Preparation method for drinking water magnesian defluorinating agent

A technology for defluoridation agent and drinking water, which is applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc. It can solve the problems of poor fluoride reduction effect and secondary pollution prevention and control costs, so as to achieve no secondary pollution, Ease of use and unique preparation method

Active Publication Date: 2009-12-09
山西银圣科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a preparation method of magnesium defluoridation agent for drinking water in order to solve the problems of poor fluoride reduction effect, easy to cause secondary pollution and high prevention and control cost in the actual application of various existing defluoridation agent products

Method used

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Examples

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Effect test

Embodiment 1

[0035]A preparation method of a magnesium-based defluoridation agent for drinking water, comprising the following process steps: (1) sequentially adding magnesium oxide, magnesium carbonate, and magnesium hydroxide into a kneader, the mass ratio of the three is 3:2:1, and kneading The stirring speed of the machine is 900r / min, and the stirring time is fully mixed under the condition of 12min to obtain the magnesium dry base; (2) adding water to the magnesium dry base and making the solid-liquid ratio 1: 20, at a stirring speed of 50r / min, the stirring time is 15min, and the temperature is 35°C for water washing, and the equipment is a glass-lined reactor; (3) filter the washed magnesium on a dry basis, add water to rinse and control the solid-liquid ratio to 1: 10. Control the water content of the magnesium filter cake obtained at 40% at the same time, and use a belt filter or centrifuge for equipment; (4) dry the magnesium filter cake in a tunnel drying furnace at a temperatu...

Embodiment 2

[0037] A preparation method of a magnesium-based defluoridation agent for drinking water, comprising the following process steps: (1) adding magnesium oxide, magnesium carbonate, and magnesium hydroxide in sequence in a kneader, and the mass ratio of the three is 4:3:1, and kneading The stirring speed of the machine is 950r / min, and the stirring time is fully mixed under the condition of 17min to obtain the dry base of magnesium; min, the stirring time is 20min, and the temperature is 60°C for water washing, and the equipment is a glass-lined reactor; (3) filter the washed magnesium on a dry basis, add water to rinse and control the solid-to-liquid ratio to 1: 15. Control the water content of the magnesium filter cake obtained at 65% at the same time, and use a belt filter or centrifuge for equipment; (4) dry the magnesium filter cake in a tunnel drying furnace at a temperature of 220° C.; (5) Send the dried magnesia filter cake into a vertical swirl dynamic calciner for calci...

Embodiment 3

[0039] A preparation method of a magnesium-based defluoridation agent for drinking water, comprising the following process steps: (1) adding magnesium oxide, magnesium carbonate, and magnesium hydroxide in sequence in a kneader, the mass ratio of the three is 3.5:2.5:1, and kneading The stirring speed of the machine is 920r / min, and the stirring time is fully mixed under the condition of 16min to obtain the magnesium dry base; (2) the magnesium dry base is added with water and the solid-liquid ratio is 1: 25. min, the stirring time is 20min, and the temperature is 40°C for water washing, and the equipment is a glass-lined reactor; (3) filter the washed magnesium on a dry basis, add water to rinse and control the solid-to-liquid ratio to 1: 10. Control the water content of the magnesium filter cake obtained at 60% at the same time, and use a belt filter or centrifuge for equipment; (4) dry the magnesium filter cake in a tunnel drying furnace at a temperature of 210° C.; (5) Sen...

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PUM

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Abstract

The invention relates to a preparation method of defluorinating agent, in particular to a preparation method of drinking water magnesian defluorinating agent, solves the problems that the existing defluorinating agent is poor in defluorinating effect, secondary pollution can be initiated and prevention and control cost is high, and includes the steps that magnesium oxide, magnesium carbonate and magnesium hydroxide are mixed and fully stirred to obtain magnesian dry basis, then water is added for washing, the washed magnesian dry basis is filtered, and the obtained magnesium filter cake is dried, calcined and crushed, thus obtaining the magnesian defluorinating agent. The invention has the characteristics of high efficiency, simple use, unique preparation method, no secondary pollution, being odorless and non-toxic and adjusting measures to local conditions, can fundamentally cause the fluorine content in drinking water to reach the standard, can not produce regeneration pollution or by side effect, can not only reduce fluorine intake of organism but also make the best of appropriate amount of magnesium residue in water after defluorination to supplement magnesium for human body in high fluorine region, and develops positive antagonism on fluorine; meanwhile defluorinating effect is not affected by pH of high fluorine water, production technology is simple, and cost is relatively low, thus being applicable to be popularized and used on a large scale.

Description

technical field [0001] The invention relates to a preparation method of a fluoride-removing agent, in particular to a preparation method of a magnesium-based fluoride-removing agent for drinking water. Background technique [0002] Fluorine is one of the essential trace elements for the human body, but excessive absorption of fluorine by the human body can lead to fluorosis, dental fluorosis, skeletal fluorosis, digestive dysfunction, bone and soft tissue damage, joint deformation and paralysis, loss of working ability, and inability to take care of oneself. The human liver, heart, and kidney are damaged, and the number of male sperm is reduced. According to relevant reports, except for some provinces and regions such as Shanghai and Hainan, the problem of endemic drinking water fluorosis is quite common. There are problems such as wide epidemic area, great harm and difficult treatment. major issues. [0003] As we all know, the main way of human fluorosis is caused by exc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/58C02F101/14
Inventor 白世海范太其张忠慧
Owner 山西银圣科技有限公司
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