A low-temperature single-stage multi-effect recyclable seawater desalination device

Abstract

The invention provides a low-temperature, single-stage and multi-effect recyclable seawater desalting device. The device comprises a seawater storage tank, a seawater degassing chamber and a support frame, wherein an evaporation chamber is arranged on the support frame, the structure is simple, the design is reasonable, a sponge plate, a hydrophobic membrane and an evaporation cavity are arranged in the evaporation chamber, and the hydrophobic membrane is a capillary and porous membrane, can allow condensed water to directly flow into a fresh water outlet, cannot adsorb water drops and has a better effect; the evaporation chamber is arranged in a 75-degree angle inclination manner and can allow fresh water steam to directly condense and allow condensed water to flow down along the hydrophobic membrane for collection, after hot steam used for heating seawater exchanges heat with the seawater for cooling, the hot steam rises along the evaporation cavity, the boiling point of the seawater is reduced with increase of the rising height of the hot steam, accordingly, fresh water steam is generated again, and the working efficiency is improved; besides, unsuccessfully converted seawater is discharged into the seawater storage tank through a seawater circulating pipeline from a seawater outlet at a water discharge end of the evaporation chamber and is recycled, energy is saved, the overall floor space is smaller, the cost is lower, and the demands of a manufacturer can be better met.

Description

technical field [0001] The invention relates to the technical field of seawater desalination, in particular to a low-temperature single-stage multi-effect recyclable seawater desalination device. Background technique [0002] The essence of seawater desalination is to exchange water. The contradiction between the increasing demand for freshwater and the shortage of energy is the bottleneck problem that restricts the rapid development of seawater desalination technology. Getting the most fresh water with the least amount of energy is the most anticipated desalination method. The main methods of seawater desalination are roughly divided into: membrane method and distillation method. The membrane method is mainly reverse osmosis, and the most common distillation methods are multi-stage flash evaporation, multi-effect distillation, and compressed air distillation. Regardless of the method adopted, the separation of salt and water is an anti-spontaneous process that must consum...

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is to provide a low-temperature single-stage multi-effect recyclable seawater desalination device, which solves the problem of high equipment investment cost caused by the multiple evaporation chambers in series in the existing seawater desalination device to realize steam reuse. The problem of large footprint

In the present invention, the method of setting up the evaporation chamber in the vertical height direction with the help of the gravity water head, combined with the characteristics of high water head, low boiling point and low steam density, which flows from bottom to top, realizes the single-stage evaporation chamber to achieve the multi-stage evaporation chamber array in the traditional technology. The effect of this method completely solves the problem that the equipment in multiple evaporation chambers is extremely large and the investment cost of equipment is high.

Images