Induced demisting caustic scrubbing system

Abstract

The present application relates to a kind of induced demisting alkali washing system, including alkali washing tank, the air outlet of alkali washing tank is connected with alkali mist purification mechanism, and inducer is equipped on alkali washing tank, inducer has air inlet, air outlet and return air inlet, air outlet and return air inlet are all communicated with the tank cavity of alkali washing tank, branch pipe is equipped on the purification gas outlet pipe of alkali mist purification mechanism, and branch pipe is connected with air inlet.The alkali washing system provided by the present application, by setting inducer, the gas in alkali washing tank is extracted and then sent into tank, can generate negative pressure around the return air position of inducer, forms negative pressure suction effect to alkali mist in tank, is favorable to the disposal of alkali mist in tank, including reducing the alkali mist leakage amount of alkali washing tank vulnerable point, reducing alkali mist amount in tank etc., effectively improve the on-site production environment, improve production safety.In addition, the purified gas obtained by alkali mist purification is used as the jet medium of inducer, not only harmless to the atmosphere in tank, but also can dilute the atmosphere in tank, conducive to the stability of production.

Description

Technical Field

[0001] This invention belongs to the field of strip steel cleaning technology, specifically relating to an induced demisting alkaline washing system. Background Technology

[0002] To ensure high strip quality, continuous annealing units use alkaline solutions to remove oil stains from the strip surface. During this process, a large amount of alkaline mist vapor is generated in the alkaline washing tank and water washing tank. To remove this gas and protect the working environment and process equipment in the workshop, an alkaline mist extraction system is usually installed. This system typically utilizes the excellent absorption properties of water for alkaline mist to treat the waste gas from production and achieve the goal of meeting emission standards. However, in actual production, due to the limited placement of the exhaust vents in the tanks and inadequate sealing at the squeeze rollers and inspection doors, some alkaline mist still overflows from the tanks and enters and exits the workshop, seriously affecting the air quality inside the workshop. Summary of the Invention

[0003] This invention relates to an induced demisting alkaline washing system, which can at least solve some of the defects of the prior art.

[0004] This invention relates to an induced demisting alkaline washing system, comprising an alkaline washing tank, an alkaline mist purification mechanism connected to the exhaust port of the alkaline washing tank, an inducer provided on the alkaline washing tank, the inducer having an air inlet, an air supply outlet and an air return outlet, the air supply outlet and the air return outlet both communicating with the tank cavity of the alkaline washing tank, and a branch pipe provided on the purified air outlet pipe of the alkaline mist purification mechanism, the branch pipe being connected to the air inlet.

[0005] As one implementation method, the return air position on the alkaline washing tank is located near the leakage point of the alkaline washing tank.

[0006] As one implementation method, the air jet output from the air outlet is directed toward the exhaust area to guide the alkaline mist in the tank toward the exhaust outlet.

[0007] As one implementation method, the air jet output from the air outlet is directed toward the leak-prone point of the alkaline washing tank, in order to drive the alkaline mist in the tank away from the leak-prone point.

[0008] As one implementation method, an adsorbent layer is provided in the return air channel of the inducer.

[0009] As one embodiment, the adsorbent layer is made of modified honeycomb activated carbon that has been impregnated with chemical reagents.

[0010] As one implementation method, a demisting layer is provided in the air supply channel of the inducer.

[0011] As one implementation method, the demisting layer is provided with demisting baffles.

[0012] As one embodiment, the alkaline mist purification mechanism includes an alkaline mist collection pipe and a scrubbing tower and a centrifugal fan arranged on the alkaline mist collection pipe, with the branch pipe connection point located downstream of the centrifugal fan.

[0013] As one implementation method, a dryer is provided on the branch pipe.

