System and method for capturing coal-fired power plant CO2 by use of molten carbonate fuel cell

A technology of molten carbonate and coal-fired power plants, applied in fuel cells, separation methods, chemical instruments and methods, etc., to achieve the effects of improving efficiency, reducing energy consumption, and reducing CO2 emissions

Active Publication Date: 2015-08-19
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • System and method for capturing coal-fired power plant CO2 by use of molten carbonate fuel cell
  • System and method for capturing coal-fired power plant CO2 by use of molten carbonate fuel cell
  • System and method for capturing coal-fired power plant CO2 by use of molten carbonate fuel cell

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[0029] The invention provides a method for capturing CO in a coal-fired power plant with a molten carbonate fuel cell 2 The system and method of the present invention will be further described below through the description of the drawings and specific implementation methods.

[0030] Does not recover CO 2 The conventional coal-fired power plant system flow such as figure 1shown. The high-temperature flue gas is heated in the coal-fired power plant boiler 1 to the feedwater in the water wall and the saturated steam in the superheater to become superheated steam, and then passes through the economizer and air preheater to heat the feedwater and air in the economizer to preheat The air in the device is discharged into the atmosphere after desulfurization and dust removal. The superheated steam from the boiler 1 of the coal-fired power plant enters the steam turbine unit 15 of the coal-fired power plant to do work. After the work, the exhaust steam and condensed water meet in t...

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Abstract

The invention belongs to the technical fields of coal-fired power plant CO2 capture and utilization and in particular relates to a system and a method for capturing coal-fired power plant CO2 by use of a molten carbonate fuel cell. The following scheme is put forward by taking a conventional coal-fired power plant not recovering CO2 as a reference system, namely a system composed of the conventional coal-fired power plant, the molten carbonate fuel cell, an independent air separation unit, a waste heat boiler and steam turbine unit and a CO2 recovery unit and used for capturing the coal-fired power plant CO2 by use of the molten carbonate fuel cell, and a method of the system; as a result, the problem of relatively low efficiency after large-amount CO2 emission of the coal-fired power plant and CO2 capture, and CO2 emission reduction of the coal-fired power plant and low-energy consumption CO2 recovery are realized. Besides, the high-temperature exhaust heat of MCFC and a rear combustion chamber are utilized thoroughly, and therefore, the system is enabled to have relatively high efficiency in CO2 recovery.

Description

technical field [0001] The invention belongs to coal-fired power plant CO 2 The technical field of capture and utilization, in particular to a method of capturing CO from coal-fired power plants with molten carbonate fuel cells 2 systems and methods. Background technique [0002] CO 2 It is the main gas that causes the greenhouse effect, while thermal power generation is the emission of CO 2 largest industry, coal-fired power plants are CO 2 A concentrated source of emissions for coal-fired power plants 2 Emission reduction is of great significance to slow down the greenhouse effect. The basic principle of a molten carbonate fuel cell (MCFC) is that the cathode CO 2 and O 2 An electrochemical reaction occurs with the fuel at the anode through the electrolyte, and the cathode consumes CO 2 While the anode produces CO 2 . Use MCFC to connect the flue gas outlet of the coal-fired power plant boiler to make the low concentration of CO in the flue gas 2 As a reactant, ...

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Application Information

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IPC IPC(8): F01K11/02H01M8/06B01D53/32
CPCY02E60/50
Inventor 段立强夏堃曲万军乐龙杨勇平
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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