Sludge dewatering process combining physical and chemical methods

A chemical method and sludge dewatering technology, applied in the direction of dewatering/drying/concentrating sludge treatment, etc., can solve the problems of low efficiency, large investment and high operating cost, and achieve excellent technical effect, firm structure and good modification effect. Effect

Active Publication Date: 2011-07-20
浙江旺能生态科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the technical problems of sludge drying and dewatering machinery products in the prior art, such as large investment, low efficiency, and high operating cost, and provide a sludge modification machine with high efficiency, low investment, and low operating cost.

Method used

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  • Sludge dewatering process combining physical and chemical methods
  • Sludge dewatering process combining physical and chemical methods
  • Sludge dewatering process combining physical and chemical methods

Examples

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Effect test

Embodiment 1

[0045] Example 1: Such as figure 1 , 2 As shown, a sludge reformer includes a cylindrical tank body 1, the tank body includes a mud inlet 11 and a discharge port 12, a rotating shaft 2 is also arranged in the tank body 1, and the rotating shaft 2 is bearing Undertaken in the tank body 1, the rotating shaft 2 is fixed with a stirring screw 3 through the support rod 4. The stirring screw 3 is in the shape of a spiral ribbon, that is, the stirring screw 3 is in the shape of a ribbon, and the end of the stirring screw 3 is along the support rod. The length direction of the screw is fixed on the support rod, and the two belt surfaces of the stirring screw 3 are the working surfaces. Stirring screw 3 comprises inner stirring screw 31 and outer stirring screw 32, and the helical radius of inner stirring screw 31 is 500mm, and the helical radius of outer stirring screw 32 is 700mm. Outer stirring screw rod 32 comprises two groups, and their ends are aligned axially but do not touc...

Embodiment 2

[0048] Embodiment 2: Different from Example 1, the dehydration aid used is the composition of talcum powder and mica equal in weight ratio, water and talcum powder are by 1.5:1, water and mica 2.5:1, and its add-on is 0.11% of sludge weight. Finally, a sludge cake with a moisture content of 37% was obtained.

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Abstract

The invention relates to a sludge dewatering process combining physical and chemical methods, in particular to a sludge treatment process which combines physical and chemical methods to achieve a higher dewatering rate. The process comprises the following steps: 1) delivering primary sludge into a sludge modifying machine; 2) adding a dewatering assistant into the sludge modifying machine, and stirring for 5-10 minutes; 3) adding a second dewatering assistant into the sludge modifying machine, and continuing to stir for 5-10 minutes; 4) discharging the sludge from the sludge modifying machine to obtain modified sludge; and 5) mechanically dewatering the modified sludge to obtain sludge cakes of which the water content is not higher than 40%. When being used for treating sludge, the invention has the advantages of high efficiency, low investment and low operating cost.

Description

technical field [0001] The invention relates to a sludge dehydration process of a comprehensive physical and chemical method for sludge drying. Background technique [0002] Sludge refers to the end product waste of sewage treatment plants, that is, domestic sludge, and the end product waste of printing and dyeing, papermaking, electroplating, smelting, machinery, oil refining, brewing, chemical pharmaceuticals and other industries is collectively referred to as industrial sludge. The sludge from rivers, lakes and ponds is collectively referred to as river sludge. With the development of the national economy and the continuous improvement of people's lives, the amount of sludge discharge is increasing. With the increasingly stringent requirements of human beings for environmental protection, correct, scientific and rational disposal of sludge has become a subject before us. [0003] At present, the water content of various sludge discharges is about 98%. my country's gene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14
Inventor 许瑞林沈威如
Owner 浙江旺能生态科技有限公司
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