JP3899390B2 - Styrofoam self-burning melting furnace - Google Patents

Description

  The present invention relates to a self-burning melting furnace for foamed polystyrene, which is made to melt foamed polystyrene inside the furnace and take it out of the furnace.

In the conventional thermoplastic plastic recycling apparatus disclosed in Patent Document 1, an electric heater is disposed on the back surface of a funnel-shaped heating floor having a bottom surface in a shielded space, and a transparent portion is provided in the center of the heating floor. hole is provided, connected to the through hole below the hole and screw extruders are provided, the electric heater in a heated and melted by the heated floor plastic material these holes and screw extruder It is set as the structure sent out to the said shielding space through.

  At this time, in the screw extruder, the screw feed rotating shaft is inserted inward of the straight cylindrical member, and the shaft end on the feed start end side of the screw feed rotating shaft is fixed to one end of the straight cylindrical member. When the rotational driving force is input from the outside to the rotation input member that extends outward through the through hole of the end face plate and is fixed to the shaft end, the screw feed rotation shaft rotates, and the inside of the straight cylindrical member The plastic material that has flowed into the feed start end is pushed and moved toward the feed end side opening of the straight cylindrical member by the feed force generated by the rotation of the screw feed rotation shaft.

  Further, in the conventional foam waste plastic volume reduction and pulverization apparatus disclosed in Patent Document 2, means for supplying wet hot air generated by the wet hot air generator into the shielded space is formed, and the shielded space is provided. Screw extruding means extending from the bottom of the inside to the outside of the shielded space is formed, and the plastic material melted by the heat of the wet hot air in the shielded space is outside the shielded space by the screw extruding means. It is configured to be sent to the direction.

  At this time, the screw push-out means has a screw feed rotating shaft arranged horizontally in the vicinity of the bottom surface in the shielded space, and a shaft end on the feed start end side of the screw feed rotating shaft is a side peripheral wall of the shielded space. The end of the screw feed rotary shaft on the feed end side is inserted through a cylindrical member that extends outward from the side peripheral surface of the shielding space, and the screw feed rotation When a rotational driving force is input from the outside to the rotation input member fixed to the shaft end on the shaft feed start end side, the screw feed rotation shaft rotates, and the plastic material staying on the bottom surface in the shielding space becomes the screw. It is pushed and moved toward the opening at the outer end of the cylindrical member by a feed force generated by the rotation of the feed rotation shaft.

Japanese Utility Model Publication No. 36-21656 (page 1, Fig. 1) Japanese Utility Model Publication No. 5-53909 (page 3-5, Fig. 1)

  In the above-described conventional apparatus, although it is possible to melt the expanded polystyrene in a specific shielded space and take it out of the shielded space, an electric heater that generates heat for melting the expanded polystyrene or generation of wet hot air A special heat generating means such as a device is required, and the equipment cost is high and enormous running cost is required.

  In addition, when the polystyrene foam melt is sent out of the shielded space in the screw extrusion means, the polystyrene foam is cooled by the outside air at the feed end side, and its fluidity is lowered, and the delivery by the screw feed rotating shaft is hindered. In order to prevent this, it is necessary to heat the feed terminal side of the screw extrusion means with another heat source.

An object of the present invention is to provide a self-burning melting furnace for polystyrene foam that can solve the above-described problems and that can provide additional benefits such as improved durability of the furnace body .

In order to achieve the above object, according to the present invention, as described in claim 1, the vertical furnace body in which a dropping port is formed in the center of the bottom surface portion, and the upper surface of the bottom surface portion in the furnace body are disposed in the vicinity. A fire bed in which a horizontal straight groove portion is formed by a front inclined floor surface portion and a rear inclined floor surface portion, and an upper drop opening is formed at a position directly above the drop opening at the lowest position of the straight groove portion, and the upper drop An airtight structure including a screw feed rotating shaft for feeding a fluid melt in the straight groove portion in a horizontal direction toward the mouth , and including a bearing supporting the screw feed rotating shaft on an outer surface of the peripheral wall of the furnace body And a furnace wall side shaft through-hole for allowing the screw feed rotating shaft to reach the bearing chamber from the inside of the furnace body is formed in the peripheral wall portion, and pressurized air is supplied into the bearing chamber. Air inlet for the bearing chamber wall, In addition to mounting a flame shield cylinder having a smaller diameter than the peripheral wall from the fire floor to the upper part of the peripheral wall with a predetermined gap from the peripheral wall, auxiliary combustion that generates heat for burning the foamed polystyrene in the flame shield cylinder A self-combustion melting furnace provided with an apparatus, wherein the pressurized air supplied into the bearing chamber passes through the clearance between the outer peripheral surface of the screw feed rotary shaft and the furnace wall side shaft through hole, and the inner surface of the flame shielding cylinder On the other hand, it is diverted from the middle of the flow path that flows into the inner surface side of the flame shielding cylinder, and flows into the lower part of the annular space between the peripheral wall and the flame shielding cylinder, and rises to the annular space. It is characterized by a structure that flows out from the upper part of the furnace to the upper part of the furnace body .

The above invention can be embodied as follows.
That is, as described in claim 2, an electric motor for driving the screw feed rotating shaft is provided laterally outward of the bearing chamber, and the screw feed rotating shaft of the bearing chamber is provided on a side plate on the electric motor side of the bearing chamber. A motor side shaft through hole through which the input shaft portion passes is provided, and the peripheral wall portion which is a side plate on the flame shielding cylinder side of the bearing chamber communicates with the furnace wall side shaft through hole and is inserted into the screw feed rotating shaft. A relatively short shaft-passing tube is provided in a projecting manner into the peripheral wall, and a ventilation hole is formed in the tube wall of the shaft-passing tube so that the inside thereof communicates with the annular space. Pressurized air supplied from the inlet portion into the bearing chamber flows out through the gap between the motor side shaft through hole and the outer peripheral surface of the input shaft portion, and on the other hand flows into the shaft through tube and It flows into the inner surface side of the flame shield cylinder from the end opening of the shaft through pipe Together configured to flow into the lower portion within the annular space through the vent holes.