[0014] The present invention has at least the following beneficial effects:

[0015] The alkaline washing system provided by this invention, by setting up an inducer, extracts gas from the alkaline washing tank and then sends it back into the tank. This creates negative pressure around the return air position of the inducer, forming a negative pressure suction effect on the alkaline mist inside the tank. This facilitates the handling of alkaline mist, including reducing the amount of alkaline mist leakage at potential leak points in the alkaline washing tank and reducing the amount of alkaline mist inside the tank, effectively improving the on-site production environment and enhancing production safety. Furthermore, using the purified gas obtained from alkaline mist purification as the jet medium of the inducer is not only harmless to the atmosphere inside the tank but also dilutes the atmosphere, contributing to production stability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the alkaline washing system provided in Embodiment 1 of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the inducer provided in Embodiment 1 of the present invention;

[0019] Figure 3 This is a schematic diagram of the iron sludge treatment subsystem provided in Embodiment 2 of the present invention;

[0020] Figure 4 for Figure 3 Top view;

[0021] Figure 5 This is a schematic diagram of the iron sludge collection box provided in Embodiment 2 of the present invention;

[0022] Figure 6 This is a side view of the electromagnetic filter provided in Embodiment 3 of the present invention;

[0023] Figure 7 This is a top view of the electromagnetic filter provided in Embodiment 3 of the present invention;

[0024] Figure 8This is a front view schematic diagram of the electromagnetic filter provided in Embodiment 3 of the present invention. Detailed Implementation

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example 1

[0027] like Figure 1 and Figure 2 This invention provides an induced demisting alkaline washing system, including an alkaline washing tank 1. The exhaust port of the alkaline washing tank 1 is connected to an alkaline mist purification mechanism 2. An inducer 3 is provided on the alkaline washing tank 1. The inducer 3 has an air inlet, an air supply outlet, and an air return outlet. The air supply outlet and the air return outlet are both connected to the tank cavity of the alkaline washing tank 1. A branch pipe 31 is provided on the purified air outlet pipe 22 of the alkaline mist purification mechanism 2. The branch pipe 31 is connected to the air inlet.

[0028] Preferably, the aforementioned inducer 3 is arranged near the leakage point of the alkaline washing tank 1, that is, the return air position on the alkaline washing tank 1 is located near the leakage point of the alkaline washing tank 1, for example, arranged at the squeeze roller, maintenance door, etc. Multiple inducers 3 can be arranged, for example, inducers 3 can be arranged near each leakage point; in addition, inducers 3 can also be arranged in a well-sealed area.

[0029] In one embodiment, such as Figure 1 The aforementioned alkaline mist purification mechanism 2 includes an alkaline mist collection pipe, a scrubbing tower 21 arranged on the alkaline mist collection pipe, and a centrifugal fan. The purified gas outlet pipe 22 is connected to the centrifugal fan, and the bypass point of the branch pipe 31 is located downstream of the centrifugal fan. Flow regulating valves are respectively installed on the branch pipe 31 and the purified gas outlet pipe 22 to control the flow rate of the two purified gas streams, ensuring the amount of gas required for the reliable operation of the inducer 3.

[0030] 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. The spray pipe is provided with a number of nozzles and the angle of the spray pipe is adjustable. The packing layer is a randomized Pall ring or other packing balls. The spray pipe is connected to a circulating pump.

[0031] The alkaline washing system provided in this embodiment, by setting up an inducer 3, extracts gas from the alkaline washing tank 1 and then sends it back into the tank. This creates negative pressure around the return air position of the inducer 3, forming a negative pressure suction effect on the alkaline mist in the tank. This facilitates the handling of the alkaline mist, including reducing the amount of alkaline mist leakage at easily leaking points in the alkaline washing tank 1 and reducing the amount of alkaline mist in the tank, effectively improving the on-site production environment and enhancing production safety. Furthermore, using the purified gas obtained from alkaline mist purification as the jet medium of the inducer 3 is not only harmless to the atmosphere in the tank but also dilutes the atmosphere, which is beneficial to production stability.

[0032] In one embodiment, the air jet output from the air outlet is directed toward the exhaust area to guide the alkaline mist in the tank toward the exhaust outlet. This method can, on the one hand, use the air jet to drive the alkaline mist toward the exhaust outlet, which is conducive to the discharge of the alkaline mist and can save the energy required for alkaline mist extraction. On the other hand, the alkaline mist around the air jet has an inducing effect, which can make the irregularly flowing alkaline mist in the tank flow in a certain direction and guide the alkaline mist to the exhaust outlet, reducing the dispersion of alkaline mist.

