Anti-scaling and self-cleaning device and method for industrial tail gas treatment system

Abstract

The invention relates to the technical field of industrial waste gas treatment, in particular to an anti-scaling and self-cleaning device and method for an industrial tail gas treatment system.A spraying device is arranged in a tail gas tower or a tail gas recovery kettle tail gas tower, washing liquid is evenly sprayed into a pipeline through a spraying head, tiny liquid foam is formed, the pipe wall is fully wetted and washed, and the anti-scaling and self-cleaning device is formed. The system is provided with a circulating water tank, a net-shaped filter plate and a circulating pump, continuous circulating spraying of washing liquid is achieved, in addition, a back flushing cleaning mechanism is additionally arranged on the back water side of the net-shaped filter plate, back flushing can be conducted on the filter plate, and blocking is avoided. According to the scheme, the problems that in the traditional tail gas treatment process, a pipeline is prone to scaling, and a filtering assembly is prone to being blocked are effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of industrial waste gas treatment, in particular to a scale prevention and self-cleaning device and method for an industrial tail gas treatment system. BACKGROUND

[0002] In the process of industrial production, a large amount of tail gas containing acidic or alkaline components will be generated. In order to protect the environment and meet the emission standards, tail gas treatment towers (such as scrubbing towers, absorption towers) are usually used to purify and treat these tail gases. One widely used technology is to use a circulating neutralizing liquid (such as an alkaline solution for neutralizing acidic tail gas, or an acidic solution for neutralizing alkaline tail gas) to contact the tail gas in counterflow or crossflow, and to remove pollutants through chemical neutralization reaction.

[0003] In this process system, the treated neutralizing liquid is collected and enters the circulation system for reuse. In order to ensure the cleanliness of the circulating liquid, prevent the clogging of the spray device, and maintain high reaction efficiency, the circulating liquid usually needs to be treated by a filtering device before re-entering the tail gas tower. However, in actual operation, this circulating filtration system faces a significant technical problem: clogging of the filter assembly caused by scaling.

[0004] This scaling phenomenon is mainly caused by the continuous attachment and accumulation of suspended solids in the circulating liquid, reaction-generated salt crystals, and other impurities on the surface of the filter assembly. As the running time increases, the scaling problem will become more and more serious, causing the filter channel to narrow, the filtration resistance to increase, and the filtration efficiency to decrease significantly. This not only causes insufficient circulation flow of the system, affecting the final treatment effect of the tail gas, but also causes the overall energy consumption of the system to rise. More seriously, frequent blockage requires manual cleaning or replacement of the filter assembly, which not only increases maintenance costs and labor intensity, but also affects the continuity and stability of industrial production.

[0005] Therefore, the existing tail gas treatment system circulating filtration unit has the defects of easy clogging, frequent maintenance, unstable operation efficiency, and high overall operation cost due to scaling. Therefore, a technical solution that can effectively prevent scaling and has self-cleaning ability is urgently needed to ensure that the tail gas treatment system can operate long-term, stably and efficiently. SUMMARY

[0006] In view of the problems existing in the prior art, a device and method for preventing scale formation and self-cleaning of an industrial tail gas treatment system are provided, a spraying device is arranged in a tail gas tower, a washing liquid is uniformly sprayed in the tail gas tower through a spraying head to form fine liquid foam, the tail gas tower wall is fully wetted and washed, the by-products are effectively prevented from being attached, and the generated loose scale is dissolved, the system is provided with a circulating water tank, a mesh filter plate and a circulating pump to realize continuous circulation spraying of the washing liquid, and in addition, a backflush cleaning mechanism is additionally arranged on the backwater side of the mesh filter plate to backflush the filter plate to avoid blockage. The scheme effectively solves the problem that the filtering assembly is easily blocked in the traditional tail gas treatment process.

[0007] To solve the problems in the prior art, the present application provides a device for preventing scale formation and self-cleaning of an industrial tail gas treatment system, which is applied to scale prevention treatment of a tail gas tower and includes: a spraying pipeline, which is provided with a spraying head extending into the tail gas tower; a circulating water tank, which is internally provided with a mesh filter plate, the mesh filter plate divides the inner cavity of the circulating water tank into a treatment cavity and a clean water cavity, the bottom of the inner cavity of the tail gas tower is connected to the treatment cavity of the circulating water tank through a drain pipeline, and the top of the treatment cavity is provided with a feeding opening; a circulating pump, whose input port is connected to the clean water cavity of the circulating water tank through a water pumping pipeline, and the output port of the circulating pump is connected to the spraying pipeline; and a backflush cleaning mechanism, which includes a flushing execution assembly and a flushing driving assembly, the flushing execution assembly is arranged on the backwater side of the mesh filter plate in the vertical direction, the flushing execution assembly has a drainage port for guiding the liquid in the treatment cavity of the circulating water tank to pass through the mesh filter plate when the flushing execution assembly moves in the vertical direction, and the flushing driving assembly is arranged on the top of the circulating water tank to drive the flushing execution assembly to move in the vertical direction.

