Reverse osmosis membrane cleaning and detecting device
By integrating the reverse osmosis membrane cleaning and testing device of tap water tank, pure water tank, acid tank, alkali tank and related equipment, the problems of insufficient cleaning effect evaluation and inconvenient transportation in existing devices are solved, and efficient and compact membrane cleaning and testing functions are achieved, ensuring transportation safety and cleaning effect.
Patent Information
- Application Number
- CN202421510336.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The existing reverse osmosis membrane cleaning devices lack the detection function before and after membrane cleaning, and cannot effectively evaluate the cleaning effect. The equipment is not compact enough during transportation to ensure transportation safety and integrity.
Design a reverse osmosis membrane cleaning and detection device that integrates tap water tank, pure water tank, acid tank, alkali tank, membrane module and related pumps and filters. It adopts container form and integrates pure water preparation, cleaning and detection functions. It uses a high-pressure pump to detect flux and pressure before and after membrane cleaning to realize the dissolution cycle cleaning of the agent.
It realizes efficient membrane cleaning effect detection, reduces the equipment footprint, facilitates transportation, improves transportation safety and cleaning efficiency, and ensures membrane flux and pressure recovery.
Smart Images
Figure CN223209292U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of reverse osmosis membrane cleaning and relates to a reverse osmosis membrane cleaning and detection device. Background Art
[0002] The principle of reverse osmosis technology is to separate substances from water under the influence of a semipermeable membrane, which is higher than the osmotic pressure of the solution. This separation effectively removes dissolved salts, colloids, microorganisms, organic matter, and other substances from water. A major pain point in reverse osmosis membrane operation is fouling. Reverse osmosis membranes can be contaminated by inorganic substances, microorganisms, metal hydroxides, colloids, and other substances in the water. When contaminants accumulate on the membrane surface to a certain level, the pressure differential gradually increases, affecting the performance of the reverse osmosis system. Therefore, regular cleaning of the reverse osmosis membrane is an effective way to ensure the normal operation of the reverse osmosis membrane system.
[0003] Authorization announcement number CN202173885, titled "A Mobile Offline Reverse Osmosis Membrane Cleaning Device," describes a membrane cleaning device and its use method. The main features of this utility model are simultaneous cleaning and soaking, bidirectional cleaning, and a heating function. However, its shortcomings include: 1. The lack of a pre- and post-cleaning membrane inspection function makes the cleaning effect unknown; 2. The lack of a pure water preparation device requires pure water for reagent preparation to prevent the oxidation of the reverse osmosis membrane by residual chlorine in tap water; 3. The lack of a container means the integrity and safety of the cargo cannot be guaranteed during transportation.
[0004] Therefore, a reverse osmosis membrane cleaning and detection device is designed to overcome the above problems. Utility Model Content
[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide a reverse osmosis membrane cleaning and testing device which has a compact and reasonable structure, occupies a small area, has multiple functions, is efficient, safe and practical, and is easy to transport.
[0006] The utility model is realized through the following technical scheme: a reverse osmosis membrane cleaning and detection device, which includes a reverse osmosis membrane cleaning and detection device body mounted on a bottom platform, the body consisting of a tap water tank, a pure water tank, an acid tank, an alkali tank, and a membrane assembly, wherein the tap water tank and the pure water tank are mounted on one side of the bottom platform, the acid tank and the alkali tank are mounted on the other side of the bottom platform between the tap water tank and the pure water tank, a membrane assembly is mounted in the middle, and a first filter, a heater, and a cleaning water pump are further mounted on one side of the acid tank and the alkali tank, and a booster pump, a second filter, and a high-pressure pump are mounted on one side of the tap water tank and the pure water tank.
