CN219924049U - Waste gas treatment device of pickling tank - Google Patents

Abstract

The utility model discloses an exhaust gas treatment device of a pickling tank, which comprises a pickling room and the pickling tank arranged in the pickling room, wherein a first fan is arranged on one side in the pickling room above the pickling tank, an air suction cover is arranged on the other side in the pickling room, the air suction cover is communicated with the lower part of an alkaline washing tower through a first communicating pipe, the top of the alkaline washing tower is communicated with one side of a primary active carbon adsorption box through a second communicating pipe, the other side of the primary active carbon adsorption box is communicated with one side of a secondary active carbon adsorption box, the other side of the secondary active carbon adsorption box is communicated with an air suction inlet of the second fan through a third communicating pipe, and an air outlet of the second fan is communicated with a discharge pipe. According to the utility model, through the mutual matching of the first fan, the air suction cover, the alkaline washing tower, the primary active carbon adsorption box and the secondary active carbon adsorption box, the waste gas collection efficiency is optimized, the efficient purification of waste gas is realized, and the waste gas treatment effect is improved.

Description

Waste gas treatment device of pickling tank

Technical Field

The utility model relates to the technical field of waste gas treatment of pickling tanks, in particular to a waste gas treatment device of a pickling tank.

Background

In the society of industry high-speed development, people are to the requirement of product performance increase gradually, lead to product production technology to need to promote constantly and high efficiency, in the product pickling passivation stage, from traditional pickling tank gradually to detachable, can multi-functional, the pickling device of multiple mode equipment, have all had very big promotion and progress in scale, form, molding.

However, in the aspect of waste gas collection and treatment of the pickling tank, a lot of defects still exist, and in the aspect of front-end waste gas collection, the collection area of the pickling room is large, if integral sealing collection is adopted, the continuity of product production can be affected, and the production safety of workshops is not met; in the aspect of rear-end waste gas treatment equipment, waste gas is treated only through an alkaline washing tower, so that the emission is easy to reach the standard, and secondary atmospheric environmental pollution is caused.

Accordingly, the applicant has proposed an exhaust gas treatment device for an acid wash tank having high purification efficiency.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide an exhaust gas treatment device of an acid pickling tank.

The utility model adopts the following technical scheme to realize the aim:

the utility model provides an exhaust treatment device of pickling tank, includes the pickling tank that is equipped with in pickling tank and the pickling tank, is located one side is installed in the pickling tank of pickling tank top, the suction hood is installed to the opposite side in the pickling tank, the suction hood is linked together with the lower part of alkaline wash tower through first communicating pipe, the top of alkaline wash tower is linked together with one side of one-level active carbon adsorption case through the second communicating pipe, the opposite side of one-level active carbon adsorption case is linked together with one side of second level active carbon adsorption case, the second level active carbon adsorption case opposite side is linked together with the inlet scoop of second fan through the third communicating pipe, the air outlet and the blow off pipe of second fan are linked together.

Further, the alkaline washing tower is including seting up at the air inlet of alkaline washing tower lower part and seting up the gas vent at alkaline washing tower top, from upwards being equipped with aqua storage tank, packing layer, spray assembly and defogging layer down in the alkaline washing tower in proper order, aqua storage tank one side lower part is connected with dosing assembly through the wet return, circulating water pump is installed at dosing assembly top, circulating water pump's water inlet is connected with dosing assembly through the wet suction, circulating water pump's delivery port is connected with spray assembly through circulating water pipe.

Further, the packing layer includes first packing layer and second packing layer, spray the subassembly and spray with the second grade including one-level, one-level sprays the top of locating first packing layer, is located the below on second packing layer, the second grade sprays the top of locating second packing layer, is located the below on defogging layer.

Further, the primary spraying is the same as the secondary spraying in structure, and comprises a spraying main pipe, a spraying branch pipe and a nozzle, wherein the spraying main pipe is arranged at the center of the alkaline washing tower, one end of the spraying main pipe is connected with the inner wall of the alkaline washing tower, the other end of the spraying main pipe extends out of the alkaline washing tower and is connected with the circulating water pipe, the two sides of the spraying main pipe are provided with symmetrically arranged spraying branch pipes, the spraying branch pipes are provided with a plurality of spraying branch pipes, one end of each spraying branch pipe is communicated with the spraying main pipe, the other end of each spraying branch pipe is connected with the inner wall of the alkaline washing tower, and the nozzle is arranged on the spraying main pipe and the spraying branch pipe.

