Waste catalyst dry distillation pyrolysis tail gas purification device

Abstract

The utility model relates to the technical field of flue gas treatment, and discloses a waste catalyst dry distillation pyrolysis tail gas purification device which comprises a dry reaction device, the dry reaction device comprises an inner pipe, and a mixing assembly is arranged on the inner wall of the inner pipe. According to the waste catalyst dry distillation and pyrolysis tail gas purification device, the spray gun pushes activated carbon, slaked lime powder and flue gas to spirally flow upwards, mixing of the activated carbon, the slaked lime powder and the flue gas is promoted, then the flue gas and powder mixture passes through the fan blades and pushes the fan blades to rotate, and stronger vortex and turbulent flow can be formed through rotation of the fan blades; the activated carbon, the slaked lime powder and the flue gas can be more uniformly mixed, the flue gas deacidification reaction efficiency is improved, rising flue gas collides with falling flue gas, the motion trail complexity of the flue gas and powder particles is increased, the powder particles continuously roll and suspend in airflow, the contact efficiency of gas and solid is remarkably improved, and the deacidification reaction efficiency of the flue gas is improved. The purpose of removing the acid gas is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of flue gas treatment, specifically to a waste catalyst dry distillation pyrolysis tail gas purification device. BACKGROUND

[0002] The flue gas generated after the incineration treatment of hazardous waste contains a large amount of complex polluting components that need to be purified, and can only be discharged into the atmosphere after meeting the standards. The existing hazardous waste incineration disposal system is generally divided into incineration system, quenching system, flue gas purification system, etc. The flue gas generated by incineration needs to be purified to meet the requirements before being discharged. Compared with the flue gas generated by solid combustion such as garbage incineration and coal-fired power plants, the content of sulfur and chlorine in the flue gas generated by hazardous waste combustion is higher, so special design is needed in process selection.

[0003] According to the new dry reactor (publication number: CN216358929U) announced, the above-mentioned application includes a reactor body, the reactor body includes an inner tube arranged vertically and an outer tube arranged at the top of the inner tube, the outer tube is arranged at the top of the inner tube, the outer tube includes a coincident part coincident with the inner tube at the top of the inner tube and a connecting part arranged vertically with the coincident part, and the top of the inner tube and the top of the outer tube are communicated.

[0004] However, the above-mentioned dry reactor in the actual use process, only by changing the gas flow rate to promote the mixing of flue gas and dry deacidification agent, and the gas flow along the fixed direction flows, and maintains the stable laminar flow state, this flow mode cannot provide enough power for the mixing between flue gas and dry deacidification agent to carry out effective mixing, under the laminar flow condition, the relative movement of gas molecules and deacidification agent particles is very limited, resulting in low mixing efficiency between gas flow and particles; In view of this, we propose a waste catalyst dry distillation pyrolysis tail gas purification device. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a waste catalyst dry distillation pyrolysis tail gas purification device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a waste catalyst dry distillation pyrolysis tail gas purification device, including a cracking furnace, the output end of the cracking furnace is fixedly connected with a second combustion chamber through a fixed connection pipeline, the output end of the second combustion chamber is fixedly connected with a semi-dry quenching device, the output end of the semi-dry quenching device is fixedly connected with a dry reaction device, the dry reaction device includes a venturi tube, the bottom end of the venturi tube is fixedly connected with the semi-dry quenching device, the top end face of the venturi tube is fixedly connected with an inner tube, the inner wall of the inner tube is provided with a mixing assembly, the mixing assembly includes:

[0007] The spray gun is fixedly connected to the side wall of the Venturi tube, the output end of the spray gun is arranged in the inner tube, the inner wall of the inner tube is fixedly connected with a vertical rod, and the side wall of the vertical rod is rotatably connected with a fan blade;

[0008] The inner wall of the inner tube is fixedly connected with a horizontal rod, one end of the horizontal rod away from the inner wall of the inner tube is fixedly connected with a flow distribution plate, the bottom end surface of the flow distribution plate is fixedly connected with an inclined plate, and the top end surface of the inclined plate is provided with a notch.

[0009] The side wall of the inner tube is provided with a communication notch, and the side wall of the dry reaction device is fixedly connected with a connecting portion.

[0010] Preferably, the inner wall of the inner tube is fixedly connected with a triangular ring, and the triangular ring is located below the inclined plate.

[0011] Preferably, the inclined plate and the inner wall of the inner tube have a gap, the height of the cross section of the triangular ring is greater than the width of the gap, the activated carbon and the lime powder cannot be accumulated in the included angle formed by the inclined plate and the inner wall of the inner tube, the triangular ring guides the powder and the airflow, the airflow cannot be blown upward through the gap, and the powder falling downward is blown upward again.

