An RO purification device and method for the blowdown of circulating cooling water in a power plant

Abstract

The present invention relates to a reverse osmosis purification device and method for the blowdown water of the circulating water in a power plant. Aiming at the problem in the prior art that the penetration blockage is easily caused by too tight winding during the replacement and winding of the membrane roll, the following scheme is proposed. It includes a bearing frame, and the bearing frame includes two side vertical plates that are parallel to each other and vertically placed on the ground. Between the two side vertical plates, two rows of reverse osmosis tube modules with the same structure are inserted and fixed. The reverse osmosis tube module includes a pressure-resistant main sleeve horizontally fixed between the two side vertical plates, and a fully enclosed spiral plug is screwed on the inner circumferential wall of the right end of the pressure-resistant main sleeve. The present invention can not only make the installation of the reverse osmosis membrane roll more convenient, but also avoid the reverse osmosis membrane roll sticking too tightly to the surface of the pumping core tube during winding, thus blocking the strip-shaped water inlet holes. Instead, a gap is reserved to allow the filtered water to enter the inside of the pumping core tube.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification, and particularly relates to a reverse osmosis purification device and method for the blowdown of circulating water in a power plant. Background Art

[0002] Reverse osmosis is a process of separating water molecules from a water body from solutes by using a selective membrane that can only pass water but not solutes with a driving force higher than the osmotic pressure; nowadays, it has been widely used in water treatment technologies.

[0003] Currently, when a power plant treats circulating water, it needs to purify the wastewater so that it can be recycled, and reverse osmosis purification is a relatively important step in wastewater treatment. However, the existing reverse osmosis purification devices have some defects; since the reverse osmosis membrane roll needs to be wound around the core pipe for pumping water, if the winding is too tight, it will cause the water inlet to be blocked too tightly, resulting in poor water outlet. If the winding is too loose, it will not achieve the filtering effect. Therefore, we propose a new reverse osmosis purification device and purification method to solve the problem of the winding tightness of the membrane roll. Summary of the Invention

[0004] Aiming at the technical problem that it is easy to cause osmotic blockage due to too tight winding when replacing and winding the membrane roll in the prior art, the present invention adopts the following technical solutions:

[0005] A reverse osmosis purification device for the blowdown water of the circulating water in a power plant, comprising a bearing frame. The bearing frame includes two side vertical plates that are parallel to each other and vertically placed on the ground. Between the two side vertical plates, two rows of reverse osmosis tube modules with the same structure are inserted and fixed. The reverse osmosis tube module includes a pressure-resistant main sleeve horizontally fixed between the two side vertical plates. A fully enclosed spiral plug is screwed on the inner circumferential wall of the right end of the pressure-resistant main sleeve. And a water pumping core tube with a reverse osmosis membrane roll wound on its outer wall is slidably inserted into the inner wall of the pressure-resistant main sleeve. A membrane roll fixing groove parallel to its own axis is reserved on the outer wall of the water pumping core tube. Strip-shaped water inlet holes are arranged on the outer wall of the water pumping core tube at equal distances and staggered. And annular convex ribs are reserved between adjacent two strip-shaped water inlet holes on the outer wall of the water pumping core tube. The circumferential surface of the annular convex rib is higher than the protruding position of the membrane roll fixing groove to ensure that the outer surface is smooth without penetrating convex ribs after the reverse osmosis membrane roll is wound. High-hat-shaped resisting parts for clamping and fixing the reverse osmosis membrane roll are respectively fixed at both ends of the water pumping core tube. An annular sealing gland is arranged at one end of the pressure-resistant main sleeve away from the spiral plug. And a horn tube is inserted into the circumferential outer wall of the pressure-resistant main sleeve for injecting the sewage to be filtered into the interior of the pressure-resistant main sleeve. And an extended platform is fixed near the bottom on the front surface of the bearing frame. A pressure water injection mechanism is arranged on the upper surface of the extended platform. The pressure water injection mechanism includes a plunger barrel fixed near the bottom on the front surface of the bearing frame. The plunger barrel is a horizontally placed cylindrical structure with a cavity inside. And a plunger block is slidably connected inside the plunger barrel. The water outlet end of the plunger barrel is connected to the inlet of the horn tube.

