Power plant reverse osmosis EDI integrated desalination equipment

Abstract

This invention relates to the field of desalination equipment technology, specifically to an integrated reverse osmosis (RO) and EDI (Electrodeionization) desalination equipment for power plants. The equipment includes a RO unit, an EDI unit, a water storage tank, and a booster unit. The RO unit is located upstream of the EDI unit. The water storage tank is connected to the concentrate outlet of the RO unit. The booster unit is connected to the inlet of the RO unit. The RO unit has at least three stages. Each RO unit includes a pressure pipe, a flange, and a mounting base. The pressure pipe has a tower-like structure, and the flange is coaxially fixedly installed at the lower end of the pressure pipe. This invention introduces a tower-like pressure pipe into the RO unit and achieves rapid replacement of the RO membrane through the flange and guide groove connection, simplifying the membrane replacement process. Furthermore, by setting the guide groove and flange to be angled, it saves positioning time during pressure pipe installation, reduces equipment downtime, and improves maintenance efficiency.

Description

Technical Field

[0001] This invention relates to the field of desalination equipment technology, specifically to an integrated desalination equipment for power plants using reverse osmosis and EDI. Background Technology

[0002] Power plant reverse osmosis EDI integrated desalination equipment combines reverse osmosis (RO) and electrodeionization (EDI) technologies, and is a highly efficient and environmentally friendly water treatment system widely used in power plant boiler feedwater systems. The working principle of power plant reverse osmosis EDI integrated desalination equipment is mostly based on membrane separation technology, in which the reverse osmosis membrane is the key core component. In order to ensure the proper operation of the reverse osmosis membrane, regular maintenance and replacement are necessary. However, due to the harsh working environment of the reverse osmosis membrane, the membrane surface is prone to scaling, contamination or aging, which leads to a decrease in its filtration effect, thus requiring regular replacement.

[0003] In existing reverse osmosis EDI desalination equipment, the replacement of reverse osmosis membranes usually requires shutdown, and the entire replacement process is cumbersome and time-consuming. The replacement process typically includes steps such as shutting down the equipment, disassembling the reverse osmosis unit, and removing and replacing the reverse osmosis membrane. This not only increases the downtime of the equipment but also places high demands on the labor intensity of the operators. At the same time, in some designs, there are significant difficulties in installing and disassembling the connecting parts between the pressure pipe and the reverse osmosis membrane, resulting in long maintenance cycles and affecting the normal operating efficiency of the power plant. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated reverse osmosis EDI desalination device for power plants, in order to solve the problem that the reverse osmosis unit of the integrated reverse osmosis EDI desalination device for power plants requires a relatively complex disassembly procedure and a lot of manual intervention from operators, which increases the difficulty of operation and labor costs.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An integrated reverse osmosis (RO) and EDI (Electrodeionization) desalination system for power plants includes a RO unit, an electrodeionization unit, a water storage tank, and a booster unit. The RO unit is located upstream of the electrodeionization unit. The water storage tank is connected to the concentrate outlet of the RO unit. The booster unit is connected to the inlet of the RO unit. The RO unit has at least three stages. Specifically, the RO unit includes a pressure pipe, a flange, and a mounting base. The pressure pipe has a tower-like structure, and the flange is coaxially fixedly installed at the lower end of the pressure pipe. The lower end is the water inlet. The water outlet and concentrate outlet of the pressure pipe are respectively located on the upper end face and upper side wall of the pressure pipe. The top of the mounting base is provided with a mounting groove, and the side wall of the mounting groove is provided with a guide groove. The mounting groove and the guide groove both pass through the front and rear ends of the mounting base. The flange is slidably installed in the guide groove, and the lower end of the flange is in contact with the bottom of the mounting groove. The upper end face of the mounting base is provided with a pressure component. The pressure component is slidably connected to the upper end face of the flange, and the pressure component is used to provide downward pressure to the flange. By installing a flange on the pressure pipe and a guide groove on the mounting base, when replacing the reverse osmosis membrane inside the pressure pipe, the pressure exerted on the flange by the pressure assembly is released. At this time, the water inlet of the reverse osmosis unit is cut off, and the flange can be pushed to move in the guide groove, thereby removing the pressure pipe. By setting the pressure pipe as a tower structure, after the pressure pipe is removed, the reverse osmosis membrane inside the pressure pipe can be removed simply by pulling it out from the bottom of the pressure pipe. Then, the reverse osmosis membrane can be inserted from the bottom end of the pressure pipe to complete the replacement of the reverse osmosis membrane. After the reverse osmosis membrane is replaced, the flange is inserted into the guide groove to connect the water inlet of the reverse osmosis unit. This simplifies the maintenance process of the reverse osmosis unit and reduces the maintenance time of the reverse osmosis unit.

