A waste gas treatment device in an aqueous coating production process

Abstract

The utility model provides a kind of waste gas treatment device in water-based paint production process, it is related to waste gas treatment device technical field in water-based paint production process, the utility model includes spray tower, fixedly connected with air inlet pipe on the spray tower, fixedly connected with water inlet pipe on the spray tower, fixedly connected with gas pipe on the spray tower, one end of the gas pipe is fixedly connected with filter box, fixedly connected with exhaust pipe on the filter box, filter plate is provided on the filter box, fixedly connected with collection box on the spray tower, the filter box is connected with collection box by connecting pipe and is communicated, the utility model solves the problem that waste gas into activated carbon adsorption device has higher humidity, high humidity environment can make activated carbon damp, not only significantly reduce its adsorption capacity to VOCs, also possibly cause activated carbon caking, microorganism breeding, shorten replacement cycle, increase operating cost, even because of adsorption efficiency drop leads to waste gas emission exceeds standard.

Description

Technical Field

[0001] This utility model relates to the technical field of waste gas treatment devices in the production process of water-based coatings, and in particular to a waste gas treatment device in the production process of water-based coatings. Background Technology

[0002] In the production process of water-based coatings, the mixing, stirring, dispersion and baking of raw materials will generate waste gas containing volatile organic compounds (VOCs), water vapor, fine coating droplets and a small amount of soluble pollutants. In order to achieve the emission standards, such waste gas needs to be comprehensively treated. Among them, the process of combining spray treatment and activated carbon adsorption is widely used because it can balance the pollutant removal efficiency and economy. The spraying process can remove soluble components, some particulate matter and large-diameter droplets in the waste gas through liquid washing, reducing the subsequent adsorption load. Activated carbon adsorption can deeply purify the residual VOCs and ensure that the waste gas meets the emission standards.

[0003] The exhaust gas from water-based coating production itself carries a high level of moisture (originating from the moisture in raw materials and volatilization during the production process). After spraying treatment, fine droplets (containing detergent components and residual paint particles) that are not completely separated are easily left in the exhaust gas. This results in the exhaust gas entering the activated carbon adsorption device still having high humidity. The high humidity environment will cause the activated carbon to become damp, which will not only significantly reduce its adsorption capacity for VOCs, but may also cause activated carbon to caking, microbial growth, shorten the replacement cycle, increase operating costs, and even lead to excessive exhaust emissions due to decreased adsorption efficiency. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a waste gas treatment device for the production process of water-based coatings.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a waste gas treatment device in the production process of water-based coatings, comprising a spray tower, an air inlet pipe fixedly connected to the spray tower, a water inlet pipe fixedly connected to the spray tower, an air supply pipe fixedly connected to the spray tower, a filter box fixedly connected to one end of the air supply pipe, an exhaust pipe fixedly connected to the filter box, a filter plate provided on the filter box, a collection box fixedly connected to the spray tower, the filter box and the collection box being connected by a connecting pipe, a spray box fixedly connected in the spray tower, a plurality of nozzles provided on the spray box, a demisting structure provided in the filter box, the demisting structure mainly consisting of four fixed plates, the four fixed plates being fixedly connected in pairs to the inner walls of both sides of the filter box, and a plurality of baffles being fixedly connected to the four fixed plates.

[0006] The aforementioned components achieve the following effects: exhaust gas is introduced through the inlet pipe into the spray tower, and the water inlet pipe is connected to an external water pump to pump water into the spray box. The water is then sprayed onto the exhaust gas through nozzles to treat it. The treated exhaust gas then enters the filter box through the gas delivery pipe, is filtered by the filter plates, and is discharged through the exhaust pipe. The cleaned gas also falls into the collection box. As the exhaust gas passes through multiple baffles, water vapor condenses into droplets due to inertia when it impacts the plate walls. The droplets flow down the plate walls and are then collected into the collection box through the connecting pipe. This avoids the situation where the exhaust gas entering the activated carbon adsorption device has high humidity. High humidity can cause activated carbon to become damp, which not only significantly reduces its adsorption capacity for VOCs but may also lead to activated carbon caking, microbial growth, shortened replacement cycles, increased operating costs, and even excessive exhaust emissions due to decreased adsorption efficiency.

