Waste gas filtering device of coating equipment

Abstract

The utility model provides a waste gas filtering device of coating equipment, and belongs to the technical field of waste gas filtering. The problems that in the prior art, a waste gas filtering device is large in ventilation resistance and large in occupied ground space are solved. According to the waste gas filtering device of the coating equipment, the coating equipment comprises a coating box, the waste gas filtering device comprises a filtering box body connected with the coating box, the filtering box body is provided with a gas inlet end and a gas outlet end, and a filtering plate located between the gas inlet end and the gas outlet end is installed in the filtering box body; the filtering box body is located above the top of the coating box, the air inlet end is arranged at the bottom of the filtering box body, connected to the top wall of the coating box and communicated with an inner cavity of the coating box, and the air outlet end is provided with a butterfly valve used for cutting off or adjusting the exhaust flow. The utility model has the advantages that the occupied ground space is reduced, and the ventilation effect of the pipeline is guaranteed to the greatest extent.

Description

Technical Field

[0001] This utility model belongs to the field of exhaust gas filtration technology and relates to an exhaust gas filtration device for coating equipment. Background Technology

[0002] Coating equipment generates coating waste gas during operation. This waste gas contains a large amount of volatile organic compounds (VOCs), such as benzene, toluene, xylene, ethyl acetate, methyl ethyl ketone, isopropanol, and ethers, and may also contain dust and particulate matter. To protect the ecological environment and human health, coating waste gas needs to be purified before being released into the atmosphere to meet environmental emission requirements.

[0003] For example, Chinese patent literature discloses a spray booth exhaust gas treatment and recovery mechanism (authorization announcement number: CN220803990U), which includes a base plate, a first filter box installed on one side of the top of the base plate, an air inlet pipe installed on one side of the first filter box, a first filter plate and a second filter plate installed inside the first filter box, and a filter spray assembly installed on the top of the first filter box; a support frame is fixedly connected to the top center of the base plate, an exhaust fan is installed on the top of the support frame, a first connecting pipe is installed between the first filter box and the exhaust fan, two third filter plates are installed inside the second filter box, and a fixing assembly is installed on the inner wall of the second filter box.

[0004] The exhaust gas treatment and recovery mechanism for the paint booth has the following shortcomings during use: The first and second filter boxes are arranged side by side on the base plate, occupying a large space and making the usable space in the workshop very limited. At the same time, the first and second filter boxes are connected by a first connecting pipe with multiple bends and a high-to-low inlet structure. The first connecting pipe with the above structure increases the exhaust resistance of the pipeline. In addition, due to the long distance of the first connecting pipe, some sticky particles in the painting exhaust gas are easy to adhere to the inner wall of the first connecting pipe. After a period of accumulation, the pipe diameter will decrease and the exhaust resistance of the pipeline will increase. In order to overcome the pipeline resistance, the exhaust fan needs to continuously increase its power to overcome the resistance and maintain normal operation. In severe cases, it can easily lead to motor burnout and also damage the service life of the exhaust fan. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a waste gas filtration device for coating equipment. The technical problem this invention aims to solve is addressing the issues of high ventilation resistance and large floor space requirements in existing waste gas filtration devices.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A waste gas filtration device for a coating equipment, the coating equipment including a coating box, the waste gas filtration device including a filter box connected to the coating box, the filter box having an inlet end and an outlet end, a filter plate installed inside the filter box between the inlet end and the outlet end, characterized in that the filter box is located above the top of the coating box, the inlet end is located at the bottom of the filter box, and the inlet end is connected to the top wall of the coating box and communicates with the inner cavity of the coating box, and a butterfly valve for cutting off or adjusting the exhaust flow is installed on the outlet end.

[0008] In use, the butterfly valve also needs to be connected to an exhaust fan. The butterfly valve can regulate the airflow, allowing multiple coating boxes in the coating equipment to share one exhaust fan, thus improving the efficiency of exhaust gas collection. This exhaust gas filtration device is located above the top of the coating box and directly connected to it. On the one hand, it makes good use of the vertical space in the workshop, reduces the floor space occupied, and improves the utilization rate of the vertical space. On the other hand, it significantly reduces the length of the pipe at the connection between the exhaust gas filtration device and the coating box, avoiding airflow loss caused by bends. At the same time, the shorter pipe length at the connection also reduces the adhesion of some sticky particles in the coating exhaust gas, maximizing the ventilation effect of the pipe, minimizing the frequency of pipe maintenance, improving the service life of the exhaust gas filtration device, and ensuring the collection efficiency of coating exhaust gas. This solves the problems of high ventilation resistance and large floor space occupation of existing exhaust gas filtration devices.

