A waste gas treatment device for the production of aluminum hydroxide flame retardant

Abstract

This invention relates to the field of waste gas treatment technology and discloses a waste gas treatment device for the production of aluminum hydroxide flame retardant. The device includes a waste gas treatment box and a gas supply housing rotatably connected within the waste gas treatment box. Four independent treatment pipes are installed at the lower end of the gas supply housing, and an exhaust pipe is installed at the top of each independent treatment pipe, extending upwards through the gas supply housing. A gas discharge pipe is installed on the side wall of the waste gas treatment box above the gas supply housing. Multiple air inlets are evenly arranged in a ring around the exhaust pipe at the top of each independent treatment pipe. Filter bags are fixed inside the exhaust pipes. A motor is fixed at the top of the waste gas treatment box, and the rotating end of the motor is connected to the gas supply housing. The design of four independent treatment pipes prevents the dust concentration in the environment of the other filter bags from increasing when one filter bag is being shaken and cleaned, thus not affecting the operation of the remaining filter bags.

Description

Technical Field

[0001] This invention belongs to the field of waste gas treatment technology, and in particular relates to a waste gas treatment device for the production of aluminum hydroxide flame retardant. Background Technology

[0002] In the production process of aluminum hydroxide flame retardants, waste gas mainly originates from raw material processing, chemical reactions, drying, and pulverization. Its composition and characteristics are closely related to the production process. The waste gas includes dust, acidic waste gas, and volatile organic compounds.

[0003] Different substances in the exhaust gas require step-by-step treatment, such as exhaust gas dust removal and acidic exhaust gas treatment. Exhaust gas dust removal is mostly handled by bag filter dust collectors. The exhaust gas usually first passes through a cyclone dust collector to separate large dust particles, and then the exhaust gas passes through a bag filter dust collector for dust removal. To improve the dust removal efficiency of bag filter dust collectors, multiple filter bags are installed in the dust removal chamber, and multiple filter bags work simultaneously.

[0004] In baghouse dust collectors, the different installation positions of the filter bags result in variations in their air inlet angle and flow rate, leading to inconsistent utilization efficiency and varying vibration dust collection times. When vibration dust collection is applied to a particular filter bag, the dust concentration within the dust collection chamber rapidly increases, thereby shortening the service life of other filter bags. Therefore, existing baghouse dust collectors have inherent defects in their operation. Summary of the Invention

[0005] The purpose of this invention is to provide a waste gas treatment device for the production of aluminum hydroxide flame retardant, which aims to solve the problem that when a certain filter bag is subjected to vibration dust removal operation, the dust concentration in the dust removal chamber will increase rapidly, shortening the service life of other filter bags.

[0006] This invention is implemented as follows: a waste gas treatment device for the production of aluminum hydroxide flame retardant, comprising a waste gas treatment box, and further comprising: a gas supply shell rotatably connected inside the waste gas treatment box; four independent treatment pipes are installed at the lower end of the gas supply shell; an exhaust pipe is provided at the top of each independent treatment pipe, and the exhaust pipe extends upward through the gas supply shell; a gas discharge pipe is installed on the side wall of the waste gas treatment box above the gas supply shell; multiple air inlets are evenly arranged in a ring around the top of each independent treatment pipe outside the exhaust pipe; a filter bag is fixed inside the exhaust pipe. Located inside the independent treatment pipe, a motor is fixed to the top of the exhaust gas treatment box, and the rotating end of the motor is connected to the air supply housing; a partition is fixed to the lower end of the independent treatment pipe inside the exhaust gas treatment box, and a waste receiving hole is provided on the partition; the bottom of the exhaust gas treatment box is conical and equipped with a check valve; an air supply assembly is provided on the exhaust gas treatment box, which is used to connect the external exhaust gas pipeline to the air inlets on multiple independent treatment pipes; a shaking mechanism is provided inside the exhaust gas treatment box, which is used to drive the filter bag to shake and clean the dust.

[0007] A further technical solution includes an annular groove on the side wall of the air supply housing, with multiple air inlet openings evenly arranged inside the annular groove. Multiple connecting holes are evenly arranged in an annular pattern on the side wall of the exhaust gas treatment box, and the connecting holes communicate with the annular groove. An annular housing is fixed to the side wall of the exhaust gas treatment box, and an air inlet main pipe is connected to the annular housing. The inner side of the annular housing is open, and the multiple connecting holes are located inside the annular housing. Multiple exhaust gas inlets are provided at the bottom of the air supply housing above the air inlet.

