Feeding waste gas treatment device for plastic-wood floor production

Abstract

The invention relates to the technical field of stainless steel welding, in particular to a plastic-wood floor production feeding waste gas treatment device which comprises a mixing barrel, a primary filtering assembly is mounted on the mixing barrel and comprises a gas collecting hood arranged at the top of the mixing barrel, and an exhaust pipe is fixedly mounted on the gas collecting hood; according to the present invention, the conical large opening of the gas collection hood of the primary filtration assembly is designed to face downwards, such that the gas collection area is increased, and the waste gas can be stably collected. The bag-type dust collector intercepts dust by using a filter bag, can preliminarily remove most dust in waste gas, reduce the content of particulate matters, relieve the burden of subsequent treatment equipment and improve the overall waste gas treatment efficiency, is stable in structure and can effectively run for a long time, and an activated carbon plate of the secondary filter assembly can further finely filter the waste gas treated by the turbulent flow assembly, so that the waste gas treatment efficiency is improved. And residual fine dust and other pollutants are removed.

Description

Technical Field

[0001] This invention relates to the field of wood-plastic composite flooring production technology, specifically to a waste gas treatment device for feeding materials in wood-plastic composite flooring production. Background Technology

[0002] During the production of wood-plastic composite flooring, the feeding stage (such as the mixing and stirring of wood powder, plastic granules and additives) generates a large amount of dust-containing waste gas. Its core pollutants include: dust particles: wood powder, plastic scraps, etc.; volatile organic compounds: formaldehyde, benzene series compounds, etc. produced by plastic pyrolysis; water-soluble pollutants: ammonia, alcohols, etc. in additives; odors and aerosols: tiny droplets or solid particulate suspensions generated during the mixing process.

[0003] Traditional single-baghouse dust collector solutions for waste gas treatment can only remove large dust particles, with low interception efficiency for fine particles and aerosols. They also cannot treat water-soluble or volatile pollutants, requiring additional equipment. The efficiency of a single spray tower water washing depends on the gas-liquid contact time, and the traditional structure is prone to airflow short-circuiting, resulting in some pollutants not being absorbed. Spray heads are prone to clogging, requiring frequent maintenance. They cannot intercept non-water-soluble VOCs, requiring subsequent activated carbon adsorption, but high humidity waste gas will reduce the life of activated carbon. If the baghouse dust collector and spray tower are directly connected in series, dust can easily clog the spray heads, and water vapor can backflow into the baghouse dust collector, causing the filter bags to clump. Therefore, a waste gas treatment device for feeding materials in the production of wood-plastic composite flooring is proposed. Summary of the Invention

[0004] To address the aforementioned issues, a waste gas treatment device for the production of wood-plastic composite flooring is provided. This device solves the problems of traditional single-bag dust collectors, which can only remove large dust particles, have low interception efficiency for fine particles and aerosols, and cannot treat water-soluble or volatile pollutants, requiring additional equipment. The efficiency of a single spray tower water washing depends on the gas-liquid contact time, and traditional structures are prone to airflow short-circuiting, resulting in some pollutants not being absorbed. Spray heads are also prone to clogging, requiring frequent maintenance, and cannot intercept non-water-soluble VOCs.

[0005] To address the problems in the existing technology, this invention provides a waste gas treatment device for the production of wood-plastic composite flooring.

[0006] As one technical solution of the present invention, a mixing tank is included, on which a primary filter assembly is installed. The primary filter assembly includes a gas collection hood disposed on the top of the mixing tank, an exhaust pipe is fixedly installed on the gas collection hood, a bag filter is fixedly installed at the end of the exhaust pipe away from the mixing tank, a bracket is fixedly installed on the exhaust pipe, and a fixing sleeve is fixedly installed on the bracket. The fixing sleeve is fixedly installed on the outside of the mixing tank.

[0007] As one technical solution of the present invention, an exhaust assembly is installed on one side of the bag filter. The exhaust assembly includes an exhaust pipe fixedly installed on the bag filter. A fixed box is fixedly installed at the end of the exhaust pipe away from the bag filter. A fixed cover is fixedly installed on the top of the fixed box. An exhaust fan is fixedly installed on the top of the fixed cover.

