A modified membrane separation device for reducing the concentration of organic pollutants in high-salinity wastewater

Abstract

This invention discloses a modified membrane separation device for reducing the concentration of organic pollutants in high-salinity wastewater, comprising a shell, an upper modified membrane, and a lower modified membrane. The interior of the shell is divided into an inlet chamber, an adsorption chamber, and a collection chamber from top to bottom. A wastewater tank is located at the top of the shell, and a motor and an outlet pipe are located on the side wall of the shell. A filter plate is located above the upper modified membrane, and a sliding assembly is located on the shell. A liquid bladder is located on the filter plate. A stirring rod is located inside the adsorption chamber, and a driving assembly is located on the stirring rod. A cleaning assembly is located between the filter plate and the upper modified membrane. This invention improves membrane separation efficiency by intermittently introducing high-salinity wastewater into the device, first performing filtration membrane separation, then adsorption membrane separation, and simultaneously cleaning the membrane surface during the stirring and anti-clogging process of the high-salinity wastewater.

Description

Technical Field

[0001] This invention relates to the field of membrane separation technology, specifically to a modified membrane separation device for reducing the concentration of organic pollutants in high-salt wastewater. Background Technology

[0002] The types and chemical properties of organic matter in high-salinity organic wastewater vary considerably depending on the production process, but the salts it contains are mostly Cl. - SO4 2- Na + Ca 2+ Salts and other ions. While these ions are essential nutrients for microbial growth, playing a crucial role in promoting enzyme reactions, maintaining membrane balance, and regulating osmotic pressure, excessively high concentrations can inhibit and harm microorganisms. This manifests primarily as: high salt concentration and high osmotic pressure leading to protoplasmic separation due to microbial cell dehydration; reduced dehydrogenase activity due to salting out; the toxicity of high chloride ion concentrations to bacteria; and increased wastewater density due to high salt concentrations, causing activated sludge to float and be lost, thus severely impacting the purification efficiency of biological treatment systems.

[0003] Membrane separation technology is commonly used to reduce the concentration of organic pollutants in high-salinity wastewater. However, existing membrane separation equipment typically only allows all high-salinity wastewater to pass through the equipment for single or multiple membrane separations, which can easily cause clogging and lead to the accumulation of deposits on the membrane surface, thus affecting the membrane separation effect.

[0004] Therefore, this invention designs a modified membrane separation device to reduce the concentration of organic pollutants in high-salt wastewater to solve the above problems. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a modified membrane separation device for reducing the concentration of organic pollutants in high-salt wastewater.

[0006] The technical solution of the present invention is: a modified membrane separation device for reducing the concentration of organic pollutants in high-salt wastewater, comprising a shell and an upper modified membrane and a lower modified membrane arranged horizontally and sealed to the inner wall of the shell; the upper modified membrane and the lower modified membrane divide the interior of the shell into an inlet chamber, an adsorption chamber and a collection chamber from top to bottom;

[0007] The top of the shell is equipped with a wastewater tank, the side wall of the shell is equipped with a motor, the side wall of the shell located in the water collection chamber is equipped with a liquid outlet pipe, and the liquid outlet pipe is equipped with a first switch valve;

[0008] A filter plate is provided above the modified membrane and is slidably and sealed to the inner wall of the housing. A first sliding component is provided on the side wall of the housing opposite to the motor. A through hole is provided on the side wall of the housing for the first sliding component to slide up and down. A liquid bladder is provided on the filter plate and is connected to the wastewater tank.

[0009] The first sliding assembly includes a sliding plate that is slidably disposed in the cavity and slidably sealed to the cavity, and a slider that is fixedly connected to one side of the sliding plate, and the other side of the sliding plate is fixedly connected to a connecting block provided on the filter plate;

[0010] The adsorption chamber is equipped with a stirring rod with one end connected to the motor output end, and the other end of the stirring rod passes through the side wall of the shell and is equipped with a driving component for driving the slider to slide up and down.

[0011] A cleaning assembly is provided between the filter plate and the upper modified membrane. The cleaning assembly includes a fixed rod and a plurality of brush rods distributed in a ring on the fixed rod. The fixed rod is connected to the filter plate. One end of the brush rod is hinged to the fixed rod, and the other end of the brush rod makes frictional contact with the upper modified membrane through a brush head.

