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A kind of composite drinking water defluoridation method

A technology for drinking water and raw water, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., to achieve the effect of improving fluorine removal capacity, low turbidity, and no secondary pollution

Active Publication Date: 2016-02-17
JIANGSU YONGGUAN WATER & WASTERWATER EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to solve the problems existing in the prior art, and provide a compound drinking water defluorination method with simple method, low operating cost, stable defluorination effect, no need for regeneration of the defluorination filter material, and avoiding secondary pollution problems

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  • A kind of composite drinking water defluoridation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: If the fluorine content of the raw water is 2.6 mg / L, the treatment process is as follows:

[0017] (1) Add 70ppm of compound hydroxyaluminum phosphorous ash defluoridation agent to the water inlet;

[0018] (2) Filtrate through a filter column with a diameter of 500mm, a height of 1.5m, and a spherical hydroxyapatite filter layer with a height of 1.0m; the filtration rate of the filter column is 15m / hour;

[0019] (4) Filtrate through filter sand with a diameter of 315mm, a height of 1.2m, and a sand layer height of 0.6m;

[0020] (5) Backwash the spherical hydroxyapatite filter column and sand filter every 24 hours.

[0021] Through the above treatment, the fluorine content of the effluent is 0.8mg / L, and the turbidity is <1NTU, which meets the requirements of the corresponding indicators in the national drinking water hygiene standard.

Embodiment 2

[0022] Embodiment 2: If the fluorine content of the raw water is 5 mg / L, the treatment process is as follows:

[0023] (1) Add 150ppm aluminum-based hydroxyapatite defluoridation agent to the water inlet;

[0024] (2) Filter through a filter column with a diameter of 500mm, a height of 1.5m, and a spherical hydroxyapatite filter layer with a height of 1.0m, and the filtration rate of the filter column is 8m / hour;

[0025] (3) Filtrate through filter sand with a diameter of 315mm, a height of 1.2m, and a sand layer height of 0.7m;

[0026] (4) Backwash the spherical hydroxyapatite filter column and sand filter every 24 hours.

[0027] Through the above treatment, the fluorine content of the effluent is 0.7mg / L, and the turbidity is <1NTU, which meets the requirements of the corresponding indicators in the national drinking water hygiene standard.

Embodiment 3

[0028] Embodiment 3: If the fluorine content of the raw water is 10mg / L, the treatment process is as follows:

[0029] (5) Add 300ppm aluminum-based hydroxyapatite defluoridation agent to the water inlet;

[0030] (6) Filter through a filter column with a diameter of 500mm, a height of 2m, and a spherical hydroxyapatite filter layer with a height of 1.8m, and the filtration rate of the filter column is 5m / hour;

[0031] (7) Filter through the filter sand with a diameter of 315mm, a height of 1.2m, and a sand layer height of 0.8m;

[0032] (8) Backwash the spherical hydroxyapatite filter column and sand filter every 24 hours.

[0033] Through the above treatment, the fluorine content of the effluent is 0.8mg / L, and the turbidity is <1NTU, which meets the requirements of the corresponding indicators in the national drinking water hygiene standard.

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Abstract

The present invention disclosed a composite drinking water removal method. It adopts the method of combining with aluminum -based hydroxyl -based hydroxylholite and spherical hydroxyl -based hydroxylite.The fluorine removal capacity of hydroxylhhexylite has changed the flocculating characteristics of aluminum aluminum hydroxyl -based hydroxylhhexylhlite, which makes flocculent body condenses into small particles, easy to sink, and low turbidity after clarification;Under the influence of the flocculent body formed by the aphalite removal agent, the fluorine adsorption of spherical hydroxylhhexylite is combined with the flocculent body to remove it, and always maintains the fluorine removal function of the spherical hydroxyl -based hydroxylite.Using the inventive method of the present invention can achieve a long -term stable fluoride removal effect. The removal capacity of aluminum aluminum hydroxyl -based limestone can reach 30 mg / g.And low running costs.

Description

technical field [0001] The invention relates to a method for removing fluoride, in particular to a method for removing fluoride in compound drinking water. Background technique [0002] my country's drinking water hygiene standard (GB5749-2006) stipulates that the fluorine content in drinking water shall not exceed 1.0mg / L. Fluorosis caused by drinking high-fluoride water is an endemic disease worldwide. In mild cases, it can cause dental fluorosis, and in severe cases, it can cause skeletal fluorosis, resulting in osteoporosis, bone deformation, and even paralysis and loss of working ability. China is one of the countries with the most severe fluorosis in the world. Except for Shanghai, it spreads all over the country, mainly in rural and pastoral areas with relatively backward economy. At present, the population of sick villages due to high fluoride water poisoning is as high as 80 million. Drinking water Fluorine removal is particularly important. [0003] The current d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04
Inventor 刘泽山刘成
Owner JIANGSU YONGGUAN WATER & WASTERWATER EQUIP CO LTD
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