[0007] Preferably, two slide rods are slidably inserted into the fixed plate, a connecting frame is fixedly connected to all four slide rods, a slide rail is fixedly connected to two slide rods on one side, a number of rectangular plates are fixedly connected in the slide rail, and a number of cleaning brushes are provided on the two slide rails.

[0008] The effect achieved by the above components is as follows: the cleaning brush is located between the two baffles, and the up-and-down moving connecting frame can drive several cleaning brushes to move up and down back and forth to clean the baffles and prevent some particles from sticking to the baffle wall due to impact when the exhaust gas passes through the baffles, causing blockage.

[0009] Preferably, a plurality of sliders are slidably connected in the slide rail, and the sliders are rotatably connected to the cleaning brush.

[0010] The effect achieved by the above components is that the position of the slider can be adjusted according to the curvature of the baffle plate.

[0011] Preferably, a first spring is fixedly connected to the slider, and one end of the first spring is fixedly connected to the rectangular plate.

[0012] The effect achieved by the above components is that when the cleaning brush contacts one side of the baffle, the first spring is in a contracted state, so the rebound force of the first spring acts on the slider, resulting in a better cleaning effect.

[0013] Preferably, a limiting rail is fixedly connected to the connecting frame, a turntable is rotatably connected to one inner wall of the filter box, a round rod is fixedly connected to the turntable, a motor is fixedly connected to the filter box, and the turntable is driven to rotate by the motor.

[0014] The effect achieved by the above components is as follows: the output end of the motor is connected to the turntable through a reducer and a coupling. The motor model is 17HS4401. Starting the motor can drive the turntable to rotate, which in turn drives the round rod to make circular motion. Under the limit of the limit rail, the connecting frame moves up and down back and forth, making the operation more convenient.

[0015] Preferably, the filter box is provided with an installation structure, which mainly consists of an installation groove. The installation groove is opened on the filter box, the filter plate is slidably inserted into the installation groove, and a sealing strip is fixedly connected to the filter box.

[0016] The effects achieved by the above components are: inserting the filter plate into the mounting groove makes it easy to replace the filter plate, and the sealing strip can improve the sealing of the connection.

[0017] Preferably, the filter plate has two slots, and mounting plates are fixedly connected to both sides of the filter box. A sliding rod is slidably inserted into the mounting plate, and a locking block is fixedly connected to one end of the sliding rod.

[0018] The effect achieved by the above components is as follows: after the filter plate is installed, sliding the sliding rod causes the locking block to engage in the locking slot, thereby limiting the position of the filter plate.

[0019] Preferably, a second spring is sleeved on the sliding rod, one end of the second spring is fixedly connected to the sliding rod, and the other end of the second spring is fixedly connected to the mounting plate.

[0020] The effect achieved by the above components is as follows: when the filter plate is inserted into the mounting slot, the two sides of the filter plate will push the inclined surfaces of the two locking blocks, causing the sliding rod to slide outward. At this time, the second spring is stretched. Therefore, when the locking block comes into contact with the slot, the locking block will be locked into the corresponding slot under the action of the rebound force of the second spring, making the operation more convenient.

[0021] Compared with the prior art, the advantages and positive effects of this utility model are as follows: In this utility model, by setting up a demisting structure, the exhaust gas is passed through the spray tower via the air inlet pipe, and the water inlet pipe is connected to an external water pump to pump water into the spray box. The water is sprayed onto the exhaust gas through nozzles to treat the exhaust gas. The treated exhaust gas enters the filter box through the air delivery pipe, is adsorbed and filtered by the filter plate, and is discharged through the exhaust pipe. The cleaned gas also falls into the collection box. The exhaust gas passes through multiple baffles, and the water vapor condenses into droplets due to inertia when it hits the plate wall. The droplets flow down along the plate wall and are collected into the collection box through the connecting pipe. This avoids the situation where the exhaust gas entering the activated carbon adsorption device has high humidity. High humidity environment will cause the activated carbon to become damp, which will not only significantly reduce its adsorption capacity for VOCs, but may also cause activated carbon to caking, microbial growth, shorten the replacement cycle, increase operating costs, or even cause the exhaust gas emissions to exceed the standard due to the decrease in adsorption efficiency. Attached Figure Description

[0022] Figure 1 This utility model provides a three-dimensional structural schematic diagram of a waste gas treatment device in the production process of water-based coatings.

