Chlorine conveying multi-stage filter

Abstract

The invention relates to the technical field of multi-stage filtration, in particular to a chlorine conveying multi-stage filter which is used for multi-stage filtration of chlorine and comprises a multi-stage filtration mechanism which comprises a centrifugal cylinder frame for primary filtration of chlorine, a polytetrafluoroethylene film for secondary filtration and organic polymer adsorption resin for tertiary filtration. And a metal filter screen for intercepting large-particle impurities is arranged on the inner wall of the centrifugal cylinder frame. Chlorine in the filtering pipeline is extracted into the detection shell through the air extraction plate, and then clear water is sprayed to the chlorine through the water spraying plate, so that the chlorine and water are subjected to a chemical reaction and heat is released. The heat change is in direct proportion to the chlorine concentration, the heat change is detected through the thermistor, and the chlorine concentration is judged through the current change. And the PLC controller regulates and controls the working state of the sucking pump according to the detection result, so that part of chlorine is sucked back to be filtered again, and the chlorine concentration is adjusted.

Description

Technical Field

[0001] The invention relates to the technical field of multi-stage filtration, in particular to a chlorine gas delivery multi-stage filter. Background Art

[0002] Chlorine gas. In semiconductor processing technology, the purity of chlorine gas is crucial. Chlorine gas reacts with semiconductor materials such as silicon to etch. The presence of impurities may interfere with the reaction. If other substances contained in the chlorine gas may produce additional chemical reactions during the etching process, for example, impurities may form deposits on the surface of the silicon wafer, or compete with chlorine gas for the reaction with silicon, resulting in uneven etching and failure to accurately remove the required parts, thereby affecting the accuracy of the circuit pattern on the chip. Therefore, filtration is needed to ensure the purity of chlorine gas and improve process efficiency and product quality. For example, a filtration device for filtering out impurities in chlorine gas or liquid chlorine disclosed in application number CN201820439484.3 is a chlorine filtration treatment.

[0003] During the chlorine delivery process, the pressure provided by the chlorine supply source (such as chlorine cylinders and chlorine generators) is not constant, which causes pressure fluctuations in the delivery system, thereby causing differences in chlorine concentration. In multi-stage filtration, polytetrafluoroethylene (PTFE) membranes are usually used to intercept moisture and micron-sized particle impurities. However, in a high-concentration chlorine environment, chlorine molecules can more easily penetrate the filter material, causing the PTFE membrane to fail. Therefore, the PTFE membrane used in high-concentration chlorine requires a tighter microporous structure to prevent chlorine penetration, and the chlorine concentration needs to be monitored in real time. The chlorine concentration is adjusted according to the PTFE membrane used to ensure effective interception of moisture and micron-sized particles. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a chlorine gas transport multi-stage filter, which can effectively solve the problem that the prior art cannot adjust the chlorine gas concentration in real time according to the PTFE membrane used.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a chlorine gas delivery multi-stage filter, which is used for multi-stage filtration of chlorine gas, and comprises: Filter pipes; A multi-stage filtering mechanism, wherein the multi-stage filtering mechanism comprises a centrifugal drum frame for primary filtration of chlorine, a polytetrafluoroethylene membrane for secondary filtration, and an organic polymer adsorption resin for tertiary filtration, and the centrifugal drum frame, the polytetrafluoroethylene membrane, and the organic polymer adsorption resin are fixed in the filtering pipeline along the flow direction of chlorine, the inner wall of the centrifugal drum frame is provided with a metal filter for intercepting large particles of impurities, the polytetrafluoroethylene membrane is used to intercept moisture and micron-sized particles, and the organic polymer adsorption resin is used to remove organic pollutants; A concentration control mechanism, the concentration control mechanism includes a concentration detection component for detecting the concentration of chlorine gas, the concentration detection component includes an air extraction plate for extracting gas, the top of the air extraction plate is in sliding contact with a water spray plate, and a thermistor is embedded in the outer wall of one side of the air extraction plate close to the centrifugal cylinder frame; The temperature control mechanism comprises a temperature detection component for detecting the temperature of chlorine gas, the temperature detection component comprises an expansion fluid that expands under the influence of temperature, the temperature detection component also comprises a water bag containing the expansion fluid, the outer wall of the water bag is fixedly connected with a push plate, the top end of the push plate is fixedly connected with a conductive sheet, and the top end of the conductive sheet is in sliding contact with a resistor plate.

[0006] Preferably, a fixing frame is fixedly connected to the inner wall of the filter pipe, and the inner wall of one end of the fixing frame is rotatably connected to one end of the centrifugal cylinder frame.

[0007] Preferably, the multi-stage filtering mechanism further comprises a first motor fixedly connected to the outer wall of one side of the fixing frame close to the polytetrafluoroethylene membrane, the output end of the first motor is fixedly connected to a rotating rod, a plurality of sliding openings are provided in a circumferential array on the outer wall of the rotating rod, an adjusting block is slidably connected to the inner wall of the sliding opening, a connecting rod is fixedly connected to the outer wall of the centrifugal cylinder frame close to the fixing frame, the other end of the connecting rod passes through the fixing frame and extends to the outside thereof, and a plurality of the adjusting blocks and the connecting rod are jointly connected to the transmission by an elastic transmission belt; Preferably, the outer wall of the connecting rod is fixedly connected to a small gear, the outer wall of the fixed frame is rotatably connected to two symmetrical linkage rods, the outer wall of the linkage rod is fixedly connected to a large gear meshing with the small gear, the other end of the linkage rod is fixedly connected to a ventilation fan blade, and the other end of the connecting rod is fixedly connected to a limiting plate.