According to a third aspect of the present invention, the screw feed rotating shaft is formed with screw ridges in the reverse winding direction from both end portions toward the center of the length on the outer peripheral surface thereof, and directly above the upper drop port. The pressurizing cover member having a through hole positioned in the opposite direction is fitted with a center portion in the longitudinal direction in a horizontally oriented straight inner hole, and is laterally provided along the lowermost portion of the straight groove portion. A distribution cover member is provided on the fire bed so as to cover the pressure cover member from above, and the distribution cover member receives the expanded polystyrene melt w on the upper surface side. A front inclined surface portion that flows onto the inclined floor surface portion, and a rear inclined surface portion that receives the polystyrene foam melt w and flows onto the rear inclined floor surface portion, and covers a range wider than the range directly above the pressure cover member. The state And, constituting the lower surface of the rear side is supported by being tightly to the rear inclined bottom surface portion with the front side of the lower surface is supported by being tightly to the front inclined bottom surface portion.

Further, as described in claim 4, a blower installed outside the furnace body and sending out pressurized air, a main blower pipe supplied with pressurized air from the blower, and branched from the main blower pipe A plurality of air supply pipes, and the bearing chamber, an exhaust ejector provided at an upper corner of the furnace body for discharging the exhaust in the furnace body to the outside by air injection, and the interior of the furnace body The combustion air ejection pipe provided and the inlet air curtain ejector provided along the inner peripheral surface of the upper end portion of the furnace body on the side facing the position where the exhaust ejector exists are the air supply The pressurized air is supplied through a pipe. At this time, an adjustment valve is provided in the middle of the air supply pipe for supplying the pressurized air to the bearing chamber. An inner lower portion of the flame shield cylinder and the The amount of compressed air flowing into the lower portion of the Jo space is configured to be changed simultaneously adjusted.

Further, as set forth in claim 5, wherein the flame shielding barrel is Rutotomoni upper tubular member stacked upper tubular member to the lower tubular member is positioned in the fitting in the lower tubular member, the old flame shield cylinder is a structure that is formed to have a state in which the upper end of the annular space is open at the top inwardly of the furnace body.

According to the present invention, the following effects can be obtained.
That is, according to the first aspect of the invention, since the polystyrene foam is self-combusted in the furnace body, the polystyrene foam in the furnace body is melted by the heat generated by its own combustion, and the auxiliary combustion device is a polystyrene foam. It induces self-combustion at the start of the melt disposal and causes the polystyrene foam melt in the furnace body to fall into the melt receiver without solidifying at the end of the melt disposal , thus generating conventional electric heaters and wet hot air. A special heat generating means such as an apparatus is unnecessary, and the equipment cost can be reduced, and the running cost can be remarkably reduced.

In addition, the expanded polystyrene melt produced in the furnace can be taken out into the melt receiver by making contact with only the fire bed, pressure cover member and screw feed rotating shaft that are kept at a high temperature by the combustion heat in the furnace. During the take-out of the product, the melt is cooled by the outside air so that it becomes difficult to take out the product. Therefore, the end of the styrofoam melt take-out means was heated with another heat source. Conventional processing is unnecessary.

Further, the foamed polystyrene melt staying in the straight groove portion tends to flow to the furnace wall side shaft through hole side, but the pressurized air supplied into the bearing chamber passes through the furnace wall side shaft through hole side and the flame shielding cylinder. This phenomenon is suppressed because it flows inwardly, so that the foamed polystyrene melt generated in the furnace body does not leak out through the furnace wall side axial hole. Become.

In addition, it is possible to block the combustion heat in the furnace body that is radiated from the bottom surface to a position higher than the furnace body intermediate height in the furnace body vertical direction by the flame shielding cylinder, and to suppress wear of the furnace body. In particular, the life of the furnace body and other mechanisms can be effectively increased by protecting the furnace body portion around the bottom surface where primary combustion is performed with a flame shielding cylinder.

Further, under the annular space between the flame shield cylinder and the peripheral wall of the furnace body, pressurized air supplied into the bearing chamber flows into the annular space before reaching the inside of the flame shield cylinder, It reaches the inside of the annular space without being heated by much heat, and then passes through the annular space so that the heat transfer from the flame shield cylinder to the peripheral wall of the furnace body is effectively performed with pressurized air. It is suppressed, and the prevention of wear of the furnace body becomes more effective, and the pressurized air flowing into the annular space rises while being heated and flows out from the upper part of the annular space to the upper part of the furnace body. Thus, the air necessary for burning the foamed polystyrene in the upper part of the furnace body can be supplied while suppressing the lowering of the ambient temperature of the upper part, and the foaming polystyrene can be effectively melted.

According to the second aspect, the air flowing out from the motor side shaft through hole cools the input shaft portion of the screw feed rotating shaft, and the heat of the screw feed rotating shaft is transmitted to the electric motor. Can be prevented. Further, the pressurized air flowing into the shaft through pipe cools the screw feed rotating shaft heated by the combustion heat of the foamed polystyrene, and the heat of the screw feed rotating shaft can be prevented from being transmitted to the bearing. In addition, the presence of the axial pipe effectively prevents the foamed polystyrene melt generated in the flame shield cylinder from flowing into the bearing chamber, and the inflow of pressurized air into the annular space through the vent hole is accurate. Contributes in being done.

