JP7724649B2 - Gas treatment equipment - Google Patents

Description

One embodiment of the present invention relates to a gas treatment device that utilizes solid waste.

By introducing carbon dioxide into solid waste generated in incinerators, such as incineration ash, slag, and contaminated soil, the heavy metals contained in the solid waste react with the carbon dioxide (carbonation). This reaction is known for recycling solid waste and treating it before it is buried at a final disposal site, but it is also effective for treating gases. For example, Patent Documents 1 and 2 disclose devices for bringing carbon dioxide into contact with waste generated in incinerators.

Japanese Patent Application Laid-Open No. 2019-177322 JP 2018-47396 A

An object of one embodiment of the present invention is to provide an apparatus having a novel structure for treating gas using solid waste such as incineration ash. Alternatively, an object of one embodiment of the present invention is to provide an apparatus and method for treating solid waste such as incineration ash with a gas containing carbon dioxide or the like. Alternatively, an object of one embodiment of the present invention is to provide an apparatus and method for treating toxic gases.

One embodiment of the present invention is a gas treatment device. The treatment device includes a casing, a conveyor, a hopper, a discharge pipe, and at least one flexible shield. The casing has a plurality of vent holes for supplying gas. The conveyor is disposed within the casing. The hopper is located above the casing and the conveyor. The discharge pipe is connected to the casing, houses a portion of the conveyor, and is configured to discharge solid waste introduced into the hopper. At least one flexible shield hangs from the inner wall of the discharge pipe toward the conveyor.

One embodiment of the present invention is a method for treating gas. The method includes introducing solid waste into a treatment device, contacting and reacting the solid waste with a gas within the treatment device, and removing the solid waste from the treatment device. The treatment device includes a casing, a conveyor, a hopper, a discharge pipe, and at least one flexible shield. The casing has a plurality of vents for supplying gas. The conveyor is disposed within the casing. The hopper is located above the casing and the conveyor. The discharge pipe is connected to the casing, houses a portion of the conveyor, and is configured to discharge solid waste introduced into the hopper. At least one flexible shield hangs down from the inner wall of the discharge pipe toward the conveyor.

1 is a schematic perspective view of a processing apparatus according to an embodiment of the present invention; 1 is a schematic top view of a processing apparatus according to an embodiment of the present invention; 1 is a schematic end view of a processing apparatus according to an embodiment of the present invention; 1 is a schematic end view of a processing apparatus according to an embodiment of the present invention; 1 is a schematic end view of a processing apparatus according to an embodiment of the present invention; 1 is a schematic end view of a processing apparatus according to an embodiment of the present invention; 1 is a schematic end view of a processing apparatus according to an embodiment of the present invention; 1 is a schematic side view of a processing apparatus according to an embodiment of the present invention; 1 is a schematic top view of a processing apparatus according to an embodiment of the present invention; 1 is a schematic top view of a processing apparatus according to an embodiment of the present invention; 1 is a schematic end view of a processing apparatus according to an embodiment of the present invention; 1 is a schematic end view of a processing apparatus according to an embodiment of the present invention; 1 is a schematic side view of a processing apparatus according to an embodiment of the present invention; 1 is a schematic top view of a processing apparatus according to an embodiment of the present invention;

Each embodiment of the present invention will be described below with reference to the drawings, etc. However, the present invention can be embodied in various forms without departing from the spirit of the invention, and should not be construed as being limited to the description of the embodiments exemplified below.

In order to clarify the explanation, the drawings may show the width, thickness, shape, etc. of each part schematically compared to the actual embodiment, but this is merely an example and does not limit the interpretation of the present invention. In this specification and each figure, elements with the same function as those explained in the previous figures may be given the same reference numerals, and duplicate explanations may be omitted. In the following figures, the xy plane is the horizontal plane, and the z direction is the vertical direction.

Hereinafter, the expression "a structure exposed from another structure" means a state in which a portion of a structure is not covered by another structure, and also includes a state in which this portion not covered by another structure is covered by yet another structure.

