Membrane separation system for enriching water-soluble nutrients

Abstract

The invention discloses a membrane separation system for enriching water-soluble nutrients, and relates to the technical field of organic waste liquid treatment equipment.The membrane separation system comprises a bearing frame, a barrel is fixed to the bearing frame, a filter cartridge is fixed in the barrel, a lifting ring is fixed to a connecting frame, and an extrusion barrel is sleeved with the lifting ring in a sealed and sliding mode; a sealing ring block which is in sealing sliding connection with the inner wall of the filter cylinder is fixed on the lifting ring, a lifting sleeve is mounted on the bearing frame, and a cylindrical separation membrane is vertically fixed in the vertical cylinder. A connecting column is hooked through a clamping hook assembly, under the driving action of a lifting assembly, after the connecting column ascends, an extrusion cylinder is driven to move upwards through a vertical sleeve, after a connecting hook frame and an abutting and pushing cover abut against each other, the connecting column is unlocked through the connecting hook frame, the extrusion cylinder moves downwards, and sludge in a cylinder body is extruded in an impact mode; and the arranged sealing ring block can move downwards relative to the extrusion cylinder, so that secondary impact extrusion on the sludge is realized, and the separation full degree of the sludge in the organic waste liquid is remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of organic waste liquid treatment equipment, in particular to a membrane separation system for enriching water-soluble nutrients. Background Art

[0002] Liquid fertilizer is organic fertilizer or chemical fertilizer mixed with water and then sprayed directly on the leaves or roots of plants to allow them to be absorbed more quickly. Liquid fertilizer is rich in important nutrients necessary for plant growth and a variety of vitality factors, nutrient regulators, etc. It can fully supplement the lack of soil nutrients through periodic replenishment during the crop growth period to meet the needs of crop growth.

[0003] In the process of liquid fertilizer production, membrane separation technology is used to recover water-soluble nutrients from organic waste liquid for the production of liquid fertilizer. However, in the process of recovering water-soluble nutrients by existing membrane separation devices, it is necessary to squeeze and filter the organic waste liquid containing sludge through an extrusion mechanism to separate insoluble matter. However, the organic waste liquid containing sludge will diffuse during extrusion, and cannot be squeezed a second time after diffusion, and the separation and filtration operation effect is poor, resulting in a large amount of insoluble matter in the organic waste liquid during the solution membrane separation process, and the recovery effect of water-soluble nutrients is affected. For this reason, a membrane separation system for enriching water-soluble nutrients is provided to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a membrane separation system for enriching water-soluble nutrients to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A membrane separation system for enriching water-soluble nutrients comprises a carrier frame, a cylinder is fixed on the carrier frame, a sealing bottom cover is sealingly installed at the bottom of the cylinder, a filter cartridge is fixed in the cylinder, a water outlet hole located between the cylinder and the filter cartridge is opened on the sealing bottom cover, a guide column is vertically fixed on the carrier frame, a vertical sleeve is slidably sleeved on the guide column, an extrusion cartridge vertically corresponding to the cylinder is fixed at the bottom of the vertical sleeve, a connecting frame is vertically slidably installed on the extrusion cartridge, a connecting spring is fixed between the connecting frame and the extrusion cartridge, a lifting ring sealingly and slidingly sleeved on the extrusion cartridge is fixed on the connecting frame, a sealing ring block sealingly and slidably connected to the inner wall of the filter cartridge is fixed on the lifting ring, and a connecting frame is provided on the connecting frame. A locking assembly for connecting the vertical sleeve is installed, a push frame is slidably installed on the vertical sleeve, an unlocking assembly for unlocking the locking assembly is connected between the lifting ring and the push frame, a connecting column is fixedly sleeved on the vertical sleeve, a lifting sleeve is installed on the supporting frame, a force storage spring sleeved on the guide column is fixed at the bottom of the lifting sleeve, the force storage spring vertically corresponds to the connecting column, a lifting assembly is installed on the supporting frame, a hook assembly for hooking the connecting column is installed on the lifting assembly, a lifting pipe is installed in communication with the bottom of the sealing bottom cover, a vertical cylinder connected to the lifting pipe is fixed on the supporting frame, and a cylindrical separation membrane is vertically fixed in the vertical cylinder.