[0012] Preferably, the communication notch is located in the inner portion of the connecting portion, a plurality of groups of the communication notches are arranged at the outer wall of the inner tube at equal intervals.

[0013] Preferably, a plurality of groups of the spray guns are arranged in a spiral shape, the output ends of the spray guns are arranged in the inner portion of the inner tube in an inclined manner, and the activated carbon and the lime powder sprayed from the spray guns are sprayed into the inner portion of the inner tube in an inclined manner.

[0014] Preferably, the connecting portion is fixedly connected with the pulse bag-type dust collector, the output end of the pulse bag-type dust collector is fixedly connected with a flue gas reheater, the flue gas reheater is fixedly connected with a lye spray washing tower and a chimney, the lye spray washing tower is fixedly connected with a clean water spray washing tower, the semi-dry quenching device is fixedly connected with a lye tank through a pipeline, the lye spray washing tower is fixedly connected with a washing and adsorption circulating pool through a pipeline, and the clean water spray washing tower is fixedly connected with a clean water washing circulating pool through a pipeline.

[0015] Compared with the prior art, the waste catalyst dry distillation pyrolysis tail gas purification device has the following beneficial effects:

[0016] 1. The waste catalyst dry distillation pyrolysis tail gas purification device, through the setting fan blade, flow divider and inclined plate, the spray gun promotes the spiral upward flow of activated carbon, lime powder and flue gas, promotes the mixing of activated carbon, lime powder and flue gas, then the flue gas powder mixture passes through the fan blade, the fan blade is pushed to rotate, the rotation of the fan blade forms stronger vortex and turbulent flow, so that activated carbon, lime powder and flue gas can be more uniformly mixed, the efficiency of flue gas deacidification reaction is improved, the rising flue gas collides with the descending flue gas, turbulent flow and vortex phenomenon are generated, the complexity of the movement track of flue gas and powder particles is increased, so that the powder particles are constantly rolling and suspended in the airflow, the contact efficiency of gas and solid is significantly improved, and then the reaction rate is improved, so that the purpose of removing acid gas is achieved.

[0017] 2. The waste catalyst dry distillation pyrolysis tail gas purification device, through the setting of the triangular ring, the triangular ring guides the powder and airflow, the airflow cannot blow upward through the gap, and the downward falling powder is blown upward again, the powder is prevented from directly falling and depositing at the bottom of the inner tube, the powder is guided by the triangular ring and is re-rolled into the rising airflow, the suspension time of the powder in the reaction area is prolonged, and the powder and flue gas have more sufficient contact and reaction opportunities. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The flow chart of the utility model;

[0019] Figure 2 The structure schematic diagram of the dry reactor of the utility model;

[0020] Figure 3 The structure schematic diagram of the dry reactor of the utility model;

[0021] Figure 4 The structure schematic diagram of the flow divider of the utility model;

[0022] Figure 5 The structure schematic diagram of the utility model Figure 4 The structure schematic diagram of the A area of the utility model.

[0023] In the drawing: 1, cracking furnace; 2, secondary combustion chamber; 3, semi-dry quenching device; 4, dry reaction device; 401, venturi tube; 402, mixing assembly; 4021, spray gun; 4022, vertical rod; 4023, fan blade; 4024, horizontal rod; 4025, flow divider; 4026, inclined plate; 4027, communication notch; 403, connecting part; 404, triangular ring; 5, pulse bag filter; 6, flue gas reheater; 7, lye spray washing tower; 8, clean water spray washing tower; 9, chimney; 10, lye tank; 11, washing and adsorption circulating pool; 12, clean water washing circulating pool. DETAILED DESCRIPTION

[0024] As Figures 1-5 The utility model provides a technical scheme: a waste catalyst dry distillation pyrolysis tail gas purification device, including the pyrolysis furnace 1, the output of pyrolysis furnace 1 is fixedly connected with two combustion chambers 2 through fixed connection pipeline, the output of two combustion chambers 2 is fixedly connected with half dry type quenching device 3, the output of half dry type quenching device 3 is fixedly connected with dry type reaction unit 4, and dry type reaction unit 4 includes venturi 401, and the bottom end of venturi 401 is fixedly connected with half dry type quenching device 3, and the top end surface of venturi 401 is fixedly connected with inner tube, and the inner wall of inner tube is provided with mixing assembly 402, and mixing assembly 402 includes spray gun 4021, vertical rod 4022, fan blade 4023, cross bar 4024, flow divider 4025, oblique plate 4026 and communication notch 4027.

