Split-flow recompression pure oxygen combustion circulation system

Abstract

According to the split-flow recompression pure oxygen combustion circulation system with pure oxygen as the combustion improver, a combustion chamber, a gas turbine, a waste heat boiler, a first low-pressure compressor, a first intercooler and a first high-pressure compressor are sequentially connected in series, and a low-pressure steam turbine, a condenser, a condensate pump, a deaerator and a water feeding pump are sequentially connected in series. The hot end outlet side of the waste heat boiler is connected with the high-temperature inlet side of the low-pressure steam turbine and the inlet side of the first low-pressure compressor, so that working media flowing out of the hot end outlet side of the waste heat boiler are divided, and the liquid outlet side of the water feeding pump is connected with the cold end inlet side of the waste heat boiler. A high-pressure steam turbine is arranged between the cold end outlet side of the waste heat boiler and the inlet side of the combustion chamber, the low-temperature outlet side of the high-pressure steam turbine is connected with the cold end inlet side of a first intercooler and a gas turbine, and the cold end outlet side of the first intercooler is connected with the inlet side of the combustion chamber. The hot end inlet side is connected with the outlet side of the first low-pressure compressor, and the hot end outlet side is connected with the inlet side of the first high-pressure compressor.

Description

technical field [0001] This application relates to the field of cycle power generation, and in particular to technical equipment for controlling greenhouse gas emissions, carbon emission reduction technical equipment, carbon capture and carbon sequestration technology and utilization systems. Combustion cycle system. Background technique [0002] Although the existing coal-fired power plants and gas-steam combined cycle power plants can guarantee a stable power supply, the cycle power generation systems of the above-mentioned power plants generally use air as a combustion aid. 2 There are other types of gases, such as nitrogen, etc. Therefore, the process of decarbonization using carbon capture, storage and utilization measures is complicated, which has a great impact on system efficiency and high cost. [0003] On the other hand, in the traditional gas-steam combined cycle power generation system, the working fluid flowing in the top cycle (gas power generation) and the ...

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Problems solved by technology

[0002] Although the existing coal-fired power plants and gas-steam combined cycle power plants can guarantee a stable power supply, the cycle power generation systems of the above-mentioned power plants generally use air as a combustion aid. 2 There are other types of gases, such as nitrogen, etc., so when carbon capture, storage and utilization measures are used for decarbonization, the process is complicated, which has a great impact on system efficiency and high cost

[0003] On the other hand, in the traditional gas-steam combined cycle power generation system, the working fluid flowing in the top cycle (gas power generation) and the working fluid flowing in the bottom cycle (steam power generation) are usually operated separately, only at the waste heat boiler Carry out heat exchange, in this case, the heat exchange loss is relatively large, and the energy utilization efficiency is low

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