Process for preparing industrial ultra-pure water by reverse osmosis postposition softener

A technology of reverse osmosis and softener, which is applied in the production process of industrial high-purity water, which can solve the problems of investment, large energy consumption, large floor area, inconvenient operation and maintenance, etc., and achieves small investment and long regeneration cycle , the effect of small footprint

Inactive Publication Date: 2007-12-12
上海三邦水处理技术有限公司
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Problems solved by technology

[0003] The present invention aims at the water inlet conditions with high hardness content in raw water, solves the problems existing in the prior art, such as large investment, energy consumption, large floor area, inconvenient operation and maintenance, etc., and provides a softener after reverse osmosis Process for preparing industrial ultrapure water by reverse osmosis, softener and continuous electrodeionization demineralizer (CDI)

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  • Process for preparing industrial ultra-pure water by reverse osmosis postposition softener

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[0016] Example: After the raw water is pretreated by the pretreatment facility 1, the scale inhibitor is added by the scale inhibitor dosing system 6, pressurized by the high-pressure pump 2, and supplied to the reverse osmosis membrane group 3 by the pipeline to remove the dissolved salts in the water and at the same time. Some large molecules and small particles that were not removed in the previous stage, etc. Its function is to pre-desalinate the pre-treated produced water with a desalination rate of 95% to 99%. The purpose of adding the scale inhibitor to the scale inhibitor dosing system is to prevent the hardness of the raw water from scaling in the reverse osmosis membrane group.

[0017] The reverse osmosis product water after the pre-desalination of the reverse osmosis membrane group 3 directly enters the softener 4 through the pipeline to remove the residual hardness in the reverse osmosis product water, that is, deep soften the reverse osmosis product water, the purpos...

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Abstract

The invention relates to a process of preparing industrial ultra-pure water with softening apparatus rear- mounted hyperfiltration apparatus. It comprises processes of hyper- filteration and softening pre- treated water, and preparation of high- purity water in continuous electric deion and desalt apparatus. The invention is characterized by reduced softening apparatus size, small occupation area, low investment, long regenerative period for softening apparatus, low energy consumption, small operational cost, simple operation and convenient maintenance.

Description

technical field [0001] The invention relates to a process for producing high-purity water for industrial use, in particular to a process for producing industrial ultra-pure water by placing a softener after reverse osmosis, and then directly entering a continuous electrodeionization demineralizer (CDI) . Background technique [0002] Ultrapure water is widely used in pharmaceutical, chemical, electronic and semiconductor industries. At present, the production process of ultrapure water is mostly the combination of reverse osmosis and electric demineralizer (CDI) after the raw water is pretreated. Among them, under the condition of raw water with high hardness content, in the pretreatment equipment before reverse osmosis, the softener is often used to soften the raw water first to reduce the hardness, so as to reduce the operating load of the subsequent reverse osmosis and electric desalter and prevent fouling. Although this process has the advantages of stable water quali...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44
CPCY02A20/131
Inventor 吴泽林
Owner 上海三邦水处理技术有限公司
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