Waste gas treatment device for dye production

Abstract

The invention relates to the field of waste gas treatment, and discloses a waste gas treatment device for dye production, which comprises a box body, a partition plate is arranged in the box body, a plurality of ventilation round holes are formed in the partition plate, a gas ejector pipe is arranged right above the ventilation round holes, a cloth bag is arranged in a manner of penetrating through the ventilation round holes, and a supporting cage is arranged in the cloth bag. A plurality of fixing blocks are evenly arranged on the periphery of the ventilation round hole, a fixing ring is arranged at a bag opening of the cloth bag, a plurality of sliding blocks are evenly arranged at the bottom of the fixing ring, the sliding blocks correspond to the fixing blocks one by one, leakage-proof plates are hinged to the fixing blocks, torsion springs are arranged at the hinged positions of the fixing blocks and the leakage-proof plates, and the side faces of the leakage-proof plates are matched with the side faces of the sliding blocks. A plurality of connecting plates are hinged to the top of the supporting cage, the connecting plates are fixedly connected with the top of the partition plate, and a butt joint mechanism used for being connected with a cloth bag is arranged on the supporting cage. According to the device, the cloth bag can be twisted while the cloth bag is cleaned through pulse back flushing, and the removal effect of dust blocks on the surface of the cloth bag is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and particularly to a waste gas treatment device for dye production. Background Art

[0002] 1,4-Naphthoquinone is a dye raw material, also known as α-naphthoquinone, a yellow crystal with a special smell of benzoquinone. It sublimes when the temperature exceeds 100°C, is slightly soluble in water and gasoline, is easily soluble in ethanol when heated, and is soluble in ether, chloroform, benzene, glacial acetic acid and carbon disulfide. It is commonly used in the manufacture of dyes, drugs and fungicides. At present, the main method for producing 1,4-naphthoquinone in China is the gas-phase oxidation method of naphthalene. The technology for preparing 1,4-naphthoquinone by gas-phase oxidation of naphthalene uses air as an oxidant, and naphthalene is directly oxidized to prepare 1,4-naphthoquinone under the action of a vanadium-based catalyst such as vanadium pentoxide.

[0003] In the gas-phase oxidation process used in the production of 1,4-naphthoquinone, waste gas will be generated. The vanadium-based catalyst will weather into particles due to air flow and high temperature and enter the waste gas. Since the vanadium-based catalyst is carcinogenic and causes great pollution to the air, a bag filter is required for dust removal. During the use of the bag filter, the bags need to be cleaned regularly.

[0004] In the prior art, cleaning is carried out by means of mechanical knocking or pulse reverse blowing. Mechanical knocking produces loud noise and poor dust removal effect, and is gradually being phased out. The pulse reverse blowing cleaning method has become the mainstream. After the bags are used for a long time, the dust on the surface absorbs moisture in the air, forms lumps or shells and adheres to the surface of the bags, blocking the filter holes of the bags. The gas throughput of pulse reverse blowing dust removal becomes smaller, and the cleaning effect becomes worse, resulting in the inability to remove the ash lumps adhering to the surface of the bags. At the same time, since the pulse reverse blowing cleaning method instantaneously blows a large amount of air flow into the bags, due to the large instantaneous air pressure, the bags are subjected to a downward impact force. When the impact force exceeds 200N, a large tensile force is generated at the connection between the bags and the bag mouth fixing rings. After multiple cleanings, the position where the bags contact the partition will be torn or worn out, and in severe cases, it will break directly, resulting in the failure of the dust collector. Summary of the Invention

[0005] The purpose of the present invention is to provide a waste gas treatment device for dye production, aiming to solve the problems that the ash lumps adhered to the bags in the prior art are difficult to remove and the bags are damaged.

[0006] The above technical object of the present invention is achieved through the following technical solutions: An exhaust gas treatment device for dye production, comprising a box body. A partition is horizontally arranged inside the box body. A plurality of ventilation round holes are opened on the partition. A spray pipe is arranged directly above the ventilation round holes. A cloth bag passes through the ventilation round holes. A support cage is arranged inside the cloth bag. A plurality of fixing blocks are evenly arranged along the circumference of the ventilation round holes. The top of the fixing block gradually rises along the circumference of the ventilation round hole, and the top of the fixing block has a set height. A fixing ring is arranged at the bag mouth of the cloth bag. A plurality of sliding blocks are evenly arranged at the bottom of the fixing ring. The sliding blocks correspond to the fixing blocks one by one. A leak-proof plate is hinged on the fixing block. A torsion spring is arranged at the hinge between the fixing block and the leak-proof plate. The side surface of the leak-proof plate is matched with the side surface of the sliding block. A plurality of connecting plates are hinged at the top of the support cage. The connecting plates are fixedly connected to the top of the partition. A docking mechanism for connecting the cloth bag is arranged on the support cage.

