CN-224221106-U - Offline chemical cleaning device for reverse osmosis membrane

CN224221106UCN 224221106 UCN224221106 UCN 224221106UCN-224221106-U

Abstract

The utility model discloses an offline chemical cleaning device for a reverse osmosis membrane, which comprises a cleaning water tank, a reverse osmosis membrane element membrane shell, a water inlet pipeline, a water production pipeline, a concentrated water pipeline, a pressure gauge assembly, a rotameter and the like. The device comprises a reverse osmosis membrane element membrane shell, at most three water inlet pipelines, at most three water producing pipelines, at most three concentrated water pipelines, at most one second rotor flowmeter and at most one pressure meter component, wherein the at most three reverse osmosis membrane element membrane shells are arranged in parallel, one reverse osmosis membrane element can be placed in each reverse osmosis membrane element membrane shell, the at most three water inlet pipelines are arranged in parallel, each water inlet pipeline is connected with the pressure meter component, the at most three water producing pipelines are arranged in parallel, each water producing pipeline is provided with one first rotor flowmeter and is connected with the pressure meter component, and the at most three concentrated water pipelines are arranged in parallel, and each concentrated water pipeline is provided with one second rotor flowmeter and is connected with the pressure meter component. The offline chemical cleaning device for the reverse osmosis membrane can ensure that each reverse osmosis membrane element achieves a good cleaning effect and accurately monitors the cleaning effect.

Inventors

SUN SHUAI
DENG LITING
Ye Ganggui
GUO YUPENG
LEI HAIDONG
SUN DONGXIAO
KONG HAIXIA
DONG ZHIQIANG
WEI JINHAI
ZHANG PENGHUI

Assignees

中铁上海工程局集团有限公司
伊金霍洛旗澎源供水有限责任公司
中国市政工程华北设计研究总院有限公司
中铁上海工程局集团市政环保工程有限公司

Dates

Publication Date: 20260512
Application Date: 20250506

Claims (10)

