Electroplating waste gas treatment system

Abstract

The present invention belongs to the technical field of waste gas purification, specifically an electroplating waste gas treatment system, including a collecting pipe, a pretreatment module, a spray purification module and a monitoring and emission module. The collecting pipe is used to collect the waste gas generated during the electroplating process, and then undergoes dust removal and cooling treatment in the pretreatment module, and finally undergoes absorption and purification treatment through the spray purification module. The purified waste gas is sampled and detected by the monitoring and emission module, and is discharged after being determined to meet the emission standards. The present application increases the way for the waste gas to be purified to the inside of the absorption zone and contact with the filler particles by arranging a diffusion tube directly connected to the lower area of ​​the packing layer, and also increases the degree of contact between the electroplating waste gas and the purified water mist in the gaps between the filler particles, so that the electroplating waste gas is more fully subjected to the absorption and purification effect, thereby improving the purification efficiency of the electroplating waste gas.

Description

Technical Field

[0001] The present invention belongs to the technical field of waste gas purification, in particular to an electroplating waste gas treatment system. Background Art

[0002] As important industrial production bases, electroplating plants inevitably generate a certain amount of waste gas during their production processes. If these gases are released directly into the atmosphere without treatment, they can cause serious environmental pollution and even threaten human health. Therefore, effectively treating waste gas generated by electroplating plants has become a key issue facing current environmental protection efforts.

[0003] Electroplating plant waste gases primarily include dust-laden, acidic, and organic gases. Dust-laden gases primarily originate from metal dust generated during the electroplating process; acidic gases are generated by the volatilization of acidic solutions used in the electroplating process; and organic gases result from the volatilization of organic solvents and additives used in the electroplating process. These gases contain not only harmful metal ions, acidic substances, and organic compounds, but may also contain volatile organic compounds (VOCs), posing a serious threat to the environment and human health.

[0004] Currently, the commonly used equipment for treating electroplating waste gas is the purification spray tower. The waste gas comes into contact with the purified water mist flowing upward and downward in the packing layer inside the spray tower. The acidic waste gas is neutralized by spraying the alkaline solution in the purification liquid, and the acidic pollutant components in the waste gas are adjusted. In this process, because the part near the bottom of the packing layer is in contact with the upward waste gas more, the residual dust and harmful substances in the waste gas are concentrated in the bottom area of ​​the packing layer, resulting in the packing in the bottom area of ​​the packing layer being prone to clumping, which reduces the permeability of the bottom of the packing layer, hinders the waste gas from flowing upward and contacting the purification liquid, and affects the purification efficiency of the electroplating waste gas. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the present invention proposes an electroplating waste gas treatment system.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: the present invention proposes an electroplating waste gas treatment system, including a collection pipe, a pretreatment module, a spray purification module and a monitoring and emission module. The collection pipe is used to collect waste gas generated during the electroplating process, which is then subjected to dust removal and temperature reduction treatment in the pretreatment module and finally to absorption and purification treatment in the spray purification module. The purified waste gas is sampled and tested by the monitoring and emission module, and is discharged after it is determined to meet the emission standards.

[0007] The spray purification module includes a spray tower, an air inlet is provided on the side wall of the spray tower near the bottom, and the air inlet is connected to the collection pipe; a recovery area is provided in the area below the air inlet inside the spray tower, and the recovery area is connected to a circulating water tank provided outside, and a dosing device is provided on one side of the circulating water tank;

[0008] The top of the spray tower is provided with an air outlet pipe, which is communicated with the spray purification module; a plurality of purification zones are evenly arranged in the area between the air inlet and the air outlet pipe inside the spray tower; a packing layer is provided inside the purification zone, and a spray pipe is provided on the upper side of the packing layer, which is communicated with the circulating water tank;

[0009] The packing layer includes a double layer of sieve plates arranged in an upper and lower layer, and the absorption area between the sieve plates is filled with filler particles; a diffusion tube is arranged inside the absorption area, the top of the diffusion tube is closed, and diffusion holes are evenly and horizontally arranged on the side wall, and the bottom opening of the diffusion tube extends vertically downward and passes through the lower sieve plate of the absorption area.

[0010] Preferably, a diffusion tube is provided on the outer surface of the diffusion tube side wall at a position corresponding to the diffusion hole, the diffusion tube is communicated with the diffusion hole, the end of the diffusion tube extends away from the diffusion tube, and the diffusion tube is a tapered tube structure.

