Recycling and reusing device for discharged water based on RO (Reverse Osmosis) concentrated water system

Abstract

The invention relates to the technical field of discharged water recycling, and discloses a discharged water recycling device based on an RO concentrated water system, which comprises a buffer tank, the buffer tank is connected with an ultrafiltration device, the ultrafiltration device is connected with a precision filter, the precision filter is connected with an RO device, the RO device is connected with a nanofiltration device, and the RO device is connected with a product water tank. The concentrated water is filtered by the RO device and then is divided into two paths of produced water, one path is recycled water, the recycled water enters a product water tank after the produced water conductivity and the produced water flow are detected, and the other path is re-concentrated water, and the re-concentrated water enters the nanofiltration device after pressure detection. Excess pressure of the concentrated water RO device is utilized to enter the nanofiltration device, nanofiltration is not provided with a booster pump, energy conservation and consumption reduction are achieved, the structure is simple and reasonable, the nanofiltration device is independent of original main system equipment, normal operation of the main equipment is not affected when the equipment breaks down or stops running, the water treatment capacity of a preceding-stage device can be reduced, waste water discharge is reduced, and the energy utilization rate is increased. The consumption of tap water in the water production process is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater recovery, and in particular to a wastewater recovery and reuse device based on an RO concentrated water system. Background Art

[0002] In the production process of pure water, a reverse osmosis device is generally used to remove mechanical impurities, organic matter and more than 99% of ions that are not filtered out by the pre-filter device in the water to obtain purified water. During this operation, water must be pressurized before it can pass through the reverse osmosis membrane in the reverse osmosis device. The pressurized water passes through the reverse osmosis membrane to purify the water, and the purified water is sent to the next process for further purification or use. The concentrated water containing mechanical impurities, organic matter and ions is discharged from the reverse osmosis device along with the water flow on the other side of the membrane. The ratio of purified water to influent water in the reverse osmosis device is about 70%, that is, the pressurized water passes through the reverse osmosis membrane in the first-stage reverse osmosis filter device, and 70% of purified water is obtained, and 30% of concentrated water is discharged into the urban sewage network. At the same time, the flushing water (3% of the total water volume) regularly discharged from the pre-filter of the reverse osmosis is also discharged. Such a treatment method has the problem of large wastewater discharge and low energy utilization. Summary of the invention

[0003] The purpose of the present invention is to provide a wastewater recovery and reuse device based on an RO concentrated water system to solve the problems of large wastewater discharge and low energy utilization rate mentioned in the above background technology.

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0005] The present invention is a device for recycling and reusing discharged water based on an RO concentrated water system, comprising a buffer tank, the buffer tank is connected to an ultrafiltration device, the ultrafiltration device is connected to a precision filter, the precision filter is connected to an RO device, the RO device is connected to a nanofiltration device, and the RO device is simultaneously connected to a product water tank;

[0006] After the concentrated water is filtered by the RO device, it is divided into two water production paths. One path is the recycled water: the recycled water enters the product water tank after testing the conductivity and flow of the produced water;

[0007] The other is re-concentrated water: the re-concentrated water enters the nanofiltration device after pressure detection. After the pressure exceeds the limit, the concentrated water discharge valve opens for discharge. After nanofiltration separation, two more water paths are produced. One path returns to the buffer tank after conductivity and flow meter detection, and the other path is directly discharged as the final concentrated water after adjusting the flow.

[0008] Furthermore, the buffer tank includes a main body, a connecting frame is fixedly connected to the outer wall of the main body, two supporting frames are fixedly connected to the bottom of the connecting frame, the bottom of the two supporting frames are fixedly connected to a base frame, the top of the base frame is located in front of the two supporting frames and is fixedly connected to a UF booster pump, the UF booster pump is connected to the bottom of the main body through a pumping pipe, a water inlet connecting pipe is fixedly connected to the top of the main body, a reflux connection water inlet hole is opened on the top of the main body, side strip holes are opened on the outer walls of the two supporting frames, and a limited support frame is fixedly connected to one side of the two supporting frames close to each other.

[0009] Furthermore, a stratification mechanism is provided inside the buffer tank, and the stratification mechanism includes two sliding plates, both of which are slidably connected to the top of the connecting frame, and the sliding plates slide closely through the connecting frame, and the bottoms of the two sliding plates are fixedly connected with a through sliding bar, and the through sliding bar is slidably connected to the inside of the side bar hole, and a reset spring is fixedly connected between the through sliding bar and the connecting frame, and a lifting rod is fixedly connected to the bottom of the two through sliding bars.

