7.
A method for producing a fuel for cement kiln, which comprises a fourth fuel collecting step of collecting chlorine-containing substances selected in the optical sorting step as a fourth fuel. In the method for producing a fuel for cement kiln according to any one of claims 5 to 7.
The wind sorter in the wind sorting process throws the object to be processed into the lower part of the vertical zigzag-shaped pipeline and supplies the conveyed air to the lower end of the conduit, and the conveyed air heading upward in the conduit. While the object to be treated is being conveyed, it collides with a zigzag-shaped inner wall and is separated into a heavy object and a lightweight object. A method for producing a fuel for cement kiln, which is configured to be discharged from the upper end of the pipe and led to a cyclone separator. A coarse crusher that coarsely crushes mixed waste, which is a mixture of two or more types of materials.
A rocking sorter that sorts the material to be roughly crushed by the above-mentioned coarse crusher into lightweight, fine-grained, and heavy-weight materials.
A heavy object crusher that crushes heavy objects sorted by the above swing sorter, and a heavy object crusher.
A specific gravity difference sorter that sorts the crushed material crushed by the heavy material crusher and the fine particles sorted by the rocking sorter into lightweight, fine and heavy materials according to the specific gravity and dimensions. When,
A sieving machine that sifts the lightweight material sorted by the above-mentioned specific gravity difference sorter into a passing material and a residue as a first fuel with a sieving body.
A lightweight material crusher that crushes lightweight materials sorted by the above rocking sorter,
A fuel manufacturing plant for cement kilns, which comprises a wind power sorter that sorts a material to be crushed by the lightweight material crusher into a light material as a second fuel and a heavy material. In the cement kiln fuel manufacturing plant according to claim 10 .
A fuel manufacturing plant for cement kilns, which comprises an optical sorter for sorting lightweight substances sorted by the wind power sorter into chlorine-containing substances and chlorine-free substances.

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