[0009] In the exhaust gas filtration device of the aforementioned coating equipment, the filter box is vertically arranged, the outlet is located at the top of the filter box, and multiple filter plates are arranged at vertical intervals. The longitudinal section of each filter plate is a V-shape with the opening facing downwards. The filter plates inside the filter box adopt an inverted V-shaped structure. Compared with the traditional straight structure, each filter plate can increase the filtration area by approximately 41%. Within the limited internal space of the filter box, the filtration area is maximized to ensure filtration efficiency.

[0010] In the exhaust gas filtration device of the aforementioned coating equipment, the side wall of the filter housing has a notch, and a door for opening or closing the notch is rotatably connected to the filter housing. This facilitates the inspection, disassembly, and replacement of the filter plates inside the filter housing.

[0011] In the aforementioned exhaust gas filtration device for coating equipment, the butterfly valve includes a cylindrical valve body connected to the outlet end. A valve core plate for opening or closing the valve body is rotatably connected within the valve body. A motor for controlling the rotation of the valve core plate is mounted on the valve body, and the output shaft of the motor is horizontally positioned and connected to the valve core plate. The butterfly valve can regulate airflow. In practical applications, it allows multiple coating boxes in the coating equipment to share a single exhaust fan. When a coating box is not in use, the butterfly valve can close promptly, reducing airflow loss caused by the partial shutdown of coating boxes. Furthermore, the rotation angle of the valve core plate of each butterfly valve can vary between 0° and 90°, ensuring that the airflow of multiple coating boxes sharing the exhaust fan is as balanced as possible, thus improving exhaust gas collection efficiency.

[0012] In the exhaust gas filtration device of the aforementioned coating equipment, the coating equipment further includes a control panel mounted on the coating box. The control panel is electrically connected to the motor and is used to control the motor's opening and closing. This enables linkage between the coating box and the corresponding butterfly valve. When the coating box is in use, the control panel controls the motor of the corresponding butterfly valve to drive the valve core plate of the butterfly valve to rotate, thus opening the butterfly valve. When the coating box is not in use, the control panel controls the motor of the corresponding butterfly valve to drive the valve core plate of the butterfly valve to reset, thus closing the butterfly valve, thereby achieving linkage between the coating box and the corresponding butterfly valve.

[0013] Compared with existing technologies, the advantages of the exhaust gas filtration device of this coating equipment are as follows: This exhaust gas filtration device is located above the top of the coating box of the coating equipment and is directly connected to the coating box. On the one hand, it can make good use of the vertical space of the workshop, reduce the floor space occupied, and improve the utilization rate of the vertical space of the workshop. On the other hand, it significantly reduces the length of the pipe at the connection between the exhaust gas filtration device and the coating box, avoiding air volume loss caused by bends. At the same time, due to the shorter pipe length at the connection, it can also reduce the adhesion of some sticky particles in the coating exhaust gas, maximize the ventilation effect of the pipe, minimize the frequency of pipe maintenance, and ensure the collection efficiency of coating exhaust gas, thereby solving the problems of high ventilation resistance and large floor space occupation of existing exhaust gas filtration devices. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the exhaust gas filtration device of the coating equipment in use in Example 1.

[0015] Figure 2 This is a schematic diagram of the structure of the exhaust gas filtration device box door of the coating equipment in Embodiment 1 when it is open.

[0016] Figure 3 This is a schematic diagram of the structure of the disc valve of the exhaust gas filtration device of the coating equipment in Embodiment 1.

[0017] Figure 4 This is a schematic diagram of the exhaust gas filtration device of the coating equipment in use in Example 2.

[0018] In the diagram, 1. Painting box; 2. Filter box; 2a. Air inlet; 2b. Air outlet; 3. Filter plate; 4. Butterfly valve; 4a. Valve body; 4b. Valve core plate; 4c. Motor; 5. Box door; 6. Control panel. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] Example 1

[0021] A waste gas filtration device for coating equipment, as described above Figure 1-3 The coating equipment includes a coating box 1, and the exhaust gas filtration device includes a filter box 2 connected to the coating box 1. The filter box 2 has an air inlet end 2a and an air outlet end 2b. A filter plate 3 is installed inside the filter box 2 between the air inlet end 2a and the air outlet end 2b. The filter box 2 is located above the top of the coating box 1. The air inlet end 2a is located at the bottom of the filter box 2 and is connected to the top wall of the coating box 1 and communicates with the inner cavity of the coating box 1. A butterfly valve 4 for cutting off or adjusting the exhaust flow is installed on the air outlet end 2b.

