A coal-based fuel pure oxygen combustion power generation system and method based on supercritical carbon dioxide

Abstract

The invention provides a system and a method for generating electricity from coal-based fuel combustion in pure oxygen based on supercritical carbon dioxide (CO2). According to the system and the method, the electricity generating efficiency is high, CO2 is easy to recycle and process, and a pure-oxygen combustion technology is organically combined with cycle electricity generation based on supercritical CO2. The system comprises an air separation system, a gasifier, a combustor, a turbine, a condenser and a compressor which are sequentially connected with one another, as well as an electricity generator connected the power output end of the turbine, wherein the oxygen outlet of the air separation system is connected with the gasifying agent inlet of the gasifier and the combustion improver inlet of the combustor; the coal gas outlet of the gasifier is connected with the fuel inlet of the combustor; the gas inlet of the turbine is connected with the exhaust outlet of the combustor; the gas outlet of the turbine is connected with the gas inlet of the condenser; the exhaust outlet of the condenser is divided into two output channel; one output channel is connected with a CO2 storage system or another system; and the other output channel is connected with a supercritical CO2 circulation pipeline after pressure boosting by the compressor, and connected with both the gasifying agent inlet of the gasifier and the working gas inlet of the combustor.

Description

technical field [0001] The invention relates to the field of advanced and high-efficiency thermal power generation, in particular to a coal-based fuel pure oxygen combustion power generation system and method based on supercritical carbon dioxide. Background technique [0002] In recent years, global warming has become the focus of widespread concern. According to statistics, in the past 100 years, the global average surface temperature has risen by 0.3-0.6°C, while the average temperature in my country has also risen by 0.4-0.5°C. CO emissions from fossil fuel energy conversion 2 It is the main reason for exacerbating the greenhouse effect. [0003] In my country, coal-fired thermal power generation is the 2 Research and development of new coal-based fuel power generation technology is of great significance to the clean and efficient use of coal resources in my country and the mitigation of the greenhouse effect. [0004] Currently, it is possible to implement CO in pow...

AI Technical Summary

Problems solved by technology

However, the current published reports about coal-based fuel supercritical carbon dioxide cycle power generation are mainly based on traditional air combustion and non-contact indirect heat exchange, such as Chinese patents 201520152457.4 and 201610038208.1, etc. reports of critical carbon dioxide binding

Images