RO (reverse osmosis) sewage treatment equipment and treatment method

Abstract

The invention relates to the technical field of sewage treatment, and discloses RO (reverse osmosis) sewage treatment equipment and a treatment method, and the RO sewage treatment equipment comprises a workbench, a filtering assembly, a conveying assembly, an adjusting roller and a half gear. Through cooperative work of the half gear, the adjusting roller and other parts, when the reverse osmosis membrane body is blocked, the next group of membrane body can be automatically switched to a working position, frequent manual intervention is not needed, the human input is greatly reduced, the cleaning time is shortened, and the sewage treatment continuity and stability are remarkably improved; meanwhile, aiming at the defects that a membrane element is easy to damage and the service life is influenced in the traditional disassembly and cleaning, a'filtration-backflushing 'integrated operation mode is adopted, part of filtered liquid reversely flows into a reverse osmosis membrane body which does not participate in the filtration operation at a low flow speed for flushing, and impurities on the surface of the membrane are effectively removed by utilizing residual pressure of filtrate; and the damage risk caused by physical disassembly is avoided.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of sewage treatment, and particularly relates to a RO reverse osmosis sewage treatment device and a treatment method. BACKGROUND

[0002] RO reverse osmosis, namely reverse osmosis, is a membrane separation technology that realizes efficient separation under pressure driving by using the characteristics of a semi-permeable membrane. Its core principle is based on the characteristics of a semi-permeable membrane that only allows solvent to pass through and intercepts solutes. When a pressure exceeding the osmotic pressure of a solution is applied to the side of the concentrated solution, water molecules will reverse osmosis from the concentrated solution side to the dilute solution side, thereby realizing the separation of solutes and solvents. The RO reverse osmosis technology is widely used in the field of sewage treatment due to its high filtration capacity.

[0003] However, when the reverse osmosis membrane is blocked, it must be stopped and removed from the device separately to perform cleaning operation. This way not only has a complicated operation process, but also requires a large amount of manpower and time cost. In addition, during the disassembly and installation process, the reverse osmosis membrane is easily physically damaged, affecting its service life. Moreover, frequent shutdown, disassembly and cleaning will cause the device to be unable to operate normally for a long time, seriously affecting the continuity and efficiency of sewage treatment, and it is difficult to meet the modern demand for efficient and stable sewage treatment.

[0004] Therefore, the present application is proposed. SUMMARY

[0005] To solve the above technical problems, the basic idea of the technical solution of the present application is as follows: A RO reverse osmosis sewage treatment device, comprising a workbench.

[0006] A filter assembly is rotatably installed on the workbench, the filter assembly comprises three pairs of reverse osmosis membrane bodies connected to each other and in the form of a circular ring, and a sleeve is installed on the filter assembly. A conveying assembly is installed on the workbench, the conveying assembly is used for conveying sewage to two reverse osmosis membrane bodies, and part of the filtered liquid is discharged through a discharge pipe, and the other part of the filtered liquid flows through the other reverse osmosis membrane body in the opposite direction to flush the impurities. The conveying assembly comprises a push plate rotatably installed on the sleeve, three communication ports corresponding to the reverse osmosis membrane bodies are formed in the push plate, two of the communication ports are connected with a sewage conveying system, and the other communication port is used for recovering impurities. An adjusting roller and a half gear wheel are coaxially connected to the workbench, a cam groove for separating the push plate and the sleeve is formed in the adjusting roller, and a large gear wheel installed on the side wall of the sleeve is engaged with the half gear wheel.

[0007] As a preferred embodiment of the present application, four supporting legs are installed at the bottom corners of the workbench, mounting holes for connecting universal wheels are formed at the bottom of the supporting legs, and reinforcing ribs are installed between adjacent supporting legs, the heights of adjacent reinforcing ribs are different.

[0008] As a preferred embodiment of the present application, three pairs of water outlet pipes are installed at the water outlet positions of the reverse osmosis membrane bodies, and discharge pipes are connected to the ends of the three water outlet pipes, flow regulating valves for regulating the flow are installed on the water outlet pipes, a pull plate is installed between the three pairs of reverse osmosis membrane bodies, a positioning column is installed through the pull plate, an installation plate is installed at the end of the positioning column, and the installation plate is attached to the discharge pipe, and the discharge pipe and the installation plate are connected by bolts.