[0008] Preferably, it also includes a pressure control mechanism, which also includes a reciprocating screw fixedly connected to the outer wall of the limit plate, the other end of the reciprocating screw fixedly connected to the support plate, the other end of the support plate fixedly connected to the inner wall of the filter pipe, the outer wall of the reciprocating screw is sleeved with an extrusion plate, a telescopic rod is arranged between the fixed frame and the extrusion plate, the inner wall of the connecting rod is provided with an adjustment groove communicated with the sliding port, the inner wall of the adjustment groove is fixedly connected to a permanent magnet plate, a support tube is arranged between the adjustment groove and the permanent magnet plate, the outer wall of the support tube is sleeved with an airbag, and the airbag is fixedly connected to a side of the adjustment block close to the support tube, the inner wall of the adjustment groove is slidably connected to an electromagnetic plate that magnetically repels the permanent magnet plate, a ventilation pipe is connected between the permanent magnet plate and the airbag, and a plastic spring is arranged between the electromagnetic plate and the permanent magnet plate.

[0009] Preferably, the concentration detection component also includes a detection shell fixedly connected to the top of the filter pipe, the inner wall of the detection shell is fixedly connected with a partition, the air extraction plate is air-tightly slidably connected to the inner wall of the detection shell, the water spray plate is fixedly connected to the top of the detection shell, the bottom end of the air extraction plate is magnetically attracted to the position closest to the extrusion plate, the inner wall of the detection shell is fixedly connected with a press switch, the outer wall of the filter pipe is fixedly connected with a clean water shell and a collecting shell, the clean water shell is filled with clean water, the top of the detection shell is fixedly connected with a water pump, the water extraction end of the water pump is connected to the clean water shell, the drainage end of the water pump is connected to the water spray plate, a water outlet channel is opened in the partition, a pressure valve is provided in the water outlet channel, the other end of the water outlet channel is connected to the collecting shell, and a vent is provided between the filter pipe and the detection shell.

[0010] Preferably, the concentration control mechanism includes an air pump fixedly connected to the top of the filter pipe, the air suction end of the air pump is connected to the interior of the filter pipe, the exhaust end of the air pump passes through the filter pipe and extends into the centrifugal cylinder frame, and the air pump, thermistor, and electromagnetic plate electrical signals are connected to a PLC controller to form a concentration control loop.

[0011] Preferably, the temperature detection component also includes a temperature shell fixedly connected to the outer wall of one side of the extrusion plate close to the fixed frame, the inner wall of the temperature shell is fixedly connected to two upper and lower symmetrical fixed plates, the water bag a is arranged between the two fixed plates, and the tops of the two fixed plates are provided with movable grooves, the upper movable groove is in sliding contact with the conductive sheet, and the inner wall of the lower movable groove is slidably connected to a first heat conducting plate fixedly connected to the push plate a, the outer wall of the temperature shell is provided with a connecting groove, and the outer wall of the first heat conducting plate is fixedly connected to a second heat conducting plate in sliding contact with the connecting groove.

[0012] Preferably, the temperature control mechanism also includes a rotating groove opened inside the extrusion plate, the outer wall of the extrusion plate is provided with a connecting port connected to the rotating groove, the outer wall of the extrusion plate is fixedly connected to the second motor, the output end of the second motor is fixedly connected to the rotating block, the bottom end of the rotating block is fixedly connected to two blocking plates for blocking the connecting port, the outer wall of the blocking plate is in contact with the inner wall of the rotating groove, the inner peripheral wall of the rotating groove is fixedly connected to a refrigeration plate, and the heating end of the refrigeration plate is outside the filter pipe, the refrigeration end of the refrigeration plate is fixedly connected to a refrigeration rack, the outer wall of the refrigeration rack is fixedly connected to a third heat conducting plate, the top end of the third heat conducting plate is slidably connected to a fourth heat conducting plate, the fourth heat conducting plate and the outer wall of the refrigeration rack are jointly fixedly connected to a reset spring, and the outer walls of the two blocking plates are fixedly connected to push blocks that contact or separate from the fourth heat conducting plate; The conductive sheet, the resistor plate and the refrigeration plate are electrically connected to form a temperature control loop. The conductive sheet and the resistor plate constitute a sliding rheostat. When the conductive sheet slides on the resistor plate toward the extrusion plate, the resistance of the sliding rheostat in the temperature control loop gradually decreases. The push switch, the second motor, the water pump and the PLC controller are electrically connected to form a regulation loop.

[0013] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects: The chlorine in the filter pipe is extracted into the detection shell through the vacuum plate, and then the chlorine is sprayed with clean water using the water spray plate to promote the chemical reaction between the chlorine and water and release heat. The change in heat is proportional to the chlorine concentration. The heat change is detected by the thermistor, and the concentration of chlorine is determined by the change in current. The PLC controller adjusts the working state of the vacuum pump according to the test results to draw back part of the chlorine for re-filtration, thereby adjusting the chlorine concentration to ensure that the filtration process is always carried out in the optimal state, improving the filtration efficiency and processing capacity. At the same time, by adjusting the current in the electromagnetic plate, the expansion degree of the airbag is controlled, and then the extrusion plate and filtration pressure are adjusted to ensure that the chlorine concentration remains within an appropriate range, thereby improving the overall filtration effect and safety.