[0007] As an improved solution of the present invention: the lifting assembly includes a motor fixed on the supporting frame, the output shaft of the motor is coaxially fixed with a vertically arranged threaded column, and the threaded column is threadedly sleeved with a lifting frame slidably connected to the supporting frame.

[0008] As an improved solution of the present invention: the hook assembly includes a pair of connecting hook frames rotatably installed on the lifting frame, a torsion spring is fixed between the connecting hook frames and the lifting frame, a wedge-shaped hook claw vertically corresponding to the connecting column is fixed to the lower end of the connecting hook frame, a hook groove adapted to be engaged with the wedge-shaped hook claw is provided on the connecting column, a push cover is installed on the supporting frame, and an inner conical surface vertically corresponding to the upper end of the connecting hook frame is provided in the push cover.

[0009] As an improved solution of the present invention: the locking assembly includes a guide rod slidably mounted on the connecting frame, a positioning wedge is fixed on the guide rod, a wedge groove adapted to be inserted into the positioning wedge is opened on the vertical sleeve, and a push spring I is fixedly connected between the positioning wedge and the connecting frame.

[0010] As an improved solution of the present invention: the unlocking component includes a transmission frame rotatably mounted on the lifting ring, the push frame vertically corresponds to the positioning wedge block, a pulling spring is fixed between the push frame and the connecting column, a strip hole is opened on the transmission frame, a pin column slidingly adapted to the strip hole is fixed on the push frame, a vertical strip hole is opened on the supporting frame, and a paddle extending into the vertical strip hole is fixed on one end of the transmission frame away from the push frame.

[0011] As an improved solution of the present invention: a positioning block is slidably installed on the connecting frame, a push spring II is fixedly connected between the positioning block and the connecting frame, and a positioning groove for the positioning block to be plugged in and adapted is opened on the vertical sleeve, and the positioning groove is located below the wedge groove.

[0012] As an improved solution of the present invention: a cylinder is fixed on the support frame, a free end of the cylinder is fixed to the push cover, and the lifting sleeve slides through the push cover.

[0013] As an improved solution of the present invention: a central gear is rotatably mounted on the support frame, and racks I and II are respectively meshed and connected on both sides of the central gear, rack I is fixed to the thrust cover, and rack II is fixed to the lifting sleeve.

[0014] As an improved solution of the present invention: a lifting pump is fixed on the support frame, the inlet end of the lifting pump is connected with the lifting pipe, the outlet end of the lifting pump is connected with the vertical cylinder through the delivery pipe, and a check valve is installed on the delivery pipe.

[0015] As an improved solution of the present invention: a drainage pipe extending to the outside of the vertical cylinder is installed on the top of the cylindrical separation membrane, and a discharge pipe is installed on the lower side wall of the vertical cylinder, and an electric control valve is installed on the discharge pipe.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention hooks the connecting column through the hook assembly. Under the driving action of the lifting assembly, the connecting column rises and drives the extrusion cylinder to move upward through the vertical sleeve. After the connecting hook frame and the push cover push, the connecting hook frame unlocks the connecting column, so that the extrusion cylinder moves downward and performs impact extrusion on the sludge in the cylinder. The provided sealing ring block can move downward relative to the extrusion cylinder to achieve secondary impact extrusion of the sludge, and the degree of separation of sludge in organic waste liquid is significantly improved.