[0010] Furthermore, the tops of the two sliding plates are fixedly connected with a through rod, the two through rods slide through the top of the main body, the bottoms of the two through rods are fixedly connected with a layered conical partition frame, the tops of the layered conical partition frames are fixedly connected with a fitting scraper ring, the fitting scraper ring is in contact with the inner wall of the main body, and a through hole is opened through the bottom of the layered conical partition frame, a conical groove is opened at the edge of the through hole at the bottom of the layered conical partition frame, and two limit frames are fixedly connected to the inner wall of the bottom of the layered conical partition frame.

[0011] Furthermore, a dispersion mechanism is provided on the inner wall at the bottom of the main body, and the dispersion mechanism includes a limited fixing frame, which is fixedly connected to one end of the inner wall of the main body close to the UF booster pump, a sliding rod is fixedly connected to the top of the limiting fixing frame, a curved surface dispersion plate is fixedly connected to the top of the sliding rod, and a strip sliding hole is opened on the outer wall of the sliding rod.

[0012] Furthermore, a floating mechanism is provided on the outer wall of the sliding rod, and the floating mechanism includes a sliding sleeve, which is slidably connected to the outer wall of the sliding rod, and the outer wall of the sliding sleeve is fixedly connected to a flow-blocking plate, and one end of the outer wall of the sliding sleeve located below the flow-blocking plate is fixedly connected to three connecting rods, and one end of the three connecting rods away from the sliding sleeve is fixedly connected to a floating air ring, and a conical block is fixedly connected to a place on the top of the flow-blocking plate corresponding to the through hole at the bottom of the layered conical partition frame.

[0013] Furthermore, two extension rods are fixedly connected to the top of the sliding sleeve, and the tops of the two extension rods are fixedly connected to bilateral connecting frames. Two expansion elastic frames are fixedly connected to the outer walls of the bilateral connecting frames. The two expansion elastic frames are symmetrically distributed with the sliding rod as the center, and the expansion elastic frames are elastic. The ends of the two expansion elastic frames away from the bilateral connecting frames are rotatably connected to limit stop bars, and the two limit stop bars are rotatably connected to the bilateral connecting frames. The ends of the two limit stop bars away from the bilateral connecting frames are respectively abutted against the limit frames.

[0014] Furthermore, a load-bearing pull-down mechanism is arranged inside the strip slide hole, and the load-bearing pull-down mechanism includes a sliding block, which is slidably connected inside the strip slide hole, an inner round rod is fixedly connected to the bottom of the sliding block, and roller pressure frames are fixedly connected to the left and right sides of the sliding block, and rollers are arranged at the bottom of the roller pressure frame.

[0015] Furthermore, the roller on the roller pressing frame abuts against the outer wall of the sliding extension frame, the bottom of the inner round rod is fixedly connected with the sliding extension frame, and the sliding extension frame is slidably connected with the inner wall of the strip sliding hole.

[0016] Furthermore, one end of the bottom of the sliding extension frame that is away from each other is fixedly connected to a weighted water box, and an outer wall of the weighted water box that is close to the end of the sliding extension frame is provided with a water inlet hole.

[0017] The present invention has the following beneficial effects:

[0018] (1) The present invention collects the primary RO concentrate and filter backwash water into a buffer tank for flow regulation, pressurizes the water through an ultrafiltration booster pump, and regulates the flow through an inlet regulating valve, and then passes through an ultrafiltration device to filter large particles and organic matter. Impurities are regularly discharged through an ultrafiltration concentrate discharge valve. After the ultrafiltration product water passes through an online flow meter and online conductivity measurement data, it enters a precision filter to further remove impurities and enters a high-pressure pump for pressurization after the pressure is tested by a pressure gauge. At the same time, the slow-opening valve after the pump is opened to buffer the impact of high-pressure water. After the pressure is tested, the high-pressure water enters the RO device. After filtration by the RO device, two water production paths are separated. One path is recycled water: the recycled water enters the production water after testing the conductivity and flow of the produced water. The other is re-concentrated water, which enters the nanofiltration device after pressure detection. After overpressure, the concentrated water discharge valve opens for discharge. After nanofiltration separation, two other water channels are produced. One channel is returned to the buffer tank after conductivity and flow meter detection to reduce the ion content of raw water, and the other channel is discharged on-site as the final concentrated water after adjusting the flow rate. The residual pressure of the concentrated water RO device is used to enter the nanofiltration device. Nanofiltration does not have a booster pump, which saves energy and reduces consumption. It has a simple and reasonable structure and is independent of the original main system equipment. When this equipment fails or stops operating, it will not affect the normal operation of the main equipment, and can reduce the water treatment volume of the front-stage device, reduce the discharge of wastewater, improve energy utilization, and reduce the consumption of tap water in the water production process.