[0014] The chlorine gas temperature is sensed by the special expansion liquid contained in the water bag in the temperature detection component. This liquid has a significant volume expansion characteristic and can produce obvious volume changes when the temperature changes. When the temperature change causes the expansion liquid to expand or contract, it will push the conductive sheet in the water bag to slide on the resistor plate. The resistance value on the resistor plate will change according to the position of the conductive sheet, thereby changing the current transmitted to the cooling plate, and then changing the cooling power of the cooling plate, preventing the chlorine temperature from being too high and causing corrosion and damage to the fiber membrane material. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the cross section of the detection shell of the present invention; Figure 3 It is a cross-sectional three-dimensional structural schematic diagram of the present invention; Figure 4 It is a partial cross-sectional three-dimensional structural schematic diagram of the present invention; Figure 5 It is a schematic diagram of the cross-sectional three-dimensional structure of the extruded plate of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the temperature shell of the present invention; Figure 7 For the present invention Figure 5 A schematic diagram of the enlarged structure of part A.

[0017] Figure numerals: 1, filter pipe; 2, fixed frame; 3, multi-stage filtering mechanism; 31, centrifugal drum frame; 32, polytetrafluoroethylene membrane; 33, organic polymer adsorption resin; 34, metal filter; 35, first motor; 36, rotating rod; 37, sliding port; 38, adjusting block; 39, connecting rod; 310, elastic transmission belt; 311, small gear; 312, linkage rod; 313, large gear; 314, ventilation fan blade; 315, limit plate; 4, concentration control mechanism; 41, concentration detection component; 411, suction plate; 412, water spray plate; 413, detection shell; 414, partition; 415, press switch; 416, clean water shell; 417, collection shell; 418, water pump; 419, water outlet channel; 4110, vent; 42, suction pump; 5, temperature control mechanism; 5 1. Temperature detection component; 511a, water bag; 512a, push plate; 513, conductive sheet; 514, resistor plate; 515, temperature shell; 516, fixed plate; 517, movable slot; 518, first heat conducting plate; 519, connecting slot; 5110, second heat conducting plate; 52, rotating slot; 53, connecting port; 54, second motor; 55, rotating block; 56, blocking plate; 57, refrigeration plate; 58, refrigeration rack; 59, third heat conducting plate; 510, fourth heat conducting plate; 511b, reset spring; 512b, push block; 6. pressure control mechanism; 61, reciprocating screw; 62, support plate; 63, extrusion plate; 64, telescopic rod; 65, adjusting slot; 66, permanent magnet plate; 67, support tube; 68, air bag; 69, electromagnetic plate; 610, ventilation pipe; 611, plastic spring. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0019] The present invention will be further described below in conjunction with the embodiments.

[0020] Example: Refer to Figures 1 to 7, a chlorine gas delivery multi-stage filter, the filter is used for multi-stage filtration of chlorine gas, comprising: A filter pipe 1, the inner wall of which is fixedly connected with a fixing frame 2, the inner wall of one end of the fixing frame 2 is rotatably connected with one end of a centrifugal cylinder frame 31, the inner wall of the filter pipe 1 is fixedly connected with a polytetrafluoroethylene membrane 32 and an organic polymer adsorption resin 33, the organic polymer adsorption resin 33 is a polymer with a three-dimensional network structure, and its adsorption effect is mainly based on the interaction between the functional groups in its molecular structure and the adsorbed substance.

[0021] For organic pollutants, such as phenols, organic acids, organic amines, etc., the adsorption resin can adsorb the organic pollutants on the resin surface through hydrogen bonds, π-π interactions, hydrophobic effects, etc. For example, for phenol compounds in wastewater, the benzene ring structure in the adsorption resin can interact with the benzene ring of phenols through π-π interactions to adsorb phenols.

[0022] As for chlorine, this resin generally does not have specific adsorption sites for chlorine, and the chemical properties of chlorine are relatively active. It usually does not undergo physical or chemical adsorption with the adsorption resin like organic pollutants. The organic polymer adsorption resin 33 can selectively adsorb organic pollutants but not chlorine.

[0023] The chlorine gas is filtered in multiple stages by the multi-stage filtering mechanism 3, referring to Figure 3 , Figure 4 , a multi-stage filtering mechanism 3, the multi-stage filtering mechanism 3 includes a centrifugal drum frame 31 for primary filtration of chlorine, a polytetrafluoroethylene membrane 32 for secondary filtration, and an organic polymer adsorption resin 33 for tertiary filtration, and the centrifugal drum frame 31, the polytetrafluoroethylene membrane 32, and the organic polymer adsorption resin 33 are fixed in the filtering pipeline 1 along the flow direction of chlorine, the inner wall of the centrifugal drum frame 31 is provided with a metal filter 34 for intercepting large particles of impurities, the polytetrafluoroethylene membrane 32 is used to intercept moisture and micron-sized particles, and the organic polymer adsorption resin 33 is used to remove organic pollutants; The multi-stage filtering mechanism 3 also includes a first motor 35 fixedly connected to the outer wall of one side of the fixing frame 2 close to the polytetrafluoroethylene membrane 32, a rotating rod 36 is fixedly connected to the output end of the first motor 35, a plurality of sliding openings 37 are provided in a circumferential array on the outer wall of the rotating rod 36, an adjusting block 38 is slidably connected to the inner wall of the sliding opening 37, a connecting rod 39 is fixedly connected to the outer wall of the centrifugal cylinder frame 31 close to the fixing frame 2, the other end of the connecting rod 39 passes through the fixing frame 2 and extends to the outside thereof, a plurality of adjusting blocks 38 and the connecting rod 39 are jointly connected to an elastic transmission belt 310 for transmission, and the elastic transmission belt 310 can adapt to the adjustment of the adjusting block 38; The outer wall of the connecting rod 39 is fixedly connected with a small gear 311, and the outer wall of the fixed frame 2 is rotatably connected with two symmetrical linkage rods 312. The outer wall of the linkage rod 312 is fixedly connected with a large gear 313 meshing with the small gear 311, and the other end of the linkage rod 312 is fixedly connected with a ventilation fan blade 314. The other end of the connecting rod 39 is fixedly connected with a limiting plate 315. Through the gear transmission of the large gear 313 and the small gear 311, the rotation speed of the ventilation fan blade 314 is reduced to prevent excessive dispersion of chlorine due to excessive rotation speed of the ventilation fan blade 314.