[0033] Preferably, the air supply outlet and the air exhaust outlet should be staggered to avoid airflow short-circuiting.

[0034] In another embodiment, the air jet output from the air outlet is directed towards the leakage point of the alkaline washing tank 1 to drive the alkaline mist away from the leakage point. This method can further reduce the leakage of alkaline mist. For example, spraying the air jet towards the squeeze roller / inspection door can achieve the effect of air curtain sealing and improve the sealing performance of the alkaline washing tank 1.

[0035] In one embodiment, such as Figure 2 An adsorbent layer 34 is provided in the return air channel 32 of the inducer 3, which can absorb alkaline mist in the return air; the adsorbent layer 34 includes, but is not limited to, modified honeycomb activated carbon impregnated with chemical reagents, which can efficiently absorb alkaline mist.

[0036] Among them, the return air inlet / return air channel 32 in the inducer 3 can be multiple, which can increase the processing capacity.

[0037] In one embodiment, such as Figure 2 A demisting layer 35 is provided in the air supply channel 33 of the inducer 3 to further remove alkaline mist and moisture content from the air supply airflow. The relatively dry air jet can also improve its effect in the alkaline washing tank 1, including jet kinetic energy and sealing performance at easily leaking points. Preferably, the demisting layer 35 is provided with a demisting baffle; of course, the demisting layer 35 can also be an adsorbent.

[0038] In the case where the alkaline mist purification mechanism 2 includes a scrubbing tower 21, preferably, a dryer is provided on the branch pipe 31, which can also correspondingly improve the dryness of the air jet.

[0039] In one embodiment, such as Figure 2 The aforementioned inducer 3 includes a static pressure box 36 and an induction box 37. The branch pipe 31 is connected to the static pressure box 36. The outlet side of the static pressure box 36 is provided with an air inlet nozzle, which faces into the induction box 37, for inputting an air jet into the induction box 37 to form a negative pressure. Both the return air port and the supply air port are provided on the induction box 37; the outlet side of the induction box 37 is provided with a supply air nozzle, which faces into the alkaline washing tank 1, for inputting a supply air jet into the alkaline washing tank 1.

[0040] Preferably, the spray angle of the air supply nozzle is adjustable, which can improve process flexibility.

[0041] Example 2

[0042] This embodiment is an optimization of the first embodiment described above.

[0043] Specifically, the aforementioned alkaline washing tank 1 is equipped with an alkaline washing tank 200, which enables the recycling of alkaline solution. The alkaline washing tank 200 is equipped with an iron sludge treatment subsystem, which is used to clean iron sludge impurities in the alkaline washing tank 200 online, thereby improving the operational stability and reliability of the alkaline washing system and reducing downtime and frequency of sludge removal.

[0044] like Figure 3 and Figure 4 The iron sludge treatment subsystem includes an intermediate medium circulation mechanism and an iron sludge recovery mechanism. The intermediate medium circulation mechanism includes several intermediate media 330 capable of extracting iron sludge from the bottom of the alkaline washing tank 200, and a medium conveying unit 331, a medium transfer unit 332, and a medium return unit 333 connected in sequence. The medium conveying unit 331 is connected to the intermediate medium outlet of the alkaline washing tank 200, and the medium return unit 333 is connected to the intermediate medium inlet of the alkaline washing tank 200. The iron sludge recovery mechanism includes a rinsing unit arranged above the medium transfer unit 332 and an iron sludge collection box 321 arranged below the medium transfer unit 332.

[0045] In one embodiment, the intermediate medium 330 includes steel balls for entraining iron sludge, which can conveniently carry the iron sludge from the bottom of the alkaline washing tank 200 out. The iron sludge at the bottom of the alkaline washing tank 200 is entrained by the layered flowing steel balls and carried out of the alkaline washing tank 200 by the medium conveying unit 331. When the surface of the steel balls is designed to have a certain roughness, the entrainment effect of the iron sludge can be improved. In one embodiment, the surface roughness Ra of the steel balls is ≥0.8μm, and more preferably controlled to Ra≤12μm.