[0011] Preferably, a telescopic device is provided on the upper side of the packing layer, and the telescopic device is connected to the inner wall of the purification area; the telescopic end of the telescopic device is connected to the driving rod provided at the middle position of the top of the diffusion tube, and the driving rod is slidably connected to the sieve plate at the top of the packing layer, and the diffusion tube is slidably embedded in the limiting ring provided on the sieve plate on the lower side of the packing layer.

[0012] Preferably, the portion of the diffuser tube close to the driving rod is a conical tube structure, and the corresponding connection portion between the diffuser tube and the sieve plate on the lower side is a straight tube structure; the diffusion tubes are concentrated in the conical portion of the outer surface of the diffuser tube, and the ends of the diffusion tubes are inclined upward.

[0013] Preferably, cutting plates are provided on the upper and lower sides of the outer surface of the diffusion tube, and the ends of the edge portions of the cutting plates are tapered structures.

[0014] Preferably, the connection portion between the spreading tube and the diffusion tube is made of elastic material, a vibrator is provided inside the driving rod, and the driving rod and the telescopic end of the telescopic device are elastically connected.

[0015] Preferably, the bottom end of the driving rod slides through the top of the diffuser and is connected to the upper surface of the slide provided inside the diffuser; the slide slide is slidably embedded in the straight tube portion inside the diffuser, and a lower limit plate is provided on the inner wall of the straight tube portion of the diffuser near the bottom, and an upper limit plate is provided near the top conical tube portion, and air guide holes are evenly provided on the slide, and the lower limit plate and the upper limit plate are both filter plate structures.

[0016] Preferably, the air guide holes are all tapered hole structures, and the small ends of the air guide holes are located on the upper side of the slide.

[0017] Preferably, a limiting rod is vertically provided at a position inside the diffuser corresponding to the air guide hole, the top of the limiting rod is connected to the lower surface of the upper limit plate, and the bottom of the limiting rod slides through the air guide hole on the slide and is connected to the upper surface of the lower limit plate on the lower side, and air guide grooves are evenly provided on the outer surface of the limiting rod near the bottom.

[0018] Preferably, an annular upper limit block and a lower limit block are respectively provided on the outer surface of the diffusion tube, the upper limit block is located inside the absorption zone, and the lower limit block is located at the lower side of the packing layer.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. An electroplating waste gas treatment system of the present invention is directly connected to the lower area of ​​the packing layer by arranging a diffusion tube, so that the waste gas flowing upward can directly flow in through the bottom opening of the diffusion tube, and then directly enter the absorption area, and then flow out laterally through the diffusion holes evenly arranged on the side wall of the diffusion tube, thereby increasing the way for the purified waste gas to contact the filler particles in the absorption area; the top of the diffusion tube is closed, making it difficult for the downward clean water mist to enter the interior of the diffusion tube, thereby preventing the purified water mist and impurities adsorbed in the filler particles from entering the interior of the diffusion tube and affecting the smooth flow of the diffusion tube.

[0021] The electroplating waste gas treatment system of the present invention has diffuser holes uniformly distributed laterally, so that the inflowing electroplating waste gas passes through the diffuser holes evenly into the gap area between the filler particles inside the absorption zone, thereby increasing the contact degree between the electroplating waste gas and the purified water mist in the gap between the filler particles, so that the electroplating waste gas is absorbed and purified more fully; and the electroplating waste gas flowing out of the diffuser holes flows laterally, which is different from the vertical flow of waste gas passing through the sieve plate. By changing the flow direction of the waste gas, the flow path of the laterally flowing waste gas inside the absorption zone is extended, and the residence time inside the absorption zone is increased, thereby increasing the contact degree with the purified water mist and improving the purification efficiency of the electroplating waste gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 It is a perspective view of the present invention;

[0024] Figure 2 It is a partial cross-sectional view of the present invention in the front view direction;

[0025] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle;

[0026] Figure 4 is a three-dimensional diagram of the diffuser tube of the present invention;

[0027] Figure 5 is a cross-sectional view of the diffuser tube of the present invention;

[0028] Figure 6 yes Figure 5 A partial enlarged view of point B in the middle.

