Seawater desalination and chemical resource comprehensive extraction device and extraction method thereof

Abstract

The invention provides a seawater desalination and chemical resource comprehensive extraction device and an extraction method thereof. The seawater desalination and chemical resource comprehensive extraction device comprises a raw water sand filtering tank, a primary membrane evaporation and concentration device used for concentrating raw water, a primary pipe mixer used for mixing concentrated water treated by the primary membrane evaporation and concentration device with alkali water, a primary membrane chemical reactor used for extracting chemical components in the concentrated water, a secondary pipe mixer used for mixing filter cogging liquid with alkali liquor, a secondary membrane chemical reactor used for separating calcium carbonate in water, a secondary membrane evaporation and concentration device used for secondary membrane evaporation, and a third pipe mixer used for mixing the concentrated water with chloric acid. The invention is used for extracting chemical products of potassium, bromine and magnesium in an optimizing process while performing the seawater desalination, realizes the industrial salt manufacturing, reduces the chemical medicine consumption, realizes the comprehensive utilization of seawater chemical resources, and achieves the purpose of reducing the emission.

Description

technical field [0001] The invention relates to a seawater desalination and chemical resource comprehensive extraction device and method. Background technique [0002] Aiming at the current severe shortage of fresh water resources, people are increasingly seeking to use seawater as a source of fresh water. Currently, the practical seawater desalination methods mainly include multi-stage flash (MSF), multi-effect evaporation (ME) and reverse osmosis (RO). MSF and ME are operated under high temperature and high pressure, which requires high energy consumption. Reverse osmosis also needs to be operated under high pressure, and has high requirements for raw water pretreatment, resulting in high operating costs. [0003] Using multi-stage flash (MSF), multi-effect evaporation (ME) and reverse osmosis (RO) for seawater desalination, the general freshwater yield is about 50%, and about 50% of concentrated seawater needs to be discharged. With the enhancement of people's awareness...

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Problems solved by technology

The air is sent in from the side and moved to the central part of the tower, and then the air is exhausted from the center of the tower by a fan installed on the upper part of the tower. This method is simple in operation and high in reliability, but it consumes a lot of energy and occupies a large area of ​​equipment

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