[0046] In one embodiment, such as Figure 3The bottom of the alkaline washing tank 200 is provided with a slope, which slopes from the intermediate medium inlet to the intermediate medium outlet, facilitating the flow of the intermediate medium 330 within the alkaline washing tank 200. For example, the medium steel balls can move from the intermediate medium inlet to the intermediate medium outlet by gravity, and the medium steel balls at higher positions exert a squeezing and driving effect on the medium steel balls at lower positions and the iron sludge on the slope. Based on the circulation of the medium steel balls, the bottom of the alkaline washing tank 200 is always in motion, which can reduce the accumulation of iron sludge and thus save the intervention of power equipment. At the same time, the slope design also facilitates the deposition of iron sludge at the intermediate medium outlet, thereby making it easier for the intermediate medium 330 to carry the iron sludge out.

[0047] In one embodiment, the aforementioned medium conveying unit 331 employs a screw pump or a screw conveyor. Depending on the relative positional relationship between the intermediate medium outlet and the medium transfer unit 332, the screw pump or screw conveyor can be arranged at an angle or horizontally.

[0048] In one embodiment, such as Figure 3 and Figure 4 The media transfer unit 332 adopts a chain conveyor unit, such as a chain plate conveyor or a drag chain conveyor. Accordingly, the media transfer unit 332 includes an upper chain layer 3321 and a lower chain layer 3322.

[0049] In this case, the gap between the chain plates of the chain conveyor unit is smaller than the size of the intermediate medium 330, for example, smaller than the diameter of the medium steel ball.

[0050] The media conveying unit 331 is connected to the upper chain layer 3321. For example, the media output port of the media conveying unit 331 is located directly above the upper chain layer 3321, which can convey the intermediate media 330 to the upper chain layer 3321. Optionally, a hopper is arranged above the upper chain layer 3321 to receive the intermediate media 330 output by the media conveying unit 331 and transfer it to the upper chain layer 3321. This can prevent the intermediate media 330 from being ejected from the upper chain layer 3321 due to excessive drop distance.

[0051] The media return unit 333 is located on the outlet side of the chain conveyor unit. Optionally, the media return unit 333 is a conveyor roller conveyor used to transport the cleaned intermediate media 330 back to the alkaline washing tank 200.

[0052] The rinsing unit is used to rinse the intermediate medium 330 on the medium transfer unit 332, thereby separating the iron sludge from the intermediate medium 330. In one embodiment, such as Figure 4The rinsing unit includes a rinsing pipe 351, and at least one set of spray structures can be arranged at the bottom of the rinsing pipe 351. When there are multiple sets of spray structures, each spray structure is 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, each nozzle in the spray structure is preferably arranged sequentially along the width direction of the medium transfer unit 332.

[0053] Furthermore, such as Figure 4 The rinsing unit further includes a rinsing fluid supply pipe 352, which is connected to the rinsing pipe 351 and is used to supply rinsing fluid. Preferably, surface water from the alkaline washing tank 200 is used as the rinsing fluid, and correspondingly, the rinsing fluid supply pipe 352 is connected to the upper part of the alkaline washing tank 200.

[0054] The flushing fluid can exit via both sides of the media transfer unit 332, and / or, the media transfer unit 332 is a perforated conveying device, for example, it can exit via the gaps between the chain plates of the aforementioned chain conveyor unit. In one embodiment, such as Figure 3 and Figure 5 The iron sludge recovery mechanism also includes a diversion unit 322, which is arranged between the upper chain layer 3321 and the lower chain layer 3322 of the media transfer unit 332. The top inlet of the diversion unit 322 is located directly below the flushing unit, and the bottom outlet of the diversion unit 322 is located directly above the iron sludge collection tank 321. Based on this design, the flushing fluid can be reliably diverted to the iron sludge collection tank 321, resulting in a cleaner on-site environment. Simultaneously, flushing water carrying iron sludge is prevented from contaminating the lower chain layer 3322, thereby improving the operational reliability of the media transfer unit 332 and reducing its maintenance frequency.

[0055] Preferably, such as Figure 3 and Figure 5 The aforementioned drainage unit 322 has 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, and also facilitate the arrangement of the lower chain layer 3322, for example, the lower chain layer 3322 is located between the two drainage outlet pipes.

