New multistage flash evaporation seawater desalting system of thermal power plant

Abstract

The invention discloses a new multistage flash-evaporation seawater desalting system of a thermal power plant. The seawater desalting system comprises high-temperature flash-evaporation chamber groups, low-temperature flash-evaporation chamber groups, an additional flash-evaporation chamber, a compression thermal pump system and a thermal power plant thermal system. According to the seawater desalting system, the low-temperature flash-evaporation chamber groups and the additional flash-evaporation chamber are increased, and the flash evaporation grade is increased, so the freshwater output isincreased; effective heat of high temperature products is recovered and utilized, so the freshwater output is further increased; and the thermal pump system sends pure heat to the thermal power plantthermal system, so the economic of the thermal power plant is improved. The seawater desalting system of the invention, which has the characteristics of much flash evaporation grade, large freshwateroutput, low freshwater cost, and improvement of the comprehensive utilization of the system energy, and is suitable for the low-cost large-scale production of the thermal power plant, can be widely applied to the seawater desalting field.

Description

technical field [0001] The invention belongs to the technical field of seawater desalination, in particular to a multi-stage flash seawater desalination system for thermal power plants. Background technique [0002] Desalination of seawater is an effective strategic approach to solve the problem of shortage of fresh water resources. It is not only a temporary local problem in a certain country or region in a certain period of time, but also a long-term and major problem involving human survival and social development worldwide. question. The energy consumption of seawater desalination is mainly electricity and steam, and thermal power plants can provide a large amount of low-grade steam and cheap power, so seawater desalination devices are combined with thermal power plants for cogeneration of electricity and water to increase freshwater production and reduce freshwater production. Cost has gradually become a recent research hotspot around the world. At present, the global...

AI Technical Summary

Problems solved by technology

This method still has the disadvantages of high energy consumption and high cost of seawater desalination. The main development trend is to improve the single-machine water production capacity of the device, reduce energy consumption per unit product, and improve heat transfer efficiency.

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