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Deep dehydration conditioner for sewage sludge and preparation method thereof

A technology of deep dehydration and conditioning agent, applied in the direction of dehydration/drying/concentrated sludge treatment, etc., can solve the problems of secondary pollution of dehydration conditioner, and achieve the effect of low price, wide source, strong passivation and adsorption

Inactive Publication Date: 2016-01-06
TAIZHOU FEIJIANG METAL PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly aims at the problem of secondary pollution in the existing dehydration conditioner, and proposes a sludge slurry deep dehydration conditioner with reasonable components, easy-to-obtain raw materials, low cost, non-corrosiveness and high dehydration efficiency and its preparation method
After the application of the present invention, there is no secondary pollution problem, and the discharge of waste water reaches the standard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] This embodiment is used for the dehydration of the sludge sludge deposited from municipal domestic sludge. This type of sludge contains a lot of organic matter and microorganisms. It is used as a deep dehydration conditioner for this type of sludge slurry. The components measured by mass percentage are Fly ash 50%, activated carbon powder 20%, bentonite 10%, quicklime powder 14% and polyaluminum ferric chloride 6%. The method for preparing sludge slurry deep dehydration conditioner with above-mentioned raw materials, carries out according to following steps:

[0022] (1) Mix the measured fly ash, activated carbon powder, bentonite and quicklime powder together to form a mixture;

[0023] (2) Put the measured polyaluminum ferric chloride in the container, add an equal amount of water to make a mixed solution;

[0024] (3) Throw the mixed material and the mixed liquid into the mixer and stir evenly.

Embodiment 2

[0026] This example is used for the dehydration of sludge sludge deposited from sewage in the petrochemical industry. This type of sludge has complex components and very little organic matter. The conditioner used for deep dehydration of this type of sludge slurry uses fly ash as the main raw material. The specific formulation The ratio is measured by mass percentage, including 70% fly ash, 5% activated carbon powder, 16% bentonite, 5% quicklime powder and 4% polyaluminum ferric chloride. Relevant preparation method is identical with embodiment 1.

Embodiment 3

[0028] This example is used for the dehydration of the sludge sludge deposited from the sewage of the traditional Chinese medicine factory. This type of sludge slurry is acidic and contains a large amount of organic matter. For this type of sludge slurry deep dehydration conditioner, quicklime powder and polyaluminium chloride are added. Iron content, the specific ratio is measured by mass percentage, including 30% fly ash, 10% activated carbon powder, 30% bentonite, 20% quicklime powder and 10% polyaluminum ferric chloride. Relevant preparation method is identical with embodiment 1.

[0029] Judging from the application of the above examples, the sludge slurry deep dehydration conditioner of the present invention has simple components, easy preparation, wide source of raw materials, and low cost. The most important thing is that there is no secondary pollution problem in the practical application of the present invention, and the waste water Discharge. The components of the ...

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PUM

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Abstract

The invention discloses a deep dehydration conditioner for sewage sludge. The deep dehydration conditioner comprises, by mass, 30 to 70% of fly ash, 5 to 20% of active carbon powder, 10 to 30% of bentonite, 5 to 20% of quicklime powder and 4 to 10% of polyaluminum ferric chloride. The invention also comprises a preparation method for the deep dehydration conditioner. The preparation method comprises the following steps: mixing weighed fly ash, active carbon powder, bentonite and quicklime powder together to obtain a mixture; then putting weighed polyaluminum ferric chloride into a container, adding a same amount of water and carrying out blending to prepare mixed liquor; and finally, adding the mixture and the mixed liquor into a mixer and carrying out uniform stirring. The preparation method provided by the invention has the advantages of simple components, easiness, wide sources of raw materials and low cost; and most important, the preparation method is free of secondary pollution and enables waste water to be discharged after reaching the standard.

Description

technical field [0001] The invention relates to a dewatering agent, in particular to a conditioner for deep dehydration of sludge slurry. The invention also relates to a preparation method of the sludge slurry deep dehydration conditioner. Background technique [0002] The by-product of water purification in sewage treatment plants is sludge. Because sludge is rich in a large amount of water, microorganisms, organic matter, and heavy metals, it is easy to ferment when stored in a natural environment, resulting in stench and polluting the surrounding environment. Therefore, sludge is also a pollutant that must be treated. Because the water content of sludge is about 85%, this kind of colloidal sludge is difficult to dispose of. Only by removing part of the water can we create conditions for resource utilization. Today, industrial sludge dewatering technology mainly relies on mechanical dehydration, because the sludge contains cellular water, which is difficult to discharge ...

Claims

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Application Information

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IPC IPC(8): C02F11/14
Inventor 花成巍
Owner TAIZHOU FEIJIANG METAL PROD CO LTD
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