Raw water reverse osmosis treatment device for ammonia water preparation

Abstract

The invention relates to the technical field of ammonia water preparation, in particular to a raw water reverse osmosis treatment device for ammonia water preparation, which comprises a shell, the shell is formed by fixing an upper shell and a lower shell, a water inlet pipe is fixed in the middle of the top of the shell, a high-pressure water inlet component is arranged at the top of the water inlet pipe, and a concentrated water outlet pipe is fixed in the middle of the bottom of the shell. A drain valve is fixedly mounted at the bottom of the concentrated water outlet pipe; and the water pressure stabilizing assembly is arranged at the top of the inner wall of the shell. A multi-level pressure regulation and control mechanism is constructed in the reverse osmosis process, the problem of instantaneous pressure impact when the high-pressure pump is started is solved, physical damage to the membrane is avoided, a dual anti-blocking system of active rotary cleaning and back flushing is constructed, the membrane blocking probability is greatly reduced, meanwhile, the impact force of water flow is fully weakened in the back flushing stage, and the reverse osmosis efficiency is improved. It is ensured that the reverse osmosis membrane bears stable pressure all the time, and the problem of secondary damage to the reverse osmosis membrane caused by too large instantaneous pressure in the backwashing stage is avoided.

Description

Technical Field

[0001] This invention relates to the field of ammonia preparation technology, and in particular to a raw water reverse osmosis treatment device for ammonia preparation. Background Technology

[0002] In the ammonia production process, the quality of the raw water has a crucial impact on the quality of the ammonia solution. Raw water typically contains various impurities, such as suspended solids, colloids, dissolved salts, and microorganisms. If these impurities are not effectively removed, they can cause numerous problems in the subsequent ammonia production process. For example, suspended solids and colloids may clog pipes and equipment, affecting the normal operation of the system; dissolved salts may affect the purity and stability of the ammonia solution; and microorganisms may proliferate under suitable conditions, leading to ammonia deterioration. In existing technologies, traditional raw water pretreatment methods include sedimentation, filtration, and adsorption, but these methods are often insufficient to remove minute impurities and dissolved substances from the raw water. Reverse osmosis technology, as a highly efficient membrane separation technology, has been widely used in the field of raw water purification. However, existing reverse osmosis treatment devices for ammonia production still have some shortcomings in actual operation: reverse osmosis membranes are easily fouled; some micron-sized impurities can enter the pores of the membrane, causing membrane blockage, which shortens the membrane's lifespan. Frequent membrane replacement not only increases costs but also affects the continuity of production.

[0003] To address the issue of membrane clogging, a certain reverse osmosis water treatment device on the market employs backwashing, achieving a certain market share. For example, the invention patent with authorization announcement number CN118439768B discloses a high-recovery-rate reverse osmosis water treatment device, including a metal filter residue recovery box, support rods, and a solid-liquid separator. The solid-liquid separator is fixed to the top of the metal filter residue recovery box via the support rods. An inlet component is fixedly installed on one side of the solid-liquid separator. When the first cleaning component alone cannot meet the cleaning requirements, the water flow thrust on the reverse osmosis filter component due to clogging will increase. When the water flow thrust on the reverse osmosis filter component increases to a certain value, a pressure switch will activate the impurity extraction module. The impurity extraction module can remove some impurities that cannot be scraped off from the surface of the reverse osmosis filter component without temporarily shutting down the reverse osmosis water treatment device for backwashing. This achieves the purpose of quickly cleaning the reverse osmosis filter component and can effectively improve the recovery efficiency of heavy metals.

[0004] Based on the aforementioned patents, the existing technologies have the following shortcomings: Existing technologies employ backwashing or impurity extraction techniques, using pressure differential to backwash the membrane surface or actively extract adhering impurities to achieve online cleaning without shutdown. However, these technologies still have a key weakness: during the reverse osmosis feed water stage and the backwashing cleaning stage, the high-pressure pump generates instantaneous high-pressure shocks upon startup. The reverse osmosis membrane cannot withstand these instantaneous pressure fluctuations and is prone to physical damage (such as membrane rupture or membrane fiber breakage). This damage not only directly reduces membrane separation performance but may also cause unfiltered raw water to directly seep into the product water end, resulting in secondary water pollution and exacerbating the quality risks of ammonia water preparation. Therefore, a reverse osmosis raw water treatment device for ammonia water preparation is proposed to improve the above-mentioned problems. Summary of the Invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that during the reverse osmosis water feeding stage and the backwash cleaning stage, the high-pressure pump will generate instantaneous high-pressure impact when it starts up. The reverse osmosis membrane is unable to withstand the instantaneous pressure fluctuation and is prone to physical damage.