[0012] Furthermore, the drive assembly includes a first transmission rod, a second transmission rod, and a third transmission rod, one end of which is sleeved with the stirring rod. The other end of the first transmission rod is hinged to one end of the second transmission rod, and the other end of the second transmission rod is hinged to one end of the third transmission rod. The other end of the third transmission rod is slidably connected to a vertical groove provided on the side wall of the housing, and the third transmission rod is fixedly connected to the slider.

[0013] Note: The above-mentioned drive assembly converts the rotation of the stirring rod into the up-and-down drive of the slider. The structure is simple and easy to implement, and no additional lifting motor is required.

[0014] Furthermore, a backflush airbag is provided on the side wall of the housing located in the water collection cavity, which is connected to the inside of the water collection cavity through a backflush air pipe. The bottom of the backflush airbag is provided with a second support plate fixedly connected to the side wall of the housing, and the top of the backflush airbag is in contact with one end of the third transmission rod for transmission.

[0015] Explanation: By setting up a backflush airbag, the backflush airbag can be squeezed and restored during the transmission of the third transmission rod, thereby impacting the lower surface of the lower modified membrane with airflow, realizing the backflush cleaning of the lower modified membrane, and impacting the water droplets gathered and attached to the lower modified membrane into the water collection chamber for collection.

[0016] Furthermore, a second sliding assembly is provided on the housing sidewall adjacent to the first sliding assembly, and a medicine box is provided on the housing sidewall located above the motor. The medicine box is an elastic capsule, and a first support plate is provided at the bottom of the medicine box and fixedly connected to the housing sidewall.

[0017] The reagent box is connected to the adsorption chamber through a drug transfer tube, and a drive rod fixedly connected to the slider is provided on the top of the reagent box.

[0018] Explanation: The first sliding component moves the filter plate up and down, which in turn causes the filter plate to simultaneously move the second sliding component up and down to press the reagent tank, thus achieving intermittent dosing of the adsorption chamber.

[0019] Furthermore, a reflux pipe is provided on the side wall of the shell located in the water collection cavity, with one end communicating with the inside of the water collection cavity. The other end of the reflux pipe penetrates the side wall of the adsorption cavity and is provided with a liquid outlet. The liquid outlet faces the upper modified membrane and is provided with a suction pump.

[0020] One end of the drug delivery tube is connected to the medicine tank, and the other end of the drug delivery tube is provided with a drug outlet facing downward towards the modified membrane. A sliding rod is provided between the drug delivery tube and the return tube. The two ends of the sliding rod extend into the drug delivery tube and the return tube respectively, and are used to control the drug outlet and liquid outlet to open alternately by moving the sliding rod left and right.

[0021] Explanation: By applying pressure to the sliding rod from the reagent tank, the reagent can be intermittently added to the adsorption chamber while water is drawn from the water collection chamber. This serves two purposes: backflushing and cleaning the modified membrane and performing secondary adsorption treatment on the water in the collection chamber, thereby improving membrane separation efficiency.

[0022] Furthermore, the sliding rod is provided with a first lever, and a pneumatic assembly is provided on each side of the first lever. The pneumatic assembly includes a first airbag and an air guide tube arranged laterally, a second airbag arranged longitudinally on the air guide tube and communicating with the air guide tube, and a cleaning rod fixedly connected to the second airbag and used to scrape the inner wall of the adsorption chamber. One end of the first airbag is fixedly connected to the first lever, and the other end of the first airbag is connected to the air guide tube, and the air guide tube is fixedly connected to the inner wall of the adsorption chamber.

[0023] Explanation: By converting the left and right movement of the sliding rod into the extension and retraction of the first and second airbags, the cleaning rod is driven to clean the inner wall of the adsorption chamber, removing residual water and stains adhering to the inner wall of the adsorption chamber.

[0024] Furthermore, the sliding rod is provided with a second lever, and the second lever is provided with a scraper that rubs against the upper modified film.

[0025] Explanation: The sliding rod drives the scraper to move left and right synchronously, scraping the lower surface of the upper modified membrane. This collects the water droplets that accumulate on the lower modified membrane into the adsorption chamber, reducing the probability of blockage of the lower modified membrane and improving membrane separation efficiency.