[0008] A further technical solution includes a fixed frame fixed inside the exhaust pipe, four fixed support frames evenly fixed in a ring on the side wall of the fixed frame, a guide sleeve provided on the side wall of the fixed frame, and a telescopic support frame slidably connected horizontally inside the guide sleeve. One end of the telescopic support frame and the end of the fixed support frame are in contact with the inner wall of the filter bag, and a compression spring is fixed to the other end of the telescopic support frame. The end of the compression spring is fixed inside the guide sleeve. There are four sets of telescopic support frames, guide sleeves, and compression springs. The four telescopic support frames and the four fixed support frames are staggered. Four outer push frames are evenly slidably connected in a ring on the side wall of the independent treatment pipe. The end of the outer push frame near the filter bag is in contact with the side wall of the filter bag. A reciprocating push assembly is provided inside the exhaust gas treatment box. The reciprocating push assembly is used to drive the four outer push frames to move back and forth synchronously.

[0009] A further technical solution includes a reciprocating push assembly comprising a rotating ring rotatably connected to the side wall of an independent processing tube, the rotating ring having four evenly spaced inclined elongated holes, push shafts fixed to the four outer push frames of the independent processing tube, the four push shafts being slidably connected within the four inclined elongated holes, a fixed plate fixed to the inner wall of the waste gas treatment box, a sector plate rotatably connected to the lower end of the fixed plate, a transmission elongated hole provided on the sector plate, a drive disk rotatably connected to the lower end of the fixed plate, the drive disk being located between the fixed plate and the sector plate, a drive shaft fixed to the lower end of the drive disk, the drive shaft being slidably connected within the transmission elongated hole, a second motor fixed to the top of the fixed plate, the rotating end of the second motor being connected to the drive disk, silicone pads provided on the arc surface of the sector plate and the side wall of the rotating ring, the arc surface of the sector plate and the side wall of the rotating ring being connected by frictional transmission.

[0010] In a further technical solution, the independent treatment pipe is rotatably connected to the lower end of the gas supply housing, an internal gear ring is fixed on the inner wall of the exhaust gas treatment box, and gears are fixed on the side walls of the four independent treatment pipes, and all four gears mesh with the internal gear ring.

[0011] Further technical solutions also include a dust removal and adjustment system for dynamically adjusting the filtration effect of the filter bags, including:

[0012] The data acquisition module is used to acquire the pressure difference between the feed and discharge ends of the filter bag, the particle concentration at the feed end, and the particle concentration at the discharge end.

[0013] The filter bag clogging status analysis module constructs a clogging status analysis model based on the pressure difference between the feed and discharge ends of the filter bag and outputs a clogging coefficient. This coefficient is then compared with a preset clogging coefficient. If the clogging coefficient is greater than the preset clogging coefficient, then the module generates judgment information to control the cleaning of the filter bag.

[0014] The filter bag damage state analysis module constructs a damage state analysis model based on the pressure difference between the feed and discharge ends of the filter bag, the particle concentration at the feed end, and the particle concentration at the discharge end, and outputs the damage coefficient.

[0015] The filter status assessment module constructs a filter status model based on the clogging coefficient and the damage coefficient and outputs the filter status coefficient.

[0016] The station switching control module is used to receive judgment information and control motor 107 according to the judgment information, so that the filter bag is in the dust removal station and vibrates to remove dust.

[0017] The dust removal frequency evaluation module constructs a dust removal frequency evaluation model based on the filter state coefficient and outputs the target dust removal vibration frequency.

[0018] The dust removal frequency control module is used to control the shaking mechanism 3 to adjust the basic vibration frequency to the target dust removal vibration frequency.

[0019] A further technical solution is that the congestion state analysis model is as follows:

[0020]

[0021] in, Indicates the congestion coefficient. This indicates the pressure difference between the feed and discharge ends of the filter bag. This indicates the initial cleaning pressure differential. This indicates the maximum permissible pressure difference.

[0022] A further technical solution is that the damage state analysis model is as follows:

[0023] ∈[0, 1)

[0024] Indicates the damage coefficient. Indicates the particle concentration at the discharge end. Indicates the particle concentration at the feed end. This indicates the pressure difference between the feed and discharge ends of the filter bag. This indicates the differential pressure threshold.

