Power cycle method using hydrogen as fuel

Abstract

The invention provides a power cycle method using hydrogen as fuel. The method comprises the following steps that: H2 and CO2 are first subjected to inverse transform reaction and then used for chemical back heating of the O2/CO2 power cycle using hydrogen as the fuel, and a gaseous material richly containing hydrogen is mixed with pressurized circulation gas of CO2; the mixing gas enters an inverse transform reactor to undergo an endothermic chemical reaction to form vapor and CO, and the heat needed in the reaction is provided by the turbine high-temperature discharged gas; the gas generated in the reaction and the pressurized oxygen gas enter a combustion chamber respectively to form high-temperature and high-pressure vapor and CO2; the high-temperature gas passes a gas turbine for turbine power generation; the turbine high-temperature discharged gas first provides heat for the inverse transform reactor, then rejects heat to a waste heat recovering system, and further is cooled and condensed, and H2O in the turbine high-temperature discharged gas is separated; and the remained circulation gas of CO2 is first cooled and supercharged and then returned to a circulation gas mixer. By the technology of chemical back heating, waste heat refrigeration and inlet gas cooling for the inverse transform reaction, the method realizes the highly efficient utilization of hydrogen, and can simultaneously generate electricity and refrigeration with high efficiency.

Description

technical field [0001] The invention proposes a power cycle method using hydrogen as fuel. Specifically related to H 2 and CO 2 The inverse conversion reaction chemically regenerates the O 2 / CO 2 The power cycle can be used for the utilization of hydrogen-containing tail gas in the gas industry. Background technique [0002] There are many kinds of hydrogen-containing tail gas and waste gas in gas industries such as oil refining, natural gas, petroleum gas, blast furnace gas, and chemical processing. A high-purity hydrogen stream obtained through hydrogen enrichment and separation. For example, partial oxidation / combustion decomposition of natural gas to produce C 2 h 2 process, production C 2 h 2 At the same time, a large amount of hydrogen-rich synthesis gas (which contains about 54% H 2 , 46% CO). Another example is the refinery dry gas, which also contains a large amount of hydrogen. Hydrogen as an industrial cycle power provides an effective way for the uti...

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Problems solved by technology

[0004] Given H 2 and CO 2 The power cycle of inverse conversion reaction chemical heat recovery has not been reported

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