[0056] The upper chain layer 3321 can be arranged inside the inlet pipe, which can better capture the intermediate medium 330 and iron sludge splashed by the high-pressure jet.

[0057] Preferably, such as Figure 5The aforementioned diversion unit 322 is connected to the iron sludge collection box 321 to form an integral structure. For example, for the aforementioned inverted Y-shaped diversion unit 322, its outer frame 3221 is integrally formed with the iron sludge collection box 321 to form a top-closed box. An inverted V-shaped mud baffle 3222 is set inside the box, which correspondingly forms the inner frame of the diversion unit 322.

[0058] In one embodiment, a protective net 323 is also arranged around the upper chain layer 3321 of the media transfer unit 332, and the protective area of ​​the protective net 323 at least covers the rinsing area of ​​the upper chain layer 3321. By setting the protective net 323, the high-pressure jet can prevent the intermediate medium 330 from being ejected from the media transfer unit 332.

[0059] The protective net 323 can provide lateral protection. Optionally, the protective net 323 includes two side mesh panels 3231, which are respectively arranged on both sides of the conveying channel of the medium transfer unit 332. The side mesh panels 3231 are preferably not movable together with the medium transfer unit 332. For example, they are installed through mesh panel brackets. For the above-mentioned scheme with a diversion unit 322, the side mesh panels 3231 can also be installed on the outer frame 3221 of the diversion unit 322.

[0060] And / or, the protective net 323 can provide top protection. Optionally, the protective net 323 includes a top mesh panel 3232, which is installed above the media transfer unit 332. The top mesh panel 3232 is preferably not movable together with the media transfer unit 332, and its installation method can refer to the installation method of the side mesh panel 3231.

[0061] Further optimize the above-mentioned iron sludge treatment subsystem, such as Figure 3 and Figure 4 The iron sludge recycling mechanism also includes a filtration unit, and the iron sludge collection box 321 is provided with a flushing liquid recycling pipe connected to the filtration unit.

[0062] Optionally, the filtrate produced by the filtration unit can be reused as rinsing fluid. For example, the filtrate outlet pipe of the filtration unit is connected to a rinsing fluid storage tank, and the aforementioned rinsing fluid supply pipe 352 is also connected to the rinsing fluid storage tank. When the rinsing fluid is the surface water of the alkaline washing tank 200, the filtrate produced by the filtration unit can be returned to the alkaline washing tank 200, and correspondingly, the filtrate outlet pipe of the filtration unit is connected to the alkaline washing tank 200.

[0063] The iron sludge collection tank 321 can control the direction of the flushing fluid by overflow, and the aforementioned flushing fluid recovery pipe is connected to the overflow level of the iron sludge collection tank 321. Heavier impurities will settle at the bottom of the iron sludge collection tank 321 and can be cleaned periodically or irregularly.

[0064] In one embodiment, the filtration unit includes an electromagnetic filter 100 for removing ferromagnetic impurities from the rinsing fluid, which can reliably adsorb and remove suspended ferromagnetic impurities in the rinsing fluid.

[0065] Example 3

[0066] This embodiment provides an electromagnetic filter 100, which can be used in the above embodiment two.

[0067] like Figures 6-8 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 support 1021, a plurality of electromagnetic chucks 1022, and an electronic control unit for controlling the gain and loss of power of each electromagnetic chuck 1022. Each electromagnetic chuck 1022 is mounted on the annular support 1021 and is arranged in a ring along the circumference of the annular support 1021. The annular support 1021 is provided with a rotary drive mechanism 105 for driving its rotation. The annular support 1021 is partially located in the filter tank 101. The impurity collector 103 is arranged outside the filter tank 101 and includes an impurity removal section for removing impurities from the electromagnetic chucks 1022.

[0068] In one embodiment, the aforementioned annular support 1021 includes an inner ring frame and an outer ring frame, which 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 equipped with an electromagnetic chuck 1022.

[0069] Optionally, such as Figure 6 The spokes are radially distributed along the annular support 1021, and the inner ring frame, spokes, and outer ring frame are connected to form a hub shape.

[0070] The electromagnetic chuck 1022 is preferably detachably mounted on the annular bracket 1021, including but not limited to fixing with screws.

