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Fluorine capturing fuel with enwrapped stone coal as main material and its production method

A technology for fuel and stone coal, applied in the field of combined fuel and its preparation method, can solve the problems of large differences in civil stove types, large differences in fluorine content and form, and deterioration of living environment quality, so as to increase the economic burden of farmers, The cost of raw materials is low, and the effect of easy to obtain materials on site

Inactive Publication Date: 2004-11-17
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the improvement of cooking stoves to reduce fluoride has a certain effect, there are still many problems: first, the cost of the project is huge
And there will be duplication of investment due to loss
Secondly, the project is time-consuming and protracted. Once it cannot be persisted, the condition will recur or even rebound, and the quality of the living environment will deteriorate again.
The third and most fundamental point is that the stove renovation project only discharges high-fluorine coal smoke to the outside, but fails to fundamentally reduce the emission of coal fluorine.
However, the preparation method of the above-mentioned patents is relatively simple, and there are many types of coal in coal-fired fluorosis areas in my country, with large differences in fluorine content and forms, and the types of civilian stoves used are very different. The fluorine-fixed fuel must be shaped and flammable. , so the above-mentioned patented technology has limitations in the use of civilian stoves

Method used

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  • Fluorine capturing fuel with enwrapped stone coal as main material and its production method
  • Fluorine capturing fuel with enwrapped stone coal as main material and its production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Weigh 83% of the southern Shaanxi stone coal and lay it flat on the cement floor or iron plate, evenly sprinkle 7% of anthracite powder, 6% of No. 1 slaked lime and 4% of clay on it, stir evenly, and sprinkle a small amount of water to make Anthracite coal powder, slaked lime and clay are evenly wrapped on the stone coal block and dried in the air. Select 16 local households with the same ground furnaces, of which 8 households burn the fluorine-fixed fuel treated by the above method, and 8 households burn untreated stone coal. Collect unburned coal and slag after combustion, measure the fluorine content of each household, and calculate the fluorine fixation rate to be 75.0% (see Table 1). Then collect the fluorine content of the air in the two groups of ground furnace rooms respectively, and the fluorine content of the air in the burning fluorine fuel is 0.04625±0.02878mg / m 3 , those who burn untreated stone coal 0.324±0.2591mg / m 3 , The average fluoride removal rate ...

Embodiment 2-17

[0051] Take stone coal block, anthracite powder, matured dolomite or lime and clay according to the proportion of each component in Table 5, stir evenly, sprinkle a small amount of water, make anthracite powder, matured dolomite or lime and The clay is evenly wrapped on the stone coal block and dried in the air. Take part of it and pulverize it, wherein the fluorine is measured by the above-mentioned method for measuring fluorine in fluorine-fixed fuel; part of it is measured by the above-mentioned method for measuring fluorine released by the above-mentioned fluorine-fixed fuel simulating the combustion temperature of a stone coal furnace.

[0052]

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Abstract

The invention discloses a fluorine capturing fuel with enwrapped stone coal as main material and its production method, wherein cured and burned dolomitite or burned limestone, anthracite duff and clay are mixed by a finite proportion and coated outside the stone coal, and the end product through further airing. The invention realizes high fluorine-fixing rate, sulfur-eliminating ratio and dust-depositing rate, the problem of air pollution of vast amount of fluoride and sulphide produced by stone coal combustion is solved substantially.

Description

technical field [0001] The invention relates to a combined fuel and a preparation method thereof, in particular to a combined fuel with fluorine-fixing performance and a preparation method thereof. Background technique [0002] The flue gas produced by the combustion of high-fluorine coal is the main source of air fluorine pollution. Controlled by geological strata, the fluorine content of high-fluorine coal in my country generally ranges from 100 to 300 mg / kg, with an average fluorine content of 200 mg / kg. This value is much higher than the world average of 80mg / kg. Especially in some Permian coal-measure strata and Cambrian and Silurian coal-measure strata, the fluorine content of coal is even as high as 1000-3000mg / kg. At present, there are quite a few power plants in my country that use high-fluorine coal as fuel. Therefore, in the process of coal mining, processing and utilization, fluorine in coal diffuses into the atmosphere, water and soil in the form of gaseous, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/00
Inventor 冯福建虞江萍雒昆利王五一
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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