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Improved fluorine removal agent

A technology of defluoridation agent and fluoride ion, which is applied in water pollutants, water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. It can solve the problem that it is difficult to meet the national drinking water standard, the adsorption capacity is low, and the requirements cannot be met, etc. problem, to achieve good defluoridation effect, improve precipitation effect, and simple equipment requirements

Inactive Publication Date: 2020-02-25
昆山欣余清环保材料有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the treatment effect of traditional calcium-based materials is not ideal, the adsorption capacity is low, and it takes a long time to remove fluoride, so it is difficult to meet the national drinking water standards. With the further stringent environmental protection indicators and the upcoming fluoride ion emission standards, Conventional calcium defluoridation has been unable to meet the requirements

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  • Improved fluorine removal agent

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Embodiment Construction

[0024] The preferred embodiments of the present invention are described in detail below, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0025] This embodiment: an improved fluoride removal agent comprising 25wt.% to 35wt.% of ferrous sulfate, 5wt.% to 15wt.% of iron-free alumina, 5wt.% to 15wt.% of polymer flocculant and The remaining amount of deionized water.

[0026] The polymer flocculant is at least one of polyacrylamide and polyvinyl alcohol.

[0027] The preparation method of this improved fluoride removal agent comprises the following steps:

[0028] S1. Put 25wt.% to 35wt.% ferrous sulfate, 5wt.% to 15wt.% iron-free alumina and the rest of deionized water into the reactor, and heat the reactor at 30°C ~60°C, and stirring, after all dissolved, keep warm for 2-3 hours to obtain the mixture;

[0029] S2. Add polymer flo...

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Abstract

The invention discloses an improved fluorine removal agent, and a preparation method and a use method thereof. The fluorine removal agent comprises ferrous sulfate, nonferrous alumina, water and a polymeric flocculant. The preparation method comprises the following steps: S1, putting ferrous sulfate, nonferrous alumina and water into a reaction kettle, heating the reaction kettle, and performing stirring to achieve complete dissolving in order to obtain a mixture; S2, taking and adding the polymeric flocculant into the mixture obtained in step S1; and S3, performing mixing and stirring, and adjusting the pH value of the obtained mixture to 3 with an acidic pH regulator after complete cooling is performed in order to obtain the improved fluorine removal agent. The use method comprises the following steps: S1, detecting the fluorine ion concentration of to-be-treated water; S2, adding the improved fluorine removal agent according to the detection result of the fluorine ion concentrationof the to-be-treated water; S3, controlling the pH value of the to-be-treated water to be 6.5-7.0; and S4, carrying out a standing reaction on the treated water obtained after the addition of the improved fluorine removal agent for 30 min or above. The improved fluorine removal agent prepared by the preparation method has a good fluorine removal effect after the use steps.

Description

technical field [0001] The invention relates to the technical field of water treatment chemicals, in particular to an improved defluoridation agent for water treatment. Background technique [0002] Fluorine is a trace element that widely exists in nature and is also one of the essential trace elements for the human body. The mass concentration of fluorine is too high or too low to cause harmful effects on human health. Therefore, according to the "Drinking Water Hygienic Standard" (GB 5749-2006), the mass concentration of fluorine in drinking water should be 0.5-1.0mg / L. In recent years, excessive fluorine content in groundwater in Xinjiang region has caused various fluoride diseases in human body in some areas, which has aroused people's research on groundwater defluoridation technology. So far, fluoride removal methods can be roughly divided into the following categories: including electrodialysis, precipitation, ion exchange, membrane filtration technology and adsorptio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C02F1/52C02F101/14
CPCC02F1/5236C02F1/56C02F2101/14
Inventor 余玉宝
Owner 昆山欣余清环保材料有限公司
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