The following describes a treatment device 100 for treating gas using solid waste, and a gas treatment method using the treatment device 100. Gases that can be treated include gases containing carbon dioxide, as well as gases containing substances such as nitrogen oxides such as nitric oxide and nitrogen dioxide, sulfur compounds such as sulfur dioxide and hydrogen sulfide, hydrogen chloride, and water. The substances contained in the gas may be gaseous, liquid, or solid. An example of a solid substance is dust. Treating these gases using solid waste makes it possible to fix carbon dioxide, dry the gas, or adsorb toxic substances from the gas, while simultaneously detoxifying the solid waste.

1. Overview Schematic diagrams of a processing apparatus 100 according to one embodiment of the present invention are shown in Figures 1 to 4. Figures 1 and 2 are schematic perspective and top views of processing apparatus 100, respectively, and Figures 3 and 4 are schematic end views taken along dashed lines A-A' and B-B' in Figure 2, respectively.

1 to 4 , the treatment device 100 includes a hopper 102 for inputting solid waste that reacts with or adsorbs substances contained in gas, and a conveyor 112 disposed within a casing 113 below the hopper 102. The treatment device 100 is further connected to a discharge pipe 116 for discharging the solid waste. The discharge pipe 116 may be an independent member from the hopper 102 or the casing 113 and connected to each other, or may be a single member integrated with the hopper 102 or the casing 113.
The processing device 100 is further provided with at least one shield 118 within the discharge pipe 116 (FIG. 4). As an optional configuration, a plurality of (e.g., four or six) legs 104 may be connected to the hopper 102 for stably mounting the hopper 102. The processing device 100 may also be provided with a cap 108 on the discharge pipe 116 for closing the discharge pipe 116.

1-1. Hopper The hopper 102 is a container for introducing solid waste and provides a space where the gas and solid waste come into contact. As shown in FIG. 1, the hopper 102 has a large opening at the top to facilitate the introduction of solid waste. The size of this opening decreases continuously or intermittently as it approaches the casing 113 or the conveyor 112, as shown in FIGS. 2 and 3. This allows solid waste to be supplied to the conveyor 112 located below the hopper 102. The shape of the top opening is not limited and may be, for example, square or rectangular. The size of the top opening can also be selected appropriately. If the top opening is rectangular, the length of one side may be 1 m to 10 m, 1 m to 5 m, or 2 m to 5 m. The height of the hopper 102 (e.g., the distance from the top to the casing 113) can also be determined arbitrarily and may be 0.5 m to 5 m, or 1 m to 3 m. The material used for the hopper 102 can also be selected appropriately, and may be wood, resin, or a material containing metals such as iron, aluminum, or stainless steel. Although not shown, a sprinkler nozzle may be provided for humidifying or cleaning the solid waste or for spraying chemicals onto the solid waste. The installation position of the sprinkler nozzle is not limited, but it may be provided, for example, above the hopper 102.

1-2. Conveyor and Casing The conveyor 112 is a mechanism that moves solid waste to the discharge pipe 116. As described above, the conveyor 112 and casing 113 are disposed below the hopper 102. At least a portion of the conveyor 112 is housed within the casing 113, and the tip of the conveyor 112 is housed within the discharge pipe 116. There are no limitations on the type of conveyor 112, and it may be a belt conveyor, a link conveyor (described below), or a screw conveyor as shown in Figures 2 and 4. The conveyor 112 is connected to and driven by an external power source (not shown). The conveyor 112 may be disposed horizontally, or may be disposed so that the direction of movement of the solid waste is inclined upward from the horizontal plane.

As shown in Figures 3 and 4, the bottom of the casing 113 that houses the conveyor 112 is provided with multiple vent holes 113a through which the gas used in processing can pass, and gas inlet pipes 114 are connected to the vent holes 113a. A gas supply source (not shown) for supplying gas is connected to the gas inlet pipe 114, and the gas is supplied to the casing 113 and hopper 102 through the vent holes 113a. This allows the solid waste to come into contact with the gas within the hopper 102.

