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Nanofiltration reproduction method of waste reverse osmosis membrane element

A technology of reverse osmosis membrane and reverse osmosis composite membrane, which is applied in the field of reuse of waste reverse osmosis membrane elements, can solve the problems of high cost and single variety, and achieve the effect of simple regeneration process and resource utilization

Inactive Publication Date: 2011-05-18
ZHEJIANG SCI-TECH UNIV
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Problems solved by technology

[0009] Aiming at the existing reverse osmosis membrane elements being discarded in large quantities due to performance degradation and the shortcomings of high cost and single variety in the manufacture of nanofiltration membranes, the present invention proposes a nanofiltration regeneration method for discarded reverse osmosis membrane elements, which can not only effectively Realize the resource utilization of waste reverse osmosis membrane elements, and can open up a new way of manufacturing nanofiltration membranes

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  • Nanofiltration reproduction method of waste reverse osmosis membrane element

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Embodiment Construction

[0045] The implementation of the present invention is described in detail below:

[0046] Conventional reverse osmosis membrane cleaning solution circulation immersion cleaning treatment of discarded reverse osmosis membrane elements: inject a clear solution containing cleaning agent into the polluted membrane system. , surfactant, chelating agent, enzyme, etc. The cycle soaking treatment time is 30-600 minutes, and the temperature is 20-40°C. After cleaning, rinse the membrane elements with pure water.

[0047] Circular immersion modification treatment of waste reverse osmosis membrane elements with amine-containing solution: pass a certain concentration of amine-containing solution into the above-mentioned waste reverse osmosis membrane elements that have been conventionally cleaned, and perform cyclic immersion treatment on the membrane elements at a certain temperature. The amine in the amine-containing solution is usually ammonia, or dimethylamine, or ethylenediamine, o...

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Abstract

The invention relates to a reproduction method of a waste reverse osmosis membrane element, in particular to a nanofiltration reproduction method of the waste reverse osmosis membrane element. The nanofiltration reproduction method of the waste reverse osmosis membrane element is characterized by enabling a waste reverse osmosis membrane to have certain special functions of a nanofiltration membrane by carrying out soaking modification processing of an amine-containing solution on the surface of the waste reverse osmosis membrane and carrying out further performance regulation processing on the modified reverse osmosis membrane element by adopting a polymer membrane performance regulator on the basis of carrying out conventional chemical cleaning on the waste reverse osmosis membrane, thereby realizing the nanofiltration reproduction of the waste reverse osmosis membrane element. The invention can effectively realize the resource utilization of the waste reverse osmosis membrane element, develops a new manufacturing way of the nanofiltration membrane and has simpler reproduction process; and in addition, the nanofiltration reproduction method of the waste reverse osmosis membrane element has extensive applications.

Description

technical field [0001] The invention relates to a method for reusing waste reverse osmosis membrane elements, in particular to a nanofiltration regeneration method for waste reverse osmosis membrane elements. technical background [0002] Reverse osmosis membrane separation technology is a high-efficiency, energy-saving and green new separation technology with outstanding features such as simple equipment, mild operating conditions, large processing capacity, and high separation efficiency. Biological product separation, environmental engineering, food, medicine and other fields have been widely used, and have achieved good economic and social benefits; It has been more widely used and valued in the fields of seawater desalination, reclaimed water reuse, clean production, and drinking water purification. [0003] The core and basis of the reverse osmosis membrane separation technology is the high-performance reverse osmosis membrane. During the use of the membrane, as the s...

Claims

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Application Information

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IPC IPC(8): B01D65/06
Inventor 俞三传刘梅红
Owner ZHEJIANG SCI-TECH UNIV
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