Coal gasification method and device employing plasma torch heating technology

Abstract

The invention relates to a coal gasification method and a device employing a plasma torch heating technology. The method comprises the steps that: 1, feed coal is prepared, and charged into a plasma technical coal gasification furnace continuously by an automatic charging system, 2, the feed coal is gasified in the coal gasification furnace, a plasma torch provides auxiliary heat for slag gasification, a gasification agent is oxygen-enriched air and steam, generated gas is synthesis gas rich in CO and H2, discharged molten slag becomes non-percolative vitreous particles through chilling, 3, heat of the synthesis gas is recovered in a waste heat boiler, then the synthesis gas is cooled and dedusted by washing equipment, and 4, the separated gas and washing wastewater are separately collected, the gas can serve as fuel gas for an industrial furnace or chemical feed gas, and the washing wastewater can be recycled after by-products are recovered from the washing wastewater and the washing wastewater is treated. The feed coal used is wide in application scope, a gasification technology is advanced and applicable, the efficiency of the coal gasification furnace is improved, the gas cost is lowered, the exhaust emission is eliminated, and the wastewater discharge is reduced.

Description

technical field [0001] The invention relates to the field of coal gasification, and more specifically relates to a coal gasification method and device using a plasma torch heating technology. The technology reasonably utilizes coal resources, can improve production efficiency, and has positive significance for environmental protection. Background technique [0002] In my country's chemical industry, metallurgy, building materials, machinery and other industrial fields and municipal gas industry, a kind of atmospheric pressure fixed layer intermittent coal gasification technology and related equipment - coal gasification furnace are widely used. The production efficiency of this coal gasification technology and equipment is relatively high. Low. Due to the limitation of gasification technology, the raw coal must be coke and high-quality anthracite lump coal (bituminous coal can be used for a small number of two-stage coal gasifiers, but high-quality non-sticky bituminous coal...

AI Technical Summary

Problems solved by technology

Although technicians using the above-mentioned coal gasifiers have continuously implemented various improvements, including the use of oxygen-enriched continuous gasification technology to increase the capacity of the coal gasifier and eliminate the emission of blown flue gas, since the basic property of fixed layer gasification has not been changed, Therefore, it still cannot solve the problem of the limited range of raw coal

If modern advanced fluidized bed or entrained bed pressurized coal gasification equipment is used to replace the above-mentioned coal gasifier, not only the investment is large, but also the problem of pressure mismatch in the subsequent application process of coal gas in pressurized coal gasification, and there is also a range of raw coal selection limits

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