[0008] As one technical solution of the present invention, the exhaust assembly further includes a connecting seat that is fixedly installed at the bottom of the fixed box and the bottom of the fixed cover.

[0009] As one technical solution of the present invention, a flow-disrupting component is installed inside the fixed box. The flow-disrupting component includes an inclined plate fixedly installed inside the fixed box, and two inclined plates are installed in a mirror image.

[0010] As one technical solution of the present invention, the turbulence component further includes a mounting bracket fixedly installed on the inclined plate, a rotating shaft rotatably mounted on the mounting bracket, and fan blades mounted on the rotating shaft.

[0011] As one technical solution of the present invention, a secondary filtration assembly is installed inside the fixed box. The secondary filtration assembly includes a fixed frame fixedly installed inside the fixed box, an activated carbon plate is installed inside the fixed frame, and mounting seats are fixedly installed at the four corners of the fixed frame.

[0012] As one technical solution of the present invention, the secondary filter assembly further includes a groove formed on the fixed frame, a limiting plate is rotatably installed inside the groove, and a bolt is installed on the internal thread of the limiting plate.

[0013] As one technical solution of the present invention, a water-proof component is installed inside the fixed cover. The water-proof component includes a connecting frame fixedly installed inside the fixed cover. A stainless steel mesh is fixedly installed inside the connecting frame. Fixed seats are fixedly installed at the four corners of the connecting frame. A sealing ring is fixedly installed on the outside of the connecting frame.

[0014] As one technical solution of the present invention, a drain pipe is fixedly installed on the fixed box, and a valve is installed on the drain pipe.

[0015] The advantages of this invention compared to the prior art are:

[0016] 1. This application utilizes a downward-facing conical opening design for the primary filter assembly's gas collection hood to increase the gas collection area and ensure stable collection of exhaust gas. The baghouse dust collector uses filter bags to intercept dust, effectively removing most of the dust from the exhaust gas, reducing particulate matter content, lessening the burden on subsequent treatment equipment, improving overall exhaust gas treatment efficiency, and boasting a stable structure for long-term effective operation.

[0017] 2. In this application, water is stored in the fixed box. After primary purification, the exhaust gas enters and is blown to the water surface. The airflow disturbs the water flow, causing some of the exhaust gas to dissolve and degrade in the water, reducing harm. The inclined plate of the turbulence component changes the direction of exhaust gas flow, allowing it to come into contact with the water surface multiple times for dissolution and purification. The fan blades rotate under the action of airflow, further disturbing the airflow and increasing the turbulence of the exhaust gas in the fixed box, so that pollutants are evenly distributed, which is beneficial for subsequent filtration.

[0018] 3. The activated carbon plate of the secondary filter component in this application can further finely filter the exhaust gas after it has been treated by the turbulence component, removing residual fine dust and other pollutants. The mounting base can securely install the fixing frame, and the groove and limiting plate cooperate to facilitate the installation, disassembly and replacement of the activated carbon plate.

[0019] 4. The stainless steel mesh of the water-blocking component in this application can effectively intercept water vapor or droplets that may be carried in the exhaust gas, preventing them from entering subsequent equipment such as exhaust fans and affecting the normal operation of the equipment. The hydrophobic coating can reduce water droplet adhesion and penetration, and the fixing seat and sealing ring ensure stable installation and sealing connection, protecting subsequent equipment from moisture damage, extending the service life of the equipment, ensuring stable operation of the device, and avoiding secondary pollution caused by exhaust gas leakage. Attached Figure Description

[0020] Figure 1 This is a 3D diagram of a waste gas treatment device for the production of wood-plastic composite flooring.

[0021] Figure 2 This is a 3D view of the gas collection hood of a waste gas treatment device for the production of wood-plastic composite flooring.

[0022] Figure 3 This is a three-dimensional view of the exhaust component in a waste gas treatment device for the production of wood-plastic composite flooring.

[0023] Figure 4 This is a three-dimensional view of a turbulence component in a waste gas treatment device for the production of wood-plastic composite flooring.