[0009] As a preferred embodiment of the present application, positioning plates are installed at the ends of the three pairs of reverse osmosis membrane bodies, the positioning plates are circular, and guide rings are rotatably installed on the side walls of the positioning plates, vertical plates are installed at the bottom of the guide rings, and the vertical plates are installed on the workbench by bolts.

[0010] As a preferred embodiment of the present application, three water inlets are formed on the sleeve, the three water inlets are connected to the inlets of the corresponding reverse osmosis membrane bodies, limit sliding rails are installed on the side walls of the sleeve, the limit sliding rails are annular, limit seats are slidingly arranged on the side walls of the limit sliding rails, the limit seats are welded on the workbench, fixed plates are welded on the side walls of the reverse osmosis membrane bodies, and the fixed plates and the side walls of the sleeve are connected by bolts.

[0011] As a preferred embodiment of the present application, a piston is installed inside the push plate, the piston is slidingly connected to the inner wall of the sleeve, three communication ports are installed on the push plate and the piston, the communication ports correspond to the reverse osmosis membrane bodies, sealing gaskets are installed on the outer side walls of the communication ports, and the sealing gaskets are attached to the end face of the sleeve.

[0012] As a preferred embodiment of the present application, a cleaning pipe is installed on the top communication port, the cleaning pipe is used to transport cleaning waste liquid, a transmission pipe is installed at the end of the cleaning pipe, the transmission pipe is movably penetrated into the workbench, the end of the transmission pipe is connected to a storage tank installed at the bottom of the workbench, an extension pipe is installed on the bottom communication port, a synchronous pipe is installed at the end of the extension pipe, an inlet pipe is installed at the end of the synchronous pipe, and the inlet pipe is connected to a sewage transportation system.

[0013] As a preferred embodiment of the present application, the push plate is provided with an arched support, a limiting rod is movably arranged in the arched support, a limiting plate is arranged at one end of the limiting rod, the limiting plate is arranged outside the arched support, a back plate is arranged at the other end of the limiting rod, positioning racks are arranged at both ends of the back plate, the positioning racks are welded to the workbench, a limiting spring is sleeved on the limiting rod, one end of the limiting spring is clamped to the back plate, and the other end of the limiting spring is clamped to the arched support.

[0014] As a preferred embodiment of the present application, the adjusting roller and the half gear are provided with a transmission shaft at the rotation center, a bearing is arranged at one end of the transmission shaft, the bearing is arranged on a bearing seat arranged on the surface of the workbench, the other end of the transmission shaft is connected with the output end of the driving motor arranged on the workbench, a slider is arranged in the cam groove, a bending block is arranged on the top of the slider, the bending block is connected with the push plate, and the number of teeth of the large gear is three times the number of teeth of the half gear.

[0015] The treatment method of the RO reverse osmosis sewage treatment equipment has the following steps: Step one: equipment installation and sewage access, the water inlet pipe is connected to the sewage conveying system, the driving motor is started, the adjusting roller and the half gear are driven to rotate through the transmission shaft, the communication port of the push plate is attached to the end face of the sleeve, and the sealing gasket is sealed; Step two: sewage filtration and shunt treatment, the sewage enters the communication port at the bottom of the push plate through the water inlet pipe, the synchronous pipe and the telescopic pipe, is filtered by the two groups of reverse osmosis membrane bodies through the two communication ports of the push plate, most of the filtered liquid is discharged through the water outlet pipe and the discharge pipe, and a small part of the liquid is adjusted in flow through the flow regulating valve and flows reversely into the third group of reverse osmosis membrane bodies to flush impurities; Step three: switching operation after the membrane assembly is blocked, when the reverse osmosis membrane body is blocked, the sewage conveying is stopped, the driving motor keeps running, the sleeve and the filtering assembly are driven to rotate by the half gear through the large gear, the next group of membrane bodies are switched to work, the push plate is driven to move backward by the cam groove of the adjusting roller through the slider and the bending block, the sealing gasket is separated from the sleeve, and friction during rotation is avoided; Step four: equipment cleaning and waste liquid treatment, after the whole membrane assembly completes a round of process, the cleaning waste liquid is injected through the cleaning pipe, and the waste liquid flows into the storage box for temporary storage through the transmission pipe.

