Waste gas treatment system of calcining furnace

Abstract

The invention discloses a waste gas treatment system of a calcining furnace, and aims to reduce the cost by adopting a connecting pipe made of a PP material, prolong the service life of the connecting pipe by improving a gas inlet of the connecting pipe, and avoid the situation that the connecting pipe is deformed when waste gas is directly introduced into the connecting pipe. According to the technical scheme, the waste gas treatment system of the calcining furnace comprises the calcining furnace, a box body, a waste gas treatment module, a connecting pipe and a heat dissipation pipe, a gap is formed in the box body, and the gap is communicated with the interior of the box body and the outside atmosphere; the connecting pipe is made of a PP material, one end of the connecting pipe is located in the box body, the other end of the connecting pipe is communicated with the waste gas treatment module, and a gas inlet is formed in the end, located in the box body, of the connecting pipe; one end of the heat dissipation pipe is communicated with a waste gas outlet of the calcining furnace, and the other end of the heat dissipation pipe extends into the box body and is inserted into the gas inlet; belongs to the technical field of waste gas treatment.

Description

Technical Field

[0001] This invention belongs to the field of waste gas treatment technology, and more specifically, relates to a waste gas treatment system for a calcining furnace. Background Technology

[0002] A calcining furnace is a common high-temperature processing equipment used in iron smelting, rare metal recovery, and specialty chemical production, powered by natural gas, oil, or electricity. It is widely used in metallurgy, steel, and chemical industries. In the recovery and purification of precious metals on a production line, the calcination section requires the calcination and reduction of precious metal chlorides to generate precious metals. Calcination produces a large amount of gas, which contains corrosive NH3 and HCl. These gases need to be treated before being emitted. For example, CN202410423910.4 discloses a system for treating ammonium chloride fumes, including an alkaline spray device, an electrostatic precipitator, and a recovery pipeline. The alkaline spray device and the electrostatic precipitator are connected through the recovery pipeline and are arranged sequentially along the direction of waste gas flow.

[0003] However, in existing technologies, because the exhaust gas discharged from the calcining furnace is at a high temperature and is corrosive, stainless steel pipes are used to connect the exhaust gas outlet of the calcining furnace to the subsequent exhaust gas treatment device. However, using stainless steel pipes increases costs. Summary of the Invention

[0004] The main objective of this invention is to provide a waste gas treatment system for a calcining furnace, which aims to reduce costs by using PP material connecting pipes, extend the life of connecting pipes by improving the air inlet of the connecting pipes, and avoid deformation of the connecting pipes caused by the direct introduction of waste gas into the connecting pipes.

[0005] According to a first aspect of the present invention, a waste gas treatment system for a calcining furnace is provided, comprising a calcining furnace, a housing, a waste gas treatment module, a connecting pipe and a heat dissipation pipe, wherein the housing is provided with a gap that connects the interior of the housing with the outside atmosphere;

[0006] The connecting pipe is made of PP material. One end of the connecting pipe is located inside the box, and the other end of the connecting pipe is connected to the exhaust gas treatment module. An air inlet is provided at the end of the connecting pipe inside the box.

[0007] One end of the heat dissipation pipe is connected to the exhaust gas outlet of the calcining furnace, and the other end of the heat dissipation pipe extends into the box and is inserted into the air inlet.

[0008] In the exhaust gas treatment system of the calcining furnace described above, the connecting pipe includes a vertical section and an inclined section; the lower end of the vertical section is located inside the box, the upper end of the inclined section is connected to the upper end of the vertical section, the lower end of the inclined section is connected to the exhaust gas treatment module, and the air inlet is located at the lower end of the vertical section.

[0009] In the above-mentioned exhaust gas treatment system of the calcining furnace, multiple first nozzles with downward-facing output ends are provided in the inclined section, and the multiple first nozzles are arranged at intervals along the length of the inclined section.

[0010] The exhaust gas treatment system also includes a first pipe, multiple first nozzles are connected to the first pipe, the first pipe connects the first nozzles and an external alkaline solution supply mechanism, and a first drain pipe is provided at the lower end of the vertical section.

[0011] In the above-mentioned exhaust gas treatment system of the calcining furnace, the exhaust gas treatment system also includes a first cylinder and a second cylinder in the shape of a frustum. Both the first cylinder and the second cylinder are hollow structures, and the axis of the first cylinder and the axis of the second cylinder are both arranged vertically. The second cylinder is connected to the lower end of the first cylinder.

