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Preparation method of energy saving type low-sulfur low-ash environment-friendly coal water slurry

An environment-friendly water and energy-saving technology, applied in the petroleum industry, liquid carbon-containing fuels, fuels, etc., can solve the problems that affect the application and promotion of coal-water slurry, the proportion of ordinary coal is not high, and there are not many high-quality coal resources, so as to improve The effect of desulfurization and ash reduction, broadening the source of raw materials, and realizing the effect of saving energy and reducing consumption

Active Publication Date: 2016-03-23
ENERGY RES INST OF JIANGXI ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent Publication No. CN104194849A proposes a process for preparing coal-water slurry by blending high-quality coal and ordinary coal, but it is limited to environmental protection requirements. Coal water slurry application promotion

Method used

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Examples

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Effect test

preparation example Construction

[0011] A method for preparing an energy-saving, low-sulfur, low-ash, environmentally friendly coal-water slurry, comprising the following steps:

[0012] 1. Pre-mix and grind common coal with a certain amount of water, dispersant, and flotation agent with a certain amount of water, dispersant, and flotation agent. The sulfur content of the coal material is ≤2%, and the ash content is ≤30. %, the usage ratio is 60% to 100%;

[0013] 2. The primary coal slurry obtained from the pre-mixed grinding is introduced into the coal slurry cleaning treatment system, and the sulfur and ash in the coal are removed through the enhanced dense medium separation and flotation process, and then filtered by the screen and then flowed into the buffer tank, and Conduct sulfur and ash quality monitoring, qualified primary coal slurry enters the next section, and unqualified coal slurry re-enters the pre-grinding and coal slurry cleaning section;

[0014] 3. Add desulfurizer, stabilizer, etc. to th...

Embodiment 1

[0016] Take a coal sample with a total sulfur content of 1.16% and an ash content of 16.14%, and put it into a ball mill for mixing with a certain amount of water, dispersant, and flotation agent to obtain a primary coal slurry with a moisture content of 32%. After enhanced dense medium separation and flotation process, and filtered through a 0.3mm screen, the sulfur content in the dry base of the obtained coal slurry was detected to be 0.26%, and the ash content was 6.75%. Then add a desulfurizer and a stabilizer to the coal slurry, adjust the concentration of the coal-water slurry to a coal content of 67%, and shear and mature to obtain an environmentally friendly coal-water slurry product. Finally, the sulfur content in the test CWS product is 0.18%, and the ash content is 4.71%.

Embodiment 2

[0018] Take a coal sample with a total sulfur content of 0.85% and an ash content of 23.79%, and put it into a ball mill for mixing with a certain amount of water, dispersant, and flotation agent to obtain a primary coal slurry with a moisture content of 33%. After enhanced dense medium separation and flotation process, and filtered through a 0.3mm sieve, the sulfur content in the dry base of the obtained coal slurry was detected to be 0.20%, and the ash content was 8.77%. Then add a desulfurizer and a stabilizer to the coal slurry, adjust the concentration of the coal-water slurry to a coal content of 66%, and shear and mature to obtain an environmentally friendly coal-water slurry product. Finally, the sulfur content in the test CWS product is 0.14%, and the ash content is 5.87%.

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Abstract

Belonging to the field of clean utilization of coal resources and energy saving and environmental protection, the invention relates to a preparation method of an energy saving type low-sulfur low-ash environment-friendly coal water slurry. The method includes: subjecting a coal material with a total sulfur content of less than or equal to 2% and an ash content of less than or equal to 30% to wet premixing grinding with a certain amount of water, a dispersing agent and a flotation reagent, with the coal material accounting for 60%-100%; then subjecting the primary coal slurry obtained by premixing grinding to desulfurization and deashing treatment by a coal slurry cleaning system, and adding a desulfurization agent, a stabilizer and the like into the qualified primary coal slurry to further perform online monitoring and adjustment on the coal water slurry concentration, and carrying out homogenizing and curing, thus obtaining the environment-friendly coal water slurry product. The method provided by the invention can directly use the coal material with high sulfur and ash content to prepare the environment-friendly coal water slurry product, broadens the sources of coal water slurry raw materials, saves the cost of the coal water slurry raw materials, realizes "green" fusion of the coal water slurry preparation process and coal washing, solves the treatment problem of coal dressing sewage and coal slime in coal washing industry, and realizes energy saving and consumption reduction in the complete process of clean utilization of coal.

Description

Technical field: [0001] The invention relates to a method for preparing an energy-saving, low-sulfur, low-ash, and environment-friendly coal-water slurry, which belongs to the fields of clean utilization of coal resources, energy conservation, and environment protection. Background technique: [0002] my country is the world's largest coal producer and consumer, and coal accounts for more than 60% of my country's primary energy consumption. With the growth of my country's energy consumption demand, the use of coal is increasing, and the large amount of pollutants emitted by coal combustion is the main cause of my country's air pollution. According to relevant statistics, 85% of my country's sulfur dioxide emissions come from coal combustion, and the area of ​​acid rain accounts for about 40% of the country's land area. In addition, dust emissions from coal combustion are one of the main causes of smog, seriously endangering the ecological environment and public health. Cle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32
CPCC10L1/326
Inventor 艾仙斌范敏李晓晖熊继海石金明席细平谢运生饶辉
Owner ENERGY RES INST OF JIANGXI ACAD OF SCI
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