Alkali washing system with induced demisting

Abstract

The present invention relates to an alkali washing system with induced demisting, comprising an alkali washing tank, wherein an alkali mist purification mechanism is connected to an air exhaust port of the alkali washing tank; the alkali washing tank is provided with an inducer, and the inducer has an air inlet, an air supply port, and an air return port, the air supply port and the air return port both being in communication with the cavity of the alkali washing tank; and a purified-gas outlet pipe of the alkali mist purification mechanism is provided with a branch pipe, the branch pipe being connected to the air inlet. In the alkali washing system provided in the present invention, by providing an inducer, pumping out gas from an alkali washing tank and reinjecting same into the tank can generate a negative pressure around an air return position of the inducer, creating a negative-pressure suction effect on alkali mist in the tank, thereby facilitating the treatment of the alkali mist in the tank, including the reduction in the leakage rate of the alkali mist at potential leakage points of the alkali washing tank, the reduction in the amount of alkali mist in the tank, etc., thus effectively improving the on-site production environment, and enhancing the production safety. In addition, purified gas obtained by means of alkali mist purification is used as an inducer jet medium, which is harmless to the atmosphere in the tank, and can also dilute the atmosphere in the tank, thereby improving the production stability.

Description

Induction demisting alkali cleaning system Technical Field

[0001] The invention belongs to the technical field of strip steel cleaning, and in particular relates to an induction-type demisting alkali washing system. Background Art

[0002] To ensure high strip surface quality, continuous annealing units use alkali solution to remove oil stains from the strip surface. During this process, a large amount of vapor containing alkaline mist is generated in the alkali wash tank and water wash tank. To exhaust this gas and protect the working environment and process equipment within the workshop, an alkaline mist extraction system is often installed. This system typically utilizes water's excellent absorption of alkaline mist to treat production waste gas and achieve standard emissions. However, in actual production, due to the limited location of the tank exhaust vents and inadequate sealing of the squeeze rollers and inspection doors, some alkaline mist still overflows from the tank into and out of the workshop, seriously affecting the air quality within the workshop.

[0003] Summary of the Invention

[0004] The present invention relates to an induction demisting alkali washing system, which can at least solve some defects of the prior art.

[0005] The present invention relates to an induced demisting alkali washing system, comprising an alkali washing tank, the air outlet of the alkali washing tank being connected to an alkali mist purification mechanism, the alkali washing tank being provided with an inducer, the inducer having an air inlet, an air supply port and an air return port, the air supply port and the air return port being both connected to the tank cavity of the alkali washing tank, the purified air outlet pipe of the alkali mist purification mechanism being provided with a branch pipe, the branch pipe being connected to the air inlet.

[0006] As one of the implementation methods, the return air position on the alkali washing tank is located near the leakage-prone point of the alkali washing tank.

[0007] As one of the implementation modes, the air supply jet outputted from the air supply port is directed toward the exhaust area, so as to guide the alkaline mist in the tank toward the exhaust port.

[0008] As one of the implementation modes, the air jet outputted from the air supply port is directed toward a leakage-prone point of the alkali washing tank, so as to drive the alkali mist in the tank away from the leakage-prone point.

[0009] As one of the implementation modes, an adsorbent layer is provided in the return air duct of the inducer.

[0010] As one of the implementation modes, the adsorbent layer is made of modified honeycomb activated carbon that has been impregnated with chemical reagents.

[0011] As one of the embodiments, a demisting layer is provided in the air supply passage of the inducer.

[0012] As one of the implementation modes, the demisting layer is provided with a demisting baffle.

[0013] As one of the implementation modes, the alkali mist purification mechanism includes an alkali mist collection pipe, a washing tower and a centrifugal fan arranged on the alkali mist collection pipe, and the branch pipe side connection point is located downstream of the centrifugal fan.

[0014] As one of the implementation modes, a dryer is provided on the branch pipe.