[0018] 2. In the present invention, the push cover and the lifting sleeve can be adjusted vertically, and the sliding directions of the two are opposite, so that the compression degree of the force storage spring and the lifting height of the extrusion cylinder can be flexibly adjusted, and corresponding adjustments can be made according to the amount of organic waste liquid to be impact filtered, thereby ensuring that the organic waste liquid is fully impacted and extruded to achieve sufficient filtration, thereby improving the membrane separation and extraction effect of water-soluble nutrients. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the present invention after partial sectioning;

[0021] Figure 3 For the present invention Figure 1 Schematic diagram from a certain perspective;

[0022] Figure 4 It is an exploded view of a local structure of the present invention;

[0023] Figure 5 It is a connection diagram of the unlocking assembly, the push frame, the connecting frame and the connecting column in the present invention;

[0024] Figure 6 For the present invention Figure 5 Schematic diagram of the local structure;

[0025] Figure 7 It is a schematic diagram of the structure of the unlocking component in the present invention;

[0026] Figure 8 It is a schematic diagram of the structure of the connecting column and the vertical sleeve in the present invention;

[0027] Fig. 9 It is a structural schematic diagram of the locking assembly in the present invention;

[0028] Fig.10 It is a schematic diagram of the connection of the hook assembly, the connecting column, the lifting frame and other components in the present invention;

[0029] Fig.11 It is a schematic diagram of the connection between the thrust cover, rack I, rack II, central gear and lifting sleeve in the present invention;

[0030] Fig.12 It is a schematic diagram of the internal structure of the vertical cylinder in the present invention.

[0031] In the figure: 1-carrying frame, 2-cylinder, 3-sealed bottom cover, 4-push cover, 5-cylinder, 6-lifting frame, 7-transmission frame, 8-pin, 9-connecting column, 10-lifting ring, 11-vertical sleeve, 12-connecting hook frame, 13-storage spring, 14-connecting frame, 15-filter cylinder, 16-sealing ring block, 17-motor, 18-threaded column, 19-water outlet, 20-vertical bar hole, 21-extrusion cylinder, 22-push frame, 23-connecting spring, 24-tension spring, 25-hook groove, 26-positioning groove, 27- Inner cone, 28-positioning wedge, 29-push spring I, 30-guide rod, 31-wedge groove, 32-positioning plug, 33-push spring II, 34-wedge hook, 35-torsion spring, 36-rack I, 37-center gear, 38-rack II, 39-lifting sleeve, 40-guide column, 41-strip hole, 42-push plate, 43-vertical cylinder, 44-cylindrical separation membrane, 45-lifting pump, 46-lifting pipe, 47-check valve, 48-delivery pipe, 49-discharge pipe, 50-electrically controlled valve, 51-drain pipe. DETAILED DESCRIPTION

[0032] The technical solution of the present invention is further described in detail below in conjunction with specific embodiments:

[0033] Example 1

[0034] See also Figure 1-12 A membrane separation system for enriching water-soluble nutrients comprises a carrier 1, a cylinder 2 is fixed on the carrier 1, a sealing bottom cover 3 is sealed and installed at the bottom of the cylinder 2, a filter cartridge 15 is fixed in the cylinder 2, a water outlet 19 is opened on the sealing bottom cover 3 and is located between the cylinder 2 and the filter cartridge 15, a guide column 40 is vertically fixed on the carrier 1, a vertical sleeve 11 is slidably sleeved on the guide column 40, an extrusion cylinder 21 vertically corresponding to the cylinder 2 is fixed at the bottom of the vertical sleeve 11, a connecting frame 14 is vertically slidably installed on the extrusion cylinder 21, a connecting spring 23 is fixed between the connecting frame 14 and the extrusion cylinder 21, and a lifting ring 10 which is sealed and slidably sleeved on the extrusion cylinder 21 is fixed on the connecting frame 14 A sealing ring block 16 is fixed on the lifting ring 10 and is sealingly and slidingly connected to the inner wall of the filter cartridge 15. A locking assembly for connecting the vertical sleeve 11 is installed on the connecting frame 14. A push frame 22 is slidably installed on the vertical sleeve 11. An unlocking assembly for unlocking the locking assembly is connected between the lifting ring 10 and the push frame 22. A connecting column 9 is fixedly sleeved on the vertical sleeve 11. A lifting sleeve 39 is installed on the supporting frame 1. A force storage spring 13 sleeved on the guide column 40 is fixed at the bottom of the lifting sleeve 39. The force storage spring 13 vertically corresponds to the connecting column 9. A lifting assembly is installed on the supporting frame 1, and a hook assembly for hooking the connecting column 9 is installed on the lifting assembly.

