Combined production process of low cost zero discharging sea water desalting comprehensive use

Abstract

A low-cost non-pollution process for desalinating seawater and reclaiming its resources includes such steps as pre-treating seawater for cleaning it, concentrating by electric dialysis unit and low-temp vacuumizing pump to obtain saturated saline and diluted saline, extracting various chemicals from said saturated saline, extracting fresh water from diluted saline, and returning the residual saline back to seawater cleaning pool.

Description

technical field [0001] The invention relates to seawater desalination, in particular to a combined production process technology for comprehensive utilization of low-cost zero-discharge seawater desalination. Background technique [0002] Water is the source of life on which all creatures in nature rely for survival. Because of water, there is life on the earth. Since the 18th century, due to the rapid development of industry and the rapid growth of human reproduction, the ecological environment on the earth's surface has continued to deteriorate. More than 60% of the original forests in the world have been destroyed, and the entire earth's ecology has lost its balance. The fresh water resources that human society depends on It is also constantly decreasing, and many rivers have become dry rivers. However, the consumption of domestic water and industrial water necessary for human beings is increasing year by year, and an irresistible contradiction is formed between the redu...

AI Technical Summary

Problems solved by technology

[0006] Applying the above four seawater desalination technologies, the average production cost for each ton of desalinated clean water needs to be RMB 6-10. The price is too high, and it is difficult to fully commercialize and apply it. What’s more, there is a common problem with the above four methods: After being desalinated, a large amount of concentrated brine (concentration doubled, up to about 5% to 6%) is discharged into the sea again, which increases the salinity concentration of seawater in some sea areas and destroys the natural ecological balance of seawater salinity. , causing pollution to the ecological environment of the ocean, so it will pose a threat to the survival of marine organisms in local sea areas

Due to the high temperature of the desalinated brine, long-term discharge is likely to cause algal blooms in local sea areas

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