A flexible valve 132 may be provided in each vent hole 113a to prevent the vent hole 113a from being blocked by solid waste (Figure 5(A)). Valves 132 may be made of polymeric materials such as polyethylene, polypropylene, polyolefins such as polystyrene, acrylic resins, rubbers such as natural rubber, styrene-butadiene rubber, chloroprene rubber, and acrylonitrile rubber, and silicone resins. Each valve 132 is arranged to completely cover its corresponding vent hole 113a. A portion of each valve 132 is fixed to the casing 113. Specifically, one end of each valve 132, upstream of the direction in which the solid waste is moved by the conveyor 112 (solid arrow in Figure 5(A)), i.e., the end opposite the discharge pipe 116, is fixed to the casing 113, and the opposite end of each valve 132 is fixed to the casing 113 so that it can be removed from the casing 113. This prevents the valve 132 from being deformed by friction with the solid waste. At the same time, when gas is supplied, a portion of the exhaust pipe 116 can be deformed by the gas pressure and move toward the inside of the casing 113, preventing solid waste from falling through the ventilation hole 113a and allowing gas to be supplied into the casing 113 (see the dotted arrow in Figure 5(B)).

Alternatively, as shown in Figure 6(A), instead of the valve 132, a cover 134 may be provided to cover each vent hole 113a. In this case, at least one end opposite the discharge pipe 116 is fixed to the casing 113, and the opposite end is provided so as to be spaced apart from the casing 113. This ensures that a gap is constantly maintained between the cover 134 and the casing 113 through which gas can pass, and also prevents solid waste from falling through this gap. The cover 134 may contain the above-mentioned polymeric materials or metal materials such as iron, copper, aluminum, and stainless steel. However, the cover 134 is constructed to have enough strength so that it will not be deformed by the solid waste and the gap will not disappear.

Alternatively, as shown in Figure 6 (B), a filter 136 made of the polymeric or metallic material described above may be provided in place of the valve 132 and cover 134. The filter 136 has multiple openings through which gas is supplied to the casing 113 and hopper 102. When using the filter 136, the discharge pipe 116 side of the filter 136 may also be fixed to the casing 113. The valve 132, cover 134, and filter 136 may all be fixed to the casing 113 so that they are detachable.

1-3. Tray As shown in FIG. 7 , the processing apparatus 100 may optionally include a tray 106. The tray 106 functions as a container that provides a space for temporarily retaining gas. The tray 106 is provided below the hopper 102, the conveyor 112, or the casing 113. When the tray 106 is provided, a gas inlet pipe 114 is connected to the tray 106, and gas introduced into the space within the tray 106 is supplied to the hopper 102 through the vent hole 113a (see FIGS. 3 and 4 ). To efficiently supply gas to the hopper 102, the length of the tray 106 is preferably the same as the maximum length of the hopper 102, or within ±20% or ±10% of the maximum length of the hopper 102. The tray 106 may be configured to be detachable from the hopper 102 or the casing 113. Therefore, even if solid waste passes through the ventilation holes 113a of the casing 113 and falls onto the tray 106, the tray 106 can be prevented from becoming filled with solid waste by removing the tray 106 from the hopper 102 or the casing 113 and removing the solid waste. The material used for the tray 106 can also be selected appropriately, and may be a material containing wood, resin, or metal such as iron, aluminum, or stainless steel.

1-4. Filter As shown in FIG. 7 , the processing device 100 may further include a filter 110 as an optional component. The filter 110 is provided to allow gas introduced into the tray 106 to pass through and to prevent solid waste introduced into the hopper 102 from passing through the vent hole 113a and falling into the tray 106. Therefore, a mesh net or plate, or a net or plate with openings or slits, may be used as the filter 110. The filter 110 may be fixed to the tray 106 or configured to be detachable from the tray 106. Alternatively, the filter 110 may be fixed to the casing 113 or configured to be detachable from the casing 113. The filter 110 may be provided within the tray 106 or sandwiched between the tray 106 and the casing 113. The material used for the filter 110 may also be selected appropriately, and may include wood, resin, or a material containing metal such as iron, aluminum, or stainless steel.

1-5. Shield The shield 118 is provided to prevent gas supplied from the gas supply source from leaking to the outside. The shield 118 is disposed above the conveyor 112 and hangs down from the inner wall of the discharge pipe 116 toward the conveyor. There is no limit to the number of shields 118, and one or more shields 118 may be provided inside the discharge pipe 116. When multiple shields 118 are provided, the multiple shields 118 overlap each other horizontally inside the discharge pipe 116 (FIG. 4). The shield 118 is flexible and may be configured to be elastically deformable. The shield 118 may include, for example, the polymer material described above.

