CN215428248U

CN215428248U - Reverse osmosis forward belt cleaning device

Info

Publication number: CN215428248U
Application number: CN202120358758.8U
Authority: CN
Inventors: 乔明明
Original assignee: Dalian Dagu Mountain Sewage Treatment Co ltd
Current assignee: Dalian Dagu Mountain Sewage Treatment Co ltd
Priority date: 2021-02-09
Filing date: 2021-02-09
Publication date: 2022-01-07
Anticipated expiration: 2031-02-09

Abstract

A reverse osmosis cleaning device belongs to the technical field of reverse osmosis water treatment. The reverse osmosis membrane cleaning device comprises a cleaning water tank, a water pump, a cartridge filter, a reverse osmosis membrane shell and a controller. The reverse osmosis membrane cleaning device washes pollutants in the reverse osmosis membrane forward and reversely repeatedly through the process design combining forward cleaning and reverse cleaning, impurities on the inner surface of the reverse osmosis membrane are shaken off and washed, the pollutants on the reverse osmosis membrane are efficiently cleaned, the service life of the reverse osmosis membrane is prolonged, the cleaning period of the reverse osmosis membrane is prolonged, and the operation cost of the reverse osmosis process is greatly reduced. The device will wash water pump and manometer linkage and connect, and the water pressure through manometer monitoring pipeline realizes opening of the automation of water pump and stops, prevents that pressure from too big damage reverse osmosis membrane. The device simple structure, convenient operation, cleaning time are short, can resume reverse osmosis membrane's flux and water yield fast.

Description

Reverse osmosis forward belt cleaning device

Technical Field

The utility model relates to a reverse osmosis online backwashing device, and belongs to the technical field of reverse osmosis water treatment.

Background

Reverse osmosis is a new membrane separation technology developed in the 60 s. Reverse osmosis relies on reverse osmosis membranes to separate solutes from solvents in solution under pressure. The development of the reverse osmosis membrane is a core technology of the treatment method, can block all soluble salts and organic matters with molecular weight more than 100, but allows water molecules to permeate, and is widely applied to the processes of seawater and brackish water desalination, boiler water supply, industrial pure water preparation, electronic grade ultrapure water preparation, drinking pure water production, wastewater treatment, special separation and the like.

After the reverse osmosis is continuously operated for a period of time, the problems of water yield reduction, pressure difference increase, desalination rate reduction and the like can be caused due to the membrane pollution problem. The membrane pollution mainly comprises organic pollution, inorganic pollution and biological pollution formed by the attachment, growth and reproduction of microorganisms on the surface of the membrane. Organic matter often forms a cake layer on the membrane surface. One or more cationic species in the solution may deposit on the membrane surface beyond its solubility limit, causing severe fouling of the membrane surface and even physical damage to the membrane. For microbial contamination, the membrane surface may initially have only a single cell or cell mass, however the cells will multiply several times to form a biofilm cake. When the biological membrane reaches a certain thickness and surface coverage rate, the problem of membrane flux reduction is inevitably brought about. In addition, biofilm products can enhance the nucleation and crystallization kinetics of inorganic deposits, thereby exacerbating inorganic fouling of the film.

In actual operation, various fouling and blocking can be generated on the surface of the membrane after the reverse osmosis process is used for a long time, so that membrane pores are blocked, the water yield is reduced, and the polluted membrane is usually required to be cleaned regularly. The conventional cleaning is not thorough, the membrane pollution is increased, the reverse osmosis membrane is seriously polluted and blocked along with the increase of time, the produced water is further reduced, the quality of the discharged water is worse and worse, only a new membrane can be replaced at last, and the cost for replacing the new membrane is very high.

Reverse osmosis cleaning generally adopts the forward direction cleaning mode, and the direction of washing rivers is the same with the direction of intaking when reverse osmosis moves, and rivers during the washing are the same with the contaminated layer of pollutant, and forward cleaning can not effectively get rid of foretell membrane pollution problem usually, leads to the pollutant to wash not thorough, increases abluent time, and corresponding reduction produces water time, has increased the expense, has reduced the availability factor of membrane.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides a reverse osmosis membrane cleaning device which is simple in structure and low in manufacturing cost, prolongs the service life of a reverse osmosis membrane, and reduces the operation cost and the dosage of a manual cleaning agent.

