A multi-stage filtering device for coating exhaust gas

Abstract

The utility model relates to waste gas purification equipment technical field especially relates to a kind of coating waste gas multistage filtration treatment device. Its technical scheme includes spray tank, and the both ends of spray tank away from each other are fixedly installed with end cap, and one end cap is fixedly installed with air inlet pipe, and the other end cap is fixedly installed with several adsorption pipes, and filter water subassembly is movably inserted in the inside of spray tank, and filter water subassembly is used to filter spray wastewater. The utility model is treated by spray tank to waste gas, removes paint mist and particulate impurities, and activated carbon filled in multiple adsorption pipes adsorbs harmful substances in waste gas, increases the contact area of waste gas and activated carbon layer, improves purification effect, spray wastewater is filtered and handled by filter water subassembly, so that waste water after purification can be recycled, after filter water subassembly is extracted from spray tank, activated carbon filler in its inside can be replaced, without shutdown maintenance, effectively improve waste gas purification efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of waste gas purification equipment, and in particular to a multi-stage filtration treatment device for coating waste gas. Background Technology

[0002] Coating exhaust gas refers to the mixed exhaust gas that is volatilized during the coating application process. It mainly comes from the volatilization of solvents (or additives) in the coating. Coatings are usually composed of film-forming substances, solvents, pigments and additives. Among them, solvents (such as benzene compounds, esters, ketones, alcohols, etc.) will volatilize into the air during the coating process, forming exhaust gas.

[0003] Existing multi-stage filtration treatment devices for coating exhaust gas typically employ a combination of spraying and adsorption in practical applications. Spraying removes paint mist and particulate impurities from the exhaust gas, followed by adsorption to effectively remove harmful substances. However, spraying is usually conducted within a spray tower, requiring the tower to be shut down for filter plate replacement. This not only hinders maintenance but also disrupts the continuity of exhaust gas purification, wasting considerable time and significantly reducing purification efficiency. Therefore, this application proposes a multi-stage filtration treatment device for coating exhaust gas that is easier to maintain. Utility Model Content

[0004] The purpose of this invention is to address the problem in the prior art that the replacement of filter plates in a spray tower requires operation while the machine is stopped, and to propose a multi-stage filtration treatment device for coating exhaust gas that is easy to maintain.

[0005] The technical solution of this utility model: A multi-stage filtration and treatment device for coating exhaust gas, including a spray box, with end caps fixedly installed at both ends of the spray box, and an air inlet pipe fixedly installed on one of the end caps, and further comprising:

[0006] The adsorption tube is provided in several parts and fixedly installed on matching end caps. One end of the adsorption tube is connected to the inside of the spray box. The adsorption tube adopts a double-layer tube structure and the double tube sandwich is filled with activated carbon particles.

[0007] A water filtration assembly is movably inserted inside the spray box. The water filtration assembly is used to filter spray wastewater. One of the end caps has an elongated opening. One end of the water filtration assembly is inserted into the matching elongated opening and is tightly engaged with it.

[0008] Optionally, the adsorption tube is provided with a built-in exhaust pipe. One end of the built-in exhaust pipe is fixedly connected to a matching end cap and communicates with the inside of the spray box. An activated carbon filling interlayer is provided between the outer wall of the built-in exhaust pipe and the inner wall of the matching adsorption tube. Several exhaust holes communicating with the inside of the activated carbon filling interlayer are drilled on the pipe wall of the built-in exhaust pipe.

[0009] Optionally, a circular partition is fixedly installed inside the built-in exhaust pipe, and the circular partition is located at the end away from the spray box.

[0010] Optionally, the water filtration assembly includes two symmetrically arranged slides, which are fixedly installed on the inner side wall of the spray box. At least two activated carbon filter boxes are slidably installed between the two slides, and the bottom of the activated carbon filter boxes has several perforations.

[0011] Optionally, sealing plates are fitted at both ends of the activated carbon filter box, and both ends of the sealing plates are slidably connected to matching slides. One end of each sealing plate is embedded in a matching elongated opening and tightly engaged with it.

[0012] Optionally, a positioning pin is movably inserted into the sealing plate, one end of which passes through a perforation drilled in the activated carbon filter box and engages with it.

