An industrial oil fume purification device for printing and dyeing processing and a purification method thereof

Abstract

The application discloses an industrial oil fume purification device for printing and dyeing processing and a purification method thereof, and relates to the technical field of waste gas pollutant purification, which comprises a purification tower body, and a purification separation assembly is arranged in the purification tower body; a high-voltage electrostatic field is formed through cooperation between an anode part and a cathode part; the anode part comprises an anode dust collecting pipe one and a horizontal protrusion one, the horizontal protrusion one is uniformly fixed and assembled to the inner side wall of the anode dust collecting pipe one, a wavy inner plate is fixedly assembled between the horizontal protrusion one, the horizontal protrusion one and the wavy inner plate cooperatively form a concave-convex continuous arc-shaped adsorption surface, the actual adsorption contact area of the pollutants is significantly expanded, compared with a smooth inner wall, the contact probability of the charged pollutants and the anode wall surface is greatly improved, and the adsorption efficiency is obviously enhanced; meanwhile, the lower half section of the anode dust collecting pipe one has a larger radial radius than the upper half section, the working condition that the waste gas is from bottom to top and the lower part has a higher pollutant concentration is matched, and high-concentration pollutants are preferentially concentrated and adsorbed in the lower part.

Description

Technical Field

[0001] This invention relates to the field of waste gas pollutant purification technology, specifically to an industrial oil fume purification device and purification method for dyeing and printing processing. Background Technology

[0002] The dyeing and printing process generates a large amount of high-temperature, high-humidity waste gas containing oil mist, fiber dust, and particulate matter. This waste gas has a complex composition, and direct, uncontrolled emissions can easily cause air pollution; therefore, deep purification treatment is essential. Dyeing and printing waste gas purification devices are indispensable environmental protection equipment in the dyeing and printing industry. Their core function is to remove oil mist, fiber dust, and solid particulate matter from the waste gas through high-voltage electrostatic adsorption, ensuring that the waste gas meets emission standards. Currently, most dyeing and printing waste gas purification devices adopt a wet electrostatic purification structure. The waste gas flows from bottom to top through a high-voltage electrostatic field. Under the influence of the electric field, pollutants are charged and adsorbed onto the inner wall of the anode. Then, the anode surface is washed by top spray water, completing pollutant separation and equipment self-cleaning.

[0003] Currently, although existing purification devices can achieve basic waste gas purification functions, they still have many substantial technical defects in actual use. The specific technical problems are as follows: 1. The exhaust gas flows from bottom to top, and the concentration of pollutants is high in the lower part and low in the upper part. The existing anode inner wall has a smooth structure with equal diameter. The amount of pollutants adsorbed in the lower half of the anode is much greater than that in the upper half. The lower half is very easy to accumulate fibers and oil stains and become blocked. At the same time, the electric field in the upper half is in a low load state for a long time, resulting in low electric field utilization and uneven and unstable overall purification efficiency.

[0004] 2. The spray cleaning fluid is sprayed from top to bottom. The water pressure is sufficient and the impact is strong at the top, while the water flow is weakened and the scouring force is weak at the bottom. The existing anode inner wall has a uniform structure. The lower half has serious oil and fiber accumulation, which is difficult to be effectively cleaned. Long-term operation is prone to caking, which leads to frequent equipment shutdowns for maintenance and seriously affects continuous production.

[0005] 3. The adsorbed oil and fiber impurities accumulate and increase in volume. When they are washed off, they easily form clumps. During the falling process, they can easily block the through holes of the uniformly distributed plate below, causing air intake deviation and airflow short circuit. This results in uneven airflow distribution in the electric field area, further reducing the purification effect and increasing the difficulty of cleaning.

[0006] Therefore, in view of this, the present invention proposes an industrial oil fume purification device and purification method for printing and dyeing processing to make up for and improve the deficiencies of the prior art. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention provides an industrial oil fume purification device and method for dyeing and printing processing, thereby resolving the technical issues raised in the background section.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows: an industrial oil fume purification device and purification method for dyeing and printing processing, comprising a purification tower body, wherein a purification separation component is provided inside the purification tower body; the purification separation component includes an anode component and a cathode component; the anode component and the cathode component cooperate with each other to form a high-voltage electrostatic field; the anode component includes an anode dust collection tube and a transverse protrusion, the transverse protrusion being uniformly and fixedly mounted on the inner side wall of the anode dust collection tube, and a corrugated inner plate being fixedly mounted between the transverse protrusions, the transverse protrusions and the corrugated inner plate cooperating to form a continuous concave-convex arc-shaped adsorption surface; the cathode component includes a cathode wire vertically inserted inside the anode dust collection tube; when the dyeing and printing waste gas enters the anode dust collection tube, it is charged under the action of the high-voltage electrostatic field, and the concave-convex arc-shaped structure formed by the transverse protrusions and the corrugated inner plate increases the adsorption contact area, so that the charged waste gas pollutants are concentrated and adsorbed and collected on the surface area of ​​the transverse protrusions and the corrugated inner plate.

[0009] Furthermore, the purification tower body is respectively connected to an air inlet pipe and an air outlet pipe. The air inlet pipe is used to introduce dyeing and printing waste gas, and the air outlet pipe is used to discharge the purified gas.

