Dust-containing waste gas multi-stage treatment device

Abstract

The utility model discloses a multi-stage treatment device for dust-containing waste gas. The multi-stage treatment device comprises a treatment box, a mounting plate, a filter plate I, a filter plate II, a spraying mechanism, a stirring mechanism, a cleaning mechanism and an activated carbon plate, two groups of mounting plates are mounted in the treatment box, one group of mounting plates is positioned at one end of the air inlet, and the other group of mounting plates is positioned at one end of the air outlet; the filter plate I is rotationally mounted on the mounting plate at one end of the air inlet, and the filter plate II is rotationally mounted on the mounting plate at one end of the air outlet; the spraying mechanism is installed at the top of the treatment box, the stirring mechanism is installed in the treatment box, the two cleaning mechanisms are installed between the filter plate I and the filter plate II in a mirroring mode, and the activated carbon plate is installed on one side of the filter plate II through an installation groove in the top of the treatment box. The waste gas treatment effect is improved through the spraying mechanism and the stirring mechanism; and the filter plate I and the filter plate II are cleaned in real time through the cleaning mechanism, so that efficient treatment of waste gas dust is realized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to dust-containing waste gas treatment technical field, especially related to a dust-containing waste gas multistage treatment device. BACKGROUND

[0002] In the dust-containing waste gas treatment related technical field, the related waste gas treatment equipment on the market currently when treating the dust in waste gas, when spraying and dust setting of the dust in waste gas, the fusion time of the dust in waste gas and water is short, and the dust in waste water cannot be fully settled, thereby increasing the plugging probability of the filtering mechanism, and it is difficult to meet the efficient and continuous industrial production demand;

[0003] After searching, the prior art announcement No. CN219481989U dust-containing industrial waste gas filtering treatment device, including the processing box, the processing box inside movable mounting two filter plates, the top of each filter plate is rotatably installed T type transfer rod, the bottom of each T type transfer rod is fixedly installed taper gear, the both sides of each filter plate are provided with third recess; when the filter plate filters the dust in waste gas, the dust in waste gas is not treated by dust setting, and the dust-containing waste gas directly impacts the surface of the filter plate, so that the large particle dust is intercepted by the filter hole without pre-settling, which increases the plugging probability of the filter plate, and the filter plate needs to be frequently disassembled and cleaned, thereby increasing the maintenance cost, and it is difficult to meet the long-term stable treatment demand of high-concentration dust-containing waste gas;

[0004] Further search, the prior art announcement No. CN222468432U waste gas treatment device for hardware fitting processing, including processing equipment main body, the top of processing equipment main body is fixedly provided with fixed cover one, the inside of fixed cover one is fixedly provided with cutting mechanism, the inner wall of fixed cover one is fixedly provided with fixed cover two, the inner wall of fixed cover two is fixedly provided with filter screen one;When the filter screen one filters the dust in waste gas, although the dust in waste gas is treated by dust setting, but due to the too fast flow rate of waste gas, the fusion time of the dust in waste gas and water is short, and the dust in waste water cannot be fully settled, so that the plugging probability of the filter screen increases, and the filter screen needs to be frequently disassembled and cleaned, thereby increasing the maintenance cost, and it is difficult to meet the long-term stable treatment demand of high-concentration dust-containing waste gas. SUMMARY

[0005] The utility model discloses a dust-containing waste gas multistage treatment device, which improves the treatment effect of waste gas through the spraying mechanism and the stirring mechanism, realizes efficient treatment of waste gas dust through the cleaning mechanism for real-time cleaning of the filter plate I and the filter plate II, and realizes multistage filtering treatment through the filter plate I and the filter plate II for filtering the dust in waste gas.

[0006] In order to realize the above-mentioned purpose, the utility model adopts the technical scheme of:

[0007] The dust-containing waste gas multistage treatment device comprises a treatment box, mounting plates, filter plates I and II, a spraying mechanism, a stirring mechanism, a cleaning mechanism and an activated carbon plate.