[0006] A further setting of the present invention is that cross beam tie rods parallel to each other are respectively fixed on the front and rear sides at the bottom of the bearing frame. And the pressure water injection mechanism further includes a barrel support frame fixed on the cross beam tie rod on the front surface of the bearing frame. A strip-shaped sliding hole is opened near the bottom on the circumferential outer package of the plunger barrel. The direction of the strip-shaped sliding hole is consistent with the axial direction of the plunger barrel. And a sliding block column extending into the strip-shaped sliding hole is fixed on the outer wall of the plunger block. A movable shaft is reserved at the bottom end of the sliding block column. A connecting rod is rotatably connected to the outer wall of the movable shaft. An extended platform is also fixed near the bottom on the front surface of the bearing frame. And a shaft hole is opened in the middle of the upper surface of the extended platform. And an anti-drop bearing is embedded in the shaft hole. A transmission shaft is rotatably connected in the anti-drop bearing. A worm wheel disc and a counterweight are respectively fixed at the upper and lower ends of the transmission shaft. A connecting sleeve block is arranged near the circumferential edge on the upper surface of the worm wheel disc. The other end of the connecting rod is rotatably sleeved on the connecting sleeve block. The reciprocating sliding of the sliding block column and the plunger block is realized by the rotation of the worm wheel disc. A reduction motor is also fixed on the upper surface of the extended platform. And a worm gear sleeve meshing with the worm wheel disc is fixed at the top end of the output shaft of the reduction motor. Due to the setting of the worm gear sleeve and the worm wheel disc, a strong and stable power output can be provided for the reciprocating movement of the sliding block column, and then the two ends of the plunger barrel are alternately used to pump and drain the sewage to be filtered, so as to form a continuous operation.

[0007] A further arrangement of the present invention is that the position of the plunger barrel is in the middle, and a mutually symmetrical one-way water outlet valve one and one-way water outlet pipe valve two are respectively fixed near the two ends of the plunger barrel close to the bottom; and the water inlets of the horn pipes in the middle of the pressure-resistant main sleeve close to the bottom row all face to the right, the water inlets of the horn pipes in the middle of the pressure-resistant main sleeve close to the top row face to the left, and two mutually parallel communication C pipes with the inlets facing the plunger barrel are respectively fixed at the inlets of the horn pipes in the top row and the horn pipes in the bottom row, and mutually symmetrical space connecting pipes are respectively fixed between the inlets of the two communication C pipes and the inlets of the one-way water outlet valve one and the one-way water outlet pipe valve two; one-way water inlet pipes are arranged near the two ends of the plunger barrel close to the top.

[0008] A further arrangement of the present invention is that communication holes are opened at both ends of the pressure-resistant main sleeve, and a reflux X pipe is connected between the two communication holes, and all the reflux X pipes in the upper row and all the reflux X pipes in the lower row are symmetrically distributed, and a flow regulating valve is arranged at the water outlet of the reflux X pipe, and the water outlet end of the reflux X pipe is located at one end close to the spiral plug; and a reflux M pipe connecting the water outlets of all the flow regulating valves is fixed on one side of the bearing frame close to the flow regulating valve; by arranging the reflux X pipe and the flow regulating valve, the water flow pressure in each pressure-resistant main sleeve can be adjusted during filtration to ensure the circulation of the sewage inside the pressure-resistant main sleeve, and then the larger stains on the outermost layer can be flushed and circulated out, improving the service life of the reverse osmosis membrane roll.

[0009] A further arrangement of the present invention is that main pipe through holes adapted to the outer diameter of the pressure-resistant main sleeve are opened on the two side vertical plates of the pressure-resistant main sleeve, and strip-shaped notches adapted to the reflux X pipe are opened at the circumferential edges of the main pipe through holes, and two mutually centrosymmetric inclined insertion holes are opened in the middle of the pressure-resistant main sleeve, and a single inclined insertion hole obliquely penetrates into the pressure-resistant main sleeve; the sewage from the horn pipe can be obliquely shot towards both ends of the pressure-resistant main sleeve to evenly disperse the sewage; by arranging the strip-shaped notches and the main pipe through holes, the overall bearing frame can be strengthened and stabilized.

[0010] A further arrangement of the present invention is that a motor seat and two support arm rods are fixed at the bottom of one side of the bearing frame close to the annular sealing gland, and an ultimate discharge C pipe is fixed between the two support arm rods, a plurality of converging joints are fixed on the outer wall of the ultimate discharge C pipe, the inlets of the converging joints are all sleeved with conveying hoses, and the other ends of the conveying hoses are connected to the water outlet end of the pumping core pipe; an auxiliary suction pump is fixed on the motor frame, and the inlet end of the auxiliary suction pump is connected to the outlet end of the ultimate discharge C pipe; by arranging the auxiliary suction pump, the penetration speed can be increased as needed.

[0011] A further arrangement of the present invention is that a sealing plug is fixed at one end of the pumping core pipe close to the spiral plug, and a self-locking thread is reserved on the inner circumferential wall at one end of the pressure-resistant main sleeve close to the spiral plug. An annular groove is reserved on one side of the spiral plug close to the high-hat-shaped blocking member, and a thrust ball bearing is fixed in the annular groove. A plurality of tightening springs are fixed on one side of the thrust ball bearing close to the high-hat-shaped blocking member, and a tightening block is fixed at one end of each tightening spring close to the high-hat-shaped blocking member; by arranging the tightening springs and the tightening blocks, when installing, the core rod sleeved with the reverse osmosis membrane roll can be tightly fixed inside the pressure-resistant main sleeve in cooperation with the annular sealing gland.

