A membrane separation device

Abstract

The application relates to the technical field of wastewater treatment, and discloses a membrane separation device which comprises a support frame, an exhaust cylinder supported by the support frame, an axis of the exhaust cylinder extending along a horizontal direction, an exhaust cavity formed in the exhaust cylinder, an exhaust pipe at the top of the exhaust cylinder and in communication with the exhaust cavity, and an open end of the exhaust pipe, a water accumulation cylinder supported by the support frame, coaxially rotating at the open end of the exhaust cylinder, a filter cavity formed in the water accumulation cylinder, and an open end of the water accumulation cylinder close to the exhaust cylinder, a heating element arranged in the water accumulation cylinder for heating, a saltwater separation membrane arranged at the open end of the water accumulation cylinder, separating the filter cavity from the exhaust cavity, a water conveying assembly comprising a water inlet pipe and a spraying element, the water inlet pipe being rotationally connected to the end of the water accumulation cylinder away from the saltwater separation membrane, the water inlet pipe being connected with the spraying element and in communication with the spraying element so as to convey wastewater to the spraying element, and the spraying element being arranged in the water accumulation cylinder, and a rotating element arranged between the support frame and the water accumulation cylinder and used for driving the water accumulation cylinder to rotate. The application can reduce the influence of impurities in wastewater on the passing efficiency of water molecules.

Description

Technical Field

[0001] This application relates to the technical field of wastewater treatment, and in particular to a membrane separation device. Background Technology

[0002] Industrial processes such as chemical and food processing generate large amounts of wastewater with high salt and high organic content. Direct discharge of such wastewater can easily pollute the environment and affect the ecological balance.

[0003] The existing patent document with publication number CN207738537U discloses a brine membrane separator for treating high-salt and high-organic-content wastewater, including a steam chamber, a spray chamber, a collection chamber, a membrane module, and a raw water conveying device. The steam chamber is connected to the inner cavity of the membrane module, and the spray chamber is connected to the collection chamber. The wastewater is atomized and sprayed out through the raw water conveying device. Water vapor enters the steam chamber through the membrane module and is discharged, while concentrated brine containing organic matter enters the collection chamber.

[0004] Regarding the aforementioned technologies, water molecules pass through the membrane module, while some impurities in the wastewater that are isolated by the membrane module adhere to the surface of the membrane module, and long-term accumulation can easily affect the water molecule passage efficiency. Summary of the Invention

[0005] In order to reduce the impact of impurities in wastewater on the efficiency of water molecule passage, this application provides a membrane separation device.

[0006] This application provides a membrane separation device, which adopts the following technical solution:

[0007] A membrane separation device, comprising:

[0008] Support frame;

[0009] The exhaust stack is supported by the support frame, with its axis extending horizontally. It has an exhaust chamber inside and an exhaust pipe at the top that communicates with the exhaust chamber, with one end open.

[0010] The water collection cylinder, supported by the support frame, rotates coaxially at one end of the exhaust pipe opening, and has a filter chamber inside, with an opening near the exhaust pipe.

[0011] A heating element is provided in the water collection cylinder for heating;

[0012] A brine separation membrane is disposed at the open end of the water collection cylinder to isolate the filter chamber from the exhaust box;

[0013] A water conveying assembly includes an inlet pipe and a spray element. The inlet pipe is rotatably connected to the end of the water collection cylinder away from the brine separation membrane. The inlet pipe is connected and communicates with the spray element to convey wastewater to the spray element. The spray element is located in the water collection cylinder.

[0014] A rotating component is disposed between the support frame and the water collection cylinder, and is used to drive the water collection cylinder to rotate.

[0015] By adopting the above technical solution, the spray component atomizes and sprays wastewater onto the brine separation membrane. Water vapor passes through the brine separation membrane and enters the exhaust stack, where it is discharged and collected. The remaining water flows into the collection tank and accumulates. When cleaning of the brine separation membrane is required, the collection tank is rotated by a rotating component, causing the wastewater accumulated in the collection tank to flow and flush the brine separation membrane. This flushes impurities from the brine separation membrane back into the wastewater, reducing the impact of impurities in the wastewater on the efficiency of water molecule passage.