[0024] The concentration of chlorine gas is detected by the concentration control mechanism 4, and the pressure is controlled according to the concentration. Figure 1 ,to Figure 3 , the concentration control mechanism 4 includes a concentration detection component 41 for detecting the concentration of chlorine gas, the concentration detection component 41 includes an air extraction plate 411 for extracting gas, the top of the air extraction plate 411 is in sliding contact with a water spray plate 412, and a thermistor is embedded in the outer wall of one side of the air extraction plate 411 close to the centrifugal drum frame 31; The concentration detection component 41 also includes a detection shell 413 fixedly connected to the top of the filter pipe 1, a partition 414 is fixedly connected to the inner wall of the detection shell 413, an air extraction plate 411 is airtightly slidably connected to the inner wall of the detection shell 413, a water spray plate 412 is fixedly connected to the top of the detection shell 413, the bottom end of the air extraction plate 411 is magnetically attracted to the closest position of the extrusion plate 63, a push switch 415 is fixedly connected to the inner wall of the detection shell 413, and a clean water shell 416 is fixedly connected to the outer wall of the filter pipe 1. The collecting shell 417 and the clean water shell 416 are filled with clean water, and the top of the detection shell 413 is fixedly connected with a water pump 418, the water pumping end of the water pump 418 is connected with the clean water shell 416, and the water discharge end of the water pump 418 is connected with the water spray plate 412, and a water outlet channel 419 is opened in the partition plate 414, and a pressure valve is arranged in the water outlet channel 419, and the other end of the water outlet channel 419 is connected with the collecting shell 417, and a vent 4110 is arranged between the filter pipe 1 and the detection shell 413.

[0025] The concentration control mechanism 4 includes an air pump 42 fixedly connected to the top of the filter pipe 1, the air suction end of the air pump 42 is connected to the inside of the filter pipe 1, the exhaust end of the air pump 42 passes through the filter pipe 1 and extends into the centrifugal cylinder frame 31, and the air pump 42, the thermistor, and the electromagnetic plate 69 are electrically connected to the PLC controller to form a concentration control loop.

[0026] The chlorine gas temperature is detected by the temperature control mechanism 5, and the chlorine gas temperature is adjusted in real time. Figure 1 , Figures 5 to 7, temperature control mechanism 5, the temperature control mechanism 5 includes a temperature detection component 51 for detecting the temperature of chlorine gas, the temperature detection component 51 includes an expansion liquid that expands under the influence of temperature, the temperature detection component 51 also includes a water bag 511a containing the expansion liquid, the outer wall of the water bag 511a is fixedly connected to a push plate 512a, the top of the push plate 512a is fixedly connected to a conductive sheet 513, the top of the conductive sheet 513 is in sliding contact with a resistor plate 514, wherein the expansion liquid is an amalgam expansion liquid, and the amalgam is an alloy formed by mercury and other metals. The volume of some amalgams will change significantly with changes in temperature. For example, some amalgams containing metals such as bismuth and tin, when the temperature rises, the atomic spacing inside the alloy will increase, thereby causing the entire liquid volume to expand. This is because the thermal motion of metal atoms intensifies with the increase in temperature, the interaction force between atoms changes, and the atomic spacing increases, which is used as a sensing liquid in some high-precision temperature sensors. When the temperature changes, the volume change of the amalgam can be accurately measured, thereby achieving accurate monitoring of the temperature; The temperature detection component 51 also includes a temperature shell 515 fixedly connected to the outer wall of one side of the extrusion plate 63 close to the fixed frame 2, and the inner wall of the temperature shell 515 is fixedly connected to two upper and lower symmetrical fixed plates 516, and the water bag 511a is arranged between the two fixed plates 516. The tops of the two fixed plates 516 are each provided with a movable groove 517, and the upper movable groove 517 is in sliding contact with the conductive sheet 513, and the inner wall of the lower movable groove 517 is slidably connected to a first heat conducting plate 518 fixedly connected to the push plate 512a, and the outer wall of the temperature shell 515 is provided with a connecting groove 519, and the outer wall of the first heat conducting plate 518 is fixedly connected to a second heat conducting plate 5110 in sliding contact with the connecting groove 519, wherein the temperature shell 515 is made of a heat conductive material.