[0012] A further arrangement of the present invention is that spiral water guiding ribs with a spiral structure are arranged on the inner circumferential wall of the pressure-resistant main sleeve, and the cross section of the spiral water guiding ribs is in a right trapezoidal structure. The outer diameter of the high-hat-shaped blocking member is smaller than the inner diameter of the spiral water guiding ribs, ensuring that the pumping core pipe sleeved with the high-hat-shaped blocking member and the reverse osmosis membrane roll can be smoothly drawn out and pushed into the pressure-resistant main sleeve.

[0013] A further arrangement of the present invention is that a plurality of hinged notches are formed on the outer circumferential wall of the annular sealing gland, and an L-shaped manual clamping block is rotatably connected to the shaft rod of each hinged notch. A protruding stud is arranged at one end of the L-shaped manual clamping block away from the hinge point. Three receiving clamping blocks are fixed on one side of the annular sealing gland away from the pressure-resistant main sleeve, and a slot adapted to the protruding stud is formed at the top of the receiving clamping block; a hook rod is hinged to the back of the L-shaped manual clamping block; a thickened thick pipe head is reserved at one end of the pressure-resistant main sleeve close to the annular sealing gland, and a buckle slot adapted to the hook rod is formed on the thick pipe head.

[0014] A reverse osmosis purification method for the circulating cooling water blowdown of a power plant includes the following steps:

[0015] S1: Before the device is started, first insert two one-way inlet pipes into the bottom of the sewage pool to be treated through two water pipes, and then connect the reflux M pipe to a water pipe two and also insert it into the bottom of the sewage pool; before starting the pressure injection mechanism, first disassemble one of the space connecting pipes, and then start the pressure injection mechanism until the inside of the plunger block is filled with sewage, and then connect the space connecting pipe back to its original position and wait for the official start;

[0016] S2: Start the reduction motor in the pressure injection mechanism. At this time, under the reciprocating push of the connecting rod, high-pressure water is alternately injected into the middle of the upper and lower rows of reverse osmosis tube modules in the two space connecting pipes; at this time, the sewage is quickly and evenly transported to both ends of the pressure-resistant main sleeve through the horn pipe and the spiral water guiding ribs in the pressure-resistant main sleeve until the inside of the pressure-resistant main sleeve is filled. At this time, a part of the sewage passes through the filtration of the reverse osmosis membrane rolls layer by layer and enters the pumping core pipe, and finally is discharged into the filtered pool through the auxiliary suction pump;

[0017] S3: Simultaneously open and finely adjust the flow regulating valves at the ends of each pressure-resistant main pipe sleeve to adjust the water return volume. At this time, the stains blocked on the outer layer of the reverse osmosis membrane roll will be slowly flushed back to the sewage pool.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. By providing the membrane roll fixing groove and the annular convex rib on the outer wall of the pumping core pipe, it is not only more convenient to install the reverse osmosis membrane roll, but also can avoid the reverse osmosis membrane roll sticking too tightly to the surface of the pumping core pipe during winding, which may block the strip-shaped water inlet holes. Instead, a gap is reserved to allow the filtered water to enter the inside of the pumping core pipe.

[0020] 2. By providing the one-way water outlet valve I and the one-way water outlet pipe valve II near the bottom end of the plunger barrel, it can ensure that no air is squeezed into the space connecting pipe when the piston is squeezed. Moreover, a certain amount of water is introduced alternately on both sides each time, which can disperse the extrusion force, improve the stability of the device operation, and ensure the stability of the water output.

[0021] 3. By providing the snap groove and the hook rod, mechanical self-locking is formed, which not only improves the sealing effect, but also improves the overall corrosion resistance of the device and the operation convenience, and is also convenient for later flushing and maintenance. Description of the Drawings

[0022] Figure 1 is the overall structural schematic diagram of the present invention;

[0023] Figure 2 is the front view structural schematic diagram of the present invention;

[0024] Figure 3 is the structural schematic diagram of a single reverse osmosis tube module of the present invention in the working state;

[0025] Figure 4 is the semi-sectional three-dimensional structural schematic diagram of the pressure water injection mechanism in the present invention;

[0026] Figure 5 is the structural schematic diagram of the bearing frame in the present invention;

[0027] Figure 6 is the bottom view three-dimensional structural schematic diagram of the present invention;

[0028] Figure 7 is the side view of the present invention;

[0029] Figure 8 is the overall structural schematic diagram of the reverse osmosis tube module in the present invention;

[0030] Figure 9 is the structural schematic diagram of the annular sealing gland in the open state in the present invention;

[0031] Figure 10 It is a schematic diagram of the half-sectional three-dimensional structure of the reverse osmosis tube module in the present invention;

[0032] Figure 11 In the present invention Figure 10 It is an enlarged schematic diagram of part A in the present invention;

[0033] Figure 12 It is an exploded view of the reverse osmosis tube module in the present invention.

