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Composite fluorine removal agent and preparation method thereof

A defluoridation agent and composite technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve the problems of low utilization rate and poor defluoridation effect, and achieve high utilization rate and inorganic pollution Small amount of mud, good defluoridation effect

Inactive Publication Date: 2018-11-30
湖北蓝钴环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the defects of poor defluorination effect and low utilization rate of fluorine-removing agents in the prior art, and provide a composite defluoride agent and its preparation method to solve the above problems

Method used

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  • Composite fluorine removal agent and preparation method thereof
  • Composite fluorine removal agent and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The invention discloses a composite type defluoridation agent, which is prepared from the following components according to the mass percentage: 70.00% of calcium salt, 15.80% of water, 5.5% of water glass, 2.00% of acid, 1.50% of iron salt, and 5.00% of aluminum salt %, polydimethyldiallylammonium chloride 0.20%.

[0023] The preparation method of composite type defluorination agent of the present invention is completed by the following steps:

[0024] (1), inject 3500kg 30% liquid calcium chloride into 5 cubic enamel reaction kettle, add water 790kg, stir for 5min, fully mix evenly;

[0025] (2), continue to add hydrochloric acid 100kg to above-mentioned reactor, stir 5min, fully mix;

[0026] (3), step (2) under agitation state, cast ferrous chloride tetrahydrate 75kg continuously, stir 5min, fully dissolve;

[0027] (4), step (3) in the stirring state, continue to add 250 kg of anhydrous aluminum chloride, stir for 20 minutes, fully dissolve, and control the heati...

Embodiment 2

[0032] The invention discloses a composite type defluoridation agent, which is prepared from the following components according to the mass percentage: calcium salt 68.20%, water 17.00%, water glass 6.5%, acid 3.00%, iron salt 1.00%, aluminum salt 4.00% %, polydimethyldiallylammonium chloride 0.30%.

[0033] The calcium salt is 30% liquid calcium chloride, the acid is hydrochloric acid, the iron salt is ferrous chloride tetrahydrate, and the aluminum salt is anhydrous aluminum chloride.

[0034] The present invention also discloses a preparation method of the above-mentioned composite defluorinating agent, the specific steps are as follows:

[0035] (1), according to the above mass percentage, inject calcium salt into the enamel reaction kettle, add water, stir for 7 minutes, and fully mix evenly;

[0036] (2), continue to add acid in above-mentioned reactor, stir 7min, fully mix evenly;

[0037] (3), under the stirring state of step (2), drop into iron salt continuously, st...

Embodiment 3

[0046] Taking the actual application of fluorine-containing wastewater in a glass factory in Shenzhen as an example, the sewage station of the glass factory adopts a two-stage fluoride removal process. The first stage uses calcium chloride + calcium hydroxide + polyaluminum chloride + anionic polyacrylamide precipitation, the second The second stage uses the composite defluorinating agent prepared in Example 1 + anionic polyacrylamide precipitation, and the processing data are as follows in Table 1:

[0047] Table 1

[0048]

[0049] It can be known from Table 1 that the composite defluoridation agent prepared by the present invention has a better defluorination effect in wastewater.

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Abstract

The invention discloses a composite fluorine removal agent and a preparation method thereof. The composite fluorine removal agent is prepared from the following components: in percent by mass, 70.00%of calcium salts, 15.80% of water, 5.5% of water glass, 2.00% of acids, 1.5% of iron salts, 5.00% of aluminum salts and 0.20% of polydimethyldiallyl ammonium chloride, and the preparation method comprises the steps: injecting the calcium salts into an enamel reaction kettle, adding water, and performing full and even mixing; then adding the acids to the reaction kettle, and performing full mixing;continuously inputting the iron salts, performing full dissolution, adding the aluminum salts continuously, and performing full dissolution; slowly adding the water glass at an adding speed of 275 kg / h for an adding period of 1 h, adding the acids, and performing guarantee of a constant temperature; adding the polydimethyldiallyl ammonium chloride slowly and uniformly under the conditions of theconstant temperature and stirring, performing stirring for polymerization for 3 hours, transferring the polymerized product to a finished product barrel, and performing natural cooling to normal temperature so as to obtain the target product. The composite fluorine removal agent has the advantages of a good fluorine removal effect, a high utilization rate and the like.

Description

technical field [0001] The invention relates to the technical field of production of environmental water treatment defluoride chemicals, in particular to a composite defluoride agent and a preparation method thereof. Background technique [0002] Fluorine is one of the widely distributed elements in nature. The stock in the earth's crust is 0.065%, and the order number of the existing amount is 13. Fluorine is also an important trace element of life in the human body, mainly distributed in bones and teeth. The fluorine needed by the human body mainly comes from drinking water. Fluoride widely exists in natural water bodies. Excessive intake of fluoride will lead to fluorosis. If the fluorine content in water is less than 0.5ppm, the incidence of dental caries will reach 70% to 90%. , but if the fluoride content in drinking water exceeds 1ppm, the teeth will gradually produce spots and become brittle. The fluorine content is 0.5-1.0mg / l, so it is very necessary to strictly c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C02F1/52C02F1/28C02F101/14
CPCC02F1/288C02F1/5236C02F1/56C02F2101/14
Inventor 杨光张正刚陈华程诚
Owner 湖北蓝钴环保科技有限公司
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