Sludge dehydration conditioning agent and its preparation method and use method

A sludge dewatering and conditioning agent technology, applied in the field of environmental engineering, can solve the problems of being easily affected by rainfall, temperature, humidity, etc., high investment and operating costs, and dewatering effect, and achieve good dehydration effect, low cost, and avoidance. The effect of secondary pollution

Active Publication Date: 2016-02-24
LIAONING TECHNICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the deep dehydration methods of sludge at home and abroad mainly include natural drying, heat source drying, mechanical dehydration, etc. Among them, natural drying relies on infiltration and evaporation to reduce the moisture content of sludge, which occupies a large area and has a slow dehydration speed. , the moisture content of the sludge in 7 days is only reduced by about 20%. It is not only easily affected by rainfall, temperature, humidity, etc., but also has a strong smell. The treatment process of rapid evaporation of medium water, at present, the thermal energy drying equipment of sludge is mostly used as supporting facilities of waste incineration plants, and the heat energy generated by waste incineration is recycled to improve the utilization rate of heat energy. After drying, the moisture content of sludge is l

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The sludge dehydration conditioner of this embodiment is composed of carbide slag, marble slag, carbide and solidified sludge, and the components are in mass ratio, calcium carbide slag: marble slag: carbide: solidified sludge = 5:3:3:5; Among them, Ca(OH) of carbide slag 2 The grade is 62%, the particle size is ≦100 mesh; the marble slag particle size is ≦100 mesh; the carbide is crop carbide or sawdust carbide, the particle size is ≦100 mesh; the solidified sludge particle size is ≦2mm.

[0027] Calcium carbide slag contains 65% calcium oxide, 6% quartz, 2% magnesium oxide, 0.5% aluminum oxide, and 1% ferric oxide; marble slag contains 50% calcium carbonate, 50% quartz 8%, alumina 15%; the solidified sludge contains 28% organic matter, 10% quartz, 5% alumina, and 3% calcium carbonate.

[0028] The preparation method of the sludge dehydration conditioner of the present embodiment comprises the following steps:

[0029] Step 1: Carbide slag and marble slag are washed ...

Embodiment 2

[0037] The sludge dehydration conditioner of this embodiment is composed of carbide slag, marble slag, carbide and solidified sludge, and the components are in mass ratio, calcium carbide slag: marble slag: carbide: solidified sludge = 6:4:3:5; Among them, Ca(OH) of carbide slag 2The grade is 72%, the particle size is ≦100 mesh; the marble slag particle size is ≦100 mesh; the carbide is crop carbide or sawdust carbide, the particle size is ≦100 mesh; the solidified sludge particle size is ≦2mm.

[0038] Calcium carbide slag contains 75% of calcium oxide, 15% of quartz, 5% of magnesium oxide, 1% of aluminum oxide, 3% of ferric oxide; marble slag contains 70% of calcium carbonate, 70% of quartz 12%, alumina 25%; the solidified sludge contains 46% organic matter, 20% quartz, 12% alumina and 7% calcium carbonate.

[0039] The preparation method of the sludge dehydration conditioner of the present embodiment comprises the following steps:

[0040] Step 1. After the calcium carbid...

Embodiment 3

[0048] The sludge dehydration conditioner of this embodiment is composed of carbide slag, marble slag, carbide and solidified sludge, and the components are in mass ratio, calcium carbide slag: marble slag: carbide: solidified sludge = 6:4:4:6; Among them, Ca(OH) of carbide slag 2 The grade is 65%, the particle size is ≦100 mesh; the marble slag particle size is ≦100 mesh; the carbide is crop carbide or sawdust carbide, the particle size is ≦100 mesh; the solidified sludge particle size is ≦2mm.

[0049] Calcium carbide slag contains 70% of calcium oxide, 8% of quartz, 3% of magnesium oxide, 0.8% of aluminum oxide, and 2% of ferric oxide. Marble slag contains 60% of calcium carbonate, 60% of quartz 9%, alumina 19%; the solidified sludge contains 33% organic matter, 17% quartz, 8% alumina, and 4% calcium carbonate.

[0050] The preparation method of the sludge dehydration conditioner of the present embodiment comprises the following steps:

[0051] Step 1. After the calcium c...

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Abstract

The invention discloses a sludge dehydration conditioning agent and its preparation method and use method and belongs to the technical field of environment engineering. The sludge dehydration conditioning agent is obtained by mixing calcium carbide slag, marble slag, carbides and cured sludge according to a mass percentage ratio of (4-6): (2-4): (2-4): (4-6). The preparation method comprises respectively fragmenting calcium carbide slag, marble slag, carbides and cured sludge, carrying out ball milling and carrying out mixing according to a ratio to obtain a uniform mixture. The use method of the sludge dehydration conditioning agent comprises mixing sludge and the sludge dehydration conditioning agent according to a mass ratio of 1: (0.05-0.1) to obtain a uniform mixture, carrying out standing for 1 day, and carrying out dehydration treatment on the sludge mixture to obtain sludge with water content less than 50% and pH of 5-10. The sludge dehydration conditioning agent has the advantages of low cost, simple operation and obvious dehydration effects, has a wide raw material source, can be fully mixed with sludge easily, and can effectively improve a sludge combustion heat value. The sludge treated by the sludge dehydration conditioning agent can be recycled. The sludge dehydration conditioning agent realizes sludge harmlessness, quantitative reduction and recycling application.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and in particular relates to a sludge dehydration conditioner, a preparation method and a use method. Background technique [0002] At present, the methods of sludge treatment and disposal mainly include incineration, composting for agricultural use, land sanitary landfill, production of building materials, ocean treatment, etc. Among them, sludge incineration and landfill are the best ways to realize the reduction, harmlessness and resource utilization of sludge. The main disposal method is an ideal method in sludge disposal at the present stage, which can meet more and more stringent environmental requirements. Sludge incineration is the most thorough disposal method. After incineration, the volume of sludge is reduced by 85% to 95%, and the quality is reduced by 70% to 80%. Part of the sludge suitable for resource utilization; sludge landfill is a relatively mature technolog...

Claims

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Application Information

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IPC IPC(8): C02F11/14
CPCC02F11/14C02F2303/06
Inventor 王华庆张树光金佳旭
Owner LIAONING TECHNICAL UNIVERSITY
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