[0027] The temperature control mechanism 5 also includes a rotating groove 52 opened inside the extrusion plate 63, and the outer wall of the extrusion plate 63 is provided with a communication port 53 connected to the rotating groove 52. The outer wall of the extrusion plate 63 is fixedly connected to the second motor 54, and the output end of the second motor 54 is fixedly connected to the rotating block 55. The bottom end of the rotating block 55 is fixedly connected to two blocking plates 56 for blocking the communication port 53. The outer wall of the blocking plate 56 contacts the inner wall of the rotating groove 52. The inner peripheral wall of the rotating groove 52 is fixedly connected to the refrigeration plate 5 7, and the heating end of the cooling plate 57 is outside the filter pipe 1, the cooling end of the cooling plate 57 is fixedly connected to the cooling frame 58, the outer wall of the cooling frame 58 is fixedly connected to the third heat conducting plate 59, the top of the third heat conducting plate 59 is slidably connected to the fourth heat conducting plate 510, the fourth heat conducting plate 510 and the outer wall of the cooling frame 58 are fixedly connected to the return spring 511b, the outer walls of the two blocking plates 56 are fixedly connected to the push block 512b that contacts or separates from the fourth heat conducting plate 510, and the push block 512b is a heat conducting plate. The conductive sheet 513, the resistor plate 514 and the refrigeration plate 57 are electrically connected to form a temperature control circuit. The conductive sheet 513 and the resistor plate 514 constitute a sliding rheostat. When the conductive sheet 513 slides on the resistor plate 514 toward the extrusion plate 63, the resistance of the sliding rheostat in the temperature control circuit gradually decreases. The push switch 415, the second motor 54, the water pump 418 and the PLC controller are electrically connected to form a regulating circuit, wherein the start and stop time of the second motor 54 is calculated according to the moving speed of the extrusion plate 63, wherein the moving speed of the extrusion plate 63 is according to the outward extension distance of the regulating block 38, and the longer the extension distance of the regulating block 38, the slower the moving speed. Then, the PLC controller detects the amount of current passing through the thermistor (after sensing heat), and then calculates the moving distance of the regulating block 38, and then calculates the stop time of the second motor 54 according to the start time of the second motor 54, wherein the start time of the second motor 54 is 30 seconds after the push switch 415 is triggered.

[0028] The filtration pressure is controlled by the pressure control mechanism 6 according to the chlorine concentration. Figure 3 , Figure 4, and also includes a pressure control mechanism 6, which also includes a reciprocating screw rod 61 fixedly connected to the outer wall of the limit plate 315, the other end of the reciprocating screw rod 61 is fixedly connected to a support plate 62, the other end of the support plate 62 is fixedly connected to the inner wall of the filter pipe 1, the outer wall of the reciprocating screw rod 61 is sleeved with an extrusion plate 63, a telescopic rod 64 is arranged between the fixed frame 2 and the extrusion plate 63, the inner wall of the connecting rod 39 is provided with an adjustment groove 65 communicating with the sliding port 37, and the inner wall of the adjustment groove 65 is fixedly connected with a permanent magnet plate 66, a support tube 67 is arranged between the adjustment groove 65 and the permanent magnet plate 66, an air bag 68 is sleeved on the outer wall of the support tube 67, and the air bag 68 is fixedly connected to the side of the adjustment block 38 close to the support tube 67, an electromagnetic plate 69 that repel magnetically with the permanent magnet plate 66 is slidably connected to the inner wall of the adjustment groove 65, a ventilation tube 610 is connected between the permanent magnet plate 66 and the air bag 68, a plastic spring 611 is arranged between the electromagnetic plate 69 and the permanent magnet plate 66, and in the initial state, the extrusion plate 63 is located on the side close to the polytetrafluoroethylene membrane 32.

[0029] This solution involves a chlorine gas delivery and filtration system, which has the following characteristics: Periodic suction and transportation: The first motor 35 is started to drive the centrifugal drum frame 31 to rotate to achieve preliminary filtration of the chlorine. At the same time, during the movement of the extrusion plate 63, the magnetic attraction of the suction plate 411 is used to suck the chlorine into the detection shell 413, thereby achieving periodic suction and transportation of the chlorine, ensuring the orderly flow and treatment of the chlorine in the filtration pipeline 1.

[0030] Periodic detection: After chlorine enters the detection shell 413, water and chlorine react to release heat, and the heat is detected by thermistor to reflect the chlorine concentration, thereby realizing periodic detection of the chlorine concentration, so as to timely grasp the chlorine concentration and provide a basis for subsequent adjustment.

[0031] Periodic regulation of delivery pressure: According to the current detected by the thermistor, the current flowing into the electromagnetic plate 69 is adjusted to control the lifting height of the regulating block 38, thereby changing the transmission ratio of the connecting rod 39 and the rotating rod 36, and adjusting the moving speed and distance of the extrusion plate 63, so as to achieve the purpose of periodic regulation of the chlorine delivery pressure, so as to ensure that the chlorine passes through the filter material at a suitable flow rate, and ensure the filtering effect and production efficiency.

[0032] Through the above-mentioned periodic suction and delivery, periodic detection and periodic adjustment of delivery pressure, the problems of poor filtration effect and fiber membrane corrosion damage caused by unstable flow rate, uneven concentration and temperature changes in the chlorine delivery and filtration process are solved, and efficient, stable filtration and safe delivery of chlorine are achieved, thereby improving the reliability and stability of the entire system, extending the service life of key components such as fiber membranes, and ensuring that the chlorine treatment process meets the requirements of safe production and quality control.

[0033] Specifically: First, the filter pipe 1 is connected to the transmission pipe, and then the chlorine is discharged into the filter pipe 1. The centrifugal force of the centrifugal drum frame 31 allows the metal filter 34 to intercept large particles in the chlorine, and the chlorine is squeezed by the squeezing plate 63. The water and micron-level particles in the chlorine are intercepted by the polytetrafluoroethylene membrane 32, and then the organic pollutants are adsorbed by the organic polymer adsorption resin 33 to achieve a multi-stage filtration effect.

