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Process for purifying high fluorine and high sulfuric acid brine

A high-sulfate, purification process technology, applied in water/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve the problems of high equipment maintenance costs and large investment, and achieve low cost and equipment requirements Simple, long-lasting effect

Inactive Publication Date: 2010-04-21
NINGXIA UNIVERSITY
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Problems solved by technology

These methods require large investment and expensive equipment maintenance

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  • Process for purifying high fluorine and high sulfuric acid brine

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Embodiment Construction

[0014] The specific process of the present invention can be summarized by the "312" purification mode, the so-called "3", that is, three layers of filtration first, the first layer of coarse filtration to filter out suspended matter and impurities visible to the naked eye in the water; the second and third layers Respectively use the resin for anion and cation exchange to reduce the sulfate content in the water, and regenerate the resin by dosing regeneration, recycle, and reduce costs; the so-called "1" means that after entering the fourth and fifth layers One pH value adjustment measure is taken before the defluorinator, that is, citric acid is selected as the solution to adjust the pH value, and the higher pH value is reduced to about 6 to keep it in the acidic range. The so-called "2" refers to the last two layers of filtration. The fourth and fifth layers of filtration use a fluorine-removing molecular sieve to reduce the content of fluoride in water, and restore the activ...

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Abstract

The invention relates to a process for purifying high fluorine and high sulfuric acid brine. The process sequentially comprises the following steps: colation, weak acid ion exchange, weak base ion exchange, pH value regulation, filtering of a first level defluoridation molecular sieve and filtering of a secondary level defluoridation molecular sieve. The invention has simple equipment requirement, easy obtainment of raw materials, long service life and low cost and is particularly suitable for the large-area use of water in rural areas, and the larger the water quantity is, the lower the cost is.

Description

Technical field: [0001] The invention belongs to water treatment technology, in particular to a purification process of high-fluorine and high-sulfate brine. Background technique: [0002] The fluorine and sulfate content of groundwater in most parts of Ningxia is relatively high. Generally, the fluorine content of groundwater is 3.30mg / L, and the sulfate content is about 287mg / L, even higher in some areas. Drinking water with high fluoride content can easily cause fluorosis. [0003] Endemic fluorosis is a change in the body caused by chronic poisoning caused by long-term excessive intake of fluoride. It mainly affects the hard tissues of the human body, including teeth and bones, and also damages other soft tissues. The most obvious clinical manifestations are dental fluorosis and skeletal fluorosis. The damage of fluoride to teeth not only affects the appearance, but also affects the chewing and digestive functions. Skeletal fluorosis includes curvature of the bones, ma...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/42C02F1/66C02F1/58
Inventor 田军仓闫新房宋天华
Owner NINGXIA UNIVERSITY
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