Unlock instant, AI-driven research and patent intelligence for your innovation.

Sludge drying method

A sludge drying and sludge technology, applied in dehydration/drying/concentrated sludge treatment, energy wastewater treatment, etc., to achieve the effects of improving drying efficiency, good dehydration, and easy compression

Active Publication Date: 2013-08-07
HUNAN UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the current pretreatment technology, it is rarely involved in directly using the effective components of the sludge itself to condition it.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sludge drying method
  • Sludge drying method
  • Sludge drying method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A sludge drying method of the present invention, the flow process is as follows Figure 12 shown, including the following steps:

[0042] (1) Removal of impurities and homogenization: Take the sludge with a moisture content of 85% after gravity concentration and mechanical dehydration in the urban sewage treatment plant and place it in a mixer equipped with a 1cm×1cm mesh stirring head. Stir at a constant speed of 150rpm for 20 minutes, remove impurities such as coarse fibers in the sludge through the agitation of the mesh stirring head, and achieve a homogeneous effect through stirring, so that the sludge changes from a lump to a slurry;

[0043] (2) Conditioning of surface active substances: add quicklime to the sludge after removal of impurities and homogenization according to 10% of the wet weight of the sludge after removal of impurities and homogenization, stir at a constant speed of 150rpm for 15min to fully mix, and then Stand still for 4h;

[0044] (3) Build ...

Embodiment 2

[0048] A sludge drying method of the present invention, the flow process is as follows Figure 12 shown, including the following steps:

[0049] (1) Removal of impurities and homogenization: Take the sludge with a moisture content of 85% after gravity concentration and mechanical dehydration in the urban sewage treatment plant and place it in a mixer equipped with a 1cm×1cm mesh stirring head. Stir at a constant speed of 150rpm for 20 minutes, remove impurities such as coarse fibers in the sludge through the agitation of the mesh stirring head, and achieve a homogeneous effect through stirring, so that the sludge changes from a lump to a slurry;

[0050] (2) Conditioning surface active substances: Add quicklime to the sludge after removing impurities and homogenizing according to 5% of the wet weight of the sludge after removing impurities and homogenizing, stir at a constant speed of 150rpm for 15min to fully mix, and then statically Set 8h;

[0051] (3) Build the microbubb...

Embodiment 3

[0055] A sludge drying method of the present invention, the flow process is as follows Figure 12 shown, including the following steps:

[0056] (1) Removal of impurities and homogenization: Take the sludge with a moisture content of 85% after gravity concentration and mechanical dehydration in the urban sewage treatment plant and place it in a mixer equipped with a 1cm×1cm mesh stirring head. Stir at a constant speed of 150rpm for 20 minutes, remove impurities such as coarse fibers in the sludge through the agitation of the mesh stirring head, and achieve a homogeneous effect through stirring, so that the sludge changes from a lump to a slurry;

[0057] (2) Conditioning surface active substances: add protein cement foaming agent to the sludge after removing impurities and homogenizing according to 5‰ of the wet weight of sludge after removing impurities and homogenizing, and mix thoroughly;

[0058] (3) Build the microbubble skeleton: Add lignocellulose into the sludge with ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a sludge drying method which comprises the following steps: agitating the taken sludge evenly into be in slurry state and removing impurities; adding quicklime into the sludge, agitating and standing so that the surface active substances of creatures in the sludge are fully dissolved out, or adding exogenous surface active substances in the sludge and agitating; adding engineering fiber into the sludge so as to form a mesh type three-dimensional microbubble skeleton in the sludge; then carrying out high-speed agitation, or inputting the sludge into a closing device continuously for carrying out high-speed agitation and introducing compressed air so as to continuously expand the volume of the sludge until the microbubble sludge is formed; and spreading out and piling up the microbubble sludge at normal-temperature ambient, thus finally realizing the quick drying of the sludge. The method has the advantages of high drying efficiency and the like; and the product is good in dehydration property, high in heat value and easy to compress.

Description

Technical field [0001] The invention involves the field of environmental protection sludge treatment, and especially involves a method of drying sludge. Background technique [0002] In recent years, with the continuous improvement of my country's population growth and the level of urbanization, the demand for sewage in the process of urban production and living has increased.At the same time, the sedimentary substances during sewage treatment and the residue obtained from the foam from the surface of the sewage, that is, the output of "sludge" also increased sharply.The sludge ingredients are very complicated, containing a large amount of toxic and harmful substances such as pathogenic bacteria, heavy metals and organic pollutants. It is easy to cause secondary pollution to groundwater and soil.serious threat. [0003] During the processing and disposal of sludge, the moisture content has always been an important indicator for measuring the nature of the sludge.Because the sludg...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/12C02F11/14
CPCY02W10/37
Inventor 黄兢杨朝晖曾光明王慧玲笱成柳徐海音
Owner HUNAN UNIV