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A hybrid working fluid power cycle power generation system retrofitted for CO2 capture in existing power plants

A mixed working fluid and power generation system technology, which is applied in the petroleum industry, the manufacture of combustible gas, machines/engines, etc., can solve the problems of high energy consumption and other problems, and achieve the solution of the peak-valley difference problem of the power grid, small storage space, and simple system Effect

Active Publication Date: 2021-08-10
SOUTHEAST UNIV
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Problems solved by technology

But the existing CO 2 The capture scheme is mainly for the treatment of combustion products, and there is a problem that the cost of energy consumption in the capture process is too high

Method used

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  • A hybrid working fluid power cycle power generation system retrofitted for CO2 capture in existing power plants

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Embodiment

[0029] An existing power plant CO 2 Capture modified mixed working medium power cycle power generation system, including fuel and combustor subsystem, steam turbine subsystem, regenerative cycle subsystem, liquid oxygen supply and CO 2 capture subsystem; where,

[0030] The fuel and combustor subsystem includes a gasifier 1-1, a high-pressure combustor group 1-2, a reheat combustor group 1-3, an auxiliary combustor 1-4, a seventh heat exchanger 1-5, a Eight heat exchangers 1-6; the gasifier 1-1 is provided with a raw fuel inlet 1-1-3, a first supercritical water inlet 1-1-4, a third oxygen inlet 1-1-5, a fuel Gas outlet 1-1-6, residue outlet 1-1-7, second supercritical water inlet 1-1-8, first heat exchange surface 1-1-1, second heat exchange surface 1-1-2, The first heat exchange surface inlet 1-1-1-1, the first heat exchange surface outlet 1-1-1-2, the second heat exchange surface inlet 1-1-2-1 and the second heat exchange surface outlet 1- 1-2-2; the gasifier 1-1 uses co...

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Abstract

An existing power plant CO 2 The capture modified mixed working medium power cycle power generation system consists of fuel and combustor subsystem, steam turbine subsystem, regenerative cycle subsystem, liquid oxygen supply and CO 2 Composition of the capture subsystem; this system provides supercritical water and heat for heating materials to the gasifier with coal as the raw fuel, replaces the traditional boiler with a high-pressure combustor group and a reheat combustor group, and uses combustion products and H 2 O is a mixed working medium, retaining the use of steam turbine and feed water heat recovery subsystem, increasing the pre-expander and supercritical booster water pump to improve system parameters, and adopting the control strategy of combustion to adjust unit load and the peak-shifting storage of oxygen production in valley electricity Energy means, the use of liquid oxygen cold energy for CO 2 Full capture can realize functions such as improving cycle efficiency, widening the high efficiency range of variable working conditions, and reducing NOx emissions.

Description

technical field [0001] The invention relates to a power generating device, in particular to an existing power plant CO 2 Capture modified mixed working fluid power cycle power generation system. Background technique [0002] Carbon dioxide emissions in the energy production process have posed a huge threat to the earth's ecological environment. The goal of human concern has shifted from worrying about energy depletion to more worrying about climate deterioration. Not only to fulfill China's commitments in the Paris Agreement, but also to protect the home of the earth, we must achieve the goal of controlling the increase in global average temperature within 1.5 to 2 degrees within this century. And reduce the CO in the power generation process of the power plant 2 Emissions are the most important task, and it is necessary to control the CO 2 A major breakthrough has been made in capture technology. But the existing CO 2 The capture scheme is mainly for the treatment of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02C3/30F02C6/00F25J3/08C10J3/20C10J3/72
CPCY02P20/54
Inventor 陈亚平赵文娟吴嘉峰
Owner SOUTHEAST UNIV
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