[0015] The present invention has at least the following beneficial effects:

[0016] The alkali cleaning system provided by the present invention utilizes an inductor to extract gas from the alkali cleaning tank and then re-introduce it into the tank. This generates negative pressure around the return air position of the inductor, creating a negative pressure suction effect on the alkali mist within the tank. This facilitates the disposal of the alkali mist within the tank, including reducing alkali mist leakage from leaky points in the alkali cleaning tank and reducing the amount of alkali mist within the tank, thereby effectively improving the on-site production environment and enhancing production safety. Furthermore, the use of purified gas obtained from alkali mist purification as the jet medium of the inductor is not only harmless to the atmosphere within the tank but also dilutes the atmosphere within the tank, thereby facilitating production stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] FIG1 is a schematic structural diagram of an alkali washing system provided in Example 1 of the present invention;

[0019] FIG2 is a schematic structural diagram of an inducer provided in Example 1 of the present invention;

[0020] FIG3 is a schematic structural diagram of an iron sludge processing subsystem provided in Embodiment 2 of the present invention;

[0021] FIG4 is a top view of FIG3;

[0022] FIG5 is a schematic structural diagram of an iron sludge collection box provided in a second embodiment of the present invention;

[0023] FIG6 is a schematic side view of the structure of an electromagnetic filter provided in Example 3 of the present invention;

[0024] FIG7 is a schematic diagram of a top view of the electromagnetic filter provided in Example 3 of the present invention;

[0025] FIG8 is a schematic diagram of the main structure of the electromagnetic filter provided in the third embodiment of the present invention. DETAILED DESCRIPTION

[0026] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0027] Example 1

[0028] As shown in Figures 1 and 2, an embodiment of the present invention provides an alkali washing system with induction demisting, comprising an alkali washing tank 1, wherein the exhaust port of the alkali washing tank 1 is connected to an alkali mist purification mechanism 2, and the alkali washing tank 1 is provided with an inducer 3, wherein the inducer 3 has an air inlet, an air supply port and an air return port, wherein the air supply port and the air return port are both connected to the tank cavity of the alkali washing tank 1, and a branch pipe 31 is provided on the purified air outlet pipe 22 of the alkali mist purification mechanism 2, and the branch pipe 31 is connected to the air inlet.

[0029] Preferably, the inductor 3 is arranged near a leak-prone point in the alkali washing tank 1, that is, the return air position on the alkali washing tank 1 is located near a leak-prone point in the alkali washing tank 1, for example, it is arranged at a squeeze roller, an access door, etc. Multiple inductors 3 may be arranged, for example, an inductor 3 is arranged near each leak-prone point; in addition, an inductor 3 may also be arranged in a well-sealed area.

[0030] In one embodiment, as shown in Figure 1 , the alkali mist purification mechanism 2 includes an alkali mist collection pipe, a scrubber 21, and a centrifugal fan disposed therein. The purified gas outlet pipe 22 is connected to the centrifugal fan, and the branch pipe 31 has a side connection downstream of the centrifugal fan. Flow control valves are provided on the branch pipe 31 and the purified gas outlet pipe 22, respectively, to control the flow rates of the two purified gas streams, thereby ensuring the required gas volume for reliable operation of the induction device 3.

[0031] In one embodiment, the washing tower 21 is a horizontal washing tower 21, which is provided with a spray pipe, a packing layer and a demisting layer 35. A plurality of nozzles are provided on the spray pipe, and the angle of the spray pipe is adjustable. The packing layer is a randomly piled ball ring or other packing balls; the spray pipe is connected to a circulation pump.

[0032] The alkali cleaning system provided in this embodiment, by providing an inductor 3 to extract the gas from the alkali cleaning tank 1 and then re-introduce it into the tank, can generate a negative pressure around the return air position of the inductor 3, thereby forming a negative pressure suction effect on the alkali mist in the tank, which is beneficial to the disposal of the alkali mist in the tank, including reducing the amount of alkali mist leakage from the leak-prone points of the alkali cleaning tank 1 and reducing the amount of alkali mist in the tank, thereby effectively improving the on-site production environment and enhancing production safety. In addition, the purified gas obtained by purifying the alkali mist is used as the jet medium of the inductor 3, which is not only harmless to the atmosphere in the tank, but also can dilute the atmosphere in the tank, thereby facilitating production stability.

