A kind of novel sludge coal-water slurry and preparation method thereof

A technology for sludge water and sludge, which is applied in the field of new sludge coal water slurry and its preparation, can solve the problems of low concentration of finished coal water slurry sludge and coal slurry, save chemical raw materials, and solve the problem of less addition or concentration The effect of too low and cost reduction

Active Publication Date: 2016-01-20
CHINA COAL RES INST CCRI ENERGY SAVING TECH CO LTD
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  • Application Information

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Problems solved by technology

Chinese patent document CN1594514A discloses "sludge coal-water slurry and its manufacturing process", and there are problems that the preparation process requires finished coal-water slurry and the concentration of sludge coal slurry is too low

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  • A kind of novel sludge coal-water slurry and preparation method thereof

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Embodiment 1

[0026] Embodiment 1, prepare sludge coal-water slurry

[0027] The preparation flow chart is as figure 1 shown.

[0028] The raw materials used in this embodiment are as follows:

[0029] Raw coal for pulping is bituminous coal with a total water content of 6%; the sludge used is sludge from a sewage treatment plant in Shenzhen with a water content of 70%; the modifier is black liquor discharged from a paper mill in Henan, and the additive is Sodium lignosulfonate. The specific process of pulping is as follows:

[0030] (1) Send the sludge and black liquor into the sludge mixing tank at a mass ratio of 7:3 to obtain a mixture, add twice the amount of water to the mixture, and stir the mixture for 10 minutes at a stirring speed of 1000 rpm. The sludge and modifier are fully mixed to obtain a mixed solution.

[0031] (2) Send the mixed solution in step (1) into a homogenizer, and modify the mixture at a pressure of 40 MPa to obtain a modified sludge with low viscosity and g...

Embodiment 2

[0036] Embodiment 2, prepare sludge coal-water slurry

[0037] The preparation flow chart is as figure 1 shown.

[0038] The raw materials used in this embodiment are as follows:

[0039] Raw coal for pulping is anthracite, with a total water content of 10.5%; the sludge used is sludge from a sewage treatment plant in Hebei, with a water content of 80%; modifiers are sodium hydroxide and hydrogen peroxide, and additives are modified wood Sodium Sulfonate. The specific process of pulping is as follows:

[0040] (1) Send sludge, sodium hydroxide, and hydrogen peroxide into the sludge mixing tank at a mass ratio of 100:1:0.1 to obtain a mixture, add twice the amount of water to the mixture, and stir the mixture at a stirring speed of 1000 rpm After 10 minutes, the sludge and the modifier are fully mixed to obtain a mixed solution.

[0041] (2) Send the mixed solution in step (1) into a homogenizer, and modify the mixture at a pressure of 50 MPa to obtain a modified sludge wi...

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Abstract

The invention discloses novel sludge coal-water slurry and a preparation method thereof. The method comprises the following steps: (1) mixing civil sludge and a sludge modifier to obtain a mixture, and adding water into the mixture to obtain mixed liquor, wherein the mass of the mixed liquor is twice that of the mixture; (2) inputting the mixed liquor into a fluid shock wave treatment device, and performing high-pressure treatment to obtain modified sludge; (3) crushing raw material coal into coal dust with particle sizes of smaller than 3mm, delivering the coal dust and the modified sludge to a grinding machine, adding a dispersing agent, and grinding to obtain the sludge coal-water slurry. According to the novel sludge coal-water slurry and the preparation method thereof, alkaline papermaking black liquid is used for modifying the sludge, and in other words, waste is treated by waste, and alkaline substances in the black liquid are fully utilized, so that a chemical raw material serving as a modifying agent is saved; in addition, lignin in the black liquid can be used as a water-coal slurry additive, and can partially or completely replace the water-coal slurry additive, so that the cost of a pulping additive is lowered.

Description

technical field [0001] The invention relates to a novel sludge coal-water slurry and a preparation method thereof. Background technique [0002] With the rapid advancement of urbanization in my country, the amount of municipal sludge is increasing. According to statistics, it has reached more than 30 million tons per year. Due to the large number of urban industrial parks, domestic sewage treatment plants often mix industrial wastewater, resulting in high heavy metal content in sludge. At present, landfill is the main treatment method for sludge in China, which not only occupies land, pollutes the environment, but also has high disposal costs. The reduction of incineration is obvious, and it is one of the directions of sludge treatment in the world. However, since the moisture content of the sludge is as high as about 80%, its calorific value is low, about 6-10MJ / kg, so it usually cannot be directly burned. It is one of the sludge treatment directions supported by the st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L1/32
Inventor 王国房李发林王燕芳赵力明孙海勇蔡洪涛梁兴苏鑫刘烨炜徐明磊颜淑娟莫日根温泉杜丽伟张桂玲张静
Owner CHINA COAL RES INST CCRI ENERGY SAVING TECH CO LTD
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