[0025] A further technical solution is that the filtering state model is:

[0026]

[0027] in, Represents the filtering state coefficient. Indicates the congestion coefficient. Indicates the damage coefficient. This represents a very small constant.

[0028] A further technical solution is that the dust removal frequency evaluation model is as follows:

[0029]

[0030] in, Indicates the target vibration frequency. Indicates the fundamental vibration frequency. Represents the proportionality coefficient. This represents the filtering state coefficient.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0032] 1. The design of four independent processing tubes can prevent the dust concentration in the environment of the other filter bags from increasing when one filter bag is shaken and cleaned, thus not affecting the operation of the other filter bags;

[0033] 2. When the lower end of the independent treatment pipe does not coincide with the waste receiving hole, the check valve can be opened while the filter bag is working to discharge the dust collected at the bottom of the waste gas treatment box. Attached Figure Description

[0034] Figure 1 A schematic diagram of the structure of a waste gas treatment device for the production of aluminum hydroxide flame retardant provided by the present invention;

[0035] Figure 2 Provided by the present invention Figure 1 Schematic diagram of the internal structure of the waste gas treatment box;

[0036] Figure 3 Provided by the present invention Figure 2 Schematic diagram of the internal structure of the gas supply casing;

[0037] Figure 4 Provided by the present invention Figure 3 Schematic diagram of the central gas supply casing;

[0038] Figure 5 Provided by the present invention Figure 3 Schematic diagram of the internal structure of the independent processing tube;

[0039] Figure 6 Provided by the present invention Figure 5 Schematic diagram of the internal structure of the filter bag;

[0040] Figure 7 Provided by the present invention Figure 6 Schematic diagram of the internal structure of the guide sleeve;

[0041] Figure 8 Provided by the present invention Figure 2 A schematic diagram of the reciprocating drive component;

[0042] Figure 9 Provided by the present invention Figure 5 A schematic diagram of the vibration deformation process of the filter bag.

[0043] In the attached diagram: 101, exhaust gas treatment box; 102, gas supply housing; 103, independent treatment pipe; 104, air inlet; 105, exhaust pipe; 106, filter bag; 107, motor one; 108, partition plate; 109, waste material receiving hole; 110, gas discharge pipe; 111, check valve;

[0044] 2. Air supply assembly; 201. Annular settling tank; 202. Air inlet notch; 203. Connection hole; 204. Annular housing; 205. Main air inlet pipe; 206. Exhaust gas inlet;

[0045] 3. Vibration mechanism; 301. Fixed frame; 302. Fixed support frame; 303. Guide sleeve; 304. Telescopic support frame; 305. Compression spring; 306. Outer push frame;

[0046] 4. Reciprocating drive assembly; 401. Rotating ring; 402. Inclined elongated hole; 403. Drive shaft; 404. Fixing plate; 405. Sector plate; 406. Transmission elongated hole; 407. Drive disc; 408. Transmission shaft; 409. Motor II;

[0047] 501, Reinforcing plate; 502, Connecting shaft; 503, Clearance hole; 601, Internal gear ring; 602, Gear. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0049] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0050] Example 1, as Figure 1 , Figure 2 , Figure 3 , Figure 5 As shown, an embodiment of the present invention provides a waste gas treatment device for the production of aluminum hydroxide flame retardant, including a waste gas treatment box 101, and further including: a gas supply shell 102 rotatably connected inside the waste gas treatment box 101, four independent treatment pipes 103 installed at the lower end of the gas supply shell 102, an exhaust pipe 105 provided at the top of the independent treatment pipes 103, the exhaust pipe 105 penetrating upward through the gas supply shell 102, and a gas discharge pipe 110 installed on the side wall of the waste gas treatment box 101 above the gas supply shell 102; a plurality of air inlets 104 are evenly arranged in a ring around the top of the independent treatment pipes 103 outside the exhaust pipe 105, and a filter bag 106 is fixed inside the exhaust pipe 105. 06 is located inside the independent treatment pipe 103. A motor 107 is fixed on the top of the exhaust gas treatment box 101, and the rotating end of the motor 107 is connected to the air supply housing 102. A partition 108 is fixed inside the exhaust gas treatment box 101 at the lower end of the independent treatment pipe 103. A waste receiving hole 109 is provided on the partition 108. The bottom of the exhaust gas treatment box 101 is tapered and equipped with a check valve 111. An air supply component 2 is provided on the exhaust gas treatment box 101. The air supply component 2 is used to connect the external exhaust gas pipeline to the air inlets 104 on multiple independent treatment pipes 103. A shaking mechanism 3 is provided inside the exhaust gas treatment box 101. The shaking mechanism 3 is used to drive the filter bag 106 to shake and clean the dust.

