Fly ash pyrolysis structure for waste incineration fly ash harmless disposal

Abstract

The utility model discloses a fly ash pyrolysis structure for garbage incineration fly ash harmlessness disposal relates to garbage treatment device technical field, including fly ash storehouse, pyrolysis chamber and quench tower, the one side fixed mounting of fly ash storehouse bottom has double screw metering conveyor, the one side fixed mounting of double screw metering conveyor has water washing groove, the one side fixed mounting of water washing groove has desiccator, the one side fixed mounting of desiccator has a plurality of pyrolysis chambers, and the fixed mounting of a plurality of pyrolysis chambers has conveying pipe. The utility model discloses a plurality of pyrolysis chambers, zoning heating and hollow spiral shaft take stirring blade structure, realize fly ash gradient pyrolysis and even heating, and the problem that the harmlessness is not thorough that is caused by the uneven heating of partial heating is avoided greatly, and the efficient treatment volatile pollutants is assisted with quench tower, activated carbon adsorption tower and catalytic decomposition box combination, and the defect that the present device pollutant treatment is not thorough is solved, and the bottleneck of industrial application is broken through.

Description

Technical Field

[0001] This utility model relates to the technical field of waste treatment devices, specifically to a fly ash pyrolysis structure for the harmless disposal of fly ash from waste incineration. Background Technology

[0002] Waste incineration produces a large amount of fly ash, which contains harmful substances such as heavy metals and dioxins. Improper handling can cause serious environmental pollution. Existing fly ash treatment technologies mainly include cement solidification, melt solidification, and chemical stabilization, but these technologies have problems such as high treatment costs, high risk of secondary pollution, and low resource recycling rate.

[0003] Pyrolysis technology, as a novel method for treating fly ash, has advantages such as high degree of harmlessness and resource recovery. However, existing pyrolysis devices generally suffer from problems such as low pyrolysis efficiency, uneven heating of materials, and incomplete treatment of volatile pollutants, which restricts their industrial application. Therefore, we propose a fly ash pyrolysis structure for the harmless disposal of fly ash from waste incineration. Utility Model Content

[0004] In view of the problems existing in the current fly ash pyrolysis structure for the harmless disposal of fly ash from waste incineration, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a fly ash pyrolysis structure for the harmless disposal of fly ash from waste incineration, which solves the problems of low pyrolysis efficiency, uneven heating of materials, and incomplete treatment of volatile pollutants that are common in existing pyrolysis devices, thus restricting their industrial application.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A fly ash pyrolysis structure for the harmless disposal of fly ash from waste incineration includes a fly ash storage bin, pyrolysis chambers, and a quench tower. A double-screw metering conveyor is fixedly installed on one side of the bottom of the fly ash storage bin. A water washing tank is fixedly installed on one side of the double-screw metering conveyor. A dryer is fixedly installed on one side of the water washing tank. Multiple pyrolysis chambers are fixedly installed on one side of the dryer. Conveying pipes are fixedly installed between the multiple pyrolysis chambers. Each of the multiple conveying pipes is equipped with a first screw conveyor. A cyclone separator is fixedly installed on one side of each pyrolysis chamber. A bag filter is fixedly installed at the gas outlet of the cyclone separator. A second screw conveyor is fixedly installed at the fixed outlet of the bag filter.

[0007] Preferably, a quench tower is fixedly installed at the gas outlet of the bag filter, an activated carbon adsorption tower is fixedly installed on one side of the quench tower, a catalytic decomposition box is fixedly installed at the bottom of the activated carbon adsorption tower, and a tail gas emission pipe is fixedly installed at the bottom of the catalytic decomposition box.

[0008] Preferably, a solid product bin is fixedly installed on one side of the second screw conveyor, a liquid product collection tank is fixedly installed at the condensate outlet of the quench tower, a reflux pipe is fixedly installed at the solid outlet of the cyclone separator, and the feed end of one side of the pyrolysis chamber is fixedly installed at the other end of the reflux pipe.