[0006] To address the above problems, this invention provides a reverse osmosis treatment device for raw water in ammonia preparation, comprising: The outer shell is composed of two fixed shells, and a water inlet pipe is fixed at the middle of the top of the outer shell. A high-pressure water inlet assembly is provided at the top of the water inlet pipe. A concentrated water outlet pipe is fixed at the middle of the bottom of the outer shell, and a drain valve is fixedly installed at the bottom of the concentrated water outlet pipe. A water pressure stabilizing component is disposed on the top of the inner wall of the housing; An annular seat, which is fixedly installed on the inner wall of the housing and is located below the water pressure stabilizing component; An annular water guide frame is fixed to the bottom inner wall of the outer shell. A pure water outlet pipe extending out of the outer shell is fixed to one side of the bottom of the annular water guide frame, and a second three-way valve is fixedly installed at the bottom end of the pure water outlet pipe. A backwash assembly is disposed between the side port of the second three-way valve and the high-pressure water inlet assembly; A sleeve is fixed between the bottom of the annular seat and the top of the annular water guide frame, and multiple rows of equally spaced, spirally distributed drainage holes are provided on the sleeve. The cylinder is rotatably disposed between the inner wall of the annular seat and the inner wall of the sleeve via a sealed bearing, and a reverse osmosis membrane is fixedly installed on the inner wall of the cylinder. A cleaning component is disposed between the bottom of the water pressure stabilizing component and the inner wall of the reverse osmosis membrane.

[0007] The present invention is further configured such that the high-pressure water inlet assembly includes a high-pressure pump fixedly installed at the bottom of the outer wall of the housing, and an inlet pipe is fixedly installed at the water inlet end of the high-pressure pump, and a first three-way valve is fixedly installed at the water outlet end of the high-pressure pump, and a connecting pipe is fixedly installed between the top port of the first three-way valve and the top of the water inlet pipe.

[0008] The invention is further configured such that the water pressure stabilizing component includes a mounting ring fixedly installed on the inner wall of the top of the outer shell, and a conical water distributor is fixed on the inner wall of the mounting ring, with the conical surface of the conical water distributor facing the direction of the original water flow. An outer water guide ring is fixedly installed on the top of the inner wall of the outer shell, and a plurality of first connecting rods located at the bottom of the outer water guide ring are fixedly installed on the inner wall of the outer shell. One end of the first connecting rod is fixedly attached to the same support cover. An airbag ring is fixedly installed at the middle of the top of the support cover, and an inner water guide plate fitted on the outer wall of the support cover is fixedly installed on the top of the airbag ring. A sealing ring fitted to the inner wall of the inner water guide plate is fixedly installed on the top of the outer wall of the support cover. The top surface of the inner water guide plate and the top surface of the outer water guide ring are both designed as inclined surfaces, and the outer circumference of the inner water guide plate and the inner circumference of the outer water guide ring are provided with the same spiral guide groove. Telescopic frames are fixedly distributed at equal intervals between the top of the inner water guide plate and the outer water guide ring and the bottom of the mounting ring.

[0009] The invention is further configured such that the telescopic frame includes fixed cylinders that are fixed at equal intervals to the bottom of the mounting ring, and telescopic rods are inserted into the inner walls of the fixed cylinders. Springs are fixedly installed on the top of the telescopic rods and the top inner wall of the fixed cylinders. Reinforcing rods are fixed to the bottom of the telescopic rods and the top of the inner water guide plate and the outer water guide ring.

[0010] The present invention is further configured such that the cleaning component includes a rotating rod fixedly installed at equal intervals on the top of the inner wall of the cylinder and a rotating shaft inserted into the center of the cylinder, and a rotating component for driving the rotating shaft, the rotating rod and the cylinder to rotate is provided inside the support cover. A spiral blade is fixedly installed on the top of the outer wall of the rotating shaft, and a spiral scraper is fixedly installed on the bottom of the spiral blade. The outer walls of the spiral blade and the spiral scraper are both in contact with the inner wall of the reverse osmosis membrane.

[0011] The invention is further configured such that the rotating assembly includes a gear ring rotatably mounted on the inner wall of the support cover via a sealed bearing, and the top of the inner wall of the gear ring has equally spaced tooth grooves. A rotating rod is fixed at an equal distance to the bottom of the gear ring. The bottom of the inner wall of the gear ring is rotatably connected to a bottom cover via a sealed bearing, and the top of the bottom cover is fixed to the top inner wall of the support cover. A rotating hole is provided in the middle of the bottom cover. The top of the rotating shaft is rotatably connected to the rotating hole via a sealed bearing. A drive gear is fixedly installed on the top of the outer wall of the rotating shaft, and a transmission gear meshes between the drive gear and the tooth grooves. The transmission gear is rotatably connected between the support cover and the bottom cover via a pin. An impeller is fixedly installed on the outer wall of the rotating shaft, and the impeller is located below the bottom cover. The position of the impeller corresponds to the discharge end of the spiral guide channel.

