An automatic paint mist absorption device for a paint spraying room

Abstract

The present invention relates to an automatic paint mist absorption device for a paint spraying room, the paint mist absorption device comprising a circulation channel (2), a filter (5) and an air outlet plate (7), wherein the circulation channel (2) is a groove arranged around the inner bottom surface of the paint spraying room (1), the interior of the circulation channel (2) is circulating water added with a paint mist coagulant, one side of the circulation channel (2) has a protrusion (6) partially arranged outside the paint spraying room (1), the protrusion (6) is detachably provided with a filter (5), the air outlet plate (7) is arranged around the inner side wall of the paint spraying room (1), and the air outlet plate (7) is used to spray air flow into the paint spraying room (1). Compared with the prior art, the present invention has the advantages of high paint mist absorption efficiency, replaceable filter plates, and real-time dynamic automatic control.

Description

Technical Field

[0001] The invention relates to a paint mist absorbing device, in particular to an automatic paint mist absorbing device for a paint spraying room. Background Art

[0002] In current automated sheet metal spraying lines, the painting process typically takes place in a spray booth. Sheets to be painted are typically placed on a conveyor belt within the booth and then sprayed by a spray gun located above the booth. During the painting process, paint is atomized into fine particles under high pressure. However, not all of the paint reaches the surface being painted during spraying. These particles are carried by the airflow to form a paint mist, which permeates the booth. When the paint mist reaches a certain concentration, it can escape when the sheets are unloaded after painting, polluting the environment and causing significant harm to employees. Furthermore, when the paint mist permeates the booth at a certain concentration, it poses a serious flash explosion hazard. Sparks in the booth can cause a flash fire or explosion. The painting process generates large amounts of solvent vapor, such as benzene, toluene, and xylene, which also form part of the paint mist. Furthermore, the accumulation of paint mist can lead to the proliferation of microorganisms in the booth, producing a foul odor.

[0003] CN201710908268.9 discloses a paint mist purification device for a spray booth, comprising a front assembly with an open front end and a built-in filter cotton flap, a rear assembly connected to the front assembly and having multiple built-in guide plates, an upper surface of the rear assembly having an air outlet and at least one axial flow fan installed, an air inlet opened at the front end of the front assembly, the air inlet communicating with the inner cavity of the rear assembly through a centrally installed filter cotton flap, and a surface of the filter cotton flap having uniformly distributed tiny filter holes. This technical solution uses filter cotton to filter paint mist. Although this solution can effectively filter paint mist, the adhesion of a large number of paint mist particles to the filter cotton can clog the filter holes, greatly reducing the filtration efficiency. Moreover, the used filter cotton can only be disassembled and incinerated and cannot be reused. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic paint mist absorption device for a paint spraying room in order to overcome the defects of the above-mentioned prior art.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] An automated paint mist absorption device for a paint spray booth. The paint spray booth is a closed shell structure. A conveyor belt is provided at the bottom of the paint spray booth. The panels to be painted are placed on the conveyor belt. The paint spray head is provided inside the paint spray booth. The paint mist absorption device includes a circulation channel, a filter, and an air outlet plate. The circulation channel is a groove provided around the bottom surface of the interior of the paint spray booth. The interior of the circulation channel contains circulating water to which a paint mist coagulant is added. One side of the circulation channel has a protrusion partially provided outside the paint spray booth. A filter is detachably provided in the protrusion. The air outlet plate is provided around the inner side wall of the paint spray booth and is used to spray air into the paint spray booth. Paint mist coagulants are generally composed of two agents, A and B. Agent A is injected at the circulating water pump port and is used to remove the viscosity of paint that falls into the water and sterilize and deodorize. Agent B is injected at the starting section of the protrusion to separate the water and paint residue, and to aggregate and suspend the paint residue in the water for easy filtration.

[0007] Furthermore, the filter is formed by multiple layers of filter screens connected in series, and the filter screens are made of steel material.