[0007] Preferably, the tap water tank, the second filter, the high-pressure pump, the membrane assembly, and the pure water tank are connected by pipes to form a pure water system, the tap water is prepared into pure water and poured into the pure water tank, the pure water tank is connected to the inlet of the acid tank and the alkali tank through a booster pump and a three-way valve, and the pure water is poured into the acid tank or the alkali tank by switching the three-way valve. The acid tank and the alkali tank are both provided with a dosing port, and the acid solution or the alkali solution is formed by adding a cleaning drug and mixing it with the pure water.
[0008] Preferably, the outlets of the acid tank and the alkali tank are connected to a first filter and a heater respectively, and water flows into the first filter and the heater in sequence through a cleaning water pump arranged at the outlet, and then flows into the membrane assembly for cleaning. The membrane assembly is also provided with a reflux pipe, which is connected to the inlet of the acid tank and the alkali tank to recycle the waste water after cleaning.
[0009] Preferably, the membrane assembly consists of a membrane frame and a membrane shell arranged on the membrane frame, a cleaning reverse osmosis membrane is installed in the membrane shell, the membrane shells are arranged in multiple rows, the membrane shells in each row are arranged equidistantly, and two adjacent membrane shells are connected by pipes, wherein the pipe of at least one membrane shell is connected to the tap water tank and the pure water tank, and the remaining pipes are connected to the acid tank and the alkali tank.
[0010] Preferably, the bottom platform consists of a pit and an inclined plate, on which a tap water tank, a pure water tank, an acid tank, an alkali tank, and a membrane assembly are installed, so that overflowing water can flow into the pit through the inclined plate, and a pit pump is installed on the pit to discharge the water in the pit into an external collection tank for collection.
[0011] The beneficial effects of the utility model are as follows:
[0012] 1. The utility model is composed of a tap water tank, a pure water tank, a cleaning water tank, a heating device, a filter, a cleaning water pump, a booster pump, a high-pressure pump, a special pressure vessel, a membrane frame, etc. A reverse osmosis membrane is installed in the special pressure vessel, and a high-pressure pump can be used to prepare pure water for membrane cleaning, making the whole process efficient and convenient.
[0013] 2. Before cleaning, the utility model uses a high-pressure pump to detect the flux and pressure of the reverse osmosis membrane to be cleaned. After cleaning, the high-pressure pump is used to detect the flux and pressure of the reverse osmosis membrane again. When the water production rate remains unchanged, the pressure difference is reduced by more than 50%; when the pressure remains unchanged, the membrane flux is increased by more than 30%. The cleaning goal can be achieved, making the overall work efficiency high.
[0014] 3. The utility model utilizes pump reflux circulation to achieve drug dissolution, without the need for a stirrer, thus saving equipment.
[0015] 4. The utility model makes an inclination at the bottom foundation with an angle of 3° to 10°. The entire bottom can be used as a drainage pit, and then the drainage is concentrated into the pit and discharged outside by the pit pump with automatic start and stop.
[0016] 5. All equipment and pipelines in the utility model are integrated in a container, which can reduce the floor space. The overall compactness is reasonable. The equipment can be transported to the site for offline cleaning. There is no need to mail the reverse osmosis membrane, which can avoid bumps and losses of the membrane during transportation. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model. DETAILED DESCRIPTION
[0018] In order to enable those skilled in the art to more clearly understand the purpose, technical solutions and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments.
[0019] In the description of the present invention, it should be understood that the orientations or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inside", "outside", "horizontal", and "vertical" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or original referred to must have a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.
[0020] The present invention will be described in detail below with reference to the accompanying drawings: Figure 1 As shown, a reverse osmosis membrane cleaning and detection device includes a reverse osmosis membrane cleaning and detection device body mounted on a bottom platform, the body consisting of a tap water tank 1, a pure water tank 2, an acid tank 3, an alkaline liquid tank 4, and a membrane assembly, wherein the tap water tank 1 and the pure water tank 2 are installed on one side of the bottom platform, the acid tank 3 and the alkaline liquid tank 4 are installed on the other side of the bottom platform located at the tap water tank 1 and the pure water tank 2, a membrane assembly is installed in the middle, and a first filter 6, a heater 5, and a cleaning water pump 7 are also installed on one side of the acid tank 3 and the alkaline liquid tank 4, and a booster pump 10, a second filter 12, and a high-pressure pump 11 are installed on one side of the tap water tank 1 and the pure water tank 2.
