A waste gas treatment device for paint production

Abstract

The application relates to a waste gas treatment device for paint production and relates to the technical field of waste gas treatment, which comprises a cylinder. The application can perform pretreatment on waste gas before the waste gas enters the cylinder through the combination structure of a coarse-effect filter and an electrostatic dust removal box. The coarse-effect filter can intercept large-particle dust and impurities in the waste gas, and the electrode plate in the electrostatic dust removal box can adsorb fine particles through the action of high-voltage static electricity, thereby improving the dust removal efficiency. When the rotating cylinder rotates, the annular pipe and the spray head can be synchronously rotated, the rotating spray head can uniformly spray treatment liquid in the cylinder, the contact area with the waste gas can be increased, and the soluble pollutants in the waste gas can be fully dissolved. The honeycomb ceramic carrier in the catalytic oxidation box can provide a large attachment area for the catalyst coating, and the catalyst coating can perform a catalytic oxidation reaction on the waste gas after pretreatment and spray absorption at normal temperature.

Description

Technical Field

[0001] This application relates to waste gas treatment, and more particularly to a waste gas treatment device for paint production. Background Technology

[0002] During the production of coatings, the organic raw materials used often undergo volatilization during the mixing process, generating organic waste gas. This organic waste gas is one of the main sources of air pollution, and its harm should not be underestimated. If this organic waste gas is directly released into the atmosphere without effective treatment during production, it will undergo complex chemical reactions with other gases in the atmosphere, generating various pollutants. This process will have a very serious adverse impact on air quality, causing it to deteriorate continuously.

[0003] In the field of waste gas treatment, biofilter technology and photocatalytic oxidation technology are gradually emerging. However, biofilter technology requires a very large area, which is a difficult problem for areas with scarce land resources. Photocatalytic oxidation technology has very demanding reaction conditions, such as strict requirements on light intensity and temperature. In order to solve the above problems, a waste gas treatment device for paint production is proposed. Utility Model Content

[0004] The purpose of this application is to provide a waste gas treatment device for paint production, which has the advantages of waste gas treatment function and solves the problems of large footprint of existing biological filter technology and harsh reaction conditions of photocatalytic oxidation technology.

[0005] The waste gas treatment device for paint production provided in this application adopts the following technical solution: it includes a cylinder, a top cover is installed and connected to the top of the cylinder, a connecting pipe is fixedly connected to the top of the top cover, a catalytic oxidation box is fixedly connected to the output end of the connecting pipe, an air inlet pipe is provided on the bottom side of the cylinder, and a coarse filter and an electrostatic dust removal box are sequentially arranged on the surface of the air inlet pipe. The coarse filter is installed at a 45-degree angle in the air inlet pipe. The electrostatic dust removal box is equipped with an electrostatic dust removal module plate. A rotating cylinder is tightly nested inside the top of the cylinder via a bearing. Multiple connecting rods are fixedly connected to the surface of the rotating cylinder. Three connecting rods form a group. One end of each group of connecting rods is fixedly connected to an annular tube. Multiple nozzles are provided on the surface of the annular tube. A vertical pipe is provided inside the rotating cylinder. Three connecting water pipes are fixedly connected to the surface of the rotating cylinder. The two ends of the connecting water pipes are fixedly connected to the surface of the annular tube and the surface of the vertical pipe, respectively. The catalytic oxidation box is equipped with a honeycomb ceramic carrier and a catalyst coating. An air outlet pipe is provided on the side of the catalytic oxidation box. The inner side of the catalytic oxidation box is equipped with a double-layer heat insulation structure. By adopting the above technical solution and setting up a combination structure of coarse filter and electrostatic precipitator, the exhaust gas can be pre-treated before entering the cylinder. The inclined coarse filter can intercept large particles of dust and impurities in the exhaust gas, reducing the load on subsequent treatment. The plates in the electrostatic precipitator can adsorb fine particles through the action of high voltage electrostatics, improving dust removal efficiency. The rotating cylinder can rotate stably under the support of bearings. When the rotating cylinder rotates, it can drive the annular pipe and the nozzle to rotate synchronously. The riser can deliver the treatment liquid to the annular pipe through the water pipe connection. The rotating nozzle can spray the treatment liquid evenly in the cylinder, which can increase the contact area with the exhaust gas and fully dissolve soluble pollutants in the exhaust gas. The honeycomb ceramic carrier in the catalytic oxidation box can provide a large adhesion area for the catalyst coating. The catalyst coating can carry out catalytic oxidation reaction on the exhaust gas after pretreatment and spray absorption at room temperature. The double-layer heat preservation structure can maintain a suitable reaction temperature in the box, ensuring that the oxidation reaction proceeds efficiently and stably. Finally, the purified gas can be discharged through the exhaust pipe.

