Ultrahigh-temperature steam power cycle system adopting hydrogen injection burning mix heating

Abstract

The invention discloses an ultrahigh-temperature steam power cycle system adopting hydrogen injection burning mix heating. Two stages of hydrogen injection burning mix heaters are adopted for replacing a power station boiler system, pure hydrogen serves as fuel, and pure oxygen serves as a combustion improver; high-pressure supplied water coming from a water supply preheating system is sprayed into the first-stage hydrogen injection burning mix heater, and heat released by hydrogen and oxygen combustion is absorbed and mixed with a combustion product to form high-temperature and high-pressure steam; then the steam is fed into a turbine, a high-pressure cylinder does expansion work, then the steam returns to the second-stage hydrogen injection burning mix heater, and high-temperature preheating steam is obtained through hydrogen and oxygen combustion and mix heating; and then the preheating steam is fed into the turbine, a low-pressure cylinder continues to do expansion work, steam is exhausted by the low-pressure cylinder to be fed into a condenser to be condensed into water, and the water returns to the water supply preheating system. A steam system is simplified, high-temperature metal materials are saved, the initial temperature of steam can rise to above 700 DEG C, and the power generation efficiency of a steam power cycle is greatly improved.

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

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