As shown in the schematic side view of Figure 8(A), the shield 118 is positioned so that a portion of it overlaps horizontally with the conveyor 112. When the conveyor 112 is driven and solid waste is discharged, gravity causes the solid waste to move mainly below the discharge pipe 116, forming a flow path above the discharge pipe 116 through which gas can pass. However, by placing the shield 118, the flow path is blocked, thereby suppressing gas leakage and, as a result, allowing the gas to efficiently come into contact with the solid waste. Therefore, even when using a gas containing a low concentration of carbon dioxide, for example, the increase in the time required to carbonate the solid waste can be minimized.

When the conveyor 112 is driven, a force is applied in the y direction (i.e., the direction toward the discharge pipe 116) from the conveyor 112 or the solid waste discharged by the conveyor 112, causing the shield 118 to bend. However, because the shield 118 is flexible, it is not prone to plastic deformation. Furthermore, if it can be elastically deformed, internal stress is generated that causes it to return to its original state, making it possible to effectively block the flow path through which gas can pass.

There are no restrictions on the shape of the shield 118. If the conveyor 112 is a screw conveyor, the shield 118 may have a shape that surrounds a portion of the screw conveyor (e.g., the central axis (shaft) of the screw conveyor) (Figure 8(B)). Each shield 118 may be composed of a single member (Figures 8(A) and 8(B)), or may be composed of multiple flexible belts (Figure 8(C)). In the latter case, the shield 118 may be configured so that at least two belts have different lengths so as to surround a portion of the screw conveyor (Figure 8(D)). Alternatively, as shown in the schematic top view of Figure 9, the shield 118 may be configured so that multiple belts overlap horizontally. In this case, the shield 118 may be configured so that another belt overlaps horizontally between two adjacent belts. By adopting such a configuration, gas leakage can be more effectively suppressed.

2. Modifications As described above, the type of conveyor 112 is not limited, and a link conveyor may be used as the conveyor 112. In this case, as shown in FIG. 10 , the conveyor 112 is composed of a pipe 126, a chain 120 that runs within the pipe 126, a plurality of disks 122 connected to the chain 120, and a motor 124 that runs the chain 120 within the pipe 126. The pipe 126 is connected at both ends to the hopper 102 so as to sandwich the hopper 102. The chain 120 has both ends connected to each other to form a ring structure, and is disposed within the pipe 126 and the hopper 102. The disks 122 are disposed so that their main surfaces are perpendicular or nearly perpendicular to the extension direction of the chain 120. The motor 124 is driven to run the chain 120 within the pipe 126 and the hopper 102, causing the disks 122 to move the solid waste. Solid waste is removed through an outlet 130 provided in the pipe 126 .

As shown in FIG. 11, the processing device 100 may further include one or more agitators 156 within the hopper 102. The agitators 156 are positioned above the conveyor 112 to agitate the solid waste located in the space above the conveyor 112, thereby allowing the solid waste to come into contact with the gas more efficiently. There are no restrictions on the configuration of the agitators 156, and the rotation axis of the shaft to which the blades are attached may extend horizontally or vertically.

The treatment device 100 may further include a lid 150 for sealing the hopper 102. By providing the lid 150, it is possible to prevent substances that have not reacted with or been adsorbed by the solid waste from being released into the atmosphere, thereby enabling efficient gas treatment. In this case, the lid 150 may be provided with an openable and closable shutter 152. The solid waste is introduced into the hopper 102 through the shutter 152. There are no limitations on the configuration of the shutter 152; for example, as shown in Figure 11, it may be a shielding plate that rotates around an axis extending in the z direction, or one or more shielding plates that move linearly and reversibly in one direction within the xy plane may be used.

Furthermore, the treatment device 100 may be equipped with a screw feeder 160 to facilitate the introduction of solid waste. A hopper 162 for introducing solid waste may be connected to the screw feeder 160. By using the screw feeder 160, solid waste can be introduced at a constant rate. Like the hopper 102, the hopper 162 may also be equipped with a water spray nozzle for humidifying, cleaning, or spraying chemicals on the solid waste. The installation location of the water spray nozzle is not limited, but it may be installed above the hopper 162, for example. The screw feeder 160 may also be equipped with one or more shields 164 to prevent gas leakage.

