Method for monitoring and preventing biological pollution and colloid pollution of reverse osmosis membrane

A reverse osmosis membrane and bio-fouling technology, which is applied in chemical instruments and methods, osmosis/dialysis water/sewage treatment, semi-permeable membrane separation, etc., can solve the problems of preventing the popularization and use of polyamide membranes

Inactive Publication Date: 2012-11-07
翟葆光
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Problems solved by technology

[0005] The use of chloramine in the municipal wastewater reuse treatment has been proven to be effective in controlling the biofouling of the reverse osmosis system, but for industrial wastewater and slightly polluted surface water, detectable traces of ferrous ions are ubiquitous, and chloramine Threat to catalytic oxidation of polyamide membranes prevents widespread use

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  • Method for monitoring and preventing biological pollution and colloid pollution of reverse osmosis membrane
  • Method for monitoring and preventing biological pollution and colloid pollution of reverse osmosis membrane
  • Method for monitoring and preventing biological pollution and colloid pollution of reverse osmosis membrane

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Embodiment Construction

[0023] plan 1

[0024] For the reverse osmosis system with the risk of leakage of colloidal particles in the pretreatment system, especially the large-scale reverse osmosis system with ultrafiltration and microfiltration membrane method pretreatment with the possibility of broken wires, the pollution trapping device 4 should be installed before the high pressure pump , which can effectively intercept the leaked filter cake fragments of damaged membrane filaments and prevent them from entering the reverse osmosis membrane element. Since membrane pretreatment can remove most of the colloids and particles, and a small amount of broken wire leaks are colloidal particles with large sizes. After the pollution collection device is installed, the security filter can be omitted. Since the pollution trapping device can perform two-way online strong chemical cleaning, the cleaning effect can be guaranteed, and the necessity of offline cleaning of the membrane elements at the water inlet ...

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Abstract

The invention discloses a method for monitoring and preventing biological pollution and colloid pollution of a reverse osmosis membrane, which comprises the following steps: a pollutant gathering device is arranged before a reverse osmosis membrane reactor; the flowing situation of the roll-type reverse osmosis membrane system is simulated; and when the reverse osmosis membrane is polluted by colloid particulate matters and organism, the pollutant gathering device can be used for replacing the reverse osmosis membrane to load the pollution on a water inlet end membrane element of the regular reverse osmosis membrane, and the water inlet/outlet pressure difference and the pollution situation can be monitored on line at high precision. A core part of an intermediate device is a cylindrical filler element made of an inert material, and can be used for various strong online chemical cleaning, and quickly recovered when being plugged by the pollutants.

Description

technical field [0001] The invention relates to a method capable of preventing and monitoring reverse osmosis membrane biofouling and colloid particle pollution. Background technique [0002] Reverse osmosis membrane technology is currently the mainstream process for deep water purification and desalination. It is widely used in desalinated water production, advanced treatment of sewage reuse, seawater desalination and brackish water desalination. Colloidal particle pollution and biological pollution are always reverse osmosis technology. A major problem that cannot be completely overcome. Colloidal particle pollution and biological pollution will cause difficulties in system operation and maintenance and frequent high-intensity chemical cleaning, which will directly lead to a substantial increase in operating costs, reduced production capacity, reduced system performance, and reduced service life of membrane elements. Environmental issues and on-site operational safety issu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02B01D65/10G01N33/00C02F1/44
Inventor 翟葆光
Owner 翟葆光
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