Further, the nozzles are uniformly distributed along concentric circles concentric with the inner wall of the alkaline washing tower, and the concentric circles are uniformly distributed along the radial direction of the alkaline washing tower.

Further, the dosing assembly comprises a reaction kettle connected with a water return pipe, a dosing box is arranged on one side of the reaction kettle and connected with the reaction kettle through a dosing pipe, a water inlet pipe is arranged on one side of the top of the reaction kettle, a circulating water pump is arranged at the top of the reaction kettle, and a water inlet of the circulating water pump is connected with the reaction kettle through a water suction pipe.

Further, the first-stage activated carbon adsorption box and the second-stage activated carbon adsorption box are identical in structure, a first partition plate, a second partition plate and a third partition plate are longitudinally arranged in the first-stage activated carbon adsorption box and the second-stage activated carbon adsorption box from left to right in sequence, a plurality of supporting blocks are respectively arranged between the first partition plate and the second partition plate and between the second partition plate and the third partition plate, a drawer is slidably arranged on the supporting blocks, a handle is arranged on the drawer, and an activated carbon layer is placed in the drawer.

Further, a first through hole is formed in a first partition plate between the upper drawer and the lower drawer, a plurality of second through holes are formed in a second partition plate, and third through holes are formed in the upper portion and the lower portion of the third partition plate.

Further, sliding blocks are arranged on two sides of the drawer, sliding grooves are formed between the first partition plate and the second partition plate and between the second partition plate and the third partition plate, and the sliding grooves are in sliding fit with the sliding blocks.

Further, the bottom of the drawer is provided with a through hole which is penetrated, and a supporting net is arranged in the through hole.

Compared with the prior art, the utility model provides an exhaust gas treatment device of a pickling tank, which comprises the following components

The beneficial effects are that:

according to the utility model, the front-end waste gas collection is combined with the side-blowing method and the side-suction method, so that the waste gas collection efficiency is improved; through arranging an alkaline washing tower, the waste gas fully reacts with water and alkali liquor to purify the waste gas; through setting up one-level active carbon adsorption case and second grade active carbon adsorption case, filter waste gas, adopt the second grade to adsorb mainly to improve the purification efficiency to waste gas and improve active carbon life cycle, and accord with the environmental protection requirement, avoid discharging and not reach standard, cause secondary environmental pollution to the atmosphere, finally discharge through the exhaust pipe up to standard, the utility model has optimized waste gas collection efficiency, realized the high-efficient purification to waste gas, improved the exhaust treatment effect.

Drawings

FIG. 1 is a schematic view of the overall structure of the present utility model;

FIG. 2 is a schematic side view of the internal structure of the caustic tower of the present utility model;

FIG. 3 is a schematic view of the spray assembly of the present utility model;

FIG. 4 is a schematic view showing the internal structure of the primary activated carbon adsorption tank of the present utility model.

The mark in the figure is 1, pickling room; 2. a pickling tank; 3. a first fan; 4. an air suction cover; 5. a first communication pipe; 6. an alkaline washing tower; 61. an air inlet; 62. an exhaust port; 63. a water storage tank; 64. a filler layer; 641. a first filler layer; 642. a second filler layer; 65. an observation window; 66. a spray assembly; 661. primary spraying; 662. second-stage spraying; 663. a spraying main pipe; 664. a spray branch pipe; 665. a nozzle; 67. a defogging layer; 68. a dosing assembly; 681. a reaction kettle; 682. a dosing box; 683. a dosing tube; 684. a water inlet pipe; 7. a second communicating pipe; 8. a first-stage activated carbon adsorption box; 81. a first separator; 811. a first port; 82. a second separator; 821. a second port; 83. a third separator; 831. a third port; 84. a support block; 85. a drawer; 86. a handle; 87. an activated carbon layer; 88. a support net; 9. a secondary activated carbon adsorption tank; 10. a third communicating pipe; 11. a second fan; 12. a discharge pipe; 13. a water outlet; 14. a chute; 15. a slide block; 16. a water return pipe; 17. a circulating water pump; 18. a water suction pipe; 19. and a circulating water pipe.