[0034] In the figure: 1. Bearing frame; 101. Cross beam tie rod; 102. Strip-shaped notch; 103. Main pipe perforation; 104. Barrel support frame; 2. Annular sealing gland; 201. Hook rod; 202. L-shaped manual clamping block; 203. Receiving clamping block; 3. Delivery hose; 4. Ultimate discharge C pipe; 5. Confluence joint; 6. Support arm rod; 7. Auxiliary suction pump; 8. Extension platform; 801. Shaft hole; 9. Worm gear disc; 10. Worm sleeve; 11. One-way water outlet valve I; 12. Reducing motor; 13. Connecting rod; 14. Slide block column; 15. Plunger barrel; 151. Strip-shaped sliding hole; 152. Plunger block; 16. Space connecting pipe; 17. One-way water inlet pipe; 18. Return M pipe; 181. Flow regulating valve; 19. Spiral plug; 20. Return X pipe; 21. Horn pipe; 22. Pressure-resistant main sleeve; 2201. Thick pipe head; 2202. Snap groove; 2203. Oblique jack; 23. One-way water outlet pipe valve II; 24. Transmission shaft; 25. Counterweight; 26. Water pumping core pipe; 261. Strip-shaped water inlet hole; 262. Annular convex rib; 263. Membrane roll fixing groove; 27. Connecting C pipe; 28. Reverse osmosis membrane roll; 29. Spiral water guiding rib; 30. Tightening spring; 31. Thrust ball bearing; 32. High hat-shaped resisting part; 33. Tightening block. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0036] In the present invention, with reference to Figure 1-11, A reverse osmosis purification device for the blowdown water of the circulating water in a power plant, including a bearing frame 1. The bearing frame 1 includes two side vertical plates that are parallel to each other and vertically placed on the ground. Between the two side vertical plates, two rows of reverse osmosis tube modules with the same structure are inserted and fixed. The reverse osmosis tube module includes a pressure-resistant main sleeve 22 horizontally fixed between the two side vertical plates. A fully enclosed spiral plug 19 is screwed on the inner circumferential wall of the right end of the pressure-resistant main sleeve 22. And a water pumping core tube 26 with a reverse osmosis membrane roll 28 wound around its outer wall is slidably inserted into the inner wall of the pressure-resistant main sleeve 22. A membrane roll fixing groove 263 parallel to its own axis is reserved on the outer wall of the water pumping core tube 26. Strip-shaped water inlet holes 261 are arranged at equal distances and staggered on the outer wall of the water pumping core tube 26. And an annular convex rib 262 is reserved between two adjacent strip-shaped water inlet holes 261 on the outer wall of the water pumping core tube 26; The circumferential surface of the annular convex rib 262 is higher than the protruding position of the membrane roll fixing groove 263, ensuring that the outer surface of the reverse osmosis membrane roll 28 is smooth without penetrating convex ribs after winding; High-cap-shaped blocking parts 32 that are symmetric to each other and used to clamp and fix the reverse osmosis membrane roll 28 are respectively fixed at both ends of the water pumping core tube 26;

[0037] An annular sealing gland 2 is arranged at one end of the pressure-resistant main sleeve 22 away from the spiral plug 19. And a horn tube 21 is inserted into the circumferential outer wall of the pressure-resistant main sleeve 22, which is used to inject the sewage to be filtered into the interior of the pressure-resistant main sleeve 22; And an extended platform 8 is fixed near the bottom of the front surface of the bearing frame 1. A pressure water injection mechanism is arranged on the upper surface of the extended platform 8. And the pressure water injection mechanism includes a plunger barrel 15 fixed near the bottom of the front surface of the bearing frame 1. The plunger barrel 15 is a horizontally placed cylindrical structure with a cavity inside. And a plunger block 152 is slidably connected inside the plunger barrel 15. The water outlet end of the plunger barrel 15 is connected to the inlet of the horn tube 21; Through the membrane roll fixing groove 263 and the annular convex rib 262 arranged on the outer wall of the water pumping core tube 26, not only can the installation of the reverse osmosis membrane roll 28 be more convenient, but also it can be avoided that the reverse osmosis membrane roll 28 adheres too tightly to the surface of the water pumping core tube 26 during winding, which may block the strip-shaped water inlet holes 261. Instead, a gap is reserved for the filtered water to enter the interior of the water pumping core tube 26.