[0024] Figure 5 This is a three-dimensional diagram of a secondary filtration component in a waste gas treatment device for the production of wood-plastic composite flooring.

[0025] Figure 6 It is a waste gas treatment device for feeding materials in the production of wood-plastic flooring. Figure 5 Enlarged view of point A in the middle.

[0026] Figure 7 This is a three-dimensional view of a fixed cover in a waste gas treatment device for the production of wood-plastic composite flooring.

[0027] Figure 8 This is a three-dimensional view of a water-proof component in a waste gas treatment device for the production of wood-plastic composite flooring.

[0028] The following are the labels in the diagram: 1. Mixing tank; 2. Primary filter assembly; 21. Gas collection hood; 22. Exhaust pipe; 23. Bag filter; 24. Bracket; 25. Fixing sleeve; 3. Drain pipe; 4. Exhaust assembly; 41. Exhaust pipe; 42. Fixing box; 43. Fixing cover; 44. Connecting seat; 5. Exhaust fan; 6. Baffle assembly; 61. Inclined plate; 62. Mounting bracket; 63. Rotating shaft; 64. Fan blade; 7. Secondary filter assembly; 71. Fixing frame; 72. Activated carbon plate; 73. Mounting seat; 74. Groove; 75. Limiting plate; 76. Bolt; 8. Waterproof assembly; 81. Connecting frame; 82. Stainless steel mesh; 83. Fixing seat; 84. Sealing ring. Detailed Implementation

[0029] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0030] See Figure 1 - Figure 8 As shown, a waste gas treatment device for feeding materials in the production of wood-plastic composite flooring includes a mixing tank 1. A primary filter assembly 2 is installed on the mixing tank 1. The primary filter assembly 2 includes a gas collection hood 21 located on top of the mixing tank 1. An extraction pipe 22 is fixedly installed on the gas collection hood 21. A bag filter 23 is fixedly installed at the end of the extraction pipe 22 away from the mixing tank 1. A bracket 24 is fixedly installed on the extraction pipe 22. A fixing sleeve 25 is fixedly installed on the bracket 24. The fixing sleeve 25 is fixedly installed on the outside of the mixing tank 1. The gas collection hood 21 has a conical design with the larger opening facing downwards, which can increase the gas collection area. The fixing sleeve 25 is circular and fits around the outside of the mixing tank 1 and is fixed to the mixing tank 1 by fixing bolts. When material is fed into the material hopper 1, the bag filter 23 is turned on. The exhaust gas generated in the mixing hopper 1 is collected through the gas collection hood 21 and then transported to the bag filter 23 through the exhaust pipe 22. The bag filter 23 uses filter bags to filter and intercept the dust in the exhaust gas, so that the dust adheres to the surface of the filter bags, and the clean gas is discharged through the filter bags. The bracket 24 and the fixing sleeve 25 serve to fix the gas collection hood 21 to ensure its stable collection of exhaust gas. The primary filter component 2 can initially remove most of the dust in the exhaust gas, reduce the content of particulate matter in the exhaust gas, reduce the burden on subsequent treatment equipment, improve the overall exhaust gas treatment efficiency, and ensure long-term effective operation due to its stable structure.

[0031] The bag filter 23 is equipped with an exhaust assembly 4 on one side. The exhaust assembly 4 includes an exhaust pipe 41 fixedly mounted on the bag filter 23. A fixed housing 42 is fixedly mounted at the end of the exhaust pipe 41 furthest from the bag filter 23. A fixed cover 43 is fixedly mounted on the top of the fixed housing 42. An exhaust fan 5 is fixedly mounted on the top of the fixed cover 43. Both the fixed housing 42 and the fixed cover 43 are hollow and fixedly mounted together. The exhaust gas, after primary filtration, enters the fixed housing 42 through the exhaust pipe 41. One end of the exhaust pipe 41 is connected to the outlet of the bag filter 23, and the other end is fixed inside the fixed housing 42. With the exhaust port facing downwards, the exhaust fan 5 generates negative pressure, causing the exhaust gas to flow within the device and smoothly enter the subsequent treatment stages. This provides a flow channel for the exhaust gas after primary treatment. The exhaust fan 5 provides power to ensure continuous flow of the exhaust gas, which is beneficial to the smooth operation of the entire exhaust gas treatment process and improves treatment efficiency. The fixed box 42 contains water, with the water level lower than the exhaust port height of the exhaust pipe 41. After primary purification, the exhaust gas enters the fixed box 42 through the exhaust pipe 41 and is blown onto the water surface. The airflow disturbs the water flow, causing some of the exhaust gas to dissolve in the water for degradation and reducing harm.

