Adsorption-flocculation precipitant and preparation method and application thereof

A precipitant and flocculation technology, which is applied in flocculation/sedimentation water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problem of low molecular weight of inorganic polymer flocculants and poor adsorption and bridging ability of colloidal particles Strong, restricting wide application and other issues, to achieve the effect of reducing the difficulty of secondary processing, shortening the processing cycle, and improving the processing effect

Active Publication Date: 2018-12-07
ZHEJIANG ZHENGJIE ENVIRONMENTAL SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the low relative molecular weight of inorganic polymer flocculants, the dosage is large, the amount of sludge produced is large, and the ability to adsorb and bridge colloidal particles in sewage is not strong, these factors restrict its use in electroplating wastewater treatment. wide application of

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  • Adsorption-flocculation precipitant and preparation method and application thereof
  • Adsorption-flocculation precipitant and preparation method and application thereof
  • Adsorption-flocculation precipitant and preparation method and application thereof

Examples

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Embodiment 1

[0031] A new type of adsorption-flocculation precipitant, which is prepared from the following raw materials by weight: polyaluminum chloride: 60 parts, lotus root powder: 60 parts, diatomaceous earth: 20 parts, cationic polyacrylamide: 5 parts.

[0032] The preparation method of the above-mentioned adsorption-flocculation precipitant specifically comprises the following steps:

[0033] (1) Preparation of polyaluminum chloride: Add aluminum hydroxide to concentrated hydrochloric acid solution under stirring conditions, heat up to 110°C for 2.5 hours, after the aluminum hydroxide is completely dissolved, cool down to 55°C, and use a mass concentration of 30% NaOH solution adjusted the pH value of the solution to 4, then raised the temperature to 110°C, and reacted for 45 minutes under stirring conditions to obtain a light yellow transparent polyaluminum chloride solution, which was dried and ground at 55°C to obtain the polyaluminum chloride product; Among them, the particle si...

Embodiment 2

[0046] A new type of adsorption-flocculation precipitant, which is prepared from the following raw materials by weight: polyaluminum chloride: 50 parts, lotus root powder: 60 parts, diatomaceous earth 30 parts, cationic polyacrylamide: 8 parts.

[0047] The preparation method of the above-mentioned adsorption-flocculation precipitant specifically comprises the following steps:

[0048] (1) Preparation of polyaluminum chloride: Add aluminum hydroxide to concentrated hydrochloric acid solution under stirring conditions, heat up to 110°C for 2.5 hours, after the aluminum hydroxide is completely dissolved, cool down to 55°C, and use a mass concentration of 30% NaOH solution adjusted the pH value of the solution to 4, then raised the temperature to 110°C, and reacted for 45 minutes under stirring conditions to obtain a light yellow transparent polyaluminum chloride solution, which was dried and ground at 55°C to obtain the polyaluminum chloride product; Among them, the particle siz...

Embodiment 3

[0061] A new type of adsorption-flocculation precipitant, which is prepared from the following raw materials by weight: polyaluminum chloride: 55 parts, lotus root powder: 45 parts, diatomaceous earth: 25 parts, and cationic polyacrylamide: 7 parts.

[0062] The preparation method of the above-mentioned adsorption-flocculation precipitant specifically comprises the following steps:

[0063] (1) Preparation of polyaluminum chloride: Add aluminum hydroxide to concentrated hydrochloric acid solution under stirring condition, raise the temperature to 110°C for 3 hours, after the aluminum hydroxide is completely dissolved, cool down to 55°C, and use a concentration of 30 % NaOH solution to adjust the pH value of the solution to 4, then raise the temperature to 110°C, and react for 50 minutes under stirring conditions to obtain a light yellow transparent polyaluminum chloride solution, dry and grind at 55°C to obtain the polyaluminum chloride product; , the particle size of polyalum...

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Abstract

The invention relates to an adsorption-flocculation precipitant and a preparation method and an application thereof. The precipitant includes, by weight, the following raw material components: 50-80 parts of poly aluminium chloride, 40-60 parts of lotus root powder, 20-30 parts of kieselguhr, and 5-10 parts of cationic-type polyacrylamide. High purity poly aluminium chloride is prepared by adopting a simple and rapid method, is utilized as an inorganic polymer flocculant part in the adsorption-flocculation precipitant, and has the advantages of good flocculation effect, large flocs and rapid sedimentation; and through addition of nontoxic natural absorbent materials such as the lotus root powder and the kieselguhr, the treatment effect on electroplating wastewater is improved, and the difficulty of secondary treatment of sludge is reduced. The novel adsorption-flocculation precipitant can simultaneously achieve dual effects of adsorption and flocculation precipitation, thereby reducingthe treatment cost of the electroplating wastewater, and a treatment cycle is shortened.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to an adsorption-flocculation precipitant and its preparation method and application. Background technique [0002] The electroplating industry is one of the three major industrial pollutions in the world today. Electroplating technology is widely used in machine manufacturing, light industry and electronics industries. At present, there are more than 10,000 electroplating factories in my country, which discharge hundreds of millions of cubic meters of electroplating wastewater every year. Electroplating wastewater contains a large amount of heavy metal ions such as chromium, nickel, lead, organic compounds and inorganic compounds and other harmful substances. If electroplating wastewater is directly discharged into the water body without treatment, it will definitely pose a huge threat to the ecological environment and human production and life. At present,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00C02F1/28C02F1/52C02F1/56C02F103/16
CPCC02F1/00C02F1/28C02F1/281C02F1/5236C02F1/56C02F2103/16
Inventor 赵丽刘倩吴盈裘伟霞毛龙飞
Owner ZHEJIANG ZHENGJIE ENVIRONMENTAL SCI & TECH CO LTD
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