[0034] After the chlorine gas is introduced, the first motor 35 is started, the first motor 35 drives the rotating rod 36 to rotate, and then the elastic transmission belt 310 drives the connecting rod 39 to rotate, thereby driving the centrifugal drum frame 31 to rotate rapidly, thereby filtering the chlorine gas; During the rotation of the connecting rod 39, the small gear 311 is driven to rotate, and the large gear 313 is driven to rotate through the small gear 311, so that the linkage rod 312 is synchronously rotated, and the ventilation fan blades 314 are driven to rotate synchronously through the transmission rod, so that the chlorine gas is quickly mixed to prevent the accumulation of chlorine gas and uneven concentration.

[0035] In the process of the first motor 35 driving the rotating rod to rotate synchronously, the reciprocating screw 61 is driven to rotate synchronously through the limit block, and the extrusion plate 63 is limited by the telescopic rod 64 to make the extrusion plate 63 slide back and forth on the reciprocating screw 61. At the same time, the temperature of the chlorine gas is transmitted to the expansion liquid in the water bag 511a through the temperature shell 515. The expansion liquid expands due to heat, and then drives the push plate 512a to move forward. The push plate 512a drives the conductive sheet 513 to slide on the resistor plate 514. When the chlorine temperature exceeds the threshold, the push plate 512a will drive the conductive sheet 513 and the resistor plate 514 to slide. The conductive sheet 513 contacts the resistance plate 514. When the temperature of the chlorine is higher, the moving distance of the conductive sheet 513 on the resistance plate 514 is longer, and the current passing through the refrigeration plate 57 is larger, thereby increasing the refrigeration power of the refrigeration plate 57, and then cooling the refrigeration rack 58, thereby cooling the chlorine. The purpose is that chlorine is a strong oxidant and reacts chemically with a variety of substances. The increase in temperature will increase the chemical reaction activity of chlorine, which may cause accelerated corrosion and damage to the fiber membrane material. Therefore, controlling the temperature can prevent the occurrence of these adverse chemical reactions and extend the service life of the fiber membrane.

[0036] When the extrusion plate 63 applies pressure to the chlorine gas (the extrusion plate 63 moves toward the direction of the polytetrafluoroethylene film 32), the blocking plate 56 blocks the communication port 53, so that the extrusion plate 63 will squeeze the fourth heat conducting plate 510 through the push block 512b, so that the fourth heat conducting plate 510 is in close contact with the second heat conducting plate 5110. Since the temperature of the refrigeration rack 58 is lower than the temperature of the expansion liquid in the water bag 511a, according to the second law of thermodynamics, heat will spontaneously transfer from the high-temperature object (the expansion liquid in the water bag 511a) to the low-temperature object (the refrigeration rack 58). At this time, the heat on the refrigeration rack 58 is firstly transferred to the fourth heat conducting plate 510 in contact with it through the third heat conducting plate 59, and then sequentially transferred to the second heat conducting plate 5110 and the first heat conducting plate 518, and finally the heat is transferred back to the expansion liquid in the water bag 511a through the push block 512b, so that the expansion liquid is cooled, thereby driving the partition plate 414, the second heat conducting plate 5110, and the first heat conducting plate 518 to reset. After the reset, the second heat conducting plate 5110 will not contact the third heat conducting plate 59, so as to continue to detect the chlorine temperature later.

[0037] Then start the second motor 54, and drive the rotating block 55 to rotate 90 degrees through the second motor 54, thereby driving the blocking plate 56 to rotate to one side, thereby exposing the connecting port 53, and then move toward the direction of the fixed frame 2 through the extrusion plate 63, so that the chlorine gas enters the other side of the extrusion plate 63. When the extrusion plate 63 moves to the side of the reciprocating screw 61 close to the fixed frame 2 and is about to move in the opposite direction, at this time, the space on the side of the extrusion plate 63 close to the polytetrafluoroethylene membrane 32 is sufficient with chlorine gas, and there is no need to continue to inject chlorine gas into this space.

[0038] Then, the second motor 54 is started, and the rotating block 55 is driven to rotate 90 degrees in the opposite direction by the second motor so that the blocking plate 56 blocks the connecting port 53, and then the chlorine gas is pressurized by the squeezing plate 63 so that the chlorine gas passes through the polytetrafluoroethylene membrane 32 for secondary filtration; When the squeezing plate 63 moves toward the polytetrafluoroethylene membrane 32, the magnetic attraction will drive the suction plate 411 to move toward the polytetrafluoroethylene membrane 32, and then the chlorine in the filter pipe 1 will be sucked out through the vent 4110, and then discharged into the detection shell 413. When the suction plate 411 moves to the end of the detection shell 413, the suction plate 411 squeezes the press switch 415, and then the PLC controller controls the water pump 418 to inject water into the water spray plate 412, and then the water is sprayed on the chlorine through the water spray plate 412. When the chlorine contacts the water, a chemical reaction will occur and heat will be released. This phenomenon is called an exothermic reaction. In this reaction, chlorine reacts with water to generate hypochlorous acid and hydrochloric acid, while releasing heat. According to the concentration-rate relationship of chemical reactions (the law of mass action), the higher the concentration of the reactants, the faster the reaction rate. An increase in chlorine concentration means that more chlorine molecules contact and react with water molecules per unit time, thereby releasing more heat. Then, the hypochlorous acid and hydrochloric acid generated above are squeezed into the water outlet channel through the reset of the suction plate 411 (the reset process of the extrusion plate 63 drives the reset of the suction plate 411), and then discharged into the collection shell 417.