[0019] (2) When a large amount of concentrated water enters the interior of the main body of the present invention, the concentrated water is collected and buffered through the main body, and the floating air ring floats on the surface of the concentrated water. The water level of the concentrated water inside the main body rises, and cooperates with the floating air ring to push the sliding sleeve to slide upward on the outer wall of the sliding rod, and the sliding sleeve and the extension rod drive the bilateral connecting frame, the two expansion elastic frames and the two limit push bars to rise. During the process of the bilateral connecting frame driving the two limit push bars to rise, the angle between the two limit push bars will gradually become smaller, so that the two expanded limit push bars will pass through the through holes at the bottom of the layered conical partition frame to enter the interior of the layered conical partition frame. When the two limit push bars pass through the through holes at the bottom of the layered conical partition frame, the two limit push bars lose the force to resist the through holes at the bottom of the layered conical partition frame, and the two expansion elastic frames will elastically reset, pushing the two limit push bars to be respectively opposite to each other on both sides of the bilateral connecting frame. Rotate so that the ends of the two limit abutments away from the bilateral connecting frames are respectively abutted against the two limit frames, thereby blocking the through holes at the bottom of the layered conical partitions through the flow-blocking plate and the conical block, greatly reducing the flow of concentrated water passing through the layered conical partitions, and the concentrated water that continuously enters the main body will be collected inside the layered conical partitions, and the concentrated water inside the main body located above the layered conical partitions will be supported by the layered conical partitions, thereby reducing the weight of the concentrated water borne by the bottom of the main body, reducing the deformation of the bottom of the main body caused by the weight of a large amount of concentrated water being completely applied to the bottom of the main body for a long time, thereby increasing the service life of the main body, and at the same time reducing the pressure exerted by the concentrated water on the water pipe connection between the bottom of the main body and the UF booster pump, reducing the probability of rupture or loosening of the connection due to excessive pressure at the water pipe connection between the bottom of the main body and the UF booster pump.

[0020] (3) The present invention uses a UF booster pump to extract concentrated water from the main body below the layered conical partition frame, so that when the concentrated water level in the main body below the layered conical partition frame is lower than the bottom of the weighted water box and the floating air ring, the concentrated water stored in the two weighted water boxes causes the two weighted water boxes to lose the buoyancy of the concentrated water and then exert a downward pulling force on the sliding extension frame through their own gravity, so that the rollers at the bottom of the roller pressure frame squeeze the two expanded limit bars, so that the two limit bars shrink relatively and leave the limit frame. The two roller pressure frames squeeze the two limit bars respectively so that the angle between the two limit bars gradually decreases, and then cooperate with the downward conical surface of the conical groove, so that the limit bars pass through the bottom through hole of the layered conical partition frame and move to the bottom of the layered conical partition frame, thereby facilitating the water in the layered conical partition frame to re-enter a place in the main body below the layered conical partition frame, and facilitating the continuous input of concentrated water to the rear through the UF booster pump, thereby improving the practicality of the device.

[0021] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0023] Figure 1 This is a schematic diagram of the structure of the buffer tank of the present invention;

[0024] Figure 2 It is a partial cross-sectional view of the buffer tank of the present invention;

[0025] Figure 3 It is a schematic diagram of the main structure of the present invention;

[0026] Figure 4 It is a schematic diagram of the hierarchical structure of the present invention;

[0027] Figure 5 It is a schematic diagram of the structure of the dispersion mechanism of the present invention;

[0028] Figure 6 It is a schematic diagram of the structure of the floating mechanism of the present invention;

[0029] Figure 7 It is a schematic diagram of the matching structure of the sliding block and the strip-shaped sliding hole of the present invention;

[0030] Figure 8 This is a schematic diagram of the structure of the load-bearing pull-down mechanism of the present invention;

[0031] Fig. 9 for Figure 4 Enlarged view of point A in the middle;

[0032] Fig.10 for Figure 5 Enlarged view of point B in the middle;

[0033] Fig.11 The present invention is a flow chart of a device for recycling and reusing the discharged water of an RO concentrated water system.