[0013] Optionally, an exhaust hood is fixedly installed on the end of several of the built-in exhaust pipes away from the spray box, an exhaust fan is fixedly installed on the exhaust hood, a support frame is fixedly installed on one end of the spray box, and the exhaust hood is fixedly installed on the top of the support frame.

[0014] Optionally, a plurality of diversion pipes are fixedly installed on the top of the spray box, and a water guide pipe is fixedly installed at one end of the plurality of diversion pipes. A water pump is fixedly installed at the bottom of the spray box, and one end of the water guide pipe is fixedly connected to the outlet port of the water pump. A plurality of nozzles are fixedly installed on the top wall of the spray box, and the nozzles are fixedly connected to matching diversion pipes.

[0015] Optionally, a waterproof baffle is fixedly installed inside the spray box. The waterproof baffle is positioned above the water filtration assembly and close to the adsorption tube. One of the end caps is provided with a cleaning port, and a cover plate is fitted onto the cleaning port.

[0016] Compared with the prior art, this application includes at least one of the following beneficial technical effects: the exhaust gas is sprayed through a spray box to remove paint mist and particulate impurities; the activated carbon filled in multiple adsorption tubes adsorbs harmful substances in the exhaust gas, increasing the contact area between the exhaust gas and the activated carbon layer and improving the purification effect; the sprayed wastewater is filtered by a water filtration assembly, so that the purified wastewater can be recycled; after the water filtration assembly is pulled out of the spray box, the activated carbon packing inside can be replaced without stopping the machine for maintenance, effectively improving the exhaust gas purification efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the spray box of this utility model;

[0019] Figure 3 This is a schematic diagram of the water filtration component structure of this utility model;

[0020] Figure 4 This is a schematic diagram showing the connection between the air intake pipe and the end cap of this utility model;

[0021] Figure 5 This is a schematic diagram of the adsorption tube structure of this utility model;

[0022] Figure 6 for Figure 5 An enlarged diagram of A in the diagram.

[0023] Attached reference numerals: 1. Sprayer box; 11. Waterproof baffle;

[0024] 2. Support frame;

[0025] 3. Exhaust hood; 31. Exhaust fan;

[0026] 4. Adsorption tube; 41. Built-in exhaust pipe; 42. Circular partition; 43. Exhaust hole; 44. Activated carbon filling interlayer;

[0027] 5. Diverter pipe; 51. Nozzle;

[0028] 6. End cap; 61. Long strip opening; 62. Cleaning port;

[0029] 7. Air intake pipe;

[0030] 8. Water filtration assembly; 81. Slide base; 82. Sealing plate; 83. Activated carbon filter box; 84. Leakage hole; 85. Positioning pin;

[0031] 9. Water pipe;

[0032] 10. Water pump. Detailed Implementation

[0033] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] Example

[0035] like Figure 1 , Figure 2 and Figure 5 As shown, this utility model proposes a multi-stage filtration and treatment device for coating exhaust gas, including a spray box 1. End caps 6 are fixedly installed at both ends of the spray box 1, which are far apart from each other. The end caps 6 seal both ends of the spray box 1 to ensure the airtightness of the internal space and prevent exhaust gas leakage. An air inlet pipe 7 is fixedly installed on one end cap 6. One end of an external air guide hose is fixedly connected to the air inlet pipe 7, and the other end of the air guide hose is fixedly connected to the outlet port of a suction pump. The suction pump draws the exhaust gas into the spray box 1 for subsequent purification. A water filter assembly 8 is movably inserted inside the spray box 1 to filter the wastewater after spraying, ensuring cleanliness. The purified water can be recycled. One end cap 6 has a long strip opening 61. One end of the water filter assembly 8 is embedded in the matching long strip opening 61 and in close contact with it. The long strip opening 61 makes it easy to pull the water filter assembly 8 out of the spray box 1, which facilitates the cleaning and maintenance of the activated carbon particles inside. Several adsorption tubes 4 are fixedly installed on the end cap 6 away from the air inlet pipe 7. The adsorption tube 4 has a double-layer tube structure. The interlayer of the double-layer tube structure is filled with a large number of activated carbon particles, which facilitates the adsorption of harmful substances in the exhaust gas. Using multiple adsorption tubes 4 can increase the contact area between the exhaust gas and the activated carbon particles, effectively improving the purification effect.