[0010] Furthermore, the purification tower body is equipped with a gas equalization component, which is located below the purification separation component. The gas equalization component is used to uniformly guide the dyeing and printing waste gas, so that the waste gas is uniformly transported upward to the purification separation component. The gas equalization component includes a gas distribution plate and a filter guide plate. The gas distribution plate is horizontally installed in the purification tower body, and the plate body has several guiding holes. The filter guide plate is installed above the gas distribution plate, and the filter guide plate as a whole has an inverted V-shaped inclined structure with the middle arched upward and both ends inclined downward.

[0011] Furthermore, the anode dust collection pipe is integrally formed by combining the upper half pipe body and the lower half pipe body. The radial radius of the upper half pipe body is smaller than that of the lower half pipe body. The transverse protrusion and the corrugated inner plate are both located on the inner wall of the lower half pipe body of the anode dust collection pipe, and the protrusion apex of the transverse protrusion and the inner wall of the upper half pipe body of the anode dust collection pipe are in the same vertical plane.

[0012] Furthermore, the anode component includes a second transverse protrusion, which is uniformly and fixedly mounted on the inner wall of the lower half of the anode dust collection tube. The second transverse protrusion cooperates with the corrugated inner plate to form a continuous arc-shaped adsorption surface, and the apex of the second transverse protrusion protrudes out of the inner wall of the upper half of the anode dust collection tube.

[0013] Furthermore, the cathode component includes a cathode suspension frame, which is fixedly mounted on the top of the interior of the purification tower. The upper ends of several cathode wires are fixedly mounted to the cathode suspension frame. Several barbs are fixedly mounted on the outer wall of the cathode wires. The barbs are equidistantly distributed inside the upper and lower halves of the anode dust collection tube.

[0014] Furthermore, the anode component includes an anode dust collection tube two, which is integrally formed by an upper half tube body and a lower half tube body. The radial radius of the upper half tube body is greater than that of the lower half tube body. The transverse protrusion one and the corrugated inner plate are both provided on the inner wall of the upper half tube body of the anode dust collection tube two, and the protrusion apex of the transverse protrusion one and the inner wall of the lower half tube body of the anode dust collection tube two are in the same vertical plane. The spacing between the plurality of barbs corresponding to the upper half tube body of the anode dust collection tube two is smaller than the spacing between their corresponding lower half tube bodies.

[0015] Furthermore, the purification and separation component includes an integrated frame, and the anode is fixedly assembled inside the integrated frame; the outer wall of the integrated frame is symmetrically fixedly assembled with connecting plates, and the side wall of the purification tower is fixedly assembled with limiting plates at the positions corresponding to the connecting plates. The connecting plates and the limiting plates are slidably assembled, and springs are uniformly fixedly connected to the lower surface of the limiting plates. The end of the spring away from the limiting plate is fixedly connected to the upper surface of the gas distribution plate.

[0016] Furthermore, the interior of the purification tower is equipped with a spray cleaning assembly, which is located above the purification separation assembly. The spray cleaning assembly is used to perform high-pressure spray rinsing on the purification separation assembly to remove pollutants adsorbed inside the anode. The spray cleaning assembly includes a spray water inlet connector and a spray horizontal pipe. The spray water inlet connector is located on the outside of the purification tower, and the spray horizontal pipe is arranged horizontally at the top inside the purification tower. Several spray holes are opened on the spray horizontal pipe for uniformly spraying cleaning liquid downwards.

[0017] A method for separating and purifying pollutants from waste gas used in dyeing and printing processes includes the following steps: Step S1: The high-temperature oily waste gas generated from the printing and dyeing process is sent into the purification tower through the inlet pipe. The waste gas first flows through the gas equalization component and is initially evenly distributed by the horizontally set gas distribution plate, so that the waste gas is evenly transported upward and ensures that the waste gas enters the purification and separation component stably. Step S2: The uniformly flowing exhaust gas enters the purification and separation component, and a high-voltage electrostatic field is formed between the cathode and anode components. After the exhaust gas pollutants are charged, they are adsorbed on the surface of the anode component, thus completing the separation of pollutants. Step S3: The clean gas, after being separated and purified by the high-voltage electrostatic field, continues to flow upward and is discharged through the gas outlet pipe at the top of the purification tower, completing the separation and purification process of the waste gas. Step S4: After the device has been running for a period of time, start the spray cleaning component at the top of the purification tower. The cleaning liquid is sprayed downwards to wash away the pollutants adsorbed on the surface of the anode. The impurities slide down the inner wall to the bottom of the device and are discharged, ensuring stable operation of the equipment.

[0018] Compared with the prior art, the beneficial effects of the present invention are: (1) In the purification stage, this device significantly expands the actual adsorption contact area of ​​pollutants by setting a transverse protrusion on the inner wall of the lower half of the anode dust collection tube and splicing it with the wave to form a continuous arc-shaped adsorption surface. Compared with the smooth inner wall, the probability of charged pollutants contacting the anode wall is greatly increased, and the adsorption efficiency is significantly enhanced. At the same time, the radial radius of the lower half of the anode dust collection tube is larger than that of the upper half, which matches the working condition of the exhaust gas from bottom to top and the lower part of the pollutant concentration is higher. This allows high-concentration pollutants to be preferentially adsorbed in the lower part, avoiding the waste of electric field resources in the upper part, greatly improving the electrostatic separation purification efficiency, and ensuring that pollutants such as oil mist and fiber dust in the exhaust gas are fully separated.