[0038] Refer to Figure 2 and Figure 4, cross beam tie rods 101 that are parallel to each other are respectively fixed to the front and rear sides of the bottom of the bearing frame 1, and the pressure water injection mechanism further includes a barrel support frame 104 fixed to the cross beam tie rod 101 on the front side of the bearing frame 1; a strip-shaped sliding hole 151 is opened near the bottom of the outer circumference of the plunger barrel 15, the direction of the strip-shaped sliding hole 151 is consistent with the axial direction of the plunger barrel 15, and a sliding block column 14 extending into the strip-shaped sliding hole 151 is fixed to the outer wall of the plunger block 152; a movable shaft is reserved at the bottom end of the sliding block column 14, and a connecting rod 13 is rotatably connected to the outer wall of the movable shaft; an extension platform 8 is further fixed near the bottom of the front side of the bearing frame 1, and a shaft hole 801 is opened in the middle of the upper surface of the extension platform 8, and an anti-drop bearing is embedded in the shaft hole 801, and a transmission shaft 24 is rotatably connected in the anti-drop bearing. A worm gear disc 9 and a counterweight block 25 are respectively fixed to the upper and lower ends of the transmission shaft 24. A connecting sleeve block is arranged near the outer circumference of the upper surface of the worm gear disc 9, and the other end of the connecting rod 13 is rotatably sleeved on the connecting sleeve block; the reciprocating sliding of the sliding block column 14 and the plunger block 152 is realized through the rotation of the worm gear disc 9; a reduction motor 12 is further fixed to the upper surface of the extension platform 8, and a worm gear sleeve 10 meshing with the worm gear disc 9 is fixed to the top end of the output shaft of the reduction motor 12; due to the setting of the worm gear sleeve 10 and the worm gear disc 9, a strong and stable power output can be provided for the reciprocating movement of the sliding block column 14, and then the two ends of the plunger barrel 15 are alternately pumped and drained of the sewage to be filtered, so as to form a continuous operation.

[0039] Please refer to Figure 1-3 , the position of the plunger barrel 15 is in the middle, and a mutually symmetrical one-way water outlet valve one 11 and a one-way water outlet pipe valve two 23 are respectively fixed to the two ends of the plunger barrel 15 near the bottom; and the water inlets of the horn pipes 21 in the middle of the pressure-resistant main sleeve 22 near the bottom row all face to the right, the water inlets of the horn pipes 21 in the middle of the pressure-resistant main sleeve 22 near the top row face to the left, and two mutually parallel communication C pipes 27 with the inlets facing the plunger barrel 15 are respectively fixed at the inlets of the horn pipes 21 in the top row and the horn pipes 21 in the bottom row, and mutually symmetrical space connecting pipes 16 are respectively fixed between the inlets of the two communication C pipes 27 and the inlets of the one-way water outlet valve one 11 and the one-way water outlet pipe valve two 23; one-way water inlet pipes 17 are arranged at both ends of the plunger barrel 15 near the top. By setting the one-way water outlet valve one 11 and the one-way water outlet pipe valve two 23 near the bottom end of the plunger barrel 15, it can be ensured that no air is squeezed into the space connecting pipe 16 during the piston extrusion, and a certain amount of water is alternately introduced on both sides each time, which can disperse the extrusion force, improve the operation stability of the device, and ensure the stability of the water output.

[0040] Please refer to Figure 1-2 and Figure 12, communication holes are provided at both ends of the pressure-resistant main casing 22, and a reflux X pipe 20 is connected between the two communication holes. All the reflux X pipes 20 in the upper row and all the reflux X pipes 20 in the lower row are symmetrically distributed. A flow regulating valve 181 is provided at the water outlet of the reflux X pipe 20, and the water outlet end of the reflux X pipe 20 is located at one end close to the spiral plug 19. And a reflux M pipe 18 connecting the water outlets of all the flow regulating valves 181 is fixed on one side of the bearing frame 1 close to the flow regulating valve 181. By providing the reflux X pipe 20 and the flow regulating valve 181, the water flow pressure in each pressure-resistant main casing 22 can be adjusted during filtration to ensure the circulation of the sewage inside the pressure-resistant main casing 22, and then the larger stains on the outermost layer can be flushed and circulated out, improving the service life of the reverse osmosis membrane roll 28.

[0041] Please refer to Figure 3 and Figure 5 , main pipe through holes 103 adapted to the outer diameter of the pressure-resistant main casing 22 are provided on the two side vertical plates of the pressure-resistant main casing 22, and strip-shaped notches 102 adapted to the reflux X pipe 20 are provided at the circular edge of the main pipe through hole 103. Two axially symmetric inclined insertion holes 2203 are provided in the middle of the pressure-resistant main casing 22, and a single inclined insertion hole 2203 obliquely penetrates into the pressure-resistant main casing 22. The sewage from the horn pipe 21 can be obliquely injected towards both ends of the pressure-resistant main casing 22 to evenly disperse the sewage. By providing the strip-shaped notch 102 and the main pipe through hole 103, the overall bearing frame 1 can be strengthened and stabilized.

[0042] Please refer to Figure 1 and Figure 8 , a motor base and two support arm rods 6 are fixed at the bottom of one side of the bearing frame 1 close to the annular sealing gland 2. An ultimate discharge C pipe 4 is fixed between the two support arm rods 6. A plurality of converging joints 5 are fixed on the outer wall of the ultimate discharge C pipe 4. The inlet of each converging joint 5 is sleeved with a delivery hose 3, and the other end of the delivery hose 3 is connected to the water outlet end of the pumping core pipe 26. An auxiliary suction pump 7 is fixed on the motor frame, and the inlet end of the auxiliary suction pump 7 is connected to the outlet end of the ultimate discharge C pipe 4. By providing the auxiliary suction pump 7, the penetration speed can be increased as needed.

