Superfine coal based fluid fuel and its preparation

A fluid fuel, ultra-fine technology, used in liquid carbon-containing fuels, fuels, petroleum industries, etc., can solve problems such as high apparent viscosity, limiting pumping capacity, atomization performance and combustion effect, affecting static stability, etc.

Inactive Publication Date: 2003-11-19
北京金泓毅新技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the coarse coal powder particles of conventional slurry, its apparent viscosity is too large (generally above 1000mpa.s), which not only limits the pumping capacity, atomization performance and combustion effect, but also affects the static stability.

Method used

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  • Superfine coal based fluid fuel and its preparation
  • Superfine coal based fluid fuel and its preparation

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Coal raw materials (Lignite, long-flame coal with low degree of metamorphism, gas coal, fat coal, coking coal, lean coal, lean coal and various media between them can be selected, such as 1 / 3 coking coal, etc. ) After coal washing and magnetic separation are carried out with conventional coal washing equipment and magnetic separation equipment, the coal is ground with a grinder. Then use a classifier to classify the pulverized coal powder once. The pulverized coal particles smaller than 38 microns can directly enter the following slurrying process, and the pulverized coal particles larger than 38 microns enter the next ultrafine grinding process. The coal powder particles are ultra-finely ground with an ultra-fine mill, and the coal powder particles are classified again by a classifier. The coal powder particles smaller than 38 microns enter the next slurrying process, and the coal powder particles larger than 38 microns are returned to the ultra-fine The grinding proce...

Embodiment 2

[0026] Coal raw materials (such as fat coal) are washed and separated by conventional coal washing equipment and magnetic separation equipment, and then the coal is ground by a grinder. Then use a classifier to classify the ground coal powder once. The coal powder particles smaller than 15 microns can directly enter the following slurrying process, and the coal powder particles larger than 15 microns enter the next ultrafine grinding process. The pulverized coal particles are ultra-finely ground with an ultra-fine mill, and the pulverized coal particles are classified again by a classifier. The pulverized coal particles smaller than 15 microns enter the next process, and the pulverized coal particles larger than 15 microns return to the ultra-fine mill. The process is again ultra-fine grinding. In this way, the desired coal powder particles can be obtained.

[0027] Take 1.5 kg of dispersant and 30 kg of water, mix it evenly, and put it into the slurry tank, slowly add 70 kg ...

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Abstract

A superfine coal-base fluid fuel is prepared from coal particles (4-5 microns in average), water, disperser, stabilizer, sulfur-fixing agent and combustion promoter through preparing raw materials, grinding, classifying, superfine grinding, classifying again, preparing slurry and regulating. Its advantages are low apparent viscosity, high atomizing and combustion effect, and good stability.

Description

technical field [0001] The invention relates to an ultra-fine coal-based fluid fuel and a preparation method thereof. The fuel can replace heavy oil or oil residue in various types of oil-fired boilers, replace light diesel oil and other high-grade fuels in internal combustion engines and turbines, and even be used as a gas permeable fuel. flat fuel. Background technique [0002] Coal water slurry is a coal-based liquid oil substitute fuel, which is divided into conventional coal water slurry, fine coal water slurry and low calorific value coal water slurry. The reason why coal slurry fuel can replace oil is that its important characteristics are that it can be pumped and atomized rapidly in the furnace like oil. In order to atomize the coal slurry, the viscosity of the slurry should be low, but reducing the viscosity will definitely affect the concentration of the coal slurry. The lower the concentration, the lower the heat energy per unit volume. "High concentration, lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32
Inventor 贺来毅董平崔忠
Owner 北京金泓毅新技术有限公司
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