[0039] When the thermistor reflects that the current heat is too high through its own resistance value, it means that the chlorine concentration is too high, and then the vacuum pump 42 is started through the PLC controller to extract the chlorine and then discharge it into the centrifugal drum rack 31 in the front to reduce the chlorine concentration in the rear.

[0040] At the same time, the higher the heat detected by the thermistor, the higher the chlorine concentration. Although the chlorine is extracted and discharged to the front by the vacuum pump 42, the chlorine concentration may not necessarily meet the filtering requirements. Therefore, the current passing through the thermistor is detected by the PLC controller, and then the current passed into the electromagnetic plate 69 is adjusted according to the detection result. When the current is larger, the concentration is lower, so the current passed into the electromagnetic plate 69 is smaller, so the electromagnetic plate 69 moves toward the permanent magnet plate 66. The smaller the air is squeezed into the air bag 68, the smaller the lifting distance of the adjustment block 38. When the lifting distance of the adjustment block 38 becomes smaller, the relative distance between the connecting rod 39 and the rotating rod 36 will be changed. The positional relationship makes the transmission ratio between them smaller, the transmission ratio of the connecting rod 39 and the rotating rod 36 is smaller, so the moving distance of the extrusion plate 63 is faster. On the contrary, the greater the current passed into the electromagnetic plate 69, the greater the lifting height of the adjustment block 38. Therefore, the transmission ratio of the connecting rod 39 and the rotating rod 36 is larger, so the moving speed of the extrusion plate 63 is slower, and then the pressure of the chlorine filtration is adjusted. The reason is that pressure is an important parameter for controlling the gas flow rate. Appropriate pressure can ensure that chlorine passes through the fiber membrane at the required flow rate, thereby achieving efficient filtration. Too high pressure will cause the flow rate to be too fast, which may affect the filtration effect, while too low pressure may cause the flow rate to be too slow, reducing production efficiency.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A chlorine gas delivery multi-stage filter, the filter is used for multi-stage filtration of chlorine gas, characterized in that: include: filter pipeline (1); A multi-stage filtering mechanism (3), the multi-stage filtering mechanism (3) comprising a centrifugal cartridge frame (31) for primary filtration of chlorine, a polytetrafluoroethylene membrane (32) for secondary filtration, and an organic polymer adsorption resin (33) for tertiary filtration, wherein the centrifugal cartridge frame (31), the polytetrafluoroethylene membrane (32), and the organic polymer adsorption resin (33) are fixed in the filtering pipe (1) along the flow direction of the chlorine, the inner wall of the centrifugal cartridge frame (31) is provided with a metal filter screen (34) for intercepting large particle impurities, the polytetrafluoroethylene membrane (32) is used to intercept moisture and micron-sized particles, and the organic polymer adsorption resin (33) is used to remove organic pollutants; A concentration control mechanism (4), the concentration control mechanism (4) comprising a concentration detection component (41) for detecting the concentration of chlorine gas, the concentration detection component (41) comprising an air extraction plate (411) for extracting air, the top end of the air extraction plate (411) being in sliding contact with a water spray plate (412), and a thermistor being embedded in an outer wall of a side of the air extraction plate (411) close to the centrifugal cartridge frame (31); the concentration control mechanism (4) comprising an air extraction pump (42) fixedly connected to the top end of the filter pipe (1), the air extraction end of the air extraction pump (42) being in communication with the interior of the filter pipe (1), the exhaust end of the air extraction pump (42) passing through the filter pipe (1) and extending into the centrifugal cartridge frame (31), the air extraction pump (42), the thermistor, and the electrical signal being connected to a PLC controller to form a concentration control loop; A temperature control mechanism (5), the temperature control mechanism (5) comprising a temperature detection component (51) for detecting the temperature of chlorine gas, the temperature detection component (51) comprising an expansion liquid that expands under the influence of temperature, the temperature detection component (51) further comprising a water bag (511a) containing the expansion liquid, the outer wall of the water bag (511a) being fixedly connected to a push plate (512a), the top end of the push plate (512a) being fixedly connected to a conductive sheet (513), and the top end of the conductive sheet (513) being in sliding contact with a resistor plate (514).

2. A chlorine gas delivery multi-stage filter according to claim 1, characterized in that: The inner wall of the filtering pipe (1) is fixedly connected to a fixing frame (2), and the inner wall of one end of the fixing frame (2) is rotatably connected to one end of the centrifugal cylinder frame (31).

3. A chlorine gas delivery multi-stage filter according to claim 2, characterized in that: The multi-stage filtering mechanism (3) further comprises a first motor (35) fixedly connected to the outer wall of a side of the fixing frame (2) close to the polytetrafluoroethylene membrane (32); the output end of the first motor (35) is fixedly connected to a rotating rod (36); a plurality of sliding openings (37) are provided in a circumferential array on the outer wall of the rotating rod (36); an adjusting block (38) is slidably connected to the inner wall of the sliding opening (37); a connecting rod (39) is fixedly connected to the outer wall of the centrifugal cylinder frame (31) close to the fixing frame (2); the other end of the connecting rod (39) passes through the fixing frame (2) and extends to the outside thereof; and the plurality of adjusting blocks (38) and the connecting rod (39) are jointly transmission-connected to an elastic transmission belt (310); The outer wall of the connecting rod (39) is fixedly connected to a small gear (311); the outer wall of the fixing frame (2) is rotatably connected to two symmetrical linkage rods (312); the outer wall of the linkage rod (312) is fixedly connected to a large gear (313) meshing with the small gear (311); the other end of the linkage rod (312) is fixedly connected to a ventilation fan blade (314); and the other end of the connecting rod (39) is fixedly connected to a limiting plate (315).