[0035] When dehydrating, filtering and separating the sludge of organic waste liquid, the sludge is put into the filter cylinder 15 of the sludge cylinder 2, and the extrusion cylinder 21 extends into the filter cylinder 15 and vertically squeezes the sludge. After the sludge is compressed, it is filtered through the filter cylinder 15, so that the liquid components in the sludge pass through the filter cylinder 15 and enter the area between the filter cylinder 15 and the cylinder 2, and then the water passes through the water outlet 19 into the sealed bottom cover 3, thereby achieving the effect of collecting water.

[0036] A lifting pipe 46 is installed at the bottom of the sealing bottom cover 3, a vertical cylinder 43 connected to the lifting pipe 46 is fixed on the support frame 1, a cylindrical separation membrane 44 is vertically fixed in the vertical cylinder 43, a lifting pump 45 is fixed on the support frame 1, the inlet end of the lifting pump 45 is connected to the lifting pipe 46, and the outlet end of the lifting pump 45 is connected to the vertical cylinder 43 through a delivery pipe 48, a check valve 47 is installed on the delivery pipe 48, a drain pipe 51 extending to the outside of the vertical cylinder 43 is installed on the top of the cylindrical separation membrane 44, a discharge pipe 49 is installed on the lower side wall of the vertical cylinder 43, and an electric control valve 50 is installed on the discharge pipe 49.

[0037] The lifting pump 45 is provided to pump the liquid component into the vertical cylinder 43. The check valve 47 is provided to effectively prevent the liquid component from flowing back. The liquid component is separated by the cylindrical separation membrane 44, so that the water-soluble nutrients are accumulated in the area between the vertical cylinder 43 and the cylindrical separation membrane 44, and the water passes through the cylindrical separation membrane 44 and can be discharged through the drain pipe 51.

[0038] The lifting assembly of the device includes a motor 17 fixed on the carrier 1, and a vertically arranged threaded column 18 is coaxially fixed to the output shaft of the motor 17, and a lifting frame 6 slidably connected to the carrier 1 is threadedly sleeved on the threaded column 18. The motor 17 can drive the threaded column 18 to rotate, and the threaded column 18 drives the lifting frame 6 to move vertically, so that the lifting frame 6 drives the hook assembly and the connecting column 9 to move, so as to move the extrusion cylinder 21 upward, release the connecting column 9 through the hook assembly, and move the extrusion cylinder 21 downward to impact and pressurize the sludge inside the cylinder 2, which greatly promotes the rapid filtration and separation of the sludge.

[0039] Specifically, the hook assembly of the device includes a pair of connecting hook frames 12 rotatably mounted on the lifting frame 6, a torsion spring 35 is fixed between the connecting hook frames 12 and the lifting frame 6, a wedge-shaped hook claw 34 vertically corresponding to the connecting column 9 is fixed to the lower end of the connecting hook frame 12, and a hook groove 25 adapted to be engaged with the wedge-shaped hook claw 34 is provided on the connecting column 9, a push cover 4 is installed on the supporting frame 1, and an inner conical surface 27 vertically corresponding to the upper end of the connecting hook frame 12 is provided in the push cover 4.

[0040] Through the above arrangement, the lifting frame 6 moves up and drives the connecting hook frame 12 to move vertically upward. At this time, the wedge-shaped hook claw 34 on the connecting hook frame 12 is clamped on the hook groove 25 and drives the connecting column 9 to move vertically upward, so that the vertical sleeve 11 drives the extrusion cylinder 21 to move vertically upward. During the upward movement of the extrusion cylinder 21, the connecting column 9 moves up and pushes the storage spring 13 to be compressed. When the connecting hook frame 12 moves up to abut against the inner conical surface 27 on the push cover 4, the upper end of the connecting hook frame 12 rotates close to the guide column 40, and the wedge-shaped hook claw 34 moves away from the connecting column 9. The wedge-shaped hook 34 is drawn out from the wedge groove 31 to unlock the connecting column 9, thereby realizing rapid downward movement under the gravity of the vertical sleeve 11 and the elastic thrust of the storage spring 13, thereby realizing the vertical downward movement of the extrusion cylinder 21 and impact-pressurizing the sludge in the cylinder body 2, which greatly improves the pressure degree of the sludge. After the impact, the sludge is dispersed along the inner wall of the filter cylinder 15, and the sludge is filtered through the filter cylinder 15, which promotes the rapid precipitation of sewage and greatly improves the filtering and separation effect of sludge in organic waste liquid.

