Cleaning and regenerating device and cleaning and regenerating method for waste reverse osmosis membrane of thermal power plant

A technology of reverse osmosis membrane and regeneration device, which is used in semi-permeable membrane separation, chemical instruments and methods, osmosis/dialysis water/sewage treatment, etc. It can solve the problems of less research on roll reverse osmosis membrane cleaning and achieve high environmental protection. value, reducing the transmembrane pressure difference, optimizing the effect of cleaning process parameters

Pending Publication Date: 2021-11-30
HANGZHOU WATER TREATMENT TECH DEV CENT +2
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Gas-liquid two-phase cleaning is relatively mature in the cleaning of microfiltration and ultrafiltration membranes, but there are few related studies on the cleaning of roll-type reverse osmosis membranes.

Method used

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  • Cleaning and regenerating device and cleaning and regenerating method for waste reverse osmosis membrane of thermal power plant
  • Cleaning and regenerating device and cleaning and regenerating method for waste reverse osmosis membrane of thermal power plant
  • Cleaning and regenerating device and cleaning and regenerating method for waste reverse osmosis membrane of thermal power plant

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Embodiment Construction

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0052] as attached figure 1 As shown, a cleaning and regeneration device for a waste reverse osmosis membrane in a thermal power plant includes a membrane module 1, and also includes: a chemical cleaning module, a clean water washing module and an air washing module communicated with the membrane module 1;

[0053] The chemical cleaning assembly includes a cleaning water tank 21, a pipeline one 22, a booster pump 23, a pipeline two 24, a pipeline...

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Abstract

The invention discloses a cleaning and regenerating device and a cleaning and regenerating method for a waste reverse osmosis membrane of a thermal power plant, the best effect is achieved by optimizing the device structure and cleaning process parameters, cleaning is performed by adopting a cleaning mode combining forward cleaning and reverse cleaning with different cleaning agents, the effect of reducing the transmembrane pressure difference of the waste membrane is obvious, damage to the membrane desalination rate is low, the water yield of the cleaned waste membrane element is about 1.5-2.5 times that of a new membrane, the desalination rate can reach 95-97.5%, and the device can be recycled in scenes with requirements on low energy consumption, high flux and low desalination rate, and has high environmental protection value.

Description

technical field [0001] The invention relates to the technical field of osmotic membrane treatment, and more specifically relates to a cleaning and regeneration device and a cleaning and regeneration method for waste reverse osmosis membranes in thermal power plants. Background technique [0002] Reverse osmosis technology is currently the most efficient and widely used water desalination technology in the field of boiler water preparation in thermal power plants. However, composite polyamide membranes will inevitably produce membrane fouling after running for a certain period of time. Generally, the service life of commercial low-pressure reverse osmosis membranes is about 3 to 5 years. After the service life is exceeded, millions of membrane elements are discarded every year. This not only brings high membrane replacement and waste membrane treatment costs to thermal power plants, but also may bring huge environmental risks. Although the rejection rate and filtration perf...

Claims

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Application Information

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IPC IPC(8): B01D65/02C02F1/44C02F103/02
CPCB01D65/02C02F1/441C02F2103/02C02F2303/16Y02A20/131Y02A20/144
Inventor 吴雅琴诸剑锋翁建明张贺徐浩然朱力黄旻旻
Owner HANGZHOU WATER TREATMENT TECH DEV CENT
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