[0016] Optionally, the membrane separation device further includes a wastewater tank, with the end of the inlet pipe away from the spray element extending into the wastewater tank, and the inlet pipe having a power source for providing water conveyance power. An overflow assembly is provided between the water collection tank and the wastewater tank, and the overflow assembly is used to discharge the water accumulated in the water collection tank into the wastewater tank.

[0017] By adopting the above technical solution, the overflow component overflows the water accumulated in the water collection tank into the wastewater pool, so that the water collection tank does not accumulate excessive wastewater and affect the use of the spray components.

[0018] Optionally, the water inlet pipe includes a coaxial section and a bent section. The coaxial section rotates coaxially on the water collection cylinder and cooperates with the spray element. The bent section is located at the end of the coaxial section away from the water collection cylinder, and the bent section bends downward relative to the coaxial section and extends into the wastewater tank.

[0019] The overflow assembly includes a drain pipe, a connector, and an overflow pipe. The connector and the overflow pipe are coaxially enclosed outside the coaxial section. An overflow space is formed between the inner wall of the connector and the outer wall of the coaxial section, and between the inner wall of the overflow pipe and the outer wall of the coaxial section. The end of the overflow pipe away from the water collection tank extends to be opposite to the wastewater tank. The connector rotates at the end of the overflow pipe near the water collection tank, and the end of the connector away from the overflow pipe has a sealing part that extends to fit against the outer wall of the coaxial section.

[0020] The drain pipe has two parts, which are respectively connected to and communicate with the opposite sides of the water collection cylinder. The ends of the two drain pipes away from the water collection cylinder are respectively connected to the opposite sides of the connector along the direction perpendicular to its own axis.

[0021] By adopting the above technical solution, through the rotating connection between the connector and the overflow pipe, when the water collection cylinder rotates, it drives the drain pipe and the connector to rotate together. When the wastewater in the water collection cylinder flows out from the overflow pipe, the wastewater in the overflow pipe can transfer heat to the wastewater in the inlet pipe to preheat the wastewater in the inlet pipe, so that when the wastewater is sprayed into the water collection cylinder, it is easier to form water vapor.

[0022] Optionally, the end of the drain pipe near the water collection cylinder is an adjustment section, which is connected to the water collection cylinder. The axis of the adjustment section is perpendicular to the axis of the water collection cylinder, and the adjustment section gradually narrows towards the water collection cylinder. The adjustment section is equipped with an opening and closing component that moves along its own axis to open and close the end of the adjustment section near the water collection cylinder.

[0023] By adopting the above technical solution, the opening and closing component can open and close the regulating section, thus preventing water vapor from being discharged from the drain pipe when the drain pipe is located above the water collection cylinder.

[0024] Optionally, the opening and closing assembly includes a connector and an adjusting ball. The connector connects the adjusting ball to the adjusting section to restrict the adjusting ball from moving out of the adjusting section. The outer diameter of the adjusting ball is smaller than the maximum inner diameter and the minimum inner diameter of the adjusting section. When the adjusting section is located at the top of the water collection cylinder, the adjusting ball is pressed against the inner wall of the adjusting section by its own weight to seal the gap between the adjusting section and the water collection cylinder.

[0025] By adopting the above technical solution, the regulating ball moves on the connector under its own gravity, so as to automatically block the regulating section when the drain pipe is above the water collection cylinder.

[0026] Optionally, a first discharge head is connected to the drain pipe, and a first opening and closing cover is detachably connected to the end of the first discharge head away from the drain pipe. When the drain pipe is located at the bottom of the water collection cylinder, the first discharge head is located at the bottom of the drain pipe.

[0027] By adopting the above technical solution, when the first opening and closing cover is removed from the first discharge head, the water accumulated in the drain pipe can flow away from the first discharge head, which facilitates the cleaning of the water accumulated in the drain pipe.

[0028] Optionally, the water collection cylinder includes a first cylinder and a second cylinder arranged coaxially, the first cylinder surrounds the outside of the second cylinder, and the inner wall of the first cylinder and the outer wall of the second cylinder form a heating space isolated from the filter cavity, and the water collection cylinder is provided with a heating element in the heating space.

[0029] Optionally, the spraying component includes a spray pipe and spray heads, the spray pipe is connected to the water inlet pipe, and the spray heads are disposed on the spray pipe and have multiple heads.