[0021] The tap water tank 1, the second filter 12, the high-pressure pump 11, the membrane assembly, and the pure water tank 2 are connected by pipes to form a pure water system. Tap water is prepared into pure water and poured into the pure water tank 2. The pure water tank 2 is connected to the inlets of the acid tank 3 and the alkali tank 4 through the booster pump 10 and the three-way valve (not shown in the figure). The pure water is poured into the acid tank 3 or the alkali tank 4 by switching the three-way valve. The acid tank 3 and the alkali tank 4 are both provided with a dosing port 16, and acid or alkali is formed by adding cleaning drugs and mixing them with pure water.
[0022] The outlets of the acid liquid tank 3 and the alkali liquid tank 4 are respectively connected to the first filter 6 and the heater 5. The water flows into the first filter 6 and the heater 5 in sequence through the cleaning water pump 7 arranged at the outlet, and then flows into the membrane assembly for cleaning. The membrane assembly is also provided with a reflux pipe 15, which is connected to the inlet of the acid liquid tank 3 and the alkali liquid tank 4 to recycle the waste water after cleaning.
[0023] The membrane assembly consists of a membrane frame 8 and a membrane shell 9 arranged on the membrane frame 8. A cleaning reverse osmosis membrane is installed in the membrane shell 9. The membrane shells 9 are arranged in multiple rows, and the membrane shells 9 in each row are arranged equidistantly. The adjacent membrane shells 9 are connected by pipes, wherein the pipe of at least one membrane shell 9 is connected to the tap water tank 1 and the pure water tank 2, and the remaining pipes are connected to the acid tank 3 and the alkali tank 4.
[0024] The bottom platform consists of a pit 14 and an inclined plate 13. A tap water tank 1, a pure water tank 2, an acid tank 3, an alkali tank 4, and a membrane assembly are installed on the inclined plate 13. Overflowing water can flow into the pit 14 through the inclined plate 13. A pit pump (not shown in the figure) is installed on the pit 14 to discharge the water in the pit 14 into an external collection tank for collection.
[0025] The design features of this utility model are as follows:
[0026] 1. The utility model has the function of preparing pure water.
[0027] 2. The utility model has a membrane cleaning function.
[0028] 3. The utility model has a cleaning effect detection function (detection is performed through a high-pressure pump).
[0029] 4. The utility model adopts the container form as a whole, which makes the functions more integrated and convenient for transportation.
[0030] The working process of this utility model is as follows:
[0031] Cleaning process: Use the booster pump 10 to pump the pure water in the pure water tank 2 into the acid tank 3 or the alkali tank 4, add the reagent to the acid tank 3 or the alkali tank 4, and use the circulation of the cleaning water pump 7 to dissolve the reagent in the acid tank 3 or the alkali tank 4 before starting cleaning. The cleaning liquid in the acid tank 3 or the alkali tank 4 passes through the first filter 6 and the heater 5 in sequence under the action of the cleaning water pump 7 and enters the membrane housing 9. The concentrated water and the produced water are returned to the acid tank 3 or the alkali tank 4 and circulate for 3-10 hours; the cleaning water pump 7 is turned off to soak the reverse osmosis membrane in the membrane housing for 3-10 hours. After the soaking is completed, the cleaning water pump 7 is turned on to continue to circulate the cleaning liquid for 3-10 hours to complete the acid washing or alkali washing process, empty the cleaning liquid in the acid tank 3 or the alkali tank 4, and use the booster pump 10 to pump the tap water in the tap water tank into the acid tank 3 or the alkali tank 4. The acid tank 3 or the alkali tank 4 is washed three to five times until the pH of the outlet water is neutral, and then the next step of cleaning is carried out. According to the actual situation, acid washing first and then alkali washing or alkali washing first and then acid washing is selected, and the rinsing and cleaning steps are completed.
