High temperature brine self-heating concentration and fresh water separation system

Abstract

A high-temperature brine self-heating concentration and fresh water separation system belongs to the technical field of seawater desalination and heat exchange equipment. The system is mainly composed of a multi-stage flash evaporation part and a multi-effect evaporation part. It uses the heat of the high-temperature brine's own flash steam as the heat source for the separation of brine-fresh water without external heat. The high-temperature brine enters the first-stage flash evaporator, and the flash-evaporated steam is used as the heat source of the first-effect evaporator / condenser in the multi-effect evaporation part. The drainage from the first-stage flash evaporator enters the second-stage flash evaporator to continue flashing, and the steam generated enters the multi-effect evaporation As the heating source in the pipe, the drainage of the second-stage flash evaporator enters the multi-effect evaporation part, and is sprayed and heated outside the pipe to generate steam, which is condensed at the end of the system to form fresh water. The effect and benefit of the present invention are that it does not need to consume steam heat outside the system, the heat of high-temperature brine can be fully utilized, the brine is concentrated by its own heat, and high-quality fresh water is produced at the same time, which effectively saves energy.

Description

technical field [0001] The invention belongs to the technical field of seawater desalination, and relates to a brine concentration and freshwater separation system, in particular to a brine concentration and freshwater separation system which combines multi-stage flash evaporation and multi-effect evaporation technology and utilizes the heat of high-temperature brine flash steam to concentrate itself and fresh water production separation system, that is, high-temperature brine self-heating concentration and fresh water separation system. Background technique [0002] At present, the current multi-effect evaporation seawater desalination system in the world is a system that uses steam as the main energy source for seawater desalination, and the steam comes from outside the device, that is, steam extraction from power plants or waste heat from industrial equipment. [0003] The system is mainly composed of a series of evaporators / condensers, which usually adopt the process of ...

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Problems solved by technology

[0005] This multi-effect evaporator seawater desalination device, which must provide an external heat source for the first-effect evaporator / condenser, needs to consume the external steam heat of the system. For places where there is no waste heat available, a special steam output device needs to be installed, which reduces the overall economic efficiency of the system.

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