[0012] The invention is further configured such that the cylinder body includes a cylinder top seat and a cylinder base seat rotatably disposed on the inner wall of the annular seat and the bottom of the inner wall of the sleeve via a sealed bearing, and reinforcing ribs are fixed at equal intervals and distributed in a ring at the bottom edges of the cylinder top seat and the cylinder base seat. The reverse osmosis membrane is fixed on one side of the reinforcing ribs and between the bottom of the cylinder top seat and the cylinder base seat. The top of the inner wall of the cylinder top seat and the top of the inner wall of the annular seat are designed as inclined planes with the same inclination.

[0013] The invention is further configured such that all drainage holes are designed in the shape of a trumpet, and the diameter of the drainage holes gradually decreases from the reverse osmosis membrane to the outer shell. Multiple second connecting rods are fixed to the inner wall of each drainage hole, and one end of each second connecting rod is fixed to the same dispersion seat. The dispersion seat is located at the center of the drainage hole, and both ends of the dispersion seat are designed in the shape of a cone.

[0014] The present invention is further configured such that the top of the annular water guide frame has multiple rows of equally spaced, annularly distributed flow equalizing holes.

[0015] The invention is further configured such that the backwashing assembly includes a flushing pipe fixedly installed between the side ports of the first three-way valve and the second three-way valve.

[0016] In summary, by adopting the above structure, the present invention has the following advantages compared with the prior art: 1. In this invention, a multi-level pressure regulation mechanism is constructed through a water pressure stabilization component, which fundamentally solves the problem of instantaneous pressure shock during high-pressure pump startup. Specifically, the conical water distributor can first perform preliminary diversion and buffering of high-pressure inlet water, weakening the initial impact force of the water flow. Then, the spiral guide groove between the outer water guide ring and the inner water guide plate can extend the water flow path, so that the water flow pressure is gradually released along the spiral direction, avoiding sudden local pressure rise. At the same time, the combination design of the air bladder ring and the telescopic frame can absorb pressure fluctuations in real time through the elastic deformation of the air bladder and the extension and contraction compensation of the telescopic rod. When the inlet water pressure rises instantaneously, the air bladder ring is compressed and the spring is deformed, converting the pressure peak into elastic potential energy. Conversely, it releases energy to maintain pressure stability. This three-level pressure regulation of "diversion-buffering-compensation" ensures that the reverse osmosis membrane is always in a stable pressure environment, avoiding physical damage such as membrane rupture and membrane fiber breakage, significantly extending the service life of the reverse osmosis membrane, and reducing equipment replacement costs. 2. In this invention, a dual anti-clogging system of "active rotation cleaning and backwashing" is constructed through the synergistic effect of the cleaning component and the backwashing component, which effectively improves the efficiency of membrane surface impurity removal. On the one hand, the impeller in the cleaning component uses the kinetic energy of the water discharged from the spiral guide channel to drive the rotating shaft to rotate, which drives the spiral blades and spiral scraper to rotate along the inner wall of the reverse osmosis membrane. The spiral blades squeeze the raw water to quickly pass through the reverse osmosis membrane and scrape off the impurities attached to the membrane surface in real time, such as colloids and microbial debris. The rotating rod drives the toothed ring and the cylinder to rotate synchronously, so that all areas of the membrane surface can be cleaned evenly, avoiding local impurity accumulation. On the other hand, the backwashing component is connected to the second three-way valve and the first three-way valve through the flushing pipe, which can sequentially reverse the flow of purified water to the reverse osmosis membrane. In conjunction with the rotating reverse osmosis membrane, the residual impurities in the membrane pores are deeply flushed, further restoring the membrane flux. The dual cleaning mechanism greatly reduces the probability of membrane clogging, ensures stable filtration efficiency, and reduces production interruptions caused by membrane clogging. 3. In this invention, during the backwashing process, the inlet pipe of the high-pressure pump is connected to the purified water tank that collects pure water. The pure water is then transported back to the reverse osmosis membrane through the flushing pipe. At this time, the water flow is diverted through the equalization hole of the annular water guide frame, which initially releases the pressure. Then, the water flow enters the large-diameter end of the drain hole from the small-diameter end. The sudden expansion of space reduces the water flow velocity and further releases the pressure. At the same time, when the water flow comes into contact with the conical surface of the dispersion seat, it is evenly dispersed to the inner wall of the drain hole, avoiding direct impact of the water flow on the reverse osmosis membrane. Meanwhile, the conical surface guides the water flow out along a gentle path, further weakening the impact force of the water flow. This ensures that the reverse osmosis membrane always bears a stable pressure during the backwashing process, achieving both deep removal of impurities and avoiding the problem of secondary damage to the reverse osmosis membrane caused by excessive instantaneous pressure during the backwashing stage, thus further extending the service life of the reverse osmosis membrane. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of a reverse osmosis raw water treatment device for ammonia preparation according to the present invention; Figure 2 This is a front sectional view of a reverse osmosis raw water treatment device for ammonia preparation according to the present invention; Figure 3 This is a schematic diagram of the conical water distributor and sleeve structure of a reverse osmosis raw water treatment device for ammonia preparation according to the present invention; Figure 4 This is a schematic diagram of the spiral guide channel and airbag ring structure of a raw water reverse osmosis treatment device for ammonia preparation according to the present invention; Figure 5 This is a schematic diagram of the reinforcing rod and spring structure of a raw water reverse osmosis treatment device for ammonia preparation according to the present invention; Figure 6 This is a schematic diagram of the impeller and drive gear structure of a reverse osmosis raw water treatment device for ammonia preparation according to the present invention; Figure 7 This is a schematic diagram of the cylindrical structure of a raw water reverse osmosis treatment device for ammonia preparation according to the present invention; Figure 8 This is a schematic diagram of the dispersion seat and drainage hole structure of a raw water reverse osmosis treatment device for ammonia preparation according to the present invention; Figure 9 This is a schematic diagram of the backwashing component structure of a raw water reverse osmosis treatment device for ammonia preparation according to the present invention.