[0007] Through the above technical solution, when installing the cloth bag, the bottom of the cloth bag is passed through the ventilation round hole and lowered until the sliding block is at the high position on the fixing block. The leak-proof plate covers the sliding block from the side. Then the support cage is placed downward from the opening of the cloth bag to expand the cloth bag. The support cage is cylindrical, and the cloth bag is also cylindrical after being expanded. The support cage moves downward to the set height and is connected to the inner bottom of the cloth bag through the docking mechanism. Then the connecting plate is connected to the top of the partition, and the position of the support cage is fixed. Part of the weight of the support cage is shared by the connecting plate and the partition, reducing the load on the cloth bag. After a period of exhaust gas treatment, dust accumulates on the outer surface of the cloth bag. Some dust agglomerates into blocks due to absorbing part of the moisture in the air, and the surface of the cloth bag needs to be cleaned. The spray pipe sprays high-speed air into the cloth bag. The high-speed air moves downward along the cloth bag and diffuses at the same time. The gas blows from the inside of the cloth bag to the outside of the cloth bag, blowing off the dust on the surface of the cloth bag. Due to the instantaneous high-speed air forming a downward impact force on the cloth bag, the cloth bag receives a downward acting force. At this time, the sliding block slides from the high position to the low position on the fixing block, and the sliding block pushes the leak-proof plate outward. At this time, the bag mouth of the cloth bag rotates by a certain angle. Since the bottom of the cloth bag is connected to the support cage and will not rotate accordingly, the entire cloth bag is distorted, and the ash blocks and ash shells agglomerated on the outer surface of the cloth bag become loose. The large ash blocks directly fall off or break into small pieces, and then are directly cleaned by the high-speed gas jet. After the high-speed gas pulse back blowing and cleaning is completed, due to the stress of the cloth bag material, the shape of the cloth bag is restored. At the same time, under the action of the torsion spring, the leak-proof plate pushes the sliding block back to the high position on the fixing block, completing the reset of the bag mouth of the cloth bag. At the same time, when the cloth bag is impacted by the gas, the part of the bag mouth can also move downward a small distance, reducing the tension at the opening of the cloth bag, reducing the wear at the opening of the cloth bag, and increasing the service life of the cloth bag.

[0008] A further setting of the present invention is that: the docking mechanism includes a docking cylinder arranged at the lower end of the support cage. A docking cavity is formed in the docking cylinder, and the cross-section of the docking cavity is circular. A docking member matching the docking cavity is arranged at the bottom inside the cloth bag. A plurality of vertical sliding grooves are formed on the side wall of the docking cylinder, and the sliding grooves penetrate through the bottom of the docking cylinder. A plurality of docking rods matching the sliding grooves are horizontally arranged on the docking member.

[0009] Through the above technical solution, when the support cage moves downward, the docking member is inserted into the docking cylinder, and then the docking rod is inserted into the sliding groove. The outer diameter of the docking rod is equal to the width of the sliding groove. When the upper part of the cloth bag rotates, since the docking rod is stuck in the sliding groove, the bottom of the cloth bag will not rotate accordingly, and the cloth bag produces a twisting effect.

[0010] A further setting of the present invention is that: a clamping groove is horizontally arranged at the top of the sliding groove, and both the clamping groove and the sliding groove communicate with the docking cavity.

[0011] Through the above technical solution, when the cloth bag needs to be replaced, the support cage is continuously moved downward by a certain distance. The docking rod contacts the top of the sliding groove, and then the support cage is rotated. The docking rod enters the clamping groove, and then the support cage is lifted. Since the docking rod is located in the clamping groove and cannot move up and down, the bottom of the cloth bag will rise together with the support cage. When the support cage is completely taken out, the inner bottom of the cloth bag also moves above the partition plate, completing the turning of the cloth bag. After the cloth bag is disassembled, only the bag mouth needs to be tied up, and then it can be recycled. Since the outer surface of the cloth bag becomes the inner surface after the cloth bag is taken out, the dust adsorbed on the cloth bag will not be largely diffused into the air, reducing the pollution of the working environment.