[0016] Compared with the prior art, the present application has the following beneficial effects: The application can automatically switch the next group of membrane bodies to the working position when the reverse osmosis membrane body is blocked, without frequent manual intervention, greatly reducing the labor input, shortening the cleaning time, and significantly improving the continuity and stability of sewage treatment; at the same time, aiming at the drawbacks of traditional disassembly and cleaning which easily damage the membrane elements and affect the service life, the "filtration-backflushing" integrated operation mode is adopted, part of the filtered liquid flows back into the reverse osmosis membrane body which does not participate in the filtration operation at a low flow rate for flushing, and the impurities on the membrane surface are effectively removed by using the residual pressure of the filtered liquid, avoiding the damage risk caused by physical disassembly, prolonging the membrane element blockage period; in addition, the application can realize online cleaning of the membrane element, ensure the continuous and efficient operation of the equipment, and complete the backflushing cleaning without additional power, further improving the energy saving and intelligent level of the equipment, meeting the efficient and stable demand of modern sewage treatment.

[0017] The specific embodiments of the application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] In the drawings: Figure 1 It is a three-dimensional view of a RO reverse osmosis sewage treatment equipment; Figure 2 It is a front view of a RO reverse osmosis sewage treatment equipment; Figure 3 It is a top view of a RO reverse osmosis sewage treatment equipment; Figure 4 It is a RO reverse osmosis sewage treatment equipment Figure 3 It is an enlarged view of A in the middle; Figure 5 It is an assembly drawing of a push plate and a sleeve of a RO reverse osmosis sewage treatment equipment; Figure 6 It is a local structure of a RO reverse osmosis sewage treatment equipment Figure 1 ; Figure 7 It is a local structure of a RO reverse osmosis sewage treatment equipment Figure 2 ; In the drawings: 1, workbench; 11, support leg; 111, reinforcing rib; 2, filtration assembly; 21, reverse osmosis membrane body; 211, water outlet pipe; 212, discharge pipe; 213, flow regulating valve; 214, positioning plate; 215, guide ring; 216, vertical plate; 217, pull plate; 218, positioning column; 219, mounting plate; 22, sleeve; 221, limiting slide rail; 222, limiting seat; 223, water inlet; 224, fixing plate; 3. Push plate; 31. Piston; 311. Connecting port; 312. Sealing gasket; 32. Cleaning pipe; 321. Transfer pipe; 322. Storage box; 33. Telescopic pipe; 331. Synchronization pipe; 332. Water inlet pipe; 34. Arched bracket; 341. Limiting rod; 342. Back plate; 343. Positioning frame; 344. Limiting plate; 345. Limiting spring; 4. Drive motor; 41. Transmission shaft; 411. Bearing housing; 42. Adjusting roller; 421. Cam groove; 422. Slider; 423. Bending block; 43. Half gear; 431. Large gear. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0020] Example 1: like Figures 1 to 7 As shown, an RO reverse osmosis wastewater treatment device includes a workbench 1.

[0021] A filter assembly 2 is rotatably mounted on the workbench 1. The filter assembly includes three pairs of reverse osmosis membrane bodies 21 that are connected to each other at the water outlet and are distributed in a circular pattern. A sleeve 22 is installed on the filter assembly 2. A conveying assembly is installed on the workbench 1. The conveying assembly is used to convey wastewater to two of the reverse osmosis membrane bodies 21. Part of the filtered liquid is discharged through the discharge pipe 212, and the other part flows in the opposite direction through the other reverse osmosis membrane body 21. The flusher blocks impurities. The conveying assembly includes a pusher plate 3 that rotates on the sleeve 22. The pusher plate 3 has three connecting ports 311 corresponding to the reverse osmosis membrane body 21. Two of the connecting ports 311 are connected to the sewage conveying system, and the other connecting port 311 is used to recover impurities. The workbench 1 is also equipped with an adjusting roller 42 and a half gear 43 that are coaxially connected. The adjusting roller 42 has a cam groove 421 that drives the pusher plate 3 and the sleeve 22 to separate. The half gear 43 meshes with a large gear 431 installed on the side wall of the sleeve 22.