[0025] In an embodiment of the utility model, spray gun 4021 is fixedly connected on the lateral wall of venturi 401, the output end of spray gun 4021 is arranged in the inner portion of inner tube, the number of spray gun 4021 is arranged with several groups, several groups of spray gun 4021 are arranged spirally, the output end of spray gun 4021 is arranged obliquely in the inner portion of inner tube, the activated carbon and lime powder sprayed in spray gun 4021 are sprayed obliquely into the inner portion of inner tube, the inner top surface of inner tube is fixedly connected with vertical rod 4022, and the lateral wall of vertical rod 4022 is rotatably connected with fan blade 4023.

[0026] The inner wall of inner tube is fixedly connected with cross bar 4024, one end of cross bar 4024 away from the inner wall of inner tube is fixedly connected with flow divider 4025, the bottom end surface of flow divider 4025 is fixedly connected with oblique plate 4026, the top end surface of oblique plate 4026 is provided with notch, and there is a gap between oblique plate 4026 and the inner wall of inner tube, and activated carbon and lime powder cannot be accumulated in the included angle formed by oblique plate 4026 and the inner wall of inner tube.

[0027] The lateral wall of inner tube is provided with communication notch 4027, the lateral wall of dry type reaction unit 4 is fixedly connected with connecting portion 403, the communication notch 4027 is located in the inner portion of connecting portion 403, the number of communication notch 4027 is arranged with several groups, and several groups of communication notch 4027 are arranged at equal intervals on the outer wall of inner tube.

[0028] Connecting portion 403 is fixedly connected with pulse bag filter 5, the output end of pulse bag filter 5 is fixedly connected with flue gas reheater 6, flue gas reheater 6 is fixedly connected with lye spray washing tower 7 and chimney 9, lye spray washing tower 7 is fixedly connected with clean water spray washing tower 8, half dry type quenching device 3 is fixedly connected with lye tank 10 through pipeline, lye spray washing tower 7 is fixedly connected with washing and adsorption circulating pool 11 through pipeline, and clean water spray washing tower 8 is fixedly connected with clean water washing circulating pool 12 through pipeline.

[0029] The flue gas generated by the cracking furnace 1 enters the secondary combustion chamber 2 through a pipeline, the secondary combustion chamber 2 fully burns the combustible gas and solid powder in the flue gas, and the flue gas after secondary combustion is discharged into the semi-dry quenching device 3. The water pump sprays the alkaline solution in the alkaline solution tank 10 onto the flue gas, thereby reducing the temperature of the flue gas and neutralizing the acidic components in the flue gas. Subsequently, the flue gas enters the dry reaction device 4, and the activated carbon and lime powder are sent into the inner tube through the quantitative feeding device, and the harmful substances in the flue gas are adsorbed and reacted. When the flue gas enters the pulse bag dust collector 5, the unreacted activated carbon and lime powder are adsorbed on the surface of the bag, continue to adsorb harmful substances and react with the residual acidic gas in the flue gas. The treated flue gas is heated again by the flue gas reheater 6, and then is sequentially drawn into the spray washing tower and the clean water spray washing tower 8 for desulfurization and deacidification and removal of alkaline aerosols. The flue gas is heated again by the flue gas reheater 6, and finally is discharged through the chimney 9.

[0030] In the dry reaction device 4, the Venturi tube 401 accelerates the speed of the flue gas passing through due to the shortened diameter. The activated carbon and lime powder flue gas passing device and the lance 4021 are sent into the inner tube. The activated carbon, lime powder and flue gas flow upward in a spiral shape, promoting the mixing of the activated carbon, lime powder and flue gas. Then the flue gas powder mixture passes through the fan blade 4023, pushing the fan blade 4023 to rotate. The rotation of the fan blade 4023 forms stronger vortex and turbulence, so that the activated carbon, lime powder and flue gas can be more uniformly mixed, improving the efficiency of flue gas deacidification reaction, facilitating the full contact and reaction of flue gas and lime powder, and further improving the use efficiency of deacidification agent and reducing the waste of lime powder.

[0031] Then the flue gas continues to move upward, part of the flue gas is guided to the top surface of the inner tube through the inclined plate 4026, and then is guided to the other side of the flow dividing plate 4025, and the other part of the flue gas continues to rise directly through the slot on the inclined plate 4026. The flue gas collides with the descending flue gas, generating turbulence and vortex phenomenon, increasing the complexity of the movement trajectory of the flue gas and powder particles, making the powder particles constantly tumble and suspend in the gas flow, significantly improving the contact efficiency of the gas and the solid, and further improving the reaction rate to achieve the purpose of removing acidic gas. Then the flue gas enters the connecting part 403 through the communication slot 4027 for further treatment.