[0033] In one of the embodiments, the air jet output from the air supply port is directed toward the exhaust area, and is used to guide the alkali mist in the tank toward the exhaust port. This method can, on the one hand, utilize the air jet to drive the alkali mist toward the exhaust port, which is beneficial to the discharge of the alkali mist and can save the energy consumption required for the extraction of the alkali mist. On the other hand, the air jet has an inducing effect on the alkali mist around it, which can make the irregularly flowing alkali mist in the tank flow in a certain direction, guide the alkali mist to the exhaust port, and reduce the escape of alkali mist.

[0034] Among them, preferably, the air supply port should be staggered with the air exhaust port to avoid air flow short circuit.

[0035] In another embodiment, the air jet output from the air outlet is directed toward a leak-prone point in the alkali cleaning tank 1 to drive the alkali mist within the tank away from the leak-prone point. This approach can further reduce the leakage of alkali mist. For example, the air jet can be directed toward the squeeze roller / access door to create an air curtain seal, thereby improving the sealing performance of the alkali cleaning tank 1.

[0036] In one embodiment, as shown in FIG2 , an adsorbent layer 34 is provided in the return air channel 32 of the inducer 3 , and the alkaline mist in the return air can be absorbed by the adsorbent layer 34 ; the adsorbent layer 34 includes but is not limited to modified honeycomb activated carbon impregnated with chemical reagents, which can efficiently absorb the alkaline mist.

[0037] Among them, there can be multiple return air ports / return air channels 32 in the inducer 3, which can increase the processing capacity.

[0038] In one embodiment, as shown in FIG2 , a demisting layer 35 is provided in the air supply channel 33 of the inductor 3 to further remove alkaline mist and moisture from the air flow. The relatively dry air jet also improves its performance within the alkaline cleaning tank 1 , including jet kinetic energy and sealing performance against leak-prone points. Preferably, the demisting layer 35 is provided with demisting baffles; of course, the demisting layer 35 may also be formed of an adsorbent.

[0039] In the case where the alkali mist purification mechanism 2 includes a washing tower 21, preferably, a dryer is provided on the branch pipe 31, which can also correspondingly improve the dryness of the air jet.

[0040] In one embodiment, as shown in Figure 2 , the induction device 3 includes a plenum box 36 and an induction box 37. The branch pipe 31 is connected to the plenum box 36. An air inlet nozzle is provided at the outlet of the plenum box 36, facing into the induction box 37 and injecting a jet of air into the induction box 37 to create a negative pressure. Both a return air inlet and a supply air inlet are provided on the induction box 37. An air supply nozzle is provided at the outlet of the induction box 37, facing into the alkali cleaning tank 1 and injecting a jet of air into the alkali cleaning tank 1.

[0041] Among them, preferably, the spray angle of the air supply nozzle is adjustable, which can improve process flexibility.

[0042] Example 2

[0043] This embodiment optimizes the above-mentioned embodiment 1.

[0044] Specifically, the above-mentioned alkali washing tank 1 is equipped with an alkali washing tank 200, which can realize the recycling of alkali solution; wherein, the alkali washing tank 200 is equipped with an iron sludge processing subsystem, which is used to clean the iron sludge impurities in the alkali washing tank 200 online, which can improve the operating stability and reliability of the alkali washing system and reduce the downtime and frequency of silt removal.

[0045] As shown in Figures 3 and 4, the iron sludge processing subsystem includes an intermediate medium circulation mechanism and an iron sludge recovery mechanism. The intermediate medium circulation mechanism includes a number of intermediate media 330 capable of extracting iron sludge from the bottom of the alkali washing tank 200, and a medium conveying unit 331, a medium transfer unit 332 and a medium reflux unit 333 connected in sequence. The medium conveying unit 331 is connected to the intermediate medium outlet of the alkali washing tank 200, and the medium reflux unit 333 is connected to the intermediate medium inlet of the alkali washing tank 200; the iron sludge recovery mechanism includes a flushing unit arranged above the medium transfer unit 332 and an iron sludge collection box 321 arranged below the medium transfer unit 332.

[0046] In one embodiment, the intermediate medium 330 includes steel balls for entraining iron sludge, which can conveniently carry the iron sludge out of the bottom of the alkali cleaning tank 200. The iron sludge at the bottom of the alkali cleaning tank 200 is entrained by the cascading flow of steel balls and carried out of the alkali cleaning tank 200 via the medium conveying unit 331. The surface roughness of the steel balls is designed to enhance the iron sludge entrainment effect. In one embodiment, the surface roughness of the steel balls is Ra ≥ 0.8 μm, and more preferably, Ra ≤ 12 μm.