[0019] During the cleaning phase, this device utilizes a linked vibration structure composed of an integrated frame, connecting plate, limiting plate, and springs, in conjunction with a top spray cleaning assembly, to achieve efficient self-cleaning of contaminants on the inner wall of the anode dust collection tube. High-pressure cleaning fluid flushes the lower half of the contaminant-rich area from top to bottom, while the water flow impact causes the entire anode component to vibrate. The vibration force directly acts on the adsorption surface of the lower half of the anode dust collection tube, effectively loosening stubborn oil stains and breaking up adhered impurities, preventing impurities from caking and clogging. The broken-up impurities are dispersed and guided by an inverted V-shaped filter guide plate, avoiding clogging of the gas equalization assembly, ensuring the long-term cleanliness of the anode component's adsorption surface, maintaining stable operation of the high-voltage electric field, extending the continuous working cycle of the equipment, and reducing maintenance frequency and costs.

[0020] During the waste gas transport stage, this device, through its integrated structure combining a purification tower, a gas equalization component, and a purification separation component, can achieve stable purification treatment of high-temperature oily waste gas generated during the dyeing and printing process throughout the entire process. After the waste gas is introduced through the inlet pipe, it first undergoes initial uniform distribution through a gas distribution plate, and then undergoes coarse filtration by activated carbon material and an inverted V-shaped filter guide plate. This effectively intercepts impurities such as large fiber particles and viscous oil clumps, significantly reducing the adsorption load of the subsequent high-voltage electric field. This prevents impurities from directly entering the electric field and causing short circuits or a decrease in adsorption efficiency, creating stable operating conditions for subsequent electrostatic adsorption. This improves the basic treatment effect of waste gas purification from the source and ensures the smoothness and reliability of the overall purification process.

[0021] (2) This device sets a second transverse protrusion on the inner wall of the lower half of the anode dust collection tube, so that the apex of the second transverse protrusion protrudes out of the inner wall of the upper half of the anode dust collection tube. The second transverse protrusion and the corrugated inner plate form a continuous arc-shaped adsorption surface. Under the premise of ensuring that the distance between the anode and cathode is within a controllable range and does not cause electric field distortion, the actual adsorption area of ​​the lower half is further increased, the adsorption capacity of the high-concentration pollutant enrichment area is strengthened, and pollutants such as oil mist and fiber dust are more efficiently and stably attached to the arc-shaped adsorption surface of the lower half, avoiding local adsorption overload, ensuring stable and reliable electrostatic separation effect, adapting to the flow characteristics of the waste gas being concentrated at the bottom and light at the top, and improving the overall purification efficiency.

[0022] Meanwhile, relying on the transversely protruding double-protruding structural design, some of the high-pressure water flow during the spray cleaning stage can directly act on the pollutant-rich area in the lower half, effectively compensating for the problem of water flow scouring force attenuation from top to bottom, strengthening the cleaning power of the core adsorption area in the lower half, and cooperating with the vibration structure composed of integrated frame, connecting plate, limiting plate and spring, after the vibration force is transmitted to the lower half, it loosens stubborn oil stains and breaks up sticky impurities, preventing impurities from accumulating and hardening. The broken impurities are dispersed and guided by the inverted V-shaped filter guide plate to avoid clogging the gas distribution plate below, ensuring the cleanliness of the anode adsorption surface, extending the continuous operation cycle of the equipment and reducing the frequency of maintenance.

[0023] (3) This device sets up an anode dust collection tube II, making the radial radius of the upper half of the tube larger than that of the lower half. At the same time, the transverse protrusion I and the corrugated inner plate are set on the inner wall of the upper half of the anode dust collection tube II to form a concave-convex arc-shaped adsorption surface. This can create a larger adsorption space in the upper half, effectively improving the upper half's capacity to carry pollutants in the exhaust gas. This allows more pollutants to be charged and adsorbed in the upper half, changing the disadvantages of the traditional lower half being high-load and easy to clog. This allows the distribution of pollutants to match the spray cleaning intensity, and can stably remove pollutants such as oil mist and fiber dust from the dyeing and printing exhaust gas.

[0024] Furthermore, the arrangement of the barbs on the outer wall of the cathode wire corresponds to a smaller and denser spacing in the upper half of the anode dust collection tube, and a larger and sparser spacing in the lower half. This creates a stronger and more uniform high-voltage electrostatic field in the upper half, enhancing the charging and adsorption capacity of pollutants and guiding them to concentrate in the upper half. The electric field strength in the lower half is relatively weaker, reducing ineffective adsorption and preventing accumulation and caking due to excessive adsorption pressure. This ensures that the electric field distribution is highly compatible with the pollutant concentration and cleaning conditions, resulting in a more balanced and stable purification process. By concentrating pollutants in the upper half of the anode dust collection tube, the high-pressure cleaning fluid directly impacts the enriched area from top to bottom during the spray cleaning stage, efficiently removing the concentrated oil and fiber impurities. The lower half of the anode dust collection tube has less adsorption, and the residual flushing force of the water flow combined with spring vibration is sufficient for thorough cleaning. This fully utilizes the attenuation characteristic of water flow from top to bottom, matching the cleaning force with the pollutant distribution, significantly improving cleaning efficiency, effectively preventing impurities from accumulating and clogging in the lower half, and ensuring long-term stable operation of the equipment. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the axial view three-dimensional structure in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the frontal planar structure in Embodiment 1 of the present invention; Figure 3 This is a three-dimensional structural diagram of the anode dust collection tube in Embodiment 1 of the present invention; Figure 4 This is an exploded view of the gas equalization component in Embodiment 1 of the present invention; Figure 5 This is a schematic plan view of the internal structure of the anode dust collection tube in Embodiment 1 of the present invention; Figure 6 This is a schematic diagram of the positional relationship between the transverse protrusion and the corrugated inner plate in Embodiment 1 of the present invention. Figure 7 This is a three-dimensional schematic diagram of the internal structure of the anode dust collection tube in Embodiment 1 of the present invention; Figure 8 This is a schematic diagram of the positional relationship between the second transverse protrusion and the corrugated inner plate in Embodiment 2 of the present invention; Figure 9 This is a three-dimensional schematic diagram of the internal structure of the anode dust collection tube in Embodiment 2 of the present invention; Figure 10 This is a schematic plan view of the internal structure of the anode dust collection tube 2 in Embodiment 3 of the present invention; Figure 11 This is a schematic diagram of the planar structure of the thorns in Embodiment 3 of the present invention; Figure 12 This is a schematic diagram of the three-dimensional structure of the thorns in Embodiment 3 of the present invention.