[0026] Furthermore, a circulation pipe is provided on the side wall of the shell located in the water collection cavity. One end of the circulation pipe is connected to the inside of the water collection cavity, and the other end of the circulation pipe is connected to the water inlet cavity.

[0027] The wastewater tank is equipped with a water level sensor and a controller, and the circulation pipe is equipped with a second switching valve. Both the water level sensor and the second switching valve are electrically connected to the controller.

[0028] Note: When the water level sensor detects that the high-salt wastewater in the wastewater tank is almost empty, the water in the collection chamber is introduced into the inlet chamber through the circulation pipe for circulation filtration, thereby improving the membrane separation efficiency.

[0029] Furthermore, a threaded rod is vertically and fixedly connected to the upper modified membrane, the inner wall of the fixed rod is threadedly sleeved with the threaded rod, and the fixed rod is rotatably connected to the filter plate.

[0030] Explanation: By setting a threaded rod, the fixed rod can rotate synchronously as it rises and falls with the filter plate, thereby expanding the cleaning range and stirring the high-salt wastewater, thus improving the membrane separation efficiency.

[0031] Furthermore, the brush rod sidewall is provided with a spring that is fixedly connected to the sidewall of the fixed rod.

[0032] Note: By incorporating a spring, the efficiency of the brush rod during its upward retraction is improved.

[0033] The beneficial effects of this invention are:

[0034] (1) The membrane separation device of the present invention performs two membrane separations. Before the first membrane separation, filtration is performed. During the second membrane separation, the agent is adsorbed. Adsorbent is intermittently added to the high-salt wastewater while stirring, thereby improving the efficiency of membrane separation.

[0035] (2) The membrane separation device of the present invention intermittently absorbs and releases high-salt wastewater through the liquid bladder, replenishing the high-salt wastewater in the inlet chamber in small amounts and multiple times, preventing a large amount of high-salt wastewater from causing blockage in the inlet chamber, and simultaneously driving the cleaning component to clean the modified membrane, preventing pollutants from accumulating on the modified membrane and causing blockage, thereby improving the efficiency of membrane separation. Attached Figure Description

[0036] Figure 1 This is an overall appearance view of Embodiment 1 of the membrane separation device of the present invention;

[0037] Figure 2 This is an overall appearance view of Embodiment 1 of the membrane separation device of the present invention;

[0038] Figure 3 This is an internal structural diagram of Embodiment 1 of the membrane separation device of the present invention;

[0039] Figure 4 This is a structural diagram of the cleaning component of Embodiment 1 of the membrane separation device of the present invention;

[0040] Figure 5This is an overall appearance view of Embodiment 2 of the membrane separation device of the present invention;

[0041] Figure 6 This is an internal structural diagram of Embodiment 2 of the membrane separation device of the present invention;

[0042] Figure 7 This is an internal structural diagram of Embodiment 3 of the membrane separation device of the present invention;

[0043] Figure 8 This is a structural diagram of the scraper of Embodiment 3 of the membrane separation device of the present invention;

[0044] Wherein, 1-shell, 11-upper modified membrane, 12-lower modified membrane, 13-wastewater tank, 14-vertical chute, 2-inlet chamber, 21-filter plate, 211-sliding plate, 212-sliding block, 22-liquid bladder, 23-fixed rod, 24-brush rod, 25-threaded rod, 3-adsorption chamber, 31-reagent tank, 311-first support plate, 312-drive rod, 32-drug transfer tube, 321-drug outlet, 33-motor, 34-stirring rod, 341 - First transmission rod, 342 - Second transmission rod, 343 - Third transmission rod, 35 - Sliding rod, 351 - First lever, 352 - First airbag, 353 - Second airbag, 354 - Cleaning rod, 355 - Second lever, 356 - Scraper, 357 - Air guide tube, 4 - Water collection chamber, 41 - Liquid outlet tube, 42 - Return tube, 421 - Liquid outlet, 43 - Circulation tube, 44 - Backflush airbag, 441 - Second support plate, 442 - Backflush air tube. Detailed Implementation

[0045] The present invention will now be described in more detail with reference to specific embodiments, so as to better demonstrate the advantages of the present invention.