[0036] like Figure 1 , Figure 5 and Figure 6 As shown, in order to improve the purification effect of waste gas, an internal exhaust pipe 41 is provided inside the adsorption pipe 4. One end of the internal exhaust pipe 41 is fixedly connected to the matching end cap 6 and communicates with the inside of the spray box 1, ensuring that the gas in the spray box 1 can enter the internal exhaust pipe 41. An activated carbon filling interlayer 44 is provided between the outer wall of the internal exhaust pipe 41 and the inner wall of the matching adsorption pipe 4. Activated carbon particles are poured into the activated carbon filling interlayer 44. When the waste gas enters the internal exhaust pipe 41, it passes through the exhaust holes 43 drilled on the pipe wall of the internal exhaust pipe 41 and can come into contact with the activated carbon particles in the activated carbon filling interlayer 44, which facilitates the adsorption of harmful substances in the waste gas. The use of multiple adsorption pipes 4 and a large number of exhaust holes 43 set on the pipe wall of the internal exhaust pipe 41 can increase the contact area between the waste gas and the activated carbon particles, effectively improving the purification effect.

[0037] Furthermore, to prevent exhaust gas from being directly discharged into the exhaust hood 3 along the built-in exhaust pipe 41, a circular baffle 42 is fixedly installed inside the built-in exhaust pipe 41. The circular baffle 42 is located at the end away from the spray box 1. At this time, a large number of exhaust holes 43 are provided on the built-in exhaust pipe 41 and at the position between the circular baffle 42 and the end cover 6. These exhaust holes 43 can ensure that the exhaust gas in the built-in exhaust pipe 41 is in full contact with the activated carbon particles. A small number of exhaust holes 43 are provided on the built-in exhaust pipe 41 and at the position between the circular baffle 42 and the exhaust hood 3. These exhaust holes 43 can ensure that the exhaust gas in the activated carbon filling interlayer 44 re-enters the built-in exhaust pipe 41, ensuring that the exhaust gas after adsorption and purification can enter the exhaust hood 3, so as to facilitate the discharge of the purified gas.

[0038] Secondly, in order to improve the gas flow effect, an exhaust hood 3 is fixedly installed at the end of several adsorption tubes 4 away from the spray box 1. An exhaust fan 31 is fixedly installed on the exhaust hood 3. When the cable on the exhaust fan 31 is connected to an external power supply, the exhaust fan 31 can provide suction to the gas in the exhaust hood 3, thereby accelerating the gas flow effect. A support frame 2 is fixedly installed at one end of the spray box 1, and the exhaust hood 3 is fixedly installed on the top of the support frame 2, which effectively improves the stability of the exhaust hood 3 after installation.

[0039] like Figures 1-4 As shown, to facilitate the filtration of spray wastewater, the filter assembly 8 includes two symmetrically arranged slides 81. The two slides 81 are respectively fixed on two opposite inner side walls of the spray box 1. At least two activated carbon filter boxes 83 are slidably installed between the two slides 81. The sliding installation structure facilitates the pushing and pulling of the activated carbon filter boxes 83, making it easy to replace the activated carbon particles filled inside. Several perforations 84 are drilled at the bottom of the activated carbon filter box 83. When the wastewater is concentrated at the top of the activated carbon filter box 83, the activated carbon particles filled inside adsorb and intercept the impurities in the wastewater, ensuring that the purified water falls into the bottom of the spray box 1 for subsequent use.

[0040] Furthermore, to facilitate the assembly and disassembly of the activated carbon filter box 83, sealing plates 82 are snapped onto both ends of the activated carbon filter box 83. The sealing plates 82 are slidably mounted on two sliding seats 81. Positioning pins 85 are movably inserted into the sealing plates 82. When the end of the activated carbon filter box 83 is inserted into the sealing plate 82, the positioning pins 85 are inserted into the sealing plate 82, and then the positioning pins 85 lock and fix the activated carbon filter box 83, ensuring that the sealing plate 82 can be firmly connected to the activated carbon filter box 83. Pushing and pulling the sealing plate 82 can move the activated carbon filter box 83, which is convenient for the assembly and disassembly of the activated carbon filter box 83. After the activated carbon filter box 83 is removed from the spray box 1, the activated carbon particles filled on the top of the activated carbon filter box 83 can be cleaned, which is convenient for maintenance.

