High-temperature gas-cooled reactor direct hydrogen production coupled steam cycle power generation system and method

Abstract

The invention discloses a high temperature gas cooled reactor direct hydrogen production coupling steam cycle power generation system and a method thereof. The system comprises a high temperature gas cooled reactor, a conversion reactor, a steam generator, a coolant cycle pump, a steam superheater, a turbo generator set, a condenser, a water-feeding pump, a middle temperature converter, a steam extraction pipeline and a natural gas pipeline, wherein a helium outlet of the high temperature gas cooled reactor is connected with a helium inlet of the conversion reactor, a helium outlet of the conversion reactor is connected with the steam generator, a conversion gas outlet of the conversion reactor is connected with the steam superheater, a water steam outlet of the steam generator is connected with a steam inlet of the steam superheater, a steam outlet of the steam superheater is connected with a steam inlet of the turbo generator set, and a steam extraction port of the turbo generator set outputs a blast of steam and is connected with a raw material inlet of the conversion reactor. Through the system, a hydrogen-power cogeneration mode is realized, temperature matching, the high heat utilization rate, low hydrogen production cost and high steam cycle efficiency are realized, and the system further has excellent economic benefits and application prospects.

Description

technical field [0001] The invention belongs to the technical field of nuclear energy application, and in particular relates to a high-temperature gas-cooled reactor direct hydrogen production coupling steam cycle power generation system and a method thereof. Background technique [0002] With the development of my country's nuclear power industry, the high-temperature gas-cooled reactor may become the main advanced reactor type implemented in the future. At present, the core outlet temperature of high-temperature gas-cooled reactors has reached as high as 950°C, which can not only be used for high-efficiency power generation, but also be used to provide high-temperature process heat. The most promising heat utilization method is hydrogen production. There are three thermodynamic cycles that can be used for high-temperature gas-cooled reactors for power generation: helium cycle, steam cycle, and helium-steam combined cycle. The mainstream at this stage is the Brayton closed...

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Problems solved by technology

How to well couple the nuclear energy hydrogen production process and the steam cycle power generation technology needs to focus on the following two aspects: First, the temperature of helium after the heat release of the hydrogen production process is relatively low, about 400~500°C In between, it cannot be used to produce superheated steam with a high enough temperature, and the efficiency of the steam cycle is relatively low; secondly, the hydrogen production process currently also has the problem of high energy consumption, and the temperature of the reformed gas coming out of the reformer is generally 750-800 °C In between, the reformed gas generally enters the low-pressure steam generator to heat the feed water to generate 3.5MPa, 245°C saturated steam as process steam. The heat exchange temperature difference between the reformed gas and the feed water is very large, and the heat is seriously depreciated and utilized. At the same time, the amount of by-product steam belongs to low-grade heat energy and the output is too much, which is far greater than the amount of steam required by the process itself, which involves external heating links and easily causes waste of heat

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