Brackish water desalination device

Abstract

The invention discloses bitter saline water desalination equipment, which comprises a raw water tank, and a high pressure pump, a reverse osmosis membrane component and a drinking water tank which are sequentially connected. The bitter saline water desalination equipment further comprises a physical-chemical program controlled composite coupling preprocessor consisting of a raw water pump, a laminated filter and a program controlled ultrafiltration device which are sequentially connected. The bitter saline water desalination equipment has the advantages that the process of physical-chemical program controlled composite coupling preprocessing filtration is adopted so that the raw water with different types and different qualities can be pretreated to meet the inlet water requirement for the reverse osmosis membrane component, thus the inlet water quality for the reverse osmosis desalination is improved, the rubber body pollution and the microorganism pollution to membrane elements in the reverse osmosis membrane component are prevented, the unit area permeation flux of the reverse osmosis membrane component is improved, and the protection of the reverse osmosis membrane elements is increased; at the same time, the chemical cleaning frequency of the reverse osmosis membrane elements is reduced, the service life of the membrane elements is prolonged, the operating cost is reduced, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of desalination of brackish water, and in particular relates to a brackish water desalination device capable of solving domestic drinking water, especially rural brackish water, high fluorine water, high arsenic water and highly polluted water. Background technique [0002] The desalination of brackish water is actually the desalination of salt water, so that the desalination and desalination of salt water can reach the standard of drinking water. The brackish water (seawater) desalination technology is becoming more and more mature in the world, mainly including distillation, electrodialysis and reverse osmosis: Distillation is the process of heating brackish water (seawater) to boil and evaporate, and then condensing the steam into fresh water , this method is expensive, easy to corrode the structure, and difficult to enlarge. Electrodialysis is a membrane separation technology that uses ion exchange memb...

AI Technical Summary

Problems solved by technology

The disadvantage of this technology is that the effect of the above-mentioned pretreated raw water is not ideal, the pollution index SDI is relatively high, and the turbidity is also high. Sometimes the organic matter adsorbed by activated carbon will become a breeding ground for bacteria, so it cannot meet the requirements of reverse osmosis membrane. The water inlet requirements of the module device, so that it is easy to make the membrane elements in the reverse osmosis membrane module device foul very quickly

At this time, in order to maintain the designed water production, the reverse osmosis membrane elements must be chemically cleaned frequently, thereby reducing the service life of the reverse osmosis membrane elements, increasing operating costs, and reducing production efficiency.

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