[0032] The exhaust assembly 4 also includes a connecting seat 44 fixedly installed at the bottom of the fixed box 42 and the bottom of the fixed cover 43. After the connecting seat 44 on the fixed cover 43 is connected together, the connecting seat 44 is fixed together by mounting bolts. The connecting seat 44 serves to connect and fix the fixed box 42 and the fixed cover 43, ensuring the stability of the exhaust assembly 4 structure. A sealing gasket can also be installed between the two connecting seats 44 to improve the sealing between the fixed box 42 and the fixed cover 43 and prevent exhaust gas from leaking from the connection.

[0033] The fixed box 42 is equipped with a flow turbulence component 6. The flow turbulence component 6 includes an inclined plate 61 fixedly installed inside the fixed box 42. There are two inclined plates 61 installed in a mirror image. When the exhaust gas enters the fixed box 42, since the exhaust direction of the exhaust pipe 41 is downward, it will first come into contact with the water. The exhaust gas is affected by the water surface, which changes the airflow direction, causing the airflow to move upward and come into contact with the inclined plate 61. The inclined plate 61 changes the flow direction of the exhaust gas, causing it to flow downward at a certain angle and come into contact with the water surface again to dissolve and purify it.

[0034] The turbulence-disrupting component 6 also includes a mounting bracket 62 fixedly installed on the inclined plate 61. A rotating shaft 63 is rotatably mounted on the mounting bracket 62, and fan blades 64 are mounted on the rotating shaft 63. Two symmetrical mounting brackets 62 are fixedly installed on the inclined plate 61, and a rotating shaft 63 is rotatably mounted between the two mounting brackets 62. Several sets of fan blades 64 are fixedly mounted on the rotating shaft 63. When the airflow moves upward, it blows the fan blades 64. Under the action of the exhaust gas airflow, the fan blades 64 may generate a certain rotation, further turbulentizing the airflow, so that the exhaust gas is fully mixed and diffused with water in the fixed box 42, enhancing the turbulence of the exhaust gas in the fixed box 42, and making the pollutants in the exhaust gas more evenly distributed. This is beneficial for the subsequent secondary filter component 7 to filter the pollutants more comprehensively and effectively, and improve the filtration effect.

[0035] The fixed box 42 is equipped with a secondary filter assembly 7. The secondary filter assembly 7 includes a fixed frame 71 fixedly installed inside the fixed box 42. An activated carbon plate 72 is installed inside the fixed frame 71. Mounting seats 73 are fixedly installed at the four corners of the fixed frame 71. The exhaust gas after being treated by the turbulence component 6 enters the secondary filtration area and is further finely filtered by the activated carbon plate 72 inside the fixed frame 71 to remove the remaining fine dust and other pollutants. The mounting seats 73 are used to securely install the fixed frame 71 inside the fixed box 42. The mounting seats 73 have through holes inside, and the fixed frame 71 can be fixed to the fixed box 42 by passing mounting bolts through the mounting seats 73.

[0036] The secondary filter assembly 7 also includes a groove 74 formed on the fixed frame 71. A limiting plate 75 is rotatably installed inside the groove 74. Bolts 76 are threaded inside the limiting plate 75. There are four sets of grooves 74, two in a group, distributed on both sides of the fixed frame 71. The limiting plate 75 is rotatably installed in the groove 74. When the limiting plate 75 moves to... Figure 6 In the indicated state, tightening the bolts 76 inside the limiting plate 75 can fix the activated carbon plate 72 in the fixing frame 71. A support plate is fixed to the lower part of the frame of the fixing frame 71, which can lift the activated carbon plate 72 from the bottom and cooperate with the limiting plate 75 to fix the activated carbon plate 72 in the fixing frame 71. After the limiting plate 75 is rotated and stored in the groove 74, the activated carbon plate 72 can be removed from the fixing frame 71, which facilitates the installation, disassembly and replacement of the activated carbon plate 72.