[0018] Description of the numbers in the figure: 1. Outer casing; 2. Inlet pipe; 3. Connecting pipe; 4. Backwash assembly; 41. Flushing pipe; 5. Second three-way valve; 6. High-pressure pump; 7. Pure water outlet pipe; 8. Concentrated water outlet pipe; 9. Water pressure stabilizing assembly; 91. Mounting ring; 92. Conical water distributor; 93. Telescopic frame; 931. Fixing cylinder; 932. Telescopic rod; 933. Reinforcing rod; 934. Spring; 94. Outer water guide ring; 95. Inner water guide plate; 96. Spiral guide groove; 97. First connecting rod; 98. Support cover; 99. Airbag ring; 910. Sealing ring; 10. Annular seat; 11. Cylinder body; 111. Top seat of cylinder; 112. Base of cylinder; 113. Reinforcing rib; 12. Reverse osmosis membrane; 13. Sleeve; 14. Drain hole; 15. Annular water guide frame; 16. Dispersion seat; 17. Cleaning component; 171. Rotating rod; 172. Rotating shaft; 173. Spiral blade; 174. Spiral scraper; 175. Bottom cover; 176. Impeller; 177. Gear ring; 178. Transmission gear; 179. Drive gear; 18. Flow equalization hole; 19. Second connecting rod; 20. First three-way valve. Detailed Implementation