[0029] In the figure: collecting pipe 1, spray tower 2, air inlet 21, recovery area 22, circulating water tank 23, dosing equipment 24, air outlet pipe 25, purification area 26, spray pipe 261, packing layer 27, sieve plate 271, absorption area 272, limiting ring 273, diffuser 3, diffusion hole 31, spreading pipe 32, cutting plate 321, telescopic device 33, driving rod 34, slide plate 35, lower clamping block 351, upper clamping block 352, air guide hole 353, limiting rod 36, air guide groove 361, upper limit block 37, lower limit block 38. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings shown in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Example 1:

[0032] An electroplating waste gas treatment system, as shown in the accompanying drawings of the specification Figures 1-6 As shown, it includes a collection pipe 1, a pretreatment module, a spray purification module and a monitoring and emission module. The collection pipe 1 is connected to the electroplating equipment to collect the waste gas generated during the electroplating process. To address the high temperature and dust problems of the electroplating waste gas, the pretreatment module can use activated carbon adsorption purification equipment or wet dust collector and other purification equipment, so that the dust is removed and the temperature is reduced by the pretreatment module.

[0033] The emission monitoring module includes existing gas pollutant and dust concentration detection equipment, as well as emission pipelines. Therefore, at the end of the purification process, the waste gas treated by the spray purification module will pass through the emission monitoring module. The emission monitoring module can detect the purified waste gas and discharge it normally if it meets the emission standards. If it does not meet the emission standards, further purification treatment is required.

[0034] The spray purification module includes a spray tower 2, and an air inlet 21 is provided on the side wall of the spray tower 2 near the bottom. The air inlet 21 is connected to the collection pipe 1. A recovery area 22 is provided in the area below the air inlet 21 inside the spray tower 2. The recovery area 22 is connected to a circulating water tank 23 provided on the outside. The recovery area 22 can collect the sprayed purified liquid, which is then purified and input into the circulating water tank 23 to achieve the recycling of the purified liquid. The specific structure and working mechanism are all existing technologies and will not be described in detail here.

[0035] A dosing device 24 is provided on one side of the circulating water tank 23. The dosing device 24 contains a treatment agent for the waste gas. For example, electroplating waste gas is an acidic pollutant gas. Therefore, the treatment agent can be selected to neutralize the acidic pollutant gas. During the purification operation, the treatment agent is mixed into the circulating water tank 23 to improve the absorption and purification efficiency of the incoming waste gas.

[0036] An air outlet pipe 25 is provided at the top of the spray tower 2, which is connected to the spray purification module; a plurality of purification zones 26 are evenly arranged in the area between the air inlet 21 and the air outlet pipe 25 of the spray tower 2, and a packing layer 27 is provided on the side wall of the purification zone 26. A spray pipe 261 is provided on the upper side of the packing layer 27, and the spray pipe 261 is connected to the circulating water tank 23;

[0037] The packing layer 27 includes a double layer of sieve plates 271, each mounted on the inner wall of the spray tower 2 and uniformly provided with sieve holes to facilitate the vertical passage of electroplating waste gas. The area between the double layers of sieve plates 271 is an absorption zone 272, which is filled with filler particles. A diffusion tube 3 is provided inside the absorption zone 272. The top of the diffusion tube 3 is closed, and the side wall is uniformly provided with diffusion holes 31. The bottom opening of the diffusion tube 3 extends vertically downward and passes through the lower sieve plate 271 of the absorption zone 272.

[0038] Specific work flow: connect the collection pipe 1 to the electroplating tank and other electroplating equipment, and use the exhaust fan to absorb the waste gas generated during the electroplating process, thereby reducing the waste gas concentration inside the processing workshop, avoiding the accumulation of waste gas in the processing workshop, improving the processing environment for processing workers, and reducing the pollution of the atmospheric environment caused by the leakage of electroplating waste gas;

[0039] The waste gas generated by the electroplating workshop, such as the waste gas generated by the galvanizing workshop, contains various acidic gases and dust and other pollutants. Therefore, it is necessary to set a pretreatment module in the middle part of the collection pipe 1 to perform preliminary treatment on the dust impurities contained in the electroplating waste gas through activated carbon adsorption purification equipment, wet dust collector or bag dust collector and other equipment. In addition, during the pre-processing process, the heat in the waste gas is dissipated to reduce the temperature of the electroplating waste gas, so that the electroplating waste gas can enter the Penglin Tower of the spray purification module for spray purification treatment;