[0051] In this embodiment of the invention, in the initial state, the air supply component 2 connects the external exhaust gas pipeline with the air inlet 104 on multiple independent treatment pipes 103. The exhaust gas enters the independent treatment pipe 103 through the air inlet 104. After being processed by the filter bag 106, the exhaust gas enters the interior of the filter bag 106. After filtration, the exhaust gas enters the upper end of the air supply housing 102 through the exhaust pipe 105, and then exits from the gas discharge pipe 110 and continues to be processed. The dust filtered on the filter bag 106 is partially attached to the side wall of the filter bag 106, and the other part falls to the bottom of the independent treatment pipe 103.

[0052] When a filter bag 106 becomes severely clogged after prolonged use, motor 107 drives the air supply housing 102 to rotate. The air supply housing 102 drives the four independent processing pipes 103 to rotate in a circular motion until the filter bag 106 that needs cleaning is located above the waste receiving hole 109. The lower end of the corresponding independent processing pipe 103 is connected to the waste receiving hole 109 (i.e., the independent processing pipe 103 and the filter bag 106 are in the dust removal position). The dust at the bottom of the independent processing pipe 103 enters the lower end of the partition 108 through the waste receiving hole 109. The shaking mechanism 3 drives the filter bag 106 to shake and clean the dust. The shaken dust moves downward in the independent processing pipe 103 and then enters the lower end of the partition 108 through the waste receiving hole 109. Located above the filter bag 106, the exhaust gas entering through the air inlet 104 promotes the falling dust, accelerating its descent and reducing its re-adhesion onto the filter bag 106. The design of four independent treatment pipes 103 prevents the dust concentration in the environment of the other filter bags 106 from increasing when one filter bag 106 is being shaken for cleaning, thus not affecting the operation of the other filter bags 106. After the filter bags 106 are cleaned, the four independent treatment pipes 103 continue to move in a circular motion, ensuring that the lower end of each independent treatment pipe does not overlap with the waste receiving hole 109. This allows the check valve 111 to be opened when the filter bags 106 are working, discharging the dust collected at the bottom of the exhaust gas treatment box 101.

[0053] like Figures 1-5 As shown, in a preferred embodiment of the present invention, the air supply assembly 2 includes an annular groove 201 provided on the side wall of the air supply housing 102, and a plurality of air inlet openings 202 are uniformly provided in the annular groove 201. A plurality of connecting holes 203 are uniformly provided in an annular shape on the side wall of the exhaust gas treatment box 101, and the connecting holes 203 communicate with the annular groove 201. An annular housing 204 is fixed on the side wall of the exhaust gas treatment box 101, and an air inlet main pipe 205 is connected to the annular housing 204. The inner side of the annular housing 204 is open, and the plurality of connecting holes 203 are located inside the annular housing 204. A plurality of exhaust gas inlets 206 are provided at the bottom of the air supply housing 102 above the air inlet 104.

[0054] In this embodiment of the invention, the exhaust gas pipeline is connected to the main intake pipe 205. The exhaust gas enters the air supply housing 102 through the main intake pipe 205, the annular housing 204, the connecting hole 203, the annular groove 201 and the intake notch 202. The exhaust gas in the air supply housing 102 enters the independent treatment pipe 103 through the exhaust gas inlet 206 and the air inlet 104.

[0055] like Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7 and Figure 9 As shown, in a preferred embodiment of the present invention, the shaking mechanism 3 includes a fixed frame 301 fixed inside the exhaust pipe 105. Four fixed support frames 302 are evenly fixed in a ring on the side wall of the fixed frame 301. A guide sleeve 303 is provided on the side wall of the fixed frame 301. A telescopic support frame 304 is slidably connected horizontally inside the guide sleeve 303. One end of the telescopic support frame 304 and the end of each fixed support frame 302 are in contact with the inner wall of the filter bag 106. A compression spring 305 is fixed to the other end of the telescopic support frame 304. The end is fixed inside the guide sleeve 303. Four sets of telescopic support frames 304, guide sleeves 303 and compression springs 305 are provided. The four telescopic support frames 304 are staggered with the four fixed support frames 302. Four outer push frames 306 are evenly slidably connected to the side wall of the independent treatment pipe 103. The end of the outer push frame 306 near the filter bag 106 is in contact with the side wall of the filter bag 106. A reciprocating push assembly 4 is provided inside the exhaust gas treatment box 101. The reciprocating push assembly 4 is used to drive the four outer push frames 306 to move back and forth synchronously.