[0007] Preferably, the guide channel includes a straight section and an inclined section. The straight section is located behind the inclined section. The inclined section forms an angle with the bottom wall of the mounting groove, and the front end of the inclined section is lower than the rear end. The upper surface of the flange is provided with an inclined surface. The inclination angle of the inclined surface is the same as that of the inclined section, but the length of the inclined surface of the inclined section is longer than that of the flange. By setting the guide channel as an inclined section and a straight section, and providing an inclined surface at the upper end of the flange, when the flange is inserted into the guide channel, the inclined surface cooperates with the inclined section. The inclined section provides a downward pressure component to the inclined surface, thereby ensuring the fit between the lower end of the flange and the base, avoiding leakage of salt solution from the flange and the bottom of the mounting groove during operation, and ensuring the pressure in the pressure pipe. At the same time, through the sliding cooperation between the inclined surface and the inclined section, when the flange cannot be pushed, it means that the pressure pipe has been installed in the designated position and no further positioning is required, thus saving the positioning time when installing the pressure pipe and further reducing the maintenance time of the reverse osmosis unit.

[0008] Preferably, the pressure assembly includes an adjusting bolt, a wedge block, and a first spring. The flange has slots on both its left and right sides, the slots completely penetrating the upper and lower ends of the flange. A pressure-bearing surface is provided on the front wall of the slot, forming an angle with the lower end face of the flange. The lower end width of the slot is smaller than the upper end width. The wedge block is slidably connected to the pressure-bearing surface. The wedge block has mounting holes penetrating both ends. The adjusting bolt is rotatably installed in the mounting holes, and its lower end extends into the mounting base. The lower end of the adjusting bolt is threadedly connected to the mounting base. The head of the adjusting bolt is located on the upper side of the wedge block. The first spring is sleeved on the adjusting bolt, and its upper and lower ends are slidably connected to the wedge block and the head of the adjusting bolt, respectively. By setting a pressure-bearing surface on the flange, when the adjusting bolt is screwed down, the first spring is compressed. The first spring pushes the wedge block downward, and the front end face of the wedge block slides relative to the pressure-bearing surface. At the same time, the elastic force of the first spring is applied to the pressure-bearing surface. When the pressure-bearing surface is under force, the flange is subjected to a downward pressing force and a horizontal force towards the front end. Under the action of the horizontal force, the flange moves towards the front end of the inclined section, further providing a downward pressing force to the flange. This avoids the problem of salt solution leaking from the flange and the bottom of the mounting groove during operation, ensuring the pressure... The pressure inside the force tube; simultaneously, by setting a No. 1 spring between the head of the adjusting bolt and the wedge block, when the adjusting spring is screwed into the mounting base, the wedge block directly feeds back the elastic force of the No. 1 spring to the pressure-bearing surface. During the process, the downward pressure on the flange gradually increases, avoiding excessive downward pressure on the flange, which would cause excessive friction between the flange and the bottom wall of the mounting groove, resulting in the flange being unable to start moving towards the front end of the inclined section. This ensures the smoothness of the relative sliding action between the flange and the inclined section, and between the flange and the mounting groove, thereby ensuring the positioning accuracy of the flange and the fit between the flange and the mounting groove.

[0009] Preferably, the lower end face of the mounting base is provided with a bottom shell, the outlet of the pressurizing unit is connected to the inner side wall of the bottom shell, the bottom of the mounting groove is provided with a connecting hole connecting to the inside of the bottom shell, a closed tube is coaxially slidably installed in the connecting hole, the bottom of the closed tube is closed, the side wall of the closed tube is provided with a connecting section and a stopping section, the connecting section is located above the stopping section, the side wall of the connecting section is provided with a ring array of multiple through holes penetrating the inner and outer sides, a second spring is coaxially provided at the lower end of the closed tube, the upper and lower ends of the second spring are fixedly connected to the closed tube and the bottom shell respectively, a limiting flange is provided at the lower outer edge of the closed tube, the lower end of the adjusting bolt is slidably connected to the upper end face of the limiting flange, when the upper end face of the limiting flange is in contact with the lower end face of the mounting base, the upper end face of the closed tube is located below the bottom wall of the mounting groove.

