A system for coupling in-situ pyrolysis of oil-rich coal with carbon capture

Abstract

The invention discloses a system for in-situ pyrolysis of oil-rich coal coupled with carbon capture, comprising a power plant oxygen-enriched combustion boiler, a compressor, an air separation device, a heat exchanger, a gas-liquid separation device and a boiler air preheater. For fuels with high tar yields such as oil-rich coal, which are easily decomposed to generate oil and gas when heated, the present invention uses the flue gas at the tail of the oxygen-enriched combustion power plant boiler to heat the underground coal seam to realize in-situ pyrolysis and oil extraction of coal, and completes the in-situ coal thermal The cascade utilization of energy in the solution process. The oil produced during the pyrolysis process is extracted, the rest is utilized and the carbon dioxide is captured. The process of inputting fuel and outputting electric energy and oil in the whole system is realized without discharging pollutants and carbon dioxide. In the process of in-situ pyrolysis, the system realizes the clean and efficient utilization of oil-rich coal and promotes the goal of energy carbon neutrality.

Description

Technical field [0001] The present invention relates to an oil-rich coal in situ pyrolysis coupled with carbon capture coupling system. Background [0002] The development of unconventional oil and gas resources provides an alternative path to the supply of oil, and heating pyrolysis can produce a considerable amount of oil and gas products. Pyrolysis and conversion of these coals avoids direct burning of coal, reduces pollution to the atmosphere, and enhances the country's energy security. Conventional mining to the surface and then in the refining furnace to produce oil production process produces a lot of pollution, and the pyrolysis residue after pyrolysis is also a huge amount of solid waste, if not properly handled can pollute the surface soil. As an emerging model, underground in situ pyrolysis can reduce the pollution of the atmosphere and soil, and the process of heating pyrolysis extraction is carried out underground, but because the pyrolysis process requires a large a...

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Problems solved by technology

The process of conventional mining to the ground and then refining oil in the refining furnace produces a lot of pollution, and the pyrolysis residue with low volatile content after pyrolysis is also a huge amount of solid waste. produce pollution

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