[0022] The annularly distributed reverse osmosis membrane body 21 design enables the cyclic switching of multiple membrane elements, avoiding overloading of a single membrane element and extending the overall service life; the backwashing function uses the residual pressure of the filtrate to automatically clean the membrane surface, reducing the frequency of manual maintenance and improving equipment operating efficiency.

[0023] like Figures 1 to 7As shown in the specific embodiment, four support legs 11 are installed at the bottom corner of the workbench 1. The bottom of each support leg 11 has mounting holes for connecting casters, and reinforcing ribs 111 are installed between adjacent support legs 11, with varying heights between adjacent reinforcing ribs 111. The caster design enhances the mobility of the equipment and facilitates on-site installation and debugging; the reinforcing ribs 111 of different heights strengthen the structure of the workbench 1, disperse vibrations during equipment operation, and improve stability.

[0024] Example 2: The difference between the above embodiments and this embodiment is that: Figures 1 to 7 As shown, three pairs of reverse osmosis membrane bodies 21 are equipped with outlet pipes 211 at their outlet positions, and each of the three outlet pipes 211 is connected to a discharge pipe 212. A flow regulating valve 213 for adjusting the flow rate is installed on each outlet pipe 211. A pull plate 217 is installed between the three pairs of reverse osmosis membrane bodies 21, and a positioning column 218 is installed through the pull plate 217. An mounting plate 219 is installed at the end of the positioning column 218, and the mounting plate 219 fits snugly against the discharge pipe 212. The discharge pipe 212 and the mounting plate 219 are connected by bolts. The flow regulating valve 213 can precisely control the backwash water flow rate, ensuring the cleaning effect of the membrane elements while avoiding high-pressure impact damage to the membrane structure. The bolted mounting plate 219 facilitates the disassembly and maintenance of the discharge pipe 212, improving maintenance convenience.

[0025] like Figures 1 to 7 As shown in the specific embodiment, positioning plates 214 are installed at the ends of three pairs of reverse osmosis membrane bodies 21. The positioning plates 214 are annular, and guide rings 215 are rotatably installed on the sidewalls of the positioning plates 214. A vertical plate 216 is installed at the bottom of the guide rings 215, and the vertical plate 216 is bolted to the workbench 1. The annular positioning plates 214 and guide rings 215 cooperate to provide stable axial support for the rotation of the filter assembly 2, reduce radial offset during rotation, and ensure the positional accuracy when switching membrane elements.

[0026] like Figures 1 to 7 As shown, the sleeve 22 is further provided with three inlets 223, which are connected to the corresponding inlets of the reverse osmosis membrane body 21. A limiting slide rail 221 is installed on the side wall of the sleeve 22. The limiting slide rail 221 is annular, and a limiting seat 222 is slidably provided on the side wall of the limiting slide rail 221. The limiting seat 222 is welded to the workbench 1. A fixing plate 224 is welded to the side wall of the reverse osmosis membrane body 21, and the fixing plate 224 is bolted to the side wall of the sleeve 22. The annular limiting slide rail 221 restricts the axial movement of the sleeve 22, ensuring precise docking between the inlets 223 and the inlets of the reverse osmosis membrane body 21; the bolted fixing plate 224 facilitates the overall disassembly and replacement of the membrane module, reducing maintenance costs.

[0027] Example 3: Different from the above embodiments, the present embodiment is characterized in that, as shown in Figures 1 to 7 The piston 31 is internally installed in the push plate 3 and is in sliding connection with the inner wall of the sleeve 22. Three communication ports 311 are installed on the push plate 3 and the piston 31, and the communication ports 311 correspond to the reverse osmosis membrane body 21. A sealing gasket 312 is installed on the outer side wall of the communication port 311 and is attached to the end face of the sleeve 22. The structure of the piston 31 cooperates with the sealing gasket 312 to form a dynamic sealing system, which prevents leakage of sewage during transportation and allows the push plate 3 to slide flexibly on the sleeve 22, meeting the switching requirement of the filter assembly 2.