The utility model adopts the following technical scheme: a reverse osmosis membrane cleaning device comprises a cleaning water tank water pump, a security filter, a reverse osmosis membrane shell and a controller, wherein a water outlet at the lower left part of the cleaning water tank is connected with a water inlet of the security filter through the water pump, a pressure gauge is arranged on a water outlet pipeline of the water pump, one path of the water outlet of the security filter is connected with a cleaning water inlet at the top of the cleaning water tank through a first valve, a second valve and a first cleaning pipe, a water inlet at the left bottom of the reverse osmosis membrane shell is connected on a pipe section between the first valve and the second valve through a water inlet pipe, a water outlet at the right bottom of the reverse osmosis membrane shell is connected with a pipe section at the right side of the second valve on the first cleaning pipe through a water outlet pipe and a water discharge valve, the other path of the water outlet of the security filter is connected with a pipe section at the left side of the water discharge pipe through a third valve and a third cleaning pipe, the left end of the reverse osmosis membrane shell is connected with a permeable water inlet at the upper left part of the cleaning water tank through a fourth valve and a first permeable water pipe through a left end pipeline, the right end of the first water seepage pipe is connected with a second water seepage pipe through a fifth valve and a second water seepage pipe through a right pipeline; the controller is electrically connected with the water pump and the pressure gauge, and the pressure gauge adopts an electric contact pressure gauge.

Six reverse osmosis membrane assemblies connected in series are arranged in the reverse osmosis membrane shell.

The utility model has the beneficial effects that: a reverse osmosis membrane cleaning device comprises a cleaning water tank, a water pump, a cartridge filter, a reverse osmosis membrane shell and a controller. The reverse osmosis membrane cleaning device washes pollutants in the reverse osmosis membrane forward and reversely repeatedly through the process design combining forward cleaning and reverse cleaning, impurities on the inner surface of the reverse osmosis membrane are shaken off and washed, the pollutants on the reverse osmosis membrane are efficiently cleaned, the service life of the reverse osmosis membrane is prolonged, the cleaning period of the reverse osmosis membrane is prolonged, and the operation cost of the reverse osmosis process is greatly reduced. The device will wash water pump and manometer linkage and connect, and the water pressure through manometer monitoring pipeline realizes opening of the automation of water pump and stops, prevents that pressure from too big damage reverse osmosis membrane. The device simple structure, convenient operation, cleaning time are short, can resume reverse osmosis membrane's flux and water yield fast.

Description of the drawings:

FIG. 1 is a schematic view of a reverse osmosis membrane cleaning apparatus.

In the figure, 1, wash the water tank, 2, the water pump, 2a, the manometer, 3, the cartridge filter, 3a, first valve, 3b, first scavenge pipe, 3c, the second valve, 3d, the third valve, 3e, the second scavenge pipe, 4, reverse osmosis membrane shell, 4a, the inlet tube, 4b, the drain pipe, 4c, the drain valve, 5, the left end pipeline, 5a, the fourth valve, 5b, the first pipe that permeates water, 5c, the fifth valve, 5d, the second pipe that permeates water, 5e, the right-hand member pipeline, 6, the controller.

Detailed Description

The present invention will be described with reference to the accompanying drawings and specific embodiments.

Fig. 1 shows a schematic structural view of a reverse osmosis membrane cleaning device. In the figure, the reverse osmosis membrane cleaning device comprises a cleaning water tank 1, a water pump 2, a security filter 3, a reverse osmosis membrane shell 4 and a controller 6, wherein a water outlet at the lower left part of the cleaning water tank 1 is connected with a water inlet of the security filter 3 through the water pump 2, and a water outlet pipeline of the water pump 2 is provided with a pressure gauge 2 a. One path of the water outlet of the cartridge filter 3 is connected with a cleaning water inlet at the top of the cleaning water tank 1 through a first valve 3a, a second valve 3c and a first cleaning pipe 3b, the left water inlet at the bottom of the reverse osmosis membrane shell 4 is connected to a pipe section between the first valve 3a and the second valve 3c through a water inlet pipe 4a, a water outlet at the right side at the bottom of the reverse osmosis membrane shell 4 is connected to a pipe section at the right side of the second valve 3c on the first cleaning pipe 3b through a water discharge pipe 4b and a water discharge valve 4c, the other path of a water outlet of the cartridge filter 3 is connected to a pipe section at the left side of the water discharge pipe 4c through a third valve 3d and a third cleaning pipe 3e, the left end of the reverse osmosis membrane shell 4 is connected to a permeate inlet at the upper left part of the cleaning water tank 1 through a left end pipeline 5a and a first permeate water permeating pipe 5b through a fourth valve 5a and a second permeate water permeating pipe 5d through a right end pipeline 5e, and the first permeate water permeating pipe 5b is connected to the right end through a fifth valve 5c and a second permeate water permeating pipe 5 d.