[0032] Inspection before cleaning: Load the reverse osmosis membrane to be cleaned into the membrane housing 9, turn on the booster pump 10, allow the concentrate and product water to flow back into the tap water tank 1, then turn on the high-pressure pump 11. After inspection by the high-pressure pump, adjust the concentrate valve, observe the water inlet pressure and concentrate pressure of the membrane housing 9, and record the pressure and pressure difference, concentrate flow rate, and product water flow rate.
[0033] Inspection after cleaning: Turn on the booster pump 10 to allow both the concentrated water and the produced water to flow back into the tap water tank 1, then turn on the high-pressure pump 11, adjust the concentrated water valve, observe the water inlet pressure and concentrated water pressure of the membrane shell 9, and record the pressure and pressure difference, concentrated water flow rate, and produced water flow rate.
[0034] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, any equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical concepts disclosed in this utility model shall be covered by the claims of this utility model.
Claims
1. A reverse osmosis membrane cleaning and detection device, comprising a reverse osmosis membrane cleaning and detection device body mounted on a bottom platform, characterized in that: The main body consists of a tap water tank, a pure water tank, an acid tank, an alkali liquid tank, and a membrane assembly, wherein the tap water tank and the pure water tank are installed on one side of the bottom platform, the acid tank and the alkali liquid tank are installed on the other side of the bottom platform between the tap water tank and the pure water tank, a membrane assembly is installed in the middle, and a first filter, a heater, and a cleaning water pump are also installed on one side of the acid tank and the alkali liquid tank, and a booster pump, a second filter, and a high-pressure pump are installed on one side of the tap water tank and the pure water tank.
2. The reverse osmosis membrane cleaning and detection device according to claim 1, characterized in that: The tap water tank, the second filter, the high-pressure pump, the membrane assembly, and the pure water tank are connected by pipes to form a pure water system. Tap water is prepared into pure water and poured into the pure water tank. The pure water tank is connected to the inlet of the acid tank and the alkali tank through a booster pump and a three-way valve. The pure water is poured into the acid tank or the alkali tank by switching the three-way valve. The acid tank and the alkali tank are both provided with a dosing port, and the acid solution or the alkali solution is formed by adding cleaning drugs and mixing them with pure water.
3. The reverse osmosis membrane cleaning and detection device according to claim 2, characterized in that: The outlets of the acid liquid tank and the alkali liquid tank are respectively connected to a first filter and a heater. Water flows into the first filter and the heater in sequence through a cleaning water pump arranged at the outlet, and then flows into the membrane assembly for cleaning. The membrane assembly is also provided with a reflux pipe, which is connected to the inlet of the acid liquid tank and the alkali liquid tank to recycle the waste water after cleaning.
4. The reverse osmosis membrane cleaning and detection device according to claim 3, characterized in that: The membrane assembly consists of a membrane frame and a membrane shell arranged on the membrane frame. A cleaning reverse osmosis membrane is installed in the membrane shell. The membrane shells are arranged in multiple rows, and the membrane shells in each row are arranged at equal intervals. The adjacent membrane shells are connected by pipes, wherein the pipe of at least one membrane shell is connected to the tap water tank and the pure water tank, and the remaining pipes are connected to the acid tank and the alkali tank.
5. The reverse osmosis membrane cleaning and detection device according to claim 1, characterized in that: The bottom platform consists of a pit and an inclined plate, on which a tap water tank, a pure water tank, an acid tank, an alkali tank, and a membrane assembly are installed. Overflowing water can flow into the pit through the inclined plate. A pit pump is installed on the pit to discharge the water in the pit into an external collection tank for collection.