[0012] A further setting of the present invention is that: an anti-rotation groove is vertically arranged at one end of the clamping groove away from the sliding groove, and the top of the anti-rotation groove communicates with one end of the clamping groove.

[0013] Through the above technical solution, when taking out the cloth bag, the support cage is rotated, the docking rod enters the clamping groove, the support cage is continuously rotated, the docking rod enters the connection of the clamping groove and the anti-rotation groove, the support cage is lifted, and the docking rod enters the anti-rotation groove, preventing the docking rod from rotating in the clamping groove and returning to the sliding groove again.

[0014] A further setting of the present invention is that: there are locking holes on the connecting plate, a locking screw is arranged at the top of the partition plate, the locking screw passes through the locking hole, a locking nut is arranged on the locking screw, the inner diameter of the locking hole is equal to the outer diameter of the locking screw, and the number of the sliding grooves and the number of the sliding blocks are both equal to the number of the connecting plates.

[0015] Through the above technical solution, when installing the support cage, the locking hole is passed through the locking screw, and then the locking nut is tightened to complete the installation. The number of sliding grooves and the number of sliding blocks are equal to the number of connecting plates, and the positions correspond one to one. When installing the support cage, as long as the position of the locking hole is aligned with the locking screw, the docking rod is aligned with the sliding groove, and the docking installation is more convenient.

[0016] The present invention is further configured as follows: the docking rod is cylindrical, and the bottom opening of the sliding groove is configured in an "eight" shape.

[0017] Through the above technical solution, when installing the support cage, the docking rod is located near the opening of the sliding groove and will be inserted into the sliding groove along the arc-shaped bottom, which makes installation simple and convenient.

[0018] The present invention is further configured as follows: an annular protective plate is provided on the support cage, and a plurality of dispersed holes are formed on the protective plate.

[0019] During high-speed gas pulse backflushing cleaning, after the high-speed gas enters the bag, high-speed turbulence will be generated at a position 10-20 cm below the bag opening, which will have a large impact force on the side wall of the bag. After multiple impacts, the bag will be damaged. Through the above technical solution, the gas will directly impact the protective plate at a position 10-20 cm below the bag opening, and the airflow will blow onto the bag along the dispersion holes, reducing the direct impact of the high-speed turbulence of the gas on the bag and extending the service life of the bag.

[0020] The present invention is further configured as follows: a rolling groove is provided on the fixing block, and a ball is provided in the rolling groove.

[0021] Through the above technical solution, when the sliding block slides down along the fixed block, the resistance is smaller and the rotation angle of the bag mouth is larger.

[0022] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention arranges a plurality of annular fixing blocks, fixes the position of the support cage, and connects the bottom of the cloth bag with the bottom of the support cage. When the high-speed airflow generates an impact force on the cloth bag, the sliding block slides up and down on the fixed block to rotate the bag mouth, but the bottom of the cloth bag does not rotate. The entire cloth bag is twisted and deformed, and the ash blocks and ash shells gathered on the outer surface of the cloth bag become loose. Large ash blocks fall directly or break into small pieces, which are then directly cleaned by high-speed gas spraying, thereby enhancing the cleaning effect. At the same time, when the cloth bag is subjected to the impact force of the gas, the bag mouth can also move downward a short distance, thereby reducing the tension at the opening of the cloth bag, reducing the wear at the opening of the cloth bag, and increasing the service life of the cloth bag.

[0023] 2. The present invention relies on the impact force generated on the cloth bag when high-speed gas is ejected, causing the cloth bag to twist, enhancing the technical effect of high-speed gas pulse backwashing and cleaning. The structure is simple, without the need to add an additional power source, and the manufacturing cost is low.