[0026] The numbers on the map are: 1. Purification tower body; 11. Inlet pipe; 12. Outlet pipe; 2. Gas equalization assembly; 21. Gas distribution plate; 22. Filter guide plate; 3. Purification and separation components; 31. Integrated frame; 32. Anode components; 321. Anode dust collection pipe one; 322. Horizontal protrusion one; 323. Corrugated inner plate; 324. Horizontal protrusion two; 325. Anode dust collection pipe two; 33. Cathode components; 331. Cathode suspension bracket; 332. Cathode wire; 333. Barb; 34. Connecting plate; 35. Limiting plate; 36. Spring; 4. Spray cleaning assembly; 41. Spray water inlet connector; 42. Spray horizontal pipe. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. It should be noted that the gas equalization component 2 in this device is used to uniformly guide the dyeing and printing waste gas, and the spray cleaning component 4 is used to perform high-pressure spray rinsing on the residue after separation and purification. The two work together with the overall structure to complete the uniform distribution and transportation of dyeing and printing waste gas and the cleaning and discharge of pollutants on the surface of the anode 32. The working principles involved in the above-mentioned gas equalization component 2 and spray cleaning component 4, such as the airflow equalization and guiding principle of the gas equalization plate 21, the water circuit conduction principle of the spray water inlet connector 41, the spray water distribution principle of the spray horizontal pipe 42, as well as the specific assembly structure, specifications, installation method and control logic of each component, are all existing mature technologies. Among them, the gas distribution plate 21 adopts a conventional gas distribution structure with multiple sets of guiding holes on a horizontal plate, which provides a diversion benchmark for the uniform upward conveyance of exhaust gas; the spray water inlet connector 41 and the spray horizontal pipe 42 form a spray water supply structure, which can be selected from conventional high-pressure spray pipes and spray connector structures. It is a mature existing spray water supply structure in the field of wet electrostatic exhaust gas purification. The specific principles and parameter configurations of the above-mentioned existing structures will not be elaborated on later.

[0028] Example 1 Please refer to Figure 1 - Figure 3 as well as Figure 6As shown, a waste gas pollutant separation and purification device for dyeing and printing processing includes a purification tower body 1, and a purification separation component 3 is arranged inside the purification tower body 1. The purification separation component 3 includes an anode element 32 and a cathode element 33. The anode element 32 and the cathode element 33 cooperate with each other to form a high-voltage electrostatic field. The anode element 32 includes an anode dust collection tube 321 and a transverse protrusion 322. The transverse protrusions 322 are uniformly fixedly assembled on the inner sidewall of the anode dust collection tube 321, and a corrugated inner plate 323 is fixedly assembled between the transverse protrusions 322. The transverse protrusion 322 and the corrugated inner plate 323 cooperate to form a continuous arc-shaped adsorption surface; the cathode element 33 includes a cathode wire 332 that is vertically inserted inside the anode dust collection tube 321; when the dyeing and printing waste gas enters the anode dust collection tube 321, it is charged under the action of a high-voltage electrostatic field. The concave and convex arc-shaped structure formed by the transverse protrusion 322 and the corrugated inner plate 323 increases the adsorption contact area, so that the pollutants in the charged waste gas are concentrated and adsorbed and collected on the surface area of ​​the transverse protrusion 322 and the corrugated inner plate 323.

[0029] It should be noted that the purification tower body 1 is equipped with an air inlet pipe 11 and an air outlet pipe 12 respectively. The air inlet pipe 11 is used to introduce dyeing and printing waste gas, and the air outlet pipe 12 is used to discharge the purified gas.

[0030] Please refer to Figure 1 - Figure 4 As shown, the purification tower 1 is equipped with a gas equalization component 2, which is located below the purification separation component 3. The gas equalization component 2 is used to uniformly guide the dyeing and printing waste gas, so that the waste gas is uniformly transported upward to the purification separation component 3. The gas equalization component 2 includes a gas distribution plate 21 and a filter guide plate 22. The gas distribution plate 21 is horizontally installed inside the purification tower 1, and the plate has several guiding holes. The filter guide plate 22 is installed above the gas distribution plate 21, and the filter guide plate 22 has an inverted V-shaped inclined structure with the middle arched upward and both ends inclined downward.