[0030] By adopting the above technical solution, multiple spray heads can improve the spraying efficiency of wastewater.

[0031] Optionally, a condenser is provided at the end of the exhaust pipe away from the exhaust stack.

[0032] Optionally, the bottom of the exhaust pipe has a second vent head communicating with the exhaust pipe, and the end of the second vent head away from the exhaust pipe is detachably connected to a second opening and closing cover for opening and closing the second vent head.

[0033] By adopting the above technical solution, when the second opening and closing cover is removed from the second discharge head, the clean water accumulated in the exhaust pipe can be discharged from the second discharge head.

[0034] In summary, this application has the following beneficial effects:

[0035] Wastewater enters the spray system through the inlet pipe and is then sprayed onto the brine separation membrane to filter water molecules into the exhaust stack. Salt molecules remain in the collection tank with the remaining wastewater. A rotating component drives the collection tank to rotate, causing the accumulated water in the tank to clean the brine separation membrane. The salts on the membrane are redissolved in the wastewater, making the membrane less prone to clogging and reducing the impact of impurities in the wastewater on the efficiency of water molecule passage. Attached Figure Description

[0036] Figure 1 This is a structural schematic diagram of an embodiment of this application;

[0037] Figure 2 This is a cross-sectional view of the water collection cylinder in the embodiment of this application;

[0038] Figure 3 yes Figure 1 Cross-sectional view of the exhaust pipe and water collection pipe at point AA;

[0039] Figure 4 yes Figure 3 A magnified structural diagram at point B in the middle.

[0040] Explanation of reference numerals in the attached drawings: 1. Support frame; 2. Exhaust pipe; 3. Exhaust chamber; 4. Exhaust pipe; 5. Water collection cylinder; 51. First cylinder body; 511. Cylinder body; 512. Cylinder cover; 513. Cylinder ring; 52. Second cylinder body; 6. Filter chamber; 7. Heating element; 8. Brine separation membrane; 9. Water inlet pipe; 91. Coaxial section; 92. Bending section; 10. Spraying element; 101. Spray pipe; 102. Spray head; 11. Rotating element; 111. Rotating motor; 112. Gear; 11 3. Meshing teeth; 12. Wastewater tank; 13. Power source; 14. Drainage pipe; 141. Adjustment section; 142. First vertical section; 143. Horizontal section; 144. Second vertical section; 15. Connector; 16. Overflow pipe; 17. Sealing part; 18. Connecting piece; 181. Support rod; 182. Stroke rod; 19. Adjusting ball; 20. First drain head; 21. First opening and closing cover; 22. Condenser; 23. Second drain head; 24. Second opening and closing cover; 25. Connecting ring. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0042] This application discloses a membrane separation device. (Refer to...) Figure 1 and Figure 2 The membrane separation device includes a support frame 1, an exhaust stack 2, a water collection tank 5, a heating element 7, a brine separation membrane 8, a water conveying assembly, a rotating component 11, and a wastewater tank 12. The wastewater tank 12 serves as a transfer station for wastewater discharge, receiving wastewater and conveying it to the water collection tank 5 via the water conveying assembly. The wastewater in the water collection tank 5 is filtered through the brine separation membrane 8, allowing water molecules to enter the exhaust stack 2. The water collection tank 5 rotates at one end of the exhaust stack 2, and the rotating component 11 drives the water collection tank 5 to move.

[0043] Reference Figure 1 and Figure 2Specifically, support frame 1 is fixedly mounted on the ground to support exhaust pipe 2 and water collection tank 5. Support frame 1 is fixed to exhaust pipe 2 and abuts against water collection tank 5. Water collection tank 5 includes a first cylinder 51 and a second cylinder 52. The second cylinder 52 is a cylindrical shape with both ends open, and its axis extends horizontally. The hollow part inside the second cylinder 52 forms a filter chamber 6. The first cylinder 51 includes a cylinder body 511, a cylinder cover 512, and a cylinder ring 513. The cylinder body 511 is a cylindrical section coaxial with the second cylinder 52 and surrounds the outside of the second cylinder 52. The inner diameter of the cylinder body 511 is larger than the outer diameter of the second cylinder 52. The cylinder cover 512 is disc-shaped and coaxially fixed to one end of the cylinder body 511 to close one end of the cylinder body 511. The end of the second cylinder 52 is coaxially fixed to the cylinder cover 512. The cylindrical ring 513 is circular. The outer diameter of the cylindrical ring 513 is the same as the outer diameter of the cylindrical body 511, and the inner diameter of the cylindrical ring 513 is the same as the outer diameter of the second cylindrical body 52. ​​The cylindrical ring 513 is coaxially fixed to the end of the cylindrical body 511 away from the cylindrical cover 512 and coaxially fixedly sleeved on the outer wall of the second cylindrical body 52. ​​The end face of the cylindrical ring 513 away from the cylindrical cover 512 is flush with the end face of the second cylindrical body 52 away from the cylindrical cover 512, so that the end of the cylindrical body 511 away from the cylindrical cover 512 is open.