[0008] Furthermore, the filter is composed of multiple layers of filter screens with gradually increasing mesh sizes along the direction of water flow, and the water flows through the large-pore filter screen first and then through the small-pore filter screen, so that large pieces of paint residue are filtered out first, which is conducive to the replacement of the filter screen and avoids clogging of the filter screen.

[0009] Furthermore, the mesh size of the filter is 0.1 cm to 0.8 cm.

[0010] Furthermore, each layer of the filter screen can be disassembled separately, and the disassembled filter screen can be incinerated to remove the paint residue sticking to the surface.

[0011] A water pump is provided in the circulation channel, and the water pump is used to provide power for the circulating water.

[0012] Furthermore, the flow rate of the water pump is set to 0.005-0.1m 3 / h. At this flow rate, the power demand for filtration can be met with less energy consumption.

[0013] The air outlet plate is a hollow plate-shaped shell. A plurality of downward air outlet pipes are provided on the side of the air outlet plate facing the bottom of the spray booth. The air outlet plate is connected to an external air source through a pipeline.

[0014] The paint mist absorption device also includes an activated carbon filter arranged on the top of the paint spraying room. A fan is provided at the connection between the activated carbon filter and the top of the paint spraying room. The fan is used to blow the air inside the paint spraying room into the activated carbon filter.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. The air outlet plate on the inner wall of the spray booth is used to direct the paint mist toward the circulation channel, which greatly speeds up the absorption rate of the paint mist.

[0017] 2. The circulating flow channel inside the spray booth is led out on one side, and a filter is added to the lead-out part, which makes the filter quick and convenient to replace.

[0018] 3. It adopts a series of multiple layers of filter screens with gradually increasing mesh size along the direction of water flow. The water flows through the large-pore filter screen first and then through the small-pore filter screen, so that large pieces of paint residue are filtered out first, which is conducive to the replacement of the filter screen and avoids the blockage of the filter holes.

[0019] 4. Activated carbon filters can be used to filter organic solvent gases that are insoluble in circulating water with paint mist coagulants added, so that emissions meet standards.

[0020] 5. It has an automatic control system that can monitor the paint mist concentration in real time and make corresponding adjustments to achieve dynamic real-time regulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the three-dimensional structure of the paint mist absorption device used in the paint spray booth of the present invention;

[0022] Figure 2 Schematic diagram of the cross-sectional structure of the paint mist absorption device used in the paint spray booth of the present invention;

[0023] Figure 3 Schematic diagram of the structure of the filter in the present invention;

[0024] Figure 4 It is a structural schematic diagram of the air outlet plate in the present invention.

[0025] In the figure: 1. Paint spray booth, 2. Circulation channel, 3. Activated carbon filter, 4. Water pump, 5. Filter, 6. Protrusion, 7. Air outlet plate, 8. External air source, 71. Air outlet pipe. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] The paint mist absorption device for the paint spraying room includes a circulation channel 2, a filter 5 and an air outlet plate 7. Figure 1 and Figure 2The circulation channel 2 is a groove arranged around the bottom surface of the interior of the paint spraying room 1. The interior of the circulation channel 2 is circulating water with paint mist coagulant added. One side of the circulation channel 2 has a protrusion 6 partially arranged outside the paint spraying room 1. The protrusion 6 is detachably provided with a filter 5. The air outlet plate 7 is arranged around the inner side wall of the paint spraying room 1. The air outlet plate 7 is used to spray air into the paint spraying room 1. The filter 5 is composed of multiple layers of filter screens connected in series. The filter 5 is composed of multiple layers of filter screens with gradually increasing mesh size along the direction of water flow, participating in Figure 3 The mesh size of the filter is 0.1cm to 0.8cm. Each layer of the filter can be disassembled separately. A water pump 4 is provided in the circulation channel 2, and the flow rate of the water pump 4 is set to 0.005 to 0.1m 3 The air outlet plate 7 is a hollow plate-shaped shell. A plurality of downward air outlet pipes 71 are provided on the side of the air outlet plate 7 facing the bottom of the spray booth 1. Figure 4 The air outlet plate 7 is connected to an external air source 8 via a pipeline. The paint mist absorption device also includes an activated carbon filter 3 located at the top of the paint spray booth 1. A fan is provided at the connection between the activated carbon filter 3 and the top of the paint spray booth 1. The fan is used to blow air from the interior of the paint spray booth 1 into the activated carbon filter 3. The paint spray booth is also equipped with an automatic controller that automatically increases the air volume and speeds up the circulating water flow when the paint mist concentration is too high, and activates the activated carbon filter 3 at a fixed operating time.

