Process for preparing direct drinking water through electric drive membrane and equipment of process

Abstract

The invention belongs to the field of seawater desalination and particularly relates to a process for preparing direct drinking water through an electric drive membrane and equipment of the process. The process includes the steps that sea water enters a microfiltration device through a sea water inlet pump and then enters an intermediate water storage tank; whether the quality of water outputted by the intermediate water storage tank meets the set requirement of quality of electrodialysis inlet water or not is judged; the power of a first water pump, the power of a second water pump and the power of a third water pump are controlled, and the output end of the treated water in the intermediate water storage tank is connected into a concentrated water storage tank, a fresh water storage tank and an electrode water storage tank; treated water enters the fresh water storage tank again after being treated through an electric drive membrane device; the treated water enters an ultraviolet sterilizer after entering an activated carbon adsorption device and being treated; the treated water is connected into a drinking water tank after being treated by the ultraviolet sterilizer, and the drinking water tank controls flow and discharge of the water through an external water tap to use the water. The process for preparing direct drinking water through the electric drive membrane and equipment of the process have the advantages that turbidity of sea water can be effectively lowered, growth of germs, alga and other microorganisms can be prevented, the salt removing rate is high, the water yield is high, the operation cost is low, and industrial application and popularization are facilitated.

Description

technical field [0001] The invention belongs to the field of seawater desalination, and in particular relates to a process and equipment for preparing direct drinking water by electrically driving membranes. Background technique [0002] my country's per capita fresh water resources are only 1 / 4 of the world's average, and it is a water-poor country, especially in coastal cities and islands. Solutions to water shortage In addition to the traditional water transfer and storage projects, water conservation and sewage reuse, seawater desalination technology has received more and more attention. At present, the application technologies of seawater desalination mainly include multi-stage flash evaporation, low-temperature multi-effect distillation, reverse osmosis and electrodialysis. Because electrodialysis technology has the characteristics of low power consumption, significant economic benefits, flexible system application, convenient operation and maintenance, long service l...

AI Technical Summary

Problems solved by technology

Seawater, especially the surface seawater with high water temperature contains a large number of microorganisms, which will not only increase the inlet pressure of seawater desalination equipment, cause various accidents, but also affect the quality of effluent water

[0003] The traditional measures to remove microorganisms in the process of preparing direct drinking water from seawater desalination are mainly to kill microorganisms in the pretreatment process, including intermittent chlorination process, "shock" chlorination process, and the use of polymer scale inhibitors, etc., although they can be removed Most of the microorganisms, but it is very difficult to completely remove them, and the traditional seawater desalination equipment has problems such as complex process, large floor area, large consumption of chemicals but poor treatment effect, etc., so it is not suitable for small seawater desalination equipment.

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