According to the third aspect of the present invention, the screw feed rotating shaft rotates the screw feed rotating shaft in a fixed direction, so that the screw feed rotating shaft removes the foamed styrene melt staying in the straight groove portion of the fire bed from the both ends to a central portion in the length. And the pressure cover member guides the foamed polystyrene melt that has reached the inside to the inside, where the feed force of the screw feed rotary shaft is effectively applied to the foamed polystyrene melt and extruded from the through hole. Since the distribution cover member receives the foamed polystyrene and its melt in the furnace body and does not fall directly on the pressure cover member, the foamed polystyrene is a narrow space near the pressure cover. It does not fall directly into the location or the opening at both ends of the pressure cover member, and the distribution cover member melts the foamed polystyrene. Is divided into front and rear by the front inclined surface portion and the rear inclined surface portion, led to the upper surface of the front inclined floor surface portion and the rear inclined floor surface portion, and then guided to the straight groove portion. Compared with the case where it is made in this way, it becomes difficult for the foamed polystyrene melt to flow to the axial tube side and leads to the straight groove part, and the foamed polystyrene melt treatment in the furnace body and the outside of the foamed polystyrene melt And the distribution cover member is stably supported on the fire bed .

According to the fourth aspect of the present invention, a single air blower can supply necessary air to each of the bearing chamber, the exhaust ejector, the combustion air ejection pipe, and the inlet air curtain ejector. Further, the amount of pressurized air flowing into the inner lower part of the flame shield cylinder and the amount of pressurized air flowing into the lower part of the annular space can be changed and adjusted by a simple operation.

According to the fifth aspect of the present invention, when the flame shield cylinder is exchanged, the lower cylinder member and the upper cylinder member are exchanged so as to move one by one, thereby reducing the work weight. In addition, it is possible to replace only the member on the side of the lower cylinder member or the upper cylinder member on which wear is significant, and the repair cost is reduced. The pressurized air flowing into the annular space rises while being heated and flows out from the entire periphery of the upper part of the annular space to the upper part of the furnace body, and the air necessary for the combustion of the foamed polystyrene in the upper part of the furnace body It is possible to supply effectively while suppressing a decrease in the ambient temperature.

Next, an embodiment of the present invention will be described.
1 is a schematic view showing a self-combustion melting furnace according to the present invention, FIG. 2 is a front view showing the self-combustion melting furnace, FIG. 3 is a side view showing the self-combustion melting furnace, and FIG. 4 is the self-combustion melting furnace. FIG. 5 is a front view showing the inside of the self-combustion melting furnace, FIG. 6 is a side view showing the inside of the self-combustion melting furnace, and FIG. 7 shows the inside of the self-combustion melting furnace. FIG. 8 is a sectional view showing the central part of the firebed, FIG. 9 is a side view showing the screw feed rotating shaft of the self-combustion melting furnace, and FIG. 10 shows the vicinity of the firebed of the self-combustion melting furnace. FIG. 11 is a side view showing the vicinity of the fire bed, FIG. 12 is a plan view showing the periphery of the fire bed, FIG. 13 is a perspective view showing the center part of the fire bed, and FIG. It is a front view which shows the bearing chamber periphery.

1 to 4, 1 is a self-combustion melting furnace, 2 is a blower, and 3 is a fuel tank. The self-combustion melting furnace 1 includes a base 4 having a frame structure, and a vertically-oriented cylindrical furnace body 5 and an electric motor 6 with a speed reduction mechanism are fixed on the base 4. The furnace body 5 includes a furnace body lower step portion 5a having a flat bottom surface portion 7 and a cylindrical peripheral wall 8a, a furnace body middle step portion 5b having a cylindrical peripheral wall 8b, a top surface portion 9 and an input opening / closing lid 10. The furnace body upper stage portion 5c having the above is detachably bolted. At this time, a drop port 7a as shown in FIG. 5 is formed in the central portion of the bottom surface portion 7 in plan view, and the front portion of the peripheral wall 8b of the furnace middle step portion 5b is sized to allow internal inspection and cleaning. In addition, an opening 11 and an opening / closing lid 11a for opening and closing the opening 11 are provided, and an exhaust port a1 is formed in the upper part on the rear surface side of the peripheral wall 8b.

As shown in FIG. 5, a vertical flame shielding cylinder 12 is provided in the peripheral wall 8 a of the furnace body 5 in the vertical range extending from the bottom surface portion 7 to the vicinity of the lower side of the exhaust port a1 inside the peripheral walls 8 a and 8 b of the furnace body 5. , 8b. The flame shield cylinder 12 is positioned by fitting into the upper surface of the bottom surface portion 7 so that an annular space a2 having a diametrical width of about several centimeters or more is formed between the peripheral walls 8a and 8b. The upper cylindrical member 12a is divided into two parts, a lower cylindrical member 12a and an upper cylindrical member 12b. The upper cylindrical member 12b is stacked on the lower cylindrical member 12a and the lower cylindrical member 12a is stacked. It is set as the structure positioned by fitting.