[0044] The side of the cylinder cover 512 opposite to the cylinder ring 513, the inner wall of the cylinder body 511, and the outer wall of the second cylinder 52 together form a sealed heating space. The heating element 7 is installed on the outer wall of the second cylinder 52 and located in the heating space. Multiple heating elements 7 are evenly spaced along the circumference of the second cylinder 52. In this embodiment, the heating element 7 is an electric heating rod. The first cylinder 51 is made of heat-insulating material, and the second cylinder 52 is made of heat-conducting material, so that the electric heating rod can conduct heat to the filter chamber 6 when heating.

[0045] Reference Figure 2 and Figure 3 The exhaust pipe 2 is a cylindrical shape with one end open and the other closed, forming an exhaust chamber 3 inside. The outer diameter of the exhaust pipe 2 is the same as the outer diameter of the cylinder body 511, and the inner diameter of the exhaust pipe 2 is the same as the inner diameter of the cylinder body 511. A connecting ring 25 with a T-shaped longitudinal section is coaxially fixed on the end face of the cylinder ring 513 away from the cylinder body 511. The T-shaped head of the connecting ring 25 faces the exhaust pipe 2. A rotating groove is opened on the end face of the exhaust pipe 2 with an opening, allowing the connecting ring 25 to rotate coaxially. The cylinder ring 513 is coaxially rotatably connected to the end of the exhaust pipe 2 with an opening through the connection ring 25 and the rotating groove. An upwardly extending exhaust pipe 4 is fixed to the top of the exhaust pipe 2. The exhaust pipe 4 communicates with the exhaust chamber 3, and the end of the exhaust pipe 4 away from the exhaust chamber 3 is connected to a condenser 22.

[0046] The brine separation membrane 8 is circular with an outer diameter matching the inner diameter of the second cylinder 52. The brine separation membrane 8 is coaxially connected to the end of the second cylinder 52 closest to the exhaust pipe 2, thus isolating the exhaust chamber 3 from the filter chamber 6. The exhaust chamber 3 and the filter chamber 6 can only communicate through the pores on the brine separation membrane 8. The brine separation membrane 8 is a conventional hydrophobic microporous membrane. Water vapor and water droplets can pass through the pores of the brine separation membrane 8. However, due to the larger size of salt molecules and the surface tension of water flow, neither salt molecules nor water flow easily pass through the brine separation membrane 8, thus blocking them on one side of the brine separation membrane 8.

[0047] Reference Figure 1 and Figure 2 The water conveying assembly includes an inlet pipe 9 and a spray element 10. The inlet pipe 9 connects the wastewater tank 12 and the second cylinder 52. The inlet pipe 9 has a power source 13 for providing water conveyance power. The power source 13 is a water pump to draw wastewater from the wastewater tank 12 into the second cylinder 52. One end of the inlet pipe 9 near the second cylinder 52 coaxially passes through the cylinder cover 512 and enters the second cylinder 52. The cylinder cover 512 is rotatably sleeved on the outer wall of the inlet pipe 9.

[0048] Reference Figure 2 The spray assembly 10 includes a spray pipe 101 and spray heads 102. The spray pipe 101 is a semi-circular rigid pipe with a connected straight section and a semi-circular arc section. Multiple spray heads 102 are evenly spaced on the semi-circular arc section of the spray pipe 101, with the water outlet of each spray head 102 facing the brine separation membrane 8. An inlet pipe 9 connects to and is positioned in the middle of the straight section of the spray pipe 101 to support the spray pipe 101 and spray heads 102. The diameter of the semi-circular arc section of the spray pipe 101 is smaller than the inner diameter of the second cylinder 52 and is located in the upper half of the filter chamber 6.