The controller 6 is electrically connected with the water pump 2 and the pressure gauge 2a, and the pressure gauge 2a adopts an electric contact pressure gauge. The pressure gauge 2a is arranged on an outlet pipeline of the water pump 2, and the pressure gauge 2a and the water pump 2 are in linkage control through the controller 6. When the reverse osmosis membrane is cleaned, if the outlet pressure of the water pump 2 exceeds the safe pressure, the controller controls the water pump 2 to stop for protection. Six reverse osmosis membrane assemblies connected in series are arranged in the reverse osmosis membrane shell 4.

The cleaning process of the reverse osmosis membrane cleaning device comprises the following steps: manual forward cleaning: adding a cleaning agent into the cleaning water tank 1 to prepare a cleaning solution, starting the water pump 2, opening the first valve 3a, the drain valve 4c and the fifth valve 5c, closing the second valve 3c, the third valve 3d and the fourth valve 5a, enabling the cleaning solution to flow into the security filter 3 through the water pump 2, then flowing into the reverse osmosis membrane shell 4 through the water inlet pipe 4a to carry out forward cleaning on the reverse osmosis membrane assembly, returning the cleaned sewage to the cleaning water tank 1 through the drain pipe 4b and the first cleaning pipe 3b, and returning a small part of the sewage to the cleaning water tank 1 through the right-end pipeline 5e, the fifth valve 5c and the second permeable pipe 5 d.

Manual reverse cleaning: adding a cleaning agent into the cleaning water tank 1 to prepare a cleaning solution, starting the water pump 2, opening the second valve 3c, the third valve 3d and the fourth valve 5a, closing the first valve 3a, the drain valve 4c and the fifth valve 5c, enabling the cleaning solution to flow into the security filter 3 through the water pump 2, then flowing into the reverse osmosis membrane shell 4 through the drain pipe 4b to reversely clean the reverse osmosis membrane module, returning the cleaned sewage into the cleaning water tank 1 through the water inlet pipe 4a and the first cleaning pipe 3b, and returning a small part of the sewage into the cleaning water tank 1 through the left-end pipeline 5, the fourth valve 5a and the first permeable pipe 5 b.

In practical application, the reverse osmosis membrane module can be cleaned by alternately cleaning in the forward direction and the reverse direction, and the cleaning times can be increased or decreased according to practical conditions.

Claims

1. The utility model provides a reverse osmosis membrane belt cleaning device, it is including wasing water tank (1), water pump (2), cartridge filter (3), reverse osmosis membrane shell (4) and controller (6), washs the water inlet that water tank (1) left lower part's delivery port passes through water pump (2) and connects cartridge filter (3), sets up manometer (2 a), its characterized in that on the outlet conduit of water pump (2): one path of a water outlet of the security filter (3) is connected with a cleaning water inlet at the top of the cleaning water tank (1) through a first valve (3 a), a second valve (3 c) and a first cleaning pipe (3 b), a water inlet at the left side of the bottom of the reverse osmosis membrane shell (4) is connected on a pipe section between the first valve (3 a) and the second valve (3 c) through a water inlet pipe (4 a), a water outlet at the right side of the bottom of the reverse osmosis membrane shell (4) is connected with a pipe section at the right side of a second valve (3 c) on the first cleaning pipe (3 b) through a water outlet pipe (4 b) and a water discharge valve (4 c), the other path of a water outlet of the security filter (3) is connected with a pipe section at the left side of the water discharge valve (4 c) on the water discharge pipe (4 b) through a third valve (3 d) and a third cleaning pipe (3 e), and the left end of the reverse osmosis membrane shell (4) is connected with a permeable water inlet of the cleaning water tank at the upper left upper part of the cleaning water tank (1) through a left end pipeline (5 a fourth valve (5 a) and a first permeable pipe (5 a left end pipeline (5 a left end The right end of the inlet is connected with a first permeable pipe (5 b) through a right pipeline (5 e) via a fifth valve (5 c) and a second permeable pipe (5 d);

the controller (6) is electrically connected with the water pump (2) and the pressure gauge (2 a), and the pressure gauge (2 a) adopts an electric contact pressure gauge.

2. A reverse osmosis membrane cleaning device according to claim 1, wherein six reverse osmosis membrane modules connected in series are arranged in the reverse osmosis membrane housing (4).