A continuous treatment high-salinity wastewater harmless treatment device

Abstract

The application relates to the technical field of wastewater treatment equipment, and discloses a continuous high-salinity wastewater harmless treatment device, which comprises a sleeve, a center pipe is arranged in the sleeve, a composite filter layer is wound on the center pipe, a flexible layer is wrapped on the outer layer of the composite filter layer, a moving ring is arranged in the sleeve, a pressing rod is fixedly installed on the inner side of the moving ring, the pressing rod is in contact with the flexible layer, a sliding block is installed on the side of the moving ring, a through slot is formed in the side wall of the sleeve, the sliding block is slidingly installed in the through slot, a motor is arranged on the side of the sleeve, a lead screw is connected to the output shaft of the motor, and the lead screw is in threaded connection with the sliding block. The raw water channel in the inner side of the composite filter layer changes from a straight line into a curve, so that the impact force of the raw water on the raw water channel in the inner side of the composite filter layer is increased, and the calcium-magnesium ions, organic matters and the like in the raw water are prevented from being accumulated on the surface of the composite filter layer.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment equipment technology, specifically to a device for the continuous treatment of high-salt wastewater to achieve harmlessness. Background Technology

[0002] Spiral wound reverse osmosis membranes are currently the most widely used type of reverse osmosis membrane, especially in seawater desalination, brackish water desalination, pure water production, and industrial water treatment. The core of a spiral wound reverse osmosis membrane is a multi-layer composite membrane sheet, combined with a product water separator, a feed water separator, and a perforated central tube. After being bonded with sealant and fixed with end caps, it is spirally wound into shape. Spiral wound reverse osmosis membranes have a compact structure, a large effective membrane area per unit volume, are easy to manufacture and install, have high separation efficiency, and can retain more than 95% of impurities such as salt and organic matter. Moreover, they do not require heating for phase change, have low energy consumption and maintenance costs, and can be adapted to various water qualities and operating conditions by adjusting the membrane material and parameters.

[0003] Existing spiral wound reverse osmosis membranes have the disadvantages of being prone to scale buildup and inconvenient to clean. Calcium and magnesium ions, organic matter, etc. in the raw water are easy to deposit on the membrane surface to form scale, which clogs the membrane pores and reduces the separation efficiency. During descaling, the composite membrane sheet needs to be manually removed for cleaning, which increases the labor cost required for maintenance. Therefore, we propose a continuous treatment device for the harmless treatment of high-salt wastewater. Summary of the Invention

[0004] This invention provides a continuous high-salinity wastewater harmless treatment device, which can solve the disadvantages mentioned in the background art of the prior art, such as the easy accumulation of scale and inconvenient cleaning of spiral reverse osmosis membranes. Calcium and magnesium ions, organic matter and other substances in the raw water are easy to deposit on the membrane surface to form scale, which blocks the membrane pores and reduces the separation efficiency. During descaling, it is necessary to manually remove the composite membrane for cleaning, which increases the labor cost required for maintenance.

[0005] To achieve the above objectives, this solution provides a continuous high-salinity wastewater harmless treatment device, including a sleeve, a central tube inside the sleeve, a composite filter layer wound around the central tube, a flexible layer wrapped around the outer layer of the composite filter layer, a movable ring inside the sleeve, a pressure rod fixedly installed on the inner side of the movable ring, the pressure rod contacting the flexible layer, a slider installed on the side of the movable ring, a through groove opened on the side wall of the sleeve, the slider slidably installed in the through groove, a motor installed on the side of the sleeve, a lead screw connected to the output shaft of the motor, and the lead screw threadedly connected to the slider.

[0006] Optionally, a sealing ring is installed at the water inlet end of the sleeve, the inner wall of the sealing ring is sealed to the outermost layer of the composite filter layer, and a water inlet pipe is installed inside the sealing ring, the water inlet pipe being in contact with the middle layer of the composite filter layer.

[0007] Optionally, multiple pressure rods are provided, and the multiple pressure rods are distributed circumferentially on the inner wall of the moving ring. Rollers are rotatably mounted on the pressure rods, and the rollers are in extrusion contact with the flexible layer.

[0008] Optionally, the flexible layer is configured as a flexible absorbent cotton, and the two ends of the flexible layer are chamfered.

[0009] Optionally, a medicine bottle for holding citric acid is provided above the sleeve. The medicine bottle has a through hole at its bottom end, which is located directly above the flexible layer. The bottom surface of the medicine bottle is inclined, and the through hole is located at the lowest point of the bottom surface of the medicine bottle.