[0012] The first cylinder gradually contracts away from the second cylinder, and the second cylinder gradually contracts away from the first cylinder.

[0013] The upper end of the first cylinder is provided with an air inlet pipe, which is connected to the lower end of the inclined section. The air inlet pipe is provided with a second nozzle with the output end facing downward. The second nozzle is connected to an external alkali supply mechanism through a second pipe.

[0014] The lower end of the second cylinder is equipped with an exhaust pipe, which is connected to the waste gas treatment module.

[0015] In the above-mentioned exhaust gas treatment system for the calcining furnace, the exhaust gas treatment module includes a first spray tower, a second spray tower, an electrostatic precipitator, and a fan.

[0016] The air outlet pipe is connected to the air inlet port of the first spray tower. The air outlet port of the first spray tower is connected to the air inlet port of the second spray tower through the first pipeline. The air outlet port of the second spray tower is connected to the air inlet interface of the electrostatic precipitator through the second pipeline. The discharge port of the electrostatic precipitator is connected to the fan through the third pipeline.

[0017] Both the first and second pipes are connected to the circulating water pipe of the first spray tower.

[0018] In the exhaust gas treatment system of the aforementioned calcining furnace, the heat dissipation pipes are made of PTFE.

[0019] In the exhaust gas treatment system of the calcining furnace mentioned above, the first and second pipes are both made of PPR material, while the inlet pipe, the first cylinder, the second cylinder, the outlet pipe, the first pipeline, the second pipeline, and the third pipeline are all made of PP material.

[0020] In the above-mentioned exhaust gas treatment system for the calcining furnace, the exhaust gas treatment system also includes a frame, the bottom of which is equipped with multiple casters, and the box is located on the top of the frame;

[0021] The tank is connected to a water inlet pipe, and an openable door is installed on one side of the tank, forming a gap between the door and the tank; a second drain pipe is provided at the bottom of the tank.

[0022] In the above-mentioned exhaust gas treatment system for the calcining furnace, there are two exhaust gas outlets for the calcining furnace. The heat dissipation pipes correspond one-to-one with the exhaust gas outlets of the calcining furnace, and the air inlets correspond one-to-one with the heat dissipation pipes.

[0023] In the above-mentioned exhaust gas treatment system of the calcining furnace, the electrostatic precipitator includes a shell, an anode wire and an adsorption tube, with two discharge ports located at the top of the shell, and an air inlet on one side of the bottom of the shell.

[0024] The interior of the shell is divided into two chambers by a partition, and the chambers are connected to and correspond one-to-one with the discharge port; a nozzle and an insulator are fixed in the chamber, with the nozzle located above the insulator;

[0025] The adsorption tube is fixed inside the chamber, the anode wire is connected to the insulator, and the anode wire is located in the adsorption tube;

[0026] The bottom of the chamber is equipped with a pull-out ash hopper, and a pump body is also provided on one side of the shell. The pump body is equipped with an inlet pipe and an outlet pipe. The inlet pipe is connected to the ash hopper, and the outlet pipe is connected to an external waste liquid storage tank.

[0027] The outlet of the second spray tower is connected to the inlet through the second pipeline, and the third pipeline has two branch pipes, which correspond one-to-one with the discharge port and are connected to the discharge port.

[0028] One of the above-described technical solutions of the present invention has at least one of the following advantages or beneficial effects:

[0029] In this invention, a heat dissipation pipe is first connected to the exhaust gas outlet of the calcining furnace, and the heat dissipation pipe is connected to a PP material connecting pipe. In this way, when the exhaust gas is discharged, it is first cooled by heat exchange through the heat dissipation pipe before being introduced into the connecting pipe, thus avoiding direct contact between the exhaust gas and the connecting pipe. Moreover, the heat dissipation pipe is inserted into the connecting pipe, so the air in the box enters from the gap between the heat dissipation pipe and the air inlet and is carried into the connecting pipe, where it mixes with the exhaust gas in the connecting pipe to further cool the exhaust gas.