[0049] Reference Figure 1 and Figure 3 Water flows from the inlet pipe 9 to the spray pipe 101 and is atomized and sprayed from the spray head 102 toward the brine separation membrane 8. It is heated and partially converted into water vapor, which allows water molecules to pass through the brine separation membrane 8 and enter the exhaust pipe 2 shaft for collection. The water vapor is discharged from the exhaust pipe 4 to the condenser 22 for condensation, while the salt-containing wastewater remaining in the filter chamber 6 is collected in the filter chamber 6.

[0050] Reference Figure 1 and Figure 2The rotating component 11 includes a rotating motor 111, a gear 112, and meshing teeth 113. The meshing teeth 113 are distributed circumferentially on the outer wall of the cylinder 511. The rotating motor 111 is mounted on the support frame 1. The gear 112 is coaxially fixed to the output end of the rotating motor 111. The axis of the gear 112 and the axis of the output end of the rotating motor 111 are both parallel to the axis of the cylinder 511. The gear 112 meshes with the meshing teeth 113. The output end of the rotating motor 111 can rotate in both directions, so that the rotating motor 111 drives the gear 112 to rotate, thereby driving the cylinder 511 to rotate. Even if the second cylinder 52 rotates together with the cylinder 511, the wastewater accumulated in the filter chamber 6 will flush the brine separation membrane 8 during the rotation of the second cylinder 52, thereby washing the impurities attached to the brine separation membrane 8 into the wastewater accumulated in the filter chamber 6. The wastewater in the filter chamber 6 is heated, which will redissolve the salt molecules that have precipitated onto the brine separation membrane 8 in the wastewater.

[0051] Reference Figure 1 and Figure 3 Furthermore, in order to prevent the wastewater in the filter chamber 6 from overflowing into the spray head 102 and affecting the spraying, an overflow component is provided between the second cylinder 52 and the wastewater pool 12 to discharge excess wastewater in the second cylinder 52 into the wastewater pool 12.

[0052] Specifically, the inlet pipe 9 includes a coaxial section 91 and a bent section 92. The coaxial section 91 is a straight line whose length direction coincides with the extended line of the cylinder body 511. One end of the coaxial section 91 is coaxially inserted through the cylinder cover 512 and connected to the spray pipe 101. The other end of the coaxial section 91 extends to the wastewater tank 12. The wastewater tank 12 is a square tank with an open top. The bent section 92 is a round pipe with the same diameter as the coaxial section 91. The bent section 92 is connected to the end of the coaxial section 91 opposite to the wastewater tank 12. The bent section 92 bends downward relative to the coaxial section 91 and extends to the bottom of the wastewater tank 12. The water pump is mounted on the coaxial section 91.

[0053] The overflow assembly includes a drain pipe 14, a connector 15, and an overflow pipe 16. The connector 15 is cylindrical with an inner diameter larger than the outer diameter of the coaxial section 91. The connector 15 is coaxially fitted around the end of the coaxial section 91 near the cover 512, and the connector 15 is located on the side of the cover 512 away from the filter chamber 6. The end of the connector 15 near the cover 512 is integrally formed and extends along the axis of the connector 15 to a sealing part 17 that fits against the outer wall of the coaxial section 91. The sealing part 17 closes the end of the connector 15 near the cover 512 with the coaxial section 91, and the sealing part 17 can rotate around the axis of the coaxial section 91 on the outer wall of the coaxial section 91.

[0054] The overflow pipe 16 is a circular tube with an inner diameter matching that of the connector 15. The overflow pipe 16 is coaxially enclosed within the coaxial section 91. One end of the overflow pipe 16 extends to the wastewater tank 12, and the wastewater tank 12 has a support extending adjacent to the overflow pipe 16 to support it. The end of the overflow pipe 16 away from the wastewater tank 12 extends to the connector 15. The end of the connector 15 away from the cylinder cover 512 is coaxially and rotatably connected to the end of the overflow pipe 16. The space between the inner wall of the overflow pipe 16 and the outer wall of the coaxial section 91, as well as the space between the inner wall of the connector 15 and the outer wall of the coaxial section 91, together form the overflow space.

