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Double-formulation polysilicate coagulant preparation method

A polysilicate, coagulant technology, applied in chemical instruments and methods, silicon compounds, flocculation/sedimentation water/sewage treatment, etc., can solve the problem of inability to industrialize production and application, easy gelation, effective concentration, and poor product stability. and other problems, to achieve the effect of good adsorption and bridging capacity, good coagulation effect and excellent coagulation performance.

Inactive Publication Date: 2006-07-12
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, experimental studies have used this method to prepare products with excellent coagulation properties, but the two major problems of poor product stability (ie, easy to gel) and low effective concentration have not been well resolved, so that industrial production and application cannot be carried out.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] First prepare the polyferric sulfate solution, then prepare the aluminum sulfate solution, then add 44ml polyferric sulfate and 32ml aluminum sulfate solution to the reaction vessel at room temperature, after mixing, adjust the pH value of the mixed solution to 0.5 with sulfuric acid, and then mix The solution is agent A; get 17 grams of water glass with a modulus of 3.2 and add 83 ml of tap water to form a solution containing 4.5% of silicon dioxide, which is agent B. When applying, slowly pour agent B into agent A in a certain proportion, and mix for 30 to 60 minutes to obtain the final polysilicate coagulant. The molar ratio of silicon dioxide to metal (SiO 2 / M) is 1, and the pot life is 8 to 72 hours. The coagulant can be put into the treated water (or waste water) of the coagulation device after being diluted (or undiluted).

Embodiment 2

[0019] First prepare the polyferric sulfate solution, then prepare the aluminum sulfate solution, then add 34ml polyferric sulfate and 45ml aluminum sulfate solution to the reaction vessel at room temperature, after mixing, adjust the pH value of the mixed solution to 1.0 with sulfuric acid, and then mix The solution is agent A; get 20 grams of water glass with a modulus of 3.2 and add 80 ml of tap water to form a solution containing 7% of silicon dioxide, which is agent B. When applying, slowly pour agent B into agent A in a certain proportion, and mix for 30 to 60 minutes to obtain the final polysilicate coagulant. The molar ratio of silicon dioxide to metal (SiO 2 / M) is 1.5, and the pot life is 8 to 72 hours. The coagulant can be put into the treated water (or waste water) of the coagulation device after being diluted (or undiluted).

Embodiment 3

[0021] First prepare the polyferric sulfate solution, then prepare the aluminum sulfate solution, then add 60ml polyferric sulfate and 22ml aluminum sulfate solution to the reaction vessel at room temperature, mix well, adjust the pH value of the mixed solution to 0.05 with sulfuric acid, and then mix The solution is agent A; get 25 grams of water glass with a modulus of 3.2 and add 75 ml of tap water to form a solution containing 10% of silicon dioxide, which is agent B. When applying, slowly pour agent B into agent A in a certain proportion, and mix for 30 to 60 minutes to obtain the final polysilicate coagulant. The molar ratio of silicon dioxide to metal (SiO 2 / M) is 2.3, and the pot life is 8 to 72 hours. The coagulant can be put into the treated water (or waste water) of the coagulation device after being diluted (or undiluted).

[0022] Performance Test Experiment

[0023] Test experiment 1. The results of the treatment of blue denim printing and dyeing wastewater wi...

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PUM

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Abstract

The invention discloses a making method of two-agent typed polysilicate coagulant, which comprises the following steps: diluting one or more metal salt and or polymeric metal salt solution by water to produce 5-15 percent weight density at metal elemental unit; adjusting the pH value through inorganic acid as agent A; diluting the solution with silicon material by water to produce 2-10 percent weight density at SiO2 unit as agent B; packing agent A and B separately; mixing agent A and B evenly to produce the molar rate at 1:0.5-5.0 for silica dioxide and metal; obtaining the final polysilicate coagulant. The invention can produce excellent property of polysilicate coagulant with impurity-removing and high decolouring efficiency, which forms rapid and dense floccules.

Description

technical field [0001] The invention relates to a preparation method of a coagulant, in particular to a preparation method of a two-component polysilicate coagulant. Background technique [0002] In the water supply and wastewater treatment process, the coagulation process is one of the most commonly used key links. It directly affects the operating conditions of the subsequent process, the final water quality and cost, so it has become an important research and development field for water supply engineering and environmental engineering. The performance of coagulants plays a decisive role in coagulation technology. [0003] Because of its macromolecular structure and positive charge, polysilicate coagulant has good adsorption and bridging ability like organic flocculant and charge neutralization ability like inorganic coagulant. Studies have shown that this type of coagulant has better coagulation performance than polyaluminum chloride (PAC) and polyferric sulfate (PFS), ...

Claims

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Application Information

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IPC IPC(8): C01B33/20C02F1/52
Inventor 马晓鸥尹庚明杨玉萍李柏均
Owner WUYI UNIV
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