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 in particular relates to an air-type submerged distillation-multi-effect evaporation seawater desalination device combined with an absorption heat pump and a method thereof. Background technique [0002] Desalination of seawater is an effective strategic approach to solve the shortage of fresh water resources, and it is a long-term and major problem involving human survival and social development worldwide. Currently, seawater desalination methods mainly include distillation (such as low-temperature multiple-effect evaporation, multi-stage flash evaporation, and pressure steam distillation) and membrane methods (such as reverse osmosis). Distillation has the advantages of using low-grade heat sources and large device production capacity, and is currently a widely used seawater desalination technology. Among them, the heat transfer process of low-temperature multi-effect evapora...

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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