[0030] The inventors reduced costs by using PP material for the connecting pipe. Furthermore, due to the high temperature of the exhaust gas discharged from the calcining furnace, improvements were made to the air inlet of the connecting pipe to extend its lifespan and prevent deformation caused by direct exhaust gas flow. In addition, the leaked exhaust gas can crystallize inside the chamber to form precipitates, reducing the leakage of exhaust gas and thus preventing pollution of the external environment. Attached Figure Description

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0032] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the structure of the box body according to the first embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the electrostatic dust removal device according to the first embodiment of the present invention;

[0035] The figure labels for each figure are as follows:

[0036] 1. Calcining furnace; 2. Housing; 21. Door; 22. Water inlet pipe; 23. Second drain pipe; 24. Frame; 241. Casters; 3. Waste gas treatment module; 31. First spray tower; 32. Second spray tower; 33. Electrostatic precipitator; 331. Shell; 3311. Discharge port; 3312. Air inlet; 3313. Chamber; 332. Partition; 333. Nozzle; 334. Insulator; 335. Anode wire; 336. Adsorption tube; 337. Pump Body; 3371, Liquid inlet pipe; 338, Ash hopper; 34, Fan; 4, Connecting pipe; 41, Vertical section; 411, First drain pipe; 42, Inclined section; 43, First nozzle; 44, First pipeline; 45, Air inlet; 5, First cylinder; 51, Air inlet pipe; 511, Second nozzle; 6, Second cylinder; 61, Air outlet pipe; 7, Second pipeline; 8, First pipeline; 9, Second pipeline; 101, Third pipeline; 1011, Branch pipe; 102, Heat dissipation pipe. Detailed Implementation

[0037] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0038] The following disclosure provides many different implementations or examples for different ways of implementing the present invention.

[0039] Reference Figures 1 to 3 As shown, a waste gas treatment system for a calcining furnace includes a calcining furnace 1, a housing 2, a waste gas treatment module 3, a connecting pipe 4, and a heat dissipation pipe 102. The housing 2 has a gap (not shown in the figure) that connects the interior of the housing 2 to the outside atmosphere.

[0040] The connecting pipe 4 is made of PP material. One end of the connecting pipe 4 is located inside the housing 2, and the other end of the connecting pipe 4 is connected to the exhaust gas treatment module 3. The end of the connecting pipe 4 located inside the housing 2 is provided with an air inlet 45.

[0041] One end of the heat dissipation pipe 102 is connected to the exhaust gas outlet of the calcining furnace 1, and the other end of the heat dissipation pipe 102 extends into the box 2 and is inserted into the air inlet 45.

[0042] It should be noted that the temperature of the exhaust gas discharged from the exhaust port of the calcining furnace 1 is around 100℃, while the temperature resistance of the PP material connecting pipe 4 is usually around 70℃.

[0043] In this design, the calcining furnace 1 calcines the material to decompose the precious metal ammonium chloride salt. The generated waste gas is discharged from the waste gas outlet of the calcining furnace 1. The waste gas first enters the heat dissipation pipe 102 for preliminary cooling. Before the waste gas enters the PP material connecting pipe 4, it passes through the heat dissipation pipe 102 for transition. After the waste gas in the heat dissipation pipe 102 is slightly cooled, it enters the air inlet 45 of the connecting pipe 4. The heat dissipation pipe 102 is inserted into the air inlet 45 of the connecting pipe. There is a gap between the heat dissipation pipe 102 and the air inlet 45. Air in the housing 2 is carried into the connecting pipe 4 through the gap and mixes with the waste gas. Then, this waste gas mixed with air is transported to the waste gas treatment module 3 for treatment and then discharged. In this way, the cost is reduced, the life of the PP material connecting pipe 4 is extended, and the deformation of the connecting pipe 4 is avoided when the waste gas is directly introduced into the connecting pipe 4.

[0044] In this embodiment, the exhaust gas treatment system also includes a frame 24, the bottom of which is provided with a plurality of casters 241, and the housing 2 is located on the top of the frame 24.

[0045] A water inlet pipe 22 is connected to the box body 2, and an openable door 21 is installed on one side of the box body 2, forming a gap between the door 21 and the box body 2; a second drain pipe 23 is provided at the bottom of the box body 2.

[0046] The connecting pipe 4 includes a vertical section 41 and an inclined section 42; the lower end of the vertical section 41 is located inside the housing 2, the upper end of the inclined section 42 is connected to the upper end of the vertical section 41, the lower end of the inclined section 42 is connected to the exhaust gas treatment module 3, and the air inlet 45 is located at the lower end of the vertical section 41.