[0023] Figure 2 This utility model presents a three-dimensional structural schematic diagram of a waste gas treatment device in the production process of water-based coatings from another perspective.

[0024] Figure 3 This utility model provides a partial schematic diagram of the demisting structure of a waste gas treatment device in the production process of water-based coatings.

[0025] Figure 4 This utility model provides another schematic diagram of the demisting structure of a waste gas treatment device in the production process of water-based coatings.

[0026] Figure 5 This utility model provides another schematic diagram of the demisting structure of a waste gas treatment device in the production process of water-based coatings.

[0027] Figure 6 This utility model proposes a waste gas treatment device for the production process of water-based coatings. Figure 1 Enlarged view of section A.

[0028] Legend: 1. Spray tower; 2. Air inlet pipe; 3. Water inlet pipe; 4. Gas delivery pipe; 5. Exhaust pipe; 6. Filter box; 7. Filter plate; 8. Demisting structure; 81. Fixing plate; 82. Baffle plate; 83. Sliding rod; 84. Slide rail; 85. Rectangular plate; 86. Cleaning brush; 87. Sliding block; 88. First spring; 89. Turntable; 810. Limiting rail; 811. Round rod; 812. Motor; 813. Connecting frame; 9. Installation structure; 91. Installation groove; 92. Sealing strip; 93. Installation plate; 94. Sliding rod; 95. Locking block; 96. Locking groove; 97. Second spring; 10. Spray box; 11. Nozzle; 12. Collection box; 13. Connecting pipe. Detailed Implementation

[0029] Example 1, such as Figure 1 As shown, a waste gas treatment device in the production process of water-based coatings includes a spray tower 1, an air inlet pipe 2 and a water inlet pipe 3 fixedly connected to the spray tower 1, an air supply pipe 4 fixedly connected to the spray tower 1, a filter box 6 fixedly connected to one end of the air supply pipe 4, an exhaust pipe 5 fixedly connected to the filter box 6, a filter plate 7 provided on the filter box 6, a collection box 12 fixedly connected to the spray tower 1, the filter box 6 and the collection box 12 being connected by a connecting pipe 13, a spray box 10 fixedly connected in the spray tower 1, and a plurality of nozzles 11 provided on the spray box 10.

[0030] Reference Figures 1 to 5 The filter box 6 is equipped with a demisting structure 8, which mainly consists of four fixed plates 81. The four fixed plates 81 are fixedly connected in pairs to the inner walls of both sides of the filter box 6. Several baffles 82 are fixedly connected to the four fixed plates 81. The exhaust gas is introduced into the spray tower 1 through the air inlet pipe 2. The water inlet pipe 3 is connected to an external water pump, which pumps water to the spray box 10. The water is sprayed onto the exhaust gas through the nozzles 11 to treat the exhaust gas. The treated exhaust gas enters the filter box 6 through the air delivery pipe 4, is filtered by the filter plates 7, and is discharged through the exhaust pipe 5. The cleaned gas also falls into the collection box 12. As the exhaust gas passes through multiple baffles 82, the water vapor condenses into droplets due to inertia when it impacts the plate walls. The gas flows down the plate wall and into the collection box 12 through the connecting pipe 13. This avoids the problem of high humidity in the exhaust gas entering the activated carbon adsorption device. High humidity will cause the activated carbon to become damp, which will not only significantly reduce its adsorption capacity for VOCs, but may also cause activated carbon caking, microbial growth, shorten the replacement cycle, increase operating costs, and even lead to excessive exhaust emissions due to decreased adsorption efficiency. Two sliding rods 83 are slidably inserted on the fixed plate 81. A connecting frame 813 is fixedly connected to the four sliding rods 83. A slide rail 84 is fixedly connected to the two sliding rods 83 on one side. Several rectangular plates 85 are fixedly connected in the slide rail 84. The two slide rails 84 are jointly provided with Several cleaning brushes 86 are provided, located between two baffle plates 82. The vertically movable connecting frame 813 drives the cleaning brushes 86 to move up and down reciprocally, cleaning the baffle plates 82 and preventing some particles from adhering to the plate wall due to impact when exhaust gas passes through, causing blockage. Several sliders 87 are slidably connected in the slide rail 84, and the sliders 87 are rotatably connected to the cleaning brushes 86. The position of the sliders 87 can be adjusted according to the curvature of the baffle plate 82. A first spring 88 is fixedly connected to the slider 87, with one end fixedly connected to a rectangular plate 85. When the cleaning brush 86 contacts one side of the baffle plate 82, the first spring 88 is in a contracted state. The rebound force of the first spring 88 acts on the slider 87, resulting in better cleaning effect. The connecting frame 813 is fixedly connected to the limit rail 810. A turntable 89 is rotatably connected to one side of the inner wall of the filter box 6. A round rod 811 is fixedly connected to the turntable 89. A motor 812 is fixedly connected to the filter box 6. The turntable 89 is driven to rotate by the motor 812. The output end of the motor 812 is connected to the turntable 89 through a reducer and a coupling. The model of the motor 812 is 17HS4401. Starting the motor 812 can drive the turntable 89 to rotate, which in turn drives the round rod 811 to make circular motion. Under the limit of the limit rail 810, the connecting frame 813 moves up and down back and forth, making the operation more convenient.