4. A chlorine gas delivery multi-stage filter according to claim 3, characterized in that: The pressure control mechanism (6) further comprises a reciprocating screw (61) fixedly connected to the outer wall of the limit plate (315), the other end of the reciprocating screw (61) being fixedly connected to a support plate (62), the other end of the support plate (62) being fixedly connected to the inner wall of the filter pipe (1), the outer wall of the reciprocating screw (61) being sleeved with an extrusion plate (63), a telescopic rod (64) being arranged between the fixing frame (2) and the extrusion plate (63), the inner wall of the connecting rod (39) being provided with an adjustment groove (65) communicating with the sliding opening (37), the inner wall of the adjustment groove (65) being fixedly connected to A permanent magnet plate (66), a support tube (67) is provided between the adjustment groove (65) and the permanent magnet plate (66), an air bag (68) is sleeved on the outer wall of the support tube (67), and the air bag (68) is fixedly connected to a side of the adjustment block (38) close to the support tube (67), an electromagnetic plate (69) that magnetically repels the permanent magnet plate (66) is slidably connected to the inner wall of the adjustment groove (65), a ventilation tube (610) is connected between the permanent magnet plate (66) and the air bag (68), a plastic spring (611) is provided between the electromagnetic plate (69) and the permanent magnet plate (66), and the electromagnetic plate (69) is connected to a PLC controller via electrical signals.

5. A chlorine gas delivery multi-stage filter according to claim 4, characterized in that: The concentration detection assembly (41) further comprises a detection shell (413) fixedly connected to the top end of the filtration pipe (1); a partition plate (414) is fixedly connected to the inner wall of the detection shell (413); the air extraction plate (411) is airtightly slidably connected to the inner wall of the detection shell (413); the water spray plate (412) is fixedly connected to the top end of the detection shell (413); the bottom end of the air extraction plate (411) is magnetically attracted to the closest position of the extrusion plate (63); the inner wall of the detection shell (413) is fixedly connected to a push switch (415); the outer wall of the filtration pipe (1) is fixedly connected to a clean water shell (416), a collecting shell (417), and a pressure switch (418). The clean water shell (416) is filled with clean water, a water pump (418) is fixedly connected to the top of the detection shell (413), a water pumping end of the water pump (418) is connected to the clean water shell (416), a water discharge end of the water pump (418) is connected to the water spray plate (412), a water outlet channel (419) is opened in the partition plate (414), a pressure valve is arranged in the water outlet channel (419), the other end of the water outlet channel (419) is connected to the collection shell (417), and a vent (4110) is arranged between the filtration pipe (1) and the detection shell (413).

6. A chlorine gas delivery multi-stage filter according to claim 5, characterized in that: The temperature detection component (51) further comprises a temperature shell (515) fixedly connected to the outer wall of one side of the extrusion plate (63) close to the fixed frame (2); the inner wall of the temperature shell (515) is fixedly connected to two upper and lower symmetrical fixed plates (516); the water bag (511a) is arranged between the two fixed plates (516); the tops of the two fixed plates (516) are provided with a movable groove (517); the movable groove (517) at the upper end is in sliding contact with the conductive sheet (513); the inner wall of the movable groove (517) at the lower end is slidably connected to a first heat conducting plate (518) fixedly connected to the push plate (512a); the outer wall of the temperature shell (515) is provided with a connecting groove (519); the outer wall of the first heat conducting plate (518) is fixedly connected to a second heat conducting plate (5110) in sliding contact with the connecting groove (519).

7. A chlorine gas delivery multi-stage filter according to claim 6, characterized in that: The temperature control mechanism (5) further comprises a rotating groove (52) provided inside the extrusion plate (63); a communication port (53) communicating with the rotating groove (52) is provided on the outer wall of the extrusion plate (63); a second motor (54) is fixedly connected to the outer wall of the extrusion plate (63); a rotating block (55) is fixedly connected to the output end of the second motor (54); two blocking plates (56) for blocking the communication port (53) are fixedly connected to the bottom end of the rotating block (55); the outer wall of the blocking plate (56) is in contact with the inner wall of the rotating groove (52); and the inner peripheral wall of the rotating groove (52) is fixedly connected to the output end of the second motor (54). A cooling plate (57) is fixedly connected thereto, and the heating end of the cooling plate (57) is located outside the filter pipe (1); the cooling end of the cooling plate (57) is fixedly connected to a cooling frame (58); the outer wall of the cooling frame (58) is fixedly connected to a third heat conducting plate (59); the top end of the third heat conducting plate (59) is slidably connected to a fourth heat conducting plate (510); the fourth heat conducting plate (510) and the outer wall of the cooling frame (58) are fixedly connected to a return spring (511b); and the outer walls of the two blocking plates (56) are fixedly connected to push blocks (512b) that contact or separate from the fourth heat conducting plate (510); The conductive sheet (513), the resistance plate (514) and the refrigeration plate (57) are electrically connected to form a temperature control loop; the conductive sheet (513) and the resistance plate (514) constitute a sliding rheostat; during the sliding process of the conductive sheet (513) on the resistance plate (514) toward the extrusion plate (63), the resistance of the sliding rheostat in the temperature control loop gradually decreases; the push switch (415), the second motor (54), the water pump (418) and the PLC controller are electrically connected to form a regulation loop.

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