[0028] As shown in Figures 1 to 7 In a specific embodiment, a cleaning pipe 32 is installed on the communication port 311 at the top, and the cleaning pipe 32 is used to transport cleaning waste liquid. A transmission pipe 321 is installed at the end of the cleaning pipe 32, and the transmission pipe 321 is movably penetrated into the workbench 1. The end of the transmission pipe 321 is connected to a storage tank 322 installed at the bottom of the workbench 1. An extension pipe 33 is installed on the communication port 311 at the bottom, and a synchronous pipe 331 is installed at the end of the extension pipe 33. An inlet pipe 332 is installed at the end of the synchronous pipe 331, and the inlet pipe 332 is connected to the sewage transportation system. The extension pipe 33 is designed to adapt to the change in pipe length when the push plate 3 moves, avoiding damage to the pipe caused by rigid connection. The waste liquid storage tank 322 realizes centralized collection of cleaning waste liquid, facilitating subsequent environmental protection treatment and meeting the requirement of industrial clean production.

[0029] As shown in Figures 1 to 7 Further, an arcuate support 34 is installed on the push plate 3. A limiting rod 341 is movably penetrated and installed inside the arcuate support 34. A limiting plate 344 is installed at one end of the limiting rod 341, and the limiting plate 344 is placed outside the arcuate support 34. A back plate 342 is installed at the other end of the limiting rod 341. Positioning frames 343 are installed at both ends of the back plate 342. The positioning frames 343 are welded to the workbench 1. A limiting spring 345 is sleeved and arranged on the limiting rod 341. One end of the limiting spring 345 is clamped to the back plate 342, and the other end is clamped to the arcuate support 34. The limiting spring 345 and the limiting rod 341 constitute an elastic buffering mechanism, which absorbs impact load during movement of the push plate 3, avoids rigid collision damage to components, and ensures the position accuracy when the push plate 3 is reset.

[0030] As shown in Figures 1 to 7As shown, furthermore, a drive shaft 41 is installed on the rotation center of the adjusting roller 42 and the half gear 43. One end of the drive shaft 41 is fitted with a bearing, which is mounted on a bearing seat 411 on the surface of the worktable 1. The other end of the drive shaft 41 is connected to the output end of the drive motor 4 mounted on the worktable 1. A slider 422 is meshed on the cam groove 421, and a bending block 423 is installed on the top of the slider 422. The bending block 423 is connected to the push plate 3. The number of teeth of the large gear 431 is three times the number of teeth of the half gear 43. The gear tooth ratio design allows the filter assembly 2 to switch angles accurately to 120° each time, ensuring the uniformity of membrane element rotation. The linkage mechanism between the cam groove 421 and the slider 422 realizes the synchronous control of the movement of the push plate 3 and the rotation of the filter assembly 2, improving the degree of automation.

[0031] This invention also discloses a treatment method for RO reverse osmosis wastewater treatment equipment, the steps of which are as follows: Step 1: Equipment installation and sewage connection. Connect the inlet pipe 332 to the sewage conveying system. Start the drive motor 4. Drive the adjusting roller 42 and half gear 43 to rotate through the transmission shaft 41, so that the connecting port 311 of the push plate 3 fits with the end face of the sleeve 22, and the sealing gasket 312 forms a seal. Step 2: Wastewater filtration and diversion treatment. Wastewater enters the connecting port 311 at the bottom of the push plate 3 through the inlet pipe 332, the synchronization pipe 331 and the telescopic pipe 33. It is then transported to the two sets of reverse osmosis membrane bodies 21 for filtration through the two connecting ports 311 on the push plate 3. Most of the filtered liquid is discharged through the outlet pipe 211 and the discharge pipe 212. A small portion is controlled by the flow regulating valve 213 and flows back into the third set of reverse osmosis membrane bodies 21 to flush out impurities. Step 3: Switching operation after membrane module blockage. When the reverse osmosis membrane body 21 is blocked, the sewage delivery is stopped, the drive motor 4 continues to run, and the half gear 43 drives the sleeve 22 and filter assembly 2 to rotate through the large gear 431, switching to the next set of membrane bodies to work. The cam groove 421 of the adjusting roller 42 drives the push plate 3 to move backward through the slider 422 and the bending block 423, so that the sealing gasket 312 is separated from the sleeve 22 to avoid friction during rotation. Step 4: Equipment cleaning and waste liquid treatment. After the entire membrane module completes one cycle, cleaning waste liquid is injected through cleaning pipe 32. The waste liquid flows into storage tank 322 for temporary storage through transfer pipe 321.