[0019] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0020] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "fixed installation," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] Please see Figures 1-9 This invention provides a reverse osmosis treatment device for raw water in ammonia preparation, comprising: The outer casing 1 is composed of two fixed shells, and an inlet pipe 2 is fixed at the middle of the top of the outer casing 1. A high-pressure water inlet assembly is provided on the inlet pipe 2. The high-pressure water inlet assembly includes a high-pressure pump 6 fixedly installed on the outer wall of the outer casing 1. An inlet pipe is fixedly installed at the inlet end of the high-pressure pump 6. A first three-way valve 20 is fixedly installed at the outlet end of the high-pressure pump 6. A connecting pipe 3 is fixedly installed between the top port of the first three-way valve 20 and the top of the inlet pipe 2. A concentrated water outlet pipe 8 is fixedly installed at the middle of the bottom of the outer casing 1. A drain valve is fixedly installed at the bottom of the concentrated water outlet pipe 8. A water pressure stabilizing component 9 is disposed on the top of the inner wall of the outer casing 1. The water pressure stabilizing component 9 includes a mounting ring 91 fixedly installed on the inner wall of the top of the outer casing 1, and a conical water distributor 92 is fixed on the inner wall of the mounting ring 91. The conical surface of the conical water distributor 92 faces the direction of the original water flow. An outer water guide ring 94 is fixed on the top of the inner wall of the outer casing 1, and a plurality of first connecting rods 97 located at the bottom of the outer water guide ring 94 are fixed on the inner wall of the outer casing 1. One end of the first connecting rod 97 is fixed with the same support cover 98. An airbag ring 99 is fixedly installed at the top center of the support cover 98, and an inner water guide plate 95 fitted onto the outer wall of the support cover 98 is fixedly installed on the top of the airbag ring 99. A sealing ring 910 fitted onto the inner wall of the inner water guide plate 95 is fixedly installed on the top of the outer wall of the support cover 98. The top surface of the inner water guide plate 95 and the top surface of the outer water guide ring 94 are both designed as bevels, and the outer circumference of the inner water guide plate 95 and the inner circumference of the outer water guide ring 94 are provided with the same spiral guide groove 96. The inner water guide plate 95 and the outer water guide ring 94 are... Telescopic frames 93 are fixed at equal intervals between the top of the mounting ring 91 and the bottom of the mounting ring 94. Each telescopic frame 93 includes a fixed cylinder 931 fixed at equal intervals to the bottom of the mounting ring 91, and telescopic rods 932 are inserted into the inner wall of each fixed cylinder 931. A spring 934 is fixedly installed on the top of the telescopic rod 932 and the top inner wall of the fixed cylinder 931. A reinforcing rod 933 is fixed on the bottom of the telescopic rod 932 and the top of the inner water guide plate 95 and the outer water guide ring 94. The raw water entering the outer casing 1 first passes through the cone-shaped groove on the inner wall of the mounting ring 91. The water distributor 92 initially diverts the water, and then the water flows along the spiral guide groove 96 between the outer guide ring 94 and the inner guide plate 95 to release pressure. When pressure fluctuations occur, the inner guide plate 95 will compress the air bag ring 99, and the telescopic rod 932 will move along the fixed cylinder 931 and compress the spring 934. The pressure peak is absorbed through elastic deformation, and when the pressure decreases, energy is released to maintain stability, thus realizing three-stage pressure regulation. This ensures that the reverse osmosis membrane 12 is always in a stable pressure environment, avoiding physical damage such as membrane rupture and membrane fiber breakage. The annular seat 10 is fixedly installed on the inner wall of the housing 1, and the annular seat 10 is located below the water pressure stabilizing component 9; An annular water guide frame 15 is fixed to the bottom inner wall of the outer shell 1. The top of the annular water guide frame 15 has multiple rows of equally spaced, annularly distributed flow equalization holes 18. A pure water outlet pipe 7 extending out of the outer shell 1 is fixed to one side of the bottom of the annular water guide frame 15, and a second three-way valve 5 is fixedly installed at the bottom end of the pure water outlet pipe 7. Backwash assembly 4 is located between the side port of the second three-way valve 5 and the high-pressure water inlet assembly. Sleeve 13 is fixed between the bottom of the annular seat 10 and the top of the annular water guide frame 15, and multiple rows of equally spaced spirally distributed drain holes 14 are provided on sleeve 13. The cylinder 11 is rotatably disposed between the inner wall of the annular seat 10 and the inner wall of the sleeve 13 via a sealed bearing, and a reverse osmosis membrane 12 is fixedly installed on the inner wall of the cylinder 11. Cleaning component 17 is disposed between the bottom of water pressure stabilizing component 9 and the inner wall of reverse osmosis membrane 12. Cleaning component 17 includes a rotating rod 171 fixedly installed at equal intervals on the top of the inner wall of cylinder 11 and a rotating shaft 172 inserted into the center of cylinder 11. A rotating assembly for driving the rotating shaft 172, rotating rod 171 and cylinder 11 to rotate is provided inside the support cover 98. A spiral blade 173 is fixedly installed on the top of the outer wall of the rotating shaft 172, and a spiral scraper 174 is fixedly installed on the bottom of the spiral blade 173. The outer walls of the spiral blade 173 and the spiral scraper 174 are both in contact with the inner wall of reverse osmosis membrane 12. The rotating assembly includes a gear ring 177 rotatably disposed on the inner wall of the support cover 98 through a sealed bearing. The top of the wall has evenly spaced toothed grooves. Rotating rods 171 are fixed at equal intervals to the bottom of the gear ring 177. The bottom of the inner wall of the gear ring 177 is rotatably connected to a bottom cover 175 via a sealed bearing. The top of the bottom cover 175 is fixed to the top inner wall of the support cover 98. A rotating hole is formed in the middle of the bottom cover 175. The top of the rotating shaft 172 is rotatably connected to the rotating hole via a sealed bearing. A drive gear 179 is fixedly installed on the top of the outer wall of the rotating shaft 172. A transmission gear 178 meshes between the drive gear 179 and the toothed grooves. The transmission gear 178 is rotatably connected between the support cover 98 and the bottom cover 175 via a pin. An impeller 176 is fixedly installed on the outer wall of the rotating shaft 172, and the impeller 176 is located below the bottom cover 175. The water flow discharged from the spiral guide channel 96, corresponding to the discharge end of the spiral guide channel 96, impacts the impeller 176, causing the rotating shaft 172 to rotate. The drive gear 179 on the rotating shaft 172 drives the gear ring 177 to rotate via the transmission gear 178. The gear ring 177 drives the cylinder 11 to rotate via the rotating rod 171, causing the reverse osmosis membrane 12 and the rotating shaft 172 to rotate synchronously. This allows the spiral blades 173 on the rotating shaft 172 to squeeze water molecules through the reverse osmosis membrane 12 quickly, and the rotating spiral scraper 174 scrapes away impurities from the surface of the reverse osmosis membrane 12. Furthermore, the water pressure stabilizing component 9 not only achieves pressure stabilization but also forms a stable spiral water flow through the spiral guide channel 96 within it, precisely impacting the impeller 176 in the cleaning component 17, thus... The rotating shaft 172 and the cylinder 11 obtain stable rotational power. Compared with the problem of unstable rotation speed of cleaning components caused by pressure fluctuations in traditional devices, this design can stably control the rotational fluctuations of the spiral blades 173 and spiral scrapers 174, ensuring uniform cleaning of all areas of the membrane surface and avoiding local impurity accumulation. At the same time, compared with the passive pressure control method that relies solely on pressure regulating valves in the prior art, this water pressure stabilizing component 9 adopts a purely mechanical structure to achieve active pressure regulation, with a faster response speed (millisecond level) and is not affected by electronic component failures. It has higher reliability in environments with high safety requirements, such as ammonia preparation. Moreover, this structure does not require an additional power source and achieves pressure regulation through the energy of the water flow itself, reducing energy consumption and conforming to the industrial trend of energy conservation and environmental protection.