[0055] There are two drain pipes 14, which are respectively connected to the opposite sides of the second cylinder 52. The ends of the two drain pipes 14 away from the second cylinder 52 are connected to the connector 15 so that the water accumulated in the second cylinder 52 can be drained to the connector 15 and flow into the wastewater pool 12 through the overflow pipe 16 from the connector 15. When the second cylinder 52 rotates, it drives the drain pipes 14 and the connector 15 to rotate together.

[0056] Reference Figure 3 Each drain pipe 14 includes an adjusting section 141, a first vertical section 142, a horizontal section 143, and a second vertical section 144, which extend sequentially from the second cylinder 52 towards the connecting section and are connected in sequence. The adjusting section 141 is a conical tube extending radially along the second cylinder 52. The end face of the adjusting section 141 near the filter chamber 6 is flush with the inner wall of the second cylinder 52, and the inner radial direction of the adjusting section 141 gradually increases away from the second cylinder 52. The first vertical section 142 is a circular tube with an inner diameter consistent with the maximum inner diameter of the adjusting section 141. The first vertical section 142 is coaxially connected to the end of the adjusting section 141 away from the second cylinder 52, and the end of the first vertical section 142 away from the adjusting section 141 extends out of the cylinder body 511 along the axial direction of the adjusting section 141. The second vertical section 144 is a circular tube, and one end of the second vertical section 144 is connected to and communicates with the connector 15. The second vertical section 144 is parallel to the first vertical section 142. The horizontal segment 143 is a horizontally extending circular tube that connects the first vertical segment 142 and the second vertical segment 144.

[0057] Reference Figure 1 and Figure 3The adjusting sections 141 of the two drain pipes 14 are located on opposite sides of the cylinder body 511, and the second vertical sections 144 of the two drain pipes 14 are located on opposite sides of the connector 15. The rotating motor 111 drives the cylinder 511 to rotate 180° each time, and the rotation alternates between forward and reverse. When the rotating motor 111 stops rotating, the two drain pipes 14 are located on the upper and lower sides of the second cylinder 52, respectively. This causes the wastewater accumulated in the filter chamber 6 to first flow into the horizontal section 143 on the lower side of the second cylinder 52, and then gradually accumulate in the first vertical section 142, the second vertical section 144, and the second cylinder 52. When the wastewater in the second cylinder 52 accumulates to a position close to the middle of the second cylinder 52, the wastewater in the second vertical section 144 flows into the overflow pipe 16 and overflows from the end of the overflow pipe 16 away from the connector 15 into the wastewater pool 12. During the flow of the wastewater in the overflow pipe 16, it comes into contact with the coaxial section 91 to transfer heat to the wastewater in the coaxial section 91, making it easier for the wastewater sprayed into the second cylinder 52 to form water vapor.

[0058] Reference Figure 3 and Figure 4 Furthermore, to prevent water vapor in the filter chamber 6 from easily escaping from the drain pipe 14 on the upper side of the second cylinder 52, the regulating section 141 is equipped with an opening and closing assembly for opening and closing one end of the regulating section 141 near the filter chamber 6. The opening and closing assembly includes a connector 18 and an adjusting ball 19. The connector 18 is disposed in the regulating section 141, and the adjusting ball 19 moves on the connector 18 to open and close the regulating section 141.

[0059] Specifically, the connector 18 includes a support rod 181 and a stroke rod 182. The support rod 181 extends radially along the adjusting section 141, and its two ends are fixed to the inner walls of opposite sides of the adjusting section 141 near the first vertical section 142. The stroke rod 182 is fixed to the middle of the support rod 181 and extends towards the second cylinder 52, with its length direction coinciding with the axis of the adjusting section 141. The adjusting ball 19 is spherical, with its outer diameter smaller than both the maximum and minimum inner diameter of the adjusting section 141, and it slides along the length of the stroke rod 182 on the outer wall of the stroke rod 182.