[0010] Optionally, a movable plate is slidably installed at the bottom of the medicine bottle, and a leakage groove is formed on the movable plate. When leakage occurs, the leakage groove communicates with the through hole.

[0011] Optionally, a leakage box is provided at the top of the movable ring, and a plurality of leakage holes are provided at the bottom of the leakage box. The leakage holes are located directly above the flexible layer. When the leakage box is located below the medicine bottle, the medicine bottle leaks medicine into the leakage box.

[0012] Optionally, a vertical plate is installed at one end of the movable plate, a reset spring is provided on one side of the vertical plate, and the other end of the reset spring is connected to the bottom end of the medicine bottle; a push plate is installed at one end of the medicine leakage box, the push plate is a rubber plate, and after the push plate abuts against the vertical plate, the medicine leakage groove communicates with the through hole.

[0013] Optionally, a fixing ring is provided at the outlet end of the sleeve, and a tension ring is rotatably installed on the fixing ring. The inner side of the tension ring is fixedly connected to the outermost end of the composite filter layer. A torsion spring is provided inside the fixing ring, with one end of the torsion spring connected to the fixing ring and the other end of the torsion spring connected to the tension ring.

[0014] Optionally, a pull rod is slidably inserted on the fixing ring, the pull rod is inserted into the slider, an abutment plate is installed at the other end of the pull rod near the tension ring, and an abutment block is installed at the other end of the pull rod; A lever is installed on the side of the tension ring, and the edge of the abutment block is inclined. When the inclined edge of the abutment block abuts against the lever, the tension ring rotates.

[0015] The above technical solution provides a continuous high-salinity wastewater harmless treatment device that, when in use: 1. The rollers indirectly apply pressure to the composite filter layer through the flexible layer to prevent damage to the surface of the composite filter layer. After the composite filter layer is pressurized, the raw water channel inside the composite filter layer changes from a straight line to a curve, which increases the impact force of the raw water on the raw water channel inside the composite filter layer. This prevents calcium and magnesium ions, organic matter, etc. in the raw water from accumulating in large quantities on the surface of the composite filter layer, ensuring the permeability of the composite filter layer, reducing the disassembly and maintenance cycle of the composite filter layer, and reducing the labor cost required for maintenance.

[0016] 2. As the rollers roll and squeeze the flexible layer, the water content of the flexible layer decreases. The medicine in the leakage box drips into the flexible layer through the leakage holes and is quickly absorbed by the flexible layer. As the leakage box moves, the medicine is evenly dripped into the flexible layer. Since the flexible layer wraps around the outside of the composite filter layer, the citric acid medicine inside the flexible layer continues to diffuse into the composite filter layer, dissolving the calcium and magnesium ion deposits between the composite filter layers and preventing the large-scale deposition of calcium and magnesium ions.

[0017] 3. The tension ring drives the composite filter layer to rotate, changing the composite filter layer from a normally tight state to a relaxed state. The gap between the composite filter layers increases, increasing the cross-sectional area of ​​the raw water channel between the composite filter layers. This facilitates full contact between the raw water and the flexible layer, and accelerates the diffusion of citric acid agent in the flexible layer into the composite filter layer.

[0018] Other features and advantages of this solution will be described in detail in the following detailed implementation section. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the internal structure of the sleeve of the present invention.

[0020] Figure 2 This is a schematic diagram of the groove structure of the present invention.

[0021] Figure 3 This is a schematic diagram of the moving ring structure of the present invention.

[0022] Figure 4 Appendix to this invention Figure 3 A magnified structural diagram of point A in the middle.

[0023] Figure 5 This is a cross-sectional structural diagram of the medicine leakage box of the present invention.

[0024] Figure 6 Appendix to this invention Figure 5 A magnified structural diagram at point B in the middle.

[0025] Figure 7 Appendix to this invention Figure 5A magnified structural diagram at point C.

[0026] Figure 8 Appendix to this invention Figure 3 A magnified structural diagram at point D.

[0027] Figure 9 This is a schematic diagram of the installation structure of the contact plate and the contact block of the present invention.

[0028] Figure 10 This is an exploded structural diagram of the fixing ring and the loosening ring of the present invention.

[0029] Figure 11 This is a schematic diagram of the connection structure between the elastic ring and the composite filter layer of the present invention.

