Multilayer purification device for petrochemical waste gas

Abstract

The present application relates to the technical fields of waste gas purification, and particularly relates to a multi-layered petroleum chemical waste gas purification device, comprising a purification tank, one side of which is provided with a treatment tank, the purification tank and the treatment tank are communicated through a groove, a plurality of groups of filter frames are vertically arranged in the purification tank, a filter plate is movably arranged in each group of filter frames, the filter plate can reciprocally move through the groove into the treatment tank along the horizontal direction, a turnover plate is hinged to both sides of the filter plate along the moving direction of the filter plate through a connecting shaft, an elastic reset member is arranged between the turnover plate and the filter plate, and the elastic reset member is used to drive the turnover plate to deflect away from the filter plate. The plurality of groups of filter plates can be used to grade intercept and filter the petroleum chemical waste gas, the multi-layered purification of the waste gas is realized, and the filter plate which can be moved out of the purification tank can be moved into the treatment tank for back flushing cleaning, and the filter plate does not need to be replaced in situ or the device does not need to be stopped.

Description

Technical Field

[0001] This invention relates to the field of chemical waste gas purification technology, and in particular to a multi-layer purification treatment device for petrochemical waste gas. Background Technology

[0002] Petrochemical production processes generate large quantities of waste gas containing various pollutants such as volatile organic compounds (VOCs), sulfides, nitrogen oxides, and particulate matter. Direct emission without effective treatment will cause serious harm to the atmospheric environment and human health. Currently, the purification and treatment of petrochemical waste gas typically employs a combination of technologies, including adsorption, absorption, and photocatalytic oxidation.

[0003] In the adsorption and filtration process, existing waste gas purification devices typically use multi-layer filter plates (such as activated carbon layers, molecular sieve layers, etc.) to intercept and adsorb waste gas step by step. However, during long-term operation, pollutants gradually accumulate on the surface of the filter plates, leading to increased filtration resistance and decreased purification efficiency. Therefore, it is necessary to clean or replace the filter plates regularly.

[0004] In existing technologies, filter plates are cleaned manually by removing them from the equipment after shutdown for cleaning or replacement. This method not only requires production to be interrupted, but also carries significant safety risks due to the fact that petrochemical waste gases often contain toxic and harmful components. Summary of the Invention

[0005] To address the shortcomings of the aforementioned technologies, this invention provides a multi-layer purification and treatment device for petrochemical waste gas, which can treat waste gas and automatically clean the filter plates to improve performance.

[0006] This invention discloses a multi-layer purification and treatment device for petrochemical waste gas, including a purification box and a treatment box attached to one side of the purification box. Several vertical slots are spaced apart on the side wall between the purification box and the treatment box, connecting the treatment box and the purification box. Multiple sets of filter frames are spaced apart vertically inside the purification box, and filter plates are movably embedded inside the filter frames. The filter plates can reciprocate horizontally through the slots into the treatment box. Flip plates are hinged to both ends of the filter plates along their moving direction via connecting shafts. An elastic reset member is provided between the flip plates and the filter plates, and the elastic reset member is used to drive the flip plates to deflect away from the filter plates. When the filter plate is in the purification position inside the purification chamber, the outer edge of the flip plate abuts against the groove wall under the action of the elastic reset member, sealing the groove; when the filter plate moves towards the processing chamber and passes through the groove, the flip plate overcomes the elastic force of the elastic reset member and deflects inward under the pressure of the groove wall, allowing the filter plate to pass through the groove; when the filter plate is completely removed from the groove, the flip plate automatically resets under the action of the elastic reset member, resealing the groove. The treatment box is equipped with a cleaning component for backwashing and cleaning the filter plates that are moved into the treatment box; a purification ball tank is fixedly installed on the front side of the purification box, and a purification component is installed inside the purification ball tank for purifying the waste gas entering the purification ball tank.

[0007] The outer edge of the flip plate is provided with a magnetic attraction component corresponding to the groove wall of the slot. When the flip plate abuts against the groove wall of the slot, the magnetic attraction components attract each other and press the flip plate tightly against the groove wall of the slot.

[0008] The magnetic attraction assembly includes a first strip-shaped magnetic strip fixedly embedded on the outer edge of the flip plate and a second strip-shaped magnetic strip fixedly embedded in the slotted wall. The first magnetic strip and the second magnetic strip are positioned opposite each other and attract each other when the flip plate abuts against the slotted wall.