[0040] Specifically, the electroplating waste gas is sent into the air inlet 21 through the connected collection pipe 1, then flows from bottom to top inside the spray tower 2, passes through several purification zones 26, undergoes adsorption purification treatment, and finally flows out from the top outlet pipe 25. The purified waste gas is sampled and tested at the monitoring and emission module. When the purified waste gas meets the emission standard, it is discharged normally; if the test result is unqualified, the purified waste gas does not meet the emission standard and needs further purification treatment, thereby reducing pollution to the ambient atmosphere and complying with the theme of green production;

[0041] When the waste gas passes through the purification zone 26, it first enters the packing layer 27 inside the purification zone 26, and penetrates into the gaps between the packing particles inside the intermediate absorption zone 272 through the sieve holes evenly distributed on the sieve plate 271. At this time, the upward flow speed of the waste gas slows down and is evenly dispersed in the gaps between the packing particles. The spray pipe 261 located on the packing layer 27 atomizes the cleaning liquid of the purification agent mixed in the circulating water tank 23, and then flows out from the nozzle on the lower side, forming a scene where the downward purified water mist collides with the electroplating waste gas flowing from the bottom to the top, so that the waste gas and the purified water mist are fully in contact, fully absorb the harmful components in the waste gas, capture the solid particles therein, such as the residual dust therein, and neutralize the acidic components therein, thereby reducing the harm of the waste gas.

[0042] The downward purified water mist also enters the gaps between the filler particles in the absorption zone 272. The filler particles can slow down the speed at which the purified water mist escapes, thereby increasing the time the purified water mist stays in the absorption zone 272. The purified water mist in the gaps between the filler particles is fully in contact with the electroplating waste gas that permeates upward, thereby improving the utilization rate of the purified water mist and further improving the efficiency of absorbing and purifying harmful components in the electroplating waste gas, thereby more fully purifying the electroplating waste gas.

[0043] Furthermore, in order to prevent the filler particles mixed with the purified water mist from becoming compacted due to absorbing too many impurities, thereby preventing the electroplating waste gas from entering the filler layer 27 from the lower sieve plate 271, thereby affecting the permeability of the electroplating waste gas; a diffusion pipe 3 is provided to be directly connected to the lower area of ​​the filler layer 27, so that the upward-flowing waste gas can flow directly through the bottom opening of the diffusion pipe 3, and then directly enter the absorption area 272, and then flow out laterally through the diffusion holes 31 evenly arranged on the side wall of the diffusion pipe 3, thereby increasing the path for the purified waste gas to contact the filler particles in the absorption area 272; the top of the diffusion pipe 3 is closed, making it difficult for the downward-flowing purified water mist to enter the interior of the diffusion pipe 3, thereby preventing the purified water mist and impurities adsorbed in the filler particles from entering the interior of the diffusion pipe 3, thereby affecting the smooth flow of the diffusion pipe 3;

[0044] In addition, the diffusion holes 31 are evenly distributed laterally, so that the electroplating waste gas flowing in can evenly enter the gap area between the filler particles inside the absorption zone 272 through the diffusion holes 31, thereby increasing the contact degree between the electroplating waste gas and the purified water mist in the gap between the filler particles, so that the electroplating waste gas is more fully absorbed and purified; and the electroplating waste gas flowing out of the diffusion holes 31 flows laterally, which is different from the vertical flow waste gas passing through the sieve plate 271. By changing the flow direction of the waste gas, the flow path of the laterally flowing waste gas in the absorption zone 272 is extended, and the residence time in the absorption zone 272 is increased, thereby increasing the contact degree with the purified water mist and improving the purification efficiency; further, the waste gas flowing laterally and vertically inside the absorption zone 272 impact each other, causing the filler particles inside the absorption zone 272 to vibrate, reducing the situation where the filler particles adsorb impurities and adhere to each other, ensuring the passability of the absorption zone 272, and improving the purification efficiency of the electroplating waste gas.

[0045] Example 2:

[0046] On the basis of the first embodiment, a diffusion tube 32 is provided on the outer surface of the side wall of the diffusion tube 3 at a position corresponding to the diffusion hole 31. The diffusion tube 32 is communicated with the diffusion hole 31. The end of the diffusion tube 32 extends away from the diffusion tube 3 and has a tapered tube structure.