[0006] Preferably, two conical guide plates are fixedly connected inside the cylinder, and the two conical guide plates are respectively disposed at the bottom of the two annular tubes; By adopting the above technical solution and setting two conical guide plates, the residence time of the exhaust gas in the cylinder can be extended, which can increase the contact opportunity with the treatment liquid and thus improve the spray absorption effect. At the same time, the tilt angle of the conical guide plates can make the sprayed waste liquid flow down the surface of the guide plates quickly, which can avoid residue on the inner wall of the cylinder.

[0007] Preferably, a fixed shell is fixedly connected to the top of the cylinder, a support frame is fixedly connected to the top of the fixed shell, a rotary joint is fixedly connected inside the support frame, the input end of the riser is fixedly connected to the output end of the rotary joint, and an inlet pipe is fixedly connected to the input end of the rotary joint. By adopting the above technical solution and setting up a fixed shell and support frame, a stable installation foundation can be provided for the rotary joint, ensuring that it will not shake or shift during equipment operation.

[0008] Preferably, a solenoid valve is provided on the surface of the liquid inlet pipe; By adopting the above technical solution and setting up a solenoid valve, the on / off state and flow rate of the treatment liquid in the inlet pipe can be precisely controlled, thereby achieving automated regulation of the spraying process.

[0009] Preferably, a first gear is fixedly connected to the surface of the rotating cylinder, a rotary motor is fixedly connected to the top of the fixed shell, the output end of the rotary motor rotates through the top of the fixed shell, and a second gear is fixedly connected thereto, the first gear and the second gear meshing with each other; By adopting the above technical solution, and by setting a rotary motor, a first gear, and a second gear, when the rotary motor starts, its output end can drive the second gear to rotate. Since the first gear and the second gear mesh with each other, the second gear will drive the first gear to rotate synchronously, thereby driving the rotary cylinder to rotate. The rotation of the rotary cylinder can make the spray head move in a circular motion inside the cylinder, which can make the treatment liquid sprayed more evenly into the exhaust gas, expand the contact area between the treatment liquid and the exhaust gas, and improve the exhaust gas treatment efficiency.

[0010] Preferably, two horizontal plates are fixedly connected inside the cylinder, and the rotating cylinder is rotatably connected to the surfaces of the two horizontal plates; By adopting the above technical solution and setting two horizontal plates, a stable installation support can be provided for the rotating cylinder, ensuring that the rotating cylinder remains balanced during rotation and avoiding the impact of shaking on the spraying accuracy of the spray head.

[0011] Preferably, a first annular sealing strip is provided at the top of the cylinder, and a second annular sealing strip is provided at the bottom of the top cover, with the top of the first annular sealing strip engaging inside the second annular sealing strip; By adopting the above technical solution and setting the first and second annular sealing strips, the sealing performance between the cylinder and the top cover can be enhanced, which can prevent the exhaust gas from leaking from the connection during the treatment process and avoid pollution to the surrounding environment.

[0012] Preferably, a fixing ring is fixedly connected to the surface of the cylinder, a plurality of support rods are fixedly connected to the bottom of the fixing ring, and a drain valve is provided at the bottom of the cylinder; By adopting the above technical solution and setting up a fixing ring and support rod, a stable support structure can be provided for the entire waste gas treatment device, ensuring that the device remains stable during operation.

[0013] In summary, this application includes at least one of the following beneficial technical effects: This waste gas treatment device for paint production utilizes a combination of a coarse filter and an electrostatic precipitator. This allows for pretreatment of the waste gas before it enters the cylinder. The inclined coarse filter intercepts large particles of dust and impurities, reducing the load on subsequent treatment processes. The electrostatic precipitator's plates, through high-voltage electrostatic action, adsorb fine particles, improving dust removal efficiency. The rotating cylinder, supported by bearings, rotates stably, driving the annular pipe and nozzles to rotate synchronously. A vertical pipe, connected to a water pipe, delivers treatment liquid to the annular pipe. The rotating nozzles evenly spray the treatment liquid into the cylinder, increasing the contact area with the waste gas and allowing for the complete dissolution of soluble pollutants. The honeycomb ceramic carrier within the catalytic oxidation box provides a large adhesion area for the catalyst coating. This catalyst coating can catalytically oxidize the pretreated and sprayed waste gas at room temperature. A double-layer insulation structure maintains a suitable reaction temperature within the box, ensuring efficient and stable oxidation. Finally, the purified gas is discharged through the outlet pipe. Attached Figure Description

[0014] Figure 1 This is a frontal three-dimensional structural diagram of this application; Figure 2 This is a side-view perspective three-dimensional structural diagram of this application; Figure 3 This is a schematic diagram of the structure in frontal cross-section in this application; Figure 4 for Figure 3 A schematic diagram of the structure at point A in the middle, magnified cross-section. Figure 5 for Figure 3 Enlarged structural diagram at point B.

