Hydropower cogeneration system

Abstract

The invention discloses a hydropower cogeneration system. The system comprises: a boiler, which heats circulating water to generate steam; a generator set with subcritical or above-subcritical parameters, wherein the generator set with the subcritical or above-subcritical parameters receives the steam generated by the boiler and performs work to generate first electric energy and produce first extracted steam and first exhausted steam; a back-pressure generator set, which receives the first extracted steam generated by the generator set with the subcritical or above-subcritical parameters, andcontinues to work to generate second electric energy and produce second exhausted steam; a seawater desalination unit, which receives the second exhausted steam, performs desalination treatment on the second exhausted steam, and outputs condensed water and a part of desalinated water to the boiler for use; and a power grid, which receives the first electrical energy and the second electrical energy. The hydropower cogeneration system has the technical effects of desalinating seawater with steam heat energy, achieving self-sufficiency of fresh water, reducing treatment cost for water used by the boiler and realizing cogeneration and symbiosis of water and electric energy.

Description

technical field [0001] The invention relates to the technical field of seawater desalination, in particular to a hydropower cogeneration system. Background technique [0002] With the development of society, in order to meet the sharply increasing demand for electricity, under the huge pressure of environmental protection, newly built generating units with subcritical parameters and above are arranged along the coast. The layout of coastal areas is generally chosen in uninhabited tidal flat areas. These "isolated islands" often lack fresh water resources. Coupled with the large water consumption, the introduction of fresh water requires a huge amount of money to build pipe networks. The high water price causes water competition with fresh water introduction areas. contradictions, and there is a risk of supply cuts. The coast has a huge advantage of having sufficient seawater, and thermal seawater desalination can use low-quality steam to convert seawater into high-quality d...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a hydropower cogeneration system, which is used to solve the technical problems of insufficient supply of fresh water resources and high cost of boiler water treatment in the independent power generation system adjacent to the sea in the prior art

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