[0043] Please refer to Figure 10-11, a sealing plug is fixed at one end of the water extraction core pipe 26 close to the spiral plug 19, and a self-locking thread is reserved on the inner circumferential wall at one end of the pressure-resistant main sleeve 22 close to the spiral plug 19. An annular groove is reserved on one side of the spiral plug 19 close to the high-hat-shaped resisting member 32, and a thrust ball bearing 31 is fixed in the annular groove. A plurality of tightening springs 30 are fixed on one side of the thrust ball bearing 31 close to the high-hat-shaped resisting member 32, and a tightening block 33 is fixed at one end of each tightening spring 30 close to the high-hat-shaped resisting member 32; by arranging the tightening springs 30 and the tightening blocks 33, the core rod sleeved with the reverse osmosis membrane roll 28 can be tightly fixed inside the pressure-resistant main sleeve 22 during installation in cooperation with the annular sealing gland 2.

[0044] Please refer to Figure 10 , spiral water guiding rib strips 29 with a spiral structure are arranged on the inner circumferential wall of the pressure-resistant main sleeve 22, and the cross section of the spiral water guiding rib strips 29 is in a right trapezoid structure. The outer diameter of the high-hat-shaped resisting member 32 is smaller than the inner diameter of the spiral water guiding rib strips 29, ensuring that the water extraction core pipe 26 sleeved with the high-hat-shaped resisting member 32 and the reverse osmosis membrane roll 28 can be smoothly drawn out and pushed into the pressure-resistant main sleeve 22.

[0045] Please refer to Figure 10 and Figure 12 , a plurality of hinge slots are opened on the outer circumferential wall of the annular sealing gland 2, and an L-shaped manual clamping block 202 is rotatably connected to the shaft rod of each hinge slot. A protruding stud is arranged at one end of the L-shaped manual clamping block 202 away from the hinge point. Three receiving clamping blocks 203 are fixed on one side of the annular sealing gland 2 away from the pressure-resistant main sleeve 22. An embedding groove adapted to the protruding stud is opened at the top end of the receiving clamping block 203; a hanging hook rod 201 is hinged to the back of the L-shaped manual clamping block 202; a thickened thick pipe head 2201 is reserved at one end of the pressure-resistant main sleeve 22 close to the annular sealing gland 2, and a clamping groove 2202 adapted to the hanging hook rod 201 is opened on the thick pipe head 2201. By arranging the clamping groove 2202 and the hanging hook rod 201, mechanical self-locking is formed, which not only improves the sealing effect but also improves the corrosion resistance effect and operation convenience of the whole device, and is also convenient for later flushing and maintenance.

[0046] A reverse osmosis purification method for the circulating cooling water blowdown of a power plant includes the following steps:

[0047] S1: Before the device starts, first insert two one-way inlet pipes 17 into the bottom of the sewage pool to be treated through two water pipes 1, and then connect the return M pipe 18 to a water pipe 2 and also insert it into the bottom of the sewage pool; before starting the pressure injection mechanism, first disassemble one of the space connecting pipes 16, and then start the pressure injection mechanism until the inside of the plunger block 152 is filled with sewage, and then connect the space connecting pipe 16 back to its original position and wait for formal start;

[0048] S2: Start the reduction motor 12 in the pressure injection mechanism. At this time, under the reciprocating push of the connecting rod 13, high-pressure water is alternately injected into the middle of the upper and lower rows of reverse osmosis tube modules in the two space connecting pipes 16. At this time, the sewage is quickly and evenly conveyed to both ends of the pressure-resistant main casing 22 through the horn tube 21 and the spiral water guide ribs 29 in the pressure-resistant main casing 22 until the inside of the pressure-resistant main casing 22 is filled. At this time, a part of the sewage passes through the filtration of the reverse osmosis membrane rolls 28 layer by layer and enters the pumping core pipe 26, and finally is discharged into the filtered pool through the auxiliary suction pump 7.

[0049] S3: At the same time, open and finely adjust the flow regulating valve 181 at the end of each pressure-resistant main casing 22 to adjust the amount of water returned. At this time, the stains blocked on the outer layer of the reverse osmosis membrane roll 28 will be slowly washed back into the sewage pool.