[0023] In this invention, the cylinder 11 includes a cylinder top seat 111 and a cylinder base 112, which are rotatably disposed on the inner wall of the annular seat 10 and the bottom of the inner wall of the sleeve 13 via a sealed bearing. Reinforcing ribs 113, which are evenly distributed in a ring, are fixed at the bottom edges of the cylinder top seat 111 and the cylinder base 112. The reverse osmosis membrane 12 is fixed on one side of the reinforcing ribs 113 and between the bottom of the cylinder top seat 111 and the cylinder base 112. The top of the inner wall of the cylinder top seat 111 and the top of the inner wall of the annular seat 10 are designed as inclined planes with the same inclination. The reinforcing ribs 113 provide a rigid support frame for the reverse osmosis membrane 12, preventing the reverse osmosis membrane 12 from deforming or shifting due to pressure during high-pressure water intake or backwashing, and ensuring that the membrane surface always maintains a stable filtration shape.

[0024] In this invention, the drain holes 14 are all designed in a funnel shape, and the diameter of the drain holes 14 gradually decreases from the reverse osmosis membrane 12 to the outer shell 1. Multiple second connecting rods 19 are fixed to the inner wall of each drain hole 14, and one end of each second connecting rod 19 is fixed to the same dispersion seat 16. The dispersion seat 16 is located at the center of the drain hole 14, and both ends of the dispersion seat 16 are designed in a conical shape. During backwashing, the pure water is diverted through the equalization hole 18, which initially releases the pressure. Then, the water flows from the small diameter end of the drain hole 14 to the large diameter end. The sudden expansion of the space reduces the water flow velocity and further releases the pressure. At the same time, when the water flows into contact with the conical surface of the dispersion seat 16, it is evenly dispersed to the inner wall of the drain hole 14, avoiding the water flow from directly impacting the reverse osmosis membrane 12. This avoids the problem of excessive instantaneous pressure during the backwashing stage causing secondary damage to the reverse osmosis membrane 12, and further extends the service life of the reverse osmosis membrane 12.

[0025] In this invention, the backwashing assembly 4 includes a flushing pipe 41 fixedly installed between the side ports of the first three-way valve 20 and the second three-way valve 5, so that pure water enters the annular water guide frame 15 through the high-pressure pump 6, the flushing pipe 41 and the pure water outlet pipe 7, and enters the drain hole 14 after being diverted through the equalization hole 18, thereby backwashing the reverse osmosis membrane 12 and ensuring the continuous and stable operation of the reverse osmosis membrane 12.