[0032] The implementation principle of the RO reverse osmosis wastewater treatment equipment of the present invention is as follows: The operator first connects the inlet pipe 332 to the sewage conveying system, and then the operator conveys sewage into the inlet pipe 332 through the sewage conveying system.

[0033] The sewage enters the synchronization pipe 331 through the water inlet pipe 332, and then reaches the communication port 311 at the bottom through the telescopic pipe 33. At this time, the two communication ports 311 on the push plate 3 corresponding to the communication port are respectively communicated with the inlets of the two reverse osmosis membrane bodies 21, and the sewage enters the two reverse osmosis membrane bodies 21 under the action of pressure for filtration. Through the precise correspondence between the push plate and the communication port, the sewage is directionally distributed, ensuring that only two groups of reverse osmosis membrane bodies are driven to filter synchronously each time, avoiding the sharp increase in water flow resistance caused by the simultaneous operation of multiple groups of membrane elements, and improving the sewage purification efficiency of the unit area membrane element.

[0034] Most of the filtered liquid is discharged through the water outlet pipe 211 and the discharge pipe 212 of the reverse osmosis membrane body 21, and only a small part of the liquid flows back into the other reverse osmosis membrane body 21 through the regulation of the flow regulating valve 213. The flow regulating valve can accurately control the flow of the reverse flushing water flow, so that most of the filtered liquid is directly discharged or enters the next processing link, and a small part of the liquid is used for directional backwashing at a low flow rate. Not only does it use the residual pressure of the filtered liquid to complete the impurity flushing of the membrane surface, but also avoids damage to the membrane element caused by excessive backwashing flow. At the same time, the laminar flushing mode is used to strip the fine impurities on the membrane surface, reducing the risk of membrane wire abrasion, synchronously realizing membrane element cleaning during the filtration process, and prolonging the clogging period of the membrane element.

[0035] After the reverse osmosis membrane body in the current state is clogged, the operator stops delivering sewage, but the drive motor 4 is in a working state at this time. The drive motor 4 drives the adjusting roller 42 and the half gear 43 to continuously rotate through the transmission shaft 41. Since the half gear 43 has only half a circle of teeth, when the toothless part of the half gear 43 is in contact with the large gear 431 on the side wall of the sleeve 22, the two are disengaged, and the sleeve 22 and the filtering assembly 2 are temporarily stopped rotating; when the teeth of the half gear 43 are engaged with the large gear 431, the large gear 431 is driven by the half gear 43 to slowly rotate the sleeve 22 and the filtering assembly 2, switching the next group of reverse osmosis membrane bodies to the working position.

[0036] At the same time, the helical cam groove 421 on the outer circumferential surface of the adjusting roller 42 continuously rotates and keeps engagement with the sliding block 422. When the trajectory of the cam groove 421 guides the sliding block 422 to move away from the sleeve 22, the sliding block 422 drives the push plate 3 to move backward through the bent block 423, so that the push plate 3 is separated from the sleeve 22 by a certain distance, and the sealing gasket 312 is separated from the contact with the sleeve 22, thereby avoiding friction between the sealing gasket 312 and the end face of the sleeve 22 during the rotation of the filtering assembly 2, and protecting the sealing performance of the sealing gasket. When the filtering assembly 2 is rotated to the new reverse osmosis membrane body alignment working position, the trajectory of the cam groove 421 changes, driving the sliding block 422 to move the push plate 3 forward, so that the communication ports 311 on the push plate 3 are re-precisely connected with the inlets of the new reverse osmosis membrane body, and the sewage delivery is restored. The new reverse osmosis membrane body is immediately put into filtration work.

