Combined power and water cogeneration system and method for nuclear power plant combined with gas turbine

Abstract

The invention discloses a nuclear power plant and gas turbine combined electricity-water cogeneration system and method. The electricity-water cogeneration system comprises a nuclear power plant secondary circuit system, a gas turbine generator unit, a wet gas reheater, a seawater desalting device, a gas-water separator, a drain cooler, a compressor, a steam injection pipeline, a wet gas pipeline and an original seawater pipeline. A stream of reheated steam from the nuclear power plant secondary circuit system is introduced into a combustion chamber of the gas turbine generator unit, wet exhaust of a gas turbine is used for heating reheated steam of a nuclear power plant through the wet gas reheater so as to increase the temperature of the reheated steam greatly, then the seawater desalting device is driven to produce fresh water, finally fresh water obtained after condensation of wet exhaust and waste heat are recovered through the gas-water separator and the drain cooler in sequence, and final-stage secondary steam of the seawater desalting device is directly introduced into a condenser of the nuclear power plant for condensation recovery so as to serve as make-up water of the nuclear power plant. By the adoption of the electricity-water cogeneration system and method, the heat economical efficiency of the nuclear power plant is improved remarkably, and gas turbine cycle efficiency is quite high.

Description

technical field [0001] The invention belongs to the technical field of power generation and seawater desalination, and in particular relates to an electricity-water cogeneration system combined with a gas turbine in a nuclear power plant and a method thereof. Background technique [0002] With the development of society and economy, our country may face energy crisis and fresh water crisis at the same time in the future. As a kind of clean energy, nuclear power is of great significance to meet the power demand, optimize the energy structure, and reduce environmental pollution. Under the relevant national policies, my country's nuclear power industry has been vigorously developed. From the perspective of safety, the new steam of nuclear power plants can only use saturated steam with relatively low parameters, so the cycle efficiency of nuclear power plants is only about 30%, which is far lower than that of thermal power plants. Modern nuclear power plant steam turbine units ...

AI Technical Summary

Problems solved by technology

At present, seawater desalination projects in nuclear power plants use steam extraction from steam turbines or high-temperature exhaust steam as the heat source for seawater desalination equipment, which will inevitably lead to insufficient work of extraction steam or a decrease in the enthalpy drop of the new steam, resulting in heat loss in nuclear power plants. The economy is further reduced

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