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Reverse cleaning system including off line module of reverse osmosis membrane

A reverse osmosis membrane module and backwashing technology, applied in the field of off-line backwash cleaning system, can solve the problems that the reverse osmosis membrane cannot be applied, cannot be peeled off from the membrane surface, and the cleaning effect is not good, so as to simplify the pretreatment process and reduce the water quality Requirements, the effect of reducing operating costs

Inactive Publication Date: 2005-11-16
TIANJIN SEA WATER DESALINATION & COMPLEX UTILIZATION INST STATE OCEANOGRAPHI
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  • Abstract
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Problems solved by technology

[0034] Although backflushing can make the membrane clean effectively, the conventional backflushing method cannot be applied to reverse osmosis membranes.
Reverse osmosis is an asymmetric structure and cannot withstand the back pressure formed by the conventional recoil process on the membrane
The current reverse osmosis membrane group, because the backwash of the reverse osmosis membrane cannot be realized, during the cleaning process, some pollutants that are tightly bonded to the membrane surface cannot be peeled off from the membrane surface, resulting in poor cleaning effect
After the reverse osmosis membrane is cleaned several times, the water flux will drop significantly

Method used

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  • Reverse cleaning system including off line module of reverse osmosis membrane
  • Reverse cleaning system including off line module of reverse osmosis membrane
  • Reverse cleaning system including off line module of reverse osmosis membrane

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Embodiment Construction

[0042] The present invention is described in detail below in conjunction with embodiment.

[0043] The invention provides an off-line backwashing system for a reverse osmosis membrane module. The system consists of a positive washing system, a backwashing system, a membrane container and connecting pipelines and valves. This system is used for off-line cleaning of reverse osmosis membrane components. In order to improve the effect of off-line cleaning, this system uses the principle of osmosis. Under the premise of ensuring that the reverse osmosis does not bear back pressure, the fresh water passes through the reverse osmosis membrane under the action of osmotic pressure and enters the concentrated water side cleaning solution with added salt. , so that the reverse osmosis membrane is backwashed, which can effectively improve the cleaning effect. The principle of backwashing is as follows:

[0044] According to the dissolution-diffusion separation mechanism of reverse osmo...

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Abstract

An off-line reverse flushing system for reverse osmosis membrane module is composed of the water tank unit consisting of forward flushing water tank and reverse flushing water tank, the membrane container, and the water pump unit consisting of forward flush water pump and reverse flushing water pump. They are communicated with each other via valves and pipelines.

Description

technical field [0001] The invention relates to a water treatment system, in particular to an off-line recoil cleaning system for a reverse osmosis membrane. It is suitable for off-line cleaning of reverse osmosis membrane components. Background technique [0002] The reverse osmosis desalination system has been widely used in the water treatment industry. Its principle is: under the action of external pressure, some components in the aqueous solution are selectively passed through a special material and processing method, which has Semi-permeable membrane (reverse osmosis membrane), so as to achieve the purpose of desalination, purification or concentration separation. [0003] At present, industrial reverse osmosis membranes are mainly asymmetric membranes. That is, the reverse osmosis membrane consists of a thin dense surface (active layer) and a porous support layer below it. The active layer is truly selective to the mass transfer process and basically determines the...

Claims

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Application Information

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IPC IPC(8): C02F1/44
Inventor 阮国岭初喜章赵河立
Owner TIANJIN SEA WATER DESALINATION & COMPLEX UTILIZATION INST STATE OCEANOGRAPHI
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