[0009] A guide ramp is provided at the entrance of the slot. The guide ramp is used to guide the flip plate to deflect smoothly inward when the filter plate moves toward the processing box.

[0010] The purification box and the treatment box have corresponding horizontally extending moving grooves on their tops. A horizontal screw is rotatably installed in the moving groove. One end of the horizontal screw passes through the interior of the treatment box and is connected to a first drive motor. The other end of the horizontal screw is rotatably connected to the inner wall of the purification box. A drive block is sleeved on the outside of the horizontal screw. The bottom of the drive block is fixedly connected to the filter plate. When the horizontal screw rotates, it drives the filter plate to move back and forth along the moving groove. The bottom of the purification box and the treatment box are respectively provided with guide grooves, and guide blocks are slidably arranged in the guide grooves. The guide blocks are fixedly connected to the filter plate.

[0011] The cleaning assembly includes multiple mounting plates that are equidistantly arranged in a vertical direction and are fixedly installed inside the processing box. The installation height of each mounting plate corresponds one-to-one with the installation height of each filter plate. The front side of the mounting plate has three vertically extending strip grooves. A vertical screw rod is rotatably installed in the middle strip groove, and the driving end of the vertical screw rod is connected to a second drive motor. Telescopic tubes are fixedly installed in the strip grooves on both sides. The front side of the mounting plate is provided with a backflush air pipe and a cleaning pipe. The cleaning pipe is located below the backflush air pipe, and multiple nozzles are spaced apart on the front side of the cleaning pipe. A fixing block is fixedly provided on the rear side of the backflush air pipe and the cleaning pipe. The fixing block is sleeved on the outside of the vertical screw and threadedly connected to it. One end of the backwash pipe and the cleaning pipe are respectively connected to the corresponding telescopic pipe through connecting pipes; when the second drive motor drives the vertical screw to rotate, the fixed block drives the backwash pipe and the cleaning pipe to reciprocate up and down along the axial direction of the vertical screw, and performs scanning backwash cleaning on the surface of the filter plate.

[0012] The bottom of the treatment box is detachably equipped with a pull-out box, which is located below the cleaning assembly and is used to collect contaminants that are detached during backflushing. The bottom of the treatment box is hollowed out, and the air / liquid inlet ends of the backflushing air pipe and the cleaning pipe respectively extend to the outside of the treatment box and are fixedly installed with connecting flanges.

[0013] The purification component includes a first annular ultraviolet lamp rotatably disposed inside the purification spherical vessel. Multiple blades are arranged in a ring array on the inner side of the first annular ultraviolet lamp, and the surface of the blades is coated with a photocatalyst coating. The inner wall of the purification spherical vessel is provided with a reflective layer. Inside the first ring ultraviolet lamp, the second and third ring ultraviolet lamps are arranged in a cross shape. The radiation intensity of each ring ultraviolet lamp increases or decreases from the outside to the inside.

[0014] This invention provides a multi-layer purification and treatment device for petrochemical waste gas. A treatment box is located on one side of the purification box, and a slot is provided between the purification box and the treatment box for a filter plate to pass through, allowing the filter plate to move back and forth between the purification and cleaning positions. When the filter plate needs cleaning, it can be moved into the treatment box for backflushing cleaning without stopping the machine. Flip plates are hinged to both sides of the filter plate, and an elastic reset component is provided between the flip plates and the filter plate, allowing the flip plates to seal against the slot wall when the filter plate is in the purification position. When the filter plate needs to be removed, the flip plates automatically deflect inward under the pressure of the slot wall, allowing the filter plate to pass smoothly; after the filter plate is completely removed, the flip plates automatically reset under the action of the elastic reset component, resealing the slot. This dynamic sealing mechanism ensures that the channel between the purification box and the treatment box remains sealed throughout the entire movement process, preventing unpurified waste gas from leaking from the slot and blocking the backflow of pollutants detached from the treatment box back into the purification box. Each group of filter plates is driven by an independent drive mechanism, and the layers do not interfere with each other. When a filter layer needs cleaning, only the corresponding drive mechanism needs to be activated to move that layer into the processing chamber, while the remaining filter layers continue to operate normally. This "clean one by one, others continue working" mode ensures the continuity of purification and extends the service life of each filter layer. The backflushing and cleaning pipes backflush the filter layers in the processing chamber. During cleaning, any detached contaminants fall into a pull-out box at the bottom of the processing chamber, which is periodically removed and cleaned by the operator. Because the filter layers are completely removed from the purification chamber, the contaminants detached during backflushing will not cause secondary pollution to other filter layers or the purified gas within the chamber. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 A three-dimensional structural cross-sectional view of the present invention; Figure 3 This is a three-dimensional sectional view of the internal structure of the processing box of the present invention; Figure 4 This is a three-dimensional sectional view of the internal structure of the purification spherical reactor of the present invention; Figure 5 This is a horizontal cross-sectional view of the present invention; Figure 6 This is a vertical cross-sectional view of the present invention; Figure 7 for Figure 2 A magnified view of a portion of point A in the middle. Detailed Implementation