[0031] The purification tower body 1 is equipped with a spray cleaning assembly 4, which is located above the purification separation assembly 3. The spray cleaning assembly 4 is used to perform high-pressure spray rinsing on the purification separation assembly 3 to remove pollutants adsorbed inside the anode 32. The spray cleaning assembly 4 includes a spray water inlet connector 41 and a spray horizontal pipe 42. The spray water inlet connector 41 is located on the outside of the purification tower body 1, and the spray horizontal pipe 42 is arranged horizontally at the top inside the purification tower body 1. Several spray holes are opened on the spray horizontal pipe 42 for uniformly spraying cleaning liquid downwards.

[0032] Please refer to Figure 1 - Figure 7As shown, the anode dust collection tube 321 is integrally formed by the upper half tube body and the lower half tube body. The radial radius of the upper half tube body is smaller than that of the lower half tube body. The transverse protrusion 322 and the corrugated inner plate 323 are both located on the inner wall of the lower half tube body of the anode dust collection tube 321. The protrusion apex of the transverse protrusion 322 and the inner wall of the upper half tube body of the anode dust collection tube 321 are in the same vertical plane. The cathode component 33 includes a cathode suspension frame 331, which is fixedly assembled at the top of the interior of the purification tower body 1. The upper ends of several cathode wires 332 are fixedly assembled with the cathode suspension frame 331. Several barbs 333 are fixedly assembled on the outer wall of the cathode wires 332. Several barbs 333 are equidistantly distributed inside the upper and lower halves of the anode dust collection tube 321.

[0033] It should be noted that the purification and separation component 3 includes an integrated frame 31, and the anode component 32 is fixedly assembled inside the integrated frame 31; the outer wall of the integrated frame 31 is symmetrically fixedly assembled with connecting plates 34, and the side wall of the purification tower body 1 is fixedly assembled with limiting plates 35 at the positions corresponding to the connecting plates 34. The connecting plates 34 and the limiting plates 35 are slidably assembled, and the lower surface of the limiting plates 35 is uniformly fixedly connected with springs 36, and the end of the springs 36 away from the limiting plates 35 is fixedly connected to the upper surface of the gas distribution plate 21.

[0034] Specifically, the high-temperature oily waste gas generated from the printing and dyeing process is first transported into the purification tower 1 through the air inlet pipe 11. The air inlet pipe 11 is a dedicated flow channel for the waste gas to enter the purification tower 1, ensuring that the waste gas is stably and centrally introduced into the purification area inside the tower.

[0035] After entering the purification tower 1, the exhaust gas first flows through the gas equalization component 2 area. The exhaust gas first passes through the gas equalization plate 21, which is horizontally arranged and has several guide holes. The gas equalization plate 21 performs initial uniform distribution of the concentrated exhaust gas to avoid excessive local airflow velocity and ensure that the overall flow velocity of the upward-flowing exhaust gas tends to be uniform. Subsequently, the exhaust gas continues to flow upward and passes through the filter guide plate 22, which is mounted above the gas equalization plate 21 and has an inverted V-shaped structure that is arched upward in the middle and inclined downward at both ends. The filter guide plate 22 is made of activated carbon material. Compared with conventional flat filter screens, this inverted V-shaped structure can expand the range of action of the exhaust gas in a limited vertical space, so that the evenly distributed exhaust gas can contact the filter screen surface of the filter guide plate 22 from multiple directions, thereby increasing the effective contact area between the exhaust gas and the filter guide plate 22.

[0036] This ensures that the filter guide plate 22 can pre-filter and intercept large particulate fiber flocs, viscous oil clumps and some odor impurities in the dyeing and printing waste gas, thereby reducing the amount of pollutants entering the high-voltage electric field and reducing the adsorption load of the anode and cathode.

[0037] The exhaust gas continues to flow upwards through the filter guide plate 22 to the purification and separation component 3 area. The evenly distributed exhaust gas enters the anode dust collection tube 321. Under the fixing action of the cathode suspension bracket 331, the cathode wire 332 always remains vertical and is correspondingly arranged at the central axis position of the anode dust collection tube 321. The barbs 333 evenly distributed on the outer wall of the cathode wire 332 form a stable and uniform high-voltage electrostatic field between the anode component 32 and the cathode component 33 under the action of high-voltage power supply. After the exhaust gas enters this high-voltage electrostatic field, the oil mist, fiber dust, and particulate pollutants contained inside are electrostatically reacted. Under the influence of the electric field, the pollutants are rapidly charged. The charged pollutants are then directed by the electric field force and continuously move towards the inner wall of the anode dust collection tube 321. During this process, the lower half of the inner wall of the anode dust collection tube 321 is connected to the transverse protrusion 322 and the corrugated inner plate 323 to form a continuous arc-shaped adsorption surface. Compared with a conventional smooth inner wall, this arc-shaped adsorption surface greatly expands the actual adsorption contact area in a limited space. Therefore, the probability of contact between the charged pollutants and the lower half of the inner wall of the anode dust collection tube 321 is significantly increased, and the adsorption efficiency is greatly enhanced.

[0038] Meanwhile, the radial radius of the lower half of the anode dust collection tube 321 is larger than that of the upper half, which perfectly matches the working condition of the exhaust gas flowing from bottom to top and the lower half having a higher concentration of pollutants. This allows for the attachment of more pollutants, avoids local accumulation and overload, and ensures that charged pollutants are efficiently, stably, and centrally adsorbed on the concave-convex arc-shaped adsorption surface area of ​​the lower half of the anode dust collection tube 321, thereby achieving effective separation of pollutants and exhaust gas.