[0056] In this embodiment of the invention, in the initial state, the compression spring 305 pushes the telescopic support frame 304, the telescopic support frame 304 abuts against the inner wall of the filter bag 106, the fixed support frame 302 abuts against the inner wall of the filter bag 106, and the four sets of staggered fixed support frames 302 and telescopic support frames 304 support the inner wall of the filter bag 106, opening the filter bag 106 and preventing the filter bag 106 from being concave inward. The outer push frame 306 cooperates with the telescopic support frame 304 to clamp the side wall of the filter bag 106.

[0057] The outer push frame 306, in conjunction with the reciprocating push assembly 4, drives the four outer push frames 306 to reciprocate synchronously. When the four outer push frames 306 move towards the axis of the filter bag 106, the outer push frames 306 overcome the elastic force of the compression spring 305 and drive the telescopic support frame 304 to move synchronously, thereby causing the filter bag 106 to indent inward. Then, the four outer push frames 306 move away from the axis of the filter bag 106, and the compression spring 305 pushes the telescopic support frame 304, thereby causing the telescopic support frame 304 to move synchronously in the opposite direction, so that the filter bag 106 returns to its original deformation state. The deformation process of the filter bag 106 is as follows: Figure 9 As shown, the filter bag 106 vibrates by the reciprocating movement of the outer push frame 306.

[0058] like Figure 2 , Figure 3 , Figure 5 and Figure 8 As shown, in a preferred embodiment of the present invention, the reciprocating push assembly 4 includes a rotating ring 401 rotatably connected to the side wall of the independent processing tube 103. The rotating ring 401 has four evenly distributed inclined elongated holes 402. Push shafts 403 are fixed to the four outer push frames 306 of the independent processing tube 103. The four push shafts 403 are slidably connected within the four inclined elongated holes 402. A fixing plate 404 is fixed to the inner wall of the waste gas treatment box 101. A fan-shaped plate 405 is rotatably connected to the lower end of the fixing plate 404. A transmission elongated hole 4 is provided on the fan-shaped plate 405. 06. A drive disk 407 is rotatably connected to the lower end of the fixed plate 404. The drive disk 407 is located between the fixed plate 404 and the sector plate 405. A transmission shaft 408 is fixed to the lower end of the drive disk 407. The transmission shaft 408 is slidably connected in the transmission elongated hole 406. A second motor 409 is fixed to the top of the fixed plate 404. The rotating end of the second motor 409 is connected to the drive disk 407. Silicone pads are provided on the arc surface of the sector plate 405 and the side wall of the rotating ring 401. The arc surface of the sector plate 405 and the side wall of the rotating ring 401 are connected by frictional transmission.

[0059] In this embodiment of the invention, when the independent processing tube 103 moves circumferentially, the independent processing tube 103 drives the rotating ring 401 to move circumferentially until the silicone pad on the side wall of the rotating ring 401 contacts the silicone pad on the side wall of the sector plate 405. The silicone pad is deformed by force, the motor 409 drives the drive disk 407 to rotate, the drive disk 407 drives the transmission shaft 408 to move circumferentially, the circumferentially moving transmission shaft 408, in conjunction with the transmission elongated hole 406, drives the sector plate 405 to swing back and forth. The sector plate 405 drives the rotating ring 401 to rotate back and forth through friction. The rotating ring 401, which rotates back and forth, drives the outer push frame 306 to move back and forth through the inclined elongated hole 402 and the push shaft 403.

[0060] like Figure 2 and Figure 5 As shown, in a preferred embodiment of the present invention, the independent treatment pipe 103 is rotatably connected to the lower end of the gas supply housing 102, an internal gear ring 601 is fixed on the inner wall of the waste gas treatment box 101, and gears 602 are fixed on the side walls of the four independent treatment pipes 103, and all four gears 602 mesh with the internal gear ring 601.

