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Modified tempering method in sludge treatment process and application thereof

A sludge treatment and sludge technology, applied in dehydration/drying/thickened sludge treatment, sustainable waste treatment, solid waste management, etc., can solve problems such as drying cracks and surface cracking of bricks

Active Publication Date: 2007-08-08
SWISON CREATIVE ENVIRONMENTAL SOLUTIONS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This brings about a problem. The surface layer of the drier adobe will shrink, while the inside of the wetter adobe will not shrink. If the percentage of the difference in size between them exceeds the elastic coefficient of the mud, that is, 1%-2%, then The surface layer of the adobe will inevitably be cracked, resulting in dry cracks

Method used

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  • Modified tempering method in sludge treatment process and application thereof

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Embodiment 1

[0014] As shown in Figure 1, the sludge with a water content of 80% is mixed with pyrite, wherein the mixed pyrite accounts for 10% of the total weight, and then the mixture is sent into the mixer, and the mixer adopts a double-shaft roller type mixer, add dry sludge with a moisture content of 5% while stirring, and temper the sludge to a sludge with a moisture content of 30.9%. After obtaining 30.9% sludge, part of the sludge is dried to obtain a moisture content of 5%. % of the sludge is returned to the stirring and conditioning stage. The remaining 30.9% of the sludge is discharged for further treatment, such as brick making and other comprehensive utilization processes.

Embodiment 2

[0016] Add pyrite into sludge with a moisture content of 75%, wherein the mixed pyrite accounts for 40% of the total weight, and add dry mud with a moisture content of 7% while stirring, and temper the sludge to a moisture content of It is 35.0% sludge. After obtaining 35.0% sludge, part of the sludge is dried to obtain sludge with a moisture content of 7%, and then returns to the stirring and tempering stage. The remaining 35.0% of the sludge is discharged for further treatment, such as brick making and other comprehensive utilization processes.

Embodiment 3

[0018] Mix the fly ash into the sludge with a water content of 70%, wherein the mixed fly ash accounts for 2% of the total weight, and then send the mixture into the mixer. The mixer adopts a double-shaft counter-rolling mixer. Add dry sludge with a moisture content of 8%, and temper the sludge to a sludge with a moisture content of 32.3%. After obtaining 32.3% sludge, part of the sludge is dried to obtain dry sludge with a moisture content of 8%, and then return Stirring and tempering phase. The remaining 32.3% of the sludge is discharged for further treatment, such as brick making and other comprehensive utilization processes.

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Abstract

The invention discloses a modifying tempering method in the sludge disposing course, which comprises the following steps: doping 1-50% pyrite or coal ash into sludge with water content at 70-80%; transmitting the mixture into stirrer; adding dried sludge with water content at 5-8%; adjusting the water content of sludge at 30-35%; drying the sludge; discharging.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a modification and tempering method in the sludge treatment process and its application. Background technique [0002] The treatment of urban sewage has been built and put into operation in various cities across the country, which has played a positive role in preventing water pollution in our country. However, the sludge formed in the process of sewage treatment has brought environmental pollution. Therefore, in terms of environmental protection, it is important to The treatment of municipal sludge has become an urgent problem to be solved. At present, the sludge disposal methods mainly include land use, landfill, incineration, biochemical treatment and dumping into the sea. However, the sludge produced in the sewage treatment process has a high moisture content and a large volume, which brings great inconvenience to its transportation, final disposal and utilization. Therefore,...

Claims

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Application Information

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IPC IPC(8): C02F11/14C04B18/30
CPCY02W30/91
Inventor 钟环声李雷杨海英李观尚吴嘉聪韦丽群
Owner SWISON CREATIVE ENVIRONMENTAL SOLUTIONS CO LTD
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