[0071] The surface of the electromagnetic chuck 1022 is preferably coplanar with the corresponding side surface of the annular support 1021. This facilitates the removal of impurities from the electromagnetic chuck 1022 and prevents the formation of corners between the electromagnetic chuck 1022 and the annular support 1021, which could lead to dirt accumulation.

[0072] Preferably, the annular bracket 1021 is connected to the rotary drive mechanism 105 via a bracket shaft 104. The rotary drive mechanism 105 drives the bracket shaft 104 to rotate, thereby causing the annular bracket 1021 and the electromagnetic chuck 1022 on the annular bracket 1021 to rotate.

[0073] In one embodiment, the rotary drive mechanism 105 adopts a structure of motor + transmission assembly. The transmission assembly can be a chain drive, belt pulley drive, or the like. The motor is preferably a variable frequency motor, which can control the rotational speed of the ring support 1021.

[0074] Preferably, the electrical control unit includes multiple electrical control cables and an electrical control module. The number of electrical control cables is the same as that of the electromagnetic chuck 1022 and they are connected in a one-to-one correspondence. Each electrical control cable is electrically connected to the electrical control module.

[0075] In one embodiment, the bracket shaft 104 is a hollow shaft, and all the electrical control cables are routed through the hollow cavity of the bracket shaft 104. This method facilitates the laying of electrical control cables and provides high safety and reliability. Preferably, a cable routing hole is provided on the annular bracket 1021 (e.g., the inner ring bracket) to facilitate the entry of the electrical control cables into the bracket shaft 104; a cable routing channel is also provided in the electromagnetic chuck 1022 to connect the electrical control cables to the coil inside the electromagnetic chuck 1022.

[0076] Preferably, the annular bracket 1021 is detachably mounted on the bracket shaft 104. In one embodiment, the bracket shaft 104 is segmented, with the annular bracket 1021 clamped between two shaft segments 1041 of the bracket shaft 104 (generally, the inner annular bracket is clamped between the two shaft segments 1041 of the bracket shaft 104). Optionally, a shoulder is machined on the shaft segment 1041, and the two ends of the inner hole of the inner annular bracket adopt a stepped hole structure. The journal at the end of the shaft segment 1041 is inserted into the large-diameter hole in the corresponding stepped hole structure, and the shoulder of the shaft segment 1041 abuts against the corresponding end face of the inner annular bracket, and the two are fixed by screws.

[0077] Furthermore, during the assembly of the rotating shaft segment 1041 and the inner ring frame, the electromagnetic chuck 1022 can be further clamped between them. For example, the outer ring wall of the inner ring frame adopts a stepped shaft structure, and a clamping groove is formed between the shoulder of one of the rotating shaft segments 1041 and the large-diameter wall of the stepped shaft outer ring wall. The corresponding side end of the electromagnetic chuck 1022 is clamped in the clamping groove. This method can improve the stability and reliability of the installation of the electromagnetic chuck 1022. In particular, when the electrical control cable needs to enter the electromagnetic chuck 1022 through the bracket rotating shaft 104, the above structure can ensure the alignment accuracy between the wiring hole on the ring bracket 1021 and the wiring channel in the electromagnetic chuck 1022, thereby avoiding damage to the electrical control cable and other malfunctions.

[0078] In one embodiment, the electronic control module includes a central controller and a conductive slip ring. Each of the electronic control cables is connected to the rotor portion of the conductive slip ring, and the central controller is connected to the stator portion of the conductive slip ring. Preferably, the rotor portion of the conductive slip ring is mounted on the support shaft 104. Based on this structure, reliable control of the gain and loss of power to each electromagnetic chuck 1022 can be ensured when the electromagnetic chuck 1022 is rotating normally.

[0079] The aforementioned central control unit includes, but is not limited to, a PLC controller.

[0080] When the annular support 1021 drives each electromagnetic chuck 1022 to rotate, some electromagnetic chucks 1022 are immersed in the filter tank 101 from outside the filter tank 101, while some electromagnetic chucks 1022 leave the filter tank 101 and swing upwards. For the upward-swinging electromagnetic chucks 1022, ferromagnetic impurities are adsorbed on their surface. The liquid that is carried away and the liquid in the adsorbed impurities can leave the electromagnetic chucks 1022 under the action of gravity, thus achieving the effect of gravity dehydration. The impurities collected in the impurity collector 103 have a low water content, which not only facilitates the subsequent treatment of impurities, but also reduces the loss of liquid in the filter tank 101.

