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High efficiency composite coagulant

A coagulant and high-efficiency technology, applied in the field of water treatment, can solve the problems of reducing sludge output, slow floc speed, poor removal effect, etc., and achieve the goal of increasing floc production, fast reaction speed and fast sedimentation speed Effect

Inactive Publication Date: 2013-01-30
GUANGDONG HLDG +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to use the new high-efficiency composite coagulant prepared by the present invention on the basis of the current conventional technology to carry out enhanced coagulation, which can make up for the slow speed of conventional coagulants to generate flocs, the flocs produced are small, and the sinking speed is low , high turbidity of water after sinking and poor removal of organic matter, algae, chroma and other pollutants. At the same time, it can reduce the dosage of coagulant and reduce the output of sludge. In order to solve the problem of micro-polluted water source water treatment Provide a cost-effective solution to the problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] According to the ratio of 92% of polyaluminum chloride, 2% of potassium permanganate, and 6% of auxiliary coagulant, a high-efficiency composite coagulant is compounded. Wherein the auxiliary coagulant component is ferric chloride. The prepared coagulant was formulated into a 10% solution, and 16.3 mg / L of high-efficiency composite coagulant was added to carry out mixed reaction and precipitation in the water of the Guangzhou section of the Pearl River. After 10 minutes of reaction and 10 minutes of precipitation, the removal rate of TOC in the effluent reached 25 -30%, which is 10-15% higher than that of polyaluminum chloride alone, and is equivalent to the TOC removal rate of polyaluminum chloride and potassium permanganate binary compound coagulant, but the size and settling speed of flocs are both 2 times that of the binary compound coagulant. The effluent can be drunk after being filtered and sterilized.

Embodiment 2

[0025] According to the ratio of 95% of polyaluminum chloride, 2% of potassium permanganate, and 3% of auxiliary coagulant, the high-efficiency composite coagulant is compounded. Wherein the auxiliary coagulant component is iron oxyhydroxide. The prepared coagulant was formulated into a 10% solution, and 15.8 mg / L high-efficiency composite coagulant was added to carry out mixed reaction and precipitation in the water of the Guangzhou section of the Pearl River. After 10 minutes of reaction and 10 minutes of precipitation, the removal rate of TOC in the effluent reached 45%. , which is 35% higher than that of single-dosing polyaluminum chloride, and the same dosage of polyaluminum chloride and potassium permanganate binary compound coagulant (the mass ratio of polyaluminum chloride and potassium permanganate is 95:2) compared with the TOC removal rate increased by 20%. Similarly, the floc size and settling speed are twice that of the binary compound coagulant. The effluent can...

Embodiment 3

[0027] According to the ratio of 95% of polyaluminum chloride, 2% of potassium permanganate, and 3% of auxiliary coagulant, the high-efficiency composite coagulant is compounded. Wherein the auxiliary coagulant component is hydrated manganese dioxide. The prepared coagulant was formulated into a 10% solution, and 15.8 mg / L high-efficiency composite coagulant was added to carry out mixed reaction and precipitation in the water of the Guangzhou section of the Pearl River. After 10 minutes of reaction and 10 minutes of precipitation, the removal rate of TOC in the effluent reached 45 %, which is 35% higher than the same dosage of polyaluminum chloride, and the same dosage of polyaluminum chloride and potassium permanganate binary compound coagulant (polyaluminum chloride and potassium permanganate The mass ratio of dosing is 95:2) compared with the TOC removal rate increased by 20%. Similarly, the size and settling speed of the flocs are twice that of the binary compound coagulan...

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Abstract

Belonging to the field of water treatment, the invention relates to a high efficiency composite coagulant for water treatment. The composite coagulant consists of the following materials by mass: 90-99% of an aluminum salt coagulant, 0.1-10% of permanganate, and 0.5-8% of an auxiliary agent. Potassium permanganate, an aluminum salt flocculant and an auxiliary flocculating agent are compounded in certain proportion to obtain a high efficiency water treatment flocculant. The auxiliary flocculating agent is utilized to improve the oxidation ability and reaction speed of potassium permanganate, strengthen the flocculation aiding effect, and improve the reaction efficiency and speed of ordinary inorganic flocculants. Through optimization of the proportion of the potassium permanganate, the aluminum salt flocculant and the auxiliary flocculating agent, on the one hand, the flocculation aiding capacity of the potassium permanganate and the auxiliary flocculating agent can be exerted to the utmost, thus enhancing the efficiency of removing organic pollutants, algae and turbidity by the coagulant, eliminating the precursors of disinfection by-products in water, improving the water quality and saving reagents; and on the other hand, the residual problem of potassium permanganate can be solved.

Description

technical field [0001] The invention belongs to the field of water treatment and relates to a high-efficiency composite coagulant for water treatment. Background technique [0002] Due to the serious pollution of surface water sources in recent years, organic matter, algae and other pollutants in surface water have made conventional coagulation and sedimentation treatment ineffective. Many surface waters have problems with difficult coagulation, which is mainly manifested in the fact that suspended particles in the water are not easy to destabilize. For example, conventional coagulants such as aluminum sulfate and polyaluminum are used to treat the formation of flocs at a slow speed, and the flocs produced are small and have low settling speed. High water turbidity. In addition, conventional coagulants are not effective in removing pollutants such as organic matter, algae, and chroma, and it is difficult to ensure that the water quality after treatment reaches the standard....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 刘伟熊亚张再利王开演孙国胜尹大强苏蕾
Owner GUANGDONG HLDG
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