As shown in FIGS. 5 and 6, the fitting for positioning the flame shielding cylinder 12 on the bottom surface portion 7 is made by fixing a plurality of locking pieces 13 on the top surface of the bottom surface portion 7 in an annularly arranged projection shape. The lower end of the lower cylindrical member 12a is fitted to the locking piece 13, and the fitting for positioning the upper cylindrical member 12b on the lower cylindrical member 12a is as shown in FIGS. Further, a plurality of locking pieces 14 are projected at appropriate intervals in the circumferential direction of the upper end edge of the lower cylindrical member 12a or the lower end edge of the upper cylindrical member 12b, and the lower end edge of the upper cylindrical member 12b or The upper end edge of the lower cylindrical member 12a is fitted. Note that the above-described locking pieces 13 and 14 should be positioned so as to abut on the outer peripheral surface of the lower cylindrical member 12a or the upper cylindrical member 12b. Thus, the foamed polystyrene melt w produced in the above step no longer adheres to the locking pieces 13, 14, thereby reducing the trouble of removing dirt on the inner surface of the bottom surface portion 7 and the inner peripheral surface of the flame shielding cylinder 11.

A firebed 15 as shown in FIGS. 5 to 8 is formed in the lower cylindrical member 12a in the furnace lower step part 5a at the bottom part slightly above the bottom surface part 7 in the furnace body 5. The fire floor 15 includes a horizontal straight groove b1 that passes through the approximate center in plan view, and inclined floor surfaces 16 and 16 that descend toward the straight groove b1, and more specifically, A pair of front and rear plane inclined floor surface portions 16 and 16 descending toward two horizontal lines b passing through the approximate center in plan view are provided, and each inclined floor surface portion 16 is formed as a substantially semicircular independent plane plate. A handle portion 16a is attached to the upper surface portion of the center of the length of the arc side portion b3 of the floor surface portion 16, and each inclined floor surface portion 16 is lifted from the bottom surface portion 7 by pulling up each inclined floor surface portion 16 with the handle portion 16a. It is designed to be removed upward. Then, a rectangular upper drop port b4 which is made slightly smaller than the drop port 7a is formed at 15 locations in the fire bed which is the center of the length of the straight groove b1 just above the drop port 7a of the bottom surface portion 7. are formed, said upper chute b4 are formed by cutting the length center point of the straight sides of the inclined surface portion 16.

As shown in FIGS. 9 to 12, the screw feed rotating shaft 17 is horizontally disposed in the substantially entire length range of the lowest position of the straight groove b <b> 1, and both ends of the screw feed rotating shaft 17 are shielded from flame. The tube 12 and shaft pipes 18a and 18b which are arranged at corresponding positions on the peripheral wall 8a of the furnace body lower step portion 5a and fixed to the peripheral wall 8a, and the furnace wall formed in a plate piece which closes the shaft pipes 18a and 18b. It extends to the outside of the furnace body 5 through the side shaft through hole e0 , and each shaft end portion is supported in the bearing chambers 19a and 19b. Each of the bearing chambers 19a and 19b has a box-shaped chamber wall member that covers the shaft pipes 18a and 18b in an airtight manner on the left and right outer surface portions of the peripheral wall 8a of the furnace lower step portion 5a, and a screw on the bottom surface thereof. Bearings 20a and 20b for supporting the shaft end portions of the feed rotating shaft 17 are fixedly provided. The screw feed rotary shaft 17 is provided with a pair of screw ridges c1 and c2 formed on the outer circumferential surface so as to be wound in the reverse winding direction from both ends to the center point of the length. At this time, when the screw feed rotating shaft 17 is rotated, the pair of screw ridges c1 and c2 feeds and moves the styrofoam melt w staying in the straight groove b1 toward the central point side of the length of the straight groove b1. It is something to be made.

As shown in FIG. 12, a cylindrical pressure cover member 21 having a length of about one third of the diameter of the furnace body 5 is externally fitted in a substantially dense manner at the central portion of the length of the screw feed rotating shaft 17. The pressure cover member 21 is provided with a through hole 21a through which the expanded polystyrene melt w is sent out below the central portion of the length thereof. When the screw feed rotary shaft 17 is rotated, the pressure cover member 21 interacts with the pair of screw protrusions c1 and c2 so as to styrofoam melt w staying in the vicinity of the left and right end openings of the pressure cover member 21. Is effectively fed and moved from the left and right end openings to the inside of the pressure cover member 21 to reach the center point of the length of the pressure cover member 21 and flow out from the through hole 21a. At this time, the through hole 21a is smaller in size than the drop port 7a of the bottom surface portion 7 and the upper drop port b4 of the fire floor 15 and is located inside the upper drop port b4. Styrofoam melt w flowing out and falling from the top is prevented from coming into contact with and adhering to the upper drop port b4 or the drop port 7a.

  A distribution cover member 22 as shown in FIGS. 8 and 13 is placed on the pressure cover member 21. The distribution cover member 22 has a concave portion (not shown) that is fitted on the upper surface of the pressure cover member 21 on the lower surface, and a front inclined surface portion d1 and a rear inclined surface portion d2 formed on the upper surface side. A relatively high first peak portion 22a having a ridge line d3 and having a triangular side view cross-sectional shape is formed, and between the front inclined surface portion d1 and the front inclined floor surface portion 16a and the rear inclined surface portion d2. The ridgeline which is located between the rear inclined floor surface portion 16b and formed integrally with the first peak portion 22a, has a left inclined surface portion d4 and a right inclined surface portion d5, has a triangular front view cross-sectional shape, and has a front-rear direction. The lower two front ridges 22b and 22b having d6 are formed, and in the state of being placed on the pressure cover member 21, the lower surface of the front second ridge 22b. Is in close contact with the front inclined floor 16a It is supported regularly, and the lower surface of the second peak portion 22b on the rear side is in close contact with the rear inclined floor surface portion 16b and is stably supported, and the first peak portion 22a has flowed down to the upper surface side thereof. The expanded polystyrene melt w is divided into two parts before and after, and the expanded polystyrene melt w that each second peak portion 22b has flowed down to the upper surface of the expanded polystyrene melt is divided into left and right parts so as to be directed as far as possible to the respective openings of the end faces of the pressure cover member 21. It is supposed to flow down.