[0008] The spraying mechanism comprises a water bucket, a water pump, connecting pipes, spraying pipes, an electric push rod, a connecting plate I, a gear ring and a rack.

[0009] The stirring mechanism comprises stirring blades, an electric motor I, a rotating shaft, a fixed plate I, a scraper I, a bidirectional reciprocating screw and sliding rings.

[0010] The cleaning mechanism comprises a motor II, a reciprocating screw rod, a sliding rod, a scraper II, a through slot, a brush and a fixed plate II, the fixed plate II is mirror-imaged and is provided with two groups of fixed plates II respectively installed between the filter plate I and the filter plate II, the scraper II is installed on one side of the fixed plate II, the cleaning end of the scraper II is attached to the filter plate I and the filter plate II, the through slot is arranged on the scraper II, the brush is slidably installed in the through slot, and the brush can clean the scraper II, the filter plate I and the filter plate II.

[0011] The middle part of the rotating shaft is designed to be disconnected, the connecting plate II is arranged at the connecting position of the middle part of the rotating shaft, and the connecting plate II is fixedly connected through bolts and nuts.

[0012] The middle part of the bidirectional reciprocating screw rod is designed to be inserted, and the middle part of the bidirectional reciprocating screw rod is fixedly connected through a pin shaft.

[0013] The utility model discloses compared with prior art has the beneficial effects of:

[0014] 1) the dust in waste gas is filtered through the filter plate I, the filter plate II and the activated carbon plate, multi-stage filtration treatment is realized, the fine dust and different characteristic pollutants in waste gas are fully purified, and strict environmental protection emission requirements are met.

[0015] 2) the electric push rod telescopic end drives the rack to move through the connecting plate I, and then drives the gear ring to rotate, so that the spraying pipe swings in the treatment box, the spraying angle is adjusted, the purification liquid is fan-shaped to the waste gas, the contact range of the sprayed waste gas and the purification liquid is expanded, the fine dust and part of the soluble pollutants in the waste gas are settled, the burden of the subsequent filtration, adsorption and other purification links is reduced, and efficient waste gas treatment is guaranteed.

[0016] 3) the motor I drives the rotating shaft to rotate, the rotating shaft rotates and drives the filter plate I and the filter plate II to rotate at the same time, the cleaning end of the scraper II is attached to the surfaces of the filter plate I and the filter plate II, the dust on the surfaces of the filter plate I and the filter plate II is cleaned in real time by the scraper II when the filter plate I and the filter plate II rotate, and the filtration efficiency of the filter plate I and the filter plate II is guaranteed, the motor II drives the reciprocating screw rod to rotate, the brush moves along the sliding rod to make reciprocating linear motion, the scraper II is cleaned, and the accumulation of sundries on the scraper II is prevented from affecting the cleaning effect, with the reciprocating motion of the brush, the dust adhered to the surfaces of the filter plate I and the filter plate II is cleaned by the cleaning end of the brush and the scraper II, the dust on the surfaces of the filter plate I and the filter plate II is continuously removed in the waste gas treatment process, the filter plate always maintains a high-efficiency filtering state, and the efficiency is reduced due to the accumulation of dust and the blockage of pores, the motor II drives the brush to clean the scraper II, the self-cleaning of the scraper is guaranteed, the cleaning effect of the filter plate is strengthened, and stable and efficient waste gas treatment is guaranteed.

[0017] 4) When the spraying mechanism sprays the purification liquid to the dust in the waste gas to settle, the motor I output shaft drives the bevel gear to rotate, the top bevel gear of the rotating shaft rotates, and the rotating shaft rotates while driving the filter plate I and the filter plate II to rotate; at the same time, the stirring blade rotates under the driving of the rotating shaft, the sliding ring connected with the bidirectional reciprocating screw rod is reciprocated in the sliding groove I under the rotation of the stirring blade, and then the stirring blade is reciprocated in the sliding groove I under the driving of the stirring blade; the dust in the waste gas is fully mixed with the water vapor, the dust settling speed is improved, the filter plate is effectively prevented from being blocked, and the maintenance frequency is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application; Figure 1 Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application;