[0047] Multiple first nozzles 43 with their output ends facing downwards are provided inside the inclined section 42, and the multiple first nozzles 43 are arranged at intervals along the length direction of the inclined section 42.

[0048] The exhaust gas treatment system also includes a first pipe 44, and multiple first nozzles 43 are connected to the first pipe 44. The first pipe 44 connects the first nozzles 43 and an external alkaline solution supply mechanism. The lower end of the vertical section 41 is provided with a first drain pipe 411.

[0049] Implicitly, valves are installed on the water inlet pipe 22, the first drain pipe 411, and the second drain pipe 23.

[0050] Generally, ambient air enters the interior of the housing 2 through the gap between the door 21 and the housing 2. This air enters through the gap between the heat dissipation pipe 102 and the air inlet 45 and is carried into the connecting pipe 4 to mix with the exhaust gas and cool it down. Generally, some exhaust gas will leak into the interior of the housing 2. The leaked exhaust gas will crystallize and form precipitates when it cools inside the housing 2. In this way, workers can pass water through the water inlet pipe 22 to clean the interior of the housing 2.

[0051] The first nozzle 43 is set in the inclined section 42 to initially neutralize the HCl in the exhaust gas. In order to prevent the exhaust gas from cooling and crystallizing, which would cause the inclined section 42 to become blocked, the crystals that are cooled and crystallized can slide down the inclined surface.

[0052] When the first nozzle 43 sprays out the alkali solution, some of the alkali solution will flow into the vertical section 41. The worker can drain this alkali solution into the interior of the tank 2 by opening the valve of the first drain pipe 411. The liquid that flows into the tank 2 can be drained by opening the valve on the second drain pipe 23.

[0053] Preferably, the exhaust gas treatment system further includes a frustum-shaped first cylinder 5 and a second cylinder 6, both of which are hollow structures, and the axes of the first cylinder 5 and the second cylinder 6 are both vertically arranged, with the second cylinder 6 connected to the lower end of the first cylinder 5.

[0054] The first cylinder 5 gradually contracts away from the second cylinder 6, and the second cylinder 6 gradually contracts away from the first cylinder 5.

[0055] The upper end of the first cylinder 5 is provided with an air inlet pipe 51, which is connected to the lower end of the inclined section 42. The air inlet pipe 51 is provided with a second nozzle 511 with the output end facing downward. The second nozzle 511 is connected to an external alkaline solution supply mechanism through a second pipe 7.

[0056] The lower end of the second cylinder 6 is provided with an exhaust pipe 61, which is connected to the waste gas treatment module 3.

[0057] Specifically, the alkaline solution sprayed from the second nozzle 511 is also used for preliminary treatment of the waste gas. During the process of spraying the alkaline solution from the second nozzle 511, a Venturi effect is formed to accelerate the flow rate of the waste gas, thereby accelerating the mixing and dissolution of the alkaline solution and the waste gas.

[0058] Preferably, the exhaust gas treatment module 3 includes a first spray tower 31, a second spray tower 32, an electrostatic dust removal device 33, and a fan 34;

[0059] The air outlet pipe 61 is connected to the air inlet port of the first spray tower 31. The air outlet port of the first spray tower 31 is connected to the air inlet port of the second spray tower 32 through the first pipe 8. The air outlet port of the second spray tower 32 is connected to the air inlet interface 3312 of the electrostatic dust removal device 33 through the second pipe 9. The discharge port 3311 of the electrostatic dust removal device 33 is connected to the fan 34 through the third pipe 101.

[0060] Both the first pipe 44 and the second pipe 7 are connected to the circulating water pipe of the first spray tower 31.

[0061] The first spray tower 31 and the second spray tower 32 have the same structure and are both existing technologies. For reference, please refer to Chinese patent CN223570404U. Therefore, the structure of the first spray tower 31 and the second spray tower 32 will not be described in detail in this embodiment.

[0062] Furthermore, the exhaust gas passes through the vertical section 41, the inclined section 42, the inlet pipe 51, the first cylinder 5, the second cylinder 6 and the outlet pipe 61 before entering the first spray tower 31 to neutralize HCl by spraying alkaline solution. Then it goes to the second spray tower 32 to neutralize HCl again, and then to the electrostatic precipitator 33 to remove dust from the exhaust gas before being discharged by the fan 34.

