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High-effective defluorination purification method for drinking water

A drinking water, high-efficiency technology, applied in the field of water treatment, can solve the problems of difficulty in widespread promotion, residual phosphorus and aluminum, and low efficiency, and achieve the effects of convenient use, low cost, and convenient regeneration

Inactive Publication Date: 2007-09-26
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Calcium phosphate precipitation and aluminum salt coagulation are not efficient, and a large amount of phosphorus and aluminum will remain after treatment, causing people to worry about health
There are also some methods such as reverse osmosis and electrodialysis, which are difficult to be widely promoted because of their complicated process, cumbersome operation and high cost.

Method used

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  • High-effective defluorination purification method for drinking water
  • High-effective defluorination purification method for drinking water

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] Pump groundwater containing 9 mg / L fluorine from the raw water tank 1 to the adsorption filter column 2, the raw water stays in the adsorption filter column 2 for 13 minutes, turn on the adjustable DC power supply 5, start the external electric field, and perform enhanced fluoride removal and filtration The outlet water is collected by the outlet water tank 3. After testing, the fluorine concentration of the water sample in the outlet water tank 3 is 0.72 mg / L, and other indicators all meet the standards of CJ / T206-2005 and GB5749-1985.

example 2

[0022] Pump groundwater containing 2 mg / L fluorine from the raw water tank 1 to the adsorption filter column 2, the raw water stays in the adsorption filter column 2 for 10 minutes, and the adjustable DC power supply 5 is not turned on, and the filtered water is collected by the outlet water tank 3. The test shows that the fluorine concentration of the water sample in the outlet water tank 3 is 0.78mg / L, and other indicators all meet the standards of CJ / T206-2005 and GB5749-1985.

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Abstract

The invention discloses a purifying method of removing overproof fluorine of groundwater or surface water in drinking water disposal technical domain, which comprises the following steps: filling modified pure water into adsorb filtering column with grandular activated carbon; forming modified activated char filtrated layer; setting filtrated layer in electric field; leading raw water through this filtrated layer; defluorinationing; purifying. The density of water outlet fluorine <1.0mg / L and all the other index point reach national drinking water standard.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method for removing fluorine and purifying the drinking water by using underground water or surface water containing excessive fluorine as the source of drinking water. Background technique [0002] Industrial and mining enterprises and geological activities have caused the fluorine content of surface water and groundwater to exceed the standard. The lack and excess of fluorine in drinking water will cause harm to human health, and the harm of drinking water with high fluorine to human body is more serious and common. According to the survey of nearly 29,000 water samples of drinking water in the country by the Central Patriotic Health Campaign Committee from 1983 to 1988, about 77 million people drink high-fluorine water. Most of the groundwater in high-fluoride areas has a fluoride content of 2-4mg / L, some 5-10mg / L, and the highest can reach more than 30m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/48
Inventor 刘志生梁恒俞文正陈杰
Owner HARBIN INST OF TECH
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