As shown in FIGS. 10, 12 and 14, etc., the input shaft portion 17a extended from the right shaft end portion of the screw feed rotating shaft 17 is a motor side shaft formed in the right side surface portion of the right bearing chamber 19b. It extends further outward on the right side through the hole e 1, and is coupled to the output shaft of the electric motor 6 via the coupler 23. Air inlets e2 and e2 are provided on the upper surfaces of the bearing chambers 19a and 19b, and the pressurized air that has flowed in from them is on the one hand the furnace wall side shaft through holes e0 and the screws on the shaft through pipes 18a and 18b. It flows into the inner space of the flame shield cylinder 11 through an annular gap of about 2 mm to 3 mm that exists between the feed rotating shaft 17 and, on the other hand, flows out of the bearing chamber 19b through the motor side shaft through hole e1. It is configured as follows. At this time, a vent hole e3 communicating with the annular space a2 is provided in the upper part of the shaft pipes 18a and 18b. The pressurized air that has reached the annular space a2 through the vent hole e3 flows upward and reaches the inside of the upper portion of the furnace body 5 to be used as combustion air. During the flow, the flame shielding cylinder 11 and the furnace body 5 are used. On the other hand, it flows into the flame shielding cylinder 12 through the furnace wall side shaft through hole e0 and the shaft through pipes 18a and 18b and is used as combustion air, and the flow of the expanded polystyrene melt w becomes a shaft through pipe. Outflow to the inner side of the annular space a2 and the bearing chambers 19a and 19b through 18a and 18b is prevented. The air flowing out from the motor side shaft through hole e1 cools the input shaft portion of the screw feed rotating shaft 17 and prevents the heat of the screw feed rotating shaft 17 from being transmitted to the electric motor 6.

  As shown in FIGS. 10 and 11, a take-out pipe 24 having a diameter larger than that of the drop port 7 a is provided vertically on the lower surface of the bottom surface portion 7, and the take-out pipe 24 is a melt incorporated in the base 4. It is connected to the top plate 26 of the receiver loading box 25 and opened inward of the melt receiver loading box 25. The inner space of the melt receiver loading box 25 is airtight, and an open / close lid 27 is provided on the front surface, and the melt receiver 28 is disposed on the bottom surface in the inner space. Yes. When taking out the expanded polystyrene melt w from the melt receiver loading box 25, the open / close lid 27 is opened, and the melt receiver 28 containing the expanded polystyrene melt w is pulled out. When the polystyrene foam melt w in the melt receiver 28 is completely cooled and solidified, the melt receiver 28 is turned upside down to take out the block of solid foam polystyrene from the melt receiver 28, while the melt receiver 28 An opening / closing lid 27 is opened inside the container loading box 25 and placed in another melt receiver 28. Note that the melt receiver 28 that has been emptied after the solid foam polystyrene is taken out is reused. Solid foamed polystyrene is secondarily used as a fuel body.

As shown in FIGS. 10 and 12, a seed-fire oil storage tank 29 is provided on the outer surface of the peripheral wall 8a of the furnace lower step portion 5a, and a seed-fire oil storage tank is provided in the vicinity of the inner peripheral surface of the lower cylindrical member 12a. An oil pan 30 in which a combustion core 30a made of asbestos or the like to which seed fire oil is supplied from a tank 29 is provided is provided, and the oil pan 30 is covered with an umbrella member (not shown) directly above the furnace body 5. The styrofoam melt w produced therein is prevented from falling onto the combustion core 30a in the oil pan 30.

A kerosene injection nozzle mechanism 31 as an auxiliary combustion device is provided on the outer surface of the peripheral wall 8a of the furnace lower stage portion 5a so as to face the seed-fire oil storage tank 29. The kerosene injection nozzle mechanism 31 is a fuel tank 3. The injection nozzle 32 which is supplied with fuel from the injection nozzle 32 and injects in the form of a mist, the flame shielding cylinder through the injection nozzle 32 through the through hole formed in the flame shielding cylinder 12 and the peripheral wall 8a, and the nozzle support pipe 33 which is inserted into the through hole. 12 includes a nozzle support mechanism 34 that is moved inwardly or retracted into the annular space a2. At this time, the space between the peripheral wall 8a and the nozzle support tube 33 is kept airtight, and the space between the flame shielding cylinder 12 and the nozzle support tube 33 is not required to be kept airtight.

As shown in FIG. 5 to FIG. 9, an air curtain air blower 35 is provided in a range of about one half of the inner peripheral length of the inner peripheral surface of the peripheral wall 8 b at a position facing the exhaust port a <b> 1. The air blower 35 for the curtain is a semicircular air reservoir portion in plan view, and a horizontally long air ejection hole g1 is formed in the circumferential direction on the arcuate inner wall surface portion of the air reservoir portion, and from the outside of the furnace body 5 A through hole g2 for allowing air to flow into the air reservoir is formed in the peripheral wall 8b , and the air supplied from the through hole g2 is directed from the substantially semicircular portion facing the exhaust port a1 to the center of the furnace body 5 in plan view. It is made to erupt.

A combustion air inlet h1 is provided on the upper part of the peripheral wall 8b of the furnace middle stage 5b, and a combustion air jet pipe 36 having a relatively large diameter extends downward from the combustion air inlet h1 at the rear position in the flame shield cylinder 12. In this case, the lower end of the combustion air ejection pipe 36 reaches the vicinity of the fire bed 15, and a large number of air ejection holes h <b> 2 are provided in substantially the entire vertical range of the combustion air ejection pipe 36. Is formed.