[0034] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0035] In the figure: 1. buffer tank; 100. main body; 101. connecting frame; 102. supporting frame; 103. bottom frame; 104. UF booster pump; 105. water inlet connecting pipe; 106. side bar hole; 107. limiting supporting frame; 108. reflux connecting water inlet hole; 200. layering mechanism; 201. sliding plate; 202. penetrating sliding bar; 203. reset spring; 204. lifting rod; 205. penetrating rod; 206. layered conical spacer; 207. fitting scraper ring; 208. conical groove; 209. limiting frame; 300. dispersion mechanism; 301. limiting fixing frame; 302. sliding rod ; 303, curved surface scattered plate; 304, strip sliding hole; 400, floating mechanism; 401, sliding sleeve; 402, flow blocking plate; 403, connecting rod; 404, floating air ring; 405, conical block; 406, extension rod; 407, bilateral connecting frame; 408, expansion elastic frame; 409, limit stop strip; 500, load-bearing pull-down mechanism; 501, sliding block; 502, roller pressure frame; 503, inner round rod; 504, sliding extension frame; 505, load-bearing water box; 6, ultrafiltration device; 7, precision filter; 8, RO device; 9, nanofiltration device; 10, product water tank. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example 1, please refer to Fig.11 As shown, the present invention is a drainage water recycling device based on an RO concentrated water system, comprising a buffer tank 1, the buffer tank 1 is connected to an ultrafiltration device 6, the ultrafiltration device 6 is connected to a precision filter 7, the precision filter 7 is connected to an RO device 8, the RO device 8 is connected to a nanofiltration device 9, and the RO device 8 is simultaneously connected to a product water tank 10;

[0038] The concentrated water is filtered by the RO device 8 and then divided into two water production paths. One path is the recycled water: the recycled water enters the product water tank 10 after testing the conductivity and flow rate of the produced water;

[0039] The other is re-concentrated water: the re-concentrated water enters the nanofiltration device 9 after pressure detection. After the pressure exceeds the limit, the concentrated water discharge valve is opened for discharge. After nanofiltration separation, two more water paths are produced. One path is returned to the buffer tank 1 after conductivity and flow meter detection, and the other path is directly discharged as the final concentrated water after adjusting the flow.

[0040] When in use, the primary RO concentrated water and filter backwash water are collected in the buffer tank 1 for flow adjustment, pressurized by the ultrafiltration booster pump, and adjusted by the water inlet regulating valve, and then filtered through the ultrafiltration device 6 to filter large particles and organic matter, and impurities are regularly discharged through the ultrafiltration concentrated water discharge valve. After the ultrafiltration product water passes through the online flow meter and online conductivity measurement data, it enters the precision filter 7 to further remove impurities and enters the high-pressure pump for pressurization after the pressure is tested by the pressure gauge. At the same time, the slow opening valve after the pump is opened to buffer the impact of high-pressure water. After the pressure is tested, the high-pressure water enters the RO device 8, and the RO device 8 is filtered and then separated. There are two water production routes, one of which is recycled water: the recycled water enters the product water tank 10 after testing the produced water conductivity and produced water flow; the other is re-concentrated water, which enters the nanofiltration device 9 after pressure testing. After the pressure exceeds the pressure, the concentrated water discharge valve is opened for discharge. After nanofiltration separation, two other water routes are produced. One route is returned to the buffer tank 1 after conductivity and flow meter testing to reduce the raw water ion content, and the other route is discharged on site as the final concentrated water after adjusting the flow, and enters the nanofiltration device 9 using the residual pressure of the concentrated water RO device 8. The nanofiltration does not have a booster pump, which saves energy and reduces consumption. Its structure is simple and reasonable, and it is independent of the original main system equipment.

[0041] Example 2, please refer to Figure 1-Figure 10 As shown, the buffer tank 1 includes a main body 100, a connecting frame 101 is fixedly connected to the outer wall of the main body 100, two supporting frames 102 are fixedly connected to the bottom of the connecting frame 101, a bottom of the two supporting frames 102 is fixedly connected to a base frame 103, a top of the base frame 103 is located before the two supporting frames 102 and is fixedly connected to a UF booster pump 104, the UF booster pump 104 is connected to the bottom of the main body 100 through a pumping pipe, a water inlet connecting pipe 105 is fixedly connected to the top of the main body 100, a reflux connection water inlet hole 108 is opened on the top of the main body 100, side strip holes 106 are opened on the outer walls of the two supporting frames 102, and a limited support frame 107 is fixedly connected to the side of the two supporting frames 102 close to each other;

