Tri-cogeneration system and tri-cogeneration method for generating power, producing hydrogen and producing fresh water by aid of high-temperature gas-cooled reactor of nuclear power plant

Abstract

The invention discloses a tri-cogeneration system and a tri-cogeneration method for generating power, producing hydrogen and producing fresh water by the aid of a high-temperature gas-cooled reactor of a nuclear power plant. The tri-cogeneration system comprises a closed helium circulating system of the nuclear power plant, a superheater, a steam generator, a raw seawater pipeline, a flash evaporator, a steam ejector, a seawater desalting device, a water feeding pump, a solid oxide electrolytic tank and an auxiliary steam pipeline. The tri-cogeneration system and the tri-cogeneration method have the advantages that the circulating system of the nuclear power plant, steam electrolysis and hydrogen production processes and distillation seawater desalination processes are coupled with one another, the power is generated by the aid of a helium gas turbine at first, waste heat of partial exhaust gas of the helium gas turbine is used for electrolyzing steam and producing the hydrogen, low-temperature waste heat cooling water of a cooler is used for carrying out distillation seawater desalination by means of coupled flash evaporation and steam injection, and accordingly diversified water, power and hydrogen tri-cogeneration modes can be implemented; the electric power and the fresh water which are required for steam electrolysis and hydrogen production can be provided by means of seawater desalination and nuclear power generation, accordingly, the tri-cogeneration system is high in circulating heat efficiency and good in adjustment performance and has a good economic benefit, the reliability of equipment can be improved, environmental pollution can be reduced, the tri-cogeneration system and the tri-cogeneration method have excellent application prospects, and the like.

Description

technical field [0001] The invention belongs to the technical field of nuclear energy application, and in particular relates to a nuclear power plant high-temperature air-cooled reactor power generation system and method for hydrogen-production and freshwater triple-generation. Background technique [0002] With the development of society and economy, my country may face a series of problems such as energy shortage, environmental pollution, and fresh water shortage in the future. As a kind of clean energy, nuclear power is of great significance for meeting power demand, optimizing energy structure, and reducing environmental pollution. In the future, my country will vigorously develop nuclear power. The high-temperature gas-cooled reactor in the nuclear power reactor type is the fourth generation of advanced nuclear power technology, which has the characteristics of good safety and good thermal economy. At present, my country has a good grasp of this technology and gradually...

AI Technical Summary

Problems solved by technology

It can be seen from the analysis that even if all the power generation of this scheme is used for electrolytic hydrogen production, the steam consumed by electrolytic hydrogen production only accounts for a small proportion of the total steam volume. The latent heat of vaporization is very small compared to the value, so most of the heat energy of high-temperature helium is still depreciated and utilized, which is similar to the high-temperature gas-cooled reactor using steam cycle alone, and at the same time, the outlet water temperature of the steam cycle condenser is low (about 40 ℃) Difficult to use, causing a lot of cold source loss, so the above scheme is actually not advisable

Images