[0016] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0017] Example 1:

[0018] like Figures 1-7 As shown, this invention discloses a multi-layer purification and treatment device for petrochemical waste gas, including a purification box 1 and a treatment box 2 fixedly installed on one side of the purification box 1. The purification box 1 and the treatment box 2 are connected by a slot 11. The slot 11 is formed at the connection between the adjacent inner walls of the purification box 1 and the treatment box 2, and its opening size matches the cross-sectional profile of the filter plate 4 so that the filter plate 4 can pass through horizontally.

[0019] Multiple sets of filter frames 3 are arranged vertically at intervals inside the purification chamber 1, and filter plates 4 are movably embedded inside each set of filter frames 3. In this embodiment, there are five sets of filter plates 4, equidistantly arranged vertically along the purification chamber 1. The five sets of filter plates 4 are independently driven by corresponding drive mechanisms and can move reciprocally horizontally through the slots 11 into the treatment chamber 2. The interior of the filter plates 4 is filled with adsorbent material, which can be one or more combinations of activated carbon, molecular sieves, silica gel, alumina, quartz sand, or ceramic fibers, used to intercept and adsorb particulate matter and gaseous pollutants in petrochemical waste gas.

[0020] like Figure 2 or Figure 7 As shown, a flip plate 13 is hinged to each end of the filter plate 4 via a connecting shaft 12 in the direction of movement. An elastic reset member 14 is provided between the flip plate 13 and the filter plate 4, which drives the flip plate 13 to deflect away from the filter plate 4. In this embodiment, the elastic reset member 14 is a torsion spring, sleeved on the outside of the connecting shaft 12, with one end fixedly connected to the filter plate 4 and the other end fixedly connected to the flip plate 13. Under normal conditions, the torsion spring is in its natural state, keeping the flip plate 13 in an outwardly extended posture. The lateral dimension of the flip plate 13 is larger than that of the filter plate 4. Specifically, the length of the flip plate 13 in the direction perpendicular to the movement of the filter plate 4 is greater than the length of the filter plate 4 in that direction, allowing the outer edge of the flip plate 13 to extend beyond the edge of the filter plate 4, forming an overlapping seal with the groove wall of the slot 11.

[0021] like Figure 4 As shown, when the filter plate 4 is in the purification position inside the purification chamber 1, the outer edge of the flip plate 13 unfolds outward under the elastic force of the torsion spring of the elastic reset member 14, and tightly abuts against the groove wall of the slot 11, thereby sealing the slot 11. At this time, the exhaust gas in the purification chamber 1 cannot enter the treatment chamber 2 through the slot 11, and the gas in the treatment chamber 2 cannot flow back to the purification chamber 1.

[0022] like Figure 7 As shown, when the filter plate 4 needs to be cleaned, the drive mechanism drives the filter plate 4 to move horizontally towards the processing box 2. When the filter plate 4 moves, the flip plate 13 first contacts the inlet edge of the slot 11. As the filter plate 4 continues to move forward, the flip plate 13, under the pressure of the slot wall 11, overcomes the elastic force of the torsion spring of the elastic reset member 14 and deflects inward towards the filter plate 4, causing the outer edge of the flip plate 13 to detach from the slot wall 11, creating a passage. At this point, the filter plate 4 can smoothly pass through the slot 11 and enter the processing box 2.

