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Process for refining super filter and secondary reverse osmosis high purity water

A two-stage reverse osmosis and high-purity water technology, applied in the direction of osmosis/dialysis water/sewage treatment, etc., can solve the problems of high operating costs, complicated operation, and bulky volume, and achieve improved raw water utilization, extended service life, and reduced device volume Effect

Inactive Publication Date: 2005-10-19
ZHEJIANG STONE ENVIRONMENTAL ENG CO LTD
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Problems solved by technology

[0002] At present, the two-stage reverse osmosis process for producing pure water has been widely used in beverage, chemical, electric power, electronics and other industries due to its outstanding advantages such as environmental protection, fully automatic operation, and stable effluent quality. However, the existing two-stage reverse osmosis The reverse osmosis pure water preparation process also has some shortcomings. For example, the conductivity of the produced water can only reach 2-10μs / cm; the utilization rate of raw water is also low; most of the raw water pretreatment processes in the process use Fine sand filtration, activated carbon filtration and precision filter filtration, the above pretreatment devices are not only bulky, complicated to operate, and high in operating costs, but also often difficult to achieve the quality of pretreated water when the raw water contains many pollutants and the water quality is poor Requirements, so that the reverse osmosis membrane is easily polluted and the service life is shortened

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  • Process for refining super filter and secondary reverse osmosis high purity water

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Embodiment Construction

[0008] The present invention will be further described below with reference to the accompanying drawings.

[0009] Raw water (city tap water) 1 is sent to ultrafilter 3 through pipeline 2, and the ultrafiltered water filtered by the ultrafilter is sent to ultrafiltered water storage tank 5 through pipeline 4, and the inlet of first-level high-pressure pump 7 is stored with ultrafiltered water. The tank outlet pipe 6 is connected, and the outlet is connected with the inlet pipe 8 of the first-stage reverse osmosis device 9. The produced water treated by the first-stage reverse osmosis device 9 is sent to the intermediate water tank 13 through the pipeline 10, and at the same time, it passes through the lye metering pump. 12. Add the NaOH solution in the lye tank 11 into the intermediate water tank 13 in a certain proportion, the inlet of the secondary high pressure pump 15 is connected with the outlet pipe 14 of the intermediate water tank, and the outlet is connected with the w...

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Abstract

The high purity water preparing process includes pre-treatment of raw water in a pre-treating apparatus, reverse osmosis in the first stage of reverse osmosis apparatus and reverse osmosis in the second stage of reverse osmosis apparatus. The pre-treating apparatus is one ultrafiltering device, and the concentrated water from the second stage of reverse osmosis apparatus is back flowed partially to the first stage of high pressure water tank or water inlet and partially to the second stage of high pressure water tank or water inlet. The present invention has pure water product with conductivity of 1 microsiemen / cm and less blocking, high water utilization and other advantages.

Description

technical field [0001] The invention relates to a process for preparing pure water by utilizing ultrafiltration and reverse osmosis membrane treatment. Background technique [0002] At present, the two-stage reverse osmosis method for producing pure water has been widely used in beverage, chemical, electric power, electronics and other industries due to its outstanding advantages such as green environmental protection, fully automatic operation, and stable effluent quality. There are also some shortcomings in the reverse osmosis pure water preparation process. For example, the conductivity of the produced water can only reach 2-10 μs / cm; the utilization rate of the raw water is also low; the raw water pretreatment process in the process is mostly used Fine sand filtration, activated carbon filtration and precision filter filtration, the above-mentioned pretreatment devices are not only bulky, complicated to operate, and expensive to operate, but also ...

Claims

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Application Information

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IPC IPC(8): C02F1/44
Inventor 陈浩莘仲明
Owner ZHEJIANG STONE ENVIRONMENTAL ENG CO LTD
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