Integrated gasification molten carbonate fuel cell power generating system

Abstract

An integrated gasification molten carbonate fuel cell power generating system comprises an air separation device. An outlet of the air separation device is connected with an inlet of a gasification furnace. An outlet of the gasification furnace is connected with a waste heat recovery device through a high-temperature heat exchanger, a particulate removal device, a desulfurization device, a mercury removal device, and a water-steam conversion device, and then connected with an anode inlet of a molten carbonate fuel cell. The output of the molten carbonate fuel cell is connected with an AC power grid or an electric appliance through a DC / AC converter. Synthesis gas from the gasification furnace is subjected to heat recovery after passing through the high-temperature heat exchanger, is introduced into the high-temperature molten carbonate fuel cell after being subjected to gas purification. Moreover, air is firstly pressurized by a compressor, then is heated by the high-temperature heat exchanger and a low-temperature heat exchanger, and then is used for driving a turbine to generate electricity, and heat is made makes a full use to be converted into electrical power. By adopting the system, the heat utilization rate is increased and the efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of molten carbonate fuel cells, in particular to an integrated coal gasification molten carbonate fuel cell power generation system. Background technique [0002] Molten Carbonate Fuel Cell (MCFC) has many advantages such as high power generation efficiency, low pollution emission and wide fuel adaptability. It has broad application prospects in power stations, military and aerospace and other fields. Molten carbonate fuel cells operate at a high temperature of 650°C. The exhaust gas generated by the battery stack can form a combined cycle with a small gas turbine to further recover heat. The power generation efficiency of the system reaches more than 50%, which is much higher than that of thermal power plants. Due to the advantages of low noise and pollutant emissions, molten carbonate fuel cells can be used as a distributed power supply and can be placed near office buildings, hospitals, etc. for power su...

AI Technical Summary

Problems solved by technology

[0004] At present, the research on IGFC system is still in the development and demonstration stage

In 2001, the United States built a large-scale coal gasification combined cycle power station project with a front fuel cell in Camden. The power generation system is a large coal gasification combined cycle power station (IGCC) with a front molten carbonate fuel cell (MCFC), but Because molten carbonate fuel cells need to work under high pressure, the battery life is greatly reduced

However, in the existing research, the carbonate fuel cell system is regarded as an independent module, which fails to take into account the effective utilization of heat in the whole system.

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