[0060] When the regulating section 141 is located above the second cylinder 52, the regulating ball 19 slides downward under its own weight until it blocks the end of the regulating section 141 near the second cylinder 52, thus restricting water vapor from escaping from the regulating section 141. When the regulating section 141 is located below the second cylinder 52, the regulating ball 19 slides downward under its own weight until it abuts against the support rod 181, at which point there is space between the regulating ball 19 and the inner wall of the regulating section 141 for water to flow through.

[0061] Reference Figure 1 and Figure 3Furthermore, each drain pipe 14 is connected to a first discharge head 20 on the side of the horizontal section 143 opposite to the cylinder body 511. The first discharge head 20 is a circular tube communicating with the horizontal section 143, and the axis of the first discharge head 20 is perpendicular to the axis of the horizontal section 143. A first opening and closing cap 21 is threaded onto the outer wall of the end of the first discharge head 20 away from the drain pipe 14, closing the end of the first discharge head 20 away from the drain pipe 14. When the wastewater filtration is complete, the first opening and closing cap 21 is removed from the first discharge head 20, allowing the concentrated saline wastewater accumulated in the first vertical section 142, the horizontal section 143, and the second vertical section 144 to be discharged and collected from the first discharge head 20. When the device needs to be cleaned, the cleaning water is poured into the wastewater pool 12 and the wastewater is transported to the second cylinder 52 through the water inlet pipe 9 and sprayed out so as to clean the second cylinder 52 and discharge the cleaning water from the first outlet head 20.

[0062] A second drain head 23 extending vertically downwards is connected to the bottom of the exhaust stack 2. The second drain head 23 is cylindrical and communicates with the exhaust stack 2. A second opening and closing cover 24 is threaded onto the bottom of the second drain head 23 to close the bottom of the second drain head 23. After the wastewater treatment is completed, the second opening and closing cover 24 is removed from the second drain head 23, and some of the filtered clean water in the exhaust stack 2 that did not enter the condenser 22 can be discharged and collected from the second drain head 23.

[0063] In addition, to improve sealing, sealing rubber rings (not shown in the figure) are provided between the cylinder ring 513 and the exhaust pipe 2, between the cylinder cover 512 and the coaxial section 91, between the sealing part 17 and the coaxial section 91, and between the connector 15 and the drain pipe 14, so as to improve sealing when the two rotate relative to each other.

[0064] The implementation principle of the membrane separation device in this application embodiment is as follows: Wastewater from the wastewater tank 12 is drawn into the second cylinder 52 through the inlet pipe 9 and atomized and sprayed out from the spray head 102. Water vapor passes through the brine separation membrane 8 to filter the salt in the wastewater. The water vapor moves from the exhaust pipe 4 in the exhaust stack 2 to the condenser 22 for condensation. The remaining saline wastewater is collected in the second cylinder 52. When the wastewater accumulates in the second cylinder 52 to near the middle, it overflows from the overflow pipe 16 back into the wastewater tank 12. After the wastewater has been filtered for a period of time, the rotating motor 111 is started to rotate the water collection cylinder 5 180°, causing the two drain pipes 14 to switch positions. The wastewater then washes the brine separation membrane 8 in the second cylinder 52, flushing impurities and salt from the membrane back into the wastewater.