[0010] With the setting of the limiting flange, when the adjusting bolt is screwed into the mounting base, the lower end face of the adjusting bolt provides a downward thrust to the limiting flange. The limiting flange moves downward and compresses the second spring. At this time, the cut-off section is located in the connecting hole, and the salt solution in the bottom shell cannot enter the connecting hole, thus preventing it from entering the pressure pipe. This avoids the problem of salt solution leakage caused by introducing salt solution into the pressure pipe before the flange and mounting groove meet the requirements or the pressure pipe is installed properly. When the adjusting bolt is screwed into the mounting base, the first spring provides force to the wedge block. As the pressure gradually increases, the pressure between the flange and the mounting groove gradually increases, and the sealing between the flange and the mounting groove is gradually improved. When the length of the adjusting bolt screwed into the mounting seat reaches the point where it connects with the inside of the bottom shell through the hole, the salt solution in the bottom shell enters the connecting hole through the connecting hole, and at this time, the desalination work of this stage of reverse osmosis unit begins. This control method does not require a valve body to be installed between the outlet of the booster unit and the inlet of the reverse osmosis unit, and the salt solution cannot be introduced into the pressure pipe before a seal is formed between the flange and the mounting groove, thus improving the reliability of the equipment.

[0011] Furthermore, when the adjusting bolt is screwed out of the mounting base, the elastic potential energy of the second spring is released, pushing the closed tube upward until the through hole is completely inserted into the connection hole. The salt solution in the bottom shell cannot enter the connection hole through the through hole, thereby cutting off the pressure pipes of the booster unit and the reverse osmosis unit. This avoids the problem of the sealing effect between the flange and the mounting groove decreasing after the adjusting bolt is screwed out to a certain length, and the salt solution leaking from the flange and the mounting groove. This ensures the reliability of the equipment, and the installation and operation of the pressure pipe can be carried out simultaneously, improving work efficiency.

[0012] Furthermore, on the outer wall of the multiple through-holes on the circumferential array and the connecting section, when the salt solution in the bottom shell enters the connecting hole through the multiple through-holes, the salt solutions in opposite directions impact each other and cancel each other out the impact force of the water flow. This avoids the problem of excessive impact force of the salt solution entering the pressure pipe, which could damage the reverse osmosis membrane, thus ensuring the reliability of the equipment and reducing the noise during equipment operation.

[0013] Preferably, a conversion groove is coaxially provided on the inner bottom wall of the bottom shell, and a conversion section is coaxially provided on the lower end face of the closed tube. The outer diameter of the conversion section is the same as the inner diameter of the conversion groove. When the limiting flange is in contact with the mounting base, the minimum distance from the upper end face of the limiting flange to the connecting hole is H1, and the minimum distance from the upper end of the conversion groove to the lower end of the conversion section is H2, wherein H1≥H2. A conversion port is provided at the lower end of the conversion groove, and the conversion port is connected to the inlet of the next stage reverse osmosis unit. The conversion port of the last stage reverse osmosis unit is connected to the inlet of the electro-deionization unit.

[0014] With the conversion slot, after the adjusting bolt is unscrewed from the mounting base, the closed tube moves upward under the elastic force of the second spring until the upper end face of the limiting flange is in contact with the bottom surface of the mounting base. At this time, the conversion section slides out completely from the conversion slot, and the salt solution in the bottom shell enters the next stage of reverse osmosis unit through the conversion port at the lower end of the conversion slot. The next stage of reverse osmosis unit can continue to perform desalination work, avoiding the need for the equipment to run simultaneously when performing maintenance on a certain stage of reverse osmosis unit, which would cause the downstream equipment to stop or be damaged, thus ensuring work efficiency.

[0015] Preferably, the lower end face of the flange is provided with multiple annular protrusions. These annular protrusions are coaxial with and equidistant from the inner wall of the pressure pipe. The cross-section of each annular protrusion is semi-circular, and all annular protrusions are slidably connected to the bottom wall of the mounting groove. By providing multiple annular protrusions on the lower end face of the flange, the friction between the flange and the mounting groove is reduced, improving the smoothness of the relative sliding motion between them. Furthermore, if the entire lower end face of the flange and the bottom wall of the mounting groove are directly used as the sealing surface, the machining accuracy requirements for these two surfaces are high, increasing the production and maintenance costs of the equipment. By providing multiple annular protrusions, a labyrinth seal structure is formed between the flange and the mounting groove, improving the sealing performance between the lower end face of the flange and the bottom wall of the mounting groove.

