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

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...

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

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