[0047] Specific workflow: Based on the specific workflow in Example 1, after the electroplating waste gas enters the diffuser tube 3, it flows out from the diffuser tubes 32 evenly arranged on the side wall. Because the ends of the diffuser tubes 32 extend laterally into the gaps between the surrounding fillers, the waste gas liquid flows through the diffuser tubes 32 in the direction away from the diffuser tube 3, thereby improving the diffusion degree of the outflowing waste gas. The waste gas flowing out of the diffuser tube 3 is diffused more evenly within the absorption zone 272, thereby more fully contacting the filler particles and the purified water mist dispersed in the gap area, so that the pollutants in the waste gas are more fully absorbed.

[0048] Through the action of the diffusion tube 3 and the distribution tube 32, the exhaust gas can fully enter the different areas inside the absorption zone 272, thereby improving the utilization efficiency of the filler particles in different areas of the absorption zone 272. This also avoids the exhaust gas from concentrating in contact with the area near the bottom of the absorption zone 272, resulting in excessive concentration of impurities in the bottom area, and suppresses the tendency of filler particles in the bottom area of ​​the absorption zone 272 to agglomerate due to the concentration of impurities in the gaps and mutual adhesion, thereby ensuring the overall passability of the absorption zone 272.

[0049] Example 3:

[0050] On the basis of the second embodiment, a telescopic device 33 is provided on the upper side of the packing layer 27. The base of the telescopic device 33 is connected to the inner wall of the spray tower 2, and the telescopic device 33 corresponds to the evenly distributed diffusion tubes 3 inside the spray tower 2. For some diffusion tubes 3 in the middle area away from the inner wall of the spray tower 2, they can also be connected to the telescopic end of the telescopic device 33 at the inner wall through a connecting rod, so as to facilitate the synchronous vertical reciprocating movement of the diffusion tubes 3 in the same packing layer 27; the telescopic device 33 here can use an existing electric telescopic rod device and is waterproof; the telescopic end of the telescopic device 33 is connected to a driving rod 34 provided at the middle position of the top of the diffusion tube 32, the driving rod 34 passes through the sieve plate 271 at the top of the packing layer 27 and is slidably connected, and the diffusion tube 3 slides through the limit ring 273 provided on the lower sieve plate 271;

[0051] Specific working process: Based on the specific working process in Example 2, when the permeability of the packing layer 27 is affected due to excessive impurities adsorbed therein, the telescopic device 33 is activated to drive the drive rod 34 to move vertically back and forth, thereby driving the diffuser tube 3 located inside the absorption zone 272 to slide vertically; during the vertical sliding process of the diffuser tube 3, the bottom of the diffuser tube 3 is kept below the lower sieve plate 271 and is slidably connected to the limit ring 273, so that the exhaust gas from the lower side can be stably introduced into the absorption zone 272;

[0052] At the same time, the vertically reciprocating diffusion tube 3 stirs the filler particles inside the absorption zone 272, accelerates the flow of filler particles in the vertical direction, and causes exchange between filler particles in different areas on the upper and lower sides of the absorption zone 272, so that the filler particles are fully utilized; the distribution tubes 32 evenly distributed on the surface of the vertically sliding diffusion tube 3 expand the range of stirring effect on the filler particles, so that the influence range of the diffusion tube 3 is increased, and when the filler particles are pressed through the gaps in the distribution tubes 32, the stirred filler particles inside the absorption zone 272 are prompted to move relative to each other, so that the filler particles with a tendency to agglomerate are impacted and refined and dispersed, and the impurities in the gap area flow out of the absorption zone 272 with the downwardly penetrating cleaning liquid under the stirring action, and then enter the circulating water tank 23 at the bottom for purification and separation treatment.

[0053] Example 4:

[0054] Based on the third embodiment, the upper and lower parts of the diffuser 3 have different structures. The upper portion near the drive rod 34 is a tapered tube structure, while the lower portion of the diffuser 3 corresponding to the lower sieve plate 271 is a straight tube structure. The diffusion tubes 32 are concentrated in the tapered portion of the outer surface of the diffuser 3, with the ends of the diffusion tubes 32 tilted upward. Cutting plates 321 are provided on the upper and lower sides of the outer surface of the diffusion tube 32. The ends of the cutting plates 321 away from the edge of the diffusion tube 32 are tapered and sharp.