[0009] Preferably, each of the plurality of pyrolysis chambers is fixedly mounted with a motor at its top, and the output ends of the plurality of motors extend into the interior of the plurality of pyrolysis chambers and are fixedly mounted with hollow spiral shafts. Each of the plurality of hollow spiral shafts is fixedly mounted with a plurality of stirring blades, and each of the plurality of pyrolysis chambers is provided with a plurality of heating zones.

[0010] Preferably, an ultrasonic generator is fixedly installed at the bottom inner side of the washing tank, and multiple spray pipes are fixedly installed inside the washing tank.

[0011] Preferably, the catalytic decomposition chamber is equipped with a gas distribution plate, a honeycomb catalyst carrier and a temperature sensor inside, the honeycomb catalyst carrier is provided with a metal oxide catalyst on its surface, and an electric heating jacket is provided on the outside of the catalytic decomposition chamber.

[0012] The technical effects and advantages provided by this utility model in the above technical solution are as follows: 1. This utility model achieves gradient pyrolysis and uniform heating of fly ash through multiple pyrolysis chambers, zoned heating, and a hollow spiral shaft with stirring blades, significantly improving pyrolysis efficiency and avoiding incomplete harmlessness caused by uneven local heating. Furthermore, by combining a quench tower, activated carbon adsorption tower, and catalytic decomposition box, it efficiently treats volatile pollutants, solving the shortcomings of incomplete pollutant treatment in existing devices and breaking through the bottleneck of industrial application. At the same time, the double spiral metering conveyor precisely controls the feed rate to avoid material waste, and the cyclone separator sends the incompletely pyrolyzed fly ash back to the pyrolysis chamber through the return pipe, improving the fly ash treatment rate and reducing resource consumption. The water washing tank, combined with an ultrasonic generator and spray pipe, effectively removes soluble salts from the fly ash, reduces the generation of corrosive gases during pyrolysis, and reduces equipment wear and the risk of secondary pollution.

[0013] 2. In this utility model, the solid residue after gas-solid separation is sent into the solid product silo by the second screw conveyor, and the condensate from the quench tower is introduced into the liquid product collection tank, so as to realize the recycling of solid and liquid products respectively. The electric heating jacket on the outside of the catalytic decomposition box works in conjunction with the internal metal oxide catalyst to ensure the decomposition efficiency of pollutants. At the same time, the components of the device are fixedly installed to form a continuous process, which improves the overall operational stability and processing efficiency. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the cross-sectional structure of the pyrolysis chamber of this utility model; Figure 3 This is a schematic cross-sectional view of the catalytic decomposition chamber of this utility model; Figure 4 This is a schematic diagram of the cross-sectional structure of the washing tank of this utility model.

[0016] Explanation of reference numerals in the attached figures: 1. Fly ash storage silo; 2. Pyrolysis chamber; 3. Quenching tower; 4. Double spiral metering conveyor; 5. Washing tank; 6. Dryer; 7. Conveying pipe; 8. First spiral conveyor; 9. Cyclone separator; 10. Bag filter; 11. Second spiral conveyor; 12. Activated carbon adsorption tower; 13. Catalytic decomposition box; 14. Tail gas emission pipe; 15. Solid product silo; 16. Liquid product collection tank; 17. Return pipe; 18. Motor; 19. Hollow spiral shaft; 20. Stirring blades; 21. Heating zone; 22. Ultrasonic generator; 23. Spray pipe; 24. Gas distribution plate; 25. Honeycomb catalyst carrier; 26. Temperature sensor; 27. Electric heating jacket. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0018] This utility model discloses a fly ash pyrolysis structure for the harmless treatment of fly ash from waste incineration.

