Air type immersing distillation-multiple-effect evaporation seawater desalting device and method

Abstract

The invention discloses an air type immersing distillation-multiple-effect evaporation seawater desalting device and method. The device comprises an immersion combustion distillation device, a lithium bromide absorption type heat pump, a low-temperature multiple-effect distillation device, an air blower, a heat pipe heat exchanger, a draught fan, a gas-water separator and a seawater storage pot. An air inlet of the immersion combustion distillation device is connected with an air side of the heat pipe heat exchanger and the air blower; a water steam and wet hot air outlet is connected with an inlet of a shell of a lithium bromide absorption type heat pump evaporator; an outlet of the shell of the lithium bromide absorption type heat pump evaporator is connected with the gas-water separator; a connecting pipeline is provided with the draught fan; a heat exchanging pipeline of a lithium bromide absorption type heat pump generator is connected with a smoke side of the heat pipe heat exchanger; and a cooling pipeline of a lithium bromide absorption type heat pump condenser is used as a heating steam pipeline of a first-effect device of the low-temperature multiple-effect distillation device. The air type immersing distillation-multiple-effect evaporation seawater desalting device and method have the advantages of high smoke residual heat recycling utilization rate, high device heat efficiency, large fresh water output, low fresh water cost and the like, and can be widely applied to a seawater desalting field.

Description

Technical field [0001] The invention belongs to the technical field of seawater desalination, and particularly relates to an air-type submerged distillation-multi-effect evaporative seawater desalination device and method combined with an absorption heat pump. Background technique [0002] Desalination is an effective strategic approach to solve the problem of shortage of freshwater resources. It is a long-term and important issue involving human survival and social development worldwide. The current seawater desalination methods are mainly distillation methods (such as low-temperature multi-effect evaporation, multi-stage flash evaporation, pressure steam distillation) and membrane methods (such as reverse osmosis). Distillation has the advantages of being able to use low-grade heat sources and large equipment production capacity. It is currently a widely used seawater desalination technology. Among them, the heat exchange process of low-temperature multi-effect evaporation is ...

AI Technical Summary

Problems solved by technology

However, in this technology, it is difficult to completely separate the water vapor and the flue gas, and the fresh water is inevitably polluted by the flue gas, which makes the obtained fresh water difficult to drink directly, which greatly limits the use of this technology. Therefore, this technology must be further innovated to truly Enter the practical stage

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