[0050] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A reverse osmosis purification device for circulating water and sewage of a power plant, comprising a bearing frame (1), wherein the bearing frame (1) comprises two side vertical plates which are parallel to each other and vertically placed on the ground, and two upper and lower rows of reverse osmosis pipe modules with the same structure are inserted and fixed between the two side vertical plates, and the reverse osmosis pipe modules comprise a pressure-resistant main casing (22) which is horizontally fixed between the two side vertical plates, characterized in that: A fully enclosed spiral plug (19) is screwed to the inner wall of the right end of the pressure-resistant main sleeve (22), and a water extraction core tube (26) with a reverse osmosis membrane roll (28) wound on the outer wall is slidably inserted into the inner wall of the pressure-resistant main sleeve (22). The outer wall of the water extraction core tube (26) is reserved with a membrane roll fixing groove (263) parallel to its own axis line. The outer wall of the water extraction core tube (26) is provided with strip water inlet holes (261) distributed at equal distances and staggered, and the outer wall of the water extraction core tube (26) is reserved with annular ridges (262) between two adjacent strip water inlet holes (261); the circumferential surface of the annular ridge (262) is higher than the protruding position of the membrane roll fixing groove (263), ensuring that the outer surface of the reverse osmosis membrane roll (28) is smooth and has no penetrating ridges after being wound; the two ends of the water extraction core tube (26) are respectively fixed with mutually symmetrical A high hat-shaped stopper (32) is used to clamp and fix the reverse osmosis membrane roll (28); an annular sealing cover (2) is provided at one end of the pressure-resistant main sleeve (22) away from the spiral plug (19), and a bullhorn tube (21) is inserted into the circumferential outer wall of the pressure-resistant main sleeve (22) for injecting sewage to be filtered into the interior of the pressure-resistant main sleeve 22; and an extension platform (8) is fixed on the front side of the supporting frame (1) near the bottom, and a pressure water injection mechanism is provided on the upper surface of the extension platform (8), and the pressure water injection mechanism includes a plunger barrel (15) fixed on the front side of the supporting frame (1) near the bottom, the plunger barrel (15) is a horizontally placed cylindrical structure with a cavity inside, and a plunger block (152) is slidably connected inside the plunger barrel (15), and the water outlet end of the plunger barrel (15) is connected to the inlet of the bullhorn tube (21).

2. A reverse osmosis purification device for circulating water and sewage from a power plant according to claim 1, characterized in that: The bottom of the supporting frame (1) is respectively fixed with mutually parallel crossbeam pull rods (101) on the front and rear sides, and the pressure water injection mechanism also includes a barrel support frame (104) fixed on the crossbeam pull rod (101) on the front side of the supporting frame (1); a strip-shaped sliding hole (151) is opened on the outer circumference of the plunger barrel (15) near the bottom end, the direction of the strip-shaped sliding hole (151) is consistent with the axial direction of the plunger barrel (15), and a slider column (14) extending into the strip-shaped sliding hole (151) is fixed on the outer wall of the plunger block (152); a movable shaft is reserved at the bottom end of the slider column (14), and a connecting rod (13) is rotatably connected to the outer wall of the movable shaft; an extension platform (8) is also fixed on the front side of the supporting frame (1) near the bottom end, An axial hole (801) is formed in the middle of the upper surface of the extension platform (8), and an anti-slip bearing is embedded in the axial hole (801); a transmission shaft (24) is rotatably connected to the anti-slip bearing; a worm wheel (9) and a counterweight (25) are respectively fixed at the upper and lower ends of the transmission shaft (24); a connecting sleeve block is provided on the upper surface of the worm wheel (9) near the circumferential edge; the other end of the connecting rod (13) is rotatably sleeved on the connecting sleeve block; the reciprocating sliding of the slider column (14) and the plunger block (152) is achieved by the rotation of the worm wheel (9); a reduction motor (12) is also fixed on the upper surface of the extension platform (8), and a worm sleeve (10) meshing with the worm wheel (9) is fixed at the top end of the output shaft of the reduction motor (12).

3. A reverse osmosis purification device for circulating water and sewage from a power plant according to claim 2, characterized in that: The plunger barrel (15) is located in the middle, and mutually symmetrical one-way water outlet valve 1 (11) and one-way water outlet pipe valve 2 (23) are fixed at both ends of the plunger barrel (15) near the bottom; the water inlets of the ox-horn tubes (21) in the middle of the pressure-resistant main sleeve (22) near the bottom row are all facing the right, and the water inlets of the ox-horn tubes (21) in the middle of the pressure-resistant main sleeve (22) near the top row are facing the left, and two mutually parallel connecting C tubes (27) with inlets facing the plunger barrel (15) are fixed at the water inlets of the ox-horn tubes (21) in the top row and the ox-horn tubes (21) in the bottom row, and mutually symmetrical space connecting pipes (16) are fixed between the inlets of the two connecting C tubes (27) and the inlets of the one-way water outlet valve 1 (11) and the one-way water outlet pipe valve 2 (23); one-way water inlet pipes (17) are arranged at both ends of the plunger barrel (15) near the top.

4. A reverse osmosis purification device for circulating water and sewage from a power plant according to claim 3, characterized in that: Both ends of the pressure-resistant main casing (22) are provided with communicating holes, and a return X-tube (20) is connected between the two communicating holes, and all the return X-tubes (20) in the upper row are symmetrically distributed with all the return X-tubes (20) in the lower row, and a flow regulating valve (181) is provided at the water outlet of the return X-tube (20), and the water outlet end of the return X-tube (20) is located at an end close to the spiral plug (19); and a return M-tube (18) connected to the water outlets of all the flow regulating valves (181) is fixed on one side of the supporting frame (1) close to the flow regulating valve (181).