[0030] Explanation of reference numerals in the attached drawings: 101, sleeve; 102, central tube; 103, composite filter layer; 201, flexible layer; 202, moving ring; 203, pressure rod; 204, slider; 205, through groove; 206, motor; 207, lead screw; 208, sealing ring; 209, water inlet pipe; 210, roller; 301, medicine bottle; 302, through hole; 303, moving plate; 304, medicine leakage trough; 305, medicine leakage box; 306, medicine leakage hole; 307, vertical plate; 308, reset spring; 309, push plate; 401, fixed ring; 402, tension ring; 403, torsion spring; 404, pull rod; 405, contact plate; 406, lever plate; 407, contact block. Detailed Implementation

[0031] To make the aforementioned objectives, features, and advantages of this solution more apparent and understandable, the specific embodiments of this solution are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this solution. However, this solution can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this solution. Therefore, this solution is not limited to the specific embodiments disclosed below.

[0032] In the description of this solution, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this solution and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this solution. The terms "first" and "second" are used to distinguish one element from another and do not have sequential or importance. Furthermore, in the following description, when referring to the accompanying drawings, the same reference numerals in different drawings indicate the same or similar elements, which will not be repeated here.

[0033] In this solution, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this solution based on the specific circumstances.

[0034] According to some embodiments of this solution, a continuous high-salinity wastewater harmless treatment device is provided, for reference. Figures 1 to 11 As shown, the continuous high-salinity wastewater harmless treatment device includes a sleeve 101, inside which is a central tube 102. A composite filter layer 103 is wound around the central tube 102. The composite filter layer 103 includes a set of filter layers, in which a water flow channel mesh layer and a support layer are provided. A flexible layer 201 is wrapped around the outer layer of the composite filter layer 103. After the composite filter layer 103 is wound around the central tube 102, the flexible layer 201 is fixedly installed on the periphery of the composite filter layer 103 with glue. It should be noted that the function of the flexible layer 201 is to... The pressure is moderated to prevent abrupt changes in the properties of the composite filter layer 103, achieving a flexible pressure effect. A movable ring 202 is provided inside the sleeve 101, and a pressure rod 203 is fixedly installed on the inner side of the movable ring 202. The pressure rod 203 contacts the flexible layer 201. A slider 204 is installed on the side of the movable ring 202. A through groove 205 is opened on the side wall of the sleeve 101, and the slider 204 is slidably installed in the through groove 205. A motor 206 is provided on the side of the sleeve 101, and a lead screw 207 is connected to the output shaft of the motor 206. The lead screw 207 is threadedly connected to the slider 204.

[0035] Thus, motor 206 starts periodically, driving slider 204 to slide in slot 205 via lead screw 207. Simultaneously, moving ring 202 moves, and pressure rod 203 inside moving ring 202 compresses flexible layer 201. Pressure rod 203 indirectly applies pressure to composite filter layer 103 through flexible layer 201, preventing damage to the surface of composite filter layer 103. Under pressure, the raw water channel inside composite filter layer 103 changes from a straight line to a curve (the curved part is the pressure-bearing part of composite filter layer 103), increasing the impact force of raw water on the raw water channel inside composite filter layer 103, preventing the accumulation of calcium and magnesium ions, organic matter, etc., on the surface of composite filter layer 103. It should be noted that if the channel flattens when compressed, reducing the cross-sectional area of ​​the channel and increasing the raw water pressure, it has a positive impact on both filtration and decontamination.

[0036] Please refer to the following: Figure 5 , Figure 6 A sealing ring 208 is installed at the inlet end of the sleeve 101. The inner wall of the sealing ring 208 is sealed to the outermost layer of the composite filter layer 103. An inlet pipe 209 is installed inside the sealing ring 208. The inlet pipe 209 contacts the middle layer of the composite filter layer 103. In this device, the outlet end of the sleeve 101 is open. The high-salt wastewater flowing into the inlet pipe 209 enters through the middle layer of the composite filter layer 103, preventing the raw water from flowing out through the outermost layer of the composite filter layer 103 without sufficient filtration. When the high-salt wastewater enters through the middle layer of the composite filter layer 103, the path of the high-salt wastewater to the outermost layer of the composite filter layer 103 is increased, ensuring that the outermost layer of the composite filter layer 103 is fully filtered.

