An integrated coal gasification solid oxide fuel cell power generation system and process

Abstract

The invention provides an integrated coal gasification solid oxide fuel cell power generating system and process. The integrated coal gasification solid oxide fuel cell power generating system comprises an air separating device, a gasification furnace, a synthesized gas purifying device, a solid oxide fuel cell, a gas-liquid separator a catalytic combustor and a heat exchanger. The integrated coalgasification solid oxide fuel cell power generating system takes synthesized gas prepared by reaction between coal and oxygen as raw materials, generates power through the solid oxide fuel cell and meanwhile outputs a certain amount of hot water, thereby solving the problem of corrosion and leakage of electrolytes of molten carbonate fuel cells, saving investment and energy and improving the thermal efficiency.

Description

technical field [0001] The invention belongs to the technical field of solid oxide fuel cells, and in particular relates to an integral coal gasification solid oxide fuel cell power generation system and process. Background technique [0002] Fuel cell power generation technology is a power generation device that directly converts the chemical energy of fuel into electrical energy. According to the operating temperature of fuel cells, it is divided into high-temperature fuel cells and low-temperature fuel cells. High-temperature fuel cells include solid oxide fuel cells and molten carbonic acid. Salt fuel cells, low-temperature fuel cells include proton exchange membrane fuel cells, etc. Different from the traditional coal-fired power generation technology, the fuel cell uses electrochemical catalysis to directly convert the chemical energy in the fuel into electrical energy. There is no thermodynamic cycle in the process, and it is not limited by the efficiency of the Carno...

AI Technical Summary

Problems solved by technology

Molten Carbonate Fuel Cell (MCFC for short), the operating temperature is 600-700°C, and its electrolyte is molten Li 2 CO 3 and K 2 CO 3 Mixture, liquid electrolyte management is difficult under high temperature conditions, electrolyte corrosion and leakage are serious during long-term operation, reducing the service life of molten carbonate fuel cells

According to the working principle of molten carbonate fuel cell, CO 2 Must cycle work, i.e. the CO exhausted from the anode 2 Catalyzed removal of H 2 After the treatment, it is mixed with air in a certain proportion and sent to the cathode, and the CO 2 The cycle increases the complexity of the structure and control of the molten carbonate fuel cell system

Moreover, the power generation efficiency of air turbines using air as the working medium is low, which is not conducive to the recovery and utilization of heat in high-temperature fuel cell systems

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