The processing device 100 may further have an exhaust port 154 connected to the hopper 102 (Figure 12). The exhaust port 154 is installed at the top of the hopper 102, preferably higher than the conveyor 112 and located near the top of the conveyor 112. By providing the exhaust port 154, gases can be discharged after processing. Although not shown, a purification device such as a scrubber may also be connected to the exhaust port 154.

The treatment device 100 may further include a treatment system for supplying treated water for removing water-soluble substances such as chlorine, or chemicals for immobilizing heavy metals such as mercury, copper, lead, cadmium, zinc, and nickel from the solid waste used to treat the gas. Chemicals are selected from compounds that form chelate complexes with heavy metals to insolubilize them, or inorganic heavy metal fixatives. Representative examples include chelating agents with a basic structure such as dithiocarbamic acid, ethylenediamine, or ethylenediaminetetraacetic acid, phosphate compounds, iron compounds, aluminum compounds, carbonate compounds, and sulfides. Chemicals are supplied as aqueous solutions or aqueous suspensions. Hereinafter, aqueous solutions or aqueous suspensions containing chemicals will be collectively referred to as "chemical solutions."

13 and 14, the treatment system may include a conveyor (second conveyor) 140, a supply pipe 142 for supplying water or a chemical solution, and one or more nozzles 144 connected to the supply pipe 142 for discharging the water or chemical solution. The conveyor 140 receives and transports solid waste discharged from a discharge pipe 116 connected to the hopper 102. For this purpose, a portion of the conveyor 140 is positioned below and overlaps the discharge pipe 116. There are no restrictions on the number or type of conveyors 140. For example, as shown in the schematic top view of FIG. 14, the conveyor 140 may be composed of multiple screw conveyors, link conveyors, or belt conveyors. Preferably, the conveyor 140 is positioned so that it can transport solid waste to a position higher than the discharge pipe 116. In this case, the conveyor 140 may be secured to the hopper 102 by a cable 146.

The supply pipe 142 is connected to a water supply source or chemical supply source (not shown), and water or chemical is supplied to the supply pipe 142 by a pump or the like. The supplied water or chemical is sprayed onto the solid waste on the conveyor 140 via a nozzle 144. Therefore, as shown in Figure 14, the nozzle 144 is positioned so that it overlaps the conveyor 140. By tilting the conveyor 140 so that the solid waste can be transported to a position higher than the discharge pipe 116, the probability of contact between the water or chemical and the solid waste increases, allowing for more efficient chemical treatment and making it easier to collect waste liquid generated by water washing or chemical treatment.

In this system, solid waste comes into contact with water or chemicals within the conveyor 140. As a result, washing or chemical treatment is continuously performed on a small amount of solid waste compared to the amount of solid waste placed in the hopper 102. Considering that it is extremely difficult to uniformly bring a large amount of solid waste into contact with a small amount of water or chemicals within the hopper 102, this system can be said to contribute to efficient water washing and chemical treatment of solid waste.

3. Gas Treatment Method A gas treatment method using solid waste will be described below. Here, an example will be described in which a gas containing carbon dioxide is used as the gas, and the solid waste is detoxified while the carbon dioxide is immobilized. First, waste such as garbage is incinerated in an incinerator, and the resulting solid waste, including incineration ash and fly ash, is fed into a hopper 102. The treatment device 100 does not have a complex structure and requires only a limited power source, so it can be easily installed in an existing incineration facility. For example, the solid waste can be transported directly or after cooling using a conveyor (not shown) and then fed into the hopper 102. This significantly reduces the cost and time required for transportation from the incineration facility, and prevents carbon dioxide emissions associated with transportation.

Then, gas containing carbon dioxide is introduced from the carbon dioxide supply source into the casing 113 or tray 106 via the gas inlet pipe 114. The carbon dioxide supply source may be a cylinder or tank filled with carbon dioxide, or the incinerator itself may be used as the carbon dioxide supply source. In the latter case, purified gas containing carbon dioxide obtained by subjecting the exhaust gas discharged from the incinerator to dust removal, desulfurization, denitrification, etc. is introduced into the casing 113 or tray 106. The supply amount and supply rate of the carbon dioxide-containing gas may be set appropriately taking into account the characteristics and amount of the solid waste input, the carbon dioxide concentration in the gas, etc. At this time, the discharge pipe 116 may be blocked with a cap 108 to prevent leakage of the carbon dioxide-containing gas. This allows for more efficient use of carbon dioxide.