[0081] In one embodiment, such as Figure 7 and Figure 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 disc surface of each electromagnetic chuck 1022. An annular water-retaining edge protrudes from the outer ring wall of the water-retaining ring 1023, and this annular water-retaining edge, together with each electromagnetic chuck 1022, forms a water-retaining groove. By setting the water-retaining ring 1023, the liquid can be effectively guided, preventing liquid from entering the support shaft 104 and other areas, thus avoiding interference with the normal operation of the electronic control unit.

[0082] Preferably, there are two water-blocking rings 1023, which are arranged on both sides of the annular support 1021.

[0083] Preferably, a sealing gasket can be sandwiched between the water-blocking ring 1023 and the electromagnetic chuck 1022 to improve the water-blocking effect.

[0084] At the impurity collection station, impurities can be scraped off the surface of the electromagnetic chuck 1022, or the surface of the electromagnetic chuck 1022 can be rinsed with high-pressure water or high-pressure air.

[0085] In one embodiment, such as Figures 6-8The impurity removal unit includes a scraper 1031, the working end of which contacts the surface of an electromagnetic chuck 1022 located at the impurity collection position; the impurity collector 103 also includes an impurity collection groove 1032, which is connected to the lower part of the scraper 1031. This method has low energy consumption and high reliability.

[0086] Generally, both sides of the electromagnetic chuck 1022 can adsorb impurities. Therefore, it is preferable to provide a scraper 1031 and an impurity collection groove 1032 on both sides of the annular support 1021 respectively. The distance between the working ends of the scraper 1031 on both sides is preferably the same as the thickness of the electromagnetic chuck 1022.

[0087] Preferably, such as Figure 7 and Figure 8 The aforementioned scraper blade 1031 is arranged at an angle, which facilitates the scraped impurities falling into the impurity collection tank 1032.

[0088] Optionally, the working end of the scraper 1031 is its top end, which is preferably parallel to the horizontal plane. That is, the contact line between the scraper 1031 and the electromagnetic chuck 1022 is parallel to the horizontal plane. This method can facilitate the arrangement of the scraper 1031, the impurity collection tank 1032, etc., and facilitate the collection of impurities.

[0089] Preferably, the scraper 1031 is a grooved plate. The length direction of the scraper 1031 is defined as the direction from its working end to the impurity collection groove 1032. Wings are formed at the two transverse ends of the scraper 1031, which can better constrain and guide the scraped impurities.

[0090] As a preferred embodiment, such as Figure 7 and Figure 8 The filter discs 102 are in multiple sets, and each of the annular brackets 1021 is sequentially mounted on the same bracket shaft 104, which is connected to the rotary drive mechanism 105. Providing multiple sets of filter discs 102 can improve filtration efficiency and filtration effect.

[0091] like Figure 7 Two adjacent filter discs 102 can share a single impurity collection tank 1032.

[0092] Preferably, such as Figure 7 Multiple partitions are provided in the filter tank 101, and each partition divides the filter tank 101 into multiple liquid storage tanks 1011. Preferably, each liquid storage tank 1011 is provided with a filter plate 102. The number of filter plates 102 and liquid storage tanks 1011 is preferably the same and they are configured in a one-to-one correspondence.

[0093] In one embodiment, upstream wastewater can be allowed to enter each storage tank 1011 simultaneously.

[0094] In another embodiment, the storage tanks 1011 can be connected in series. Upstream wastewater first enters the first storage tank 1011, and the wastewater flows between the upstream and downstream storage tanks 1011 via overflow. This allows for continuous wastewater treatment in a streamlined manner, ensuring treatment effectiveness and efficiency. Figure 7 In the first liquid storage tank 1011, the filter plate 102 is preferably arranged close to the sewage inlet, which can capture ferromagnetic impurities in the sewage in the first time and improve the electromagnetic filtration effect; in the last liquid storage tank 1011, the filter plate 102 is preferably arranged close to the filtrate outlet, which can improve the cleanliness of the discharged filtrate.