1. The offline chemical cleaning device for the reverse osmosis membrane is characterized by comprising a cleaning water tank (16), a reverse osmosis membrane element membrane shell (4), a water inlet pipeline (7), a water production pipeline (3), a concentrated water pipeline (8), a pressure gauge assembly (2) and a rotameter; At most three reverse osmosis membrane element membrane shells (4) are arranged in parallel, and one reverse osmosis membrane element can be placed in each reverse osmosis membrane element membrane shell (4); The water inlet pipes (7) are arranged in parallel, the tail end of each water inlet pipe (7) is respectively connected with the water inlet of each reverse osmosis membrane element membrane shell (4), and the starting end is connected with the cleaning water tank (16), and each water inlet pipe (7) is also connected with the pressure gauge assembly (2) through the first pressure pipeline (51); the device comprises a reverse osmosis membrane element membrane shell (4), a cleaning water tank (16), a water production pipeline (3), a first rotor flowmeter (91), a second pressure pipeline (52) and a pressure meter assembly (2), wherein the water production pipeline (3) is arranged in parallel, the initial end of each water production pipeline (3) is connected with the water production outlet of each reverse osmosis membrane element membrane shell (4) respectively, and the tail end of each water production pipeline is connected with the cleaning water tank (16); The system comprises a reverse osmosis membrane element membrane shell (4), a cleaning water tank (16), a concentrated water pipeline (8), a second rotameter (92), a third pressure pipeline (53) and a pressure meter assembly (2), wherein the concentrated water pipeline (8) is arranged in parallel and has at most three concentrated water pipelines, the initial end of each concentrated water pipeline (8) is respectively connected with a concentrated water outlet of each reverse osmosis membrane element membrane shell (4), and the tail end of each concentrated water pipeline is connected with the cleaning water tank (16); wherein the number of the water inlet pipeline (7), the water producing pipeline (3) and the concentrated water pipeline (8) is consistent with the number of the reverse osmosis membrane element membrane shells (4).
2. The off-line chemical cleaning device for reverse osmosis membrane according to claim 1, further comprising a water inlet pump (15), a cartridge filter (13), and a high pressure pump (12); the water inlet pump (15) is arranged on the side surface of the bottom of the cleaning water tank (16) and is connected with the input end of the security filter (13) through a pipeline, the output end of the security filter (13) is connected with the input end of the high-pressure pump (12) through a pipeline, and the output end of the high-pressure pump (12) is connected with the starting end of the water inlet pipeline (7).
3. The off-line chemical cleaning device for reverse osmosis membranes according to claim 1 or 2, characterized in that each water inlet pipe (7) is provided with a water inlet valve (6), and each water inlet pipe (7) is converged into the same water inlet main pipe before passing through the water inlet valve (6) and is connected with a high-pressure pump (12).
4. A reverse osmosis membrane off-line chemical cleaning device according to claim 3, characterized in that each of said water producing pipes (3) is provided with a water producing valve (101) located between a first rotor flow meter (91) on the water producing pipe (3) and a reverse osmosis membrane element membrane shell (4) connected to the water producing pipe (3).
5. The offline chemical cleaning device for reverse osmosis membranes according to claim 4, characterized in that the connection between each of said water producing pipelines (3) and the corresponding second pressure pipeline (52) is located between the water producing valve (101) on the water producing pipeline (3) and the reverse osmosis membrane element membrane shell (4) connected to the water producing pipeline (3), a water producing pressure valve (111) is further disposed on each of said second pressure pipelines (52), and each of said water producing pressure valves (111) is located at the connection between the second pressure pipeline (52) where it is located and the corresponding water producing pipeline (3).
6. The off-line chemical cleaning apparatus according to claim 5, wherein each of said concentrate conduits (8) is provided with a concentrate valve (102) positioned between a second rotameter (92) on the concentrate conduit (8) and a reverse osmosis membrane element membrane shell (4) connected to the concentrate conduit (8).
7. The offline chemical cleaning apparatus according to claim 6, characterized in that the connection between each of said concentrate pipes (8) and the corresponding third pressure pipe (53) is located between the concentrate valve (102) on the concentrate pipe (8) and the reverse osmosis membrane element membrane shell (4) connected to the concentrate pipe (8), and a concentrate pressure valve (112) is further disposed on each of said third pressure pipes (53), and each of said concentrate pressure valves (112) is located at the connection between the third pressure pipe (53) where it is located and the corresponding concentrate pipe (8).
8. The offline chemical cleaning device for reverse osmosis membranes according to claim 7, wherein the pressure gauge assembly (2) is divided into a first pressure gauge and at most three second pressure gauges, the first pressure gauge is connected with the water inlet main pipeline, the number of the second pressure gauges is consistent with the number of the concentrated water pipelines (8) and the number of the water producing pipelines (3), and each second pressure gauge is respectively connected with each concentrated water pipeline (8) in a one-to-one correspondence manner and simultaneously connected with each water producing pipeline (3) in a one-to-one correspondence manner.
9. The off-line chemical cleaning plant for reverse osmosis membranes according to claim 1 or 2, characterized in that each of said water producing pipes (3) after passing through said first rotor flow meter (91) is gathered into one and the same water producing main pipe, connected to a cleaning water tank (16), on which a water producing main valve (21) is arranged, and each of said water concentrating pipes (8) after passing through said second rotor flow meter (92) is gathered into one and the same water concentrating main pipe, connected to the cleaning water tank (16), on which a water concentrating main valve (14) is arranged.
10. The off-line chemical cleaning device for reverse osmosis membrane according to claim 1 or 2, characterized in that the lower part of the cleaning water tank (16) is provided with a heating rod (18), and a thermometer (19) and a PH meter (20) are arranged on the side wall, and the bottom of the cleaning water tank (16) is further provided with a vent valve (17).