[0037] During the rotation switching process of the filter assembly 2, the arched support 34, the limiting rod 341 and the limiting spring 345 on the push plate 3 work in coordination, the limiting spring 345 provides buffering and resetting functions, and the push plate 3 is kept stable during movement; and the positioning plate 214, the guide ring 215 and the vertical plate 216 provide stable guidance and support for the rotation of the filter assembly 2, and ensure that the positions of the reverse osmosis membrane bodies are accurate and do not deviate during rotation switching.

[0038] When the whole set of reverse osmosis membrane bodies completes a round of filtration-backwashing-switching process, the cleaning waste liquid can be connected through the cleaning pipe 32 to clean the inside of the equipment in depth, the waste liquid enters the storage tank 322 through the transmission pipe 321 for temporary storage, so as to be treated centrally subsequently, and ensure that the equipment always operates efficiently and stably.

Claims

1. An RO reverse osmosis wastewater treatment device, comprising a workbench (1), characterized in that: A filter assembly (2) is rotatably mounted on the workbench (1). The filter assembly includes three pairs of reverse osmosis membrane bodies (21) that are connected to each other and distributed in a circular pattern. A sleeve (22) is installed on the filter assembly (2). The workbench (1) is equipped with a conveying assembly for conveying wastewater to two of the reverse osmosis membrane bodies (21). Part of the filtered liquid is discharged through the discharge pipe (212), and the other part flows in the opposite direction from the other reverse osmosis membrane body (21). The flusher blocks impurities. The conveying assembly includes a pusher plate (3) that rotates on the sleeve (22). The pusher plate (3) has three connecting ports (311) corresponding to the reverse osmosis membrane body (21). Two of the connecting ports (311) are connected to the sewage conveying system, and the other connecting port (311) is used to recover impurities. The workbench (1) is also equipped with an adjusting roller (42) and a half gear (43) connected coaxially. The adjusting roller (42) has a cam groove (421) that separates the drive push plate (3) and the sleeve (22). The half gear (43) meshes with the large gear (431) installed on the side wall of the sleeve (22).

2. The RO reverse osmosis wastewater treatment equipment according to claim 1, characterized in that, The workbench (1) has four support legs (11) installed at the bottom corner. The bottom of the four support legs (11) has mounting holes for connecting casters, and there are reinforcing ribs (111) installed between adjacent support legs (11). The heights of adjacent reinforcing ribs (111) are different.

3. The RO reverse osmosis wastewater treatment equipment according to claim 1, characterized in that, Three pairs of reverse osmosis membrane bodies (21) are equipped with water outlet pipes (211) at their water outlet positions, and each of the three water outlet pipes (211) is connected to a discharge pipe (212). A flow regulating valve (213) for adjusting the flow rate is installed on the water outlet pipe (211). A pull plate (217) is installed between the three pairs of reverse osmosis membrane bodies (21). A positioning column (218) is installed through the pull plate (217). An installation plate (219) is installed at the end of the positioning column (218). The installation plate (219) is attached to the discharge pipe (212), and the discharge pipe (212) and the installation plate (219) are connected by bolts.

4. The RO reverse osmosis wastewater treatment equipment according to claim 1, characterized in that, Positioning plates (214) are installed at the ends of the three pairs of reverse osmosis membrane bodies (21). The positioning plates (214) are circular, and guide rings (215) are rotatably installed on the side walls of the positioning plates (214). A vertical plate (216) is installed at the bottom of the guide rings (215). The vertical plate (216) is installed on the workbench (1) by bolts.

5. The RO reverse osmosis wastewater treatment equipment according to claim 1, characterized in that, The sleeve (22) has three water inlets (223), which are connected to the inlets of the corresponding reverse osmosis membrane body (21). The side wall of the sleeve (22) is equipped with a limiting slide rail (221), which is annular. The side wall of the limiting slide rail (221) is slidably provided with a limiting seat (222), which is welded to the workbench (1). The side wall of the reverse osmosis membrane body (21) is welded with a fixing plate (224), which is connected to the side wall of the sleeve (22) by bolts.

