Extracting and zero-discharging method of seawater bittern multi-elements

Abstract

The invention relates to an extracting and zero-discharging method of seawater bittern multi-elements. With the method, zero-discharging of seawater bittern can be realized, such that surrounding marine area ecological balance can be protected, and marine pollution can be avoided. Because economic benefits brought by traditional bittern utilization technologies are poor, the utilization rate of bittern is lower than 20%, and all of the rest of bittern is discharged into the sea. If the situation continues, marine environment will be polluted, and a variety of fishes will become extinct. With the method provided by the invention, energy can be saved with a high efficiency, cost can be saved, the bittern resource can be fully utilized, zero-discharging can be realized, bittern can be prevented from polluting the marine environment, and future sea salt production pressures on enterprises can be alleviated.

Description

technical field [0001] The invention relates to the comprehensive utilization technology of seawater bittern, in particular to a method for multi-element extraction and zero discharge of seawater bittern. Background technique [0002] Various chemical elements in the by-product bittern during the salt making process are about 40 times more concentrated than seawater, which is an excellent raw material for extracting chemical elements in seawater, but limited by the technical level, the utilization rate of bittern is less than 20%. A large number of bittern resources are discharged into the sea or circulated in salt pans, which not only causes a waste of resources but also affects the ecological balance of offshore waters. Realizing the thorough comprehensive utilization of bittern is an effective measure to solve the shortage of land resources, a necessary guarantee to realize energy saving and emission reduction in sea salt production, and it is also an urgent problem that ...

AI Technical Summary

Problems solved by technology

[0002] Various chemical elements in the by-product bittern during the salt making process are about 40 times more concentrated than seawater, which is an excellent raw material for extracting chemical elements in seawater, but limited by the technical level, the utilization rate of bittern is less than 20%. A large amount of bittern resources are discharged into the sea or circulated in salt pans, which not only causes a waste of resources but also affects the ecological balance of offshore waters

However, there are deficiencies, such as low extraction rate of bittern resource elements, low recovery rate, high energy consumption, resulting in production costs higher than its selling price, poor economic benefits, it is difficult to promote in the salt chemical industry on a large scale, and has not been fully realized "Zero discharge" of seawater bittern

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