[0015] In the diagram: 1. Cylinder; 101. Inlet pipe; 102. Coarse filter; 103. Electrostatic dust collector; 104. Drain valve; 105. Horizontal plate; 106. Conical guide plate; 107. First annular sealing strip; 2. Top cover; 201. Connecting pipe; 202. Second annular sealing strip; 203. Rotating cylinder; 204. Connecting rod; 205. Annular pipe; 206. Nozzle; 207. Connecting water pipe; 208. Fixed shell; 209. Rotary joint; 2010. Support frame; 2011. Riser; 2012. Liquid inlet pipe; 2013. Solenoid valve; 2014. First gear; 2015. Rotary motor; 2016. Second gear; 3. Fixed ring; 301. Support rod; 4. Catalytic oxidation box; 401. Honeycomb ceramic carrier; 402. Catalyst coating; 403. Double-layer insulation structure; 404. Outlet pipe. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail below.

[0017] Example 1: A waste gas treatment device for paint production, referring to... Figure 1 , Figure 2 , Figure 3 and Figure 4 The cylinder includes a cylinder 1, a top cover 2 is installed on the top of the cylinder 1, a connecting pipe 201 is fixedly connected to the top of the top cover 2, a catalytic oxidation box 4 is fixedly connected to the output end of the connecting pipe 201, an air inlet pipe 101 is provided on the bottom side of the cylinder 1, and a coarse filter 102 and an electrostatic dust removal box 103 are sequentially provided on the surface of the air inlet pipe 101. A coarse filter 102 is installed at a 45-degree angle in the air inlet pipe 101. An electrostatic precipitator module plate is installed inside the electrostatic precipitator box 103. A rotating cylinder 203 is tightly nested inside the top of the cylinder 1 via a bearing. Multiple connecting rods 204 are fixedly connected to the surface of the rotating cylinder 203, with three connecting rods 204 forming a group. One end of each group of connecting rods 204 is fixedly connected to an annular tube 205. Multiple nozzles 206 are installed on the surface of the annular tube 205. A vertical pipe 2011 is installed inside the rotating cylinder 203. A vertical pipe 2011 is fixedly connected to the surface of the rotating cylinder 203. Three connecting water pipes 207 are connected, with their ends fixedly connected to the surface of the annular pipe 205 and the surface of the vertical pipe 2011, respectively. The catalytic oxidation box 4 contains a honeycomb ceramic carrier 401 and a catalyst coating 402. An exhaust pipe 404 is located on the side of the catalytic oxidation box 4, and a double-layer insulation structure 403 is installed on the inner side of the catalytic oxidation box 4. By using a combination of a coarse filter 102 and an electrostatic precipitator 103, pretreatment can be performed on the exhaust gas before it enters the cylinder 1. The coarse filter is installed at an angle. 102 can intercept large particles of dust and impurities in the exhaust gas, reducing the load on subsequent treatment. The plates in the electrostatic precipitator 103 can adsorb fine particles through high-voltage electrostatic action, improving dust removal efficiency. The rotating cylinder 203 can rotate stably under the support of bearings. When the rotating cylinder 203 rotates, it can drive the annular pipe 205 and the nozzle 206 to rotate synchronously. The riser 2011 can deliver treatment liquid to the annular pipe 205 through the water pipe 207. The rotating nozzle 206 can spray the treatment liquid evenly inside the cylinder 1, which can increase the contact area with the exhaust gas and fully dissolve soluble pollutants in the exhaust gas. The honeycomb ceramic carrier 401 in the catalytic oxidation box 4 can provide a large adhesion area for the catalyst coating 402. The catalyst coating 402 can carry out catalytic oxidation reaction on the exhaust gas after pretreatment and spray absorption at room temperature. The double-layer heat preservation structure 403 can maintain a suitable reaction temperature inside the box, ensuring that the oxidation reaction is carried out efficiently and stably. Finally, the purified gas can be discharged through the exhaust pipe 404.