[0095] In particular, based on the segmented design of the bracket shaft 104 described above, it is convenient to install and arrange each filter disc 102; the number of filter discs 102 can be increased or decreased as needed, so the flexibility is very high; and it is convenient to maintain the equipment, for example, the filter discs 102 at the corresponding liquid storage tank 1011 can be disassembled and assembled without affecting the filtration process in other liquid storage tanks 1011.

[0096] The method of using the electromagnetic filter 100 mentioned above includes:

[0097] The annular support 1021 drives the electromagnetic chucks 1022 to rotate, allowing the electromagnetic chucks 1022 to circulate between the working position, the dehydration position, and the impurity removal position.

[0098] In the working position, the electromagnetic chuck 1022 is energized and at least partially immersed in the filter tank 101 to adsorb ferromagnetic impurities in the filter tank 101.

[0099] In the dehydration position, the electromagnetic chuck 1022 remains energized;

[0100] At the impurity removal station, the electromagnetic chuck 1022 is de-energized, and the impurity removal unit removes the impurities from the electromagnetic chuck 1022 and collects them.

[0101] 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 within the protection scope of the present invention.

Claims

1. An induced demisting caustic wash system comprising a caustic wash tank, an air exhaust opening of the caustic wash tank being connected with a caustic mist purification mechanism, characterized in that: The alkali washing tank is provided with an inducer having an air inlet, an air outlet and an air return, the air outlet and the air return are communicated with the tank cavity of the alkali washing tank, the purification gas outlet pipe of the alkali mist purification mechanism is provided with a branch pipe, and the branch pipe is connected with the air inlet. The alkali washing tank is provided with an alkali washing tank to realize the recycling of alkali liquor; the alkali washing tank is provided with an iron mud treatment subsystem for online cleaning of iron mud impurities in the alkali washing tank, the iron mud treatment subsystem includes a plurality of intermediate media capable of extracting iron mud at the bottom of the alkali washing tank and a medium conveying unit, a medium transfer unit and a medium return unit connected in sequence, the medium conveying unit is communicated with the intermediate media outlet of the alkali washing tank, and the medium return unit is communicated with the intermediate media inlet of the alkali washing tank; the iron mud recovery mechanism includes a flushing unit arranged above the medium transfer unit and an iron mud collection box arranged below the medium transfer unit; the intermediate media include medium steel balls for entraining iron mud; the bottom of the alkali washing tank is provided with a slope, the slope slopes from the intermediate media inlet to the intermediate media outlet, facilitating the circulation of intermediate media in the alkali washing tank.

2. The induced mist eliminator caustic scrubbing system of claim 1 wherein: The air return position on the alkali washing tank is located near the easy leakage point of the alkali washing tank.

3. The induced mist eliminator caustic scrubbing system of claim 1 wherein: The air outlet jet of the air outlet is directed towards the exhaust area for guiding the alkali mist in the tank to the air outlet.

4. The induced mist eliminator caustic scrubbing system of claim 1 wherein: The air outlet jet of the air outlet is directed towards the easy leakage point of the alkali washing tank for driving the alkali mist in the tank away from the easy leakage point.

5. The induced mist eliminator caustic scrubbing system of claim 1 wherein: An adsorbent layer is arranged in the air return channel of the inducer.

6. The induced mist eliminator caustic scrubbing system of claim 5 wherein: The adsorbent layer is modified honeycomb activated carbon treated by chemical reagent immersion.

7. The induced mist eliminator caustic scrubbing system of claim 1 wherein: A demisting layer is arranged in the air supply channel of the inducer.

8. The induced mist eliminator caustic scrubbing system of claim 7 wherein: The demisting layer is arranged with a demisting baffle.

9. The induced mist-eliminating caustic wash system of claim 1 wherein: The alkali mist purification mechanism includes an alkali mist collection pipeline, a washing tower arranged on the alkali mist collection pipeline and a centrifugal fan, and the branch pipe bypass point is located downstream of the centrifugal fan.

10. The induced mist eliminator caustic scrubbing system of claim 9 wherein: A dryer is arranged on the branch pipe.

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