[0065] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A membrane separation device, characterized in that, include: Support frame (1); The exhaust pipe (2) is supported by the support frame (1), with its axis extending horizontally. It has an exhaust chamber (3) inside and an exhaust pipe (4) at the top that communicates with the exhaust chamber (3), and one end is open. The water collection cylinder (5) is supported by the support frame (1) and rotates coaxially at one end of the opening of the exhaust cylinder (2). It has a filter chamber (6) inside and is open at one end near the exhaust cylinder (2). A heating element (7) is disposed in the water collection cylinder (5) for heating; A brine separation membrane (8) is disposed at one end of the water collection cylinder (5) with an opening to isolate the filter chamber (6) from the exhaust cylinder (2); The water supply assembly includes an inlet pipe (9) and a spray element (10). The inlet pipe (9) is rotatably connected to one end of the water collection cylinder (5) away from the brine separation membrane (8). The inlet pipe (9) is connected and communicates with the spray element (10) to transport wastewater to the spray element (10). The spray element (10) is located in the water collection cylinder (5). A rotating component (11) is disposed between the support frame (1) and the water collection cylinder (5) for driving the water collection cylinder (5) to rotate; The membrane separation device also includes a wastewater tank (12), the end of the water inlet pipe (9) away from the spray element (10) extends into the wastewater tank (12), and the water inlet pipe (9) has a power source (13) for providing water conveyance power. An overflow assembly is provided between the water collection cylinder (5) and the wastewater tank (12), and the overflow assembly is used to discharge the water accumulated in the water collection cylinder (5) into the wastewater tank (12). The overflow assembly includes a drain pipe (14), a connector (15), and an overflow pipe (16). The end of the drain pipe (14) near the water collection cylinder (5) is an adjustment section (141). The adjustment section (141) is connected to the water collection cylinder (5). The axis of the adjustment section (141) is perpendicular to the axis of the water collection cylinder (5). The adjustment section (141) gradually narrows towards the water collection cylinder (5). The adjustment section (141) is provided with an opening and closing component along its own axis to open and close the end of the adjustment section (141) near the water collection cylinder (5). The opening and closing assembly includes a connector (18) and an adjusting ball (19). The connector (18) connects the adjusting ball (19) to the adjusting section (141) to restrict the adjusting ball (19) from moving out of the adjusting section (141). The outer diameter of the adjusting ball (19) is smaller than the maximum inner diameter of the adjusting section (141) and larger than the minimum inner diameter of the adjusting section (141). When the adjusting section (141) is located at the top of the water collection cylinder (5), the adjusting ball (19) is pressed against the inner wall of the adjusting section (141) by its own weight to seal the gap between the adjusting section (141) and the water collection cylinder (5).

2. The membrane separation device according to claim 1, characterized in that: The water inlet pipe (9) includes a coaxial section (91) and a bent section (92). The coaxial section (91) rotates coaxially on the water collection cylinder (5) and cooperates with the spray element (10). The bent section (92) is located at the end of the coaxial section (91) away from the water collection cylinder (5), and the bent section (92) bends downward relative to the coaxial section (91) and extends into the wastewater pool (12). The connector (15) and the overflow pipe (16) are coaxially enclosed outside the coaxial section (91). The inner wall of the connector (15) and the outer wall of the coaxial section (91) and the inner wall of the overflow pipe (16) and the outer wall of the coaxial section (91) together form an overflow space. The overflow pipe (16) extends away from the water collection cylinder (5) to be opposite to the wastewater tank (12). The connector (15) rotates at the end of the overflow pipe (16) close to the water collection cylinder (5). The end of the connector (15) away from the overflow pipe (16) has a sealing part (17) that extends to fit against the outer wall of the coaxial section (91). There are two drain pipes (14), which are respectively connected to and communicate with the opposite sides of the water collection cylinder (5). The ends of the two drain pipes (14) away from the water collection cylinder (5) are respectively connected to the opposite sides of the connector (15) along the direction perpendicular to its own axis.

3. The membrane separation device according to claim 2, characterized in that: The drain pipe (14) is connected to a first discharge head (20). The first discharge head (20) is detachably connected to a first opening and closing cover (21) at the end away from the drain pipe (14). When the drain pipe (14) is located at the bottom of the water collection cylinder (5), the first discharge head (20) is located at the bottom of the drain pipe (14).

4. The membrane separation device according to claim 1, characterized in that: The water collection cylinder (5) includes a first cylinder (51) and a second cylinder (52) arranged coaxially. The first cylinder (51) surrounds the outside of the second cylinder (52), and the inner wall of the first cylinder (51) and the outer wall of the second cylinder (52) form a heating space isolated from the filter cavity (6). The heating element (7) is disposed in the heating space.

5. The membrane separation device according to claim 1, characterized in that: The spraying component (10) includes a spray pipe (101) and a spray head (102). The spray pipe (101) is connected to the water inlet pipe (9), and the spray head (102) is disposed on the spray pipe (101) and has multiple heads.

6. The membrane separation device according to claim 1, characterized in that: A condenser (22) is provided at the end of the exhaust pipe (4) away from the exhaust cylinder (2).

7. The membrane separation device according to claim 1, characterized in that: The bottom of the exhaust pipe (2) has a second discharge head (23) that communicates with the exhaust pipe (2). The end of the second discharge head (23) away from the exhaust pipe (2) is detachably connected to a second opening and closing cover (24) for opening and closing the second discharge head (23).

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