[0023] like Figure 5 As shown, when the filter plate 4 is completely removed from the slot 11, the flip plate 13 loses the pressure from the slot wall of the slot 11 and automatically deflects outward and resets under the elastic force of the torsion spring of the elastic reset member 14. Its outer edge abuts against the slot wall of the slot 11 again, resealing the slot 11. At this time, even if the filter plate 4 has completely entered the treatment box 2, the slot 11 is still in a sealed state, and the exhaust gas in the purification box 1 cannot leak into the treatment box 2 through the slot 11.

[0024] After the filter plate 4 has completed backflushing cleaning in the treatment chamber 2, the drive mechanism reverses the flow, causing the filter plate 4 to pass through the slot 11 from the treatment chamber 2 back to the purification chamber 1. During the return process, the tilting plate 13 is again pressed inward by the wall of the slot 11, allowing the filter plate 4 to pass smoothly. Once the filter plate 4 has completely returned to its purification position in the purification chamber 1, the tilting plate 13 automatically resets, closing the slot 11.

[0025] Through the above structure and working principle, the present invention achieves automatic dynamic sealing of the slot 11 of the filter plate 4 throughout the entire movement process, without manual intervention, effectively preventing the leakage of unpurified waste gas and the backflow of pollutants. In this embodiment, the elastic reset element 14 is a torsion spring; in other embodiments, a coil spring, a spring sheet, or other elements with elastic reset function can also be used.

[0026] like Figure 4 As shown, a purification spherical vessel 17 is fixedly installed on the front side of the purification chamber 1. The purification spherical vessel 17 has a spherical shell structure, and a purification component 18 is installed inside it to purify the waste gas entering the purification spherical vessel 17. In this embodiment, the purification component 18 performs photocatalytic purification of the waste gas.

[0027] The purification assembly 18 includes a first annular ultraviolet lamp 20 rotatably disposed inside the purification spherical vessel 17. The first annular ultraviolet lamp 20 has an annular tube structure and can rotate around the central axis of the purification spherical vessel 17. Multiple blades 182 are arranged in a circular array on the inner side of the first annular ultraviolet lamp 20, and the surface of the blades 182 is coated with a photocatalyst coating. In this embodiment, the photocatalyst coating is a nano-titanium dioxide coating. Nano-titanium dioxide can generate electron-hole pairs under ultraviolet light irradiation, thereby generating highly oxidizing active species that can oxidize and decompose organic pollutants in the waste gas into carbon dioxide.

[0028] The inner wall of the purification spherical vessel 17 is provided with a reflective layer 19. The reflective layer 19 is made of a material with high reflectivity to ultraviolet rays, such as polished aluminum foil, stainless steel mirror panel, or aluminized polyester film. The reflective layer 19 is used to reflect ultraviolet rays that are irradiated onto the inner wall of the spherical vessel back into the vessel, thereby improving the utilization rate of ultraviolet rays and reducing irradiation dead zones.

[0029] Inside the first ring-shaped ultraviolet lamp 20, the second ring-shaped ultraviolet lamp 21 and the third ring-shaped ultraviolet lamp 22 are arranged in a cross shape. Specifically, the first ring-shaped ultraviolet lamp 20, the second ring-shaped ultraviolet lamp 21 and the third ring-shaped ultraviolet lamp 22 are arranged from the outside to the inside according to the intensity of illumination. The first ring-shaped ultraviolet lamp 20 is rotatably hinged to the inner wall of the purification spherical vessel 17. The second ring-shaped ultraviolet lamp 21 is fixedly connected to the edge of the first ring-shaped ultraviolet lamp 20. The third ring-shaped ultraviolet lamp 22 is vertically arranged in front of the second ring-shaped ultraviolet lamp 21 and fixedly connected to its edge, forming a cross-shaped ring illumination structure.

[0030] When the exhaust gas enters the purification spherical vessel 17, the airflow drives the blades 182, which in turn rotate the first annular ultraviolet lamp 20. The rotation of the first annular ultraviolet lamp 20 allows the photocatalyst coating to be more fully exposed to ultraviolet light. Furthermore, the agitation of the airflow within the spherical vessel by the blades 182 ensures more thorough contact between the exhaust gas and the photocatalyst, thereby improving photocatalytic purification efficiency. Simultaneously, the rotation of the first annular ultraviolet lamp 20 also drives the second annular ultraviolet lamp 21 and the third annular ultraviolet lamp 22 to rotate together, causing the illumination area inside the spherical vessel to continuously change. Combined with the reflective effect of the inner wall reflective layer 19, this further eliminates blind spots in illumination, ensuring that all exhaust gas receives sufficient ultraviolet irradiation and enhancing the degradation effect of organic pollutants.