[0016] Preferably, the upper end face of the limiting flange is provided with multiple annular sealing rings, each with a hollow structure. These annular sealing rings are coaxial with and equidistant from the sealing pipe. When the adjusting bolt is fully unscrewed from the mounting base, water flow exists within the conversion groove. During pressure fluctuations, the limiting flange is prone to impact with the mounting base. By providing multiple annular sealing rings with a hollow structure on the upper end face of the limiting flange, these rings function to dampen vibrations and ensure a tight seal, thus guaranteeing the operational stability of the equipment.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. This invention introduces a tower-shaped pressure pipe into the reverse osmosis unit, and achieves the installation and disassembly of the pressure pipe through the cooperation of flange and guide groove, thereby realizing the rapid replacement of reverse osmosis membrane and simplifying the membrane replacement process. Furthermore, by setting the guide groove and flange to be inclined, the positioning time during pressure pipe installation is saved, equipment downtime is reduced, and maintenance efficiency is improved.

[0019] 2. By setting up a closed pipe, the connection between the booster unit and the reverse osmosis unit is linked to the installation action of the pressure pipe. This control method eliminates the need to install a valve body between the outlet of the booster unit and the inlet of the reverse osmosis unit. Furthermore, before a seal is formed between the flange and the mounting groove, a salt solution cannot be introduced into the pressure pipe, which improves the reliability of the equipment and simplifies the maintenance procedures of the reverse osmosis unit.

[0020] 3. By setting up a conversion tank, this invention allows the pressure pipe to be disassembled during maintenance of a certain stage of the reverse osmosis unit. The corresponding pressurization unit then allows the salt solution to flow into the next stage of the reverse osmosis unit through the conversion tank. The next stage of the reverse osmosis unit can then continue to perform desalination. This avoids the need for the equipment to run simultaneously during maintenance of a certain stage of the reverse osmosis unit, which could cause downtime or damage to downstream equipment and ensure work efficiency. Attached Figure Description

[0021] Figure 1 This is a forward isometric view of the desalination equipment of the present invention;

[0022] Figure 2 This is a rear axial view of the desalination device of the present invention;

[0023] Figure 3 This is a schematic diagram of the overall structure of a single-stage reverse osmosis unit in the desalination equipment of the present invention;

[0024] Figure 4 for Figure 3 Full sectional view at point AA;

[0025] Figure 5 This is a schematic diagram showing the state when the bottom shell is connected to the connecting hole;

[0026] Figure 6 for Figure 4 Full sectional view at point BB;

[0027] Figure 7 This is an exploded view of a single-stage reverse osmosis unit in the desalination equipment of this invention;

[0028] Figure 8 This is a schematic diagram of the flange structure.

[0029] In the diagram: 1. Reverse osmosis unit; 2. Electro-deionization unit; 3. Pressurization unit; 4. Pressure pipe; 5. Flange; 6. Inclined surface; 7. Mounting base; 8. Mounting groove; 9. Guide groove; 12. Adjusting bolt; 13. Wedge block; 14. Spring No. 1; 15. Groove opening; 16. Pressure-bearing surface; 17. Bottom shell; 18. Connecting hole; 19. Sealing pipe; 20. Connecting section; 21. Cut-off section; 22. Through hole; 23. Spring No. 2; 24. Limiting flange; 25. Transition groove; 26. Transition section; 27. Transition port; 28. Annular protrusion; 29. ​​Annular sealing ring. Detailed Implementation

[0030] Please see Figures 1 to 8 This invention provides an integrated desalination equipment for power plant reverse osmosis EDI, the technical solution of which is as follows:

[0031] Please refer to the following: An integrated reverse osmosis EDI desalination equipment for power plants. Figures 1 to 4 , Figures 6 to 8 The system includes a reverse osmosis unit 1, an electro-deionization unit 2, a water storage tank (not shown in the figure), and a booster unit 3. The reverse osmosis unit 1 is located before the electro-deionization unit 2. The water storage tank is connected to the concentrate outlet of the reverse osmosis unit 1. The booster unit 3 is connected to the inlet of the reverse osmosis unit 1. The reverse osmosis unit 1 has four stages. Specifically, the reverse osmosis unit 1 includes a pressure pipe 4, a flange 5, and a mounting base 7. The pressure pipe 4 has a tower-like structure. The flange 5 is coaxially fixedly installed at the lower end of the pressure pipe 4. The lower end of the pressure pipe 4 is the inlet. The outlet and concentrate outlet of the pressure pipe 4 are respectively located at the pressure pipe 4. On the upper surface and upper sidewall of the mounting base 7, a mounting groove 8 is provided on the top, and a guide groove 9 is provided on the sidewall of the mounting groove 8. Both the mounting groove 8 and the guide groove 9 penetrate through the front and rear ends of the mounting base 7. The flange 5 is slidably installed in the guide groove 9, and the lower end of the flange 5 is in contact with the bottom of the mounting groove 8. The lower end face of the flange 5 is provided with multiple annular protrusions 28. The multiple annular protrusions 28 are coaxial with the inner sidewall of the pressure pipe 4 and are equidistant. The cross-section of the multiple annular protrusions 28 is semi-circular, and all the multiple annular protrusions 28 are slidably connected to the bottom wall of the mounting groove 8. A pressure assembly is provided on the upper surface of the mounting base 7. The force assembly includes an adjusting bolt 12, a wedge block 13, and a first spring 14. The flange 5 has slots 15 on both its left and right sides, completely penetrating both ends of the flange 5. A pressure-bearing surface 16 is provided on the front wall of the slot 15, forming an angle with the lower end face of the flange 5. The lower end of the slot 15 is narrower than the upper end. The wedge block 13 is slidably connected to the pressure-bearing surface 16. The wedge block 13 has mounting holes penetrating both ends. The adjusting bolt 12 is rotatably installed in the mounting holes, with its lower end extending into the mounting base 7. The lower end of the adjusting bolt 12 is connected to the mounting base 7. The mounting base 7 is threaded, the head of the adjusting bolt 12 is located on the upper side of the wedge block 13, the first spring 14 is sleeved on the adjusting bolt 12, and the upper and lower ends of the first spring 14 are slidably connected to the wedge block 13 and the head of the adjusting bolt 12 respectively; the guide groove 9 includes a straight section and an inclined section, the straight section is located behind the inclined section, the inclined section forms an angle with the bottom wall of the mounting groove 8, and the height of the front end of the inclined section is lower than the height of the rear end. The upper end face of the flange 5 is provided with an inclined surface 6, the slope angle of the inclined surface 6 is the same as the slope angle of the inclined section, but the slope length of the inclined section is longer than the slope length of the flange 5.

[0032] Please see Figure 4 , Figure 6 and Figure 7The lower end face of the mounting base 7 is provided with a bottom shell 17. The outlet of the booster unit 3 is connected to the inner side wall of the bottom shell 17. The bottom of the mounting groove 8 is provided with a connecting hole 18 that connects to the inside of the bottom shell 17. A closed tube 19 is coaxially slidably installed in the connecting hole 18. The bottom of the closed tube 19 is closed. The side wall of the closed tube 19 is provided with a connecting section 20 and a stopping section 21. The connecting section 20 is located above the stopping section 21. Multiple through holes 22 penetrating the inner and outer sides are arranged in a ring array on the side wall of the connecting section 20. A second spring 23 is coaxially provided at the lower end of the closed tube 19. The upper and lower ends of the second spring 23 are fixedly connected to the closed tube 19 and the bottom shell 17, respectively. A limiting flange 24 is provided on the lower outer edge of the closed tube 19. The lower end of the adjusting bolt 12 is slidably connected to the upper end face of the limiting flange 24. When the upper end face of the limiting flange 24 is in contact with the lower end face of the mounting base 7, the closed tube 19... The upper end face of 9 is located on the lower side of the bottom wall of the mounting groove 8. The upper end face of the limiting flange 24 is provided with multiple annular sealing rings 29. The multiple annular sealing rings 29 have a hollow structure. The multiple annular sealing rings 29 are coaxial with the closed tube 19 and are equidistantly arranged. The inner bottom wall of the bottom shell 17 is coaxially provided with a conversion groove 25. The lower end face of the closed tube 19 is coaxially provided with a conversion section 26. The outer diameter of the conversion section 26 is the same as the inner diameter of the conversion groove 25. When the limiting flange 24 is attached to the mounting base 7, the minimum distance from the upper end face of the limiting flange 24 to the connecting hole 18 is H1, and the minimum distance from the upper end of the conversion groove 25 to the lower end of the conversion section 26 is H2. H1≥H2. The lower end of the conversion groove 25 is provided with a conversion port 27. The conversion port 27 is connected to the inlet of the next stage reverse osmosis unit 1. The conversion port 27 of the last stage reverse osmosis unit 1 is connected to the inlet of the electro-deionization unit 2.