[0019] Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application; Figure 2 Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application; Figure 1 Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application;

[0020] Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application; Figure 3 Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application; Figure 2 Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application;

[0021] Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application; Figure 4 Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application; Figure 1 Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application; Figure 1 Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application;

[0022] Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application; Figure 5 Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application; Figure 1 Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application; Figure 2 Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application;

[0023] Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application; Figure 6 Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application; Figure 4 Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application;

[0024] Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application; Figure 7 Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application; Figure 5 Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application;

[0025] Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application; Figure 8 Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application; Figure 1 Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application;

[0026] Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application; Figure 9 Figure 1 is a structural schematic diagram of a multi-stage dust-containing waste gas treatment device according to the present application;

[0027] In the figure: 1, treatment box; 101, air inlet; 102, air outlet; 103, residue discharge port; 104, pollution discharge port; 105, mounting plate; 106, filter plate I; 107, filter plate II; 108, mounting groove; 2, spraying mechanism; 21, water bucket; 22, water pump; 23, connecting pipe; 24, spraying pipe; 25, spray head; 26, electric push rod; 27, connecting plate I; 28, gear ring; 29, rack; 210, sleeve; 3, stirring mechanism; 31, stirring blade; 32, motor I; 33, rotating shaft; 3301, sliding groove I; 3302, connecting plate II; 34, fixed plate I; 35, scraper I; 36, bidirectional reciprocating screw; 37, sliding ring; 4, cleaning mechanism; 41, motor II; 42, reciprocating screw; 43, sliding rod; 44, scraper II; 4401, through groove; 45, brush; 46, fixed plate II; 5, activated carbon plate. DETAILED DESCRIPTION

[0028] For the convenience of persons skilled in the art to understand, the following will be combined with the accompanying drawings to further illustrate the technical scheme of the present application. Figures 1-9 The technical scheme of the present application is further specifically explained.

[0029] A dust-containing waste gas multi-stage treatment device, comprising a treatment box 1, a mounting plate 105, a filter plate I 106, a filter plate II 107, a spraying mechanism 2, a stirring mechanism 3, a cleaning mechanism 4, and an activated carbon plate 5; the treatment box 1 is provided with a plurality of groups of supporting legs at the bottom, an air inlet 101 is arranged at one end of the treatment box 1, an air outlet 102 is arranged at the other end of the treatment box 1, two groups of mounting plates 105 are installed in the treatment box 1, one group of mounting plates 105 is located at one end of the air inlet 101, and the other group of mounting plates 105 is located at one end of the air outlet 102; the filter plate I 106 is rotatably installed on the mounting plate 105 located at one end of the air inlet 101, the filter plate II 107 is rotatably installed on the mounting plate 105 located at one end of the air outlet 102, a residue discharge port 103 is arranged at one side of the filter plate I 106 at the bottom of the treatment box 1, and the residue discharge port 103 is arranged between the filter plate I 106 and the filter plate II 107 at the bottom of the treatment box 1; the spraying mechanism 2 is installed at the top of the treatment box 1, the stirring mechanism 3 is installed in the treatment box 1, the cleaning mechanism 4 is mirror-imaged and arranged with two groups of cleaning mechanisms respectively installed between the filter plate I 106 and the filter plate II 107, and the activated carbon plate 5 is installed on one side of the filter plate II 107 through the mounting groove 108 at the top of the treatment box;