[0031] Example 2:

[0032] Based on Embodiment 1, magnetic attraction components are provided on the outer edge of the flip plate 13 and the groove wall of the slot 11 respectively. The magnetic attraction components include a strip-shaped first magnetic strip fixedly embedded in the outer edge of the flip plate 13 and a strip-shaped second magnetic strip fixedly embedded in the groove wall of the slot 11. The first magnetic strip and the second magnetic strip are positioned opposite each other and attract each other when the flip plate 13 and the groove wall of the slot 11 come into contact.

[0033] Both the first and second magnetic strips are made of permanent magnets, such as neodymium magnets or ferrite magnets. When the flip plate 13 abuts against the groove wall of the slot 11 under the action of the elastic reset member 14, the first and second magnetic strips attract each other, generating additional attraction force, which further presses the flip plate 13 against the groove wall of the slot 11, enhancing the sealing effect.

[0034] The magnetic suction assembly is particularly suitable for the following scenarios: when the torsion spring of the elastic reset element 14 fatigues due to long-term use, causing its elasticity to decrease, the magnetic suction force can compensate for the lack of elasticity, ensuring a tight fit between the flip plate 13 and the groove wall of the slot 11, maintaining good sealing performance. Furthermore, when the backflow pressure inside the processing chamber 2 is high, the magnetic suction force can prevent the flip plate 13 from being pushed open by the high-pressure gas, ensuring the reliability of the seal.

[0035] In this embodiment, both the first and second magnetic strips are continuous elongated structures that extend along the outer edge of the flip plate 13 and the full length of the groove wall of the slot 11. In other embodiments, the magnetic assembly can also use multiple spaced block magnets, which can also achieve the function of adsorption and sealing.

[0036] A guide ramp is provided at the entrance of the slot 11. The guide ramp is located at the entrance edge of the slot 11 on the side facing the purification box 1, and its inclination direction is at a certain angle to the moving direction of the filter plate 4, usually 30° to 60°.

[0037] When the filter plate 4 moves towards the processing box 2, the tilting plate 13 first contacts the guide ramp. Guided by the guide ramp, the tilting plate 13 smoothly deflects inward, avoiding impact and jamming caused by sudden force when it contacts the edge of the slot 11. The guide ramp makes the tilting plate 13 deflection process smoother, reduces wear between the tilting plate 13 and the slot 11 wall, and improves the stability and service life of the device.

[0038] In this embodiment, a guide ramp is provided at the entrance of the slot 11 facing the purification chamber 1. When the filter plate 4 returns from the processing chamber 2 to the purification chamber 1, a guide ramp can also be provided at the entrance of the slot 11 facing the processing chamber 2 to guide the flipping plate 13 to smoothly deflect inward, ensuring that the filter plate 4 returns to the purification position smoothly. The surface of the guide ramp is polished to further reduce the frictional resistance between the flipping plate 13 and the guide ramp, achieving a better guiding effect, reducing component wear, and extending the overall service life of the device.

[0039] like Figures 2 to 7 As shown, the tops of the purification chamber 1 and the treatment chamber 2 are respectively provided with horizontally extending moving grooves 5, and a horizontal screw 6 is rotatably installed inside the moving groove 5. One end of the horizontal screw 6 passes through the interior of the treatment chamber 2 and is connected to a first drive motor 7, which is fixed to the treatment chamber 2. The other end of the horizontal screw 6 is rotatably connected to the inner wall of the purification chamber 1. A drive block 8 is sleeved on the outer side of the horizontal screw 6, and the bottom of the drive block 8 is fixedly connected to the filter plate 4. When the horizontal screw 6 rotates, it drives the filter plate 4 to reciprocate along the moving groove 5.

[0040] The bottom of the purification chamber 1 and the treatment chamber 2 are respectively provided with guide grooves 9, and guide blocks 10 are slidably arranged in the guide grooves 9. The guide blocks 10 are fixedly connected to the filter plates 4. The cooperation between the guide blocks 10 and the guide grooves 9 guides and limits the movement of the filter plates 4, ensuring that the filter plates 4 move in a straight line in the horizontal direction and preventing deviation.

