Circulating reuse method of pickling depleted brine and apparatus thereof

Abstract

The present invention discloses a method for circulating and reusing preserving salt waste water and a device thereof. A multilayer complex filter is adopted to remove the mechanical impurities and malignant bacteria in the preserving depleted brine. A water soluble macromolecule substance is then selected to be mixed with and dissolved in the preserving depleted brine so as to prepare a mixed solution and a suspensoid. Finally, the mixed solution or the suspensoid is poured into a vacuum salt producing device to produce a powdered refined salt. A quadruple effect evaporating pot is adopted to pressurize under a vacuum condition, and thus not only the manufacturing cost is saved, but also the production efficiency is high and the product quality is good. The multilayer complex filter which is adopted to filter the salt waste water is low in energy dissipation, long in service life, low in cost, and easy to operate and control. The water soluble macromolecule substance is selected to be mixed with and dissolved in the preserving depleted brine, and thus the problems that the saline solution is not easy to dry and is easy to wet twice and agglomerate are solved, and the device has extraordinary significant economic benefits and social benefits.

Description

technical field [0001] The invention relates to a method and a device for recycling organic waste water, in particular to a method and a device for recycling vegetable pickled salt waste water. Background technique [0002] The pickling industry includes pickled mustard, dried bamboo shoots, pickles, radishes, seafood, etc. In particular, pickled mustard is a traditional brand-name pickled vegetable product in my country. It is also called sweet and sour cabbage in Germany and pickled cucumber in France. It is one of the three most famous pickles in the world and has always been loved by consumers. In China, there are thousands of mustard production enterprises, with an annual output value of tens of billions of yuan, which has become a characteristic and pillar industry in some regions. [0003] Pickling generally requires three steps of pickling, followed by high-pressure cleaning, shredding, screening, desalination, pressing, mixing, packaging, pasteurization, drying and ...

AI Technical Summary

Problems solved by technology

[0003] Pickling generally requires three processes of pickling, followed by high-pressure cleaning, shredding, screening, desalination, pressing, mixing, packaging, pasteurization, and drying. In these processes, a large number of Salt will produce a large amount of high-concentration waste salt water for pickling. After testing, the highest salt concentration of these high-concentration waste salt water is about 13%. There are three main methods for the treatment of pickled waste brine: one is direct discharge

But this kind method not only causes serious pollution to environment, causes the salinization of soil, influences water quality and soil quality, influences ecological environment, causes environmental pollution, and wastes a large amount of salt in vain, is unfavorable for realizing circular economy, causes the raising of cost; It is to dilute it and discharge it after reaching the emission standard

This method treats the symptoms but not the root cause, not only cannot solve the problem of environmental pollution, but also increases the amount of water used, which further increases the cost; the third method adopts some deep processing methods to turn the pickled brine into treasure and increase the additional value of the product. value, which is also the development direction of pickled brine treatment at home and abroad. For example, the brine of pickled mustard is concentrated and processed to make mustard soy sauce. However, there are still many problems in the prior art, such as the method of reusing pickled waste brine is not yet mature, the quality of the obtained salt products is low, and it is easy to get damp and agglomerate again; the cost of equipment manufacturing and pickling wastewater treatment costs are high; the process needs to be improved

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