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High-efficiency ultralow-emission coal-fired power generation system and power cycle method thereof

A power generation system and power cycle technology, applied in combustion methods, machines/engines, indirect carbon dioxide emission reduction, etc., can solve problems such as incomplete elimination of harmful substances

Inactive Publication Date: 2021-03-30
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, removing nitrogen in the air involved in combustion is one of the most effective methods to solve NOx and ammonia emissions. However, in addition to carbon, there are many other elements in raw coal, such as hydrogen, sulfur, phosphorus, etc. Nitrogen, does not completely eliminate harmful substances

Method used

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  • High-efficiency ultralow-emission coal-fired power generation system and power cycle method thereof
  • High-efficiency ultralow-emission coal-fired power generation system and power cycle method thereof
  • High-efficiency ultralow-emission coal-fired power generation system and power cycle method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The system is mainly composed of combustion device 1, CO 2 Turbine unit 2, regenerator 3, cooler 4, CO 2 Compression pump 5, generator 6, coking unit 7, air separation unit 8, heat exchanger 9, gas purification unit 10, etc. The working principle is: coal combustion enters the coking device 7 from I2, the high-temperature charcoal (state point P2) it produces enters the combustion device 1, and the high-temperature gas (state point P4) and high-temperature flue gas (state point P3) it produces enter the heat exchange 9; the air enters the air separation unit 8 from I1, and the high-purity oxygen (state point P1) produced by it enters the combustion unit 1 after absorbing the waste heat of high-temperature gas and high-temperature flue gas in the heat exchanger 9. Heater 3 high temperature CO 2 High temperature and high pressure CO produced by mixed combustion 2 After gas purification into CO 2 The turbine device 2 expands to do work and drives the generator 6 to gen...

Embodiment 2

[0039] The system is mainly composed of combustion device 1, CO 2 Turbine unit 2, regenerator 3, cooler 4, CO 2 Compression pump 5, generator 6, coking unit 7, air separation unit 8, heat exchanger 9, gas purification unit 10, waste heat turbine unit 11, condenser 12, waste heat circulation compression pump 13, waste heat turbine generator 14, etc. composition. The working principle of the system is: coal combustion enters the coking device 7 from I2, the high-temperature charcoal (state point P2) it produces enters the combustion device 1, and the high-temperature gas (state point P4) and high-temperature flue gas (state point P3) it produces enters The heat exchanger 9 releases heat; the air enters the air separation unit 8 from I1, and the high-purity oxygen (state point P1) produced by it enters the combustion unit 1 after absorbing the waste heat of high-temperature coal gas and high-temperature flue gas in the heat exchanger 9. Charcoal and high temperature CO from reg...

Embodiment 3

[0042] The system is mainly composed of combustion device 1, CO 2 Turbine unit 2, regenerator 3, cooler 4, CO 2 Compression pump 5, generator 6, coking unit 7, air separation unit 8, heat exchanger 9, gas purification unit 10, waste heat turbine unit 11, condenser 12, waste heat circulation compression pump 13, waste heat turbine generator 14, CO 2 Heat exchanger 15 etc. are formed. The working principle of the system is: coal combustion enters the coking device 7 from I2, the high-temperature charcoal (state point P2) it produces enters the combustion device 1, and the high-temperature gas (state point P4) and high-temperature flue gas (state point P3) it produces enters Heat exchanger 9; air enters the air separation unit 8 from I1, and the high-purity oxygen (state point P1) produced by it is combined with CO 2 CO in the power cycle (node ​​N3) 2 Commonly enter the heat exchanger 9, absorb the waste heat of high-temperature coal gas and high-temperature flue gas and ent...

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Abstract

The invention belongs to the technical field of energy conservation, and particularly relates to a high-efficiency ultralow-emission coal-fired power generation system and a power cycle method thereof. The system comprises a combustion device, a CO2 turbine device, a heat regenerator, a cooler, a CO2 compressor, a power generator, a coking device and an air separation device, a combustion medium generated by the coking device and oxygen generated by the air separation device are pressurized and then combusted in the combustion device to generate high-temperature and high-pressure CO2, the high-temperature and high-pressure CO2 enters the CO2 turbine device to expand to do work and drive the power generator to generate power, and after exhaust gas of the CO2 turbine device is cooled by theheat regenerator and the cooler and pressurized by the CO2 compressor, part of gas is heated by the heat regenerator and enters the combustion device. According to the system, through ingenious combination and innovation of coal carbonization, nitrogen-free combustion and high-parameter CO2 power cycle, NOx, SOx and CO2 emission-free efficient utilization of coal basic components (carbon) is realized.

Description

technical field [0001] The invention belongs to the technical field of energy saving, and in particular relates to a high-efficiency ultra-low emission coal-fired power generation system and a power cycle method thereof. Background technique [0002] The characteristics of my country's energy structure determine the dominant position of thermal power generation in power production. In recent years, although the proportion of nuclear power, wind power, and solar power has been increasing, coal-fired power generation is still the absolute main force of my country's electricity production. As of the end of 2015, its installed capacity reached 990 million kilowatts, its power generation accounted for 73.1% of the total power generation in 2015, and coal-fired power generation accounted for about 50% of my country's total coal consumption. Because of this, in public opinion, coal-fired power plants have become the target of public criticism for causing air pollution and smog in ...

Claims

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Application Information

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IPC IPC(8): F01K25/10F01D15/10F23J15/06F23L15/00
CPCF01D15/10F01K25/103F23J15/06F23L15/00Y02E20/34
Inventor 王顺森董琨程上方张磊乔加飞张俊杰
Owner XI AN JIAOTONG UNIV