[0024] 3. By setting the docking rod, sliding groove and clamping groove, the bottom of the cloth bag can be pulled out while the support cage is taken out, and the cloth bag is turned over. After the disassembly of the cloth bag is completed, only the bag mouth needs to be tied up, and then it can be recycled. At this time, the outer surface of the cloth bag becomes the inner surface, and the dust adsorbed on the cloth bag will not be largely diffused into the air, reducing the pollution of the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 is a schematic structural diagram of an embodiment of the present invention; Figure 2 is an internal structural schematic diagram of an embodiment of the present invention; Figure 3 is a schematic structural diagram of a fixing block and a leak-proof plate in an embodiment of the present invention; Figure 4 is a schematic structural diagram of a cloth bag in an embodiment of the present invention; Figure 5 is a schematic structural diagram of a support cage in an embodiment of the present invention; Figure 6 is a schematic connection structure diagram of a cloth bag and a support cage in an embodiment of the present invention; Figure 7 is a schematic structural diagram of a docking cylinder and a docking rod in an embodiment of the present invention; Figure 8 is a schematic structural diagram of a sliding groove, a clamping groove and an anti-rotation groove in an embodiment of the present invention; In the figure, 1, box body; 2, partition board; 2a, ventilation round hole; 3, jet pipe; 4, cloth bag; 5, support cage; 5a, protection board; 5a1, dispersion hole; 6, fixing block; 6a, rolling groove; 7, fixing ring; 7a, sliding block; 8, leak-proof plate; 9, torsion spring; 10, connecting plate; 10a, locking hole; 10b, locking screw; 10c, locking nut; 11, docking mechanism; 12, docking cylinder; 12a, docking cavity; 12b, sliding groove; 12c, clamping groove; 12d, anti-rotation groove; 13, docking part; 14, docking rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0028] An exhaust gas treatment device for dye production provided by the present invention, as Figure 1 and Figure 2 shown, includes a box body 1. A partition 2 is horizontally arranged inside the box body 1. A plurality of ventilation round holes 2a are opened on the partition 2. A spray pipe 3 is arranged directly above the ventilation round holes 2a. A cloth bag 4 is arranged through the ventilation round holes 2a. A support cage 5 is arranged inside the cloth bag 4.

[0029] As Figures 3 to 5 shown, a plurality of fixing blocks 6 are evenly arranged along the circumference of the ventilation round holes 2a. The top of the fixing blocks 6 gradually increases along the circumference of the ventilation round holes 2a. A fixing ring 7 is arranged at the bag mouth of the cloth bag 4. A plurality of sliding blocks 7a are evenly arranged at the bottom of the fixing ring 7. The sliding blocks 7a correspond to the fixing blocks 6 one by one. A leak-proof plate 8 is hinged on the fixing blocks 6. A torsion spring 9 is arranged at the hinge joint of the fixing blocks 6 and the leak-proof plate 8. The side surface of the leak-proof plate 8 is matched with the side surface of the sliding blocks 7a. A plurality of connecting plates 10 are hinged at the top of the support cage 5. Locking holes 10a are arranged on the connecting plates 10. A locking screw 10b is arranged at the top of the partition 2. The locking screw 10b passes through the locking holes 10a. A locking nut 10c is arranged on the locking screw 10b. The inner diameter of the locking holes 10a is equal to the outer diameter of the locking screw 10b. A rolling groove 6a is opened on the fixing blocks 6. A ball is arranged inside the rolling groove 6a.

[0030] As Figure 6 shown, an annular protection plate 5a is arranged on the support cage 5. A plurality of dispersion holes 5a1 are opened on the protection plate 5a.

[0031] As Figures 6 to 8As shown, the support cage 5 is provided with a docking mechanism 11 for connecting the bottom of the cloth bag 4, and the docking mechanism 11 includes a docking tube 12 arranged at the lower end of the support cage 5, and a docking cavity 12a is provided in the docking tube 12, and the cross section of the docking cavity 12a is circular. The bottom of the interior of the cloth bag 4 is provided with a docking piece 13 that matches the docking cavity 12a, and a plurality of sliding grooves 12b are vertically provided on the side wall of the docking tube 12, and the sliding grooves 12b pass through the bottom of the docking tube 12. A plurality of docking rods 14 cooperating with the sliding groove 12b are horizontally arranged on the member 13, a clamping groove 12c is horizontally arranged on the top of the sliding groove 12b, the clamping groove 12c and the sliding groove 12b are both communicated with the docking cavity 12a, an anti-rotation groove 12d is vertically arranged at one end of the clamping groove 12c away from the sliding groove 12b, the top of the anti-rotation groove 12d is communicated with one end of the clamping groove 12c, the docking rod 14 is cylindrical, and the bottom opening of the sliding groove 12b is arranged in an "eight" shape.

