A method and device for utilization of anthracite by segmental pyrolysis and quality separation without emission

Abstract

The invention relates to a no-emission segmented pyrolysis and upgrading utilization method and a no-emission segmented pyrolysis and upgrading utilization device. According to the method, CO2, pure oxygen and superheated steam are taken as gasifying agents, and the gasifying agents and coke generated by the anthracite are gasified in a coal gasification pyrolyzing furnace so as to produce gasified gas; the gasified gas is mixed with a light oil component generated by a low-temperature pyrolysis section and a heavy oil component generated by a high-temperature pyrolysis section so as to form raw gas; the raw gas sequentially enters a cyclone dust collector and a sensible heat recoverer so that the dust is removed through centrifuging and the heat is recycled; then the raw gas enters a tar recoverer to remove the heavy oil component and the light oil component; the raw gas enters an intercooler so as to be cooled by circulating cooling water and washed to separate out phenolic water; finally, trace light oil component of the raw gas is removed again by an electric fishing light oil device, and high-quality synthetic gas is obtained. The content of CO and H2 in the synthetic gas reaches over 80%, the synthetic gas can be converted and purified to prepare chemical products such as oil and LNG (liquefied natural gas), and the separated heavy oil component, the light oil component and phenolic water can be recycled, so that the no-emission coal segmented pyrolysis and upgrading utilization method is a new energy technology.

Description

technical field [0001] The invention belongs to the technical field of thermal cracking of coal, and in particular relates to a method and device for segmental pyrolysis and quality separation of anthracite without emission. Background technique [0002] At present, the existing pure oxygen continuous gasification process generally uses secondary metallurgical coke, carbon dioxide, and pure oxygen as gasification raw materials. 70%, CO 2 : 28~29%, H 2 +N 2 : 1 to 1.2%), and then through purification and conversion to prepare qualified synthesis gas synthesis related downstream products. However, the requirements for raw materials used in this process are quite high (about 1% volatile matter, about 82.5% fixed carbon, and the national secondary coke standard), and the cost is also high (the market price of secondary coke is 1800-2000 yuan / ton, while low-rank coal Inland 500-700 yuan / ton), the important thing is that the heavy oil component and light oil component cannot b...

AI Technical Summary

Problems solved by technology

These pyrolysis products are treated as waste gas in the subsequent gas purification process, and have a relatively large negative impact on the subsequent gas purification process

[0004] At present, any gasification process will be accompanied by CO 2 For the generation of gas, the current process is separated and processed in the post-process or recycled to another device, or discharged into the atmosphere, causing environmental pollution and energy waste

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