The top surface portion 9 of the furnace body upper step portion 5c includes a top plate 37 that is bolted to the upper end of the peripheral wall 8b, and a charging cylinder 38 that is fixed to the top plate 37. The flame shield cylinder 12 can be pulled out of the furnace body 5 by being removed. An opening / closing lid 10 for loading is swingably mounted on the charging cylinder 38 via a fulcrum shaft 10a. An operating rod 39 for opening / closing the opening / closing lid 10 for opening / closing and an opening / closing operating force are provided from the fulcrum shaft 10a. A balance weight 40 for reducing the weight is fixed. A partition plate 41 is mounted inside the input cylinder 38 so as to be pulled out to the right outside in the horizontal direction. The partition plate 41 is placed with the object to be processed in a state in which the inside of the input cylinder 38 is partitioned, and is drawn out with the input opening / closing lid 10 closed to drop the object to be processed into the furnace body 5. Is.

  An exhaust cylinder 42 communicates with the exhaust port a1, and an exhaust ejector 43 is formed in the lower part of the exhaust cylinder 42. The exhaust ejector 43 has a triangular air reservoir 44 in a side view, an air inlet j1 for allowing air to flow into the air reservoir 44 from the outside, and the air reservoir 44 toward the air discharge side. An air ejection hole j3 for ejecting air is provided, and the gas in the furnace body 5 is sucked into the exhaust cylinder 42 by ejecting pressurized air from the air ejection hole j3. The input cylinder 38 and the exhaust cylinder 42 are communicated with each other through a connecting pipe 45 so that the gas in the input cylinder 38 is sucked into the exhaust cylinder 42.

  As shown in FIGS. 2 to 4, a main blower pipe 46 extends from the air outlet of the blower 2, and a combustion air supply pipe communicated from the main blower pipe 46 to the combustion air inlet h <b> 1. 47, an exhaust ejector air supply pipe 48 communicating with the air inlet j1 of the air reservoir 44 of the exhaust ejector 43, and a bearing chamber air supply pipe communicating with the air inflow pipes e2, e2 of the bearing chambers 19a, 19b. 49 and an air curtain air supply pipe 50 communicating with the air inlet g2 of the air curtain air ejector 35 are branched. Adjustment valves 47a, 48a, 49a, and 50a are provided in the middle of the air supply pipes 47, 48, 49, and 50 to adjust the air flow rate to a large or small value.

A use example of the self-combustion melting furnace according to the above-described embodiment will be described.
First, the seed fire oil is supplied into the seed fire storage tank 29, whereby the seed fire oil flows into the oil pan 30 and is adsorbed by the combustion core 30a. Next, the open / close lid 11a is opened, and the seed fire oil adsorbed on the combustion core 30a is burned.

  Thereafter, the opening / closing lid 11a is closed, and the blower 2 is brought into an operating state. Then, the auxiliary nozzle is started by moving the injection nozzle 32 of the kerosene injection nozzle mechanism 31 inward of the flame shield cylinder 12. As a result, kerosene is injected from the injection nozzle 32 and ignited by the heat of the seed fire on the oil pan 30, and then auxiliary combustion is continued.

  Under this state, necessary parts such as the electric motor 6 are put into an operating state, and the opening / closing lid 10 is temporarily opened, and the expanded polystyrene is introduced into the flame shield cylinder 12 through the insertion cylinder 9. The polystyrene foam thus introduced reaches the fire bed 15, where it is ignited and burned by the auxiliary combustion kerosene flame. As the combustion progresses, the styrene foam eventually enters a self-combustion state in which it burns with its own combustion heat. When this state is reached, the auxiliary combustion by the auxiliary combustion device is stopped and the injection nozzle 32 is moved into the annular space a2. Let Thereby, the heat loss of the injection nozzle is prevented.

  Combustion air required for the combustion of the expanded polystyrene is ejected from the combustion air ejection pipe 36, and this combustion air is sequentially flown downward in the combustion air ejection pipe 36 by the combustion heat of the expanded polystyrene. To be heated. Therefore, the combustion air ejected from the lowermost air ejection hole h2 becomes a high temperature suitable for combustion and acts as primary combustion air in the furnace lower stage part 5a, and the air ejection hole at the intermediate height part. The combustion air ejected from h2 acts as secondary combustion air at a temperature slightly lower than that, and these combustion air completely burns the expanded polystyrene in the furnace body 5. On the other hand, the combustion air ejected from the uppermost air ejection hole h2 has a relatively low temperature and contributes to lowering the temperature of the exhaust discharged from the exhaust port a1.

  When the charging lid 10 is opened during the combustion of the polystyrene foam, the combustion flame in the furnace body 5 tends to rise upward through the charging cylinder 9, but the air ejected from the air curtain air ejector 35 is exhausted by the exhaust ejector. An air curtain that is sucked into the exhaust cylinder 42 from the exhaust port a1 by the suction action of 43 and covers substantially the entire horizontal section in the furnace body 5 is formed to suppress such a phenomenon. Therefore, the process of opening the closing lid 10 and charging the expanded polystyrene can be performed without being obstructed by the combustion flame in the furnace body 5.

  When the expanded polystyrene is burned, the expanded polystyrene is melted and greatly reduced in volume by the combustion heat, and falls onto the fire bed 15. The expanded polystyrene melt w thus dropped is distributed to the distribution cover member 22 and the front inclined floor surface portion. 16 and the rear inclined floor surface portion 16 are received by the upper surface of the distribution cover member 22, and the distribution surface of the distribution cover member 22 is relatively relatively reduced by the front inclined surface portion d1, the rear inclined surface portion d2, the left inclined surface portion d4, and the right inclined surface portion d5. Those which are guided toward the left and right end openings of the pressure cover member 21 while being evenly divided and are received by the upper surfaces of the front inclined floor surface portion 16 and the rear inclined floor surface portion 16 are guided toward the straight groove portion b1 by these upper surfaces. Is done.

