A hydrogen fuel cell system based on power plant waste heat

Abstract

The invention relates to a hydrogen fuel cell system based on power plant low-pressure economizer and organic liquid hydrogen storage technology, including hydrogen-rich organic liquid storage tank, metering pump, preheater, dehydrogenation reactor, cooler, steam-water separator, Filter, buffer tank, hydrogen fuel cell, hydrogen circulation pump, air filter, air compressor, intercooler, humidifier, throttle, water storage tank, circulating water pump, deionization device, heat exchanger, DC converter, Dehydrogenation organic liquid tanks, condensers, feed water pumps, shaft seal heaters, low-pressure heaters at all levels, low-pressure economizers, boiler tail flue and other major equipment, use the low-temperature boiler feedwater absorption air compressor at the outlet of the condenser The heat generated by compressed air, the waste heat generated by the hydrogen fuel cell itself and the waste heat generated by the dehydrogenation reaction of organic liquids, and the high-temperature boiler feed water heated by the low-temperature economizer are used to provide reaction heat for the organic liquid dehydrogenation reactor.

Description

technical field [0001] The invention belongs to a hydrogen fuel cell system, and in particular relates to a hydrogen fuel cell system based on a low-pressure economizer of a power plant and an organic liquid hydrogen storage technology, especially for a thermal power plant with a boiler tail gas temperature higher than 150°C. Background technique [0002] With the gradual depletion of fossil energy, the advantages of hydrogen fuel's renewable energy utilization and strategic energy diversification will become increasingly prominent. Moreover, the hydrogen fuel cell system is a zero-emission power generation system (its product is only pure water). Today, as countries around the world pay more and more attention to environmental protection and limit pollution emissions, hydrogen energy will be one of the mainstreams in the future power generation industry. [0003] At present, some equipment in the hydrogen fuel cell system needs to be cooled, such as the intercooler of the a...

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Problems solved by technology

Moreover, it is difficult to coordinate the temperature gradient of cooling and heating, and there is still great potential for improving the energy efficiency of the entire hydrogen fuel cell system.

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