[0039] After the pollutants are separated, the clean gas continues to flow upward and is eventually discharged from the purification tower 1 through the gas outlet pipe 12. The gas outlet pipe 12 provides a regular discharge channel for the purified gas, ensuring that the clean waste gas is discharged in an orderly manner and completing the main process of waste gas purification.

[0040] After the device has been running for a period of time, the spray cleaning component 4 is activated. The cleaning fluid is introduced into the horizontal spray pipe 42, which is arranged horizontally at the top of the tower body, through the spray water inlet connector 41. The horizontal spray pipe 42 sprays the high-pressure cleaning fluid downwards evenly through the top spray holes. The high-pressure cleaning fluid washes away the oil and fiber impurities adsorbed on the inner wall of the anode dust collection pipe 321 from top to bottom. Due to the impact of the high-pressure water flow on the integrated frame 31, the integrated frame 31 will be moved downwards. Specifically, the connecting plate 34, which is symmetrically mounted on the outer wall of the integrated frame 31, slides vertically downwards along the limiting plate 35 on the side wall of the purification tower body 1, compressing the spring 36 between the connecting plate 34 and the gas distribution plate 21. Since the spring 36 is arranged in the lower area of ​​the lower half of the anode dust collection pipe 321, the vibration force can be directly and efficiently transmitted to the anode dust collection pipe 321. Under the continuous impact of the high-pressure cleaning fluid and the reciprocating action of the elastic reset of the spring 36, the lower half of the tube body 21 drives the anode component 32 to generate continuous micro-vibration. This vibration not only helps to loosen and remove oil and fiber impurities from the inner wall of the lower half of the anode dust collection tube 321, but also, under the synergistic effect of vibration and flushing fluid, disperses and separates pollutants that have been adsorbed and accumulated for a long time and are stuck together, preventing the concentrated adsorbed impurities from clumping together and avoiding large clumps of impurities from directly falling off and blocking the gas distribution plate 21 below. Even if a small amount of clumps of impurities still fall off with the water flow, they can slide and disperse to the two side edge areas by the inverted V-shaped inclined structure of the filter guide plate 22 and are eventually carried away by the cleaning fluid. The impurities that are washed off and shaken off slide down with the cleaning fluid and are guided by the filter guide plate 22 to the bottom of the tower for discharge.

[0041] Example 2 Based on Example 1, please refer to Figure 2 , Figure 8 as well as Figure 9 As shown, the anode component 32 includes a second transverse protrusion 324, which is uniformly fixedly assembled on the inner wall of the lower half of the anode dust collection tube 321. The second transverse protrusion 324 and the corrugated inner plate 323 cooperate to form a continuous arc-shaped adsorption surface, and the protrusion apex of the second transverse protrusion 324 protrudes out of the inner wall of the upper half of the anode dust collection tube 321.

[0042] Specifically, in the workflow of Example 2: the waste gas intake, uniform coarse filtration, electrostatic adsorption basic principle, and clean gas discharge stages are all consistent with Example 1: the dyeing waste gas enters the purification tower 1 through the intake pipe 11, is uniformly guided by the gas equalization component 2, and is coarsely filtered by the activated carbon filter guide plate 22 before being transported to the purification separation component 3; the waste gas pollutants are charged in the high-voltage electrostatic field formed by the anode component 32 and the cathode component 33, and are concentrated and adsorbed on the lower half of the adsorption surface of the anode dust collection pipe 321, and the clean gas is finally discharged through the outlet pipe 12.

[0043] The difference lies in: such as Figure 8As shown, the lower half of the anode dust collection pipe 321 adopts a transverse protrusion 324, the apex of which protrudes beyond the inner wall of the upper half of the anode dust collection pipe 321. The transverse protrusion 324 and the corrugated inner plate 323 still form a concave-convex arc-shaped adsorption surface to achieve concentrated adsorption of pollutants in the lower half. During the spray cleaning stage, this differentiated structure further optimizes the cleaning performance: the high-pressure cleaning fluid sprayed from top to bottom can directly act on the surface of the protruding transverse protrusion 324, flushing the main pollutant-rich area in the lower half and compensating for the loss of flushing force during the downward flow of water. Combined with the impact of water flow and the vibration driven by the spring 36, the impurities that are stuck together are broken up and then dispersed and guided by the inverted V-shaped filter guide plate 22, which enhances the sewage discharge effect in the lower half and more effectively prevents the accumulation and caking of impurities in the lower half, avoiding the clogging problem of the gas distribution plate 21.

[0044] Example 3 Based on Example 1, please refer to Figure 2 ,as well as Figure 10 - Figure 12 As shown, the anode component 32 includes an anode dust collection tube 325, which is integrally formed by an upper section tube and a lower section tube. The radial radius of the upper section tube is greater than that of the lower section tube. The transverse protrusion 322 and the corrugated inner plate 323 are both provided on the inner wall of the upper section tube of the anode dust collection tube 325, and the protrusion apex of the transverse protrusion 322 and the inner wall of the lower section tube of the anode dust collection tube 325 are in the same vertical plane.

[0045] It should be noted that the spacing between the upper half of the anode dust collection tube 325 corresponding to the barbs 333 is smaller than the spacing between the lower half of the anode dust collection tube 325 corresponding to them.