[0047] In one embodiment, as shown in FIG3 , a slope is provided at the bottom of the alkali washing tank 200 , and the slope slopes from the intermediate medium inlet to the intermediate medium outlet, so as to facilitate the circulation of the intermediate medium 330 in the alkali washing tank 200 . For example, the medium steel balls can rely on gravity to run from the intermediate medium inlet to the intermediate medium outlet, and the medium steel balls at a high position exert an extrusion and driving effect on the medium steel balls at a low position and the iron mud on the slope. Based on the circulation of the medium steel balls, the bottom of the alkali washing tank 200 is ensured to be in motion at all times, which can reduce the accumulation of iron mud and thus save the intervention of power equipment. At the same time, the design of the slope is also conducive to the deposition of iron mud at the intermediate medium outlet, thereby facilitating the intermediate medium 330 to bring the iron mud out.

[0048] In one embodiment, the medium conveying unit 331 adopts a screw pump or a screw conveyor. According to the relative position relationship between the intermediate medium outlet and the medium transfer unit 332, the screw pump or the screw conveyor can be arranged tilted or horizontally.

[0049] In one embodiment, as shown in FIG3 and FIG4 , the medium transfer unit 332 is a chain conveying unit, such as a chain plate conveyor or a drag chain conveyor. Accordingly, the medium transfer unit 332 includes an upper chain layer 3321 and a lower chain layer 3322 .

[0050] The gap between the chain plates of the chain conveying unit is smaller than the size of the intermediate medium 330 , for example, smaller than the diameter of the medium steel ball.

[0051] Among them, the medium conveying unit 331 is connected with the upper chain layer 3321. For example, the medium output port of the medium conveying unit 331 is located directly above the upper chain layer 3321, and the intermediate medium 330 can be conveyed to the upper chain layer 3321; optionally, a hopper is arranged above the upper chain layer 3321, and the intermediate medium 330 output by the medium conveying unit 331 is received by the hopper and transferred to the upper chain layer 3321, which can avoid the intermediate medium 330 from popping out of the upper chain layer 3321 due to excessive falling distance.

[0052] The medium return unit 333 is arranged at the outlet side of the chain conveyor unit. Optionally, the medium return unit 333 adopts a conveyor roller to transport the cleaned intermediate medium 330 back to the alkali washing tank 200.

[0053] The flushing unit is used to flush the intermediate medium 330 on the medium transfer unit 332, thereby separating the iron sludge from the intermediate medium 330. In one embodiment, as shown in FIG4 , the flushing unit includes a flushing pipe 351 , at least one set of spray structures may be arranged at the bottom of the flushing pipe 351 . When there are multiple sets of spray structures, the spray structures are arranged sequentially along the conveying direction of the intermediate medium 330 . Each set of spray structures includes at least one nozzle. When there are multiple nozzles in the spray structure, the nozzles in the spray structures are preferably arranged sequentially along the width direction of the medium transfer unit 332 .

[0054] 4 , the flushing unit further includes a flushing liquid supply pipe 352 connected to the flushing pipe 351 for supplying flushing liquid. Preferably, surface water from the caustic cleaning tank 200 is used as the flushing liquid. Accordingly, the flushing liquid supply pipe 352 is connected to the upper portion of the caustic cleaning tank 200.

[0055] The flushing liquid can exit through both sides of the medium transfer unit 332, and / or the medium transfer unit 332 is a hollow conveying device, for example, it can exit through the gap between the chain plates of the chain conveyor unit. In one embodiment, as shown in Figures 3 and 5, the iron sludge recovery mechanism also includes a drainage unit 322, which is arranged between the upper chain layer 3321 and the lower chain layer 3322 of the medium transfer unit 332. The top inlet of the drainage unit 322 is located directly below the flushing unit, and the bottom outlet of the drainage unit 322 is located directly above the iron sludge collection box 321. Based on this design, the flushing liquid can be reliably drained into the iron sludge collection box 321, making the on-site environment cleaner. At the same time, it prevents flushing water carrying iron sludge from contaminating the lower chain layer 3322, thereby improving the working reliability of the medium transfer unit 332 and reducing its maintenance frequency.

