Coal pyrolysis system and method

Abstract

The invention discloses a coal pyrolysis system, which comprises a pyrolysis unit, a coke quenching unit, a waste heat recovery unit, a dust removal and purification unit and an oil-water separation and purification unit, wherein the pyrolysis unit, the coke quenching unit, the waste heat recovery unit and the dust removal and purification unit are connected in sequence; the pyrolysis unit comprises a pyrolysis reactor; the pyrolysis reactor takes a heat storage type radiant tube burner as a heating heat source; the oil-water separation and purification unit is connected with the pyrolysis unit for carrying out oil-water separation on crude gas generated by coal pyrolysis. According to the coal pyrolysis system, the heat storage type radiant tube burner is taken as the heating heat source,the temperature of discharged smoke generated by a combustion chamber is not lower than 200 DEG C, in addition, the discharged smoke flows in a radiation tube and is not mixed with the crude gas generated by coal pyrolysis, and the discharged smoke can be directly conveyed to the coke quenching unit to serve as a coke quenching gas carrier. The invention simultaneously provides a coal pyrolysis method which uses the coal pyrolysis system.

Description

technical field [0001] The invention relates to the technical field of coking, in particular to a coal pyrolysis system and method. Background technique [0002] The traditional coal pyrolysis process includes high-temperature pyrolysis and the cooling process of high-temperature materials in the pyrolysis station. At the end of coking, the temperature of the material is generally 950°C to 1100°C. In order to facilitate transportation and storage, it is necessary to cool the red hot material to below 250°C. This process is called coke quenching. Traditional coke quenching technology includes wet coke quenching technology using cold water spray method to cool down and dry coke quenching technology using circulating gas as heat carrier to cool down. Among them, the wet coke quenching technology has simple process and low investment, but it cannot recover the sensible heat of the material, and has great environmental pollution; the dry coke quenching technology is widely used ...

AI Technical Summary

Problems solved by technology

Wet coke quenching not only requires a large amount of water resources, but also cannot recover the sensible heat of materials, resulting in a great waste of resources

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