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Defluorination agent and application thereof

A technology of medicament and coagulant aid, applied in water pollutants, water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve high investment and operation costs, frequent and complicated regeneration and backwashing, and is not suitable for industrial Wastewater and other problems, achieve the effect of fast fluoride removal, good fluoride removal effect, and elimination of electrostatic repulsion

Inactive Publication Date: 2020-08-07
SGIS SONGSHAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, excessive aluminum salts need to be controlled in drinking water. High aluminum salts in water can easily lead to the probability of Alzheimer's disease
[0006] Traditional advanced treatment methods include alumina adsorption method, aluminum-loaded ion resin exchange method, reverse osmosis method, etc., but the investment cost and operating cost are generally high, and the requirements for influent water quality are strict, and regeneration and backwashing are frequent and complicated. Suitable for drinking water, not suitable for industrial wastewater

Method used

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  • Defluorination agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A fluoride removal agent composed of the following components in mass fractions: 40% desulfurization sludge, 20% ferrous sulfate heptahydrate, 10% polyferric sulfate, 3% activated silicate, 15% lanthanum chloride, 12% lanthanum nitrate .

[0028] Mix the ingredients of the formula (the desulfurization sludge is solid waste from steel mills, and the others are commercially available products) to prepare an efficient defluorinating agent;

[0029] See figure 1 , Take phenol cyanide wastewater from a steel plant as the fluorine-containing wastewater to be treated. The pH of the fluorine-containing wastewater to be treated is 7.80 and the fluoride ion concentration is 36mg / L. The prepared defluorinating agent SGDF1 is used to treat the fluorine-containing wastewater. To investigate the fluoride removal effect of the fluoride removal agent, the specific steps are as follows:

[0030] (1) Dissolve 1 mg of the prepared defluorinating agent in deionized water to prepare a solution w...

Embodiment 2

[0033] A fluoride removal agent consisting of the following components in mass fractions: 40% desulfurized sludge, 20% ferrous sulfate heptahydrate, 10% polymeric ferric sulfate, 3% activated silicic acid, 20% lanthanum chloride, 7% lanthanum nitrate .

[0034] Mix the ingredients of the formula (all commercially available products) uniformly to prepare a fluoride removal agent;

[0035] Take continuous casting turbid circulating water from a steel plant as the fluorine-containing wastewater to be treated. The pH of the fluorine-containing wastewater to be treated is 7.90 and the fluoride ion concentration is 45mg / L. The prepared defluorinating agent SGDF1 is used to treat the fluorine-containing wastewater. Perform treatment to investigate the fluoride removal effect of the fluoride removal agent. The specific steps are as follows:

[0036] (1) Dissolve 1 mg of the prepared defluorinating agent in deionized water to prepare a solution with a mass fraction of 10 wt%; prepare 1 part ...

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Abstract

The invention relates to a defluorination agent. The defluorination agent comprises the following components in percentage by weight: 30-40% of desulfurized sludge, 10-20% of ferrous sulfate heptahydrate, 10-20% of polyferric sulfate, 3-5% of a coagulant aid, 10-30% of lanthanum chloride and 5-15% of lanthanum nitrate. In use, the defluorination agent is dissolved in deionized water to prepare a defluorination agent solution, and the defluorination agent solution prepared in a step S1 is added into fluorine-containing wastewater. When the defluorination agent is used for treating the fluorine-containing wastewater, a fluorine removal speed is high, fluorine removal effect is good, and the defluorination agent is suitable for industrial wastewater.

Description

Technical field [0001] The invention relates to the technical field of a fluoride removal agent, more specifically, it relates to a fluoride removal agent and its application. Background technique [0002] Due to the use of fluorine-containing materials such as coking coal, fluorite and protective slag in the whole process steel plant, part of the wastewater enters the process. Therefore, the wastewater of coking phenol cyanide wastewater, converter turbid ring and continuous casting turbid ring has high fluoride content, exceeding the direct discharge limit of iron and steel industry wastewater. Value (10mg / L) is 4 to 5 times, there is an urgent requirement to reduce fluoride in wastewater. On the other hand, the water quality standards for Class IV and V surface waters require the fluoride standard to be ≤1.5 mg / L, forcing iron and steel companies that discharge wastewater into surface waters to further control the discharge concentration of fluoride in wastewater. [0003] At p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/56C02F101/14
CPCC02F1/5236C02F1/5245C02F1/56C02F2101/14
Inventor 付勇平孙普罗咏张志雄
Owner SGIS SONGSHAN CO LTD
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