[0055] The connection between the spreading tube 32 and the diffusion tube 3 is made of elastic material. A vibrator is provided inside the driving rod 34. Here, the vibrator can be a micro-vibration motor. The driving rod 34 and the telescopic end of the telescopic device 33 are elastically connected. The connection can be made of elastic material at the top of the driving rod 34 and the telescopic device 33.

[0056] Specific workflow: Based on the specific workflow in Example 3, during the vertical upward sliding of the diffusion tube 32, the outer inclined surface of the upper conical tube portion contacts the filler particles in the upper area, so that the filler particles in the upper area are subjected to an oblique upward pressure, which causes the filler particles near the bottom area inside the absorption zone 272 to be pushed. As the upwardly moving diffusion tube 32 slides upward, the outer conical inclined surface of the conical tube portion of the diffusion tube 3 pushes the filler particles upward while squeezing the contacted filler particles, causing them to be subjected to a force pushing laterally in the surrounding direction, thereby enhancing the fluidity of the filler particles inside the absorption zone 272 and reducing the problem of filler particles agglomerating due to excessive concentration of impurities in local areas inside the absorption zone 272;

[0057] Furthermore, cutting plates 321 are provided on the upper and lower sides of the outer surface of the spreading tube 32. In this way, when the spreading tube 32 contacts filler particles with a tendency to agglomerate during the vertical movement, it will be impacted by the sharp end of the edge of the cutting plate 321. In addition, after the vibrator is started, it drives the vibration of the spreading tube 32 and the diffusion tube 3, further causing the contacting agglomerated filler particles to be broken up and refined, and fully diffused to different areas, thereby effectively reducing the problem of filler agglomeration, ensuring the permeability of the filler layer 27, and improving the purification efficiency of the electroplating waste gas.

[0058] Embodiment 5:

[0059] On the basis of the fourth embodiment, the bottom end of the driving rod 34 slides through the top of the diffuser 3 and is connected to the upper surface of the slide 35 provided inside the diffuser 3. The slide 35 is a circular plate structure; the slide 35 slides and is embedded in the straight tube portion inside the diffuser 3, and a lower limit plate 351 is provided on the inner wall of the straight tube portion of the diffuser 3 near the bottom, and an upper limit plate 352 is provided near the top conical tube portion. Air guide holes 353 are evenly provided on the slide 35. The lower limit plate 351 and the upper limit plate 352 are both filter plate structures, and are evenly provided with filter holes to facilitate the entry and passage of electroplating waste gas;

[0060] Specific workflow: Based on the specific workflow in Example 4, in order to increase the penetration range of exhaust gas into the absorption zone 272, a sliding connection is provided between the drive rod 34 and the end of the diffuser 3. The drive rod 34 passes through the top of the diffuser 3 and is connected to the slide 35 inside the diffuser 3. The circular slide 35 is slidably connected to the straight tube portion of the diffuser 3. Thus, in the initial state, the slide 35 is located below the straight tube portion near the lower limit plate 351. When the exhaust gas flows upward, it passes through the air guide holes 353 located on the slide 35 and enters the upper area of ​​the slide 35. Then, it penetrates through the diffuser 3 and the distribution pipe 32 evenly arranged on the side wall and flows to the areas on both sides of the absorption zone 272.

[0061] When the telescopic device 33 is started and drives the driving rod 34 to move upward, the slide plate 35 first slides upward relative to the diffuser 3, so that the area inside the diffuser 3 located on the upper side of the slide plate 35 is pressurized, and the upper side opening of the air guide hole 353 is a small end, and the flow is blocked. The exhaust gas flowing into the upper area is compressed and accelerated to flow out through the diffusion pipe 32. At this time, the pressure of the exhaust gas flowing out is increased, the impact is enhanced, and it can cover a larger area, and has a stronger impact and stirring effect on the surrounding filler particles, thereby improving the fluidity of the filler particles inside the absorption area 272 during the vertical movement of the diffuser 3; as the slide plate 35 moves upward, it rubs against the inner wall of the diffuser 3, and the slide plate 35 moves upward to contact the upper limit plate 352 and pushes the diffuser 3 upward to move synchronously with the driving rod 34, thereby achieving stirring of the filler particles inside the absorption area 272;