[0030] From the above description: the exhaust gas through the air inlet 101 into the processing box 1, first, the exhaust gas will flow through the filter plate I 106, the filter plate I 106 will be larger particles in the exhaust gas preliminary filtration, the filtered particles through the processing box 1 bottom discharge port 103 discharge; exhaust gas through the filter plate I 106, the spray mechanism 2 from the top of the processing box 1 spray cleaning liquid, the fine dust in the exhaust gas, part of the soluble pollutants are sprayed washing, so that the fine dust in the exhaust gas to settle; at this time, the stirring mechanism 3 starts, the gas in the box is stirred, so that the spray effect is better, to ensure that the exhaust gas and spray liquid contact fully; filter plate II 107 filter after spraying still remaining in the exhaust gas dust, cleaning mechanism 4 respectively on the filter plate I 106 and filter plate II 107 cleaning, to prevent dust accumulation in the filter plate I 106, filter plate II 107 surface affect the filtering effect; finally, the gas through the activated carbon plate 5, activated carbon plate 5 adsorption of odor and the remaining different characteristics of pollutants in the exhaust gas, the purified gas from the air outlet 102, activated carbon plate 5 through the installation slot 108 regularly cleaning replacement.

[0031] The spray mechanism 2 includes a bucket 21, a water pump 22, a connecting pipe 23, a spray pipe 24, an electric push rod 26, a connecting plate I 27, a gear ring 28, a rack 29; the water bucket 21 is installed on the top of the processing box 1, the water bucket 21 is connected with the connecting pipe 23 installed on the side wall of the processing box 1 through the water pump 22 installed on the top of the processing box 1, the connecting pipe 23 is provided with a sleeve 210 at both ends, the spray pipe 24 is provided with two groups and is rotatably connected with the sleeve 210 at both ends of the connecting pipe 23, the spray pipe 24 is rotatably installed on the top of the processing box 1, the spray pipe 24 is provided with a plurality of groups of spray heads 25 at the bottom, the spray pipe 24 is provided with a gear ring 28 at the connecting end of the sleeve 210, the gear ring 28 is located outside the processing box 1, the electric push rod 26 is installed at the bottom of the gear ring 28, the telescopic end of the electric push rod 26 is connected with the rack 29 at the top of the electric push rod 26 through the connecting plate I 27, the rack 29 is engaged with the gear ring 28;

[0032] From the above description: after the exhaust gas passes through the filter plate I 106, the cleaning liquid in the water bucket 21 flows to the spray pipe 24 through the water pump 22 and the connecting pipe 23, and the spray heads 25 at the bottom of the spray pipe 24 spray the cleaning liquid to the exhaust gas in the processing box 1; at this time, the telescopic end of the electric push rod 26 drives the rack 29 to move through the connecting plate I 27, and then drives the gear ring 28 to rotate, so that the spray pipe 24 swings in the processing box 1, adjusts the spray angle, makes the cleaning liquid fan-shaped to the exhaust gas, expands the contact range of the sprayed exhaust gas and the cleaning liquid, makes the fine dust and part of the soluble pollutants in the exhaust gas settle, and the settled fine dust and the cleaning liquid are discharged through the exhaust port 104 at the bottom of the processing box 1.

[0033] The stirring mechanism 3 comprises stirring blades 31, a motor I 32, a rotating shaft 33, a fixed plate I 34, a scraper I 35, a bidirectional reciprocating screw rod 36, and sliding rings 37; the filter plate I 106 is rotatably installed on the mounting plate 105 at one end of the air inlet 101, the filter plate II 107 is rotatably installed on the mounting plate 105 at one end of the air outlet 102, the rotating shaft 33 is located between the filter plate I 106 and the filter plate II 107 and is fixedly connected with the filter plate I 106 and the filter plate II 107, the top end of the rotating shaft 33 penetrates through the filter plate II 107 and is provided with a bevel gear, the motor I 32 is installed on the top of the treatment box 1, the motor I 32 is a forward and reverse motor, the output shaft of the motor I 32 penetrates into the treatment box 1 and is provided with a bevel gear, the bevel gear of the output shaft of the motor I 32 is engaged with the top end bevel gear of the rotating shaft 33, and the rotating shaft 33 is hollow and is provided with a plurality of groups of sliding grooves I 3301 in the middle part; the fixed plate I 34 is installed on one side of the top end of the rotating shaft 33, the bidirectional reciprocating screw rod 36 is rotatably installed in the rotating shaft 33 and one end of the bidirectional reciprocating screw rod 36 penetrates through the top end of the rotating shaft 33 and is fixedly connected with the fixed plate I 34; the two groups of sliding rings 37 are threadedly connected with the bidirectional reciprocating screw rod 36 in the rotating shaft 33, and the connecting end of the sliding ring 37 and the stirring blade 31 is located in the sliding groove I 3301; the end of the rotating shaft 33 penetrates through the filter plate I 106, one end of the scraper I 35 is rotatably installed at the end of the rotating shaft 33, and the other end of the scraper I 35 is fixedly connected with the outer side mounting plate 105 of the filter plate I 106.