[0046] Specifically, in the workflow of Example 3, the overall operation process of waste gas intake, uniform coarse filtration, clean gas discharge, and spray vibration is consistent with that of Example 1: the high-temperature oily waste gas generated by the dyeing and printing process enters the purification tower 1 through the intake pipe 11, and after uniform flow and coarse filtration by activated carbon through the gas equalization component 2, it is transported to the purification separation component 3; after the pollutants are separated by electrostatic adsorption, the clean gas is discharged in an orderly manner through the outlet pipe 12; the spraying stage relies on the impact of high-pressure water flow, the reciprocating vibration of spring 36, and the dispersion and guidance of filter guide plate 22 to complete the cleaning of impurities.

[0047] The difference lies in the following: Anode dust collection tube 2 325 is used, with the radial radius of its upper section being larger than that of its lower section. A transverse protrusion 322 and a corrugated inner plate 323 are positioned on the inner wall of the upper section of anode dust collection tube 2 325, with the protrusion apex flush with the inner wall of the lower section. Simultaneously, the barbs 333 on the outer wall of the cathode wire 332 are spaced more evenly and densely in the upper section of anode dust collection tube 2 325, while they are spaced more evenly and sparsely in the lower section. The larger radial dimension and denser arrangement of the barbs 333 in the upper section of anode dust collection tube 2 325 result in a higher electric field strength. Combined with the concave-convex arc-shaped adsorption surface, this guides the concentrated adsorption of pollutants in the upper section of anode dust collection tube 2 325. The lower section of anode dust collection tube 2 325 has a weaker electric field strength and less adsorption capacity, thus matching the characteristics of spray cleaning from top to bottom, with strong upper scouring force and weakening lower scouring force.

[0048] During the spray cleaning stage, this differentiated structure achieves a match between the rinsing force and the distribution of contaminants: the high-pressure cleaning fluid is sprayed from top to bottom, which can directly act on the contaminant-rich area of ​​the upper half of the anode dust collection tube 325 with the maximum rinsing force, effectively removing the concentrated oil and fiber impurities; while the lower half of the anode dust collection tube 325 has a small amount of contaminants adsorbed, and combined with the residual rinsing force of the water flow downward and the overall vibration driven by the spring 36, the cleaning of the lower half can be fully completed. The impurities are dispersed and guided by the water flow through the inverted V-shaped filter guide plate 22 and then discharged. This fully utilizes the characteristics of the spray water flow and compensates for the insufficient rinsing force in the lower part through vibration, resulting in higher overall cleaning efficiency and effectively preventing the accumulation and caking of impurities in the lower half.

[0049] Example 4 A method for separating and purifying pollutants from waste gas used in dyeing and printing processes includes the following steps: Step S1: The high-temperature oily waste gas generated by the printing and dyeing process is sent into the purification tower 1 through the air inlet pipe 11. The waste gas first flows through the gas equalization component 2 and is initially evenly distributed by the horizontally set gas distribution plate 21, so that the waste gas is evenly transported upward and the waste gas is stably entered into the purification and separation component 3. Step S2: The uniformly flowing exhaust gas enters the purification and separation component 3. A high-voltage electrostatic field is formed between the cathode component 33 and the anode component 32. After the exhaust gas pollutants are charged, they are adsorbed on the surface of the anode component 32, thus completing the separation of pollutants. Step S3: The clean gas separated and purified by the high-voltage electrostatic field continues to flow upward and is discharged through the gas outlet pipe 12 at the top of the purification tower 1, completing the separation and purification process of the waste gas. Step S4: After the device has been running for a period of time, start the spray cleaning component 4 at the top of the purification tower 1. The cleaning liquid is sprayed downward to wash away the pollutants adsorbed on the surface of the anode 32. The impurities slide down the inner wall to the bottom of the device and are discharged, ensuring the stable operation of the equipment.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An industrial oil fume purification device for printing and dyeing processing, comprising a purification tower body (1), characterized in that: The purification tower body (1) is equipped with a purification separation component (3); The purification and separation component (3) includes an anode (32) and a cathode (33); the anode (32) and the cathode (33) cooperate with each other to form a high-voltage electrostatic field; The anode component (32) includes an anode dust collection tube (321) and a transverse protrusion (322). The transverse protrusion (322) is uniformly fixedly mounted on the inner wall of the anode dust collection tube (321) along the axial direction. A corrugated inner plate (323) is fixedly mounted between the transverse protrusions (322). The transverse protrusions (322) and the corrugated inner plate (323) cooperate to form a continuous arc-shaped adsorption surface. The cathode component (33) includes a cathode wire (332) that is vertically inserted inside the anode dust collection tube (321). When the dyeing and printing waste gas enters the anode dust collection tube (321), it is charged under the action of high voltage electrostatic field. The concave-convex arc structure formed by the transverse protrusion (322) and the corrugated inner plate (323) increases the adsorption contact area, so that the pollutants in the charged waste gas are concentrated and adsorbed and collected on the surface area of ​​the transverse protrusion (322) and the corrugated inner plate (323).

2. The industrial oil fume purification equipment for printing and dyeing processing according to claim 1, characterized in that: The purification tower body (1) is respectively connected to an air inlet pipe (11) and an air outlet pipe (12). The air inlet pipe (11) is used to introduce dyeing and printing waste gas, and the air outlet pipe (12) is used to discharge the purified gas.