[0062] After rising to the highest position, when the telescopic device 33 controls the driving rod 34 to reset downward, the slide 35 slides downward relative to the inner wall of the diffuser 3 until the slide 35 contacts the lower block 351, pushing the diffuser 3 and the driving rod 34 to move downward synchronously. At this time, the volume of the area above the slide 35 inside the diffuser 3 increases, and the air pressure decreases. The negative pressure causes the exhaust gas in the area below the slide 35 to flow into the area above the slide 35 at an accelerated rate, and the bottom opening of the air guide hole 353 is large, which accelerates the above process, making it convenient to squeeze the exhaust gas in the upper area again during the subsequent upward movement. In this way, during the repeated reciprocating sliding of the driving rod 34, the inflowing exhaust gas is accelerated to penetrate into the gaps between the filler particles around the diffuser 3 during the vertical reciprocating sliding of the slide 35, thereby improving the purification efficiency of the exhaust gas.

[0063] Example 6:

[0064] Based on the fifth embodiment, a limit rod 36 is vertically provided at a position inside the diffuser 3 corresponding to the air guide hole 353. The top of the limit rod 36 is connected to the lower surface of the upper limit plate 352. The bottom of the limit rod 36 slides through the air guide hole 353 on the slide plate 35 and is connected to the upper surface of the lower limit plate 351 below. The outer surface of the limit rod 36 near the bottom is evenly provided with air guide grooves 361.

[0065] The outer surface of the diffuser 3 is respectively provided with an annular upper limit block 37 and a lower limit block 38. The upper limit block 37 is located inside the absorption area 272, and the lower limit block 38 is located on the lower side of the packing layer 27. The distance between the upper limit block 37 and the lower limit block 38 is smaller than the distance between the upper limit plate 352 and the lower limit plate 351. In the vertical direction, the upper limit block 37 and the lower limit block 38 limit the vertical sliding range of the diffuser 3, ensuring that the slide plate 35 can slide smoothly relative to the diffuser 3 while effectively avoiding the problem of the diffuser 3 detaching due to excessive sliding distance.

[0066] Specific workflow: Based on the specific workflow in Example 5, in the initial state before the driving rod 34 is activated, the portion of the limiting rod 36 where the air guide groove 361 is provided coincides with the small end of the air guide hole 353, so that the upward exhaust gas can smoothly pass through the air guide hole 353 and the air guide groove 361 into the upper area of ​​the slide plate 35, and then enter the absorption area 272, where it comes into contact with the purified water mist and participates in the purification operation;

[0067] After the telescopic device 33 is started, the slide plate 35 slides vertically relative to the limiting rod 36. As the slide plate 35 moves upward, the air guide hole 353 on the slide plate 35 moves to the area above the air guide groove 361 on the limiting rod 36. At this time, the limiting rod 36 and the small end of the air guide hole 353 cooperate to further prevent the exhaust gas in the upper area from escaping downward from the air guide hole 353, so that the exhaust gas is concentrated and flows out from the diffusion hole 31 and the diffusion pipe 32, forming a more concentrated and stronger impact airflow, further increasing the contact degree between the exhaust gas and the filler particles, so that the filler particles inside the absorption area 272 are stirred more fully, reducing the occurrence of filler particle agglomeration, and ensuring the passability of the absorption area 272;

[0068] Subsequently, when the slide 35 begins to move downward and reset, when the slide 35 coincides with the air guide groove 361 on the limit rod 36, the exhaust gas in the accelerated lower area is replenished along the air guide groove 361 into the upper area of ​​the slide 35, so that the process of accelerating and guiding the exhaust gas through the diffuser 3 into the absorption area 272 can continue.