[0041] Secondly, in order to achieve maintenance without stopping the machine, after the activated carbon filter box 83 is pulled out from the spray box 1, the sealing plate 82 on the side away from the air inlet pipe 7 is inserted into the matching elongated opening 61 and tightly locked with it. At this time, the activated carbon filter box 83 is completely exposed outside the spray box 1, which makes it convenient to replace the activated carbon particles filled inside. The sealing plate 82 is sealed at the elongated opening 61, which can prevent a large amount of exhaust gas from being discharged from the elongated opening 61. During maintenance, the airtightness of the spray box 1 is guaranteed, and there is no need to stop the machine.

[0042] like Figure 1 , Figure 2 and Figure 4 As shown, in order to improve the utilization rate of water resources, several diversion pipes 5 are fixedly installed at the top of the spray box 1, and several nozzles 51 are fixedly installed on the inner top wall of the spray box 1. The nozzles 51 are fixedly connected to the matching diversion pipes 5 to ensure that the water in the diversion pipes 5 can enter the nozzles 51, and then spray the exhaust gas in the spray box 1. One end of the aforementioned diversion pipes 5 is fixedly installed with a water guide pipe 9, and a water pump 10 is fixedly installed at the bottom of the spray box 1. The water collected at the bottom of the spray box 1 is pumped into the water guide pipe 9 by the water pump 10, which provides a guarantee for the water supply of the nozzles 51. The water at the bottom of the spray box 1 after purification is recycled, which can reduce the waste of water resources and improve the utilization rate of water resources.

[0043] Furthermore, to prevent a large amount of spray water from entering the adsorption pipe 4, a waterproof baffle 11 is fixedly installed inside the spray box 1. The waterproof baffle 11 is positioned above the water filter assembly 8 and close to the side of the adsorption pipe 4. When the nozzle 51 sprays water, the waterproof baffle 11 can prevent the spray water from directly entering the adsorption pipe 4. The bottom end of the waterproof baffle 11 is provided with a vent opening between it and the water filter assembly 8 to ensure that the exhaust gas after spraying can be normally discharged into the adsorption pipe 4.

[0044] Secondly, a cleaning port 62 is cut out on one of the end caps 6. The cleaning port 62 is located below the elongated opening 61. During the spraying operation, a cover plate is installed at the cleaning port 62 to ensure the sealing of the spray box 1. When it is necessary to clean the bottom of the spray box 1, the cover plate is removed and the bottom of the spray box 1 is rinsed through the cleaning port 62, which facilitates the cleaning and maintenance of the inside of the spray box 1.

[0045] In this embodiment, exhaust gas is first drawn into the inlet pipe 7 by an external air pump to ensure that the exhaust gas can enter the spray box 1. Water is then sprayed into the spray box 1 through the nozzle 51 to treat the exhaust gas, effectively removing paint mist and particulate impurities from the exhaust gas. When the impurities fall onto the water filter assembly 8, the activated carbon particles filled at the top of the activated carbon filter box 83 can adsorb and purify the impurities in the wastewater, ensuring that the purified water is concentrated at the bottom of the spray box 1. The water pump 10 then pumps the purified water into the water guide pipe 9 to continuously supply water to the nozzle 51, ensuring the continuity of the spraying operation and reducing the waste of water resources. The sprayed gas enters multiple adsorption pipes 4. Combined with the numerous exhaust holes 43 drilled on the built-in exhaust pipe 41 installed inside the adsorption pipe 4, the contact area between the exhaust gas and the activated carbon particles in the activated carbon filling layer 44 can be increased, effectively improving the purification effect.

[0046] Because the wastewater contains the most particulate impurities, the activated carbon granules filling the activated carbon filter box 83 need to be replaced frequently to ensure the purification effect on the wastewater. When replacing the activated carbon granules inside the activated carbon filter box 83, first pull one of the activated carbon filter boxes 83 out of the spray box 1, and ensure that one of the sealing plates 82 is sealed at the elongated opening 61 to prevent the exhaust gas in the spray box 1 from leaking out of the elongated opening 61. After the activated carbon filter box 83 is completely exposed outside the spray box 1, the activated carbon granules filling its top can be replaced. The replacement of activated carbon granules can be completed without stopping the machine, which is convenient for maintenance and effectively improves the exhaust gas purification efficiency.