[0046] Example 1

[0047] A modified membrane separation device for reducing the concentration of organic pollutants in high-salinity wastewater, such as Figure 3 As shown, it includes a housing 1 and an upper modified membrane 11 and a lower modified membrane 12 arranged laterally and sealed to the inner wall of the housing 1; the upper modified membrane 11 and the lower modified membrane 12 divide the interior of the housing 1 into a water inlet chamber 2, an adsorption chamber 3 and a water collection chamber 4 from top to bottom.

[0048] like Figure 3 As shown, a wastewater tank 13 is provided on the top of the housing 1, a motor 33 is provided on the side wall of the housing 1, and an outlet pipe 41 is provided on the side wall of the housing 1 located in the water collection chamber 4. A first switch valve is provided on the outlet pipe 41.

[0049] like Figure 3As shown, a filter plate 21 is provided above the modified membrane 11 and is slidably and sealed to the inner wall of the housing 1. A first sliding assembly is provided on the side wall of the housing 1 opposite to the motor 33. A through hole is provided on the side wall of the housing 1 for the first sliding assembly to slide up and down. A cavity is provided in the side wall of the housing 1 located at the through hole. A liquid bladder 22 communicating with the wastewater tank 13 is provided on the filter plate 21.

[0050] like Figure 1 and Figure 2 As shown, the first sliding assembly includes a sliding piece 211 that is slidably disposed in the cavity and slidably sealed to the cavity, and a slider 212 that is fixedly connected to one side of the sliding piece 211. The other side of the sliding piece 211 is fixedly connected to a connecting block provided on the filter plate 21.

[0051] like Figure 3 As shown, the adsorption chamber 3 is provided with a stirring rod 34, one end of which is connected to the output end of the motor 33. The other end of the stirring rod 34 passes through the side wall of the housing 1 and is provided with a driving component for driving the slider 212 to slide up and down.

[0052] like Figure 1 As shown, the drive assembly includes a first transmission rod 341, a second transmission rod 342, and a third transmission rod 343, one end of which is sleeved with the stirring rod 34. The other end of the first transmission rod 341 is hinged to one end of the second transmission rod 342, and the other end of the second transmission rod 342 is hinged to one end of the third transmission rod 343. The other end of the third transmission rod 343 is slidably connected to a vertical slide groove 14 provided on the side wall of the housing 1, and the third transmission rod 343 is fixedly connected to the slider 212.

[0053] like Figure 3 and Figure 4 As shown, a cleaning assembly is provided between the filter plate 21 and the upper modified membrane 11. The cleaning assembly includes a fixed rod 23 and a plurality of brush rods 24 arranged in a ring on the fixed rod 23. The fixed rod 23 is connected to the filter plate 21. One end of the brush rod 24 is hinged to the fixed rod 23, and the other end of the brush rod 24 is in frictional contact with the upper modified membrane 11 through a brush head. A spring 241 is provided on the side wall of the brush rod 24 and is fixedly connected to the side wall of the fixed rod 23.

[0054] like Figure 3 As shown, the upper modified membrane 11 is provided with a threaded rod 25 fixedly connected to one end thereto, the inner wall of the fixing rod 23 is threadedly sleeved with the other end of the threaded rod 25, and the fixing rod 23 is rotatably connected to the filter plate 21;

[0055] like Figure 2As shown, a second sliding assembly is also provided on the side wall of the housing 1 adjacent to the first sliding assembly. The second sliding assembly has the same structure as the first sliding assembly. A medicine box 31 is provided on the side wall of the housing 1 above the motor 33. The medicine box 31 is an elastic capsule. A first support plate 311 is fixedly connected to the side wall of the housing 1 at the bottom of the medicine box 31.

[0056] like Figure 2 and Figure 3 As shown, the medicine box 31 is connected to the inside of the adsorption chamber 3 through the medicine transfer tube 32, and the top of the medicine box 31 is provided with a drive rod 312 that is fixedly connected to the slider 212.

[0057] The upper modified membrane 11, the lower modified membrane 12, the first switching valve, and the motor 33 are all commercially available equipment.