[0056] Preferably, as shown in Figures 3 and 5, the drainage unit 322 is in an inverted Y-shaped structure, forming one drainage inlet pipe and two drainage outlet pipes; the two drainage outlet pipes can ensure the drainage efficiency and effect of the flushing fluid on the one hand, and on the other hand, it is also convenient for the arrangement of the lower chain layer 3322, for example, the lower chain layer 3322 is located between the two drainage outlet pipes.

[0057] The upper chain layer 3321 may be arranged in the drainage inlet pipe, so as to better capture the intermediate medium 330 and iron mud splashed by the high-pressure jet.

[0058] Preferably, as shown in Figure 5, the above-mentioned drainage unit 322 is connected to the iron mud collection box 321 to form an integrated structure. For example, for the above-mentioned inverted Y-shaped drainage unit 322, its outer frame 3221 is integrally formed with the iron mud collection box 321 to form a top-closed box body, and an inverted V-shaped mudguard 3222 is arranged in the box body, which correspondingly constitutes the inner frame of the drainage unit 322.

[0059] In one embodiment, a protective net 323 is further arranged around the upper chain layer 3321 of the medium transfer unit 332. The protective area of ​​the protective net 323 at least covers the flushing area of ​​the upper chain layer 3321. The provision of the protective net 323 can prevent the high-pressure jet from spraying the intermediate medium 330 out of the medium transfer unit 332.

[0060] Among them, the protective net 323 can provide side protection. Optionally, the protective net 323 includes two side mesh panels 3231, and the two side mesh panels 3231 are arranged on both sides of the conveying channel of the medium transfer unit 332; the side mesh panels 3231 preferably do not move together with the medium transfer unit 332, for example, they are installed through mesh panel brackets. For the above-mentioned solution with a drainage unit 322, the side mesh panels 3231 can also be installed on the outer frame 3221 of the drainage unit 322.

[0061] And / or, the protective net 323 can provide upper protection. Optionally, the protective net 323 includes a top mesh panel 3232, which is installed above the medium transfer unit 332; the top mesh panel 3232 preferably does not move with the medium transfer unit 332, and its installation method can refer to the installation method of the side mesh panel 3231.

[0062] The iron sludge processing subsystem is further optimized. As shown in FIG3 and FIG4 , the iron sludge recovery mechanism further includes a filtering unit, and the iron sludge collection box 321 is provided with a flushing liquid recovery pipe connected to the filtering unit.

[0063] Optionally, the filtrate produced by the filtration unit can be reused as a rinse liquid. For example, the filtrate outlet pipe of the filtration unit is connected to a rinse liquid storage tank, and the rinse liquid supply pipe 352 is also connected to the rinse liquid storage tank. When the rinse liquid is surface water from the alkaline washing tank 200, the filtrate produced by the filtration unit can be returned to the alkaline washing tank 200. Accordingly, the filtrate outlet pipe of the filtration unit is connected to the alkaline washing tank 200.

[0064] The iron sludge collection box 321 can control the direction of the flushing liquid by overflowing, and the flushing liquid recovery pipe is connected to the overflow level of the iron sludge collection box 321. Heavier impurities are deposited at the bottom of the iron sludge collection box 321 and can be cleaned regularly or irregularly.

[0065] In one embodiment, the filtering unit includes an electromagnetic filter 100 for removing ferromagnetic impurities in the flushing liquid, which can reliably adsorb and remove the ferromagnetic impurities suspended in the flushing liquid.

[0066] Example 3

[0067] This embodiment provides an electromagnetic filter 100 , which can be used in the above-mentioned second embodiment.

[0068] As shown in Figures 6 to 8, the electromagnetic filter 100 includes a filter tank 101, a filter disc 102 and an impurity collector 103. The filter disc 102 includes an annular bracket 1021, multiple electromagnetic suction cups 1022 and an electronic control unit for controlling the power supply and loss of each electromagnetic suction cup 1022. Each electromagnetic suction cup 1022 is installed on the annular bracket 1021 and is distributed in an annular shape along the circumference of the annular bracket 1021. The annular bracket 1021 is equipped with a rotating drive mechanism 105 for driving the rotation thereof; the annular bracket 1021 is partially located in the filter tank 101, and the impurity collector 103 is arranged outside the filter tank 101 and includes an impurity removal portion for driving impurities away from the electromagnetic suction cup 1022.