[0041] In addition, a cylinder 5 is fixed on the supporting frame 1 of the device, the free end of the cylinder 5 is fixed to the push cover 4, the lifting sleeve 39 slides through the push cover 4, and a central gear 37 is rotatably installed on the supporting frame 1. The two sides of the central gear 37 are respectively meshed and connected with a rack I36 and a rack II38. The rack I36 is fixed to the push cover 4, and the rack II38 is fixed to the lifting sleeve 39.

[0042] Based on the above arrangement, the push hood 4 driven by the cylinder 5 moves vertically upward, the push hood 4 drives the rack I36 to move upward, the rack I36 drives the center gear 37 to rotate, the center gear 37 drives the rack II38 meshing therewith to move downward, and the lifting sleeve 39 drives the storage spring 13 to move vertically downward. Through the above arrangement, the storage spring 13 obtains a larger compression amount, and the extrusion cylinder 21 has a higher release height, thereby playing an effect of adjusting the impact force of the downward movement of the extrusion cylinder 21, realizing adaptive adjustment according to the amount of sludge, ensuring that the sludge is fully impacted and extruded, and the filtering effect of the sludge in the organic waste liquid is significantly improved, thereby greatly reducing the content of insoluble matter in the liquid component entering the vertical cylinder 43, and greatly improving the membrane separation and extraction effect of water-soluble nutrients.

[0043] Example 2

[0044] See also Figure 1-12 On the basis of Example 1, in addition, the locking assembly of the device includes a guide rod 30 slidably mounted on the connecting frame 14, a positioning wedge 28 is fixed on the guide rod 30, a wedge groove 31 adapted to be plugged into the positioning wedge 28 is opened on the vertical sleeve 11, and a push spring 129 is fixedly connected between the positioning wedge 28 and the connecting frame 14.

[0045] The unlocking assembly of the present device includes a transmission frame 7 rotatably mounted on a lifting ring 10, a push frame 22 vertically corresponding to a positioning wedge 28, a pulling spring 24 fixed between the push frame 22 and a connecting column 9, a strip hole 41 provided on the transmission frame 7, a pin 8 slidably fitted with the strip hole 41 fixed on the push frame 22, a vertical strip hole 20 provided on the supporting frame 1, and a dial plate 42 extending into the vertical strip hole 20 fixed on one end of the transmission frame 7 away from the push frame 22.

[0046] During the vertical downward movement of the lifting ring 10, the transmission frame 7 moves vertically downward, and the dial plate 42 on the transmission frame 7 moves vertically downward along the vertical bar hole 20. When the dial plate 42 moves to the lowest point of the vertical bar hole 20, the dial plate 42 abuts against the supporting frame 1, causing the transmission frame 7 to rotate clockwise. At this time, the transmission frame 7 drives the pin column 8 to move vertically downward, and the pin column 8 drives the push frame 22 to move downward and push the positioning wedge block 28. The positioning wedge block 28 slides away from the vertical sleeve 11. At this time, under the vertical elastic action of the connecting spring 23, the connecting frame 14 moves vertically downward and drives the lifting ring 10 to move vertically downward. The sealing ring block 16 on the lifting ring 10 moves vertically downward, that is, the sealing ring block 16 can impact downward the sludge squeezed and moved upward by the extrusion cylinder 21, thereby realizing secondary extrusion, that is, the sludge realizes the opposite impact extrusion effect, which greatly promotes the rapid and full separation of water in the sludge.

[0047] In addition, a positioning block 32 is slidably installed on the connecting frame 14, and a push spring II33 is fixedly connected between the positioning block 32 and the connecting frame 14. A positioning groove 26 for the positioning block 32 to be plugged in and adapted is opened on the vertical sleeve 11, and the positioning groove 26 is located below the wedge groove 31.

