Integrated oxygen-enriched combustion power system

Abstract

The invention relates to an integrated oxygen-enriched combustion power system which comprises an oxygen-enriched combustion boiler for combusting coal powder, wherein a high-temperature heating surface is additionally arranged in the oxygen-enriched combustion boiler and is used for heating compressed air for driving a gas turbine; the oxygen-enriched combustion boiler is communicated with a gas-gas heat exchanger and is used for receiving heated oxygen and the heated compressed air which are output by the gas-gas heat exchanger and outputting smoke to the gas-gas heat exchanger; furthermore, the high-temperature heating surface of the oxygen-enriched combustion boiler is communicated with the gas turbine and outputs the compressed air heated by the high-temperature heating surface of the oxygen-enriched combustion boiler so as to drive the gas turbine to do work; the gas turbine drives a gas compressor and a CO2 compressor; high-temperature exhaust gas discharged from the gas turbine is conveyed into the highest stage of a generalized backheating heater for further heating water fed by the boiler. According to the integrated oxygen-enriched combustion power system provided by the embodiment of the invention, safe, environment-friendly and economical running of the oxygen-enriched combustion power system can be realized.

Description

technical field [0001] The invention relates to the power field, in particular to an integrated oxygen-enriched combustion power system. Background technique [0002] Compared with the conventional air combustion system in the oxygen-enriched combustion power system, the main component of the boiler flue gas is CO 2 and H 2 O, where CO 2 The mass concentration is over 90%, and it can be directly compressed and liquefied for recycling without separation, thereby significantly reducing CO 2 capture energy consumption. However, due to the addition of an air separation oxygen production system that consumes a lot of energy, the net efficiency of the oxygen-enriched combustion power system is reduced by about 10% compared with the conventional air combustion system, and the investment cost of the system will also increase by 30-40%. In the air separation system, the energy consumption of the compressor accounts for more than 90% of the energy consumption of the system. Accor...

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Problems solved by technology

[0003] In order to control the combustion temperature in the furnace, the oxygen-enriched combustion boiler usually uses 70-80% of a large amount of flue gas for recirculation, so that the heat energy of the flue gas in the oxygen-enriched combustion boiler is not fully utilized, and the use of flue gas recirculation fans also increases. Power Plant

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