Detailed Description

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

standard parts used in the utility model can be purchased from the market, special-shaped parts can be customized according to the description of the specification and the drawings, the specific connection modes of all parts adopt conventional means such as mature bolts, rivets and welding in the prior art, the machinery, the parts and the equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection modes in the prior art, so that the details are not described.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "longitudinal", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying positive importance.

It should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The embodiment of the utility model provides an exhaust gas treatment device of a pickling tank, referring to fig. 1, comprising a pickling room 1 and a pickling tank 2 arranged in the pickling room 1, wherein a first fan 3 is arranged at one side in the pickling room 1 above the pickling tank 2 to accelerate the collection efficiency of exhaust gas, preferably, the first fan 3 can adopt an axial flow fan, which is the prior art and is not described in excessive detail herein, an air suction cover 4 is arranged at the other side in the pickling room 1, a detachable filter screen is arranged in the air suction cover 4 to block dust particles in exhaust gas and avoid influencing the subsequent exhaust gas treatment, the air suction cover 4 is communicated with the lower part of an alkaline washing tower 6 through a first communication pipe 5, and the alkaline washing tower 6 is arranged, make waste gas and water, alkali lye fully react, purify waste gas, the top of alkaline tower 6 is linked together with one side of one-level active carbon adsorption case 8 through second communicating pipe 7, the opposite side of one-level active carbon adsorption case 8 is linked together with one side of second grade active carbon adsorption case 9, adopts the second grade to adsorb mainly to improve the purification efficiency to waste gas and improve active carbon life cycle, second grade active carbon adsorption case 9 opposite side is linked together with the inlet scoop of second fan 11 through third communicating pipe 10, and preferably, second fan 11 can adopt centrifugal fan, and this is prior art, does not do too much in this and repeating the description, the air outlet of second fan 11 is linked together with discharge pipe 12, and discharge pipe 12 can be the chimney.

The first fan 3 and the suction cover 4 are made of anti-corrosion materials, and the bracket of the first fan 3 and the bracket of the suction cover 4 are subjected to anti-corrosion treatment in advance.

Referring to fig. 2, in this embodiment, the alkaline washing tower 6 includes an air inlet 61 formed at the lower part of the alkaline washing tower 6 and an air outlet 62 formed at the top of the alkaline washing tower 6, the air inlet 61 is communicated with the first communicating pipe 5, the air outlet 62 is communicated with the second communicating pipe 7, a water storage tank 63, a filler layer 64, a spray assembly 66 and a demisting layer 67 are sequentially formed in the alkaline washing tower 6 from bottom to top, mist in the waste gas is removed by arranging the demisting layer 67, one side lower part of the water storage tank 63 is connected with a dosing assembly 68 through a water return pipe 16, the water storage tank 63 is used for storing circulating water, a valve is formed on the water return pipe 16, alkaline solutions with different concentrations can be configured according to the acidity of the waste gas, so that the alkaline washing effect of the alkaline washing tower 6 is optimal, a circulating water pump 17 is mounted at the top of the dosing assembly 68, a water inlet of the circulating water pump 17 is connected with the dosing assembly 68 through a water suction pipe 18, and a water outlet of the circulating water pump 17 is connected with the spray assembly 66 through a circulating water pipe 19.

The water outlet 13 is provided at one side of the lower part of the water storage tank 63, and a pH meter (not shown in the figure) is installed on the outer wall of one side of the water storage tank 63, the acid waste gas and the alkali liquor are subjected to neutralization reaction to generate salts, and when the salt concentration is high, salt crystals are generated, so that when the pH value of the circulating water exceeds a certain range, the circulating water is discharged through the water outlet 13, and the influence of the salt crystals on the waste gas treatment is avoided.

The alkaline washing tower 6 is provided with a pH detector (not shown) for detecting the exhaust gas, and is capable of detecting the pH value of the exhaust gas.

The outer wall of the alkaline washing tower 6 is provided with a plurality of observation windows 65, so that the condition in the alkaline washing tower 6 can be observed conveniently.

Referring to fig. 2, in this embodiment, the packing layer 64 includes a first packing layer 641 and a second packing layer 642, grid plates are disposed below the first packing layer 641 and the second packing layer 642, the grid plates can uniformly distribute gas and slow down the rising speed of the gas, so as to improve the treatment effect of the packing layer 64, the spraying assembly 66 includes a first spraying 661 and a second spraying 662, the first spraying 661 is disposed above the first packing layer 641 and below the second packing layer 642, the second spraying 662 is disposed above the second packing layer 642 and below the mist removing layer 67, and two layers of packing layers 64 and two spraying layers are disposed in the alkaline washing tower 6, so as to further improve the purification effect.