[0069] In one embodiment, the above-mentioned annular bracket 1021 includes an inner ring frame and an outer ring frame, and the inner ring frame and the outer ring frame are connected by a plurality of spokes. Each spoke divides the annular area between the inner ring frame and the outer ring frame into a plurality of suction cup mounting positions, and each suction cup mounting position is installed with an electromagnetic suction cup 1022.

[0070] Optionally, as shown in FIG6 , the spokes are distributed along the radial direction of the annular support 1021 , and the inner ring frame-spoke-outer ring frame are connected to form a hub shape.

[0071] The electromagnetic suction cup 1022 is preferably detachably mounted on the annular bracket 1021 , including but not limited to being fixed with screws.

[0072] The disk surface of the electromagnetic suction cup 1022 is preferably coplanar with the corresponding side surface of the annular bracket 1021. This not only facilitates the removal of impurities on the electromagnetic suction cup 1022, but also prevents the formation of some corners between the electromagnetic suction cup 1022 and the annular bracket 1021, which may cause dirt to accumulate.

[0073] Preferably, the annular bracket 1021 is connected to the rotation drive mechanism 105 via the bracket shaft 104 , and the rotation drive mechanism 105 drives the bracket shaft 104 to rotate, thereby driving the annular bracket 1021 and the electromagnetic suction cup 1022 on the annular bracket 1021 to rotate.

[0074] In one embodiment, the above-mentioned rotation drive mechanism 105 adopts a motor + transmission component structure, and the transmission component can be a sprocket drive, a pulley drive, etc.; the motor is preferably a variable frequency motor, which can control the rotation speed of the annular bracket 1021.

[0075] Preferably, the electric control unit includes a plurality of electric control cables and an electric control module. The number of the electric control cables is the same as the number of the electromagnetic suction cups 1022 and they are connected one-to-one. Each of the electric control cables is electrically connected to the electric control module.

[0076] In one embodiment, the support shaft 104 is a hollow shaft, and each of the electrical cables is routed through the hollow cavity of the support shaft 104. This approach facilitates the routing of the electrical cables and provides high safety and reliability. Preferably, a wiring hole is provided in the annular support 1021 (e.g., an inner ring frame) to facilitate the entry of the electrical cables into the support shaft 104; a wiring channel is also provided in the electromagnetic chuck 1022 to connect the electrical cables to the coil within the electromagnetic chuck 1022.

[0077] Preferably, the annular bracket 1021 is detachably mounted on the bracket shaft 104. In one embodiment, the bracket shaft 104 is designed in sections, with the annular bracket 1021 clamped between two shaft segments 1041 of the bracket shaft 104 (generally, the inner ring bracket is clamped between the two shaft segments 1041 of the bracket shaft 104); optionally, a shaft shoulder is machined on the shaft segment 1041, and both ends of the inner hole of the inner ring bracket adopt a stepped hole structure. The shaft neck portion of the shaft segment 1041 is inserted into the large-diameter hole segment of the corresponding side stepped hole structure, and the shaft shoulder of the shaft segment 1041 abuts against the corresponding side end face of the inner ring bracket, and the two are fixed by screws.

[0078] Furthermore, when the rotating shaft segment 1041 and the inner ring frame are assembled, the electromagnetic suction cup 1022 can be further clamped between the two. For example, the outer ring wall of the inner ring frame adopts a stepped shaft structure, and a clamping groove is formed between the shaft shoulder of one rotating shaft segment 1041 and the large diameter wall of the stepped shaft outer ring wall. The corresponding side end of the electromagnetic suction cup 1022 is clamped in the clamping groove. This method can improve the stability and reliability of the installation of the electromagnetic suction cup 1022. In particular, when the electric control cable needs to enter the electromagnetic suction cup 1022 through the bracket rotating shaft 104, the above structure can ensure the alignment accuracy between the wiring hole on the annular bracket 1021 and the wiring channel in the electromagnetic suction cup 1022, thereby avoiding damage to the electric control cable and other faults.