[0061] In this embodiment of the invention, when the gas supply housing 102 drives the independent processing pipe 103 to move circumferentially, the independent processing pipe 103 drives the gear 602 to move circumferentially. The gear 602 moves circumferentially relative to the internal gear ring 601. The internal gear ring 601 pushes the gear 602 to rotate. The gear 602 drives the independent processing pipe 103 to rotate. The independent processing pipe 103 drives the filter bag 106 to rotate. Through the circumferential movement and rotation of the filter bag 106, the working position of the filter bag 106 is adjusted, so that the filter bag 106 is in uniform contact with the exhaust gas, and the filter bag 106 is fully utilized.

[0062] like Figures 2-4 As shown, in a preferred embodiment of the present invention, a reinforcing plate 501 is rotatably connected inside the exhaust gas treatment box 101. The reinforcing plate 501 is fixedly connected to the gas supply housing 102 via a connecting shaft 502. Four clearance holes 503 are provided on the reinforcing plate 501, and the lower ends of the four independent treatment pipes 103 are rotatably connected to the four clearance holes 503 respectively.

[0063] In this embodiment of the invention, the reinforcing plate 501 and the connecting shaft 502 can provide support for the lower part of the independent processing tube 103, thus preventing the independent processing tube 103 from bending and deforming.

[0064] Example 2: A waste gas treatment device for the production of aluminum hydroxide flame retardant, further comprising a dust removal and adjustment system for dynamically adjusting the filtration effect of filter bag 106, including:

[0065] The data acquisition module is used to acquire the pressure difference between the feed and discharge ends of the filter bag 106, the particle concentration at the feed end, and the particle concentration at the discharge end. The pressure difference between the feed and discharge ends of the filter bag 106 can be acquired by installing a pressure difference sensor on the inside and outside of the filter bag 106. The particle concentration at the feed end and the particle concentration at the discharge end can be acquired by installing a dust concentration sensor on the inside and outside of the filter bag 106, respectively.

[0066] The filter bag clogging status analysis module constructs a clogging status analysis model based on the pressure difference between the feed and discharge ends of the filter bag 106 and outputs a clogging coefficient, which is compared with a preset clogging coefficient. If the clogging coefficient is greater than the preset clogging coefficient, then the judgment information for controlling the cleaning of the filter bag 106 is formed.

[0067] The filter bag damage state analysis module constructs a damage state analysis model based on the pressure difference between the feed and discharge ends of the filter bag 106, the particle concentration at the feed end, and the particle concentration at the discharge end, and outputs the damage coefficient.

[0068] The filter status assessment module constructs a filter status model based on the clogging coefficient and the damage coefficient and outputs the filter status coefficient.

[0069] The station switching control module is used to receive judgment information and control motor 107 according to the judgment information, so that filter bag 106 is in the dust removal station and vibrates to remove dust.

[0070] The dust removal frequency evaluation module constructs a dust removal frequency evaluation model based on the filter state coefficient and outputs the target dust removal vibration frequency.

[0071] The dust removal frequency control module is used to control the shaking mechanism 3 to adjust the basic vibration frequency to the target dust removal vibration frequency.

[0072] Preferably, the congestion state analysis model is:

[0073]

[0074] in, Indicates the congestion coefficient. This indicates the pressure difference between the inlet and outlet ends of filter bag 106. This indicates the initial cleaning pressure difference (the initial cleaning pressure difference varies depending on the material of the dust collector bag; for example, the initial cleaning pressure difference of PTFE (polytetrafluoroethylene) coated needle-punched felt is about 150~300 Pa). This indicates the maximum permissible differential pressure (determined by the manufacturer through testing and operating condition verification). The larger the value, the more severe the clogging of the filter bag 106. In order to quickly clean the filter bag 106, it is necessary to increase the dust removal vibration frequency of the filter bag 106.

[0075] The initial cleaning pressure differential can also be calculated using existing formulas, such as:

[0076]

[0077] in, This indicates the initial cleaning pressure differential. This represents the inherent resistance coefficient of the filter cloth (determined by the filter media structure). Indicates the dynamic viscosity of a gas (as temperature increases), (rise) This indicates the filtration velocity (m / s).