[0008] Preferably, the flushing execution assembly includes: a lifting frame, which is arranged on the backwater side of the mesh filter plate in the vertical direction and is in transmission connection with the flushing driving assembly; first and second drainage rollers, which are arranged in the lifting frame in parallel rotation, the circumferential surfaces of the first and second drainage rollers are provided with blades distributed in the circumferential direction thereof, the end of the first drainage roller is provided with a first gear and a reverse ratchet gear, the end of the second drainage roller is provided with a second gear and a forward ratchet gear, and the first and second gears are in meshing connection; and a rack, which is arranged on the backwater side of the mesh filter plate in the vertical direction and is in meshing connection with the reverse ratchet gear and the forward ratchet gear, the reverse ratchet gear drives the first drainage roller to rotate when the reverse ratchet gear reversely rotates, and the forward ratchet gear drives the second drainage roller to rotate when the forward ratchet gear forwardly rotates.

[0009] Preferably, the reverse ratchet gear includes: a reverse internal ratchet wheel, which is coaxially rotationally connected to the end of the first drainage roller, the inner wall of the reverse internal ratchet wheel is provided with reverse ratchet grooves distributed in the circumferential direction thereof, and the outer circumferential surface of the reverse internal ratchet wheel is in meshing transmission cooperation with the rack. The reverse transmission disc is coaxially arranged in the reverse inner ratchet wheel and is provided with first positioning columns distributed along the circumference thereof, and the end of the first drainage roller is fixedly connected with the reverse transmission disc coaxially; the reverse pawl is distributed along the circumference on the reverse transmission disc and is rotationally connected with the reverse transmission disc; the first elastic element has two ends fixedly connected with the reverse pawl and the first positioning column respectively, and the reverse pawl elastically abuts against the inner wall of the reverse inner ratchet wheel; wherein, when the lifting frame moves downward, the reverse inner ratchet wheel drives the first drainage roller to rotate reversely.

[0010] Preferably, the forward ratchet gear comprises: a forward inner ratchet wheel coaxially rotationally connected with the end of the second drainage roller, and the inner wall of the forward inner ratchet wheel is arranged with forward ratchet grooves distributed along the circumference thereof, and the outer circumferential surface of the forward inner ratchet wheel is in meshing transmission cooperation with the rack; a forward transmission disc coaxially arranged in the forward inner ratchet wheel and provided with second positioning columns distributed along the circumference thereof, and the end of the second drainage roller is fixedly connected with the forward transmission disc coaxially; a forward pawl distributed along the circumference on the forward transmission disc and rotationally connected with the forward transmission disc; a second elastic element having two ends fixedly connected with the forward pawl and the second positioning column respectively, and the forward pawl elastically abuts against the inner wall of the forward inner ratchet wheel; wherein, when the lifting frame moves upward, the forward inner ratchet wheel drives the second drainage roller to rotate forwardly.

[0011] Preferably, the rack is slidingly arranged on the backwater side of the mesh filter plate along the thickness direction of the mesh filter plate, and an elastic buffer assembly is arranged between the rack and the mesh filter plate; the flushing execution assembly further comprises: a guide plate arranged on the backwater side of the mesh filter plate along the vertical direction, and the side of the guide plate facing the mesh filter plate is provided with a wave groove, and the lifting frame is slidingly matched with the wave groove of the guide plate.

[0012] Preferably, the lifting frame is provided with a roller at the contact position with the guide plate, and the roller is rolling matched with the guide plate.

[0013] Preferably, the flushing driving assembly comprises: a driving frame arranged on the backwater side of the mesh filter plate along the vertical direction, and the lifting frame is slidingly arranged on the bottom of the driving frame along the thickness direction of the mesh filter plate; a linear push rod arranged on the top of the circulating water tank along the vertical direction, and the output rod of the linear push rod is connected with the driving frame.

[0014] Preferably, the mesh filter plate is provided with a through hole with a first stepped groove; the elastic buffer assembly further comprises: a sliding rod fixedly arranged on the rack and slidingly penetrating through the through hole, and the sliding rod is provided with a second stepped groove; and an elastic buffer element is sleeved on the sliding rod and located between the first stepped groove and the second stepped groove.

[0015] Preferably, the bottom of the water purification cavity of the circulating water tank is further provided with a drain pipe, and the drain pipe is provided with a drain valve; the top of the water purification cavity of the circulating water tank is further provided with an overflow pipe and a water inlet pipe, the overflow pipe is communicated with the drain pipe, and the water inlet pipe is provided with a float valve at the communication position with the circulating water tank.

[0016] A method for anti-fouling and self-cleaning of an industrial tail gas treatment system, using an anti-fouling and self-cleaning device for an industrial tail gas treatment system, comprising the following steps: Step one, pumping the liquid in the water purification chamber into the tail gas tower for spraying through the circulating pump, and returning the sewage after washing to the treatment chamber through the sewage pipeline; Step two, filtering the sewage returned to the treatment chamber through the mesh filter plate, trapping impurities, and filtering the clean water into the water purification chamber for recycling; Step three, moving the driving flushing assembly up and down to guide the liquid to reverse flush the mesh filter plate, remove the attached impurities, and restore the filtering capacity.