Referring to fig. 2 and 3, in this embodiment, the first-level spraying 661 has the same structure as the second-level spraying 662, and includes a spraying main pipe 663, a spraying branch pipe 664 and a nozzle 665, where the spraying main pipe 663 is disposed at the center of the alkaline washing tower 6, one end is connected with the inner wall of the alkaline washing tower 6, the other end extends out of the alkaline washing tower 6 and is connected with the circulating water pipe 19, two sides of the spraying main pipe 663 are provided with symmetrically arranged spraying branch pipes 664, one end of the spraying branch pipe 664 is communicated with the spraying main pipe 663, the other end is connected with the inner wall of the alkaline washing tower 6, and the nozzle 665 is disposed on the spraying main pipe 663 and the spraying branch pipe 664, so that the spraying component 66 has a firm structure.

Referring to fig. 3, in this embodiment, the nozzles 665 are uniformly arranged along concentric circles concentric with the inner wall of the alkaline tower 6, and each concentric circle is uniformly arranged along the radial direction of the alkaline tower 6, so that the nozzles 665 are uniformly distributed to optimize the spraying effect.

Referring to fig. 2, in this embodiment, the dosing assembly 68 includes a reaction kettle 681 connected to the water return pipe 16, a dosing tank 682 is disposed on one side of the reaction kettle 681, an alkaline solution is disposed in the dosing tank 682, the dosing tank 682 is connected to the reaction kettle 681 through a dosing pipe 683, a valve is disposed on the dosing pipe 683, a water inlet pipe 684 is disposed on one side of the top of the reaction kettle 681, a valve is disposed on the water inlet pipe 684, water can be provided for the reaction kettle 681, a water circulating pump 17 is disposed on the top of the reaction kettle 681, and a water inlet of the water circulating pump 17 is connected to the reaction kettle 681 through a water suction pipe 18.

Referring to fig. 4, in this embodiment, the first-stage activated carbon adsorption box 8 and the second-stage activated carbon adsorption box 9 have the same structure, a first partition 81, a second partition 82 and a third partition 83 are sequentially and longitudinally arranged in the first-stage activated carbon adsorption box 8 and the second-stage activated carbon adsorption box 9 from left to right, a plurality of supporting blocks 84 are respectively arranged between the first partition 81 and the second partition 82 and between the second partition 82 and the third partition 83, a drawer 85 is slidably arranged on the supporting blocks 84, a handle 86 is arranged on the drawer 85, the drawer 85 is conveniently drawn out, an activated carbon layer 87 is arranged in the drawer 85, and waste gas is filtered.

Specifically, in the present embodiment, 1 first partition plate 81, 1 second partition plate 82, 1 third partition plate 83, 4 support blocks 84 between the first partition plate 81 and the second partition plate 82, 1 drawer 85 placed on 2 support blocks 84 on the same level, 6 support blocks 84 between the second partition plate 82 and the third partition plate 83, that is, two layers of drawers 85, 2 each, and 4 drawers 85 are placed.

Referring to fig. 4, in this embodiment, a first opening 811 is formed in the first partition 81 between the upper and lower drawers 85, in this embodiment, the first opening 811 is formed in the middle of the first partition 81, a plurality of second openings 821 are formed in the second partition 82, and third openings 831 are formed in the upper and lower portions of the third partition 83.

Referring to fig. 4, in the present embodiment, exhaust gas enters between the upper and lower drawers 85 from the first through-hole 811 in the middle of the first partition plate 81, passes to the rear activated carbon layer 87 through the second through-hole 821 in the second partition plate 82, passes through the upper and lower activated carbon layers 87 from the middle, and finally is discharged from the third through-holes 831 in the upper and lower parts of the third partition plate 83.

Referring to fig. 4, in this embodiment, the sliding blocks 15 are disposed on two sides of the drawer 85, and sliding grooves 14 are disposed between the first partition board 81 and the second partition board 82 and between the second partition board 82 and the third partition board 83, and the sliding grooves 14 are slidably matched with the sliding blocks 15, so that the drawer 85 is conveniently drawn out, and the activated carbon layer 87 is replaced.

