A super high temperature steam power cycle system using hydrogen injection combustion hybrid heating

Abstract

An ultra-high temperature steam power cycle system using hydrogen injection combustion hybrid heating, using a two-stage hydrogen injection combustion hybrid heater to replace the power plant boiler system, using pure hydrogen as fuel and pure oxygen as a combustion aid, from the feed water preheating system High-pressure feed water is sprayed into the first-stage hydrogen-injection combustion hybrid heater to absorb the heat released by hydrogen-oxygen combustion and mix with combustion products to form high-temperature and high-pressure steam, which is then sent to the high-pressure cylinder of the steam turbine to expand and perform work, and then returns to the second-stage hydrogen injection Combustion hybrid heater, through hydrogen and oxygen combustion and mixed heating, to obtain high-temperature reheated steam, and then send the reheated steam to the middle of the steam turbine, the low-pressure cylinder continues to expand and work, and the exhaust steam of the low-pressure cylinder is sent to the condenser to condense into water and then return As for the feed water preheating system, the invention simplifies the steam system, saves high-temperature metal materials, and can increase the initial temperature of the steam to above 700°C, greatly improving the power generation efficiency of the steam power cycle.

Description

technical field [0001] The invention belongs to the technical field of steam power cycle power generation, and particularly relates to an ultra-high temperature steam power cycle system adopting hydrogen injection combustion hybrid heating. Background technique [0002] At present, most of the conventional thermal power units in thermal power plants adopt the steam power cycle system with reheating and reheating based on the basic principle of the Rankine cycle. The initial temperature and initial pressure of the fresh steam continue to increase, and the fresh steam pressure of the supercritical unit has reached above 26MPa. The temperature reaches 600°C, and the power generation efficiency can reach 45%, while the further developed ultra-high parameter unit hopes to increase the initial steam temperature to above 700°C, and achieve a power generation efficiency of up to 50%. However, it is not easy to increase the initial steam temperature to 700°C. High-temperature and hig...

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Problems solved by technology

[0004] There are currently no reports showing the combination of steam power cycle and IGCC (Integrated Gasification Combined Cycle) power generation in thermal power plants

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