[0063] In practical applications, the heat dissipation pipe 102 is made of PTFE. PTFE pipes are corrosion-resistant and high-temperature resistant. Generally, the length of the heat dissipation pipe 102 is 1 meter. The exhaust gas exchanges heat with the outside environment inside the heat dissipation pipe 102 to initially cool the exhaust gas.

[0064] In practical applications, the first pipe 44 and the second pipe 7 are both made of PPR material, while the inlet pipe 51, the first cylinder 5, the second cylinder 6, the outlet pipe 61, the first pipe 8, the second pipe 9, and the third pipe 101 are all made of PP material. The use of both PPR and PP materials is also to reduce costs.

[0065] In this embodiment, the calcining furnace 1 has two exhaust gas outlets, with each heat dissipation pipe 102 corresponding to one of the exhaust gas outlets of the calcining furnace 1, and each air inlet 45 corresponding to one of the heat dissipation pipes 102. This can speed up the efficiency of exhaust gas treatment.

[0066] Preferably, the electrostatic dust removal device 33 includes a housing 331, an anode wire 335 and an adsorption tube 336, two discharge ports 3311 are provided on the top of the housing 331, and an air inlet 3312 is provided on one side of the bottom of the housing 331.

[0067] The interior of the housing 331 is divided into two chambers 3313 by a partition 332. The chambers 3313 are connected to and correspond one-to-one with the discharge port 3311. A nozzle 333 and an insulator 334 are fixedly installed in the chamber 3313, with the nozzle 333 located above the insulator 334.

[0068] The adsorption tube 336 is fixed inside the chamber 3313, the anode wire 335 is connected to the insulator 334, and the anode wire 335 is located in the adsorption tube 336;

[0069] The bottom of the chamber 3313 is provided with a pull-out ash hopper 338, and a pump body 337 is also provided on one side of the shell 331. The pump body 337 is provided with an inlet pipe 3371 and an outlet pipe (not shown in the figure). The inlet pipe 3371 is connected to the ash hopper 338, and the outlet pipe is connected to an external waste liquid storage tank.

[0070] The outlet port of the second spray tower 32 is connected to the inlet port 3312 through the second pipeline 9. The third pipeline 101 is provided with two branch pipes 1011, which correspond one-to-one with the outlet 3311 and are connected to the outlet 3311.

[0071] Implicitly, valves are installed on both branch pipes 1011.

[0072] Generally, the anode wire 335 and the adsorption tube 336 can be made of carbon fiber. The anode wire 335 is connected to the anode of the power supply of the external device, and the adsorption tube 336 is connected to the negative terminal of the power supply of the external device. The anode wire 335 and the adsorption tube 336 form an electric field to adsorb and remove dust. Then, the liquid is sprayed out through the nozzle 333 to wash the particles into the ash hopper 338. Then, the waste liquid is pumped to the waste liquid storage tank of the external device for storage through the pump body 337.

[0073] The partition 332 divides the interior of the housing 331 into two chambers 3313. The two branch pipes 1011 correspond one-to-one with and are connected to the discharge port 3311 at the top of the housing 331. When the nozzle 333 of one of the chambers 3313 needs to be sprayed with liquid for rinsing, the valve on the corresponding branch pipe 1011 can be closed. At this time, the exhaust gas after electrostatic dust removal is discharged from the other discharge port 3311, thereby realizing the independent operation and alternating cleaning of the two chambers 3313.

[0074] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A waste gas treatment system for a calcining furnace, characterized in that, It includes a calcining furnace, a housing, a waste gas treatment module, connecting pipes and heat dissipation pipes. The housing has a gap that connects the interior of the housing to the outside atmosphere. The connecting pipe is made of PP material. One end of the connecting pipe is located inside the box, and the other end of the connecting pipe is connected to the exhaust gas treatment module. An air inlet is provided at the end of the connecting pipe located inside the box. One end of the heat dissipation pipe is connected to the exhaust gas outlet of the calcining furnace, and the other end of the heat dissipation pipe extends into the box body and is inserted into the air inlet.