Referring to fig. 4, in this embodiment, the bottom of the drawer 85 is provided with a through hole, a supporting net 88 is installed in the through hole to support the activated carbon layer 87, and the drawer 85 is provided with a sealing strip to facilitate the circulation of the waste gas, so as to avoid the waste gas overflowing from the slit and pollute the environment.

In this embodiment, a control system is further provided, and the control system is electrically connected to the first fan 3, the second fan 11, the circulating water pump 17, and the dosing assembly 68.

Working principle: when the pickling tank 2 reacts to generate waste gas, the first fan 3 and the second fan 11 are started, so that the pickling room 1 is in a negative pressure state, the collection efficiency of the waste gas is accelerated, the waste gas enters the suction hood 4 from the lower part of the alkaline washing tower 6 through the first communication pipe 5, the waste gas sequentially passes through the first packing layer 641, the first-stage spraying 661, the second packing layer 642, the second-stage spraying 662 and the demisting layer 67, the circulating water pump 17 is started, water and alkali liquor in the reaction kettle 681 are conveyed into the first-stage spraying 661 and the second-stage spraying 662, the waste gas is uniformly distributed through the first packing layer 641, the rising speed of the waste gas is slowed down, the waste gas continuously rises, the alkali liquor and the water sprayed in the first-stage spraying 661 are subjected to neutralization reaction, the waste gas is primarily purified, the waste gas is subjected to secondary treatment through the second packing layer 642 and the secondary spraying 662, the treatment effect is ensured, finally, the waste gas passes through the mist removing layer 67, the mist in the waste gas is removed, then the waste gas without the water mist enters the primary activated carbon adsorption box 8, the waste gas enters between the upper drawer 85 and the lower drawer 85 from the first through hole 811 in the middle of the first partition plate 81, is transmitted to the rear activated carbon layer 87 through the second through hole 821 in the second partition plate 82, passes through the upper and lower activated carbon layers 87 from the middle, is finally discharged from the third through holes 831 in the upper and lower parts of the third partition plate 83, then enters the secondary activated carbon adsorption box 9, the purification efficiency of the waste gas is improved, the service period of the activated carbon is prolonged, and finally, the waste gas reaches the standard through the discharge pipe 12;

during spraying, the control system controls the flow of the water inlet pipe 684 and the dosing tank 682 through the detection value, and the alkali liquor proportion in the reaction kettle 681 is set to optimize the spraying effect, and the alkali liquor prepared in the reaction kettle 681 is sent into the spraying assembly 66 through the circulating water pipe 19 for recycling.

When activated carbon layer 87 is saturated, drawer 85 can be pulled out by handle 86 to replace activated carbon layer 87.

What is not described in detail in this specification is prior art known to those skilled in the art.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the scope of the present utility model. It will be apparent that the described embodiments are merely some, but not all, embodiments of the utility model. Based on these embodiments, all other embodiments that may be obtained by one of ordinary skill in the art without inventive effort are within the scope of the utility model. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art may still combine, add or delete features of the embodiments of the present utility model or make other adjustments according to circumstances without any conflict, so as to obtain different technical solutions without substantially departing from the spirit of the present utility model, which also falls within the scope of the present utility model.

Claims (10)

1. The utility model provides an exhaust treatment device of pickling bath, includes pickling bath (1) and pickling bath (2) that are equipped with in pickling bath (1), its characterized in that is located one side is installed in pickling bath (1) of pickling bath (2) top first fan (3), suction hood (4) are installed to opposite side in pickling bath (1), suction hood (4) are linked together with the lower part of alkaline wash tower (6) through first communicating pipe (5), the top of alkaline wash tower (6) is linked together with one side of one-level active carbon adsorption case (8) through second communicating pipe (7), the opposite side of one-level active carbon adsorption case (8) is linked together with one side of second active carbon adsorption case (9), the opposite side of second active carbon adsorption case (9) is linked together with the inlet scoop of second fan (11) through third communicating pipe (10), the air outlet and the exhaust pipe (12) of second fan (11) are linked together.