[0048] During the downward movement of the connecting frame 14 relative to the vertical sleeve 11, the positioning block 32 moves vertically downward with the connecting frame 14. When the positioning block 32 moves to correspond horizontally to the positioning groove 26, under the elastic thrust of the thrust spring II33, the thrust spring II33 pushes the positioning block 32 to be inserted into the vertical sleeve 11, thereby braking the vertical downward movement of the connecting frame 14 and the lifting ring 10, avoiding repeated lifting and lowering due to the elastic expansion and contraction of the connecting spring 23 after the connecting frame 14 moves down to the lowest point, avoiding the water between the extrusion cylinder 21 and the filter cylinder 15 from flowing back into the sludge, and ensuring the full separation of water in the sludge.

[0049] In summary, the present invention hooks the connecting column 9 through the hook assembly, and under the driving action of the lifting assembly, the connecting column 9 rises and drives the extrusion cylinder 21 to move upward through the vertical sleeve 11, and the connecting hook frame 12 and the push cover 4 push, so that the connecting hook frame 12 unlocks the connecting column 9, and the extrusion cylinder 21 moves down and impact-extrudes the sludge in the cylinder body 2, and the provided sealing ring block 16 can move downward relative to the extrusion cylinder 21 to achieve secondary impact extrusion of the sludge, and the degree of separation of the sludge in the organic waste liquid is significantly improved. In the present invention, the push cover 4 and the lifting sleeve 39 can be adjusted vertically, and the sliding directions of the two are opposite, so that the compression degree of the storage spring 13 and the lifting height of the extrusion cylinder 21 can be flexibly adjusted, and can be adjusted accordingly according to the amount of organic waste liquid to be impact-dehydrated, thereby ensuring that the sludge in the organic waste liquid is fully impact-extruded, dehydrated and separated, and improving the membrane separation and extraction effect of water-soluble nutrients.

[0050] It should be noted that although this specification is described according to the implementation methods, not every implementation method contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art. The above embodiments only express the preferred implementation methods of the technical solution, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention of the technical solution. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several variations, improvements and substitutions can be made, which all belong to the protection scope of the present technical solution. The protection scope of the invention of the present technical solution shall be based on the attached claims.

Claims

1. A membrane separation system for enriching water-soluble nutrients, comprising a support frame (1), a cylinder (2) being fixed on the support frame (1), a sealing bottom cover (3) being sealedly mounted on the bottom of the cylinder (2), a filter cartridge (15) being fixed inside the cylinder (2), a water outlet hole (19) being provided on the sealing bottom cover (3) and being located between the cylinder (2) and the filter cartridge (15), characterized in that: A guide column (40) is vertically fixed on the carrier frame (1), a vertical sleeve (11) is slidably sleeved on the guide column (40), an extrusion cylinder (21) vertically corresponding to the cylinder body (2) is fixed to the bottom of the vertical sleeve (11), a connecting frame (14) is vertically slidably mounted on the extrusion cylinder (21), a connecting spring (23) is fixed between the connecting frame (14) and the extrusion cylinder (21), a lifting ring (10) sealingly slidably sleeved on the extrusion cylinder (21) is fixed on the connecting frame (14), a sealing ring block (16) sealingly slidably connected to the inner wall of the filter cylinder (15) is fixed on the lifting ring (10), a locking assembly for connecting the vertical sleeve (11) is mounted on the connecting frame (14), and a push frame (23) is slidably mounted on the vertical sleeve (11) 22), an unlocking assembly for unlocking the locking assembly is connected between the lifting ring (10) and the push frame (22), a connecting column (9) is fixedly sleeved on the vertical sleeve (11), a lifting sleeve (39) is installed on the support frame (1), a force storage spring (13) sleeved on the guide column (40) is fixed at the bottom of the lifting sleeve (39), the force storage spring (13) vertically corresponds to the connecting column (9), a lifting assembly is installed on the support frame (1), a hook assembly for hooking the connecting column (9) is installed on the lifting assembly, a lifting pipe (46) is installed at the bottom of the sealing bottom cover (3), a vertical cylinder (43) connected to the lifting pipe (46) is fixed on the support frame (1), and a cylindrical separation membrane (44) is vertically fixed in the vertical cylinder (43).