Description

Offline chemical cleaning device for reverse osmosis membrane Technical Field The utility model relates to the technical field of water treatment processes, in particular to an offline chemical cleaning device for a reverse osmosis membrane. Background At present, the daily output of the sewage in China is large in volume, and main sources include industrial wastewater, agricultural wastewater and domestic sewage, wherein the industrial wastewater is an important pollution source, and the sewage has the advantages of large volume, wide area, complex components, high toxicity and difficult treatment. At present, in order to realize zero emission of industrial wastewater, most of industrial wastewater (particularly high-salt wastewater) adopts a membrane treatment system in a concentration and recycling stage, mainly an ultrafiltration membrane and a reverse osmosis membrane, wherein the reverse osmosis membrane is an artificial semipermeable membrane with certain characteristics, and the artificial semipermeable membrane is made of a simulated biological semipermeable membrane. The reverse osmosis membrane principle is to apply a pressure greater than the osmotic pressure of the solution on the concentrated solution side, force water molecules to reversely (opposite to the natural osmosis direction) pass through the semipermeable membrane to enter the dilute solution, and most of solute (soluble solid) cannot pass through the semipermeable membrane and is trapped so as to realize separation from water. The pore size of the reverse osmosis membrane is very small, so that dissolved salts, colloids, microorganisms, organic matters and the like in water can be effectively removed. However, over time, the surface of the reverse osmosis membrane is easily polluted by suspended matters, colloid and salt scale and forms pollution accumulation, which not only can lead to the reduction of the water yield and the desalination rate of the system, but also can increase the operating pressure of the system, thereby indirectly increasing the running cost. The periodic cleaning can restore the performance of the system to the greatest extent, and the common cleaning modes at present are on-line chemical cleaning and off-line chemical cleaning aiming at reverse osmosis membrane pollution. The online cleaning is directly performed in a system non-stop state, mainly aims at mild pollution and scaling, and has a poor cleaning effect on membrane elements with long running time and relatively heavy pollution due to the cleaning of the series membrane components, the offline cleaning is more thorough, a professional offline cleaning device is required to be matched, the offline cleaning is to take out the reverse osmosis membrane elements from the membrane shell, the membrane elements are connected in parallel by using the special offline cleaning device for cleaning, the cleaning effect is obvious, the working capacity of the membrane elements after cleaning is recovered more thoroughly, the method is suitable for treating the problems of serious pollution and scaling, and the method can deeply clean stubborn stains in the membrane elements and prolong the service life of the membrane elements. The existing offline cleaning device for the reverse osmosis membrane has the following defects: 1. Meanwhile, a large number of reverse osmosis membrane elements are cleaned, and medicaments can bias flow and preferentially flow to paths with smaller resistance, such as membrane elements with lighter pollution, so that the medicaments are unevenly distributed to influence the cleaning effect; 2. For a plurality of membrane element groups connected in parallel, the performance of each reverse osmosis membrane element before and after cleaning cannot be monitored, and the cleaning effect is difficult to ensure. The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art. Disclosure of utility model The utility model aims to provide an offline chemical cleaning device for a reverse osmosis membrane, which solves the problems that in the prior art, when a large number of reverse osmosis membrane elements are cleaned simultaneously, the cleaning effect of part of the membrane elements is poor due to the bias flow of medicaments and the like, and the cleaning effect of each reverse osmosis membrane element before and after cleaning cannot be monitored. In order to achieve the above purpose, the utility model provides an offline chemical cleaning device for a reverse osmosis membrane, which comprises a cleaning water tank, a reverse osmosis membrane element membrane shell, a water inlet pipeline, a water production pipeline, a concentrated water pipeline, a pressure gauge component and a rotameter. At most three reverse osmosis membrane element membrane shells are arranged in parallel, and each reverse osmosis membrane element membrane shell can be internally provided