2. The waste gas treatment device of an acid washing tank according to claim 1, wherein the alkaline washing tower (6) comprises an air inlet (61) formed in the lower portion of the alkaline washing tower (6) and an air outlet (62) formed in the top of the alkaline washing tower (6), a water storage tank (63), a packing layer (64), a spraying assembly (66) and a demisting layer (67) are sequentially arranged in the alkaline washing tower (6) from bottom to top, the lower portion of one side of the water storage tank (63) is connected with a dosing assembly (68) through a water return pipe (16), a circulating water pump (17) is mounted at the top of the dosing assembly (68), a water inlet of the circulating water pump (17) is connected with the dosing assembly (68) through a water suction pipe (18), and a water outlet of the circulating water pump (17) is connected with the spraying assembly (66) through a circulating water pipe (19).

3. The exhaust gas treatment device of a pickling tank according to claim 2, wherein the packing layer (64) comprises a first packing layer (641) and a second packing layer (642), the spray assembly (66) comprises a primary spray (661) and a secondary spray (662), the primary spray (661) is arranged above the first packing layer (641) and below the second packing layer (642), and the secondary spray (662) is arranged above the second packing layer (642) and below the mist removing layer (67).

4. The waste gas treatment device of a pickling tank according to claim 3, wherein the primary spraying (661) and the secondary spraying (662) have the same structure and comprise a spraying main pipe (663), a spraying branch pipe (664) and a nozzle (665), the spraying main pipe (663) is arranged at the center of the alkaline washing tower (6), one end of the spraying main pipe is connected with the inner wall of the alkaline washing tower (6), the other end of the spraying main pipe extends out of the alkaline washing tower (6) and is connected with the circulating water pipe (19), the spraying branch pipes (664) which are symmetrically arranged are arranged on two sides of the spraying main pipe (663), the spraying branch pipes (664) are provided with a plurality of spraying branch pipes, one end of each spraying branch pipe (664) is communicated with the spraying main pipe (663), the other end of each spraying branch pipe is connected with the inner wall of the alkaline washing tower (6), and the nozzle (665) is arranged on the spraying main pipe (663) and the spraying branch pipe (664).

5. The exhaust gas treatment device of the pickling tank according to claim 4, wherein the nozzles (665) are uniformly arranged on concentric circles concentric with the inner wall of the alkaline tower (6), and each concentric circle is uniformly arranged along the radial direction of the alkaline tower (6).

6. The waste gas treatment device of a pickling tank according to claim 5, wherein the dosing assembly (68) comprises a reaction kettle (681) connected with a water return pipe (16), a dosing tank (682) is arranged on one side of the reaction kettle (681), the dosing tank (682) is connected with the reaction kettle (681) through a dosing pipe (683), a water inlet pipe (684) is arranged on one side of the top of the reaction kettle (681), a circulating water pump (17) is arranged on the top of the reaction kettle (681), and a water inlet of the circulating water pump (17) is connected with the reaction kettle (681) through a water suction pipe (18).

7. The waste gas treatment device of an acid washing tank according to claim 1, wherein the primary activated carbon adsorption box (8) and the secondary activated carbon adsorption box (9) have the same structure, a first partition board (81), a second partition board (82) and a third partition board (83) are longitudinally arranged in the primary activated carbon adsorption box (8) and the secondary activated carbon adsorption box (9) from left to right in sequence, a plurality of supporting blocks (84) are respectively arranged between the first partition board (81) and the second partition board (82) and between the second partition board (82) and the third partition board (83), a drawer (85) is slidably arranged on the supporting blocks (84), a handle (86) is arranged on the drawer (85), and an activated carbon layer (87) is arranged in the drawer (85).

8. The exhaust gas treatment device of the pickling tank according to claim 7, wherein a first through hole (811) is formed in a first partition plate (81) located between an upper drawer (85) and a lower drawer (85), a plurality of second through holes (821) are formed in a second partition plate (82), and a third through hole (831) is formed in each of the upper portion and the lower portion of the third partition plate (83).

9. The waste gas treatment device of the pickling tank according to claim 8, wherein sliding blocks (15) are arranged on two sides of the drawer (85), sliding grooves (14) are formed between the first partition plate (81) and the second partition plate (82) and between the second partition plate (82) and the third partition plate (83), and the sliding grooves (14) are in sliding fit with the sliding blocks (15).

10. The waste gas treatment device of the pickling tank according to claim 9, wherein a through hole is formed in the bottom of the drawer (85), and a supporting net (88) is installed in the through hole.