[0017] The beneficial effects of the present application compared with the prior art are: The spraying device is arranged in the tail gas tower, the washing liquid is uniformly sprayed in the tail gas tower pipeline through the spraying head, fine liquid foam is formed, the tail gas tower wall is fully wetted and flushed, the by-products are effectively prevented from adhering, and the generated loose scale is dissolved, the system is provided with a circulating water tank, a mesh filter plate and a circulating pump, the continuous circulation spraying of the washing liquid is realized, in addition, the backflushing cleaning mechanism is additionally arranged on the backwater side of the mesh filter plate, the filter plate is reversely flushed, and blockage is avoided. The scheme effectively solves the problems of easy scale accumulation in the pipeline and easy blockage of the filter assembly in the traditional tail gas treatment process. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic view of an anti-fouling and self-cleaning device for an industrial tail gas treatment system of the present application.

[0019] Figure 2 is a perspective view of a mesh filter plate and a backflushing cleaning mechanism in an anti-fouling and self-cleaning device for an industrial tail gas treatment system of the present application.

[0020] Figure 3 is a front view of a mesh filter plate and a backflushing cleaning mechanism in an anti-fouling and self-cleaning device for an industrial tail gas treatment system of the present application.

[0021] Figure 4 is Figure 3 A-A direction sectional view.

[0022] Figure 5 is Figure 4 A local enlarged view at B of

[0023] Figure 6 is Figure 3 C-C direction sectional view of

[0024] Figure 7 is Figure 6 A local enlarged view at D of

[0025] Figure 8 This is a perspective view of the backwash cleaning mechanism in an anti-scaling and self-cleaning device for an industrial exhaust gas treatment system according to the present invention.

[0026] Figure 9 This is a perspective view of the first and second diversion rollers in an anti-scaling and self-cleaning device for an industrial exhaust gas treatment system according to the present invention.

[0027] Figure 10 This is an exploded perspective view of the reverse ratchet and the forward ratchet in an anti-scaling and self-cleaning device for an industrial exhaust gas treatment system according to the present invention.

[0028] Figure 11 This is a schematic diagram of a second structure of the circulating water tank in an anti-scaling and self-cleaning device for an industrial exhaust gas treatment system according to the present invention.

[0029] The diagram is labeled as follows: 1. Spray pipe; 11. Spray head; 2. Circulating water tank; 21. Mesh filter plate; 22. Treatment chamber; 23. Clean water chamber; 24. Inlet; 251. Drain pipe; 252. Drain valve; 253. Overflow pipe; 254. Inlet pipe; 255. Float valve; 256. Inlet valve; 3. Drainage pipe; 4. Circulating pump; 51. Flushing actuator; 511. Lifting frame; 5121. First diversion roller; 5122. Second diversion roller; 5123. Blade; 5131. First gear; 5132. Second gear; 514. Reverse ratchet; 514 1. Reverse inner ratchet; 5142. Reverse transmission disc; 5143. First positioning post; 5144. Reverse pawl; 5145. First elastic element; 515. Forward ratchet; 5151. Forward inner ratchet; 5152. Forward transmission disc; 5153. Second positioning post; 5154. Forward pawl; 5155. Second elastic element; 516. Rack; 5171. Sliding rod; 5172. Elastic buffer element; 518. Guide plate; 519. Roller; 52. Flushing drive assembly; 521. Drive frame; 522. Linear push rod; 6. Exhaust gas tower; 7. Pumping pipe. Detailed Implementation

[0030] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0031] The device includes: a duct spray system, a liquid discharge system, a circulating water system, and an automatic dosing system.

[0032] 1. Duct spray system: Several spray heads 11 are installed at intervals along the airflow direction on the top or upper inner wall of the exhaust gas tower 6. These spray heads 11 are used to spray washing liquid onto the inner wall of the exhaust gas tower 6 to form a liquid film, wet and flush the pipe wall, prevent by-products from adhering and dissolve the loose scale layer that has been formed.

[0033] 2. Liquid discharge system: A liquid discharge port is opened at the lowest point of the exhaust gas tower 6 or at the bottom of the downstream pipe, and connected to a drain pipe 3 to collect the waste liquid generated by the spraying inside the exhaust gas tower 6 and the impurities washed down.

[0034] 3. Circulating water system: includes a circulating water tank 2. A drain pipe 251 is connected to the inlet of the circulating water tank 2, and the water supply pipeline of the exhaust gas tower 6 spray system is connected to the outlet of the circulating water tank 2 via a circulating water pump, thus forming an independent circulation loop. The circulating water tank 2 is equipped with a water replenishment pipe, an overflow pipe 253, and a drain valve for easy replacement of circulating water and cleaning of the circulating water tank 2.

[0035] 4. Automatic dosing system: This includes a dosing pump and an online pH monitoring instrument. The probe of the pH monitoring instrument is installed inside the circulating water tank 2 to monitor the pH value of the circulating liquid in real time. The dosing pump is connected to the chemical tank and automatically starts and stops according to the feedback signal from the online pH monitoring instrument, adding neutralizing agent to the circulating water tank 2 to maintain the circulating liquid within a preset range that can effectively dissolve by-products.

[0036] The nozzles of the exhaust gas tower 6 spray system are optimized to spiral nozzles or wide-angle fan nozzles to ensure a large coverage area and strong impact force, which can effectively wash away the by-products inside the exhaust gas tower 6.