[0078] Preferably, the damage state analysis model is as follows:

[0079] ∈[0, 1)

[0080] Indicates the damage coefficient. Indicates the particle concentration at the discharge end. Indicates the particle concentration at the feed end. This indicates the pressure difference between the inlet and outlet ends of filter bag 106. This indicates the differential pressure threshold (which can be determined based on past experience or by experts). Less than ), The larger the value, the more severe the damage to the filter bag 106. The dust removal vibration frequency of the filter bag 106 should be reduced to avoid high-frequency vibration causing cracks to expand.

[0081] Preferably, the filtering state model is:

[0082]

[0083] in, Represents the filtering state coefficient. Indicates the congestion coefficient. Indicates the damage coefficient. This represents a very small constant (e.g., 0.01, to prevent the denominator from being zero).

[0084] Preferably, the dust removal frequency evaluation model is as follows:

[0085]

[0086] in, Indicates the target vibration frequency. Indicates the basic vibration frequency (set according to the filter bag material). Represents the proportionality coefficient ( The larger the value, the faster the response speed. This represents the filtering state coefficient.

[0087] The cleaning vibration frequency of the filter bag 106 is adjusted in real time based on the clogging and damage status of the filter bag 106.

[0088] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A waste gas treatment device for the production of aluminum hydroxide flame retardant, comprising a waste gas treatment box, characterized in that, Also includes: The exhaust gas treatment box has a rotating gas supply housing. Four independent treatment pipes are installed at the lower end of the gas supply housing. An exhaust pipe is installed at the top of the independent treatment pipes. The exhaust pipe passes through the gas supply housing upwards. A gas discharge pipe is installed on the side wall of the exhaust gas treatment box above the gas supply housing. Multiple air inlets are evenly arranged in a ring around the top of the independent treatment pipe outside the exhaust pipe. A filter bag is fixed inside the exhaust pipe. The filter bag is located inside the independent treatment pipe. A motor is fixed on the top of the exhaust gas treatment box. The rotating end of the motor is connected to the air supply housing. Inside the exhaust gas treatment box, a partition is fixed at the lower end of the independent treatment pipe. The partition is equipped with a waste receiving hole. The bottom of the exhaust gas treatment box is conical and equipped with a check valve. An air supply component is installed on the exhaust gas treatment box to connect the external exhaust gas pipeline to the air inlets on multiple independent treatment pipes. A shaking mechanism is installed inside the exhaust gas treatment box to drive the filter bags to shake and clean the dust. When a filter bag becomes severely clogged after prolonged use, the motor drives the air supply housing to rotate. The air supply housing then drives the four independent processing tubes to rotate in a circular motion until the filter bag that needs cleaning is located above the waste receiving hole. The lower end of the corresponding independent processing tube is connected to the waste receiving hole. The dust at the bottom of the independent processing tube enters the lower end of the partition through the waste receiving hole. The shaking mechanism drives the filter bag to shake and clean the dust. The shaken dust moves downward in the independent processing tube and then enters the lower end of the partition through the waste receiving hole. After the filter bag is cleaned, the four independent treatment tubes continue to move in a circular motion so that the lower end of the independent treatment tube does not coincide with the waste receiving hole. When the filter bag is working, the check valve is opened to discharge the dust collected at the bottom of the exhaust gas treatment box.

2. The waste gas treatment equipment for the production of aluminum hydroxide flame retardant according to claim 1, characterized in that, The air supply assembly includes an annular groove on the side wall of the air supply housing, with multiple air inlet openings evenly arranged inside the annular groove. Multiple connection holes are evenly arranged in an annular pattern on the side wall of the exhaust gas treatment box, and the connection holes communicate with the annular groove. An annular housing is fixed on the side wall of the exhaust gas treatment box, and an air inlet main pipe is connected to the annular housing. The inner side of the annular housing is open, and the multiple connection holes are located inside the annular housing. Multiple exhaust gas inlets are provided at the bottom of the air supply housing above the air inlet.