[0018] Please see Figure 3 and Figure 4Two conical guide plates 106 are fixedly connected inside the cylinder 1. These two guide plates 106 are respectively positioned at the bottom of the two annular pipes 205. By setting the two conical guide plates 106, the residence time of the exhaust gas inside the cylinder 1 can be extended, increasing the contact opportunity with the treated liquid, thereby improving the spray absorption effect. Simultaneously, the tilt angle of the conical guide plates 106 allows the sprayed waste liquid to flow quickly down the surface of the guide plates, preventing residue on the inner wall of the cylinder 1. A fixed shell 208 is fixedly connected to the top of the cylinder 1, and a support frame 2010 is fixedly connected to the top of the fixed shell 208. A rotary joint 209 is fixedly connected inside the 010. The input end of the riser 2011 is fixedly connected to the output end of the rotary joint 209. The input end of the rotary joint 209 is fixedly connected to the liquid inlet pipe 2012. By setting the fixed shell 208 and the support frame 2010, a stable installation foundation can be provided for the rotary joint 209, which can ensure that it will not shake or shift during equipment operation. A solenoid valve 2013 is set on the surface of the liquid inlet pipe 2012. By setting the solenoid valve 2013, the on / off state and flow rate of the treatment liquid in the liquid inlet pipe 2012 can be precisely controlled, realizing the automatic adjustment of the spraying process.

[0019] Please see Figure 3 and Figure 4 A first gear 2014 is fixedly connected to the surface of the rotating cylinder 203. A rotary motor 2015 is fixedly connected to the top of the fixed shell 208. The output end of the rotary motor 2015 rotates through the top of the fixed shell 208 and is fixedly connected to a second gear 2016. The first gear 2014 and the second gear 2016 mesh with each other. By setting up the rotary motor 2015, the first gear 2014, and the second gear 2016, when the rotary motor 2015 starts, its output end can drive the second gear 2016 to rotate. Since the first gear 2014 and the second gear 2016 mesh with each other, the second gear 2016 will drive the first gear 2014 to rotate. A gear 2014 rotates synchronously, thereby driving the rotating cylinder 203 to rotate. The rotation of the rotating cylinder 203 enables the spray head to move in a circular motion inside the cylinder 1, allowing the treatment liquid to be sprayed more evenly into the exhaust gas, increasing the contact area between the treatment liquid and the exhaust gas, and improving the exhaust gas treatment efficiency. Two horizontal plates 105 are fixedly connected inside the cylinder 1, and the rotating cylinder 203 is rotatably connected to the surface of the two horizontal plates 105. By setting the two horizontal plates 105, a stable installation support can be provided for the rotating cylinder 203, ensuring that the rotating cylinder 203 remains balanced during rotation and avoiding the impact of shaking on the spraying accuracy of the spray head.

[0020] Please see Figure 1 , Figure 3 and Figure 5The top of the cylinder 1 is provided with a first annular sealing strip 107, and the bottom of the top cover 2 is provided with a second annular sealing strip 202. The top of the first annular sealing strip 107 is snapped into the inside of the second annular sealing strip 202. By setting the first annular sealing strip 107 and the second annular sealing strip 202, the sealing performance between the cylinder 1 and the top cover 2 can be enhanced, preventing the exhaust gas from leaking from the connection during the treatment process and avoiding pollution to the surrounding environment. A fixing ring 3 is fixedly connected to the surface of the cylinder 1, and multiple support rods 301 are fixedly connected to the bottom of the fixing ring 3. A drain valve 104 is provided at the bottom of the cylinder 1. By setting the fixing ring 3 and the support rods 301, a stable support structure can be provided for the entire exhaust gas treatment device, ensuring that the device remains stable during operation.

[0021] The implementation principle of this application embodiment is as follows: When the exhaust gas generated during the paint production process enters the device through the air inlet pipe 101, it first passes through the coarse filter 102 installed at a 45-degree angle. Utilizing its special tilt angle and filter material, it can initially intercept large particles of dust and impurities in the exhaust gas. Subsequently, the exhaust gas enters the electrostatic dust removal box 103. The electrostatic dust removal module plates inside adsorb and remove fine particles in the exhaust gas through high-voltage electrostatic action, thus completing the pretreatment stage. The pretreated exhaust gas enters the cylinder 1. At this time, the rotary motor 2015 starts, which drives the second gear 2016 to rotate. The first gear 2014, which meshes with the second gear 2016, rotates accordingly, which in turn drives the rotary cylinder 203 to rotate stably under the support of the two horizontal plates 105. Through the connecting rod 204, the annular pipe 205 can be driven to rotate synchronously. At the same time, the liquid inlet pipe 2012 controls the flow rate of the treatment liquid through the solenoid valve 2013. The treatment liquid enters the riser pipe 2011 through the rotary joint 209, and is then transported to the annular pipe 205 through the connecting water pipe 207. Finally, it is evenly sprayed out from the rotating nozzle 206, making full contact with the rising exhaust gas. The soluble pollutants in the exhaust gas are absorbed by the treatment liquid. The two conical guide plates 106 prolong the residence time of the exhaust gas in the cylinder 1, further improving the spray absorption effect. The sprayed waste liquid flows down the surface of the guide plates and can finally be discharged through the drain valve 104 at the bottom of the cylinder 1. After being sprayed, the waste gas enters the catalytic oxidation box 4 through the connecting pipe 201 at the top of the top cover 2. Under the action of the honeycomb ceramic carrier 401 and the catalyst coating 402, the harmful substances in the waste gas can undergo a catalytic oxidation reaction and be converted into harmless substances. The purified gas is discharged through the outlet pipe 404. Throughout the process, the first annular sealing strip 107 and the second annular sealing strip 202 can prevent waste gas leakage, and the fixing ring 3 and the support rod 301 can ensure the overall stable operation of the device.