[0079] In one embodiment, the electronic control module includes a central controller and conductive slip rings. Each of the electronic control cables is connected to the rotor portion of the conductive slip rings, and the central controller is connected to the stator portion of the conductive slip rings. The rotor portion of the conductive slip rings is preferably mounted on the bracket shaft 104. This structure ensures reliable control of the power supply and loss of each electromagnetic chuck 1022 while the electromagnetic chuck 1022 rotates normally.

[0080] The above-mentioned central controller includes but is not limited to a PLC controller.

[0081] When the annular bracket 1021 drives each electromagnetic suction cup 1022 to rotate, some electromagnetic suction cups 1022 are immersed in the filter tank 101 from outside the filter tank 101, and some electromagnetic suction cups 1022 leave the filter tank 101 and swing upward; for the electromagnetic suction cups 1022 that swing upward, ferromagnetic impurities are adsorbed on their surfaces, and the liquid that is carried up and the liquid in the adsorbed impurities can leave the electromagnetic suction cups 1022 under the action of gravity, so that the effect of gravity dehydration can be achieved. The impurities collected in the impurity collector 103 have a low water content, which not only facilitates the subsequent treatment of the impurities, but also reduces the loss of liquid in the filter tank 101.

[0082] In one embodiment, as shown in Figures 7 and 8, the filter disc 102 further includes a water retaining ring 1023, which is coaxially mounted on the support shaft 104 and abuts against the surface of each electromagnetic suction cup 1022. An annular water retaining edge is protruded from the outer ring wall of the water retaining ring 1023, and the annular water retaining edge and the electromagnetic suction cup 1022 form a water retaining groove. The provision of the water retaining ring 1023 can effectively guide the liquid, preventing it from entering places such as the support shaft 104 and affecting the normal operation of the electronic control unit.

[0083] Preferably, there are two water retaining rings 1023 and they are arranged on both sides of the annular bracket 1021.

[0084] Preferably, a sealing gasket can be sandwiched between the water retaining ring 1023 and the electromagnetic suction cup 1022 to improve the water retaining effect.

[0085] At the impurity collection station, impurities on the surface of the electromagnetic chuck 1022 may be scraped off, or the surface of the electromagnetic chuck 1022 may be flushed with high-pressure water or high-pressure gas.

[0086] In one embodiment, as shown in Figures 6-8 , the impurity removal unit includes a scraper 1031, the working end of which contacts the surface of the electromagnetic chuck 1022 in the impurity collection position; the impurity collector 103 also includes an impurity collection trough 1032, which is connected to the bottom of the scraper 1031. This method has low energy consumption and high working reliability.

[0087] Generally, both sides of the electromagnetic suction cup 1022 can absorb impurities. Therefore, it is preferred to set a scraper 1031 and an impurity collection groove 1032 on both sides of the annular bracket 1021 respectively; the distance between the working ends of the scrapers 1031 on both sides is preferably the same as the thickness of the electromagnetic suction cup 1022.

[0088] Preferably, as shown in FIG. 7 and FIG. 8 , the scraper blade 1031 is arranged at an angle to facilitate the scraped impurities to fall into the impurity collecting trough 1032 .

[0089] Optionally, the working end of the scraper 1031 is its top end, and the working end is preferably parallel to the horizontal plane, that is, the contact line between the scraper 1031 and the electromagnetic suction cup 1022 is parallel to the horizontal plane. This method can facilitate the arrangement of the scraper 1031, the impurity collection trough 1032, etc. and facilitate the collection of impurities.

[0090] Preferably, the scraper 1031 adopts a grooved plate, and the length direction of the scraper 1031 is defined as the direction from its working end to the impurity collection groove 1032. Wing plates are extended from the two lateral ends of the scraper 1031 to better restrain and guide the scraped impurities.

[0091] As a preferred solution of this embodiment, as shown in Figures 7 and 8, there are multiple groups of filter discs 102, and each of the annular brackets 1021 is sequentially mounted on the same bracket shaft 104, and the bracket shaft 104 is connected to the rotation drive mechanism 105. Providing multiple groups of filter discs 102 can improve filtration efficiency and filtration effect.

[0092] As shown in FIG. 7 , two adjacent filter discs 102 may share a common impurity collection slot 1032 .