[0037] The anti-scaling and self-cleaning method of the above-mentioned device includes the following steps: S1: Turn on the circulating water pump to deliver the washing liquid in the circulating water tank 2 to the spray head 11 on the inner wall of the exhaust gas tower 6; S2; Spray head 11 sprays and cleans the inner wall of tail gas tower 6. The washing liquid flows down the pipe wall under the action of gravity, wetting, rinsing and dissolving the scale layer. S3: Waste liquid carrying impurities flows back to circulating water tank 2 through drain pipe 251 at the lowest point of tail gas tower 6; S4: The pH online detector monitors the pH value of the liquid in the circulating water tank 2 in real time and automatically adds chemicals through the dosing pump to maintain the chemical activity of the circulating liquid; S5: Periodically discharge some high-concentration wastewater through the drain valve of circulating water tank 2 and replenish fresh water to maintain the water quality of the circulating water system.

[0038] like Figure 1 , Figure 2 , Figure 3 , Figure 8 and Figure 11As shown, an anti-scaling and self-cleaning device for an industrial exhaust gas treatment system is applied to the anti-scaling treatment of an exhaust gas tower 6. It includes: a spray pipe 1 with spray heads 11 extending into the exhaust gas tower 6; a circulating water tank 2 with a mesh filter plate 21 installed inside, the mesh filter plate 21 dividing the inner cavity of the circulating water tank 2 into a treatment chamber 22 and a clean water chamber 23. The bottom of the inner cavity of the exhaust gas tower 6 is connected to the treatment chamber 22 of the circulating water tank 2 via a drain pipe 3, and the top of the treatment chamber 22 has a discharge port 24; and a circulating pump 4, whose inlet is connected to a pump... Water pipe 7 is connected to the clean water chamber 23 of the circulating water tank 2, and the output port of the circulating pump 4 is connected to the spray pipe 1; the backwash cleaning mechanism includes a flushing execution component 51 and a flushing drive component 52. The flushing execution component 51 is arranged vertically on the back water side of the mesh filter plate 21. The flushing execution component 51 has a drain port that guides the liquid in the treatment chamber 22 of the circulating water tank 2 through the mesh filter plate 21 when it moves vertically. The flushing drive component 52 is arranged on the top of the circulating water tank 2 to drive the flushing execution component 51 to move vertically.

[0039] First, a special agent is added to the treatment chamber 22 of the circulating water tank 2 through the dosing port, mixing with water to form a washing liquid with specific purification and washing functions. The washing liquid is transported to the spray pipe 1 by the circulating pump 4 and evenly sprayed into the interior of the tail gas tower 6 by the spray head 11, forming fine liquid droplets. These droplets can fully wet and flush the pipe wall, effectively preventing the adhesion of by-products, while dissolving the loose scale that has already formed. After use, the washing liquid, carrying the flushed impurities, flows back to the treatment chamber 22 of the circulating water tank 2 through the drain pipe 3. The liquid is purified when it flows through the mesh filter plate 21, and solid impurities are intercepted. The clear liquid enters the clean water chamber 23 and is drawn back by the circulating pump 4, realizing the continuous recycling of the washing liquid. To ensure the filtration effect, the backwash cleaning mechanism is activated periodically. The flushing drive component 52 drives the flushing execution component 51 to move vertically, guiding the liquid in the treatment chamber 22 to pass through the mesh filter plate 21 in the reverse direction, flushing away the blockages attached to the filter plate and maintaining the smooth operation of the system.

[0040] The dosing port allows for flexible configuration of targeted washing solutions, enhancing the system's adaptability and treatment efficiency for different exhaust gas components. The spray system effectively prevents scaling on the inner wall of the exhaust gas tower 6 and dissolves existing loose scale, ensuring long-term unobstructed pipeline flow. The circulating water tank 2 and circulating pump 4 enable the recycling of the washing solution, saving water resources and chemical agents. The integrated backwash cleaning mechanism effectively prevents clogging of the mesh filter plate 21, ensuring continuous and stable filtration performance and long-term reliable operation of the entire system. The synergistic effect of the overall structure comprehensively solves the problems of easy scaling in pipelines and easy clogging of filter components in traditional exhaust gas treatment processes.

[0041] like Figure 4 , Figure 5 , Figure 8 ,Figure 9 and Figure 10 As shown, the rinsing execution assembly 51 includes: a lifting frame 511, vertically disposed on the back side of the mesh filter plate 21, the lifting frame 511 being connected to the rinsing drive assembly 52; a first guide roller 5121 and a second guide roller 5122, rotatably disposed in the lifting frame 511, the first guide roller 5121 and the second guide roller 5122 having blades 5123 distributed circumferentially on their circumferential surfaces, and the end of the first guide roller 5121 having a first gear 5131 and a reverse gear. The first gear 5131 and the second gear 5132 mesh with the first gear 5131 and the second gear 5132 at the end of the ratchet 514 and the second guide roller 5122, respectively. The rack 516 is arranged vertically on the back side of the mesh filter plate 21 and meshes with the reverse ratchet 514 and the forward ratchet 515. When the reverse ratchet 514 rotates in the reverse direction, it drives the first guide roller 5121 to rotate. When the forward ratchet 515 rotates in the forward direction, it drives the second guide roller 5122 to rotate.

