Coking technique using coal external burning to replace gas fuel burning

Abstract

A coking process for substituting gas fuel combustion with coal external combustion is carried out by preheating for fired coal by waste-heat recovering unit, burning in burning unit to obtain high-temperature smoke, collecting dust for high-temperature smoke, delivering it into heat-transferring unit, discharging heat to carbonizing chamber by partition, recovering most waste heat by regenerative and dividing-wall heat exchanger and exhausting. It consists of burning unit, heat-transferring unit, regenerative waste-heat recovering unit and dividing-wall waste-heat recovering unit. The energy-saving rate reaches to 20%, it costs low and has better energy utilization. It can be used for industrial production.

Description

technical field

[0001] The invention belongs to the technical field of metallurgy, and in particular relates to a coking process which uses gas as fuel to provide high-temperature heat to the coking process. Background technique

[0002] The properties of coal and gaseous fuels are different. Coal contains a large amount of harmful substances such as ash, while gaseous fuels are clean energy. It is precisely because of the quality of coal and gas fuels and the difference in energy conversion and utilization methods that the power generation efficiency of coal-fired power plants is 10-15 percentage points lower than that of natural gas combined cycle power plants.

[0003] At present, in order to realize the efficient and clean utilization of coal, whether it is the chemical production process or the IGCC power generation system, the coal must be gasified first to create the necessary conditions for the further utilization of coal. However, the coal gasification process is a...

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