Fluorine capturing shaped coal fuel for stone coal and its production method

A technology of fuel and stone coal powder, which is applied in the field of combined fuel and its preparation method, can solve the problems of large differences in the types of civil stoves, large differences in fluorine content and forms, repeated or even relapsed illnesses, etc., and achieves the convenience of local materials , low raw material cost, good practical effect

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 coa

Method used

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  • Fluorine capturing shaped coal fuel for stone coal and its production method
  • Fluorine capturing shaped coal fuel for stone coal and its production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Weigh 30% of stone coal powder, 45% of anthracite powder, 18% of slaked lime, and 7% of clay, add some water, and stir evenly manually or mechanically to make honeycomb coal. 24 households with the same local conditions were selected, of which 8 households burned fluorine-fixed briquettes treated by the above method, 8 households burned unreinforced fluorine-treated briquettes, and 8 households burned untreated stone coal. Collect unburned coal and burnt slag from 8 households burning fluorine honeycomb briquettes, measure the fluorine content of each household, and calculate the fluorine fixation rate to be 85.7% (see Table 1). The fluorine content in the air of the three groups of ground furnaces was collected separately, and the average of 8 households burning solid fluorine fuel was 0.086mg / m 3 , the average of 8 households burning unreinforced fluorine briquette is 0.1835mg / m 3 , the average of 8 households burning untreated stone coal is 0.324mg / m 3 . Compared ...

Embodiment 2-17

[0050] According to the distribution ratio of each component in Table 5, weigh the cooked dolomite or lime, mix it with pulverized coal powder, clay and water in a certain proportion, stir evenly, and make lump coal. Take a part of it and pulverize it, and measure it with the above-mentioned method for measuring fluorine in the fluorine-fixed fuel; the fluorine-fixed rate of the fluorine-fixed fuel is measured by laboratory simulation.

[0051] Reality

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Abstract

The invention discloses a fluorine capturing shaped coal fuel for stone coal and its production method, wherein the fluorine capturing fuel comprises stone coal dust, anthracite duff, fluorine capturing addition agent and clay, wherein the fluorine capturing additive is burned dolomitite or burned limestone or lime, the preparation process includes mixing the cured fluorine capturing additive with anthracite duff, clay and stone coal dust based on proportion and grain diameter range, charging right amount of water, stirring homogeneously artificially or by machine. The invention realizes high fluorine capturing rate, sulfur capturing rate and dust depositing rate.

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 for stone coal 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 fo...

Claims

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Application Information

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IPC IPC(8): C10L10/00
Inventor 虞江萍冯福建雒昆利王五一
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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