When gas containing carbon dioxide is supplied, the carbon dioxide passes through the vent 113a and enters the hopper 102. If the filter 110 is used, the gas containing carbon dioxide passes through the filter 110 and casing 113 and enters the hopper 102. This brings the carbon dioxide into contact with the solid waste, causing a reaction between the carbon dioxide and metal ions such as lead. The metal ions become carbonate or bicarbonate and become insoluble (carbonated). The progress of carbonation can be monitored by monitoring temperature changes in the solid waste, as the carbonation reaction of calcium hydroxide contained in the solid waste is an exothermic reaction. For this reason, a temperature sensor such as a thermocouple may be installed in the treatment device 100.

Once carbonation is complete or has progressed to a certain level, the solid waste is discharged through the discharge pipe 116. That is, the conveyor 112 is driven without the cap 108 attached, and the solid waste is discharged from the bottom of the hopper 102 through the discharge pipe 116. The solid waste may be discharged continuously or intermittently. When the conveyor 112 is driven, the solid waste is subjected to the force of gravity as it is transported, causing it to move along the lower side of the discharge pipe 116. As a result, a space is created above the discharge pipe 116, which can serve as a flow path for gas containing carbon dioxide. However, as described above, the upper part of the discharge pipe 116 is shielded by the shield 118, preventing leakage of gas containing carbon dioxide even when the conveyor 112 is driven without the cap 108 attached. As a result, carbon dioxide can efficiently and safely come into contact with the solid waste to perform carbonation, even when the conveyor 112 is driven.

The discharged solid waste may be washed with water using the treatment system described above, and/or treated with chemicals. Specifically, the solid waste is transported using the conveyor 140 shown in Figures 13 and 14, while water or chemicals are sprayed from nozzles 144. The waste liquid generated during water washing or chemical treatment can be collected via a drain (not shown) and incinerated. For example, this waste liquid may be fed into an incinerator as cooling water.

Solid waste treated using the above process can be reused, for example as a raw material for cement, or can be landfilled at a final disposal site.

When treating substances contained in gas by adsorption instead of gas containing carbon dioxide, an adsorbent or solid reactant is loaded into the hopper 102 along with or instead of the solid waste. Examples of adsorbents include carbon, activated carbon, carbon supporting a metal or metal compound, activated carbon supporting a metal or metal compound, zeolite, amorphous silica gel, and activated alumina. Examples of solid reactants include calcium compounds such as calcium hydroxide and calcium carbonate, sodium compounds such as sodium hydroxide and sodium bicarbonate, iron compounds such as iron hydroxide and iron oxide, and solids containing catalytic elements such as platinum, palladium, and rhodium. The adsorbent or solid reactant may be loaded through a shutter 152 attached to the lid 150, or may be loaded using a screw feeder 160.

Then, gas containing the adsorbed or reacted substance is supplied from the gas inlet pipe 114. At this time, the exhaust pipe 116 may be covered with a cap 108 to prevent gas leakage. In the case of an exothermic reaction, the progress of the adsorption or reaction may be determined by monitoring the temperature change of the adsorbent or solid-state reactant. Alternatively, a sensor for measuring the concentration of the adsorbed substance may be provided at the exhaust port 154 (see Figure 12), and the progress of the adsorption or reaction may be determined based on the change in concentration. If necessary, the adsorbent or solid-state reactant may be stirred using a stirrer 156.

Once the adsorption or reaction is complete or has progressed to a certain level, the adsorbent or solid-based reactant is discharged through the discharge pipe 116. That is, the conveyor 112 is driven without the cap 108 attached, and the adsorbent or solid-based reactant is discharged from the bottom side of the hopper 102. The discharge of the adsorbent or solid-based reactant may be continuous or intermittent. When the conveyor 112 is driven, the adsorbent or solid-based reactant is transported by gravity, causing the adsorbent or solid-based reactant to move along the lower side of the discharge pipe 116. As a result, a space is created above the discharge pipe 116, which can serve as a gas flow path. However, as described above, the upper part of the discharge pipe 116 is shielded by the shield 118, preventing gas leakage even when the conveyor 112 is driven without the cap 108 attached. As a result, contact with the adsorbent or solid-based reactant can be efficiently and safely achieved while suppressing gas leakage even when the conveyor 112 is driven.

