Sludge dewatering composite flocculant

A composite flocculant, sludge dewatering technology, applied in the direction of dewatering/drying/concentrating sludge treatment, etc., can solve the problems of high price, high toxicity and sludge dewatering effect of CPAM, so as to improve dewatering efficiency and reduce dewatering. Costs, the effect of saving operating costs

Inactive Publication Date: 2009-01-21
四川省水处理及资源化工程技术研究中心
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AI Technical Summary

Problems solved by technology

At present, the sludge dewatering agent commonly used in sewage plants is CPAM (cationic polyacrylamide). However, due to the long-chain adsorption and bridging of CPAM, it is easy to form lumps and wrap a certain amount of water, which affects the subsequent dehydration of sludge, and CPAM is expensive. The body is highly toxic, so there is a need for a product that can effectively improve dehydration efficiency and reduce dehydration costs to replace the existing sludge dewatering flocculant

Method used

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  • Sludge dewatering composite flocculant

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with specific embodiment:

[0029] preferred embodiment

[0030] Sludge dewatering composite flocculant, including the following components: polyaluminum ferric chloride and cationic polyacrylamide, wherein the chemical general formula of polyaluminum ferric chloride is [Al 2 (OH) n Cl 6-n ] m , [Fe 2 (OH) n Cl 6 -n ] m , where n<5, m<10; and the content of polyaluminum ferric chloride and cationic polyacrylamide is polyaluminum ferric chloride: cationic polyacrylamide=2:1~5:1.

[0031] The content of the polyaluminum ferric chloride and cationic polyacrylamide can be polyaluminum ferric chloride: cationic polyacrylamide=3:1˜4:1.

[0032] The sludge dewatering composite flocculant of the present invention can be obtained through the following process methods:

[0033] 1. Prepare raw materials: calcium aluminate powder, hydrochloric acid, FeCl 3 ·6H 2 O or FeSO 4 ·7H 2 O, CPAM;

[0034] 2...

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Abstract

The invention relates to a sludge dewatering composite flocculating agent, in particular to an inorganic-organic composite flocculating agent capable of effectively improving dewatering efficiency and reducing dewatering cost. In order to realize the goal, the invention adopts the following technical proposal that the sludge dewatering composite flocculating agent comprises the compositions of polymeric aluminum ferric chloride and cationic polyacrylamide, wherein the chemical general formula of polymeric aluminum ferric chloride is [Al2 (OH)n Cl6-n]m , [Fe 2(OH)n Cl6-n] m; moreover, n is less than 5, and m is less than 10; and the content ratio of the polymeric aluminum ferric chloride to the cationic polyacrylamide is between 2 to 1 and 5 to 1. The sludge dewatering composite flocculating agent is mainly used in sludge dewatering.

Description

technical field [0001] The invention relates to an inorganic-organic composite flocculant, in particular to a composite flocculant applied to sludge dewatering. Background technique [0002] During the treatment of industrial wastewater and domestic sewage, a large amount of sludge will be produced. The moisture content in the sludge reaches 95% to 99%. As long as the moisture is removed, the volume of the sludge will be greatly reduced for further treatment. However, because the sludge particles have a certain charge, the dehydration performance is very poor, and chemical conditioning is usually used. Method, add dehydration flocculant to make chemical reaction on the surface of sludge colloidal particles, neutralize the charge carried by sludge colloidal particles, promote sludge particles to agglomerate into larger particle flocs, and at the same time make water flow from sludge particles Separated from the water to strengthen the dehydration effect. The cost of floccul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14
Inventor 蒋文举张进李洪王小川邓相玉赵绍燕何继辉
Owner 四川省水处理及资源化工程技术研究中心
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