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Multi-effect defluorination agent as well as preparation method and application thereof

A technology of medicament and liquid medicament, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, etc. Achieve stable removal effect, low comprehensive cost and good defluorination effect

Active Publication Date: 2021-08-06
CSD BEIJING E P DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical precipitation method has the advantages of convenient treatment and low cost, but there are disadvantages such as huge equipment, difficulty in reaching the standard after treatment, and slow sedimentation and difficult dehydration.
The coagulant used in the existing coagulation and sedimentation method is relatively simple, and there are problems such as large dosage and high sludge output.
Moreover, the existing coagulation and sedimentation methods are less able to meet the requirements of surface water environmental quality standards

Method used

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  • Multi-effect defluorination agent as well as preparation method and application thereof
  • Multi-effect defluorination agent as well as preparation method and application thereof
  • Multi-effect defluorination agent as well as preparation method and application thereof

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preparation example Construction

[0067] The present invention also provides a preparation method of a multi-effect defluoridation agent, comprising the following steps:

[0068] Mix the components in proportion.

[0069] In a specific embodiment of the present invention, after mixing the components in proportion, water is added to obtain a liquid medicine.

[0070] In another embodiment of the present invention, the preparation method includes the following steps:

[0071] The polymeric aluminum iron salt is mixed evenly with the aqueous solution containing the polymeric aluminum salt, and then the oxidizing agent, aluminum chlorohydroxide, polydimethyl diallyl ammonium chloride, iminodiacetic acid and acetate are added, and the mixture is evenly mixed. Further, the oxidizing agent, aluminum hydroxychloride, polydimethyldiallylammonium chloride, iminodiacetic acid and acetate are added in sequence.

[0072] In actual operation, the polyaluminum salt can be formulated into a solution in advance, or the liquid ...

Embodiment 1

[0101] This embodiment provides a multi-effect fluoride removal agent, including the following components in parts by weight:

[0102] Polyaluminum Chloride with Al 2 o 3 4 parts in total, polyaluminium-iron salt as Al 2 o 3 9 parts in total, 3 parts of potassium ferrate, 3.6 parts of sodium acetate, 0.9 parts of polydimethyldiallylammonium chloride, 1.8 parts of iminodiacetic acid, 2.3 parts of aluminum chloride and 17 parts of water. Wherein, polyaluminum ferric salts include polyaluminum ferric sulfate and polyaluminum ferric chloride.

[0103] The multi-effect fluoride removal agent can be prepared from industrial-grade raw materials, and the preparation method of the multi-effect fluoride removal agent includes the following steps:

[0104] (a) take technical grade liquid polyaluminum chloride (in Al 2 o 3 10% by weight) 40%, industrial grade solid polyaluminum ferric chloride 15%, industrial grade solid polyaluminum ferric sulfate 15%, industrial grade liquid potas...

Embodiment 2

[0112] This embodiment refers to the multi-effect defluoridation agent of Example 1 and its preparation method, the only difference being:

[0113] The fluoride removal agent includes the following components in parts by weight:

[0114] Polyaluminum Chloride with Al 2 o 3 3 parts in total, polyaluminium-iron salt with Al 2 o 3 8 parts in total, 2 parts of potassium ferrate, 3 parts of sodium acetate, 0.5 parts of polydimethyldiallylammonium chloride, 1 part of iminodiacetic acid, 2 parts of aluminum chloride and 20 parts of water. Wherein, the polyaluminum ferric salt is polyaluminum ferric sulfate.

[0115] Calculate and weigh the corresponding industrial-grade raw materials according to the amount of the above-mentioned active ingredients, and prepare the multi-effect fluorine-removing agent according to the preparation method of Example 1.

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Abstract

The invention relates to the technical field of fluorine-containing wastewater treatment, in particular to a multi-effect defluorination agent as well as a preparation method and application thereof. The invention relates to a multi-effect defluorination agent which comprises the following components in parts by weight: 3-10 parts of polymeric aluminum salt (in terms of Al2O3), 8-15 parts of polymeric aluminum ferric salt (in terms of Al2O3), 2-10 parts of an oxidizing agent, 3-6 parts of acetate, 0.5-1.5 parts of poly dimethyl diallyl ammonium chloride, 1-3 parts of iminodiacetic acid and 2-3 parts of aluminum chlorohydrate. According to the defluorination agent, the concentration of fluorine ions in treated water can be smaller than or equal to 1.0 mg, the requirement of surface water class III specified by GB3838-2002 Environmental Quality Standard for Surface Water can be met, thedefluorination agent has the effects of removing fluorine, nitrogen, phosphorus and COD, the removal effect is stable, the high removal rate can be achieved under the condition of the low dosage, the dosage is small, the amount of sludge generated in the treatment process is small, the sludge is easy to treat, and the comprehensive cost is low.

Description

technical field [0001] The invention relates to the technical field of fluorine-containing wastewater treatment, in particular to a multi-effect fluoride removal agent and its preparation method and application. Background technique [0002] Fluorine is one of the essential trace elements for the human body. Trace amounts of fluorine can promote the growth and development of children and prevent dental caries. The daily intake of fluoride for adults is generally 1.0-1.5mg / L. Scientific research has found that fluorine has a strong affinity for calcium and phosphorus in the human body, it can destroy the normal metabolism of calcium and phosphorus in the body, and can inhibit the activity of certain enzymes, which will cause a series of diseases including: dental fluorosis, Skeletal fluorosis, kidney, liver, brain damage, immune dysfunction, pulmonary edema, pulmonary hemorrhage, mental decline in children and other diseases. Therefore, excessive intake can be harmful to hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/54C02F1/56C02F101/14
CPCC02F1/5236C02F1/56C02F1/54C02F2101/14
Inventor 王恒孙庆峰
Owner CSD BEIJING E P DEV CO LTD
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