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Novel liquid defluorination agent as well as preparation method and application thereof

A liquid and pharmaceutical technology, applied in the field of fluorine-containing wastewater treatment, can solve the problems of slow sedimentation process, low calcium salt utilization efficiency, failure to meet discharge standards, etc., to promote flocculation and sedimentation, good fluoride removal effect, and change flocs The effect of the structure

Active Publication Date: 2020-06-19
山东环瑞生态科技有限公司
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AI Technical Summary

Problems solved by technology

However, single use of CaO or Ca(OH) 2 To treat fluorine-containing wastewater, the generated CaF 2 The precipitate will be wrapped in Ca(OH) 2 The surface of the particles makes the utilization efficiency of calcium salts low, and the precipitation process is very slow, which can only reduce the concentration of fluoride ions to 20-30mg / L, which cannot meet the national emission standards
Existing by adding CaF 2 Crystal nucleus, simple use of calcium salt / aluminum salt / iron salt combined with flocculant to remove fluoride can only reduce the concentration of fluoride ion to 8-10mg / L, which can just meet the "Comprehensive Wastewater Discharge Standard" (GB8978-1996 )Require

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0025] A new type of liquid defluoridation agent, composed of the following components by mass fraction: polyaluminum chloride 25%, polyaluminum ferric chloride 17%, magnesium sulfate 9%, N,O-carboxymethyl chitosan 6%, alum 3%, purified water 40%.

[0026] The preparation steps of the above-mentioned novel liquid defluoridation agent are as follows: 25 parts by mass of polyaluminum chloride, 17 parts by mass of polyaluminum ferric chloride, and 9 parts by mass of magnesium sulfate are dissolved in 25 parts by mass of purified water to obtain a mixed solution I, Dissolve 6 parts by mass of N,O-carboxymethyl chitosan and 3 parts by mass of alum in 15 parts by mass of purified water to obtain a mixed solution II, and add the mixed solution II dropwise to the mixed solution I while stirring. Continue to stir for 30 minutes after the addition to obtain liquid defluoridation agent GMS-F4.

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PUM

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Abstract

The invention discloses a novel liquid defluorination agent as well as a preparation method and application thereof, and belongs to the technical field of fluorine-containing wastewater treatment. Theliquid defluorination agent is prepared from the following components in percentage by mass: 25% of polyaluminum chloride, 17% of polyaluminum ferric chloride, 9% of magnesium sulfate, 6% of N, O-carboxymethyl chitosan, 3% of a coagulant aid and 40% of purified water. When the defluorination agent disclosed by the invention is used for treating low-concentration fluorine-containing wastewater, the fluorine ion concentration of effluent can be less than or equal to 1.0 mg / L, and the fluorine removal effect is good.

Description

technical field [0001] The invention relates to a fluorine-removing agent and its preparation method and application, in particular to a novel liquid fluoride-removing agent and its preparation method and application, and belongs to the technical field of fluorine-containing wastewater treatment. Background technique [0002] Coal chemical wastewater is industrial wastewater generated in the coal chemical production process. The coal chemical production process uses coal as raw material to convert coal into gaseous, liquid, solid products and various chemical products through chemical production processes such as coal coking, coal gasification, coal liquefaction, and tar chemical production. The wastewater produced by this production process mainly includes coking wastewater, gasification wastewater and liquefaction wastewater. The pollutants contained in coal chemical wastewater mainly include fluoride and other pollutants. [0003] At present, the treatment methods of fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C02F1/52C02F101/14
CPCC02F1/56C02F1/5272C02F1/5236C02F2101/14Y02A20/131
Inventor 史贞峰尚勇李宝禄戚翠红
Owner 山东环瑞生态科技有限公司
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