The foamed polystyrene melt w having a temperature of about 200 ° C. guided in this way is centered in the pressure cover member 21 by the screw protrusions c1 and c2 of the screw feed rotating shaft 17 that is rotated by the electric motor 6. It was moved to the place and placed in the melt receiver loading box 25 through the through hole 21 a of the pressure cover member 21, the upper drop port b 4 of the firebed 15, the drop port 7 a of the bottom part 7, and the take-out pipe 24. It falls into the melt receiver 28 by its own weight. At this time, since the through-hole 21a is located inside the drop openings b4 and 7a and the take-out pipe 24 when viewed from above, the styrene foam melt w falling from the through-hole 21a becomes the edge of the drop openings b4 and 7a and the take-out pipe 24. It does not occur to adhere to the inner surface.

Further, since the polystyrene foam melt w guided to the straight groove b1 stays in the straight groove b1, it tends to flow somewhat toward the axial pipes 18a and 18b due to its fluidity, but the bearing chambers 19a and 19b. The pressurized air that has flowed into the interior flows from the bearing chambers 19a and 19b through the furnace wall side shaft through hole e0 and the shaft through pipes 18a and 18b to flow inward of the flame shield cylinder 12, thereby suppressing the phenomenon. It is. Therefore, a situation in which the expanded polystyrene melt w generated in the furnace body 5 leaks from other than the through holes 21a and the drop ports b4 and 7a does not occur.

  Immediately before the end of the styrene foam combustion treatment, the auxiliary combustion device may be operated as needed to perform auxiliary combustion. In this way, the styrene foam to be burned exists in the furnace body 5. Even after the loss, the polystyrene foam melt w already produced and remaining in the furnace body 5 can be dropped by its own weight into the melt receiver 28 without being solidified by being kept at a high temperature.

  When the self-combustion melting furnace 1 is used for a long time and the inside of the furnace body 5 is contaminated, these are separated by removing the bolts connecting the furnace body lower stage part 5a, the furnace body middle stage part 5b and the furnace body upper stage part 5c. Then, after the flame shielding cylinder 12, the front inclined floor surface portion 16, the rear inclined floor surface portion 16 and the like are removed, each of them can be cleaned. This reduces the work of entering a narrow space and cleaning it.

Further, since the flame shield cylinder 12 is in direct contact with the high-temperature combustion flame, it is worn out earlier than the furnace body 5. In this case, the furnace body upper stage portion 5c is separated from the furnace body middle stage portion 5b. in state, detached raised disconnect the upper tubular member 12b and the lower cylindrical member 12a of the flame shielding cylinder 12 upward and inserted a new flame shielding cylinder 12 instead. Thereby, the lifetime of the furnace body 5 is dramatically extended.

  In the above-described embodiment, the furnace body is a furnace body in which the furnace body lower stage part 5a, the furnace body middle stage part 5b, and the furnace body upper stage part 5c are bolt-coupled. However, the present invention is not limited to this. It is also possible to divide and bolt this. Also, it is possible to provide a plurality of combustion air ejection pipes 36, and the partition plate 41 is omitted, the input cylinder 9 is made high, and the transfer end of the transfer means such as a belt conveyor is brought into the input cylinder 9, Styrofoam can be continuously supplied by the conveying means.

Styrofoam targeted by the apparatus of the present invention is widely used today in food containers such as home appliance packaging and fish boxes, but it is bulky in processing after use, and it is difficult to handle and transport to incinerators etc. It has become. By the way, since the components of foamed polystyrene are originally only carbon and hydrogen , carbon dioxide and water are produced when burned unless oxygen is insufficient, and no harmful substances such as dioxin are generated. without causing any harmful gases by the use, it can be made to allow for the immediate easily and quickly disposed of from time to time the work site, and melt after incineration is withdrawn as a solid which is reduced solubilized, also The solid matter is useful for use as a raw material for recycling or as a fuel material.

It is a side view outline figure showing the self-combustion type melting furnace concerning the present invention. It is a front view which shows the said self-combustion type melting furnace. It is a side view which shows the said self-combustion type melting furnace. It is a top view which shows the said self-combustion type melting furnace. It is a front view which also shows the inside of the said self-combustion type melting furnace. It is a side view which also shows the inside of the said self-combustion type melting furnace. It is a top view which also shows the inside of the said self-combustion type melting furnace. It is sectional drawing which shows the center part of the said fire bed. It is a side view which also shows the screw feed rotating shaft of the said self-combustion type melting furnace. It is a front view which shows the firebed periphery of the said self-combustion type melting furnace. It is a side view which shows the said firebed periphery. It is a top view which shows the said firebed periphery. It is a perspective view which shows the said fire bed center part. It is a front view which shows the bearing chamber periphery of the said self-combustion type melting furnace.