[0034] As can be known from the above description, when the spraying mechanism 2 sprays the purification liquid to precipitate the dust in the waste gas, the output shaft of the motor I 32 drives the bevel gear to rotate, the top end bevel gear of the rotating shaft 33 rotates, and the rotating shaft 33 rotates while driving the filter plate I 106 and the filter plate II 107 to rotate; at the same time, the stirring blades 31 rotate under the driving of the rotating shaft 33, the sliding rings 37 threadedly connected with the bidirectional reciprocating screw rod 36 reciprocate in the sliding grooves I 3301 under the rotation of the stirring blades 31, thereby driving the stirring blades 31 to reciprocate in the sliding grooves I 3301; the scraper I 35 at the end of the rotating shaft 33 can clean the large particle impurities attached to the outer side of the filter plate I 106 when the filter plate I 106 rotates.

[0035] The middle part of the rotating shaft 33 is designed to be disconnected, the connecting plate II 3302 is arranged at the middle part of the rotating shaft 33, and the connecting plate II 3302 is fixedly connected through bolts and nuts;

[0036] The middle part of the bidirectional reciprocating screw rod 36 is designed to be inserted, and the middle part of the bidirectional reciprocating screw rod 36 is fixedly connected through a pin shaft;

[0037] From the above description, it can be seen that when the stirring blade 31 is installed, the rotating shaft 33 and the bidirectional reciprocating screw rod 36 are disconnected from the middle part, the stirring blade 31 is installed in the rotating shaft 33 sliding groove I 3301 from the disconnected part of the rotating shaft 33 and the bidirectional reciprocating screw rod 36 in sequence, and is screwed with the bidirectional reciprocating screw rod 36, after the installation is completed, the middle part connection of the bidirectional reciprocating screw rod 36 is fixedly connected through the pin shaft, and the connecting plate II 3302 of the disconnected part of the rotating shaft 33 is fixedly connected through the bolt and nut.

[0038] The cleaning mechanism 4 comprises a motor II 41, a reciprocating screw rod 42, a sliding rod 43, a scraper II 44, a through groove 4401, a brush 45 and a fixed plate II 46; the fixed plate II 46 is mirror image arranged with two groups of fixed plates II 46 respectively installed between the filter plate I 106 and the filter plate II 107, the scraper II 44 is installed on one side of the fixed plate II 46, and the cleaning end of the scraper II 44 is attached to the surface of the filter plate I 106 and the filter plate II 107, the through groove 4401 is arranged on the scraper II 44, the brush 45 is slidingly installed in the through groove 4401, and the brush 45 can clean the scraper II 44, the filter plate I 106 and the filter plate II; the sliding rod 43 is installed on one side of the scraper II 44, the reciprocating screw rod 42 is rotatably installed on the other side of the scraper II 44, the motor II 41 is installed at the bottom of the treatment box 1, the output shaft of the motor II 41 penetrates into the treatment box 1 and is fixedly connected with the reciprocating screw rod 42, the brush 45 is slidingly connected with the sliding rod 43 and is screwedly connected with the reciprocating screw rod 42;

[0039] From the above description, it can be seen that the motor I 32 drives the rotating shaft 33 to rotate, the rotating shaft 33 rotates at the same time to drive the filter plate I 106 and the filter plate II 107 to rotate; the cleaning end of the scraper II 44 is attached to the surface of the filter plate I 106 and the filter plate II 107, when the filter plate I 106 and the filter plate II 107 rotate, the scraper II 44 cleans the dust on the surface of the filter plate I 106 and the filter plate II 107 in real time; at the same time, the motor II 41 drives the reciprocating screw rod 42 to rotate, so that the brush 45 moves along the sliding rod 43 to make reciprocating linear motion, and the brush 45 cleans the scraper II 44; with the reciprocating motion of the brush 45, the cleaning end of the brush 45 cleans the dust attached to the surface of the filter plate I 106 and the filter plate II 107 together with the scraper II 44.

