Preparation and regeneration method of water treatment defluoridation material

A filter material and raw material technology, which is applied in the regeneration of water treatment defluorination filter material and the preparation of water treatment defluorination filter material, and achieves the effect of good defluorination effect, good application prospect and good reproducibility.

Active Publication Date: 2013-06-19
徐彬清
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to avoid the deficiencies in the above-mentioned prior art, and the purpose is to provide a preparation method of a defluoridation filter material based on natural minerals, which is easy to implement, low in cost, and effective in defluoridation. High capacity, convenient operation and safety, no secondary pollution

Method used

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  • Preparation and regeneration method of water treatment defluoridation material
  • Preparation and regeneration method of water treatment defluoridation material

Examples

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Effect test

Embodiment 1

[0032] A kind of preparation method of the defluoridation filter material based on natural mineral, its steps are:

[0033] 1. Raw material selection, using natural calcium and magnesium minerals dolomite;

[0034] 2. Crushing, crushing the raw materials in step 1 and then sieving to obtain particles with a size of about 0.5 or 0.7 or 0.9 or 1.3 or 1.5 or 1.8 or 2.0mm without calcining;

[0035] 3. acid reaction, the granules obtained are placed in the reaction tank, and the phosphoric acid (H 3 PO 4 ) Soak raw materials, raw materials: phosphoric acid (H3 PO 4 ) with a mass volume ratio of 1:0.5, let stand for 2h or 4h or 6h, and remove the acid solution after the treatment;

[0036] 4. Alkali reaction, after the step 3 acid reaction, the particles are then soaked in 4% w / v sodium hydroxide (NaOH) solution for 4h or 6h or 8h, raw material: the quality of sodium hydroxide (NaOH) or potassium hydroxide (KOH) The volume ratio is 1:0.3. After the treatment, the alkali solutio...

Embodiment 2

[0042] A kind of preparation method of the defluoridation filter material based on natural mineral, its steps are:

[0043] 1. Raw material selection, using natural calcium and magnesium mineral calcite;

[0044] 2. Crushing, crushing the raw materials in step 1 and sieving to obtain particles with a size of about 0.8mm or 1.0mm or 1.2mm or 1.4mm;

[0045] 3. Calcination, put the material obtained in step 2 into a furnace (electric furnace or muffle furnace) for calcination, ensure that the raw materials in the furnace are evenly heated at 250°C or 270°C, and under the closed condition of normal pressure 0.1MPa, keep warm for 60 or 80 or Take out the material after 90 or 120 minutes, and wait for it to cool naturally to 5°C or 15°C or 20°C or 24°C or 28°C;

[0046] 4. acid reaction, the particle obtained is placed in the reaction tank, injects the phosphoric acid (H 3 PO 4 ) Soak raw materials, raw materials: phosphoric acid (H 3 PO 4 ) with a mass volume ratio of 1:0.8, ...

Embodiment 3

[0053] A kind of preparation method of the defluoridation filter material based on natural mineral, its steps are:

[0054] 1. Raw material selection, using natural calcium and magnesium minerals dolomite;

[0055] 2. Crushing, crushing the raw materials in step 1 and sieving to obtain particles with a size of about 1.5mm or 1.8mm or 2.0mm;

[0056] 3. Calcination, put the material obtained in step 2 into a furnace (electric furnace or muffle furnace) for calcination to ensure that the raw materials in the furnace are heated evenly at 300°C or 310°C or 330°C or 350°C or 400°C or 420°C, at normal pressure Under the closed condition of 0.1MPa, take out the material after holding the heat for 80 or 100 minutes, and wait for it to cool naturally to 25°C or 29°C or 32°C;

[0057] 4. acid reaction, the particle obtained is placed in the reaction tank, injects the phosphoric acid (H 3 PO 4 ) Soak raw materials, raw materials: phosphoric acid (H 3 PO 4 ) with a mass volume ratio ...

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Abstract

The invention discloses a preparation and regeneration method of a water treatment defluoridation material. The method comprises the following steps of: A, selecting raw materials: selecting natural calcium and magnesium minerals as the raw materials; B, crushing and sieving the raw materials; C, not calcining or calcining particles in a furnace; D, closing a heating device, cooling and taking the raw materials; E, placing the calcined raw materials into a container or directly placing the non-calcined raw materials into the container after the process B, adding phosphoric acid or a mixed solution of phosphoric acid and calcium hydrophosphate to soak the raw materials, and removing acid liquor after the treatment is completed; F, soaking the raw materials by using sodium hydroxide or a potassium hydroxide solution, cleaning by using clear water after the solution is removed, and drying to obtain a defluoridation filter material; and G, regenerating the saturated filter material by using sodium hydroxide or white alum. The preparation and regeneration method of the water treatment defluoridation material, provided by the invention, has the advantages of low cost, simple production cost, wide application range of the filter material about water quality and pH, convenience for use, large absorption capacity and free secondary pollution; furthermore, the water treatment cost is reduced greatly, and the treated water is good in taste, stable in water quality and high in safety, and can be regenerated for many times.

Description

technical field [0001] The invention relates to the technical field of water treatment, more specifically to a preparation method of a water treatment defluorination filter material using natural ore as a raw material, and also relates to a regeneration method of a water treatment defluorination filter material. technical background [0002] As a trace element necessary for the life activities of the body, fluorine has various physiological functions, and an appropriate amount of fluorine (0.5mg-1.0mg / L) is essential for maintaining the development of bones and teeth. However, if you drink water with excessive fluoride for a long time, it will affect the calcium and phosphorus metabolism of the human body, and make the material metabolism and physiological functions of the human body disordered, causing dental fluorosis in mild cases, and bone fluorosis in severe cases, resulting in osteoporosis, Bone deformation, even paralysis, loss of working ability. China is one of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/04B01J20/30B01J20/34C02F1/28C02F101/14
Inventor 朱迟李腾
Owner 徐彬清
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