Multi-element composite flocculant for treating printing and dying wastewater and textile wastewater and preparing method thereof

A multi-component composite and flocculant technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of difficulty in universal application, high treatment cost, slow flocculation and sedimentation speed, etc., and achieve broad industrialization prospects and market value, COD High removal rate and wide pH application range

Active Publication Date: 2013-12-04
广州市豫泉净水材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, inorganic flocculants, such as aluminum sulfate, aluminum chloride, ferric sulfate, ferric chloride, etc., have the advantage of low cost, but have the disadvantages of slow flocculation and sedimentation speed and large dosage; organic flocculants are generally polymers , such as polyamine type, quaternary ammonium type, polyacrylamide type, etc., which have the advantages of less dosage, less scum, and strong flocculation ability, but the treatment cost is high and it has certain toxicity, so the application field is limited; Flocculants are generally composed of microorganisms (such as bacteria, actinomycetes
mold and yeast, etc.), but its fermentation production generally has disadvantages such as high raw material cost, long fermentation cycle, low flocculation activity, and the flocculation effect is limited by the type of microorganisms, so it is difficult to be universal

Method used

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  • Multi-element composite flocculant for treating printing and dying wastewater and textile wastewater and preparing method thereof
  • Multi-element composite flocculant for treating printing and dying wastewater and textile wastewater and preparing method thereof
  • Multi-element composite flocculant for treating printing and dying wastewater and textile wastewater and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0034] Preparation Example 1: Preparation of Polyaluminum Calcium Chloride

[0035] Weigh 150 g of alumina and 150 g of calcium carbonate and mix them uniformly, heat and react at 850 °C for 8 h, then cool to room temperature at a cooling rate of 8 °C / min to obtain an intermediate product, which is dissolved in 450 g React in hydrochloric acid with a mass concentration of 50-60% for 2 h, evaporate to dryness to obtain solid polyaluminum calcium chloride, and set aside.

preparation example 2

[0036] Preparation Example 2: Preparation of Aluminum Magnesium Titanium Polysilicate

[0037] Prepare a sodium silicate aqueous solution with a mass concentration of 4%, add sulfuric acid with a mass concentration of 40% to adjust pH=4, stir and react at room temperature for 30 min, then add aluminum chloride, magnesium sulfate and titanium chloride to the solution to make the aluminum salt The molar ratio of metal ions to silicon in , magnesium salt and titanium salt is 0.6:1. After stirring evenly, the temperature is raised to 70°C at a heating rate of 4°C / min, aged at this temperature for 2 days, and titanium is obtained after drying and solidification. Magnesium aluminum polysilicate.

preparation example 3

[0038] Preparation Example 3: Preparation of Aluminum Hydroxide Gel

[0039] Weigh 50 g of crystalline aluminum hydroxide, add 300 g of hydrochloric acid with a mass concentration of 50% by weight and 400 g of water, dissolve it at 105°C and 0.2 Mpa, react for 8 hours, cool and precipitate to obtain Aluminum hydroxide gel.

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PUM

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Abstract

The invention relates to a multi-element composite flocculant for treating printing and dying wastewater and textile wastewater and a preparing method of the multi-element composite flocculant. The flocculant comprises polymeric aluminium, titanium polysilicic acid aluminium silicate, calcium aluminate powder, aluminium hydroxide gel, konjac glucomannan phosphate, chitosan, sodium silicate and an additive, wherein the deacetylation degree of the chitosan is larger than or equal to 95%. Through appropriate selection of components and proportion, the multi-element composite flocculant has the advantages of being high in flocculation efficiency, small in dosage, wide in temperature application range and pH application range and the like. The multi-element composite flocculant can be used for treatment and purification of the printing and dying wastewater and the textile wastewater and has wide industrialized application prospects and market values.

Description

technical field [0001] The invention belongs to the technical field of printing and dyeing sewage treatment, and more specifically relates to a multi-component composite flocculant, a preparation method and an application thereof. Background technique [0002] Water resources are a necessary resource for human survival. However, the development of social economy has brought about urgent problems such as water resource shortage and water resource pollution, which seriously threaten human health and the sustainable development of the earth. As a traditional large water user, the printing and dyeing industry is one of the important sources of water pollution. Therefore, how to effectively treat and purify printing and dyeing wastewater has become a key issue faced by environmental protection and sustainable development organizations at home and abroad. [0003] Flocculation technology is one of the technologies for purification and treatment of sewage and wastewater, and the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 邢柯君
Owner 广州市豫泉净水材料有限公司
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