[0019] This utility model provides, for example Figure 1-4The fly ash pyrolysis structure shown includes a fly ash storage bin 1, a pyrolysis chamber 2, and a quench tower 3 for the harmless disposal of fly ash from waste incineration. A double-screw metering conveyor 4 is fixedly installed on one side of the bottom of the fly ash storage bin 1. A water washing tank 5 is fixedly installed on one side of the double-screw metering conveyor 4. A dryer 6 is fixedly installed on one side of the water washing tank 5. Multiple pyrolysis chambers 2 are fixedly installed on one side of the dryer 6. Conveying pipes 7 are fixedly installed between the multiple pyrolysis chambers 2. Each of the multiple conveying pipes 7 is equipped with a first screw conveyor 8. A cyclone separator 9 is fixedly installed on one side of each pyrolysis chamber 2. A bag filter 10 is fixedly installed at the gas outlet of the cyclone separator 9. A second screw conveyor 11 is fixedly installed at the fixed outlet of the bag filter 10.

[0020] This utility model discloses a fly ash pyrolysis structure for the harmless treatment of fly ash from waste incineration. A quench tower 3 is fixedly installed at the gas outlet of the bag filter 10. An activated carbon adsorption tower 12 is fixedly installed on one side of the quench tower 3. A catalytic decomposition box 13 is fixedly installed at the bottom of the activated carbon adsorption tower 12. A tail gas emission pipe 14 is fixedly installed at the bottom of the catalytic decomposition box 13.

[0021] This utility model discloses a fly ash pyrolysis structure for the harmless treatment of fly ash from waste incineration. A solid product silo 15 is fixedly installed on one side of the second screw conveyor 11, a liquid product collection tank 16 is fixedly installed at the condensate outlet of the quench tower 3, a return pipe 17 is fixedly installed at the solid outlet of the cyclone separator 9, and the feed end of one side of the pyrolysis chamber 2 is fixedly installed at the other end of the return pipe 17.

[0022] This utility model discloses a fly ash pyrolysis structure for the harmless treatment of fly ash from waste incineration. Each of the multiple pyrolysis chambers 2 has a motor 18 fixedly installed on its top. The output ends of the multiple motors 18 extend into the interior of the multiple pyrolysis chambers 2 and are fixedly installed with hollow spiral shafts 19. Multiple stirring blades 20 are fixedly installed on the surface of the multiple hollow spiral shafts 19. Multiple heating zones 21 are provided inside the multiple pyrolysis chambers 2.

[0023] This utility model discloses a fly ash pyrolysis structure for the harmless treatment of fly ash from waste incineration. An ultrasonic generator 22 is fixedly installed at the bottom inner side of the water washing tank 5, and multiple spray pipes 23 are fixedly installed inside the water washing tank 5.

[0024] This utility model discloses a fly ash pyrolysis structure for the harmless treatment of fly ash from waste incineration. The catalytic decomposition box 13 is equipped with a gas distribution plate 24, a honeycomb catalyst carrier 25 and a temperature sensor 26 inside. The surface of the honeycomb catalyst carrier 25 is provided with a metal oxide catalyst, and the outside of the catalytic decomposition box 13 is provided with an electric heating jacket 27.

[0025] In use, the fly ash in the fly ash storage silo 1 is precisely conveyed to the washing tank 5 by a double-spiral metering conveyor 4 on one side of the bottom. The ultrasonic generator 22 at the bottom of the inner side of the washing tank 5 assists in oscillation, and water is sprayed by the internal spray pipe 23 to remove soluble salts from the fly ash. The pretreated fly ash is sent to the dryer 6 for dehydration. The dried fly ash enters multiple pyrolysis chambers 2 connected in series. The motor 18 at the top of the pyrolysis chamber 2 drives the hollow spiral shaft 19 to rotate. The stirring blades 20 on the shaft stir the fly ash. At the same time, multiple heating zones 21 in the pyrolysis chamber 2 heat the fly ash at a set temperature to achieve gradient pyrolysis. The fly ash is transferred between adjacent pyrolysis chambers 2 by the first spiral conveyor 8 in the conveying pipe 7 to ensure continuous pyrolysis. The gas-solid mixture generated by pyrolysis enters the cyclone separator 9 to separate the solids. The solid particles are sent back to the feed end of the pyrolysis chamber 2 via the return pipe 17 to participate in pyrolysis again. The separated gas enters the bag filter 10 for further impurity removal. The solid residue after impurity removal is sent to the solid product silo 15 via the second screw conveyor 11. The gas discharged from the bag filter 10 enters the quench tower 3 for rapid cooling. The condensate generated by cooling is introduced into the liquid product collection tank 16. The flue gas after quenching enters the activated carbon adsorption tower 12 for preliminary adsorption of pollutants, and then enters the catalytic decomposition box 13. The gas distribution plate 24 in the box makes the flue gas evenly contact the honeycomb catalyst carrier 25. The metal oxide catalyst on the surface of the carrier completely decomposes the residual pollutants at a suitable temperature maintained by the electric heating jacket 27. Finally, the qualified tail gas is discharged through the tail gas emission pipe 14 at the bottom of the catalytic decomposition box 13.