[0093] Preferably, as shown in FIG7 , a plurality of partitions are provided in the filter tank 101 , each partition dividing the filter tank 101 into a plurality of liquid storage tanks 1011 , preferably each liquid storage tank 1011 is respectively provided with a filter disc 102 ; wherein, the number of filter discs 102 and liquid storage tanks 1011 is preferably the same and they are arranged in one-to-one correspondence.

[0094] In one embodiment, upstream sewage can be allowed to enter each liquid storage tank 1011 at the same time.

[0095] In another embodiment, the various liquid storage tanks 1011 can be connected in series, with upstream sewage first entering the first liquid storage tank 1011. The sewage then overflows between the upstream and downstream liquid storage tanks 1011. This allows for streamlined sewage treatment, enabling continuous processing and ensuring treatment effectiveness and efficiency. As shown in Figure 7, in the first liquid storage tank 1011, the filter disc 102 is preferably positioned near the sewage inlet to immediately capture ferromagnetic impurities in the sewage and improve electromagnetic filtration effectiveness. In the tail liquid storage tank 1011, the filter disc 102 is preferably positioned near the filtrate outlet to improve the cleanliness of the discharged filtrate.

[0096] In particular, based on the segmented design of the bracket shaft 104 mentioned above, the installation and arrangement of each filter disc 102 can be facilitated; the number of filter discs 102 can be increased or decreased as needed, so the flexibility is very high; and it can facilitate equipment maintenance, for example, the filter disc 102 at the corresponding liquid storage tank 1011 can be disassembled and assembled without affecting the filtration process in other liquid storage tanks 1011.

[0097] The method of using the electromagnetic filter 100 includes:

[0098] The electromagnetic chucks 1022 are driven to rotate by the annular bracket 1021, so that the electromagnetic chucks 1022 can move cyclically between the working position, the dehydration position and the impurity removal position.

[0099] In the working position, the electromagnetic chuck 1022 is energized and at least partially immersed in the filter tank 101 to absorb ferromagnetic impurities in the filter tank 101;

[0100] In the dehydration position, the electromagnetic chuck 1022 remains energized;

[0101] In the impurity removal position, the electromagnetic chuck 1022 loses power, and the impurities are driven away from the electromagnetic chuck 1022 by the impurity removal unit and collected.

[0102] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An induction demisting alkali washing system, comprising an alkali washing tank, the exhaust port of which is connected to an alkali mist purification mechanism, characterized in that: The alkali washing tank is provided with an inducer, which has an air inlet, an air supply port and an air return port. The air supply port and the air return port are both connected to the tank cavity of the alkali washing tank. The purified air outlet pipe of the alkali mist purification mechanism is provided with a branch pipe, and the branch pipe is connected to the air inlet.

2. The inductive demisting alkali cleaning system according to claim 1, characterized in that: The return air position on the alkali cleaning tank is located near the leakage point of the alkali cleaning tank.

3. The inductive demisting alkali cleaning system according to claim 1, characterized in that: The air supply jet outputted from the air supply port is directed toward the exhaust area, and is used to guide the alkali mist in the tank toward the exhaust port.

4. The inductive demisting alkali cleaning system according to claim 1, characterized in that: The air supply jet outputted from the air supply port is directed toward the leakage-prone point of the alkali washing tank, so as to drive the alkali mist in the tank away from the leakage-prone point.

5. The induction demisting alkali cleaning system according to claim 1, characterized in that: An adsorbent layer is arranged in the return air passage of the inductor.

6. The induction demisting alkali cleaning system according to claim 5, characterized in that: The adsorbent layer is made of modified honeycomb activated carbon that has been impregnated with chemical reagents.

7. The inductive demisting alkali cleaning system according to claim 1, characterized in that: A demisting layer is provided in the air supply passage of the inductor.

8. The induction demisting alkali cleaning system according to claim 7, characterized in that: The demisting layer is arranged with demisting baffles.

9. The inductive demisting alkali cleaning system according to claim 1, characterized in that: The alkali mist purification mechanism comprises an alkali mist collection pipeline, a washing tower and a centrifugal fan arranged on the alkali mist collection pipeline, and the branch pipe side connection point is located downstream of the centrifugal fan.

10. The induction demisting alkali cleaning system according to claim 9, characterized in that: The branch pipe is provided with a dryer.

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