[0037] Specifically, multiple pressure rods 203 are provided, and the multiple pressure rods 203 are distributed circumferentially on the inner wall of the moving ring 202. Rollers 210 are rotatably mounted on the pressure rods 203. The rollers 210 are pressed into contact with the flexible layer 201. The rollers 210 are used to roll the flexible layer 201 to prevent frictional wear of the flexible layer 201.

[0038] It should be noted that the composite filter layer 103 includes a set of filter layers, in which a water production channel mesh layer and a support layer are provided. The filter layer is an aromatic polyamide membrane. The aromatic polyamide membrane has a dense cross-linked structure that can intercept more than 99% of ions, bacteria, organic matter and salt in the water, allowing only water molecules to pass through.

[0039] The permeate flow channel mesh layer is made of polypropylene (PP) or polyester (PET) mesh material. The permeate flow channel mesh layer forms a flow channel for permeate on the inner side of the membrane leaf, collecting the pure water (permeate) that has passed through the separation layer and guiding it to the central permeate pipe. At the same time, it separates adjacent membrane leaves to prevent membrane sheets from sticking together and causing permeate to be unable to flow out. The support layer is a porous ultrafiltration membrane made of polysulfone (PSF) or polyethersulfone (PES). The support layer provides mechanical support for the surface polyamide to prevent the active layer from being crushed under high pressure. At the same time, it serves as a flow channel for water molecules, allowing water molecules that have passed through the active layer to quickly enter the permeate flow channel. In addition, after the composite filter layer 103 is wound on the central tube 102, a raw water flow channel mesh layer is also provided between the layers of the composite filter layer 103. The raw water flow channel mesh layer is also a mesh structure made of polypropylene (PP) or polyester (PET), and the pore size of the raw water flow channel mesh layer is larger than that of the product water flow channel mesh layer. The raw water flow channel mesh layer forms a uniform water flow channel on the surface of the membrane element, allowing the raw water to flow smoothly across the membrane surface, avoiding local concentration polarization, and protecting the surface of the reverse osmosis membrane from being scratched by particles in the raw water. The composite filter layer 103 (filter layer + water flow channel mesh layer + support layer) is sealed with glue around its perimeter, so that the filter layer completely wraps and seals the water flow channel mesh layer to prevent short circuit between raw water and product water. Several water passage holes are opened on the central tube 102, which are connected to the filter layer. The composite filter layer 103 is wound around the central tube 102. Holes aligned with the water passage holes are opened on the composite filter layer 103. The composite filter layer 103 is glued and sealed to the central tube 102 around the holes, so that the purified water in the water flow channel mesh layer enters the central tube 102. The specific structure of the composite filter layer 103 is prior art. The structure and principle involved in the manufacture and winding of the composite filter layer 103 are well known to those skilled in the art and will not be described in detail here.

[0040] In some embodiments of this solution, the flexible layer 201 is configured as flexible absorbent cotton. Specifically, the flexible layer 201 can be made of pure cotton or a blend of polyester and viscose fibers. Both ends of the flexible layer 201 are chamfered. (Refer to...) Figure 5 As shown, a medicine bottle 301 for holding citric acid is provided above the sleeve 101. A through hole 302 is provided at the bottom of the medicine bottle 301. The through hole 302 is located directly above the flexible layer 201. The bottom surface of the medicine bottle 301 is inclined, and the through hole 302 is located at the lowest point of the bottom surface of the medicine bottle 301.

[0041] Additionally, please refer to Figure 7 A movable plate 303 is slidably installed at the bottom of the medicine bottle 301. A medicine leakage groove 304 is provided on the movable plate 303. When medicine leaks, the medicine leakage groove 304 is connected to the through hole 302.

[0042] For details, please refer to Figure 8The top of the moving ring 202 is provided with a medicine leakage box 305. The bottom of the medicine leakage box 305 is provided with multiple medicine leakage holes 306. The medicine leakage holes 306 are located directly above the flexible layer 201. When the medicine leakage box 305 is located below the medicine bottle 301, the medicine bottle 301 leaks medicine into the medicine leakage box 305.

[0043] A vertical plate 307 is installed at one end of the movable plate 303. A reset spring 308 is provided on one side of the vertical plate 307. The other end of the reset spring 308 is connected to the bottom of the medicine bottle 301. A push plate 309 is installed at one end of the medicine box 305. The push plate 309 is a rubber plate. After the push plate 309 abuts against the vertical plate 307, the medicine leakage groove 304 is connected to the through hole 302.