[0042] A layering mechanism 200 is provided inside the buffer tank 1. The layering mechanism 200 includes two sliding plates 201. The two sliding plates 201 are both slidably connected to the top of the connecting frame 101. The sliding plates 201 slide through the connecting frame 101. The bottoms of the two sliding plates 201 are fixedly connected with a penetrating sliding bar 202. The penetrating sliding bar 202 is slidably connected to the inside of the side bar hole 106. A reset spring 203 is fixedly connected between the penetrating sliding bar 202 and the connecting frame 101. A lifting rod 204 is fixedly connected to the bottoms of the two penetrating sliding bars 202. The tops of the two sliding plates 201 are both fixedly connected with a penetrating rod 205. The two penetrating rods 205 slide through the top of the main body 100. The bottoms of the two penetrating rods 205 are fixedly connected with a layered conical spacer 206. The tops of the layered conical spacers 206 are fixedly connected with a fitting scraper ring 207. The fitting scraper ring 207 is attached to the inner wall of the main body 100. The layered conical partition 206 is close to each other, and a through hole is formed through the bottom of the layered conical partition 206. A conical groove 208 is formed at the edge of the through hole. Two limit frames 209 are fixedly connected to the inner wall of the bottom of the layered conical partition 206. By pushing the lifting rod (204) upward, the through sliding bar (202) slides upward inside the side bar hole (106). The layered conical partition (206) is driven to slide upward inside the main body (100) through the sliding plate (201) and the through rod (205). The scraper ring (207) is fitted with the inner wall of the buffer tank (1) to locally clean the inner wall of the main body (100). During use, the position of the lifting rod (204) is pressed and limited by an external structure to avoid the phenomenon that the layered conical partition (206) is pushed up inside the main body (100) due to the buoyancy of concentrated water during use.

[0043] A dispersion mechanism 300 is provided on the inner wall at the bottom of the main body 100. The dispersion mechanism 300 includes a limited position fixing frame 301. The limited position fixing frame 301 is fixedly connected to one end of the inner wall of the main body 100 near the UF booster pump 104. A sliding rod 302 is fixedly connected to the top of the limited position fixing frame 301. A curved surface dispersion plate 303 is fixedly connected to the top of the sliding rod 302. The sliding rod 302 is connected to the water inlet connecting pipe (105) through an external water inlet pipe to transmit concentrated water to the inside of the main body (100). After the water enters the inside of the main body (100), the curved surface dispersion plate (303) disperses the water to both sides to prevent the water from directly impacting the bottom of the main body (100) or the bottom of the layered conical partition frame (206) after entering the inside of the main body (100). A strip-shaped sliding hole 304 is provided on the outer wall of the sliding rod 302.

[0044] The outer wall of the slide bar 302 is provided with a floating mechanism 400, which includes a sliding sleeve 401, which is slidably connected to the outer wall of the slide bar 302, and the outer wall of the sliding sleeve 401 is fixedly connected to a flow blocking plate 402, and one end of the outer wall of the sliding sleeve 401 located below the flow blocking plate 402 is fixedly connected to three connecting rods 403, and one end of the three connecting rods 403 away from the sliding sleeve 401 is fixedly connected to a floating air ring 404, and the top of the flow blocking plate 402 is fixedly connected to a place corresponding to the bottom through hole of the layered conical partition frame 206 There is a conical block 405, two extension rods 406 are fixedly connected to the top of the sliding sleeve 401, and the tops of the two extension rods 406 are fixedly connected to a bilateral connecting frame 407. The outer wall of the bilateral connecting frame 407 is fixedly connected to two expansion elastic frames 408. The two expansion elastic frames 408 are symmetrically distributed with the sliding rod 302 as the center. The expansion elastic frames 408 are elastic. The ends of the two expansion elastic frames 408 away from the bilateral connecting frames 407 are both rotatably connected to the limited position abutting strips 409. The two limited position abutting strips 409 are both rotatably connected to the bilateral connecting frames 407. The ends of the limit abutment strips 409 away from the bilateral connection frame 407 are respectively abutted against the limit frames 209, and the concentrated water is collected and buffered by the main body 100. The floating air ring 404 floats on the surface of the concentrated water, and the water level of the concentrated water inside the main body 100 rises. Through the buoyancy of the floating air ring 404 and the concentrated water, the floating air ring 404 rises synchronously with the water surface below the layered conical partition frame 206 inside the main body 100, pushing the sliding sleeve 401 to slide upward on the outer wall of the sliding rod 302, and driving the bilateral connection frame 407 through the sliding sleeve 401 and the extension rod 406. The connecting frame 407, the two expansion elastic frames 408 and the two limiting abutting strips 409 rise, and the two limiting abutting strips 409 respectively abut against the inner wall of the circular hole at the bottom of the layered conical partition frame 206. The two-sided connecting frame 407 drives the two limiting abutting strips 409 to rise, so that the two limiting abutting strips 409 rotate relatively on the two-sided connecting frame 407, so that the angle between the two limiting abutting strips 409 gradually decreases, so that the two limiting abutting strips 409 after expansion pass through the through hole at the bottom of the layered conical partition frame 206 and enter the inside of the layered conical partition frame 206;