[0037] The fixed cover 43 houses a water-blocking component 8, which includes a connecting frame 81 fixedly installed inside the fixed cover 43. A stainless steel mesh 82 is fixedly installed inside the connecting frame 81, and fixing seats 83 are fixedly installed at each of the four corners of the connecting frame 81. A sealing ring 84 is fixedly installed on the outside of the connecting frame 81. During exhaust gas emission, the water-blocking component 8 acts as a barrier to prevent moisture. The stainless steel mesh 82 is woven from stainless steel wire and features corrosion resistance, high strength, and long service life. Its pore size can be selected according to filtration requirements, effectively blocking larger water droplets while allowing air to pass through. A hydrophobic coating can be applied to the surface of the stainless steel mesh 82. This hydrophobic coating causes water droplets to form beads on the surface of the water-blocking layer and quickly roll off, reducing the adhesion and penetration of water droplets on the surface of the water-blocking layer. The stainless steel mesh 82 effectively intercepts water vapor or liquid droplets that may be carried in the exhaust gas, preventing them from entering subsequent equipment such as the exhaust fan 5 and affecting the normal operation of the equipment. The mounting base 83 securely installs the connecting frame 81 inside the mounting cover 43, and the sealing ring 84 ensures the sealing of the connection, preventing exhaust gas leakage, protecting downstream equipment from moisture damage, extending the service life of the equipment, and ensuring the stable operation of the entire exhaust gas treatment device. At the same time, the excellent sealing performance prevents exhaust gas leakage from causing secondary pollution to the surrounding environment.

[0038] The fixed box 42 is equipped with a drain pipe 3 and a valve. After the exhaust gas is treated, the wastewater will accumulate in the fixed box 42. When it is necessary to discharge the wastewater, the valve on the drain pipe 3 is opened and the liquid can be discharged out of the device through the drain pipe 3.

[0039] During operation, the dust-laden exhaust gas generated during material feeding in the mixing tank 1 floats to the surface under stirring. The gas collection hood 21, installed on top of the mixing tank 1, collects the exhaust gas through negative pressure suction, preventing overflow. The collected exhaust gas is then transported to the bag filter 23 via the extraction pipe 22. The extraction pipe 22 is sealed to the gas collection hood 21 to ensure no leakage. After entering the bag filter 23, the dust particles are trapped on the surface of the filter bags, forming a dust layer. Clean gas passes through the filter bags and enters the exhaust assembly 4, where it first passes through the filter bags to... To remove large dust particles from the exhaust gas and reduce the load on subsequent treatment, the gas filtered by the bag filter 23 enters the fixed box 42 through the exhaust pipe 41. The end of the exhaust pipe 41 extends below the water surface inside the fixed box 42, ensuring that the exhaust gas is in direct contact with the water. After the exhaust fan 5 on the top of the fixed cover 43 is started, a negative pressure is formed inside the fixed box 42, which promotes the flow of exhaust gas from the bag filter 23 to the fixed box 42, maintaining the airflow circulation of the system. When the exhaust gas is ejected at high speed from the exhaust pipe 41, the airflow impacts the water surface to generate water splashes, increasing the gas-liquid contact area. During the accumulation process, some water-soluble pollutants (such as formaldehyde and ammonia) dissolve in the water, and the remaining dust is moistened by the water mist and settles. This process can remove a large number of water-soluble pollutants and fine particles from the exhaust gas. As the exhaust gas floats upward, it impacts the inclined plate 61, changing the airflow direction from vertically upward to obliquely downward, prolonging the residence time of the exhaust gas in the fixed box 42. The airflow drives the fan blades 64 on the mounting frame 62 to rotate, generating a vortex effect, disrupting the laminar flow state, enhancing gas-liquid mixing, and ensuring that pollutants are fully in contact with water, thereby improving the dissolution efficiency. After being washed, the exhaust gas passes through the activated carbon plate 72 inside the fixed frame 71. The microporous structure of the activated carbon adsorbs organic pollutants such as VOCs and odor molecules, and intercepts the remaining fine dust. When the purified exhaust gas rises to the fixed hood 43, the stainless steel mesh 82 filters aerosols and droplets and can intercept liquid water, keeping the discharged gas dry. The sealing ring 84 prevents the exhaust gas from leaking from the connection, ensuring that the gas entering the exhaust fan 5 has a low moisture content and avoiding equipment corrosion. The wastewater containing pollutants that accumulates at the bottom of the fixed box 42 is discharged periodically through the drain pipe 3.

