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Backwashing type high-pressure reverse osmosis membrane filtration system

A reverse osmosis membrane and filtration system technology, applied in the field of high-pressure reverse osmosis membrane filtration system, can solve problems such as concentration polarization pollution, and achieve the effects of stable running time, simple implementation, and convenient maintenance

Pending Publication Date: 2021-07-23
NORTHEAST AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the concentration polarization and pollution problems generated in the high-pressure reverse osmosis membrane filtration process, and propose an online cleaning method without changing the operating conditions of the reverse osmosis membrane

Method used

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  • Backwashing type high-pressure reverse osmosis membrane filtration system
  • Backwashing type high-pressure reverse osmosis membrane filtration system
  • Backwashing type high-pressure reverse osmosis membrane filtration system

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Embodiment

[0025] see figure 1 Illustrate, a kind of backwashable high-pressure reverse osmosis membrane filtration system of present embodiment, it comprises high-concentration brine tank 1, raw water tank 2, reverse osmosis membrane reactor 3, filtered water tank 4, high-pressure pump 5, rear Pressure regulator 6, flow meter 7, high pressure small flow pump 8 and low pressure water pump 9;

[0026] First, put the sewage to be treated in the raw water tank 2, turn on the magnetic stirrer, and open the valve V 1 and V 3 , close valve V 2 and V 4 , open the high-pressure pump 5, run the backwashable high-pressure reverse osmosis membrane filtration system, send the sewage in the raw water tank 2 to the reverse osmosis membrane reactor 3, and adjust the rear pressure regulator 6 (the specific details of the rear pressure regulator The function is to control the operating pressure and the cross-flow rate on the membrane surface), observe the flow meter 7, and wait for the membrane fouli...

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Abstract

The invention provides a backwashing type high-pressure reverse osmosis membrane filtration system, belonging to the technical field of water treatment. The invention aims to solve various problems such as concentration polarization and pollution generated in a high-pressure reverse osmosis membrane filtration process. The backwashing type high-pressure reverse osmosis membrane filtration system comprises a high-concentration brine tank, a high-pressure pump, pressure gauges before and behind reverse osmosis membrane reactors, a rear pressure regulator and a flowmeter. In a normal filtering process, the reverse osmosis membrane filtration system normally runs (wherein a high-pressure reverse cleaning route is in a closed state); and when a flux is obviously reduced due to pollution, the high-pressure reverse cleaning system is opened, high-concentration saline water is injected into the water inlet side of the reactor, and the generated osmosis pressure exceeds the pressure of a high-pressure water pump, so filtered water reversely flows, and the effect of backwashing a membrane is achieved. The backwashing type high-pressure reverse osmosis membrane filtration system is applied to the field of water treatment.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to a backwashable high-pressure reverse osmosis membrane filtration system. Background technique [0002] In recent years, with the rapid development of my country's economy, the damage to the natural environment has become increasingly serious. A large amount of waste water containing various high-concentration inorganic salts and organic substances is discharged indiscriminately, resulting in frequent pollution of lakes and reservoirs around cities and towns. This not only reduces the utilization efficiency of water resources, causes serious ecological damage and huge economic losses, but also brings great hidden dangers to the health of human beings, animals and plants. Some important water pollution incidents may even cause serious political negative effects and social shocks. As a physical separation process, high-pressure reverse osmosis membrane technology has a ver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44B01D61/08
CPCC02F1/441B01D61/08
Inventor 张艳李爽
Owner NORTHEAST AGRICULTURAL UNIVERSITY
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