[0040] A multi-stage dust-containing waste gas treatment device, the working process is as follows:

[0041] From the above description: the exhaust gas enters the treatment box 1 through the air inlet 101, first, the exhaust gas will flow through the filter plate I 106, the filter plate I 106 will preliminarily filter the larger particles in the exhaust gas, and the filtered particles are discharged through the slag discharge port 103 at the bottom of the treatment box 1; after the exhaust gas passes through the filter plate I 106, the spraying mechanism 2 sprays the purification liquid from the top of the treatment box 1, and the fine dust and part of the soluble pollutants in the exhaust gas are sprayed and washed, so that the fine dust in the exhaust gas is settled; at this time, the stirring mechanism 3 is started, the gas in the box is stirred, the spraying effect is better, and the exhaust gas and the spraying liquid are fully contacted; the filter plate II 107 filters the dust still remaining in the exhaust gas after spraying, and the cleaning mechanism 4 cleans the filter plate I 106 and the filter plate II 107 respectively, so that the dust is prevented from accumulating on the surfaces of the filter plate I 106 and the filter plate II 107 to affect the filtering effect; finally, the gas passes through the activated carbon plate 5, the activated carbon plate 5 adsorbs the odor and the remaining pollutants with different characteristics in the exhaust gas, and the purified gas is discharged from the gas outlet 102.

[0042] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only for description purposes, and cannot be understood as indicating or implying relative importance.

[0043] As described above, including but not limited to motor, water pump, electric push rod and other electronic or electrical components are prior art components, which are obtained by private customization or purchase, and the electrical connection between each component is a conventional circuit connection or electrical connection in the prior art, which is not within the protection scope of the present application.

[0044] The above content is only an example and description of the structure of the present application, and those skilled in the art can make various modifications or supplements or use similar ways to replace the described specific embodiments, as long as they do not deviate from the structure of the present application or exceed the scope defined in the present application, which shall be within the protection scope of the present application.