[0026] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A fly ash pyrolysis structure for the harmless treatment of fly ash from waste incineration, comprising a fly ash storage bin (1), a pyrolysis chamber (2), and a quench tower (3), characterized in that, A double-screw metering conveyor (4) is fixedly installed on one side of the bottom of the fly ash storage silo (1). A water washing tank (5) is fixedly installed on one side of the double-screw metering conveyor (4). A dryer (6) is fixedly installed on one side of the water washing tank (5). Multiple pyrolysis chambers (2) are fixedly installed on one side of the dryer (6). A conveying pipe (7) is fixedly installed between the multiple pyrolysis chambers (2). A first screw conveyor (8) is provided inside each of the multiple conveying pipes (7). A cyclone separator (9) is fixedly installed on one side of one of the pyrolysis chambers (2). A bag filter (10) is fixedly installed at the gas outlet of the cyclone separator (9). A second screw conveyor (11) is fixedly installed at the fixed outlet of the bag filter (10).

2. The fly ash pyrolysis structure for the harmless treatment of waste incineration fly ash according to claim 1, characterized in that, A quench tower (3) is fixedly installed at the gas outlet of the bag filter (10). An activated carbon adsorption tower (12) is fixedly installed on one side of the quench tower (3). A catalytic decomposition box (13) is fixedly installed at the bottom of the activated carbon adsorption tower (12). A tail gas emission pipe (14) is fixedly installed at the bottom of the catalytic decomposition box (13).

3. The fly ash pyrolysis structure for the harmless treatment of waste incineration fly ash according to claim 1, characterized in that, A solid product bin (15) is fixedly installed on one side of the second screw conveyor (11), a liquid product collection tank (16) is fixedly installed at the condensate outlet of the quench tower (3), a reflux pipe (17) is fixedly installed at the solid outlet of the cyclone separator (9), and the feed end of the pyrolysis chamber (2) is fixedly installed at the other end of the reflux pipe (17).

4. The fly ash pyrolysis structure for the harmless treatment of fly ash from waste incineration according to claim 1, characterized in that, Each of the multiple pyrolysis chambers (2) is fixedly equipped with a motor (18) at its top. The output ends of the multiple motors (18) extend into the interior of the multiple pyrolysis chambers (2) and are fixedly installed with hollow spiral shafts (19). Multiple stirring blades (20) are fixedly installed on the surface of the multiple hollow spiral shafts (19). Multiple heating zones (21) are provided inside the multiple pyrolysis chambers (2).

5. The fly ash pyrolysis structure for the harmless treatment of fly ash from waste incineration according to claim 1, characterized in that, An ultrasonic generator (22) is fixedly installed on the bottom inner side of the washing tank (5), and multiple spray pipes (23) are fixedly installed inside the washing tank (5).

6. The fly ash pyrolysis structure for the harmless treatment of waste incineration fly ash according to claim 2, characterized in that, The catalytic decomposition chamber (13) is equipped with a gas distribution plate (24), a honeycomb catalyst carrier (25) and a temperature sensor (26). The honeycomb catalyst carrier (25) is provided with a metal oxide catalyst on its surface, and the catalytic decomposition chamber (13) is provided with an electric heating jacket (27) on its outer side.

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