[0040] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A waste gas treatment device for feeding materials in the production of wood-plastic composite flooring, characterized in that, The mixture includes a mixing tank (1), on which a primary filter assembly (2) is installed. The primary filter assembly (2) includes a gas collection hood (21) set on the top of the mixing tank (1). A suction pipe (22) is fixedly installed on the gas collection hood (21). A bag filter (23) is fixedly installed at the end of the suction pipe (22) away from the mixing tank (1). A bracket (24) is fixedly installed on the suction pipe (22). A fixing sleeve (25) is fixedly installed on the bracket (24). The fixing sleeve (25) is fixedly installed on the outside of the mixing tank (1).

2. The waste gas treatment device for feeding materials in the production of wood-plastic composite flooring according to claim 1, characterized in that, An exhaust assembly (4) is installed on one side of the bag filter (23). The exhaust assembly (4) includes an exhaust pipe (41) fixedly installed on the bag filter (23). A fixed box (42) is fixedly installed at the end of the exhaust pipe (41) away from the bag filter (23). A fixed cover (43) is fixedly installed on the top of the fixed box (42). An exhaust fan (5) is fixedly installed on the top of the fixed cover (43).

3. The waste gas treatment device for feeding materials in the production of wood-plastic composite flooring according to claim 2, characterized in that, The exhaust assembly (4) also includes a connecting seat (44) that is fixedly installed at the bottom of the fixed box (42) and the bottom of the fixed cover (43).

4. The waste gas treatment device for feeding materials in the production of wood-plastic composite flooring according to claim 2, characterized in that, The fixed box (42) is equipped with a flow-disrupting component (6), which includes an inclined plate (61) fixedly installed inside the fixed box (42), and two inclined plates (61) are installed in a mirror image.

5. The waste gas treatment device for feeding materials in the production of wood-plastic composite flooring according to claim 4, characterized in that, The turbulence assembly (6) further includes a mounting bracket (62) fixedly mounted on the inclined plate (61), a rotating shaft (63) rotatably mounted on the mounting bracket (62), and a fan blade (64) mounted on the rotating shaft (63).

6. The waste gas treatment device for feeding materials in the production of wood-plastic composite flooring according to claim 2, characterized in that, The fixed box (42) is equipped with a secondary filter assembly (7). The secondary filter assembly (7) includes a fixed frame (71) fixedly installed inside the fixed box (42). An activated carbon plate (72) is installed inside the fixed frame (71). Mounting seats (73) are fixedly installed at the four corners of the fixed frame (71).

7. The waste gas treatment device for feeding materials in the production of wood-plastic composite flooring according to claim 6, characterized in that, The secondary filter assembly (7) also includes a groove (74) formed on the fixed frame (71), a limiting plate (75) is rotatably installed inside the groove (74), and a bolt (76) is threaded inside the limiting plate (75).

8. The waste gas treatment device for feeding materials in the production of wood-plastic composite flooring according to claim 2, characterized in that, The fixed cover (43) is equipped with a water-proof component (8). The water-proof component (8) includes a connecting frame (81) fixedly installed inside the fixed cover (43). A stainless steel mesh (82) is fixedly installed inside the connecting frame (81). A fixing seat (83) is fixedly installed at each of the four corners of the connecting frame (81). A sealing ring (84) is fixedly installed on the outside of the connecting frame (81).

9. The waste gas treatment device for feeding materials in the production of wood-plastic composite flooring according to claim 2, characterized in that, A drain pipe (3) is fixedly installed on the fixed box (42), and a valve is installed on the drain pipe (3).

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