[0041] When the first drive motor 7 starts, it drives the horizontal screw 6 to rotate. The horizontal screw 6, through threaded engagement, drives the drive block 8 to slide back and forth along the moving groove 5. The drive block 8 then drives the filter plate 4 to move back and forth in the horizontal direction. By controlling the forward and reverse rotation of the first drive motor 7, the filter plate 4 can be moved back and forth between the purification box 1 and the treatment box 2.

[0042] like Figure 7 As shown, the processing box 2 is equipped with a cleaning component 15, which is used to backwash and clean the filter plate 4 that has been moved into the processing box 2.

[0043] The cleaning assembly 15 includes multiple mounting plates 151 that are equidistantly arranged vertically inside the processing box 2. The height of each mounting plate 151 corresponds one-to-one with the height of each filter plate 4. That is, each filter plate 4 corresponds to one mounting plate 151, and the mounting plate 151 is located in front of the position of the corresponding filter plate 4 after it has been moved into the processing box 2.

[0044] Five vertically extending slots 152 are provided on the front side of the mounting plate 151. A vertical lead screw 153 is rotatably installed in the middle slot 152. The upper or lower end of the drive end of the vertical lead screw 153 is connected to a second drive motor 154, which is fixed to the processing box 2. Telescopic tubes 155 are fixedly installed in the two slots 152 on both sides.

[0045] A backflush pipe 156 and a cleaning pipe 157 are provided on the front side of the mounting plate 151. The cleaning pipe 157 is located below the backflush pipe 156, and multiple nozzles 158 are arranged at intervals on the front side of the cleaning pipe 157. A fixing block 159 is fixedly provided on the rear side of the backflush pipe 156 and the cleaning pipe 157. The fixing block 159 is sleeved on the outside of the vertical threaded rod 153 and threadedly connected to it.

[0046] One end of the backflushing air pipe 156 and the cleaning pipe 157 are connected to the corresponding telescopic fitting 155 via connecting pipes. The telescopic fitting 155 is a telescopic tubular structure, and its length can be adaptively changed as the backflushing air pipe 156 and the cleaning pipe 157 are raised or lowered to ensure continuous and unobstructed air and liquid passages. The air inlet / liquid inlet ends of the backflushing air pipe 156 and the cleaning pipe 157 extend to the outside of the treatment tank 2 and are fixedly installed with connecting flanges, which can be connected to external air / liquid supply lines.

[0047] When the second drive motor 154 drives the vertical lead screw 153 to rotate, the fixing block 159 reciprocates along the axial direction of the vertical lead screw 153 under the action of the threaded engagement. The fixing block 159 drives the backwash pipe 156 and the cleaning pipe 157 to reciprocate along the axial direction of the vertical lead screw 153. During the lifting and lowering process, the backwash pipe 156 sprays high-pressure gas, such as compressed air or nitrogen, onto the surface of the filter plate 4, blowing off the particles on the surface of the filter plate 4; the cleaning pipe 157 sprays cleaning liquid, such as water or special cleaning agent, onto the surface of the filter plate 4 through the nozzle 158 to rinse the filter plate 4. The lifting and lowering movement of the backwash pipe 156 and the cleaning pipe 157, combined with the air / liquid spraying action, realizes a scanning backwash cleaning of the surface of the filter plate 4, ensuring that the entire surface of the filter plate 4 is effectively cleaned.

[0048] Example 3:

[0049] Based on Example 2, a pull-out box 16 is detachably provided at the bottom of the processing box 2. The pull-out box 16 is located below the cleaning assembly 15 and is used to collect contaminants that are detached during backwashing.

[0050] Specifically, the bottom of the treatment box 2 is hollow, with a discharge port at the bottom. Below the discharge port is a pull-out box 16. When the cleaning component 15 backwashes the filter plate 4, particles and contaminants that fall off the surface of the filter plate 4 fall downwards under the influence of gravity and airflow, passing through the hollow discharge port at the bottom of the treatment box 2 and falling into the pull-out box 16. Operators can periodically pull out the pull-out box 16, clean out the contaminants, and reinstall it, achieving centralized collection and periodic cleaning of contaminants and preventing contaminants from accumulating inside the treatment box 2.