3. The industrial oil fume purification equipment for printing and dyeing processing according to claim 2, characterized in that: The purification tower body (1) is equipped with a gas equalization component (2), which is located below the purification separation component (3). The gas equalization component (2) is used to uniformly guide the dyeing and printing waste gas, so that the waste gas is uniformly transported upward to the purification separation component (3). The gas equalization component (2) includes a gas equalization plate (21) and a filter guide plate (22). The gas equalization plate (21) is horizontally installed inside the purification tower body (1). The plate body has several flow guide holes. The filter guide plate (22) is installed above the gas equalization plate (21). The filter guide plate (22) has an inverted V-shaped inclined structure with the middle arched upward and both ends inclined downward.

4. The industrial oil fume purification equipment for printing and dyeing processing according to claim 1, characterized in that: The anode dust collection tube (321) is integrally formed by the upper half tube and the lower half tube. The radial radius of the upper half tube is smaller than that of the lower half tube. The transverse protrusion (322) and the corrugated inner plate (323) are both located on the inner wall of the lower half tube of the anode dust collection tube (321). The protrusion apex of the transverse protrusion (322) and the inner wall of the upper half tube of the anode dust collection tube (321) are in the same vertical plane.

5. The industrial oil fume purification equipment for printing and dyeing processing according to claim 4, characterized in that: The anode component (32) includes a second transverse protrusion (324), which is uniformly fixedly assembled on the inner wall of the lower half of the anode dust collection tube (321). The second transverse protrusion (324) and the corrugated inner plate (323) cooperate to form a continuous arc-shaped adsorption surface, and the protrusion apex of the second transverse protrusion (324) protrudes out of the inner wall of the upper half of the anode dust collection tube (321).

6. The industrial oil fume purification equipment for printing and dyeing processing according to claim 4, characterized in that: The cathode component (33) includes a cathode suspension frame (331), which is fixedly mounted on the top of the interior of the purification tower body (1). The upper ends of several cathode wires (332) are fixedly mounted to the cathode suspension frame (331). Several barbs (333) are fixedly mounted on the outer wall of the cathode wires (332). Several barbs (333) are equidistantly distributed in the upper and lower halves of the anode dust collection tube (321).

7. The industrial oil fume purification equipment for printing and dyeing processing according to claim 6, characterized in that: The anode component (32) includes an anode dust collection tube two (325), which is integrally formed by the upper half tube body and the lower half tube body. The radial radius of the upper half tube body is greater than that of the lower half tube body. The transverse protrusion one (322) and the corrugated inner plate (323) are both provided on the inner wall of the upper half tube body of the anode dust collection tube two (325), and the protrusion apex of the transverse protrusion one (322) and the inner wall of the lower half tube body of the anode dust collection tube two (325) are in the same vertical plane. The spacing between the upper half of the anode dust collection tube (325) corresponding to the barbs (333) is smaller than the spacing between the lower half of the anode dust collection tube (325) corresponding to them.

8. The industrial oil fume purification equipment for printing and dyeing processing according to claim 1, characterized in that: The purification and separation component (3) includes an integrated frame (31), and the anode component (32) is fixedly assembled inside the integrated frame (31); The outer wall of the integrated frame (31) is symmetrically fixedly equipped with connecting plates (34). The side wall of the purification tower (1) is fixedly equipped with limiting plates (35) at the positions corresponding to the connecting plates (34). The connecting plates (34) and the limiting plates (35) are slidably assembled. The lower surface of the limiting plates (35) is uniformly fixedly connected with springs (36). The end of the springs (36) away from the limiting plates (35) is fixedly connected to the upper surface of the gas distribution plate (21).

9. An industrial oil fume purification device for printing and dyeing processing according to any one of claims 1-3, characterized in that: The purification tower body (1) is equipped with a spray cleaning assembly (4), which is located above the purification separation assembly (3). The spray cleaning assembly (4) is used to perform high-pressure spray rinsing on the purification separation assembly (3) to remove pollutants adsorbed inside the anode part (32). The spray cleaning assembly (4) includes a spray water inlet connector (41) and a spray horizontal pipe (42). The spray water inlet connector (41) is located on the outside of the purification tower body (1). The spray horizontal pipe (42) is arranged horizontally at the top inside the purification tower body (1). Several spray holes are opened on the spray horizontal pipe (42) for uniformly spraying cleaning liquid downwards.

10. A method for purifying industrial oil fumes used in dyeing and printing processes, employing the aforementioned industrial oil fume purification equipment for dyeing and printing processes, characterized in that: Includes the following steps: Step S1: The high-temperature oily waste gas generated by the printing and dyeing process is sent into the purification tower (1) through the inlet pipe (11). The waste gas first flows through the gas equalization component (2) and is initially evenly divided by the horizontally set gas distribution plate (21) so that the waste gas is evenly transported upward and ensures that the waste gas enters the purification separation component (3) stably. Step S2: The uniformly flowing exhaust gas enters the purification and separation component (3), and a high-voltage electrostatic field is formed between the cathode (33) and the anode (32). After the exhaust gas pollutants are charged, they are adsorbed on the surface of the anode (32), thus completing the separation of pollutants. Step S3: The clean gas separated and purified by the high-voltage electrostatic field continues to flow upward and is discharged through the gas outlet pipe (12) at the top of the purification tower (1), thus completing the separation and purification process of the waste gas. Step S4: After the device has been running for a period of time, start the spray cleaning component (4) at the top of the purification tower (1). The cleaning liquid is sprayed downwards to wash away the pollutants adsorbed on the surface of the anode (32). The impurities slide down the inner wall to the bottom of the device and are discharged, ensuring the stable operation of the equipment.

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