Claims

1. A dust-containing waste gas multi-stage treatment device, comprising a treatment box, a mounting plate, a filter plate I, a filter plate II, a spraying mechanism, and a stirring mechanism; the bottom of the treatment box is provided with a plurality of groups of supporting legs, one end of the treatment box is provided with an air inlet, the other end of the treatment box is provided with an air outlet, two groups of mounting plates are installed in the treatment box, one group of mounting plates is located at one end of the air inlet, and the other group of mounting plates is located at one end of the air outlet; the filter plate I is rotatably installed on the mounting plate located at one end of the air inlet, the filter plate II is rotatably installed on the mounting plate located at one end of the air outlet, a slag discharge port is located at one side of the filter plate I at the bottom of the treatment box, and a slag discharge port is located between the filter plate I and the filter plate II at the bottom of the treatment box; the spraying mechanism is installed on the top of the treatment box, and the stirring mechanism is installed in the treatment box; characterized in that the spraying mechanism comprises a water bucket, a water pump, a connecting pipe, a spraying pipe, an electric push rod, a connecting plate I, a gear ring, and a rack; the water bucket is installed on the top of the treatment box, the water bucket is connected to the connecting pipe installed on the side wall of the treatment box through the water pump installed on the top of the treatment box, the connecting pipe is provided with a sleeve at both ends, the spraying pipe is provided with two groups and is rotatably connected to the sleeves at both ends of the connecting pipe, the spraying pipe is rotatably installed on the top of the treatment box, a plurality of groups of nozzles are arranged at the bottom of the spraying pipe, the spraying pipe is provided with a gear ring at the connecting end of the sleeve, and the gear ring is located outside the treatment box; the electric push rod is installed at the bottom of the gear ring, the telescopic end of the electric push rod is connected to the rack at the top of the electric push rod through the connecting plate I, and the rack is engaged with the gear ring; the stirring mechanism comprises stirring blades, a motor I, a rotating shaft, a fixed plate I, a scraper I, a bidirectional reciprocating screw, and a sliding ring; the filter plate I is rotatably installed on the mounting plate located at one end of the air inlet, the filter plate II is rotatably installed on the mounting plate located at one end of the air outlet, the rotating shaft is located between the filter plate I and the filter plate II and is fixedly connected with the filter plate I and the filter plate II, the top end of the rotating shaft penetrates through the filter plate II and is provided with a bevel gear, the motor I is installed on the top of the treatment box, the output shaft of the motor I penetrates into the treatment box and is provided with a bevel gear, the bevel gear of the output shaft of the motor I is engaged with the top end bevel gear of the rotating shaft, and the rotating shaft is hollow and provided with a plurality of groups of sliding grooves I in the middle; the fixed plate I is installed on one side of the top end of the rotating shaft, the bidirectional reciprocating screw is rotatably installed in the rotating shaft and penetrates through the top end of the rotating shaft at one end and is fixedly connected with the fixed plate I; two groups of sliding rings are located in the rotating shaft and are threadedly connected with the bidirectional reciprocating screw, and the connecting end of the sliding ring and the stirring blade is located in the sliding groove I; the end of the rotating shaft penetrates through the filter plate I, one end of the scraper I is rotatably installed at the end of the rotating shaft, and the other end of the scraper I is fixedly connected with the mounting plate outside the filter plate I.

2. A multi-stage device for treating dust-laden exhaust air according to claim 1, characterized in that The cleaning mechanism is mirror arranged with two groups of fixing plates Ⅱ respectively installed between the filter plate Ⅰ and the filter plate Ⅱ; the cleaning mechanism comprises a motor Ⅱ, a reciprocating screw rod, a sliding rod, a scraper Ⅱ, a through slot, a brush, and a fixing plate Ⅱ; the fixing plate Ⅱ is mirror arranged with two groups of fixing plates Ⅱ respectively installed between the filter plate Ⅰ and the filter plate Ⅱ, the scraper Ⅱ is installed on one side of the fixing plate Ⅱ, the cleaning end of the scraper Ⅱ is attached to the filter plate Ⅰ and the filter plate Ⅱ, the scraper Ⅱ is provided with the through slot, and the brush is slidingly installed in the through slot; the sliding rod is installed on one side of the scraper Ⅱ, the reciprocating screw rod is rotatably installed on the other side of the scraper Ⅱ, the motor Ⅱ is installed at the bottom of the treatment box, the output shaft of the motor Ⅱ penetrates into the treatment box and is fixedly connected with the reciprocating screw rod, the brush is slidingly connected with the sliding rod and is threadedly connected with the reciprocating screw rod.

3. The multi-stage device for treating dust-laden exhaust air according to claim 1, characterized in that The middle part of the rotating shaft is designed to be disconnected, the connecting plate Ⅱ is arranged at the connecting position of the middle part of the rotating shaft, and the connecting plate Ⅱ at the disconnected position of the middle part of the rotating shaft is fixedly connected through bolts and nuts.

4. The multi-stage device for treating dust-laden exhaust air according to claim 1, characterized in that The middle part of the bidirectional reciprocating screw rod is designed to be inserted, and the middle part of the bidirectional reciprocating screw rod is fixedly connected through a pin shaft.

5. The multi-stage device for treating dust-laden exhaust air according to claim 1, characterized in that The motor Ⅰ is a forward and reverse motor.

6. The multi-stage device for treating dust-laden exhaust air according to claim 1, characterized in that The activated carbon plate is installed on one side of the filter plate Ⅱ through the installation slot at the top of the treatment box.

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