Poly(ferric aluminum chloride silicate), and preparation thereof and method for treating sewerage by using same

A technology of aluminum silicate chloride and polymerized silicic acid, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problem of low suspended solids removal rate

Inactive Publication Date: 2009-04-22
乔占印
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AI Technical Summary

Problems solved by technology

[0002] For the treatment of decolorization and flocculation in papermaking, printing and dyeing and pharmaceutical factories, the technologies currently used include ferrous chloride or aluminum sulfate liquid for treatment, and the most commonly used ferrous sulfate or polyaluminum chloride liquid for treatment. The removal rate of chemical oxygen demand (COD) and suspended solids (SS) is low, generally no more than 20%

Method used

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Embodiment Construction

[0004] The method for preparing polyaluminium-ferric silicate chloride of the present invention, (1) 1 ton of hydrochloric acid with a concentration of 10-30%, 0.2-0.5 tons of aluminum hydroxide powder and 0.1-0.3 tons of ferrous sulfate are placed in a reaction kettle After reacting at 60-120° C. for 1-4 hours, (2) add 50-100 kg of silicic acid dropwise, and keep the temperature constant for 2-5 hours to obtain polyaluminum ferric chloride silicate liquid.

[0005] The polyaluminum ferric silicate prepared above is used for decolorization and flocculation treatment of high turbidity papermaking, printing and dyeing or pharmaceutical wastewater, and the chromaticity removal rate is 60-80%. The method of decolorization and flocculation treatment of sewage:

[0006] First, dilute the polyaluminum silicate ferric chloride liquid with water to a concentration of 10-30%, according to the volume ratio of the sewage: the polyaluminum silicate chloride ferric oxide liquid is 1000: 1-5...

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Abstract

The invention discloses polyaluminum ferric silicate chloride, a preparation method thereof and a method for using the polyaluminum ferric silicate chloride to treat sewage. The invention aims to provide polyaluminum ferric silicate chloride which has high removal rate to the colority of the sewage, a preparation method thereof and a method for using the polyaluminum ferric silicate chloride to treat the sewage. The technical proposal of the invention is as follows: a polyaluminum ferric silicate chloride liquid is a mixed liquid of the polyaluminum silicate chloride and polyferric silicate chloride. A method for preparing the polyaluminum ferric silicate chloride liquid comprises the following steps: (1) 1 portion of hydrochloric acid with a concentration of between 10 and 30 percent reacts for 1 to 4 hours in a reaction kettle, and then 0.1 to 0.3 portion of ferrous sulfate is added to react for 1 to 4 hours, and (2) 0.05 to 0.1 portion of silicic acid is dripped to react for 2 to 5 hours at constant temperature to obtain the polyaluminum ferric silicate chloride liquid. The invention is used for sewage treatment.

Description

Technical field: [0001] The invention relates to sewage treatment, in particular to polyaluminum ferric silicate and its preparation method and its method for treating sewage. Background technique: [0002] For the treatment of decolorization and flocculation in papermaking, printing and dyeing and pharmaceutical factories, the technologies currently used include ferrous chloride or aluminum sulfate liquid for treatment, and the most commonly used ferrous sulfate or polyaluminum chloride liquid for treatment. The removal rate of chemical oxygen demand (COD) and suspended solids (SS) is relatively low, generally no more than 20%. Invention content: [0003] The purpose of the present invention is to provide a kind of polyaluminosilicate ferric chloride with high chroma removal rate to sewage, its preparation method and its method for treating sewage. The technical scheme of the present invention is a polyaluminum silicate ferric chloride solution, which is characterized in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 乔占印
Owner 乔占印
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