Composite purifying agent for treating wastewater

A technology for wastewater treatment and water purifying agent, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., which can solve the problems of secondary pollution, narrow application range and instability.

Inactive Publication Date: 2005-10-26
曾郴林 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, other ingredients are added in the preparation process to improve the stability of the system. Using it as an aluminum salt coagulant will cause secondary pollution to the environment. Although polyferric sulfate is a treatment agent with better performance, the coagulation progress is fast. However, the chromaticity value of the treated water is relatively high. If it is left for a long time, it will produce yellow precipitate, which is unstable. Silicate ions are introduced to improve the stability. The pH range of the product needs to be controlled between 1.5-2.0 , will have a certain impact on water treatment equipment, and the scope of application is narrow

Method used

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Examples

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Effect test

Embodiment 1

[0011] Embodiment 1, the composite water purifying agent of the present invention for treating industrial printing and dyeing wastewater, the weight percentages of each component are respectively 14-15% of the polymeric basic aluminum chloride, and 10-11% of the polymeric basic ferric sulfate, Ferric chloride 9-9.5%, sodium silicate 1-1.5%, balance water to 100%.

[0012] The molecular formula of polymeric basic aluminum chloride is [Al 2 (OH)n Cl 6-n ·XH 20 ]m, where m=1-5, n=1~2, X=, polymeric basic ferric sulfate molecule is [Fe 2 (OH)n·(SO 4 ) 3-n / 2 ] m where n<2, m=f(n).

Embodiment 2

[0013] Embodiment 2, the composite water purifying agent of the present invention that is used for processing papermaking industrial waste water, each component weight percent is respectively polymerized basic aluminum chloride is 10-12%, and polymerized basic ferric sulfate is 14-15%, Ferric chloride 9.5-10%, sodium silicate 1.5-2%, and the balance water to 100%.

[0014] The molecular formula of polymeric basic aluminum chloride is [Al 2 (OH)n Cl 6-n ·XH 20 ]m where m=1-5, n=1~2, X=, polymeric basic ferric sulfate molecule is [Fe 2 (OH)n·(SO4) 3-n / 2 ] m where n<2, m=f(n).

Embodiment 3

[0015] Embodiment 3, the composite water purifying agent of the present invention that is used for processing domestic waste water, petrochemical waste water, each component weight percent is that polymeric basic aluminum chloride is 12-13%, and polymeric basic ferric sulfate is 12-13%. 13%, ferric chloride 9.0-9.5%, sodium silicate 1.3-1.8%, and the balance water to 100%.

[0016] Polymer basic aluminum chloride, the molecular formula is [Al 2 (OH)n Cl 6-n ·XH 20 ]m where m=1-5, n=1~2, X=, polymeric basic ferric sulfate molecule is [Fe 2 (OH)n·(SO4) 3-n / 2 ] m where n<2, m=f(n). The water purifying agent of this formula can also be applied to the wastewater treatment of brewing oil and meat processing.

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PUM

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Abstract

The present invention discloses a compound water-purifying agent for treating waste water. Said water-parifying agent is formed from basic aluminium polychloride, basic ferric polysulfate, ferric chloride, sodium silicate, sulfuric acid and water. Said invention can effectively remove various heavy metals from waste water, and can reduce COD and desulfurize.

Description

technical field [0001] The invention relates to a composite water purifying agent for wastewater treatment. Background technique [0002] Water is a very important material resource in human life and production activities. In recent years, with the rapid economic development and increasingly prominent environmental problems, water resources have become increasingly scarce. In the treatment of urban sewage and industrial wastewater, water purification through the reaction of water purifiers and pollutants in water has been widely used, and it is an effective and fast method. At present, the use of a single type of water purifier has been gradually eliminated, and its development and application have been gradually replaced by compound water purifiers. Most of the compound water purifiers use ferric chloride and aluminum chloride as the main components of water purifiers. , such as the "water purifier" published by the Chinese Patent Application No. 01128408.9, which is comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 曾郴林石永丰崔建平
Owner 曾郴林
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