[0045] The strip-shaped slide hole 304 is provided with a load-bearing pull-down mechanism 500, which includes a sliding block 501, which is slidably connected to the strip-shaped slide hole 304, and an inner round rod 503 is fixedly connected to the bottom of the sliding block 501. The left and right sides of the sliding block 501 are fixedly connected to roller pressing frames 502, and rollers are provided at the bottom of the roller pressing frames 502. The rollers on the roller pressing frames 502 are against the outer wall of the sliding extension frame 504, and the bottom of the inner round rod 503 is fixedly connected to the inner round rod 503. The sliding extension frame 504 is fixedly connected, and the sliding extension frame 504 is slidably connected to the inner wall of the strip sliding hole 304. The ends of the bottom of the sliding extension frame 504 that are far away from each other are fixedly connected to a weighted water box 505. The end of the outer wall of the weighted water box 505 close to the sliding extension frame 504 is provided with a water inlet hole. The concentrated water located below the layered conical partition frame 206 in the main body 100 is extracted by the UF booster pump 104, so that the concentrated water located below the layered conical partition frame 206 in the main body 100 is When the concentrated water level below is lower than the bottom of the weighted water box 505 and the floating air ring 404, the concentrated water stored in the two weighted water boxes 505 causes the two weighted water boxes 505 to lose the buoyancy of the concentrated water and exert a downward pulling force on the sliding extension frame 504 through their own gravity, and the sliding block 501 is pulled downward inside the strip sliding hole 304 through the inner round rod 503, so that the roller at the bottom of the roller pressing frame 502 is against the outer wall of the limit stop strip 409, and the expanded The two limit bars 409 are squeezed so that they shrink relatively and leave the limit frame 209, so that the limit bars 409 contact the conical surface of the conical groove 208. The two roller pressure frames 502 squeeze the two limit bars 409 respectively so that the angle between the two limit bars 409 gradually decreases and cooperates with the downward conical surface of the conical groove 208, so that the limit bars 409 pass through the bottom through hole of the layered conical partition frame 206 and move to the bottom of the layered conical partition frame 206.

[0046] During use, when a large amount of concentrated water enters the main body 100, the main body 100 collects and buffers the concentrated water, and the floating air ring 404 floats on the surface of the concentrated water. The water level of the concentrated water inside the main body 100 rises. Through the buoyancy of the floating air ring 404 and the concentrated water, the floating air ring 404 rises synchronously with the water surface below the layered conical partition frame 206 inside the main body 100, pushing the sliding sleeve 401 to slide upward on the outer wall of the sliding rod 302, and driving the bilateral connecting frame 407, the two expansion elastic frames 408 and the two limit stop bars through the sliding sleeve 401 and the extension rod 406. The two limit bars 409 are respectively against the inner wall of the circular hole at the bottom of the layered conical partition frame 206 by the two limit bars 409. The two-sided connecting frame 407 drives the two limit bars 409 to rise, and the two limit bars 409 are relatively rotated on the two-sided connecting frame 407 during the process of rising, so that the angle between the two limit bars 409 gradually becomes smaller, so that the two limit bars 409 after expansion can pass through the through hole at the bottom of the layered conical partition frame 206 and enter the layered conical partition frame 206. At the same time, the elastic frame 408 is expanded to move away from the end of the extension rod 406 and the limit bar 409 away from the double-sided connecting frame. The connecting frame 407 is connected with a rotation. When the flow blocking plate 402 is close to the bottom of the layered conical spacer 206, the conical block 405 passes through the through hole at the bottom of the layered conical spacer 206 and enters the interior of the layered conical spacer 206. The two limit bars 409 pass through the through hole at the bottom of the layered conical spacer 206. After the two limit bars 409 lose the force against the through hole at the bottom of the layered conical spacer 206, the two expansion elastic frames 408 will elastically reset, pushing the two limit bars 409 to rotate relative to each other on both sides of the bilateral connecting frame 407, so that the clamp between the two limit bars 409 The angle becomes larger, so that the ends of the two limit bars 409 away from the bilateral connecting frame 407 are respectively against the two limit frames 209, so that the through holes at the bottom of the layered conical partition frame 206 are blocked by the flow blocking plate 402 and the conical block 405, which greatly reduces the flow of concentrated water passing through the layered conical partition frame 206, and the concentrated water that continues to enter the inside of the main body 100 will be collected inside the layered conical partition frame 206, and the concentrated water inside the main body 100 located above the layered conical partition frame 206 will be supported by the layered conical partition frame 206, thereby reducing the weight of the concentrated water borne by the bottom of the main body 100;