[0044] Therefore, under normal conditions, the moving ring 202 is positioned adjacent to the medicine bottle 301. When the moving ring 202 needs to move, it drives the leakage box 305 to move. When the leakage box 305 moves directly below the medicine bottle 301, the push plate 309 in the leakage box 305 abuts against the vertical plate 307. The vertical plate 307 drives the moving plate 303 to move, so that the leakage groove 304 on the moving plate 303 connects with the through hole 302. The citric acid solution in the medicine bottle 301 falls into the leakage box 305 through the through hole 302 and the leakage groove 304. Due to the roller 210's action on the flexible... The flexible layer 201 is rolled and squeezed, which reduces the water content of the flexible layer 201. The medicine in the medicine leakage box 305 drips into the flexible layer 201 through the medicine leakage hole 306 and is quickly absorbed by the flexible layer 201. As the medicine leakage box 305 moves, the medicine is evenly dripped into the flexible layer 201. Since the flexible layer 201 is wrapped around the outside of the composite filter layer 103, the citric acid medicine inside the flexible layer 201 continues to diffuse into the composite filter layer 103 (molecular thermal motion), dissolving the calcium and magnesium ion deposits between the composite filter layers 103 and preventing the large-scale deposition of calcium and magnesium ions.

[0045] In some implementations of this solution, reference is made to Figures 9 to 11 As shown, a fixing ring 401 is provided at the outlet end of the sleeve 101, and a tension ring 402 is rotatably installed on the fixing ring 401. The inner side of the tension ring 402 is fixedly connected to the outermost end of the composite filter layer 103. A torsion spring 403 is provided inside the fixing ring 401. One end of the torsion spring 403 is connected to the fixing ring 401, and the other end of the torsion spring 403 is connected to the tension ring 402.

[0046] A pull rod 404 is slidably inserted on the fixed ring 401. The pull rod 404 is inserted into the slider 204. A contact plate 405 is installed at the other end of the pull rod 404 near the tension ring 402. A contact block 407 is installed at the other end of the pull rod 404. A lever plate 406 is installed on the side of the tension ring 402. The edge of the contact block 407 is inclined. When the inclined edge of the contact block 407 contacts the lever plate 406, the tension ring 402 rotates.

[0047] Through the above technical solution, the continuous high-salt wastewater harmless treatment device provided by this solution, when in use, the motor 206 drives the slider 204 to slide in the groove 205 through the lead screw 207, and at the same time the moving ring 202 moves. The roller 210 on the pressure rod 203 rolls and squeezes the flexible layer 201. The roller 210 indirectly applies pressure to the composite filter layer 103 through the flexible layer 201 to prevent damage to the surface of the composite filter layer 103. After the composite filter layer 103 is pressed, the raw water channel on the inner side of the composite filter layer 103 changes from a straight line to a curve, which increases the impact force of the raw water on the raw water channel on the inner side of the composite filter layer 103. This prevents calcium and magnesium ions, organic matter, etc. in the raw water from accumulating in large quantities on the surface of the composite filter layer 103, ensuring the water permeability of the composite filter layer 103, reducing the disassembly and maintenance cycle of the composite filter layer 103, and reducing the labor cost required for maintenance.

[0048] Furthermore, under normal conditions, when the moving ring 202 is not moving, the slider 204 on the moving ring 202 abuts against the contact block 407 at the end of the pull rod 404, and the inclined side of the contact block 407 abuts against the lever 406. The torsion spring 403 inside the fixed ring 401 twists, and the composite filter layer 103 is in a normally tightened state. After the moving ring 202 moves, the slider 204 on the moving ring 202 loses contact with the contact block 407 at the end of the pull rod 404, the torsion spring 403 is released, the tension ring 402 rotates, and the tension ring 402 drives the composite filter layer 103 to rotate. The composite filter layer 103 changes from a normally tightened state to a relaxed state, the gap between the layers of the composite filter layer 103 increases, and the cross-sectional area of ​​the raw water channel between the composite filter layers 103 increases, which is conducive to the full contact between the raw water and the flexible layer 201 and accelerates the diffusion of citric acid agent in the flexible layer 201 into the composite filter layer 103.

[0049] The preferred embodiments of this solution have been described in detail above with reference to the accompanying drawings. However, this solution is not limited to the specific details in the above embodiments. Within the scope of the technical concept of this solution, various simple modifications can be made to the technical solution, and these simple modifications all fall within the protection scope of this solution.

[0050] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this solution will not describe the various possible combinations separately.

