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A combined cycle high-efficiency coal-fired power generation system

A cycle system and combined cycle technology, applied in the direction of machines/engines, steam engine devices, mechanical equipment, etc., can solve the problems of high temperature and high pressure material cost limitations, achieve the goal of reducing material cost, low material performance, and improving coal-to-electricity conversion efficiency Effect

Active Publication Date: 2022-04-05
NO 719 RES INST CHINA SHIPBUILDING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application provides a combined cycle high-efficiency coal-fired power generation system, which solves the technical problem in the prior art that although there is a solution to improve the efficiency of coal-to-electricity conversion, it is limited by the cost of high-temperature and high-pressure materials.

Method used

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  • A combined cycle high-efficiency coal-fired power generation system
  • A combined cycle high-efficiency coal-fired power generation system
  • A combined cycle high-efficiency coal-fired power generation system

Examples

Experimental program
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Effect test

Embodiment 1

[0029] like figure 1 As shown, the present embodiment provides a combined cycle high-efficiency coal-fired power generation system, including: a coal-fired boiler 1, a supercritical CO 2 Circulation system and steam Rankine cycle system; supercritical CO 2 The circulation system and the steam Rankine cycle system are respectively connected to the coal-fired boiler 1;

[0030] Supercritical CO 2 The circulatory system includes: CO 2 Turbine 5, CO 2 Regenerator 6, CO 2 Cooler 7 and CO 2 booster 8; supercritical CO 2 circulatory system with CO 2 The fluid is a circulating working fluid, after CO 2 The CO after supercharging device 8 supercharging 2 fluid, in turn the CO 2 The regenerator 6 and the coal-fired boiler 1 absorb heat and heat up to the first temperature, and the CO after heat absorption and temperature rise 2 Fluid enters CO 2 Turbine 5 expands work, CO after work 2 Fluid passes through CO 2 Regenerator 6 and CO 2 Cooler 7 cooling, the cooled CO 2 Flui...

Embodiment 2

[0055] like figure 2 As shown, this embodiment provides a combined cycle high-efficiency coal-fired power generation system. On the basis of Embodiment 1, this embodiment also includes: a first CO 2 - steam heat exchanger 16;

[0056] Supercritical CO 2 CO in the circulatory system 2 CO after turbine 5 expands work 2 The fluid, after heat exchange with the steam Rankine cycle system in the first CO2-steam heat exchanger 16, enters the CO in sequence 2 Regenerator 6 and CO 2 Cooler 7 cooling;

[0057] In the steam Rankine cycle system, the pressurized water fluid after passing through the feed water pump 14 is divided into the first path and the second path, and the water fluid in the first path is in the first CO 2 -Steam heat exchanger 16 with supercritical CO 2 The circulation system performs heat exchange, and the water fluid of the second path absorbs heat and heats up in the coal-fired boiler 1, and the water fluid of the second path after heat absorption and temp...

Embodiment 3

[0063] like image 3 As shown, this embodiment provides a combined cycle high-efficiency coal-fired power generation system. In this embodiment, on the basis of Embodiment 1, the combined cycle high-efficiency coal-fired power generation system also includes: a second CO 2 - steam heat exchanger 17;

[0064] Supercritical CO 2 CO in the circulatory system 2 CO after turbine 5 expands work 2 The fluid, after heat exchange with the steam Rankine cycle system in the second CO2-steam heat exchanger 17, enters the CO in turn 2 Regenerator 6 and CO 2 Cooler 7 cooling;

[0065] In the steam Rankine cycle system, the pressurized water fluid after passing through the feed water pump 14 is divided into the third road and the fourth road, and the water fluid in the third road is in the second CO 2 -Steam heat exchanger 17 with supercritical CO 2 The circulation system performs heat exchange. The water fluid in the fourth path absorbs heat and heats up in the high-pressure heater 1...

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Abstract

The invention discloses a combined cycle high-efficiency coal-fired power generation system, comprising: a coal-fired boiler, a supercritical CO 2 Circulation system and steam Rankine cycle system; supercritical CO 2 The circulatory system includes: CO 2 Turbine, CO 2 Regenerator, CO 2 Cooler and CO 2 pressurization device; through the CO 2 CO after pressurization by booster 2 fluid, in turn the CO 2 The regenerator and coal-fired boiler absorb heat and heat up to the first temperature, and the CO after heat absorption and temperature rise 2 Fluid enters CO 2 Turbine expansion does work, CO after doing work 2 Fluid passes through CO 2 regenerator and CO 2 cooler cooling, the cooled CO 2 Fluid passes through CO 2 Supercharging device pressurization; steam Rankine cycle system includes: steam turbine, condenser, feed water pump; after the water fluid is pressurized after passing through the feed water pump, it absorbs heat in the coal-fired boiler and heats up to the second temperature. The water fluid enters the steam turbine to expand and perform work, the water fluid after work is condensed through the condenser, and the condensed water fluid is pressurized through the feed water pump; the first temperature is greater than the second temperature.

Description

technical field [0001] The invention relates to the technical fields of mechanical engineering and energy saving, in particular to a combined cycle high-efficiency coal-fired power generation system. 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 2018, the national installed capacity was 1.90 billion kilowatts, of which thermal power installed capacity reached 1.14 billion kilowatts, and its installed capacity accounted for 60.2% of the total power generation in 2018. Any progress will bring huge economic and social benefits. [0003] In order to greatly improve the efficiency of coal-to-electricity conversion, the European Union, Japan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01K25/10F01K11/02F01K7/32
CPCF01K25/103F01K11/02F01K7/32
Inventor 冯雪佳王春国刘少有郭洪婧余志庭毕雄李帅军王顺森吴闯
Owner NO 719 RES INST CHINA SHIPBUILDING IND
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