[0047] The UF booster pump 104 extracts the concentrated water below the layered conical partition 206 in the main body 100, so that the concentrated water level below the layered conical partition 206 in the main body 100 is lower than the bottom of the weighted water box 505 and the floating air ring 404. The concentrated water stored in the two weighted water boxes 505 causes the two weighted water boxes 505 to lose the buoyancy of the concentrated water and exert a downward pulling force on the sliding extension frame 504 through their own gravity. The inner round rod 503 pulls the sliding block 501 to slide downward in the strip sliding hole 304, so that the roller at the bottom of the roller pressing frame 502 is pressed against the outer wall of the limit stop bar 409, The two expanded limit bars 409 are squeezed to make the two limit bars 409 relatively shrink and leave the limit frame 209, so that the limit bars 409 contact the conical surface of the conical groove 208, and the two roller pressing frames 502 squeeze the two limit bars 409 respectively to make the angle between the two limit bars 409 gradually decrease and cooperate with the downward conical surface of the conical groove 208, so that the limit bars 409 pass through the bottom through hole of the layered conical partition frame 206 and move to the bottom of the layered conical partition frame 206, so as to facilitate the water inside the layered conical partition frame 206 to re-enter the inside of the main body 100 located below the layered conical partition frame 206;

[0048] When the angle between the two limit bars 409 gradually becomes smaller, the two expansion elastic frames 408 are squeezed at the same time, so that the two expansion elastic frames 408 are elastically deformed relative to each other, and the bending amplitude of the two expansion elastic frames 408 is increased. When the two limit bars 409 pass through the through holes at the bottom of the layered conical spacer 206 and enter the layered conical spacer 206, the thrust applied to the limit bars 409 by the expansion elastic frame 408 when resetting is increased, so that the two limit bars 409 can quickly approach the two limit frames 209 and abut against the two limit frames 209, thereby reducing the phenomenon that the limit bars 409 do not abut against the limit frames 209 in time, so that the end of the limit bars 409 away from the fitting scraper ring 207 abuts against the conical surface of the conical groove 208, thereby avoiding the limit bars 409 from being pressed against the limit frames 209 when they are under downward pressure. The bottom end of 409 abuts against the conical surface of the conical groove 208, so that the limit abutment bar 409 tends to slide gradually downward on the conical surface of the conical groove 208. When the UF booster pump 104 stops pumping water into the main body 100 and continues to inject water into the main body 100 through the water inlet connecting pipe 105, the pressure exerted by the concentrated water inside the layered conical partition 206 on the flow-blocking plug 402 at the bottom through hole of the layered conical partition 206 corresponds to the force of the buoyancy of the floating air circle 404 pushing the flow-blocking plug 402 upward, resulting in the two limit abutments 409 being balanced on the conical surface of the conical groove 208, thereby preventing the pressure of the concentrated water on the layered conical partition 206 from being transmitted to the bottom of the main body 100 through the abutment of the two limit abutments 409 against the conical surface of the conical groove 208, thereby reducing the influence of the layered conical partition 206 on the pressure separation and support effect of the concentrated water in the main body 100.

[0049] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A device for recycling and reusing discharged water from an RO concentrated water system, comprising a buffer tank (1), characterized in that: The buffer tank (1) is connected to an ultrafiltration device (6), the ultrafiltration device (6) is connected to a precision filter (7), the precision filter (7) is connected to an RO device (8), the RO device (8) is connected to a nanofiltration device (9), and the RO device (8) is simultaneously connected to a product water tank (10); After the concentrated water is filtered by the RO device (8), two water production paths are separated. One path is recycled water. The recycled water enters the product water tank (10) after testing the conductivity and flow rate of the produced water. The other is re-concentrated water: the re-concentrated water enters the nanofiltration device (9) after pressure detection. After the pressure exceeds the limit, the concentrated water discharge valve is opened for discharge. After nanofiltration separation, two other water streams are produced. One stream is returned to the buffer tank (1) after being detected by the conductivity and flow meter, and the other stream is directly discharged as the final concentrated water after the flow is adjusted.

2. The device for recycling and reusing discharged water based on the RO concentrated water system according to claim 1, characterized in that: The buffer tank (1) comprises a main body (100), the outer wall of the main body (100) is fixedly connected to a connecting frame (101), the bottom of the connecting frame (101) is fixedly connected to two supporting frames (102), the bottoms of the two supporting frames (102) are fixedly connected to a base frame (103), the top of the base frame (103) is fixedly connected to a UF booster pump (104) located in front of the two supporting frames (102), the UF booster pump (104) is connected to the bottom of the main body (100) through a water suction pipe, the top of the main body (100) is fixedly connected to a water inlet connecting pipe (105), the top of the main body (100) is provided with a reflux connection water inlet hole (108), the outer walls of the two supporting frames (102) are both provided with side strip holes (106), and the two sides of the two supporting frames (102) that are close to each other are both fixedly connected to a limited support frame (107).