[0033] Working principle: Please refer to Figures 1 to 8When it is necessary to replace the reverse osmosis membrane in a certain stage of reverse osmosis unit 1, rotate the adjusting bolt 12 outwards towards the mounting base 7. The elastic potential energy of the second spring 23 is released, and it pushes the closed tube 19 upwards until the through hole 22 is completely inserted into the connection hole 18. The salt solution in the bottom shell 17 cannot enter the connection hole 18 through the through hole 22, thereby cutting off the pressure tube 4 between the booster unit 3 and the reverse osmosis unit 1. At this time, the conversion section 26 slides completely out of the conversion tank 25, and the salt solution in the bottom shell 17 enters the next stage of reverse osmosis unit 1 through the conversion port 27 at the lower end of the conversion tank 25. The next stage of reverse osmosis unit 1 can continue to perform desalination. After the adjusting bolt 12 is completely unscrewed from the mounting base 7, the wedge block 13 disengages from the pressure surface 16. Remove the adjusting bolt 12, spring 14, and wedge block 13 from the mounting base 7. Release the limiting constraint of the flange 5. Slide the flange 5 backward from the guide groove 9. The pressure pipe 4 is removed from the mounting base 7 along with the flange 5. Pull out the failed reverse osmosis membrane from the bottom of the pressure pipe 4 to complete the removal of the reverse osmosis membrane inside the pressure pipe 4. Insert a new reverse osmosis membrane from the bottom of the pressure pipe 4 to complete the replacement. Push the flange 5 into the guide groove 9 and push it towards the front end of the guide groove 9. After the inclined surface 6 is in contact with the inclined section, remove the removed... Wedge block 13, spring 14, and adjusting bolt 12 are inserted into mounting base 7 in a bottom-up order. Adjusting bolt 12 is screwed into mounting base 7, compressing spring 14. Spring 14 pushes wedge block 13 downwards, causing the front end face of wedge block 13 to slide relative to the pressure surface 16. Simultaneously, the elastic force of spring 14 is applied to the pressure surface 16. When the pressure surface 16 is under force, flange 5 experiences a downward pressing force and a horizontal force towards the front end. Under the action of the horizontal force, flange 5 moves towards the front end of the inclined section. The lower end face of adjusting bolt 12 provides a downward thrust to limiting flange 24, causing limiting flange 24 to move downwards and press... When the second spring 23 is compressed, the cut-off section 21 is located inside the connection hole 18. The salt solution in the bottom shell 17 cannot enter the connection hole 18, and therefore cannot enter the pressure tube 4. As the adjusting bolt 12 continues to be screwed in, when the length of the adjusting bolt 12 screwed into the mounting base 7 reaches the point where it communicates with the inside of the bottom shell 17 through the through hole 22, the salt solution in the bottom shell 17 enters the connection hole 18 through the connection hole 18. At this time, the desalination work of this stage of reverse osmosis unit 1 begins. At this time, the conversion section 26 is inserted into the conversion tank 25. The conversion tank 25 is isolated from the inside of the bottom shell 17, and the salt solution in this stage of reverse osmosis unit 1 is no longer transported to the next stage of reverse osmosis unit 1.

[0034] The specific embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiments described above. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and ideas of the present invention should still fall within the protection scope of the present invention.