[0058] The working principle of the modified membrane separation device is as follows: When the motor 33 is started, the stirring rod 34 rotates, which in turn drives the first transmission rod 341 to rotate. This drives the second transmission rod 342 to drive the third transmission rod 343 to move the slider 212 up and down, thereby causing the filter plate 21 to slide up and down and squeeze the liquid bladder 22 to release the high-salt wastewater intermittently into the inlet chamber 2. While the filter plate 21 slides up and down, the fixed rod 23 moves up and down synchronously, and the brush rod 24 cleans the surface of the upper modified membrane 11 back and forth. At the same time, because the fixed rod 23 is threadedly connected to the threaded rod 25, the fixed rod 23 rotates while moving up and down, thereby stirring the high-salt wastewater in the inlet chamber 2 and expanding the cleaning range of the upper modified membrane 11.

[0059] Meanwhile, the slider 212 on the other side of the filter plate 21 drives the reagent tank 31 to extend and retract via the drive rod 312, thereby pressing the activated carbon in the reagent tank 31 into the adsorption chamber 3 through the drug transfer pipe 32 to adsorb pollutants in the high-salt wastewater; the high-salt wastewater after two membrane separations enters the water collection chamber 4, and the water after membrane treatment is transferred and collected through the liquid outlet pipe 41.

[0060] Example 2

[0061] The difference between this embodiment and Embodiment 1 is that, Figure 6 As shown, a return pipe 42 is provided on the side wall of the shell 1 located in the water collection cavity 4. One end of the return pipe 42 is connected to the inside of the water collection cavity 4. The other end of the return pipe 42 passes through the side wall of the adsorption cavity 3 and is provided with a liquid outlet 421. The liquid outlet 421 faces the modified membrane 11 and is provided with a suction pump.

[0062] like Figure 6As shown, one end of the drug delivery tube 32 is connected to the medicine tank 31, and the other end of the drug delivery tube 32 is provided with a drug outlet 321. The drug outlet 321 faces the modified membrane 12 downward. A sliding rod 35 is provided between the drug delivery tube 32 and the return tube 42. The two ends of the sliding rod 35 extend into the drug delivery tube 32 and the return tube 42 respectively, and are used to control the drug outlet 321 and the liquid outlet 421 to open alternately by moving the sliding rod 35 left and right. When the sliding rod 35 moves to close the drug outlet 321 and open the liquid outlet 421, the right end of the sliding rod 35 is 5cm away from the liquid outlet 421. When the sliding rod 35 moves to open the drug outlet 321 and close the liquid outlet 421, the left end of the sliding rod 35 is 5cm away from the drug outlet 321.

[0063] like Figure 5 As shown, a backflow airbag 44 is provided on the side wall of the housing 1 located in the water collection cavity 4 and communicates with the inside of the water collection cavity 4 through a backflow air pipe 442. The bottom of the backflow airbag 44 is provided with a second support plate 441 fixedly connected to the side wall of the housing 1, and the top of the backflow airbag 44 contacts and drives one end of the third transmission rod 343.

[0064] The difference between this embodiment and Embodiment 1 is that when the reagent tank 31 is squeezed, the sliding rod 35 moves to the right, thereby exposing the drug outlet 321 of the drug transfer tube 32, allowing activated carbon to enter the adsorption chamber 3, while blocking the liquid outlet 421 where the suction pump is located; when the reagent tank 31 is restored, the sliding rod 35 moves to the left, blocking the drug outlet 321 of the drug transfer tube 32, and exposing the liquid outlet 421 where the suction pump is located, drawing water from the water collection chamber 4 into the liquid outlet 421 to backwash and clean the modified membrane 11;

[0065] Furthermore, while the stirring rod 34 rotates, the backflush airbag 44 is contacted and extended by the third transmission rod 343, thereby backflushing and cleaning the lower modified membrane 12 through the backflush air pipe 442.

[0066] Example 3

[0067] The difference between this embodiment and embodiment 2 is that, Figure 7 and Figure 8 As shown, the sliding rod 35 is provided with a first lever 351. A pneumatic assembly is provided on each side of the first lever 351. The pneumatic assembly includes a first airbag 352 arranged laterally, a second airbag 353 arranged longitudinally, and a cleaning rod 354 arranged laterally. One end of the first airbag 352 is fixedly connected to the first lever 351, and the other end of the first airbag 352 is fixedly connected to the inner wall of the adsorption chamber 3. One end of the second airbag 353 communicates with the first airbag 352, and the other end of the second airbag 353 is fixedly connected to the cleaning rod 354. The cleaning rod 354 is provided with bristles for cleaning the inner wall of the adsorption chamber 3.