[0042] The flushing actuator 51 consists of a lifting frame 511, a guide roller system, and a transmission rack 516. The lifting frame 511 is arranged vertically on the back side of the mesh filter plate 21 and forms a transmission connection with the flushing drive assembly 52 at the top. A first guide roller 5121 and a second guide roller 5122 are arranged in parallel in the lifting frame 511, and the circumferential surfaces of the two rollers are evenly distributed with circumferentially arranged blades 5123. The end of the first guide roller 5121 is equipped with a first gear 5131 and a reverse ratchet 514, while the end of the second guide roller 5122 is provided with a second gear 5132 and a forward ratchet 515, wherein the first gear 5131 and the second gear 5132 are in a meshing state.

[0043] A rack 516, vertically arranged along the backwater side of the mesh filter plate 21, engages with both a reverse ratchet 514 and a forward ratchet 515 for transmission. When the lifting frame 511 moves vertically along the rack 516, the reverse ratchet 514 drives the first guide roller 5121 to rotate in the reverse rotation state, while the forward ratchet 515 drives the second guide roller 5122 to rotate in the forward rotation state. This dual roller system design ensures that during the lifting and lowering process, the flushing actuator 51 continuously guides the liquid in the treatment chamber 22 to pass through the filter plate in the reverse direction through the alternating rotation of the two guide rollers, forming an effective flushing flow field.

[0044] During operation, when the flushing drive assembly 52 pushes the lifting frame 511 to move vertically along the rack 516, the first guide roller 5121 and the second guide roller 5122 rotate in the set directions through the meshing transmission of the ratchet and the rack 516. The roller blades 5123 provide guidance during rotation, directing the liquid in the treatment chamber 22 of the circulating water tank 2 to form a directional flow, effectively penetrating the mesh filter plate 21 and achieving deep cleaning of the filter plate pores. This design ensures a stable and uniform backwashing effect throughout the entire stroke of the flushing actuator 51.

[0045] like Figure 7 and Figure 10 As shown, the reverse ratchet 514 includes: a reverse inner ratchet 5141, coaxially rotatably connected to the end of the first guide roller 5121, with reverse ratchet grooves distributed circumferentially on its inner wall, and the outer circumferential surface of the reverse inner ratchet 5141 meshing with the rack 516; and a reverse transmission disk 5142, coaxially rotatably disposed in the reverse inner ratchet 5141 and provided with first positioning posts 5143 distributed circumferentially thereon, the end of the first guide roller 5121 being connected to the reverse transmission disk 5141. 42 are coaxially fixedly connected; a reverse pawl 5144 is distributed circumferentially on the reverse transmission disk 5142 and is rotatably connected to the reverse transmission disk 5142; a first elastic element 5145 has its two ends fixedly connected to the reverse pawl 5144 and the first positioning post 5143 respectively, and the reverse pawl 5144 elastically abuts against the inner wall of the reverse inner ratchet 5141; wherein, when the lifting frame 511 moves downward, the reverse inner ratchet 5141 drives the first diverting roller 5121 to rotate in the opposite direction.

[0046] When the flushing drive assembly 52 drives the lifting frame 511 to move downward along the rack 516, the reverse inner ratchet 5141 rotates under the meshing action of the rack 516. At this time, its inner wall pushes the reverse pawl 5144 through the ratchet groove, overcoming the elastic force of the first elastic element 5145 and causing it to deflect slightly. Then, it forms a rigid push with the reverse transmission disc 5142, thereby transmitting torque to the first diverting roller 5121 and driving it to rotate in the opposite direction. At the same time, through the meshing transmission of the end first gear 5131 and the second gear 5132, the second diverting roller 5122 is driven to rotate in the forward direction. When the lifting frame 511 moves upward, the reverse inner ratchet 5141 rotates in the reverse direction, the reverse pawl 5144 slides through the ratchet groove and returns to its original position under the action of the first elastic element 5145. At this time, the first diverting roller 5121 does not generate driving rotation. The working logic of the forward ratchet 515 is symmetrical and opposite, ensuring that the second guide roller 5122 is driven to rotate in the forward direction when the lifting frame 511 moves upward. In this way, the first guide roller 5121 and the second guide roller 5122 work alternately during the bidirectional movement of the lifting frame 511, and the blades 5123 on their roller surfaces continuously guide the liquid to penetrate the filter plate in the reverse direction.

[0047] like Figure 7 and Figure 10 As shown, the forward ratchet 515 includes: a forward inner ratchet 5151, which is coaxially rotatably connected to the end of the second guide roller 5122, and has forward ratchet grooves distributed circumferentially on its inner wall; the outer circumferential surface of the forward inner ratchet 5151 meshes with the rack 516 for transmission; and a forward transmission disk 5152, which is coaxially rotatably disposed in the forward inner ratchet 5151 and has second positioning pins 5153 distributed circumferentially thereon; the end of the second guide roller 5122 is connected to the forward transmission disk 5151. 52 are coaxially fixedly connected; a forward pawl 5154 is distributed circumferentially on the forward transmission disk 5152 and rotatably connected to the forward transmission disk 5152; a second elastic element 5155 has its two ends fixedly connected to the forward pawl 5154 and the second positioning post 5153 respectively, and the forward pawl 5154 elastically abuts against the inner wall of the forward inner ratchet 5151; wherein, when the lifting frame 511 moves upward, the forward inner ratchet 5151 drives the second diversion roller 5122 to rotate in the forward direction.