[0051] Since filter plate 4 has been completely removed from purification chamber 1 and entered treatment chamber 2, all the pollutants detached during backflushing fall into the pull-out box 16 at the bottom of treatment chamber 2, preventing secondary pollution to the other filter plates 4 and the purified gas inside purification chamber 1. Simultaneously, the slot 11 between treatment chamber 2 and purification chamber 1 is closed by a flip plate 13, further blocking the path of pollutants flowing back from treatment chamber 2 to purification chamber 1, ensuring the cleanliness of the purification process.

[0052] The implementation principle of the multi-layer purification treatment device for petrochemical waste gas according to this application is as follows: In use, the petrochemical waste gas first enters the purification spherical vessel 17 at the front of the purification tank 1, where it undergoes photocatalytic purification treatment. After photocatalytic purification, the waste gas enters the purification tank 1, where it passes through multiple layers of filter plates 4 to intercept and adsorb particulate matter and gaseous pollutants. The purified gas is then discharged from the purification tank 1.

[0053] According to the cleaning cycle preset by the control system, the first drive motor 7 is activated for each filter plate 4. The first drive motor 7 drives the horizontal screw 6 to rotate, and the horizontal screw 6 drives the filter plate 4 to move horizontally towards the processing box 2 along the moving groove 5 and the guide groove 9 through the drive block 8.

[0054] When the filter plate 4 moves, the hinged flip plates 13 on both sides are pressed against the groove wall of the slot 11, overcoming the elastic force of the elastic reset member 14 and deflecting inward, so that the filter plate 4 can smoothly pass through the slot 11 and enter the processing box 2. After the filter plate 4 is completely removed from the slot 11, the flip plates 13 automatically reset under the action of the elastic reset member 14 and re-close the slot 11.

[0055] After the filter plate 4 enters the treatment box 2, the cleaning assembly 15 is activated. The second drive motor 154 drives the vertical lead screw 153 to rotate, causing the backwash air pipe 156 and the cleaning pipe 157 to move up and down vertically. During the lifting and lowering process, the backwash air pipe 156 sprays high-pressure gas onto the surface of the filter plate 4, and the cleaning pipe 157 sprays cleaning fluid onto the surface of the filter plate 4 through the nozzle 158, performing a scanning backwash cleaning on the surface of the filter plate 4. The cleaned-off contaminants fall downwards into the pull-out box 16.

[0056] After cleaning is completed, the second drive motor 154 rotates in the reverse direction, resetting the backflushing air pipe 156 and the cleaning pipe 157. Then, the first drive motor 7 drives the horizontal screw 6 in the reverse direction, causing the filter plate 4 to return from the processing box 2 to the purification box 1. During the return process of the filter plate 4, the flip plate 13 is once again pressed inward by the groove wall of the slot 11, allowing the filter plate 4 to smoothly pass through the slot 11 and return to the purification position. After the filter plate 4 has completely returned to the purification position, the flip plate 13 automatically resets and closes the slot 11. This "clean one by one, and the rest continue to work" mode enables the entire device to operate continuously without stopping.

[0057] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0058] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the interaction relationship between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0059] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simplification, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A multi-layer purification and treatment device for petrochemical waste gas, characterized in that: The device includes a purification chamber, with a processing chamber attached to one side. Several vertical slots are spaced apart on the side wall between the purification chamber and the processing chamber, connecting the two chambers. Multiple sets of filter frames are spaced apart vertically inside the purification chamber, and filter plates are movably embedded within each frame. The filter plates can reciprocate horizontally through the slots into the processing chamber. Flip plates are hinged to both ends of the filter plates along their direction of movement via connecting shafts. An elastic reset element is provided between the flip plates and the filter plates, driving the flip plates to deflect away from the filter plates. When the filter plate is in the purification position inside the purification chamber, the outer edge of the flip plate abuts against the groove wall under the action of the elastic reset member, sealing the groove; when the filter plate moves towards the processing chamber and passes through the groove, the flip plate overcomes the elastic force of the elastic reset member and deflects inward under the pressure of the groove wall, allowing the filter plate to pass through the groove; when the filter plate is completely removed from the groove, the flip plate automatically resets under the action of the elastic reset member, resealing the groove. The treatment box is equipped with a cleaning component for backwashing and cleaning the filter plates that are moved into the treatment box; a purification ball tank is fixedly installed on the front side of the purification box, and a purification component is installed inside the purification ball tank for purifying the waste gas entering the purification ball tank.