The treatment device 100 according to one embodiment of the present invention does not have a complex structure and can therefore be easily installed in existing incineration facilities. Therefore, it can be easily introduced into existing incineration facilities. Furthermore, when treating gases containing carbon dioxide, the carbon dioxide produced in the incineration facility can be effectively utilized. Therefore, the treatment device 100 can be said to contribute to the reduction of greenhouse gases as a means of suppressing carbon dioxide emissions. Furthermore, it is also possible to simultaneously detoxify the solid waste by using carbon dioxide to carbonate heavy metal ions in the solid waste.

Furthermore, since the solid waste, adsorbent, or solid reactants used in the treatment can be discharged from the discharge pipe 116 using the conveyor 112, the solid waste, adsorbent, or solid reactants can be removed without using large heavy machinery to tilt or invert the hopper 102. This makes it possible to carbonate solid waste and remove specific substances contained in gas at low cost. Furthermore, since the solid waste, adsorbent, or solid reactants after gas treatment can be efficiently subjected to water washing or chemical treatment, the solid waste, adsorbent, or solid reactants can be treated more safely.

The above-described embodiments of the present invention can be implemented in any suitable combination, provided they are not mutually inconsistent. Even if a person skilled in the art adds or deletes components or modifies the design based on each embodiment, this also falls within the scope of the present invention, as long as it maintains the essence of the present invention.

Even if there are other effects and advantages different from those provided by the above-described embodiments, those that are clear from the description in this specification or that would be easily predicted by a person skilled in the art are naturally understood to be provided by the present invention.

100: Processing device, 102: Hopper, 104: Leg, 106: Tray, 108: Cap, 110: Filter, 112: Conveyor, 113: Casing, 113a: Vent, 114: Gas inlet pipe, 116: Exhaust pipe, 118: Shield, 120: Chain, 122: Disk, 124: Motor, 126: Pipe, 130: Exhaust port, 132: Valve, 134: Cover, 136: Filter, 140: Conveyor, 142: Supply pipe, 144: Nozzle, 146: Cable, 150: Lid, 152: Shutter, 154: Exhaust port, 156: Agitator, 160: Screw feeder, 162: Hopper, 164: Shield

Claims (11)

casing,
a conveyor disposed within the casing;
a hopper located on the casing and the conveyor;
a discharge pipe connected to the casing, accommodating a portion of the conveyor, and for discharging solid waste introduced into the hopper ;
at least one flexible shield depending from an inner wall of the discharge pipe toward the conveyor;
the casing has a plurality of vent holes for supplying a gas to be brought into contact with the solid waste in the hopper into the hopper ;
A gas treatment device , wherein the plurality of vent holes overlap with the outlet of the hopper and are provided in the lower part of the casing . The processing device of claim 1, further comprising a gas supply pipe connected to the vent hole. The processing device of claim 1, further comprising a tray configured to allow the gas to be introduced below the casing. The processing device of claim 3, further comprising a filter configured to allow the gas to pass between the casing and the tray. The treatment device of claim 1, wherein the gas includes carbon dioxide, nitrogen oxides, sulfur oxides, hydrogen sulfide, hydrogen chloride, or water. The processing device described in claim 1, wherein the conveyor is a screw conveyor or a link conveyor. The processing device of claim 1, wherein the at least one shield overlaps a portion of the conveyor in the horizontal direction. The processing device of claim 1, wherein the at least one shield surrounds a portion of the conveyor. The processing device of claim 1, wherein the at least one shield comprises a plurality of flexible belts depending from the inner wall. the at least one shield comprises a plurality of shields;
The processing apparatus of claim 1 , wherein the plurality of shields overlap each other in the horizontal direction. a second conveyor for transporting the solid waste discharged from the discharge pipe; and a system for supplying a chemical solution to the solid waste discharged from the discharge pipe,
a portion of the second conveyor is positioned below the discharge pipe and overlaps the discharge pipe;
The system comprises:
The treatment device according to claim 1 , further comprising: a supply pipe for supplying the chemical solution; and a nozzle connected to the supply pipe and overlapping with the second conveyor.