[0048] When the flushing drive assembly 52 drives the lifting frame 511 to move downward along the rack 516, the reverse inner ratchet 5141 rotates under the action of the rack 516. The ratchet groove on its inner wall pushes the reverse pawl 5144, and transmits torque to the first diverting roller 5121 through the reverse transmission disc 5142, driving it to rotate in the opposite direction. At the same time, due to the meshing of the first gear 5131 and the second gear 5132, the second diverting roller 5122 is driven to rotate forward, and the forward ratchet 515 at its end is in an overrunning state (the forward pawl 5154 slides across the inner wall of the forward inner ratchet 5151). When the lifting frame 511 moves upward, the forward inner ratchet 5151 is driven to rotate by the rack 516, and its inner wall pushes the forward pawl 5154, thereby driving the forward transmission disk 5152 and the second diversion roller 5122 to rotate in the forward direction; at this time, the reverse ratchet 514 is in an overrunning state (the reverse pawl 5144 slides across the inner wall of the reverse inner ratchet 5141). Thus, regardless of whether the lifting frame 511 moves up or down, the first diversion roller 5121 and the second diversion roller 5122 rotate in the opposite direction toward the mesh filter plate 21, and the blades 5123 on their roller surfaces continuously guide the liquid to penetrate the mesh filter plate 21 in the reverse direction, forming an uninterrupted and effective flushing.

[0049] like Figure 7 As shown, the rack 516 is slidably disposed on the back side of the mesh filter plate 21 along the thickness direction of the mesh filter plate 21, and an elastic buffer assembly is provided between the rack 516 and the mesh filter plate 21; the flushing execution assembly 51 also includes: a guide plate 518, which is disposed vertically on the back side of the mesh filter plate 21, and a wave groove is provided on the side of the guide plate 518 facing the mesh filter plate 21, and the lifting frame 511 slides in cooperation with the wave groove of the guide plate 518.

[0050] When the flushing drive assembly 52 is activated, driving the lifting frame 511 to move, the lifting frame 511 engages with the rack 516 on one hand, and its slider or roller 519 slides along the wave groove of the guide plate 518 on the other. The specific trajectory of the wave groove will drive the lifting frame 511 to move vertically while generating a periodic, slight horizontal movement towards and away from the mesh filter plate 21. At the same time, the rack 516, which engages with the lifting frame 511, can make a slight adaptive float under the action of the elastic buffer assembly.

[0051] Under this combined motion, the reverse ratchet 514 and the forward ratchet 515 continue to operate normally, converting the reciprocating motion of the lifting frame 511 into the inward rotation of the first guide roller 5121 and the second guide roller 5122. The rotation of the first guide roller 5121 and the second guide roller 5122 drives the blades 5123 to guide the backwash water flow, while the combined motion of the lifting frame 511 itself causes this water flow to not only penetrate the filter plate vertically, but also adds a "scraping" or "disturbance" effect on the surface of the filter plate. The elastically buffered rack 516 ensures that even when the combined motion causes changes in the transmission clearance, the meshing of the gear and the rack 516 remains smooth, avoiding jamming.

[0052] like Figure 6 and Figure 7 As shown, a roller 519 is provided at the contact position between the lifting frame 511 and the guide plate 518, and the roller 519 and the guide plate 518 are in rolling cooperation.

[0053] To minimize motion friction and wear, the lifting frame 511 is equipped with a roller 519 at the contact position with the wave groove of the guide plate 518. The roller 519 forms a rolling engagement with the wave groove, transforming the original sliding friction into rolling friction.

[0054] like Figure 4 and Figure 5 As shown, the flushing drive assembly 52 includes: a drive frame 521, which is vertically disposed on the back side of the mesh filter plate 21; a lifting frame 511, which is slidably disposed at the bottom of the drive frame 521 along the thickness direction of the mesh filter plate 21; and a linear push rod 522, which is vertically disposed at the top of the circulating water tank 2, and the output rod of the linear push rod 522 is connected to the drive frame 521.

[0055] When the cleaning process is initiated, the linear push rod 522 begins operation, its output rod pushing or pulling the drive frame 521 to move smoothly vertically. The lifting frame 511, fixed to the bottom of the drive frame 521, moves vertically in sync. During this process, the rollers 519 on the lifting frame 511 are constrained by the wave groove trajectory of the guide plate 518, causing the lifting frame 511 to generate a periodic horizontal reciprocating motion, approaching and moving away from the filter plate, while moving vertically. Simultaneously, the rack 516, linked to the lifting frame 511, undergoes slight adaptive floating under the action of the elastic buffer assembly, ensuring smooth engagement with the ratchet mechanism.

[0056] like Figure 7 As shown, the mesh filter plate 21 is provided with a through hole with a first stepped groove; the elastic buffer assembly also includes: a sliding rod 5171, which is fixedly mounted on the rack 516 and slides through the through hole, and the sliding rod 5171 is provided with a second stepped groove; and an elastic buffer element 5172, which is sleeved on the sliding rod 5171 and located between the first stepped groove and the second stepped groove.