[0031] Reference Figure 3 and Figure 6The filter box 6 is equipped with an installation structure 9, which mainly consists of an installation groove 91. The installation groove 91 is located on the filter box 6, and the filter plate 7 is slidably inserted into the installation groove 91. A sealing strip 92 is fixedly connected to the filter box 6. Inserting the filter plate 7 into the installation groove 91 facilitates the replacement of the filter plate 7, and the sealing strip 92 improves the sealing of the connection. The filter plate 7 has two slots 96. Installation plates 93 are fixedly connected to both sides of the filter box 6. A sliding rod 94 is slidably inserted into the installation plate 93, and a locking block 95 is fixedly connected to one end of the sliding rod 94. After the filter plate 7 is installed, it slides... The lever 94 allows the locking block 95 to engage in the slot 96, thus limiting the position of the filter plate 7. A second spring 97 is fitted on the sliding lever 94. One end of the second spring 97 is fixedly connected to the sliding lever 94, and the other end is fixedly connected to the mounting plate 93. When the filter plate 7 is inserted into the mounting groove 91, the two sides of the filter plate 7 push the inclined surfaces of the two locking blocks 95, causing the sliding lever 94 to slide outward. At this time, the second spring 97 is stretched. Therefore, when the locking block 95 contacts the slot 96, the locking block 95 engages in the corresponding slot 96 under the action of the rebound force of the second spring 97, making the operation more convenient.

[0032] Working principle: Waste gas is introduced through the inlet pipe 2 into the spray tower 1. The water inlet pipe 3 is connected to an external water pump, which pumps water to the spray box 10. The water is sprayed onto the waste gas through nozzles 11, treating the waste gas. The treated waste gas enters the filter box 6 through the gas delivery pipe 4, is adsorbed and filtered by the filter plate 7, and is discharged through the exhaust pipe 5. The cleaned gas also falls into the collection box 12. The waste gas passes through multiple baffles 82. Water vapor condenses into droplets due to inertia when it impacts the plate wall, flows down the plate wall, and collects in the collection box 12 through the connecting pipe 13, thus preventing the waste gas from entering the activated carbon adsorption device. The air has high humidity, which can cause activated carbon to become damp. This not only significantly reduces its adsorption capacity for VOCs but may also lead to activated carbon caking, microbial growth, shortened replacement cycles, increased operating costs, and even excessive emissions due to decreased adsorption efficiency. The cleaning brush 86 is located between two baffle plates 82. The vertically movable connecting frame 813 can drive several cleaning brushes 86 to move up and down reciprocally to clean the baffle plates 82. This prevents some particles from adhering to the plate walls due to impact when the exhaust gas passes through the baffle plates 82, causing blockage. The cleaning brush 86 can be adjusted according to the curvature of the baffle plate 82. The position of the sliding slider 87 is adjusted by sliding. When the cleaning brush 86 contacts one side of the baffle plate 82, the first spring 88 is in a contracted state. Therefore, the rebound force of the first spring 88 acts on the slider 87, resulting in a better cleaning effect. The output end of the motor 812 is connected to the turntable 89 through a reducer and a coupling. The model of the motor 812 is 17HS4401. Starting the motor 812 can drive the turntable 89 to rotate, which in turn drives the round rod 811 to make a circular motion. Under the limit of the limit rail 810, the connecting frame 813 moves up and down reciprocally, making the operation more convenient. Insert the filter plate 7. The filter plate 7 can be easily replaced by inserting it into the mounting groove 91, and the sealing strip 92 can improve the sealing of the connection. After the filter plate 7 is installed, slide the sliding rod 94 so that the locking block 95 can be locked into the slot 96 to limit the filter plate 7. When the filter plate 7 is inserted into the mounting groove 91, the two sides of the filter plate 7 will push the inclined surfaces of the two locking blocks 95, so that the sliding rod 94 slides outward. At this time, the second spring 97 is stretched. Therefore, when the locking block 95 contacts the slot 96, the locking block 95 is locked into the corresponding slot 96 under the action of the rebound force of the second spring 97, making the operation more convenient.