Claims

1. A power plant integrated reverse osmosis and EDI desalination equipment, comprising a reverse osmosis unit, an electro-deionization unit, a water storage tank, and a pressurization unit, wherein the reverse osmosis unit is located upstream of the electro-deionization unit, the water storage tank is connected to the concentrate outlet of the reverse osmosis unit, and the pressurization unit is connected to the inlet of the reverse osmosis unit, and the reverse osmosis unit has at least three stages, characterized in that, The reverse osmosis unit includes a pressure pipe, a flange, and a mounting base. The pressure pipe has a tower-like structure. The flange is coaxially fixedly installed at the lower end of the pressure pipe, which is the inlet. The outlet and concentrate outlet of the pressure pipe are respectively located on the upper end face and upper side wall of the pressure pipe. The top of the mounting base has a mounting groove, and the side wall of the mounting groove has a guide groove. Both the mounting groove and the guide groove extend through the front and rear ends of the mounting base. The flange is slidably installed in the guide groove, and the lower end of the flange is in contact with the bottom of the mounting groove. The upper end face of the mounting base has a pressure assembly, which is slidably connected to the flange and is used to provide downward pressure to the flange. The guide groove includes a straight section and an inclined section. The straight section is located behind the inclined section. The inclined section forms an angle with the bottom wall of the mounting groove. The height of the front end of the inclined section is lower than the height of the rear end. The upper end face of the flange is provided with an inclined surface. The angle of the inclined surface is the same as the angle of the inclined section, but the length of the inclined surface of the inclined section is longer than the length of the inclined surface of the flange. The pressure assembly includes an adjusting bolt, a wedge block, and a No. 1 spring. The flange has slots on both its left and right sides, which completely penetrate the upper and lower ends of the flange. A pressure-bearing surface is located on the front wall of the slot, forming an angle with the lower end face of the flange. The lower end of the slot is narrower than the upper end. The wedge block is slidably connected to the pressure-bearing surface and has mounting holes penetrating both ends. The adjusting bolt is rotatably installed in the mounting holes, with its lower end extending into the mounting base. The lower end of the adjusting bolt is threaded into the mounting base. The head of the adjusting bolt is located on the upper side of the wedge block. The No. 1 spring is sleeved on the adjusting bolt, and its upper and lower ends are slidably connected to the wedge block and the head of the adjusting bolt, respectively.

2. The integrated reverse osmosis EDI desalination equipment for power plants according to claim 1, characterized in that, The lower end face of the mounting base is provided with a bottom shell. The outlet of the booster unit is connected to the inner side wall of the bottom shell. The bottom of the mounting groove is provided with a connecting hole that connects to the inside of the bottom shell. A closed tube is slidably installed coaxially in the connecting hole. The bottom of the closed tube is closed. The side wall of the closed tube is provided with a connecting section and a stopping section. The connecting section is located above the stopping section. Multiple through holes that penetrate both the inner and outer sides are arranged in a ring array on the side wall of the connecting section. A second spring is coaxially provided at the lower end of the closed tube. The upper and lower ends of the second spring are fixedly connected to the closed tube and the bottom shell, respectively. A limiting flange is provided on the outer edge of the lower end of the closed tube. The lower end of the adjusting bolt is slidably connected to the upper end face of the limiting flange. When the upper end face of the limiting flange is in contact with the lower end face of the mounting base, the upper end face of the closed tube is located below the bottom wall of the mounting groove.

3. The integrated desalination equipment for power plant reverse osmosis EDI as described in claim 2, characterized in that, A conversion groove is coaxially arranged on the inner bottom wall of the bottom shell, and a conversion section is coaxially arranged on the lower end face of the closed tube. The outer diameter of the conversion section is the same as the inner diameter of the conversion groove. When the limiting flange is in contact with the mounting base, the minimum distance from the upper end face of the limiting flange to the connection hole is H1, and the minimum distance from the upper end of the conversion groove to the lower end of the conversion section is H2, where H1≥H2. A conversion port is provided at the lower end of the conversion groove, which is connected to the inlet of the next stage reverse osmosis unit. The conversion port of the last stage reverse osmosis unit is connected to the inlet of the electro-deionization unit.

4. The integrated reverse osmosis EDI desalination equipment for power plants according to claim 1, characterized in that, The lower end face of the flange is provided with multiple annular protrusions. These annular protrusions are coaxial with and equidistant from the inner wall of the pressure pipe. The cross-section of each annular protrusion is semi-circular, and all annular protrusions are slidably connected to the bottom wall of the mounting groove.

5. The integrated reverse osmosis EDI desalination equipment for power plants according to claim 2, characterized in that, The upper end face of the limiting flange is provided with multiple annular sealing rings. The annular sealing rings are hollow and are coaxial with the closed tube and are equidistant.

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