[0051] Furthermore, various implementations of this solution can be combined in any way, as long as they do not violate the spirit of this solution, they should also be regarded as the content disclosed in this solution.

Claims

1. A continuous high-salinity wastewater harmless treatment device, comprising a casing (101), wherein a central tube (102) is disposed inside the casing (101), and a composite filter layer (103) is wound on the central tube (102), characterized in that: The composite filter layer (103) is wrapped with a flexible layer (201) on the outside. A movable ring (202) is provided inside the sleeve (101). A pressure rod (203) is fixedly installed on the inner side of the movable ring (202). The pressure rod (203) is in contact with the flexible layer (201). A slider (204) is installed on the side of the movable ring (202). A through groove (205) is opened on the side wall of the sleeve (101). The slider (204) is slidably installed in the through groove (205). A motor (206) is provided on the side of the sleeve (101). A lead screw (207) is connected to the output shaft of the motor (206). The lead screw (207) is threadedly connected to the slider (204). Multiple pressure rods (203) are provided, and the multiple pressure rods (203) are distributed circumferentially on the inner wall of the moving ring (202). Rollers (210) are rotatably mounted on the pressure rods (203), and the rollers (210) are in extrusion contact with the flexible layer (201). A fixing ring (401) is provided at the outlet end of the sleeve (101). A tension ring (402) is rotatably installed on the fixing ring (401). The inner side of the tension ring (402) is fixedly connected to the outermost end of the composite filter layer (103). A torsion spring (403) is provided inside the fixing ring (401). One end of the torsion spring (403) is connected to the fixing ring (401), and the other end of the torsion spring (403) is connected to the tension ring (402).

2. The continuous high-salinity wastewater harmless treatment device according to claim 1, characterized in that: A sealing ring (208) is installed at the water inlet end of the sleeve (101). The inner wall of the sealing ring (208) is sealed to the outermost layer of the composite filter layer (103). A water inlet pipe (209) is installed inside the sealing ring (208). The water inlet pipe (209) is in contact with the middle layer of the composite filter layer (103).

3. The continuous high-salinity wastewater harmless treatment device according to claim 1, characterized in that: The flexible layer (201) is configured as a flexible absorbent cotton, and the two ends of the flexible layer (201) are chamfered.

4. The continuous high-salinity wastewater harmless treatment device according to claim 3, characterized in that: A medicine bottle (301) for holding citric acid is provided above the sleeve (101). A through hole (302) is provided at the bottom of the medicine bottle (301). The through hole (302) is located directly above the flexible layer (201). The bottom surface of the medicine bottle (301) is inclined, and the through hole (302) is located at the lowest point of the bottom surface of the medicine bottle (301).

5. The continuous high-salinity wastewater harmless treatment device according to claim 4, characterized in that: A movable plate (303) is slidably installed at the bottom of the medicine bottle (301). A medicine leakage groove (304) is provided on the movable plate (303). When medicine is leaking, the medicine leakage groove (304) is connected to the through hole (302).

6. The continuous high-salinity wastewater harmless treatment device according to claim 5, characterized in that: The top of the moving ring (202) is provided with a medicine leakage box (305), and the bottom of the medicine leakage box (305) is provided with a plurality of medicine leakage holes (306). The medicine leakage holes (306) are located directly above the flexible layer (201). When the medicine leakage box (305) is located below the medicine bottle (301), the medicine bottle (301) leaks medicine into the medicine leakage box (305).

7. The continuous high-salinity wastewater harmless treatment device according to claim 6, characterized in that: A vertical plate (307) is installed at one end of the movable plate (303), and a reset spring (308) is provided on one side of the vertical plate (307). The other end of the reset spring (308) is connected to the bottom end of the medicine bottle (301). A push plate (309) is installed at one end of the medicine box (305). The push plate (309) is a rubber plate. After the push plate (309) abuts against the vertical plate (307), the medicine leakage groove (304) communicates with the through hole (302).

8. The continuous high-salinity wastewater harmless treatment device according to claim 1, characterized in that: A pull rod (404) is slidably inserted on the fixed ring (401). The pull rod (404) is inserted into the slider (204). An abutment plate (405) is installed at the other end of the pull rod (404) near the tension ring (402). An abutment block (407) is installed at the other end of the pull rod (404). A lever (406) is installed on the side of the tension ring (402), and the edge of the abutment block (407) is inclined. When the inclined edge of the abutment block (407) abuts against the lever (406), the tension ring (402) rotates.

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