[0069] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An electroplating waste gas treatment system, comprising a collection pipe (1), a pretreatment module, a spray purification module and a monitoring and emission module, wherein the collection pipe (1) is used to collect waste gas generated during the electroplating process, and then undergoes dust removal and cooling treatment in the pretreatment module, and finally undergoes absorption and purification treatment in the spray purification module, and the purified waste gas is sampled and tested by the monitoring and emission module, and is discharged after being determined to meet emission standards; It is characterized by: The spray purification module comprises a spray tower (2), an air inlet (21) is provided on a side wall of the spray tower (2) near the bottom, and the air inlet (21) is communicated with the collecting pipe (1); a recovery area (22) is provided in an area below the air inlet (21) inside the spray tower (2), and the recovery area (22) is communicated with a circulating water tank (23) provided on the outside, and a dosing device (24) is provided on one side of the circulating water tank (23); An air outlet pipe (25) is provided at the top of the spray tower (2), and the air outlet pipe (25) is communicated with the spray purification module; a plurality of purification zones (26) are evenly arranged in the area between the air inlet (21) and the air outlet pipe (25) inside the spray tower (2); a packing layer (27) is provided inside the purification zone (26), and a spray pipe (261) is provided on the upper side of the packing layer (27), and the spray pipe (261) is communicated with the circulating water tank (23); The packing layer (27) comprises a double layer of sieve plates (271) arranged in an upper and lower layer, and the absorption zone (272) between the sieve plates (271) is filled with packing particles; a diffusion tube (3) is provided inside the absorption zone (272), the top of the diffusion tube (3) is closed, and diffusion holes (31) are uniformly and laterally provided on the side wall; the bottom opening of the diffusion tube (3) extends vertically downward and passes through the lower sieve plate (271) of the absorption zone (272); A diffusion tube (32) is provided at a portion of the outer surface of the side wall of the diffusion tube (3) corresponding to the diffusion hole (31); the diffusion tube (32) is communicated with the diffusion hole (31); an end of the diffusion tube (32) extends in a direction away from the diffusion tube (3); and the diffusion tube (32) is a tapered tube structure; A telescopic device (33) is provided on the upper side of the packing layer (27), and the telescopic device (33) is connected to the inner wall of the purification zone (26); the telescopic end of the telescopic device (33) is connected to a driving rod (34) provided at the middle position of the top of the diffusion tube (32), and the driving rod (34) is in sliding connection with the sieve plate (271) at the top of the packing layer (27), and the diffusion tube (3) is slidably embedded in a limiting ring (273) provided on the sieve plate (271) at the lower side of the packing layer (27); The portion of the diffusion tube (3) close to the driving rod (34) is a tapered tube structure, and the corresponding connection portion between the diffusion tube (3) and the sieve plate (271) on the lower side is a straight tube structure; the diffusion tubes (32) are concentratedly distributed on the tapered portion of the outer surface of the diffusion tube (3), and the ends of the diffusion tubes (32) are inclined upward; Cutting plates (321) are provided on the upper and lower sides of the outer surface of the diffusion tube (32), and the edge ends of the cutting plates (321) are tapered structures.

2. The electroplating waste gas treatment system according to claim 1, characterized in that: The connection portion between the spreading tube (32) and the diffusion tube (3) is made of elastic material, a vibrator is provided inside the driving rod (34), and the driving rod (34) and the telescopic end of the telescopic device (33) are elastically connected.

3. The electroplating waste gas treatment system according to claim 2, characterized in that: The bottom end of the driving rod (34) slides through the top of the diffusion tube (3) and is connected to the upper surface of a slide plate (35) provided inside the diffusion tube (3); the slide plate (35) slides and is embedded in the straight tube portion inside the diffusion tube (3), and a lower limit plate (351) is provided on the inner wall of the straight tube portion of the diffusion tube (3) near the bottom, and an upper limit plate (352) is provided near the top conical tube portion, and air guide holes (353) are evenly provided on the slide plate (35), and both the lower limit plate (351) and the upper limit plate (352) are filter plate structures.

4. The electroplating waste gas treatment system according to claim 3, characterized in that: The air guide holes (353) are all tapered hole structures, and the small ends of the air guide holes (353) are located on the upper side of the slide plate (35).

5. The electroplating waste gas treatment system according to claim 3, characterized in that: A limiting rod (36) is vertically arranged at a position inside the diffuser (3) corresponding to the air guide hole (353); the top of the limiting rod (36) is connected to the lower surface of the upper limiting plate (352); the bottom of the limiting rod (36) slides through the air guide hole (353) on the slide (35) and is connected to the upper surface of the lower limiting plate (351) on the lower side; and air guide grooves (361) are evenly arranged at a position near the bottom of the outer surface of the limiting rod (36).

6. The electroplating waste gas treatment system according to claim 1, characterized in that: An annular upper limit block (37) and a lower limit block (38) are respectively provided on the outer surface of the diffusion tube (3); the upper limit block (37) is located inside the absorption zone (272); and the lower limit block (38) is located on the lower side of the packing layer (27).

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