3. The waste gas treatment equipment for the production of aluminum hydroxide flame retardant according to claim 1, characterized in that, The vibration mechanism includes a fixed frame inside the exhaust pipe, four fixed support frames evenly fixed in a ring on the side wall of the fixed frame, a guide sleeve on the side wall of the fixed frame, and a telescopic support frame slidably connected horizontally inside the guide sleeve. One end of the telescopic support frame and the end of the fixed support frame are in contact with the inner wall of the filter bag. A compression spring is fixed to the other end of the telescopic support frame, and the end of the compression spring is fixed inside the guide sleeve. There are four sets of telescopic support frames, guide sleeves, and compression springs. The four telescopic support frames and the four fixed support frames are staggered. Four outer push frames are evenly slidably connected in a ring on the side wall of the independent treatment pipe. The ends of the outer push frames near the filter bag are in contact with the side wall of the filter bag. A reciprocating push assembly is installed inside the exhaust gas treatment box. The reciprocating push assembly is used to drive the four outer push frames to move back and forth synchronously.

4. The waste gas treatment equipment for the production of aluminum hydroxide flame retardant according to claim 3, characterized in that, The reciprocating drive assembly includes a rotating ring rotatably connected to the side wall of the independent treatment tube. The rotating ring has four evenly spaced inclined elongated holes. Each of the four outer push frames of the independent treatment tube is fixed with a push shaft, which is slidably connected to the four inclined elongated holes. A fixed plate is fixed to the inner wall of the exhaust gas treatment box. A sector plate is rotatably connected to the lower end of the fixed plate. The sector plate has a transmission elongated hole. A drive disk is rotatably connected to the lower end of the fixed plate. The drive disk is located between the fixed plate and the sector plate. A drive shaft is fixed to the lower end of the drive disk and is slidably connected to the transmission elongated hole. A second motor is fixed to the top of the fixed plate. The rotating end of the second motor is connected to the drive disk. Silicone pads are provided on the arc surface of the sector plate and the side wall of the rotating ring. The arc surface of the sector plate and the side wall of the rotating ring are connected by frictional transmission.

5. The waste gas treatment equipment for the production of aluminum hydroxide flame retardant according to claim 1, characterized in that, The independent treatment pipe is rotatably connected to the lower end of the gas supply housing. An internal gear ring is fixed on the inner wall of the exhaust gas treatment box. Gears are fixed on the side walls of the four independent treatment pipes, and all four gears mesh with the internal gear ring.

6. The waste gas treatment equipment for the production of aluminum hydroxide flame retardant according to claim 1, characterized in that, It also includes a dust removal and adjustment system for dynamically adjusting the filtration efficiency of the filter bags, including: The data acquisition module is used to acquire the pressure difference between the feed and discharge ends of the filter bag, the particle concentration at the feed end, and the particle concentration at the discharge end. The filter bag clogging status analysis module constructs a clogging status analysis model based on the pressure difference between the feed and discharge ends of the filter bag and outputs a clogging coefficient. This coefficient is then compared with a preset clogging coefficient. If the clogging coefficient is greater than the preset clogging coefficient, then the module generates judgment information to control the cleaning of the filter bag. The filter bag damage state analysis module constructs a damage state analysis model based on the pressure difference between the feed and discharge ends of the filter bag, the particle concentration at the feed end, and the particle concentration at the discharge end, and outputs the damage coefficient. The filter status assessment module constructs a filter status model based on the clogging coefficient and the damage coefficient and outputs the filter status coefficient. The station switching control module is used to receive judgment information and control motor one according to the judgment information, so that the filter bag is in the dust removal station and vibrates to remove dust. The dust removal frequency evaluation module constructs a dust removal frequency evaluation model based on the filter state coefficient and outputs the target dust removal vibration frequency. The dust removal frequency control module is used to control the shaking mechanism to adjust the basic vibration frequency to the target dust removal vibration frequency.

7. The waste gas treatment equipment for the production of aluminum hydroxide flame retardant according to claim 6, characterized in that, The congestion state analysis model is as follows: in, Indicates the congestion coefficient. This indicates the pressure difference between the feed and discharge ends of the filter bag. This indicates the initial cleaning pressure differential. This indicates the maximum permissible pressure difference.

8. The waste gas treatment equipment for the production of aluminum hydroxide flame retardant according to claim 6, characterized in that, The filtering state model is as follows: in, Represents the filtering state coefficient. Indicates the congestion coefficient. Indicates the damage coefficient. This represents a very small constant.

9. The waste gas treatment equipment for the production of aluminum hydroxide flame retardant according to claim 6, characterized in that, The dust removal frequency evaluation model is as follows: in, Indicates the target vibration frequency. Indicates the fundamental vibration frequency. Represents the proportionality coefficient. This represents the filtering state coefficient.

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