Hydrogen gas turbine combined cycle poly-generation method without NOx emission
A gas turbine and combined cycle technology, which is applied in the direction of gas turbine devices, combined combustion mitigation, machines/engines, etc., can solve problems such as NOx generation, achieve the effects of improving power generation efficiency, avoiding NOx generation problems, and high energy conversion efficiency
Active Publication Date: 2020-11-06
NANJING INST OF TECH
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[0005] In order to realize the application of hydrogen energy in power generation or integrated energy systems, and to avoid the problem of NOx produced by hydrogen in the combustion process of gas turbines, the present invention provides a hydrogen gas turbine combined cycle polygeneration method without NOx emissions, using CO 2 replace N 2 Hydrogen combined cycle power generation and polygeneration system and method of operation thereof
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[0054] start up:
[0055] Open the flue gas release damper, start the air separation and oxygen production unit ② to prepare pure oxygen, O 2 The purity is 97%, and excess pure oxygen is supplied to the waste heat boiler ④. Simultaneously open the CO 2 Quick replenishment function, spray CxHyOz fuel into the waste heat boiler, such as methane, and burn to generate CO 2 , detect the composition of the flue gas at the diffuser, start the second compressor, and drive the flue gas to circulate. When the flue gas pressure in the circulation space rises gradually and the CO 2 After the concentration accumulation exceeds 20vol%, open the flue gas CO 2 Separation device (CS), increase fuel input in waste heat boiler ④, quickly supplement CO 2 . On the one hand, it improves the flue gas flow in the circulation space, and on the other hand, it separates and stores CO 2 , Prepare for the adjustment of the flue gas composition. When flue gas CO 2 After the concentration is close ...
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The invention designs a hydrogen gas turbine combined cycle poly-generation method without NOx emission. The combined cycle poly-generation method consists of a Brayton cycle and a Rankine cycle, andthe method is mainly applied to H2 or CxHyOz type nitrogen-free fuel. CO2 is used for replacing N2 and is matched with high-purity O2 prepared through air separation, and circulating flue gas with theCO2 and the O2 as main components is formed; a split type gas turbine is used, high-temperature flue gas is generated through combustion, H2O is separated through condensation, the flue gas is recycled, continuous operation of the hydrogen gas turbine is achieved, and the problem of thermal NOx caused by conventional air combustion supporting is avoided; due to the requirement of flue gas condensation, the Rankine cycle and flue gas deep waste heat utilization are used in a matched mode; and key equipment or unit comprises an air separation oxygen generation and storage unit, a CO2 regeneration and storage unit, the split type gas turbine, a waste heat boiler with an afterburning function, a Rankine cycle unit, a condensation heat exchanger, a flue gas recirculation and regulation unit, an N2 utilization unit and the like.
Description
technical field [0001] The invention provides a NOx-free hydrogen power generation and polygeneration system based on a gas turbine, relates to a split type hydrogen gas turbine and supporting flue gas circulation and regulation technology, and belongs to the technical field of comprehensive utilization of hydrogen fuel. Background technique [0002] Hydrogen energy is a clean secondary energy source. With the large-scale hydrogen production by reforming fossil fuels and the maturity of efficient hydrogen production technology by hydrolysis, the hydrogen energy industry chain and its various link technologies are developing vigorously. In terms of end use, the hydrogen utilization method is hydrogen fuel cell technology. However, this technology has high hydrogen storage pressure, noble metal consumption, and low power density, so it is not very suitable for the field of power generation. [0003] Hydrogen can also be used as fuel for internal combustion engines (CN1072219...
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IPC IPC(8): F02C3/22F02C6/00F02C6/18F01K23/10
CPCF02C3/22F02C6/00F02C6/18F01K23/10Y02E20/14Y02E20/16
Inventor 宋国辉崔晓波张思文王红艳郭淑青
Owner NANJING INST OF TECH