2. The waste gas treatment system for the calcining furnace according to claim 1, characterized in that, The connecting pipe includes a vertical section and an inclined section; the lower end of the vertical section is located inside the box, the upper end of the inclined section is connected to the upper end of the vertical section, the lower end of the inclined section is connected to the exhaust gas treatment module, and the air inlet is located at the lower end of the vertical section.

3. The waste gas treatment system for a calcining furnace according to claim 2, characterized in that, The inclined section is provided with a plurality of first nozzles with their output ends facing downwards, and the plurality of first nozzles are arranged at intervals along the length direction of the inclined section. The waste gas treatment system also includes a first pipe, and a plurality of first nozzles are connected to the first pipe. The first pipe connects the first nozzles to an external alkaline solution supply mechanism, and a first drain pipe is provided at the lower end of the vertical section.

4. The waste gas treatment system for a calcining furnace according to claim 3, characterized in that, The exhaust gas treatment system also includes a first cylinder and a second cylinder in the shape of a frustum. Both the first cylinder and the second cylinder are hollow structures, and the axes of the first cylinder and the second cylinder are both arranged vertically. The second cylinder is connected to the lower end of the first cylinder. The first cylinder gradually contracts in a direction away from the second cylinder, and the second cylinder gradually contracts in a direction away from the first cylinder; The upper end of the first cylinder is provided with an air inlet pipe, which is connected to the lower end of the inclined section. The air inlet pipe is provided with a second nozzle with the output end facing downward. The second nozzle is connected to an external alkali supply mechanism through a second pipe. The lower end of the second cylinder is provided with an exhaust pipe, which is connected to the waste gas treatment module.

5. The waste gas treatment system for a calcining furnace according to claim 4, characterized in that, The waste gas treatment module includes a first spray tower, a second spray tower, an electrostatic precipitator, and a fan; The air outlet pipe is connected to the air inlet port of the first spray tower, the air outlet port of the first spray tower is connected to the air inlet port of the second spray tower through the first pipeline, the air outlet port of the second spray tower is connected to the air inlet interface of the electrostatic precipitator through the second pipeline, and the discharge port of the electrostatic precipitator is connected to the fan through the third pipeline. Both the first pipe and the second pipe are connected to the circulating water pipe of the first spray tower.

6. The waste gas treatment system for a calcining furnace according to claim 1, characterized in that, The heat dissipation pipe is a PTFE pipe.

7. The waste gas treatment system for a calcining furnace according to claim 5, characterized in that, The first and second pipes are both made of PPR material, while the air inlet pipe, the first cylinder, the second cylinder, the air outlet pipe, the first pipeline, the second pipeline, and the third pipeline are all made of PP material.

8. The waste gas treatment system for a calcining furnace according to claim 3, characterized in that, The exhaust gas treatment system also includes a frame, the bottom of which is equipped with multiple casters, and the housing is located on the top of the frame; A water inlet pipe is connected to the box body, and an openable door is installed on one side of the box body, forming a gap between the door and the box body; a second drain pipe is provided at the bottom of the box body.

9. The waste gas treatment system for a calcining furnace according to claim 5, characterized in that, The calcining furnace has two exhaust gas outlets, and the heat dissipation pipes correspond one-to-one with the exhaust gas outlets of the calcining furnace, and the air inlets correspond one-to-one with the heat dissipation pipes.

10. The waste gas treatment system for a calcining furnace according to claim 5, characterized in that, The electrostatic precipitator includes a housing, an anode wire, and an adsorption tube. There are two discharge ports located on the top of the housing, and the air inlet is located on one side of the bottom of the housing. The interior of the housing is divided into two chambers by a partition, and the chambers are connected to and correspond one-to-one with the discharge port; a nozzle and an insulator are fixed in the chamber, with the nozzle located above the insulator; The adsorption tube is fixed in the chamber, the anode wire is connected to the insulator, and the anode wire is located in the adsorption tube; The bottom of the chamber is provided with a pull-out ash hopper, and a pump body is also provided on one side of the shell. The pump body is provided with an inlet pipe and an outlet pipe. The inlet pipe is connected to the ash hopper, and the outlet pipe is connected to an external waste liquid storage tank. The air outlet of the second spray tower is connected to the air inlet through the second pipeline. The third pipeline is provided with two branch pipes, which correspond one-to-one with the discharge port and are connected to the discharge port.

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