[0032] The working principle of this embodiment is as follows: When installing the cloth bag 4, the bottom of the cloth bag 4 is lowered through the ventilation circular hole 2a until the sliding block 7a is located at a high position on the fixed block 6, and the leak-proof plate 8 covers the sliding block from the side, and then the support cage 5 is put down from the opening of the cloth bag 4, and the cloth bag 4 is opened. The support cage 5 is cylindrical, and the cloth bag 4 is also cylindrical after being opened. The support cage 5 moves downward to the set height, the position of the locking hole 10a is aligned with the locking screw 10b, and the docking rod 14 is aligned with the sliding groove 12b, and the support cage 5 continues to descend. At this time, the docking rod 14 slides into the sliding groove 12b along the "eight"-shaped opening of the sliding groove 12b, the support cage 5 and the bottom of the cloth bag 4 are docked, and then the locking nut 10c is tightened to fix the position of the support cage 5. At this time, there is a set distance between the top of the docking cavity 12a and the docking piece 13. Most of the weight of the support cage 5 is shared by the connecting plate 10 and the partition 2, which reduces the load-bearing capacity of the cloth bag 4, reduces the tensile deformation of the cloth bag 4 material, and extends the service life of the cloth bag 4.

[0033] After a period of waste gas treatment, dust accumulates on the outer surface of the cloth bag 4. Some of the dust aggregates into lumps due to absorbing part of the moisture in the air, and it is necessary to clean the surface of the cloth bag 4. The air injection pipe 3 sprays high-speed air flow into the cloth bag 4. The high-speed air flow moves downward along the cloth bag 4 and diffuses at the same time. The gas blows from the inside of the cloth bag 4 to the outside of the cloth bag 4, blowing off the dust on the surface of the cloth bag 4. Due to the instantaneous high-speed air flow forming a downward impact force on the cloth bag 4, the cloth bag 4 receives a downward acting force. At this time, the sliding block 7a slides from a high position to a low position of the fixed block 6, and the sliding block 7a pushes the anti-leakage plate 8 outward. At this time, the opening of the cloth bag 4 rotates by a certain angle. Since the bottom of the cloth bag 4 is connected to the support cage 5 and will not rotate accordingly, the entire cloth bag 4 is distorted, and the ash lumps and ash shells aggregated on the outer surface of the cloth bag 4 become loose. The large ash lumps directly fall off or break into small pieces, and then are directly cleaned by the high-speed gas ejection, which can directly enhance the cleaning effect of the high-speed gas on the ash lumps and ash shells on the outer wall of the cloth bag 4.

[0034] After the high-speed gas pulse backwashing cleaning is completed, due to the stress of the material of the cloth bag 4, the shape of the cloth bag 4 is restored. At the same time, under the action of the torsion spring 9, the anti-leakage plate 8 pushes the sliding block 7a back to a high position of the fixed block 6, completing the reset of the opening of the cloth bag 4.

[0035] At the same time, when the cloth bag 4 is impacted by the gas, a part of the opening of the bag can also move downward a small distance, buffering the impact force of the high-speed gas, reducing the tension received at the opening of the cloth bag 4, reducing the wear at the opening of the cloth bag 4, and increasing the service life of the cloth bag 4.

[0036] When the cloth bag 4 needs to be replaced, loosen the locking nut 10c. The support cage 5 continues to move downward a certain distance. The docking rod 14 contacts the top of the sliding groove 12b. Then rotate the support cage 5, and the docking rod 14 enters the clamping groove 12c. Continue to rotate the support cage 5, and the docking rod 14 enters the connection between the clamping groove 12c and the anti-rotation groove 12d. Then fix the position of the fixing ring 7, lift the support cage 5, and the docking rod 14 enters the anti-rotation groove 12d. The bottom of the anti-rotation groove 12d contacts the bottom of the docking rod 14. As the support cage 5 rises, the bottom of the cloth bag 4 continues to rise with the support cage 5. When the support cage 5 completely moves above the partition 2, the bottom of the cloth bag 4 also moves out, completing the turning of the cloth bag 4. At this time, the outer surface of the cloth bag 4 becomes the inner surface, and the harmful dust adsorbed by the cloth bag 4 is wrapped. Then tie the opening of the cloth bag 4 tightly, and the cloth bag 4 can be subjected to the next recycling treatment. Then connect the support cage 5 and the bottom of the cloth bag 4 in contact, put a new cloth bag 4 in, and put the support cage 5 back in, and the replacement of the cloth bag 4 is completed. During the bag replacement process, since the outer surface of the cloth bag 4 becomes the inner surface, the dust adsorbed on the cloth bag 4 will not diffuse into the air in large quantities, reducing the pollution of the working environment.