[0047] The above specific embodiments are merely several optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A multi-stage filtration treatment device for coating exhaust gas, comprising a spray box (1), wherein end caps (6) are fixedly installed at both ends of the spray box (1), and an air inlet pipe (7) is fixedly installed on one of the end caps (6), characterized in that, Also includes: Adsorption tube (4), the adsorption tube (4) is provided in several and fixedly installed on matching end caps (6), one end of the adsorption tube (4) is connected to the inside of the spray box (1), the adsorption tube (4) adopts a double-layer tube structure and is filled with activated carbon particles in the double tube interlayer. A water filter assembly (8) is movably inserted inside the spray box (1). The water filter assembly (8) is used to filter spray wastewater. One of the end caps (6) has a long strip opening (61). One end of the water filter assembly (8) is embedded in the matching long strip opening (61) and is tightly engaged with it.

2. The multi-stage filtration and treatment device for coating exhaust gas according to claim 1, characterized in that, The adsorption tube (4) is provided with an internal exhaust pipe (41). One end of the internal exhaust pipe (41) is fixedly connected to a matching end cap (6) and communicates with the inside of the spray box (1). An activated carbon filling interlayer (44) is provided between the outer wall of the internal exhaust pipe (41) and the inner wall of the matching adsorption tube (4). Several exhaust holes (43) communicating with the inside of the activated carbon filling interlayer (44) are drilled on the pipe wall of the internal exhaust pipe (41).

3. The multi-stage filtration and treatment device for coating exhaust gas according to claim 2, characterized in that, A circular partition (42) is fixedly installed inside the built-in exhaust pipe (41), and the circular partition (42) is located at the end away from the spray box (1).

4. The multi-stage filtration and treatment device for coating exhaust gas according to claim 1, characterized in that, The water filtration assembly (8) includes two symmetrically arranged slides (81), which are fixedly installed on the inner side wall of the spray box (1). At least two activated carbon filter boxes (83) are slidably installed between the two slides (81), and several holes (84) are drilled at the bottom of the activated carbon filter boxes (83).

5. The multi-stage filtration and treatment device for coating exhaust gas according to claim 4, characterized in that, Both ends of the activated carbon filter box (83) are fitted with sealing plates (82), and both ends of the sealing plates (82) are slidably connected to matching slides (81). One end of each of the two sealing plates (82) is embedded in a matching elongated opening (61) and tightly engaged with it.

6. The multi-stage filtration and treatment device for coating exhaust gas according to claim 5, characterized in that, A positioning pin (85) is movably inserted into the sealing plate (82), and one end of the positioning pin (85) passes through a perforation drilled in the activated carbon filter box (83) and engages with it.

7. The multi-stage filtration and treatment device for coating exhaust gas according to claim 3, characterized in that, Several of the built-in exhaust pipes (41) are fixedly installed with an exhaust hood (3) at the end away from the spray box (1). An exhaust fan (31) is fixedly installed on the exhaust hood (3). A support frame (2) is fixedly installed at one end of the spray box (1). The exhaust hood (3) is fixedly installed on the top of the support frame (2).

8. The multi-stage filtration and treatment device for coating exhaust gas according to claim 1, characterized in that, A plurality of diversion pipes (5) are fixedly installed on the top of the spray box (1), and a water guide pipe (9) is fixedly installed at one end of the plurality of diversion pipes (5). A water pump (10) is fixedly installed at the bottom of the spray box (1). One end of the water guide pipe (9) is fixedly connected to the outlet port of the water pump (10). A plurality of nozzles (51) are fixedly installed on the top inner wall of the spray box (1). The nozzles (51) are fixedly connected to the matching diversion pipes (5).

9. A multi-stage filtration and treatment device for coating exhaust gas according to claim 8, characterized in that, The spray box (1) is fixedly installed with a waterproof baffle (11). The waterproof baffle (11) is located above the water filter assembly (8) and close to the adsorption tube (4). One of the end caps (6) is provided with a cleaning port (62), and a cover plate is fitted at the cleaning port (62).

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