2. The multi-layer purification and treatment device for petrochemical waste gas according to claim 1, characterized in that: The outer edge of the flip plate is provided with a magnetic attraction component corresponding to the groove wall of the slot. When the flip plate abuts against the groove wall of the slot, the magnetic attraction components attract each other and press the flip plate tightly against the groove wall of the slot.

3. The multi-layer purification and treatment device for petrochemical waste gas according to claim 2, characterized in that: The magnetic attraction assembly includes a first strip-shaped magnetic strip fixedly embedded on the outer edge of the flip plate and a second strip-shaped magnetic strip fixedly embedded in the slotted wall. The first magnetic strip and the second magnetic strip are positioned opposite each other and attract each other when the flip plate abuts against the slotted wall.

4. The multi-layer purification and treatment device for petrochemical waste gas according to claim 1, characterized in that: A guide ramp is provided at the entrance of the slot. The guide ramp is used to guide the flip plate to deflect smoothly inward when the filter plate moves toward the processing box.

5. The multi-layer purification and treatment device for petrochemical waste gas according to claim 1, characterized in that: The purification box and the treatment box have corresponding horizontally extending moving grooves on their tops. A horizontal screw is rotatably installed in the moving groove. One end of the horizontal screw passes through the interior of the treatment box and is connected to a first drive motor. The other end of the horizontal screw is rotatably connected to the inner wall of the purification box. A drive block is sleeved on the outside of the horizontal screw. The bottom of the drive block is fixedly connected to the filter plate. When the horizontal screw rotates, it drives the filter plate to move back and forth along the moving groove. The bottom of the purification box and the treatment box are respectively provided with guide grooves, and guide blocks are slidably arranged in the guide grooves. The guide blocks are fixedly connected to the filter plate.

6. The multi-layer purification and treatment device for petrochemical waste gas according to claim 1, characterized in that: The cleaning assembly includes multiple mounting plates that are equidistantly arranged in a vertical direction and are fixedly installed inside the processing box. The installation height of each mounting plate corresponds one-to-one with the installation height of each filter plate. The front side of the mounting plate has three vertically extending strip grooves. A vertical screw rod is rotatably installed in the middle strip groove, and the driving end of the vertical screw rod is connected to a second drive motor. Telescopic tubes are fixedly installed in the strip grooves on both sides. The front side of the mounting plate is provided with a backflush air pipe and a cleaning pipe. The cleaning pipe is located below the backflush air pipe, and multiple nozzles are spaced apart on the front side of the cleaning pipe. A fixing block is fixedly provided on the rear side of the backflush air pipe and the cleaning pipe. The fixing block is sleeved on the outside of the vertical screw and threadedly connected to it. One end of the backwash pipe and the cleaning pipe are respectively connected to the corresponding telescopic pipe through connecting pipes; when the second drive motor drives the vertical screw to rotate, the fixed block drives the backwash pipe and the cleaning pipe to reciprocate up and down along the axial direction of the vertical screw, and performs scanning backwash cleaning on the surface of the filter plate.

7. The multi-layer purification and treatment device for petrochemical waste gas according to claim 6, characterized in that: The bottom of the treatment box is detachably equipped with a pull-out box, which is located below the cleaning assembly and is used to collect contaminants that are detached during backflushing. The bottom of the treatment box is hollow, and the air / liquid inlet ends of the backflushing air pipe and the cleaning pipe pass through to the outside of the treatment box and are fixedly installed with connecting flanges.

8. The multi-layer purification and treatment device for petrochemical waste gas according to claim 1, characterized in that: The purification component includes a first annular ultraviolet lamp rotatably disposed inside the purification spherical vessel. Multiple blades are arranged in a ring array on the inner side of the first annular ultraviolet lamp, and the surface of the blades is coated with a photocatalyst coating. The inner wall of the purification spherical vessel is provided with a reflective layer. Inside the first ring ultraviolet lamp, the second and third ring ultraviolet lamps are arranged in a cross shape. The radiation intensity of each ring ultraviolet lamp increases or decreases from the outside to the inside.

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