Integrated pyrolysis and gasification device for seed coal and integrated pyrolysis and gasification method for seed coal

Abstract

The invention provides an integrated pyrolysis and gasification device for seed coal and an integrated pyrolysis and gasification method for seed coal. The integrated pyrolysis and gasification devicecomprises a raw material bin and a reaction bin, wherein the raw material bin is used for storing and discharging seed coal; the reaction bin is used for pyrolyzing and gasifying the seed coal in theraw material bin; an inner cavity of the reaction bin is divided into a pyrolysis area, a gasification area and a coke discharging area; the gasification area and the coke discharging area are arranged below the pyrolysis area in parallel; the seed coal in the raw material bin is pyrolyzed to generate semicoke in the pyrolysis area by utilizing high-temperature synthesis gas generated by gasification as a heat carrier; a part of the semicoke enters the coke discharging area and is discharged as a semicoke product; and the other part of the semicoke enters the gasification area and is gasified, and generated high-temperature water gas and pyrolyzed raw gas are discharged after being filtered and purified by utilizing the seed coal in the rising process from bottom to top. According to theintegrated pyrolysis and gasification technology in the invention, fuel consumption needed by a coal pyrolysis process is reduced, the energy utilization efficiency of a system is improved, the utilization way of semicoke is widened, and the targets of high efficiency and low consumption in the coal chemical industry are achieved.

Description

technical field [0001] The application belongs to the technical field of coal chemical industry, and in particular relates to an integrated pyrolysis gasification device and method for seed coal. Background technique [0002] Based on the status quo of my country's energy supply and consumption structure, the status of coal as the main energy source in China will not undergo a fundamental change. At present, my country's direct combustion-based utilization of coal resources basically only utilizes the combustion properties of coal, resulting in waste of resources for useful components in coal molecules and serious environmental pollution problems. Therefore, it is a problem that my country's coal chemical industry must solve at present to develop a variety of technologies coupled, capable of cascade utilization of coal resources, and clean and efficient coal conversion and utilization technologies. [0003] According to the structure and physical and chemical properties of ...

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Problems solved by technology

[0004] At present, although fast pyrolysis can produce high value-added gas, the semi-coke produced has a large amount of sensible heat, and the recovery and utilization of solid sensible heat is very difficult, and the heat recovery efficiency is low, and the investment in recovery equipment is large; Chilling treatment after high-temperature dust removal not only wastes a lot of waste heat, but also consumes a lot of water and power during the cooling process

[0005] The conventional gasification process is to burn part of the raw material to generate the heat required for gasification, so as to ensure the continuous operation of the gasification process, and the partially burned fuel becomes carbon dioxide, resulting in low thermal efficiency and cold gas efficiency of the gasification process

Moreover, the traditional gasification process needs to obtain high calorific value coal gas. The gasification process requires pure oxygen as the gasification agent, which greatly increases the investment of the air separation plant, and the operation process requires a large amount of electric energy, which greatly increases the operating cost and the rate of return. Greatly reduced

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