3. The device for recycling and reusing discharged water based on the RO concentrated water system according to claim 2, characterized in that: A stratification mechanism (200) is arranged inside the buffer tank (1), and the stratification mechanism (200) includes two sliding plates (201), the two sliding plates (201) are slidably connected to the top of the connecting frame (101) so that the sliding plates (201) slide through the connecting frame (101), the bottoms of the two sliding plates (201) are fixedly connected with a through sliding bar (202), the through sliding bar (202) is slidably connected to the inside of the side bar hole (106), a reset spring (203) is fixedly connected between the through sliding bar (202) and the connecting frame (101), and the bottoms of the two through sliding bars (202) are fixedly connected with a lifting rod (204).

4. The device for recycling and reusing discharged water based on the RO concentrated water system according to claim 3, characterized in that: The tops of the two sliding plates (201) are fixedly connected with a through rod (205), the two through rods (205) slide through the top of the main body (100), the bottoms of the two through rods (205) are fixedly connected with a layered conical spacer (206), the tops of the layered conical spacers (206) are fixedly connected with a fitting scraper ring (207), the fitting scraper ring (207) is in contact with the inner wall of the main body (100), and the bottom of the layered conical spacers (206) is provided with a through hole, the bottom of the layered conical spacers (206) is provided with a conical groove (208) at the edge of the through hole, and the bottom inner wall of the layered conical spacers (206) is fixedly connected with two limit frames (209).

5. The device for recycling and reusing discharged water based on the RO concentrated water system according to claim 4, characterized in that: The bottom inner wall of the main body (100) is provided with a dispersion mechanism (300), and the dispersion mechanism (300) includes a limited fixing frame (301), and the limited fixing frame (301) is fixedly connected to one end of the inner wall of the main body (100) close to the UF booster pump (104), and the top of the limited fixing frame (301) is fixedly connected to a sliding rod (302), and the top of the sliding rod (302) is fixedly connected to a curved surface dispersion plate (303), and the outer wall of the sliding rod (302) is provided with a strip sliding hole (304).

6. The device for recycling and reusing discharged water based on the RO concentrated water system according to claim 5, characterized in that: The outer wall of the sliding rod (302) is provided with a floating mechanism (400), and the floating mechanism (400) includes a sliding sleeve (401), and the sliding sleeve (401) is slidably connected to the outer wall of the sliding rod (302), and the outer wall of the sliding sleeve (401) is fixedly connected with a flow blocking plate (402), and one end of the outer wall of the sliding sleeve (401) located below the flow blocking plate (402) is fixedly connected with three connecting rods (403), and one end of the three connecting rods (403) away from the sliding sleeve (401) is fixedly connected with a floating air ring (404), and a conical block (405) is fixedly connected at a place corresponding to the top of the flow blocking plate (402) and the bottom through hole of the layered conical partition frame (206).

7. The device for recycling and reusing discharged water based on the RO concentrated water system according to claim 6, characterized in that: The top of the sliding sleeve (401) is fixedly connected to two extension rods (406), and the tops of the two extension rods (406) are fixedly connected to a bilateral connecting frame (407). The outer wall of the bilateral connecting frame (407) is fixedly connected to two expansion elastic frames (408). The two expansion elastic frames (408) are symmetrically distributed around the sliding rod (302). The expansion elastic frames (408) are elastic. One end of the two expansion elastic frames (408) away from the bilateral connecting frame (407) is rotatably connected to a limit stop bar (409). The two limit stop bars (409) are rotatably connected to the bilateral connecting frame (407). One end of the two limit stop bars (409) away from the bilateral connecting frame (407) is respectively abutted against the limit frame (209).

8. The device for recycling and reusing discharged water based on the RO concentrated water system according to claim 7, characterized in that: A load-bearing pull-down mechanism (500) is arranged inside the strip-shaped sliding hole (304), and the load-bearing pull-down mechanism (500) comprises a sliding block (501), and the sliding block (501) is slidably connected inside the strip-shaped sliding hole (304), and an inner round rod (503) is fixedly connected to the bottom of the sliding block (501), and a roller pressing frame (502) is fixedly connected to the left and right sides of the sliding block (501), and a roller is arranged at the bottom of the roller pressing frame (502).

9. The device for recycling and reusing discharged water based on the RO concentrated water system according to claim 8, characterized in that: The roller on the roller pressing frame (502) abuts against the outer wall of the sliding extension frame (504); the bottom of the inner round rod (503) is fixedly connected with the sliding extension frame (504); and the sliding extension frame (504) is slidably connected to the inner wall of the strip sliding hole (304).

10. The device for recycling and reusing discharged water based on the RO concentrated water system according to claim 9, characterized in that: The ends of the bottom of the sliding extension frame (504) that are away from each other are fixedly connected with a weighted water box (505), and the outer wall of the weighted water box (505) is provided with a water inlet hole at one end close to the sliding extension frame (504).

Images