[0068] like Figure 8As shown, the sliding rod 35 is provided with a second lever 355, and the second lever 355 is provided with a scraper 356 that rubs against the upper modified film 11;

[0069] like Figure 7 As shown, a circulation pipe 43 is provided on the side wall of the housing 1 located in the water collection chamber 4. One end of the circulation pipe 43 is connected to the inside of the water collection chamber 4, and the other end of the circulation pipe 43 is connected to the water inlet chamber 2. A water level sensor and a controller are provided in the wastewater tank 13. A second switching valve is provided on the circulation pipe 43. The water level sensor and the second switching valve are both electrically connected to the controller. The water level sensor, the second switching valve and the controller are all commercially available equipment.

[0070] The difference between this embodiment and embodiment 2 is that while the sliding rod 35 moves left and right, it squeezes the first airbag 352 on one side, thereby expanding the second airbag 353 and driving the cleaning rod 354 downward to clean the inner wall of the adsorption chamber 3. The cleaning rod 354 on the other side cleans upward in the opposite direction. The sliding rod 35 also cleans the modified film 11 through the scraper 356.

[0071] When the water level sensor detects that the high-salt wastewater in the wastewater tank 13 has been discharged, the controller opens the second switch valve, thereby circulating and filtering the water in the water collection chamber 4 through the circulation pipe 43.

Claims

1. A modified membrane separation device for reducing the concentration of organic pollutants in high-salinity wastewater, characterized in that, It includes a shell (1) and an upper modified membrane (11) and a lower modified membrane (12) arranged laterally and sealed to the inner wall of the shell (1); the upper modified membrane (11) and the lower modified membrane (12) divide the interior of the shell (1) into a water inlet chamber (2), an adsorption chamber (3) and a water collection chamber (4) from top to bottom; The top of the housing (1) is provided with a wastewater tank (13), the side wall of the housing (1) is provided with a motor (33), the side wall of the housing (1) located in the water collection chamber (4) is provided with a liquid outlet pipe (41), and the liquid outlet pipe (41) is provided with a first switch valve; A filter plate (21) is provided above the modified membrane (11) and is slidably and sealed to the inner wall of the housing (1). A first sliding assembly is provided on the side wall of the housing (1) opposite to the motor (33). A through hole is provided on the side wall of the housing (1) for the first sliding assembly to slide up and down. A cavity is provided in the side wall of the housing (1) located at the through hole. A liquid bladder (22) communicating with the wastewater tank (13) is provided on the filter plate (21). The first sliding assembly includes a sliding plate (211) that is slidably disposed in the cavity and slidably sealed to the cavity, and a slider (212) that is fixedly connected to one side of the sliding plate (211). The other side of the sliding plate (211) is fixedly connected to a connecting block provided on the filter plate (21). The adsorption chamber (3) is provided with a stirring rod (34) with one end connected to the output end of the motor (33), and the other end of the stirring rod (34) passes through the side wall of the shell (1) and is provided with a driving component for driving the slider (212) to slide up and down; A cleaning assembly is provided between the filter plate (21) and the upper modified membrane (11). The cleaning assembly includes a fixed rod (23) and a plurality of brush rods (24) distributed in a ring on the fixed rod (23). The fixed rod (23) is connected to the filter plate (21). One end of the brush rod (24) is hinged to the fixed rod (23), and the other end of the brush rod (24) makes frictional contact with the upper modified membrane (11) through the brush head.

2. The modified membrane separation device for reducing the concentration of organic pollutants in high-salinity wastewater according to claim 1, characterized in that, The drive assembly includes a first transmission rod (341), a second transmission rod (342), and a third transmission rod (343) with one end sleeved with the stirring rod (34). The other end of the first transmission rod (341) is hinged to one end of the second transmission rod (342), and the other end of the second transmission rod (342) is hinged to one end of the third transmission rod (343). The other end of the third transmission rod (343) is slidably connected to a vertical groove (14) provided on the side wall of the housing (1), and the third transmission rod (343) is fixedly connected to the slider (212).