6. The RO reverse osmosis wastewater treatment equipment according to claim 1, characterized in that, A piston (31) is installed inside the push plate (3). The piston (31) is slidably connected to the inner wall of the sleeve (22). Three connecting ports (311) are installed on the push plate (3) and the piston (31). The connecting ports (311) correspond to the reverse osmosis membrane body (21). A sealing gasket (312) is installed on the outer wall of the connecting port (311). The sealing gasket (312) is attached to the end face of the sleeve (22).

7. The RO reverse osmosis wastewater treatment equipment according to claim 6, characterized in that, A cleaning pipe (32) is installed on the top connecting port (311). The cleaning pipe (32) is used to transport cleaning waste liquid. A transmission pipe (321) is installed at the end of the cleaning pipe (32). The transmission pipe (321) is movably connected to the workbench (1). The end of the transmission pipe (321) is connected to a storage box (322) installed at the bottom of the workbench (1). A telescopic pipe (33) is installed on the bottom connecting port (311). A synchronization pipe (331) is installed at the end of the telescopic pipe (33). A water inlet pipe (332) is installed at the end of the synchronization pipe (331). The water inlet pipe (332) is connected to the sewage conveying system.

8. The RO reverse osmosis wastewater treatment equipment according to claim 1, characterized in that, An arched bracket (34) is installed on the push plate (3). A limiting rod (341) is installed inside the arched bracket (34). A limiting plate (344) is installed at one end of the limiting rod (341). The limiting plate (344) is placed outside the arched bracket (34). A back plate (342) is installed at the other end of the limiting rod (341). Positioning frames (343) are installed at both ends of the back plate (342). The positioning frames (343) are welded to the workbench (1). A limiting spring (345) is sleeved on the limiting rod (341). One end of the limiting spring (345) is clamped on the back plate (342), and the other end is clamped on the arched bracket (34).

9. The RO reverse osmosis wastewater treatment equipment according to claim 1, characterized in that, A drive shaft (41) is installed on the rotation center of the adjusting roller (42) and the half gear (43). One end of the drive shaft (41) is fitted with a bearing, and the bearing is installed on the bearing seat (411) on the surface of the worktable (1). The other end of the drive shaft (41) is connected to the output end of the drive motor (4) installed on the worktable (1). A slider (422) is engaged on the cam groove (421), and a bending block (423) is installed on the top of the slider (422). The bending block (423) is connected to the push plate (3). The number of teeth of the large gear (431) is three times the number of teeth of the half gear (43).

10. A method for treating wastewater via reverse osmosis (RO), characterized in that, The RO reverse osmosis wastewater treatment equipment described in any one of claims 1 to (9) comprises the following steps: Step 1: Equipment installation and sewage connection. Connect the inlet pipe (332) to the sewage conveying system. Start the drive motor (4). Drive the adjusting roller (42) and half gear (43) to rotate through the transmission shaft (41). Make the connecting port (311) of the push plate (3) fit with the end face of the sleeve (22). The sealing gasket (312) forms a seal. Step 2: Wastewater filtration and diversion treatment. Wastewater enters the connecting port (311) at the bottom of the push plate (3) through the inlet pipe (332), the synchronization pipe (331) and the telescopic pipe (33). It is then transported to the two sets of reverse osmosis membrane bodies (21) for filtration through the two connecting ports (311) on the push plate (3). Most of the filtered liquid is discharged through the outlet pipe (211) and the discharge pipe (212). A small part is controlled by the flow regulating valve (213) and flows back into the third set of reverse osmosis membrane bodies (21) to flush out impurities. Step 3: Switching operation after membrane module blockage. When the reverse osmosis membrane body (21) is blocked, the sewage delivery is stopped, the drive motor (4) continues to run, the half gear (43) drives the sleeve (22) and filter assembly (2) to rotate through the large gear (431), and switches to the next set of membrane bodies to work. The cam groove (421) of the adjusting roller (42) drives the push plate (3) to move backward through the slider (422) and the bending block (423), so that the sealing gasket (312) is separated from the sleeve (22) to avoid friction during rotation. Step 4: Equipment cleaning and waste liquid treatment. After the entire membrane module completes one cycle, cleaning waste liquid is injected through the cleaning pipe (32). The waste liquid flows into the storage tank (322) through the transmission pipe (321) for temporary storage.

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