Claims

1. A waste gas treatment device for paint production, comprising a cylinder (1), characterized in that: A top cover (2) is installed and connected to the top of the cylinder (1). A connecting pipe (201) is fixedly connected to the top of the top cover (2). A catalytic oxidation box (4) is fixedly connected to the output end of the connecting pipe (201). An air inlet pipe (101) is provided on the bottom side of the cylinder (1). A coarse filter (102) and an electrostatic dust removal box (103) are arranged sequentially on the surface of the air inlet pipe (101). The coarse filter (102) is installed at a 45-degree angle in the air inlet pipe. The electrostatic precipitator box (103) contains an electrostatic precipitator module plate. A rotating cylinder (203) is tightly nested inside the top of the cylinder (1) via a bearing. Multiple connecting rods (204) are fixedly connected to the surface of the rotating cylinder (203). Three connecting rods (204) form a group. One end of each group of connecting rods (204) is fixedly connected to an annular tube (205). Multiple nozzles (206) are provided on the surface of the annular tube (205). The rotating cylinder... The cylinder (203) is equipped with a riser (2011). Three connecting water pipes (207) are fixedly connected to the surface of the rotating cylinder (203). The two ends of the connecting water pipes (207) are fixedly connected to the surface of the annular pipe (205) and the surface of the riser (2011), respectively. The catalytic oxidation box (4) is equipped with a honeycomb ceramic carrier (401) and a catalyst coating (402). The catalytic oxidation box (4) is equipped with an exhaust pipe (404) on the side. The catalytic oxidation box (4) is equipped with a double-layer heat preservation structure (403) on the inner side.

2. The waste gas treatment device for paint production according to claim 1, characterized in that: The cylinder (1) has two conical guide plates (106) fixedly connected inside, and the two conical guide plates (106) are respectively set at the bottom of the two annular pipes (205).

3. The waste gas treatment device for paint production according to claim 1, characterized in that: The top of the cylinder (1) is fixedly connected to a fixed shell (208), the top of the fixed shell (208) is fixedly connected to a support frame (2010), the inside of the support frame (2010) is fixedly connected to a rotary joint (209), the input end of the riser (2011) is fixedly connected to the output end of the rotary joint (209), and the input end of the rotary joint (209) is fixedly connected to an inlet pipe (2012).

4. The waste gas treatment device for paint production according to claim 3, characterized in that: A solenoid valve (2013) is provided on the surface of the liquid inlet pipe (2012).

5. The waste gas treatment device for paint production according to claim 3, characterized in that: A first gear (2014) is fixedly connected to the surface of the rotating cylinder (203), and a rotary motor (2015) is fixedly connected to the top of the fixed shell (208). The output end of the rotary motor (2015) rotates through the top of the fixed shell (208) and is fixedly connected to a second gear (2016). The first gear (2014) and the second gear (2016) mesh with each other.

6. The waste gas treatment device for paint production according to claim 1, characterized in that: The cylinder (1) has two horizontal plates (105) fixedly connected inside, and the rotating cylinder (203) is rotatably connected to the surface of the two horizontal plates (105).

7. The waste gas treatment device for paint production according to claim 1, characterized in that: The top of the cylinder (1) is provided with a first annular sealing strip (107), and the bottom of the top cover (2) is provided with a second annular sealing strip (202). The top of the first annular sealing strip (107) is engaged inside the second annular sealing strip (202).

8. The waste gas treatment device for paint production according to claim 1, characterized in that: The surface of the barrel (1) is fixedly connected with a fixed ring (3), the bottom of the fixed ring (3) is fixedly connected with a plurality of supporting rods (301), and the bottom of the barrel (1) is provided with a blowdown valve (104).

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