[0057] When the flushing drive assembly 52 drives the drive frame 521 and the lifting frame 511 to move via the linear push rod 522, and the lifting frame 511 generates a compound motion under the guidance of the wave groove and drives the ratchet mechanism, the rack 516 will be subjected to periodic meshing force. At this time, the sliding rod 5171 fixed to the rack 516 can slide axially within the through hole of the filter plate. The elastic buffer element 5172 sleeved on the sliding rod 5171 is compressed or released between the first stepped groove and the second stepped groove as the force on the rack 516 changes, continuously providing the rack 516 with a rebound force, thereby effectively absorbing and buffering the impact and vibration generated during the transmission process, and ensuring that the lifting frame 511 always slides in cooperation with the wave groove of the guide plate 518.

[0058] like Figure 1 and Figure 11 As shown, a drain pipe 251 is also provided at the bottom of the clean water chamber 23 of the circulating water tank 2, and a drain valve 252 is provided on the drain pipe 251; an overflow pipe 253 and an inlet pipe 254 are also provided at the top of the clean water chamber 23 of the circulating water tank 2. The overflow pipe 253 is connected to the drain pipe 251, and a float valve 255 is provided at the connection between the inlet pipe 254 and the circulating water tank 2.

[0059] During the operation of the entire exhaust gas treatment and self-cleaning system, the washing liquid will be lost due to evaporation, carryover, or periodic discharge. When the liquid level in the clean water chamber 23 drops to the set position, the float valve 255 at the inlet of the water inlet 254 opens to automatically replenish the water supply until the liquid level recovers, at which point the float valve 255 closes, thus maintaining a stable working liquid level in the system. If the system liquid level rises abnormally due to some reason (such as abnormal backwashing or failure of the inlet valve 256), exceeding the normal operating level, the excess liquid will be diverted to the drain pipe 251 through the overflow pipe 253 at the top, effectively preventing the water tank from overflowing. When system maintenance, cleaning, or replacement of the washing liquid is required, the drain valve 252 on the drain pipe 251 can be opened to orderly drain the liquid in the clean water chamber 23 and even the entire water tank.

[0060] A method for preventing scaling and self-cleaning in an industrial exhaust gas treatment system, comprising the following steps: (The method utilizes a device for preventing scaling and self-cleaning in an industrial exhaust gas treatment system.) Step 1: The liquid in the clean water chamber 23 is pumped into the tail gas tower 6 by the circulation pump 4 for spraying. The washed wastewater is returned to the treatment chamber 22 through the drain pipe 3. Then, the circulation pump 4 is started to pump the treatment liquid in the clean water chamber 23 of the circulating water tank 2 into the spray pipe 1 through the water pumping pipe 7. Finally, it is atomized by the spray head 11 and sprayed into the tail gas tower 6 to wash the tail gas and absorb and dissolve the scale. The sprayed liquid carries impurities down the inner wall of the tail gas tower 6 under the action of gravity and flows back to the treatment chamber 22 of the circulating water tank 2 through the drain pipe 3. Step 2: The wastewater returning to the treatment chamber 22 is filtered by the mesh filter plate 21, and impurities are trapped. The filtered clean water enters the water purification chamber 23 for recycling. That is, when the liquid flowing into the treatment chamber 22 flows through the mesh filter plate 21, the solid particulate impurities contained therein are trapped on the water-facing side of the filter plate. The filtered clean liquid enters the water purification chamber 23, completing the circulation and purification of the liquid and the separation and collection of solid impurities. Step 3: By driving the flushing actuator 51 to move up and down, the liquid is guided to backwash the mesh filter plate 21 to remove attached impurities and restore the filtration capacity. That is, the backwashing cleaning mechanism is activated periodically or as needed. The flushing drive assembly 52 drives the flushing actuator 51 to move vertically. During the movement, the drain port guides the liquid in the treatment chamber 22 to concentrate and pass through the blocked local area on the mesh filter plate 21 at high speed, flushing away the filter residue attached to the back water side and causing it to fall to the bottom of the treatment chamber 22, thus restoring the filtration flux of the mesh filter plate 21.

[0061] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A scale prevention and self-cleaning device for industrial exhaust gas treatment systems, applied to scale prevention treatment of exhaust gas towers, characterized in that, include: The spray pipe is equipped with spray heads that extend into the exhaust gas tower. The circulating water tank has a mesh filter plate installed inside, which divides the inner cavity of the circulating water tank into a treatment chamber and a clean water chamber. The bottom of the inner cavity of the exhaust gas tower is connected to the treatment chamber of the circulating water tank through a drain pipe, and the top of the treatment chamber is equipped with a discharge port. The circulation pump has its inlet connected to the clean water chamber of the circulating water tank via a pumping pipe, and its outlet is connected to the spray pipe. The backwash cleaning mechanism includes a backwash execution component and a backwash drive component. The backwash execution component is vertically disposed on the backwater side of the mesh filter plate. The backwash execution component has a drain port that guides liquid in the treatment chamber of the circulating water tank through the mesh filter plate when it moves vertically. The backwash drive component is disposed at the top of the circulating water tank for driving the backwash execution component to move vertically.