[0022] In use, butterfly valve 4 also needs to be connected to an exhaust fan (not shown in the figure). This exhaust gas filtration device is located above the top of the coating box 1 of the coating equipment and is directly connected to the coating box 1. On the one hand, it can make good use of the vertical space of the workshop, reduce the floor space occupied, and improve the utilization rate of the vertical space of the workshop. On the other hand, it significantly reduces the length of the pipe at the connection between the exhaust gas filtration device and the coating box, avoiding air volume loss caused by the existence of bends (according to past experience, under the same conditions, for every 90° bend added to the ventilation duct, the air volume is lost by about 4%, and reducing two 90° bends can reduce the total air volume loss by about 7.8%). At the same time, since the pipe length at the connection between the two is short, it can also reduce the adhesion of some sticky particles in the coating exhaust gas, maximize the ventilation effect of the duct, minimize the frequency of duct maintenance, and ensure the collection efficiency of coating exhaust gas, thereby solving the problems of high ventilation resistance and large floor space occupation of existing exhaust gas filtration devices.

[0023] Reference Figure 1 and Figure 2Specifically, the filter housing 2 is vertically arranged, the air outlet 2b is located at the top of the filter housing 2, and there are multiple filter plates 3 arranged vertically at intervals. The longitudinal section of each filter plate 3 is a V-shape with the opening facing downwards. The filter plates 3 inside the filter housing 2 adopt an inverted V-shaped structure. Compared with the traditional straight structure, each filter plate 3 can increase the filtration area by approximately 41%. Within the limited internal space of the filter housing 2, the filtration area is maximized to ensure filtration efficiency. At the same time, the filter plates 3 can use drawer-type activated carbon cotton containing activated carbon inside, which is convenient for use and replacement. While filtering particulate matter, it also adsorbs volatile organic compounds (VOCs) to a certain extent, reducing the processing pressure on the end treatment equipment.

[0024] In this embodiment, the filter box 2 preferably has a notch on its side wall, and the filter box 2 is also rotatably connected to a door 5 for opening or closing the notch.

[0025] Reference Figure 3 Specifically, the butterfly valve 4 includes a cylindrical valve body 4a connected to the outlet end 2b. A valve core plate 4b for opening or closing the valve body 4a is rotatably connected inside the valve body 4a. A motor 4c for controlling the rotation of the valve core plate 4b is installed on the valve body 4a. The output shaft of the motor 4c is horizontally arranged and connected to the valve core plate 4b.

[0026] In this preferred embodiment, the coating equipment further includes a control panel 6 disposed on the coating box 1. The control panel 6 is electrically connected to the motor 4c and is used to control the motor 4c to turn on or off.

[0027] Example 2

[0028] This embodiment is basically the same in structure and principle as Embodiment 1, the difference being: (Refer to...) Figure 4 When the coating equipment has multiple coating boxes 1, each coating box 1 is equipped with this exhaust gas filtration device, and the butterfly valves 4 of multiple exhaust gas filtration devices are connected to the same exhaust fan (not shown in the figure) through connecting pipes. The rotation angle of the valve core plate 4b of each butterfly valve 4 can be different between 0° and 90°, so that the air volume of multiple coating boxes 1 can be as balanced as possible, thereby improving the exhaust gas collection efficiency.

[0029] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A waste gas filtration device for a coating equipment, the coating equipment comprising a coating box (1), the waste gas filtration device comprising a filter box (2) connected to the coating box (1), the filter box (2) having an inlet end (2a) and an outlet end (2b), the filter box (2) having a filter plate (3) installed inside the filter box (2) between the inlet end (2a) and the outlet end (2b), characterized in that, The filter box (2) is located above the top of the coating box (1). The air inlet (2a) is located at the bottom of the filter box (2) and is connected to the top wall of the coating box (1) and communicates with the inner cavity of the coating box (1). A butterfly valve (4) for cutting off or adjusting the exhaust flow is installed on the air outlet (2b).

2. The exhaust filtering device of a coating apparatus according to claim 1, characterized in that, The filter box (2) is arranged vertically, the air outlet (2b) is located at the top of the filter box (2), and there are multiple filter plates (3) arranged at intervals. The longitudinal section of the filter plate (3) is V-shaped with the opening facing downwards.

3. The exhaust filtering device of a coating apparatus according to claim 2, wherein The filter box (2) has a notch on its side wall, and a door (5) for opening or closing the notch is rotatably connected to the filter box (2).

4. The exhaust filtering device of a coating apparatus according to claim 1 or 2 or 3, characterized in that, The butterfly valve (4) includes a cylindrical valve body (4a) connected to the outlet end (2b). A valve core plate (4b) for opening or closing the valve body (4a) is rotatably connected inside the valve body (4a). A motor (4c) for controlling the rotation of the valve core plate (4b) is installed on the valve body (4a). The output shaft of the motor (4c) is horizontally arranged and connected to the valve core plate (4b).

5. The exhaust filtering device of a coating apparatus according to claim 4, wherein The coating equipment also includes a control panel (6) disposed on the coating box (1), the control panel (6) being electrically connected to the motor (4c) and used to control the motor (4c) to turn on or off.

Images