5. A reverse osmosis purification device for circulating water and sewage from a power plant according to claim 4, characterized in that: The two side vertical plates of the pressure-resistant main casing (22) are provided with main pipe perforations (103) matching the outer diameter of the pressure-resistant main casing (22), and the circumferential edge of the main pipe perforations (103) is provided with strip-shaped notches (102) matching the return X-tube (20), and the middle of the pressure-resistant main casing (22) is provided with two oblique insertion holes (2203) which are centrally symmetrical to each other, and a single oblique insertion hole (2203) is obliquely inserted into the pressure-resistant main casing (22); sewage from the ox-horn pipe 21 can be obliquely injected toward the two ends of the pressure-resistant main casing (22) to evenly disperse the sewage.

6. A reverse osmosis purification device for circulating water and sewage from a power plant according to claim 5, characterized in that: A motor seat and two support arms (6) are fixed to the bottom of one side of the supporting frame (1) close to the annular sealing gland (2), and a final discharge C tube (4) is fixed between the two support arms (6). A plurality of confluence joints (5) are fixed to the outer wall of the final discharge C tube (4), and a delivery hose (3) is sleeved at the inlet of each of the confluence joints (5), and the other end of the delivery hose (3) is connected to the water outlet end of the pumping core tube (26); an auxiliary suction pump (7) is fixed to the motor frame, and the inlet end of the auxiliary suction pump (7) is connected to the outlet end of the final discharge C tube (4).

7. A reverse osmosis purification device for circulating water and sewage from a power plant according to claim 6, characterized in that: A sealing plug is fixed to one end of the pumping core tube (26) close to the spiral plug (19), and a self-locking thread is reserved on the inner circumferential wall of one end of the pressure-resistant main sleeve (22) close to the spiral plug (19). An annular groove is reserved on one side of the spiral plug (19) close to the high-hat-shaped stopper (32), and a thrust ball bearing (31) is fixed in the annular groove. A plurality of retaining springs (30) are fixed to one side of the thrust ball bearing (31) close to the high-hat-shaped stopper (32), and a retaining block (33) is fixed to one end of each retaining spring (30) close to the high-hat-shaped stopper (32).

8. A reverse osmosis purification device for circulating water and sewage from a power plant according to claim 7, characterized in that: The circumferential inner wall of the pressure-resistant main casing (22) is provided with a spiral water-guiding rib (29) with a spiral structure, and the cross section of the spiral water-guiding rib (29) is a right-angled trapezoidal structure, and the outer diameter of the high-hat-shaped blocking member (32) is smaller than the inner diameter of the spiral water-guiding rib (29).

9. A reverse osmosis purification device for circulating water and sewage from a power plant according to claim 8, characterized in that: The circumferential outer wall of the annular sealing gland (2) is provided with a plurality of hinged notches, and each hinged notch shaft rod is rotatably connected to an L-shaped manual clamp (202), and a protruding column head is arranged at one end of the L-shaped manual clamp (202) away from the hinge point, and three receiving clamps (203) are fixed on the side of the annular sealing gland (2) away from the pressure-resistant main sleeve (22), and a groove matching the protruding column head is arranged at the top of the receiving clamp (203); a hook rod (201) is hingedly connected to the back of the L-shaped manual clamp (202); and a thickened thick pipe head (2201) is reserved at one end of the pressure-resistant main sleeve (22) close to the annular sealing gland (2), and a buckle groove (2202) matching the hook rod (201) is arranged on the thick pipe head (2201).

10. A reverse osmosis purification method for circulating water and wastewater from a power plant, comprising a reverse osmosis purification device for circulating water and wastewater from a power plant as claimed in claim 9, characterized in that: The following steps are involved: S1: Before starting the device, two one-way water inlet pipes (17) are inserted into the bottom of the sewage pool to be treated through two water pipes 1, and then the return M pipe (18) is connected to a water pipe 2 and inserted into the bottom of the sewage pool; before starting the pressure water injection mechanism, one of the space connecting pipes (16) is first disassembled, and then the pressure water injection mechanism is started again until the inside of the plunger block (152) is filled with sewage, and then the space connecting pipe (16) is connected back to the original position, waiting for formal start-up; S2: Start the reduction motor (12) in the pressure water injection mechanism. At this time, under the reciprocating push of the connecting rod (13), high-pressure water is alternately injected into the middle of the upper and lower rows of reverse osmosis tube modules in the two space connecting pipes (16); at this time, the sewage is quickly and evenly transported to the two ends of the pressure-resistant main casing (22) through the ox-horn tube (21) and the spiral water-guiding ribs (29) in the pressure-resistant main casing (22) until the interior of the pressure-resistant main casing (22) is filled. At this time, a part of the sewage is filtered through the layers of reverse osmosis membrane rolls (28) and enters the water pumping core pipe (26), and finally discharged into the filtered pool through the auxiliary suction pump (7); S3: Simultaneously open and fine-tune the flow control valve (181) at the end of each pressure-resistant main pipe sleeve (22) to adjust the return water volume. At this time, the stains blocked on the outer layer of the reverse osmosis membrane roll (28) will be slowly washed back into the sewage pool.

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