Explanation of symbols

2 Blower 5 Furnace
6 Electric motor
7 Bottom 7a Drop port
8a wall
8b Peripheral wall 12 Flame shielding cylinder 12a Lower cylinder member 12b Upper cylinder member 15 Fire bed 16 Inclined floor surface portion 17 Screw feed rotation shaft
17a Input shaft
18a Shaft through pipe
18b Shaft through pipe
19a Bearing room
19b Bearing room
20a Bearing
20b Bearing 21 Pressure cover member 21a Through hole 22 Distribution cover member
31 Auxiliary combustion device
35 Spout for inlet air curtain
36 Combustion air jet pipe
43 Exhaust ejector
46 Main air duct
47 Air supply pipe
47a Regulating valve
48 Air supply pipe
48a Regulating valve
49 Air supply pipe
49a Regulating valve
50 Air supply pipe
50a Regulating valve a2 Annular space
b1 Straight groove
b4 Upper drop c1 Screw ridge c2 Screw ridge
d1 Front inclined surface
d2 Rear inclined surface
e0 Furnace wall side shaft through hole
e1 Motor side shaft through hole
e2 Air inlet
e3 Vent hole w Styrofoam melt

Claims (5)

A vertical furnace body having a drop opening formed in the center of the bottom surface portion and a front inclined floor surface portion and a rear inclined floor surface portion arranged in the vicinity of the upper side of the bottom surface portion of the furnace body form a horizontal straight groove portion and A fire bed in which an upper dropping port is formed at a position directly above the dropping port at the lowest position of the straight groove portion, and a screw for sending the fluid melt in the straight groove portion in the horizontal direction toward the upper dropping port An air-tight bearing chamber containing a bearing for supporting the screw feed rotary shaft on the outer surface of the peripheral wall of the furnace body, and the screw feed rotary shaft from the inside of the furnace body to the bearing A furnace wall side shaft through-hole for reaching the room is formed in the peripheral wall part, and an air inlet for supplying pressurized air into the bearing room is provided in the surrounding wall of the bearing room, on the other hand, than the peripheral wall A small flame shield tube is placed on the peripheral wall from the fire floor. The self-combustion melting furnace is provided with an auxiliary combustion device for generating heat for burning the foamed polystyrene in the flame shielding cylinder, in addition to being attached to the peripheral wall with a predetermined gap, and supplied to the bearing chamber Pressurized air flows into the inner surface side of the flame shielding cylinder through the gap between the outer peripheral surface of the screw feed rotating shaft and the furnace wall side shaft through-hole, and on the other hand, flows into the inner surface side of the flame shielding cylinder A self-combustion type of polystyrene foam, characterized in that it is diverted from the middle and flows into the lower part of the annular space between the peripheral wall and the flame shield cylinder and rises and flows out from the upper part of the annular space to the upper part of the furnace body Melting furnace. An electric motor for driving the screw feed rotating shaft is provided laterally outward of the bearing chamber, and a motor side shaft through hole through which an input shaft portion of the screw feed rotating shaft is passed is formed on a side plate on the electric motor side of the bearing chamber. And a relatively short shaft pipe that communicates with the furnace wall side shaft through hole and is inserted into the screw feed rotating shaft in the peripheral wall portion that is a side plate on the flame shielding cylinder side of the bearing chamber. A ventilation hole is formed in the tube wall of the shaft tube so that the inside of the shaft tube communicates with the annular space, and the additional air supplied from the air inlet port to the bearing chamber is formed. Compressed air flows outward through a gap between the motor side shaft through hole and the outer peripheral surface of the input shaft portion, and on the other hand, flows into the shaft through tube and shields the flame from the end opening of the shaft through tube. It flows into the inner surface side of the cylinder and the annular shape through the vent hole Styrofoam own燃式melting furnace of claim 1, wherein the structure that flows in the lower part of the between. The screw feed rotary shaft is formed with screw ridges in a reverse winding direction from both ends to the center of the length on the outer peripheral surface of the screw feed rotary shaft, and through holes that are positioned oppositely above the upper drop port. The pressurizing cover member has a horizontally oriented straight inner hole with a central portion in the length direction inserted therein and horizontally provided along the lowermost portion of the straight groove portion. Is provided with a distribution cover member that covers the pressure cover member from above, and the distribution cover member receives the polystyrene foam melt w on the upper surface side and causes the front inclined surface portion to flow onto the front inclined floor surface portion. And a rear inclined surface part that receives and flows the foamed polystyrene melt w onto the rear inclined floor surface part, and covers a range wider than a range directly above the pressure cover member, and a lower surface on the front side Is tilted forward Styrofoam own燃式melting furnace according to claim 1 or 2, wherein the lower surface of the rear side and wherein the supported configuration is tightly to the rear sloped floor surface while being supported by being tightly to the floor surface. A blower installed outside the furnace body for sending out pressurized air, a main blower pipe to which pressurized air is supplied from the blower, and a plurality of air supply pipes branched from the main blower pipe And the bearing chamber, an exhaust ejector that is provided at the upper corner of the furnace body and causes the exhaust in the furnace body to flow outward by air injection, and a combustion air jet pipe provided in the furnace body, The inlet air curtain ejector provided along the inner peripheral surface of the upper end portion of the furnace body on the side facing the existence position of the exhaust ejector is supplied with the pressurized air through the air supply pipe. In this case, an adjustment valve is provided in the middle of the air supply pipe for supplying pressurized air to the bearing chamber, and an inner lower portion of the flame shield cylinder and the adjustment valve are adjusted. Pressurization flowing into the lower part of the annular space Styrofoam own 燃式 melting furnace according to any one of claims 1 to 3, characterized in that the amount of air is changed simultaneously adjusted. The flame shielding cylinder has an upper tubular member lower barrel stacked member Rutotomoni upper tubular member is positioned in the fitting in the lower tubular member, the upper end is the furnace body of the old flame shielding cylinder is the annular space 5. The styrene foam self-combustion melting furnace according to claim 1, wherein the styrene foam self-combustion melting furnace is formed so as to be open to the inside of the upper portion of the styrene foam.

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