[0028] During the specific operation process, the paint mist generated during the painting process moves downward under the drive of the air flow ejected from the air outlet pipe 71 and contacts the circulating water in the circulating flow channel 2. Due to the addition of the paint mist coagulant, the absorption effect of the circulating water on the paint mist is greatly increased. The paint mist coagulant agent A is injected at the outlet of the circulating water pump 4 to remove the stickiness of the paint falling in the water, sterilize and deodorize, and increase the absorption effect of the circulating water on the paint mist. Agent B is injected at the starting section of the protrusion 6 to separate the water and the paint residue, and to condense and suspend the paint residue in the water for easy filtration. When the paint residue reaches the filter 5, it is filtered layer by layer by the multi-layer filter screen. When there is too much paint residue adhering to the filter screen, the filter screen is removed and replaced with a new filter screen. The used filter screen is burned in the fire to remove the paint residue adhering to the surface. After that, the filter screen can be used again. The activated carbon filter 3 can be turned on intermittently. Usually, when the paint spray booth 1 is running for 24 hours, the activated carbon filter is automatically turned on for 30 to 20 minutes. The organic solvent gas insoluble in the circulating water with paint mist coagulant added inside the paint spray booth 1 is filtered through the fan, and the activated carbon filter layer can be replaced.

[0029] It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. In the absence of conflict, the features in the embodiments of the present application may be combined with each other in any manner.

Claims

1. An automatic paint mist absorption device for a paint spraying room, wherein the paint spraying room (1) is a closed shell structure, a conveyor belt is provided at the bottom of the paint spraying room (1), a plate to be painted is placed on the conveyor belt, and a paint spraying head is provided inside the paint spraying room (1), characterized in that: The paint mist absorption device includes a circulation channel (2), a filter (5) and an air outlet plate (7), wherein the circulation channel (2) is a groove arranged around the inner bottom surface of the paint spraying room (1), the interior of the circulation channel (2) is circulating water added with a paint mist coagulant, one side of the circulation channel (2) has a protrusion (6) partially arranged outside the paint spraying room (1), the protrusion (6) is detachably provided with a filter (5), the air outlet plate (7) is arranged around the inner side wall of the paint spraying room (1), and the air outlet plate (7) is used to spray air flow into the paint spraying room (1); The filter (5) is composed of multiple layers of filter screens connected in series; The filter (5) is composed of multiple layers of filter screens connected in series, the mesh openings of which gradually increase along the direction of water flow; The air outlet plate (7) is a hollow plate-shaped shell. A plurality of downward air outlet pipes (71) are provided on the side of the air outlet plate (7) facing the bottom surface of the spray booth (1). The air outlet plate (7) is connected to an external air source (8) through a pipeline.

2. The automatic paint mist absorption device for a paint spraying room according to claim 1, characterized in that: The mesh size of the filter is 0.1cm ~ 0.8cm.

3. The automatic paint mist absorption device for a paint spraying room according to claim 2, characterized in that: Each layer of the filter can be removed separately.

4. The automatic paint mist absorption device for a paint spraying room according to claim 1, characterized in that: A water pump (4) is provided in the circulation channel (2).

5. The automatic paint mist absorption device for a paint spraying room according to claim 4, characterized in that: The flow rate of the water pump (4) is set to 0.005 ~ 0.1m 3 / h.

6. The automatic paint mist absorption device for a paint spraying room according to claim 1, characterized in that: The paint mist absorption device further comprises an activated carbon filter (3) arranged at the top of the paint spraying room (1), and a fan is provided at the connection between the activated carbon filter (3) and the top of the paint spraying room (1), and the fan is used to blow air inside the paint spraying room (1) into the activated carbon filter (3).

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