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Coal integrally-gasified smoke reheating combined-cycle power system

A technology of flue gas reheating and integral gasification, which is applied in the direction of combined combustion mitigation, machine/engine, steam engine device, etc., can solve the problems of flue gas reheating, and achieve the effect of net thermal efficiency improvement, low cost and high energy efficiency

Inactive Publication Date: 2012-02-01
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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AI Technical Summary

Problems solved by technology

Reheating the flue gas with a heat exchanger between two gas turbines is difficult in practice because the flue gas temperature is too high

Method used

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  • Coal integrally-gasified smoke reheating combined-cycle power system
  • Coal integrally-gasified smoke reheating combined-cycle power system

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Embodiment 1

[0014] A coal integral gasification flue gas reheating combined cycle power system, such as attached figure 1 As shown, after the nitrogen compressor 10 compresses the nitrogen produced by the air separation unit, it enters the high-pressure gas turbine 3 together with the high-pressure compressed air produced by the first air compressor 2 and the high-pressure fuel gas produced by the fuel gas compressor 12, and the high-pressure gas turbine 3 The outlet flue gas (including partially incompletely burned fuel gas) enters the medium-pressure gas turbine 4 together with the compressed air generated by the second air compressor 5, and the fuel gas is completely combusted in the medium-pressure gas turbine 4, and the flue gas at the outlet of the medium-pressure gas turbine 4 After entering the waste heat boiler 8, the flue gas releases heat in the waste heat boiler 8 and is discharged into the atmosphere through the chimney. The steam generated by the waste heat boiler 8 enters th...

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Abstract

The invention discloses a coal integrally-gasified smoke reheating combined-cycle power system, which belongs to the technical field of the fossil fuel power circulating power generation. Non-thermal surface reheating concept is utilized, nitrogen which is generated by an air separation unit is pressurized and is interfused into a high-pressure gas turbine, the burning temperature of the high-pressure gas turbine is controlled, after the temperature and the pressure are decreased, the smoke at an outlet of the high-pressure gas turbine enters a middle-pressure gas turbine, and the smoke is burned in a combustion chamber of the middle-pressure gas turbine, so the temperature of the smoke at an outlet of the combustion chamber reaches a designed value. When the power system is designed, the pressure of the smoke at the inlet and the outlet of the high-pressure gas turbine is optimized. The coal integrally-gasified smoke reheating combined-cycle power system has the advantages of high energy efficiency, low cost and low emission. The net thermal efficiency can be improved by 4 to 5 percent compared to that of the traditional coal integrally-gasified combined-cycle electric power plant.

Description

technical field [0001] The invention belongs to the technical field of fossil fuel power cycle power generation, and in particular relates to a coal integral gasification flue gas reheating combined cycle power system. Background technique [0002] In the era of continuous rising energy prices, fossil fuels, especially coal energy, will play an important role in the power industry for a long time. Therefore, the power industry has been working hard to develop new types of fossil fuel power cycles to achieve high efficiency. Combined cycle power system is one of the important options to improve the efficiency of power plants. Based on the above concepts, integrated coal gasification combined cycle (IGCC) is used to convert the energy contained in coal into electricity. IGCC technology first gasifies coal to produce syngas. Impurities are then removed from the syngas or pollutants are converted into usable by-products before the syngas is combusted. In this way, emissions ...

Claims

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Application Information

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IPC IPC(8): F01K23/10
CPCY02E20/16Y02E20/18
Inventor 付忠广杨天亮
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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