[0032] In addition, the inner wall of the inner tube is fixedly connected with a triangular ring 404, the triangular ring 404 is located below the inclined plate 4026, the height of the cross section of the triangular ring 404 is greater than the width of the gap between the inclined plate 4026 and the inner wall of the inner tube, the triangular ring 404 guides the powder and the airflow, the airflow cannot blow upward through the gap, and the powder falling downward is blown upward again, the powder is prevented from directly falling and depositing at the bottom of the inner tube, the powder is re-rolled into the rising airflow under the guiding effect of the triangular ring 404, the suspension time of the powder in the reaction area is prolonged, the powder and the flue gas have more sufficient contact and reaction opportunities, and the reaction rate is further improved.

[0033] In the utility model, when in use, the activated carbon and the lime powder flue gas pass through the feeding device and the spray gun 4021 gas to enter the inside of the inner tube, the activated carbon and the lime powder are mixed in the inside of the inner tube, the flue gas powder mixture drives the fan blade 4023 to rotate, the flue gas continues to move upward, part of the flue gas reaches the top surface of the inner tube through the guide of the inclined plate 4026, and then is guided to the other side of the flow distribution plate 4025, the part of the flue gas moves downward, and the other part of the flue gas continues to rise directly through the slot on the inclined plate 4026, the part of the flue gas collides with the flue gas in the falling process, and the mixing of the gas and the solid is promoted.

[0034] The utility model has been described in detail above, but some modifications or improvements can be made on the basis of the utility model, which is obvious to the general technical personnel in the technical field. Therefore, the modification or improvement without departing from the spirit of the utility model is within the protection scope of the utility model.

Claims

1. A waste catalyst dry distillation pyrolysis tail gas purification device, comprising a pyrolysis furnace (1), wherein the output end of the pyrolysis furnace (1) is fixedly connected to a secondary combustion chamber (2) via a fixed connecting pipe, the output end of the secondary combustion chamber (2) is fixedly connected to a semi-dry quenching device (3), and the output end of the semi-dry quenching device (3) is fixedly connected to a dry reaction device (4), characterized in that: The dry reaction device (4) includes a Venturi tube (401), the bottom end of the Venturi tube (401) is fixedly connected with the semi-dry quenching device (3), the top end surface of the Venturi tube (401) is fixedly connected with an inner tube, the inner wall of the inner tube is provided with a mixing assembly (402), the mixing assembly (402) includes: A spray gun (4021) is fixedly connected to the side wall of the Venturi tube (401), the output end of the spray gun (4021) is arranged in the inner tube, the inner wall of the inner tube is fixedly connected with a vertical rod (4022), the side wall of the vertical rod (4022) is rotatably connected with a fan blade (4023); A flow divider (4025) is fixedly connected to the inner wall of the inner tube, one end of the horizontal rod (4024) away from the inner wall of the inner tube is fixedly connected with the flow divider (4025), the bottom end surface of the flow divider (4025) is fixedly connected with an inclined plate (4026), the top end surface of the inclined plate (4026) is provided with a notch; A communication notch (4027) is arranged in the side wall of the inner tube, the side wall of the dry reaction device (4) is fixedly connected with a connecting part (403).

2. The waste catalyst dry distillation pyrolysis tail gas purification device according to claim 1, characterized in that: The inner wall of the inner tube is fixedly connected with a triangular ring (404), the triangular ring (404) is located below the inclined plate (4026).

3. The waste catalyst dry distillation pyrolysis tail gas purification device according to claim 2, characterized in that: The inclined plate (4026) and the inner wall of the inner tube have a gap, the height of the cross section of the triangular ring (404) is greater than the width of the gap.

4. The waste catalyst dry distillation pyrolysis tail gas purification device according to claim 1, characterized in that: The communication notch (4027) is located in the inner part of the connecting part (403), the number of the communication notch (4027) is provided with several groups, and the several groups of the communication notch (4027) are arranged at equal intervals on the outer wall of the inner tube.

5. The waste catalyst dry distillation pyrolysis tail gas purification device according to claim 1, characterized in that: The number of the spray gun (4021) is provided with several groups, and the several groups of the spray gun (4021) are arranged in a spiral shape, and the output end of the spray gun (4021) is arranged in the inner tube in an inclined manner.

6. The waste catalyst dry distillation pyrolysis tail gas purification device according to claim 1, characterized in that: The connecting part (403) is fixedly connected with the pulse cloth bag dust collector (5), the output end of the pulse cloth bag dust collector (5) is fixedly connected with a flue gas reheater (6), the flue gas reheater (6) is fixedly connected with a lye spray washing tower (7) and a chimney (9), the lye spray washing tower (7) is fixedly connected with a clean water spray washing tower (8), the semi-dry quenching device (3) is fixedly connected with a lye tank (10) through a pipeline, the lye spray washing tower (7) is fixedly connected with a washing and adsorption circulating pool (11) through a pipeline, and the clean water spray washing tower (8) is fixedly connected with a clean water washing circulating pool (12) through a pipeline.

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