[0033] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may use the disclosed technical content to make changes or modifications to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the scope of the utility model's technical solution, still fall within the protection scope of this utility model's technical solution. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through specific circumstances.

Claims

1. An exhaust gas treatment device in a water-based paint production process, comprising a spray tower (1), characterized in that: An air inlet pipe (2) is fixedly connected to the spray tower (1), a water inlet pipe (3) is fixedly connected to the spray tower (1), an air supply pipe (4) is fixedly connected to the spray tower (1), a filter box (6) is fixedly connected to one end of the air supply pipe (4), an exhaust pipe (5) is fixedly connected to the filter box (6), a filter plate (7) is provided on the filter box (6), and a collection box (12) is fixedly connected to the spray tower (1). The filter box (6) and the collection box (12) are connected together. The spray tower (1) is connected by a connecting pipe (13). A spray box (10) is fixedly connected in the spray tower (1). Several nozzles (11) are provided on the spray box (10). A demisting structure (8) is provided in the filter box (6). The demisting structure (8) is mainly composed of four fixed plates (81). The four fixed plates (81) are fixedly connected to the inner walls of both sides of the filter box (6) in pairs. Several baffles (82) are fixedly connected to the four fixed plates (81).

2. The waste gas treatment device in an aqueous paint production process according to claim 1, characterized in that: Two slide rods (83) are slidably inserted on the fixed plate (81). A connecting frame (813) is fixedly connected to the four slide rods (83). A slide rail (84) is fixedly connected to the two slide rods (83) on one side. Several rectangular plates (85) are fixedly connected in the slide rail (84). Several cleaning brushes (86) are provided on the two slide rails (84).

3. The waste gas treatment device in an aqueous paint production process according to claim 2, characterized in that: A plurality of sliders (87) are slidably connected in the slide (84), and the sliders (87) are rotatably connected to the cleaning brush (86).

4. The waste gas treatment device in an aqueous paint production process according to claim 3, characterized in that: A first spring (88) is fixedly connected to the slider (87), and one end of the first spring (88) is fixedly connected to the rectangular plate (85).

5. The waste gas treatment device in an aqueous paint production process according to claim 4, characterized in that: A limiting rail (810) is fixedly connected to the connecting frame (813). A turntable (89) is rotatably connected to one inner wall of the filter box (6). A round rod (811) is fixedly connected to the turntable (89). A motor (812) is fixedly connected to the filter box (6). The turntable (89) is driven to rotate by the motor (812).

6. The waste gas treatment device in an aqueous paint production process according to claim 5, characterized in that: The filter box (6) is provided with an installation structure (9), which is mainly composed of an installation groove (91). The installation groove (91) is opened on the filter box (6), and the filter plate (7) is slidably inserted in the installation groove (91). A sealing strip (92) is fixedly connected to the filter box (6).

7. The waste gas treatment device in an aqueous paint production process according to claim 6, characterized in that: The filter plate (7) has two slots (96), and the filter box (6) is fixedly connected to two sides of the filter plate (93). A sliding rod (94) is slidably inserted on the mounting plate (93), and a locking block (95) is fixedly connected to one end of the sliding rod (94).

8. The waste gas treatment device for an aqueous paint production process according to claim 7, characterized in that: A second spring (97) is sleeved on the sliding rod (94). One end of the second spring (97) is fixedly connected to the sliding rod (94), and the other end of the second spring (97) is fixedly connected to the mounting plate (93).

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