2. The anti-scaling and self-cleaning device for an industrial exhaust gas treatment system according to claim 1, characterized in that, The flushing execution components include: The lifting frame is vertically installed on the back side of the mesh filter plate, and the lifting frame is connected to the flushing drive assembly. The first and second diversion rollers are arranged in parallel rotation in the lifting frame. The first and second diversion rollers are provided with blades distributed along their circumference on their circumferential surfaces. The end of the first diversion roller is provided with a first gear and a reverse ratchet, and the end of the second diversion roller is provided with a second gear and a forward ratchet. The first gear and the second gear mesh. The rack is set vertically on the back side of the mesh filter plate and meshes with the reverse ratchet and the forward ratchet. When the reverse ratchet rotates in the reverse direction, it drives the first guide roller to rotate, and when the forward ratchet rotates in the forward direction, it drives the second guide roller to rotate.

3. The anti-scaling and self-cleaning device for an industrial exhaust gas treatment system according to claim 2, characterized in that, The reverse ratchet includes: The reverse inner ratchet is rotatably connected to the end of the first guide roller, and its inner wall is provided with reverse ratchet grooves distributed along its circumference. The outer circumferential surface of the reverse inner ratchet meshes with the rack for transmission. The reverse drive disk is coaxially rotatably disposed in the reverse inner ratchet and is provided with a first positioning post distributed along its circumference. The end of the first guide roller is coaxially fixedly connected to the reverse drive disk. The reverse pawls are distributed circumferentially on the reverse drive disc and are rotatably connected to the reverse drive disc. The first elastic element has its two ends fixedly connected to the reverse pawl and the first positioning post, respectively, and the reverse pawl elastically abuts against the inner wall of the reverse inner ratchet. When the lifting frame moves downward, the reverse inner ratchet drives the first diversion roller to rotate in the opposite direction.

4. The anti-scaling and self-cleaning device for an industrial exhaust gas treatment system according to claim 3, characterized in that, The forward ratchet includes: The inner ratchet is coaxially rotatably connected to the end of the second guide roller. Its inner wall is provided with positive ratchet grooves distributed along its circumference. The outer circumferential surface of the inner ratchet meshes with the rack for transmission. A forward drive disc is coaxially rotatably disposed in a forward inner ratchet and is provided with a second positioning post distributed along its circumference; the end of the second guide roller is coaxially fixedly connected to the forward drive disc. The forward pawls are distributed circumferentially on the forward drive disc and are rotatably connected to the forward drive disc; The second elastic element has its two ends fixedly connected to the forward pawl and the second positioning post, respectively, and the forward pawl elastically abuts against the inner wall of the forward inner ratchet. When the lifting frame moves upward, the inner ratchet drives the second diversion roller to rotate in the forward direction.

5. A scale prevention and self-cleaning device for an industrial exhaust gas treatment system according to any one of claims 2-4, characterized in that, The rack is slidably disposed on the back side of the mesh filter plate along its thickness direction, and an elastic buffer assembly is provided between the rack and the mesh filter plate; the flushing actuation assembly also includes: The guide plate is set vertically on the back side of the mesh filter plate. The side of the guide plate facing the mesh filter plate has a wave groove, and the lifting frame slides in conjunction with the wave groove of the guide plate.

6. The anti-scaling and self-cleaning device for an industrial exhaust gas treatment system according to claim 5, characterized in that, Rollers are installed at the contact point between the lifting frame and the guide plate, and the rollers and the guide plate roll together.

7. The anti-scaling and self-cleaning device for an industrial exhaust gas treatment system according to claim 5, characterized in that, The flushing drive assembly includes: The drive frame is vertically positioned on the back side of the mesh filter plate, and the lifting frame is slidably positioned at the bottom of the drive frame along the thickness direction of the mesh filter plate. A linear push rod is vertically positioned at the top of the circulating water tank, and its output rod is connected to the drive frame.

8. The anti-scaling and self-cleaning device for an industrial exhaust gas treatment system according to claim 5, characterized in that, The mesh filter plate is provided with through holes with first-step grooves; the elastic buffer assembly also includes: A sliding rod is fixedly mounted on a rack and slides through the through hole; a second stepped groove is provided on the sliding rod. An elastic buffer element is sleeved on the sliding rod and located between the first and second stepped grooves.

9. A scale prevention and self-cleaning device for an industrial exhaust gas treatment system according to any one of claims 1-4, characterized in that, The bottom of the clean water chamber of the circulating water tank is equipped with a drain pipe and a drain valve; the top of the clean water chamber of the circulating water tank is equipped with an overflow pipe and an inlet pipe. The overflow pipe is connected to the drain pipe, and a float valve is installed at the connection between the inlet pipe and the circulating water tank.

10. A method for preventing scaling and self-cleaning in an industrial exhaust gas treatment system, comprising an anti-scaling and self-cleaning device for an industrial exhaust gas treatment system as described in any one of claims 1-4, characterized in that, Includes the following steps: Step 1: The liquid in the water purification chamber is pumped into the tail gas tower for spraying using a circulating pump. The wastewater after washing is returned to the treatment chamber through the drain pipe. Step 2: The wastewater returned to the treatment chamber is filtered through a mesh filter plate, where impurities are trapped, and the filtered clean water enters the water purification chamber for recycling. Step 3: By driving the flushing actuator to move up and down, the liquid is guided to flush the mesh filter plate in the opposite direction, removing attached impurities and restoring the filtration capacity.

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