[0037] When the high-speed gas pulse backwashing and cleaning is carried out, after the high-speed gas enters the cloth bag 4, high-speed turbulence will be generated at the position 10-20 cm below the opening of the cloth bag 4, which will generate a large impact force on the side wall of the cloth bag 4. After multiple impacts, the cloth bag 4 will be damaged. By setting the protection plate 5a on the support cage 5, the gas will directly impact the protection plate 5a at the position 10-20 cm below the opening of the cloth bag 4, and the air flow will blow onto the cloth bag 4 along the dispersion holes 5a1, reducing the direct impact of the high-speed gas turbulence on the cloth bag 4 and extending the service life of the cloth bag 4.

[0038] It should be noted that the various embodiments in this specification are described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same and similar parts among the various embodiments can be referred to each other.

[0039] The above description is only a description of the preferred embodiments of the present invention, and does not limit the scope of the present invention in any way. Any changes and modifications made by those of ordinary skill in the art of the present invention according to the above disclosure are within the scope of protection of the claims.

Claims

1. An exhaust gas treatment device for dye production, comprising a box body (1). A partition plate (2) is horizontally arranged inside the box body (1). A plurality of ventilation round holes (2a) are formed in the partition plate (2). A spray pipe (3) is arranged directly above the ventilation round holes (2a). A cloth bag (4) is arranged through the ventilation round holes (2a). A support cage (5) is arranged inside the cloth bag (4), characterized in that: A plurality of fixing blocks (6) are uniformly arranged along the circumference of the ventilation round hole (2a). The top of the fixing block (6) gradually rises along the circumference of the ventilation round hole (2a). A fixing ring (7) is arranged at the mouth of the cloth bag (4). A plurality of sliding blocks (7a) are uniformly arranged at the bottom of the fixing ring (7). The sliding blocks (7a) correspond to the fixing blocks (6) one by one. A leakage prevention plate (8) is hinged on the fixing block (6). A torsion spring (9) is arranged at the hinge joint of the fixing block (6) and the leakage prevention plate (8). The side surface of the leakage prevention plate (8) is matched with the side surface of the sliding block (7a). A plurality of connecting plates (10) are hinged at the top of the support cage (5). The connecting plates (10) are fixedly connected with the top of the partition plate (2). A docking mechanism (11) for connecting the bottom of the cloth bag (4) is arranged on the support cage (5).

2. The waste gas treatment device for dye production according to claim 1, wherein: The docking mechanism (11) includes a docking cylinder (12) arranged at the lower end of the support cage (5). A docking cavity (12a) is opened in the docking cylinder (12). The cross-section of the docking cavity (12a) is circular. A docking part (13) matched with the docking cavity (12a) is arranged at the bottom inside the cloth bag (4). A plurality of sliding grooves (12b) are vertically opened on the side wall of the docking cylinder (12). The sliding grooves (12b) penetrate through the bottom of the docking cylinder (12). A plurality of docking rods (14) matched with the sliding grooves (12b) are horizontally arranged on the docking part (13).

3. The waste gas treatment device for dye production according to claim 2, wherein: A clamping groove (12c) is horizontally arranged at the top of the sliding groove (12b). Both the clamping groove (12c) and the sliding groove (12b) communicate with the docking cavity (12a).

4. An exhaust gas treatment device for dye production according to claim 3, characterized in that: An anti-rotation groove (12d) is vertically arranged at one end of the clamping groove (12c) away from the sliding groove (12b). The top of the anti-rotation groove (12d) communicates with one end of the clamping groove (12c).

5. An exhaust gas treatment device for dye production according to claim 2, characterized in that: A locking hole (10a) is arranged on the connecting plate (10). A locking screw (10b) is arranged at the top of the partition plate (2). The locking screw (10b) passes through the locking hole (10a). A locking nut (10c) is arranged on the locking screw (10b). The inner diameter of the locking hole (10a) is equal to the outer diameter of the locking screw (10b). The number of the sliding grooves (12b) and the number of the sliding blocks (7a) are both equal to the number of the connecting plates (10).

6. The waste gas treatment device for dye production according to claim 2, wherein: The docking rod (14) is cylindrical. The bottom opening of the sliding groove (12b) is arranged in a "V" shape.

7. An exhaust gas treatment device for dye production according to claim 1, characterized in that: An annular protection plate (5a) is arranged on the support cage (5). A plurality of dispersion holes (5a1) are opened on the protection plate (5a).

8. The waste gas treatment device for dye production according to claim 1, characterized in that: A rolling groove (6a) is opened on the fixing block (6). A ball is arranged in the rolling groove (6a).

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