2. A membrane separation system for enriching water-soluble nutrients according to claim 1, characterized in that: The lifting assembly comprises a motor (17) fixed on a supporting frame (1), a vertically arranged threaded column (18) being coaxially fixed to an output shaft of the motor (17), and a lifting frame (6) slidably connected to the supporting frame (1) being threadedly sleeved on the threaded column (18).

3. A membrane separation system for enriching water-soluble nutrients according to claim 2, characterized in that: The hook assembly comprises a pair of connecting hook frames (12) rotatably mounted on the lifting frame (6), a torsion spring (35) being fixed between the connecting hook frames (12) and the lifting frame (6), a wedge-shaped hook claw (34) vertically corresponding to the connecting column (9) being fixed to the lower end of the connecting hook frame (12), a hook groove (25) being adapted to be engaged with the wedge-shaped hook claw (34) being provided on the connecting column (9), a push cover (4) being installed on the supporting frame (1), an inner conical surface (27) vertically corresponding to the upper end of the connecting hook frame (12) being provided in the push cover (4).

4. A membrane separation system for enriching water-soluble nutrients according to claim 1, characterized in that: The locking assembly comprises a guide rod (30) slidably mounted on the connecting frame (14), a positioning wedge (28) being fixed on the guide rod (30), a wedge groove (31) being provided on the vertical sleeve (11) and being plugged and adapted to the positioning wedge (28), and a push spring I (29) being fixedly connected between the positioning wedge (28) and the connecting frame (14).

5. A membrane separation system for enriching water-soluble nutrients according to claim 4, characterized in that: The unlocking assembly comprises a transmission frame (7) rotatably mounted on a lifting ring (10); the push frame (22) vertically corresponds to the positioning wedge (28); a tension spring (24) is fixed between the push frame (22) and the connecting column (9); a strip hole (41) is provided on the transmission frame (7); a pin column (8) slidably adapted to the strip hole (41) is fixed on the push frame (22); a vertical strip hole (20) is provided on the support frame (1); and a dial plate (42) extending into the vertical strip hole (20) is fixed to one end of the transmission frame (7) away from the push frame (22).

6. A membrane separation system for enriching water-soluble nutrients according to claim 4, characterized in that: A positioning plug block (32) is slidably mounted on the connecting frame (14), a push spring II (33) is fixedly connected between the positioning plug block (32) and the connecting frame (14), and a positioning groove (26) for the positioning plug block (32) to be plugged and adapted is provided on the vertical sleeve (11), and the positioning groove (26) is located below the wedge groove (31).

7. A membrane separation system for enriching water-soluble nutrients according to claim 3, characterized in that: A cylinder (5) is fixed on the support frame (1), a free end of the cylinder (5) is fixed to the push cover (4), and the lifting sleeve (39) slides through the push cover (4).

8. A membrane separation system for enriching water-soluble nutrients according to claim 7, characterized in that: A central gear (37) is rotatably mounted on the support frame (1), and a rack I (36) and a rack II (38) are respectively meshed and connected on both sides of the central gear (37), the rack I (36) is fixed to the thrust cover (4), and the rack II (38) is fixed to the lifting sleeve (39).

9. A membrane separation system for enriching water-soluble nutrients according to claim 1, characterized in that: A lifting pump (45) is fixed on the carrier frame (1), the inlet end of the lifting pump (45) is connected to the lifting pipe (46), the outlet end of the lifting pump (45) is connected to the vertical cylinder (43) through a delivery pipe (48), and a check valve (47) is installed on the delivery pipe (48).

10. A membrane separation system for enriching water-soluble nutrients according to claim 9, characterized in that: The top of the cylindrical separation membrane (44) is connected to a drainage pipe (51) extending to the outside of the vertical cylinder (43), and the lower side wall of the vertical cylinder (43) is connected to a discharge pipe (49), on which an electric control valve (50) is installed.

Images