[0026] In summary, the working principle of this invention is as follows: The high-pressure pump 6 is started, and the raw water is pressurized by the high-pressure pump 6 and then delivered to the first three-way valve 20. The first three-way valve 20 is adjusted so that the raw water enters the outer casing 1 through the connecting pipe 3 and the inlet pipe 2. The raw water entering the outer casing 1 is first initially diverted by the conical water distributor 92 on the inner wall of the mounting ring 91, and then flows along the spiral guide groove 96 between the outer guide ring 94 and the inner guide plate 95 to release pressure. When pressure fluctuations occur, the inner guide plate 95 will compress the air bladder ring 99, and the telescopic rod 932 will move along the fixed cylinder 931 and compress the air bladder ring 99. Spring 934 absorbs pressure peaks through elastic deformation and releases energy to maintain stability when the pressure decreases. The water flow, after being stabilized, is guided along the inclined surface to the annular seat 10. Then the water flows into the cylinder 11. Water molecules pass through the reverse osmosis membrane 12 under pressure and are discharged through the drain hole 14 of the sleeve 13. They are then collected through the equalization hole 18 of the annular water guide frame 15 and finally led to the pure water collection tank of the subsequent ammonia preparation stage through the pure water outlet pipe 7 and the second three-way valve 5. The concentrated water that does not pass through the reverse osmosis membrane 12 is discharged through the concentrated water outlet pipe 8 and the drain valve. Furthermore, the water flow discharged from the spiral guide channel 96 will impact the impeller 176, causing the rotating shaft 172 to rotate. The drive gear 179 on the rotating shaft 172 drives the gear ring 177 to rotate through the transmission gear 178. The gear ring 177 drives the cylinder 11 to rotate through the rotating rod 171. At the same time, the spiral blades 173 on the rotating shaft 172 accelerate the water molecules to pass through the reverse osmosis membrane 12, and work with the rotating spiral scraper 174 to scrape off impurities on the surface of the reverse osmosis membrane 12. When backwashing maintenance is required, connect the inlet pipe of the high-pressure pump 6 to the pure water collection tank, adjust the second three-way valve 5 and the first three-way valve 20, so that pure water enters the annular water guide frame 15 through the flushing pipe 41 and the pure water outlet pipe 7, and after being diverted through the equalization hole 18, it enters from the small diameter end of the drain hole 14, and after being dispersed by the dispersion seat 16, it smoothly flushes the reverse osmosis membrane 12. The wastewater generated during flushing is discharged through the concentrate outlet pipe 8, ensuring that the reverse osmosis membrane 12 continues to work stably. At the same time, the water pressure during flushing is weakened, ensuring that the reverse osmosis membrane 12 always bears a stable pressure during the backwashing process. This achieves deep removal of impurities and avoids the problem of secondary damage to the reverse osmosis membrane 12 caused by excessive instantaneous pressure during the backwashing stage.

[0027] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. A reverse osmosis treatment device for raw water in ammonia preparation, characterized in that, include: The outer shell (1) is composed of two shells, upper and lower, and a water inlet pipe (2) is fixed at the middle of the top of the outer shell (1). A high-pressure water inlet assembly is provided at the top of the water inlet pipe (2). A concentrated water outlet pipe (8) is fixed at the middle of the bottom of the outer shell (1), and a drain valve is fixedly installed at the bottom of the concentrated water outlet pipe (8). Water pressure stabilizing component (9), which is disposed on the top of the inner wall of the outer casing (1); An annular seat (10) is fixedly installed on the inner wall of the housing (1) and the annular seat (10) is located below the water pressure stabilizing component (9); An annular water guide frame (15) is fixed to the bottom inner wall of the outer shell (1). A pure water outlet pipe (7) extending out of the outer shell (1) is fixed on one side of the bottom of the annular water guide frame (15), and a second three-way valve (5) is fixedly installed at the bottom end of the pure water outlet pipe (7). Backwash assembly (4), the backwash assembly (4) is disposed between the side port of the second three-way valve (5) and the high-pressure water inlet assembly; Sleeve (13), the sleeve (13) is fixed between the bottom of the annular seat (10) and the top of the annular water guide frame (15), and multiple rows of drain holes (14) are opened on the sleeve (13) in a spiral arrangement at equal intervals. The cylinder (11) is rotatably disposed between the inner wall of the annular seat (10) and the inner wall of the sleeve (13) via a sealed bearing, and a reverse osmosis membrane (12) is fixedly installed on the inner wall of the cylinder (11). A cleaning component (17) is disposed between the bottom of the water pressure stabilizing component (9) and the inner wall of the reverse osmosis membrane (12).

2. The raw water reverse osmosis treatment device for ammonia water preparation according to claim 1, characterized in that, The high-pressure water inlet assembly includes a high-pressure pump (6) fixedly installed at the bottom of the outer wall of the housing (1), and an inlet pipe is fixedly installed at the water inlet end of the high-pressure pump (6), and a first three-way valve (20) is fixedly installed at the drain end of the high-pressure pump (6). A connecting pipe (3) is fixedly installed between the top port of the first three-way valve (20) and the top of the water inlet pipe (2).

3. The raw water reverse osmosis treatment device for ammonia water preparation according to claim 2, characterized in that, The water pressure stabilizing component (9) includes a mounting ring (91) fixedly installed on the inner wall of the top of the outer shell (1), and a conical water distributor (92) is fixed on the inner wall of the mounting ring (91). The conical surface of the conical water distributor (92) faces the direction of the original water flow. An outer water guide ring (94) is fixed on the top of the inner wall of the outer shell (1), and a plurality of first connecting rods (97) located at the bottom of the outer water guide ring (94) are fixed on the inner wall of the outer shell (1). One end of the first connecting rod (97) is fixed with the same support cover (98). An airbag ring (99) is fixedly installed at the middle of the top of the support cover (98), and the airbag ring... An inner water guide plate (95) is fixedly installed on the top of the support cover (98) and fitted on the outer wall of the support cover (98). A sealing ring (910) is fixedly installed on the top of the outer wall of the support cover (98) and fits against the inner wall of the inner water guide plate (95). The top surface of the inner water guide plate (95) and the top surface of the outer water guide ring (94) are both designed as inclined surfaces. The outer circumference of the inner water guide plate (95) and the inner circumference of the outer water guide ring (94) are provided with the same spiral guide groove (96). The top of the inner water guide plate (95) and the outer water guide ring (94) are fixed with telescopic frames (93) that are evenly distributed between the bottom of the mounting ring (91).