3. The modified membrane separation device for reducing the concentration of organic pollutants in high-salinity wastewater according to claim 2, characterized in that, A backflush airbag (44) is provided on the side wall of the housing (1) located in the water collection cavity (4) and communicates with the inside of the water collection cavity (4) through a backflush air pipe (442). The bottom of the backflush airbag (44) is provided with a second support plate (441) fixedly connected to the side wall of the housing (1), and the top of the backflush airbag (44) is in contact with one end of the third transmission rod (343).

4. The modified membrane separation device for reducing the concentration of organic pollutants in high-salinity wastewater according to claim 1, characterized in that, A second sliding assembly is also provided on the side wall of the housing (1) adjacent to the first sliding assembly. The second sliding assembly has the same structure as the first sliding assembly. A medicine box (31) is provided on the side wall of the housing (1) above the motor (33). The medicine box (31) is an elastic capsule. A first support plate (311) is fixedly connected to the side wall of the housing (1) at the bottom of the medicine box (31). The medicine box (31) is connected to the inside of the adsorption chamber (3) through the medicine transfer tube (32), and the top of the medicine box (31) is provided with a drive rod (312) that is fixedly connected to the slider (212).

5. The modified membrane separation device for reducing the concentration of organic pollutants in high-salinity wastewater according to claim 4, characterized in that, A return pipe (42) with one end connected to the inside of the water collection chamber (4) is provided on the side wall of the shell (1) located in the water collection chamber (4). The other end of the return pipe (42) passes through the side wall of the adsorption chamber (3) and is provided with a liquid outlet (421). The liquid outlet (421) faces the upper modified membrane (11) and is provided with a suction pump. One end of the drug delivery tube (32) is connected to the medicine tank (31), and the other end of the drug delivery tube (32) is provided with a drug outlet (321). The drug outlet (321) faces the modified membrane (12) downward. A sliding rod (35) is provided between the drug delivery tube (32) and the return tube (42). The two ends of the sliding rod (35) are respectively inserted into the drug delivery tube (32) and the return tube (42) to control the drug outlet (321) and the liquid outlet (421) to open alternately by moving the sliding rod (35) left and right.

6. The modified membrane separation device for reducing the concentration of organic pollutants in high-salinity wastewater according to claim 5, characterized in that, The sliding rod (35) is provided with a first lever (351). A pneumatic assembly is provided on each side of the first lever (351). The pneumatic assembly includes a first airbag (352) and an air guide tube (357) arranged laterally, a second airbag (353) arranged longitudinally on the air guide tube (357) and communicating with the air guide tube (357), and a cleaning rod (354) fixedly connected to the second airbag (353) and used to scrape the inner wall of the adsorption chamber (3). One end of the first airbag (352) is fixedly connected to the first lever (351), and the other end of the first airbag (352) is connected to the air guide tube (357). The air guide tube (357) is fixedly connected to the inner wall of the adsorption chamber (3).

7. The modified membrane separation device for reducing the concentration of organic pollutants in high-salinity wastewater according to claim 5, characterized in that, The sliding rod (35) is provided with a second lever (355), and the second lever (355) is provided with a scraper (356) that rubs against the upper modified film (11).

8. The modified membrane separation device for reducing the concentration of organic pollutants in high-salinity wastewater according to claim 1, characterized in that, A circulation pipe (43) is provided on the side wall of the shell (1) located in the water collection cavity (4). One end of the circulation pipe (43) is connected to the inside of the water collection cavity (4), and the other end of the circulation pipe (43) is connected to the water inlet cavity (2). The wastewater tank (13) is equipped with a water level sensor and a controller. The circulation pipe (43) is equipped with a second switch valve. The water level sensor and the second switch valve are both electrically connected to the controller.

9. A modified membrane separation device for reducing the concentration of organic pollutants in high-salinity wastewater according to claim 1, characterized in that, A threaded rod (25) is vertically and fixedly connected to the upper modified membrane (11). The inner wall of the fixing rod (23) is threadedly connected to the threaded rod (25), and the fixing rod (23) is rotatably connected to the filter plate (21).

10. A modified membrane separation device for reducing the concentration of organic pollutants in high-salinity wastewater according to claim 1, characterized in that, The brush rod (24) is provided with a spring (241) that is fixedly connected to the side wall of the fixing rod (23).

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