Coal pyrolyzing system

Abstract

The invention provides a coal pyrolyzing system. The coal pyrolyzing system comprises a pre-drying unit and a pyrolyzing unit, wherein the pre-drying unit is used for pre-drying and dehydrating coal; the pyrolyzing unit is communicated with the pre-drying unit and arranged downstream the pre-drying unit. The coal pyrolyzing system adds the pre-drying unit for pre-drying and dehydrating the coal on the basis of the existing pyrolyzing unit so that pulverized coal can be completely dried into dried coal; the pyrolyzing unit pyrolyzing the dried coal can achieve high pyrolyzing efficiency and meanwhile reduce investment and operation costs of the entire coal pyrolyzing system. The coal pyrolyzing system is high in heat exchange efficiency, simple in equipment and good in economy and creates conditions for achieving coal, oil and gas poly-generation techniques.

Description

technical field [0001] The invention relates to the field of clean coal chemical industry, in particular to a coal pyrolysis system. Background technique [0002] Minced coal is a by-product that must be produced in the coal mining process, and the use of modern comprehensive coal mining equipment has also increased the output of minced coal. my country currently relies heavily on coal resources. With the gradual reduction of high-quality coal resources, the development and clean utilization of low-grade coal resources such as fine coal are gradually being emphasized. However, among the currently disclosed technologies, whether it is coal-to-oil, coal-to-natural gas, coal-to-methanol, or low-, medium-, and high-temperature coke-making technologies, the raw coal particles used are basically above 25mm. 25mm fine coal is more difficult to handle. A large amount of fine coal is piled up, which cannot produce economic benefits, and at the same time causes new environmental pro...

AI Technical Summary

Problems solved by technology

This method has limited ability to expand the heat exchange area and poor economic performance

[0008] In summary, there are certain defects in the coal pyrolysis process in the prior art. Therefore, it is urgent to improve the coal pyrolysis system in the prior art, so as to reduce the cost of the existing coal pyrolysis system and improve the efficiency of coal pyrolysis.

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