4. The raw water reverse osmosis treatment device for ammonia water preparation according to claim 3, characterized in that, The telescopic frame (93) includes a fixed cylinder (931) fixed at equal intervals at the bottom of the mounting ring (91), and telescopic rods (932) are inserted into the inner wall of the fixed cylinder (931). A spring (934) is fixedly installed on the top of the telescopic rod (932) and the top inner wall of the fixed cylinder (931). A reinforcing rod (933) is fixed to the bottom of the telescopic rod (932) and the top of the inner water guide plate (95) and the outer water guide ring (94).

5. The raw water reverse osmosis treatment device for ammonia water preparation according to claim 4, characterized in that, The cleaning component (17) includes a rotating rod (171) fixedly installed at equal intervals on the top of the inner wall of the cylinder (11) and a rotating shaft (172) inserted at the center of the cylinder (11). The support cover (98) is provided with a rotating component for driving the rotating shaft (172), the rotating rod (171) and the cylinder (11) to rotate. The top of the outer wall of the rotating shaft (172) is fixedly installed with a spiral blade (173), and the bottom of the spiral blade (173) is fixedly installed with a spiral scraper (174). The outer walls of the spiral blade (173) and the spiral scraper (174) are both in contact with the inner wall of the reverse osmosis membrane (12).

6. The raw water reverse osmosis treatment device for ammonia water preparation according to claim 5, characterized in that, The rotating assembly includes a gear ring (177) rotatably mounted on the inner wall of the support cover (98) via a sealed bearing. The top of the inner wall of the gear ring (177) has evenly spaced toothed grooves. A rotating rod (171) is fixed at an even distance to the bottom of the gear ring (177). A bottom cover (175) is rotatably connected to the bottom of the inner wall of the gear ring (177) via a sealed bearing. The top of the bottom cover (175) is fixed to the top inner wall of the support cover (98). A rotating hole is provided in the middle of the bottom cover (175). The top of the rotating shaft (172) is connected via a sealed bearing. The sealing bearing is rotatably connected in the rotating hole. The top of the outer wall of the rotating shaft (172) is fixedly installed with a drive gear (179), and a transmission gear (178) meshes between the drive gear (179) and the tooth groove. The transmission gear (178) is rotatably connected between the support cover (98) and the bottom cover (175) through a pin. An impeller (176) is fixedly installed on the outer wall of the rotating shaft (172), and the impeller (176) is located below the bottom cover (175). The position of the impeller (176) corresponds to the discharge end of the spiral guide groove (96).

7. The raw water reverse osmosis treatment device for ammonia water preparation according to claim 6, characterized in that, The cylinder (11) includes a cylinder top seat (111) and a cylinder base (112) rotatably disposed on the inner wall of the annular seat (10) and the bottom of the inner wall of the sleeve (13) via a sealed bearing. Reinforcing ribs (113) are fixed at equal intervals and distributed in a ring at the bottom edge of the cylinder top seat (111) and the cylinder base (112). The reverse osmosis membrane (12) is fixed on one side of the reinforcing rib (113) and between the bottom of the cylinder top seat (111) and the cylinder base (112). The top of the inner wall of the cylinder top seat (111) and the top of the inner wall of the annular seat (10) are designed as inclined surfaces with the same inclination.

8. The raw water reverse osmosis treatment device for ammonia water preparation according to claim 7, characterized in that, The drain holes (14) are all designed in the shape of a trumpet, and the diameter of the drain holes (14) gradually decreases from the reverse osmosis membrane (12) to the outer shell (1). The inner wall of each drain hole (14) is fixed with multiple second connecting rods (19), and one end of each second connecting rod (19) is fixed with the same dispersion seat (16). The dispersion seat (16) is located at the center of the drain hole (14), and both ends of the dispersion seat (16) are designed in the shape of a cone.

9. The raw water reverse osmosis treatment device for ammonia water preparation according to claim 7, characterized in that, The top of the annular water guide frame (15) has multiple rows of equal-distance, annularly distributed flow equalization holes (18).

10. The raw water reverse osmosis treatment device for ammonia water preparation according to claim 8, characterized in that, The backwash assembly (4) includes a flushing pipe (41) fixedly installed between the side ports of the first three-way valve (20) and the second three-way valve (5).

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