2 results about "Microfiltration" patented technology

The invention discloses a preparation method of high-purity gynostemma pentaphylla total saponin for veterinary drugs. The preparation method is characterized in that a medicinal gynostemma pentaphylla total saponin medicinal material is used as a raw material, and the high-purity target product, namely the gynostemma pentaphylla total saponin for the veterinary drug, is obtained by high-efficiency extraction and separation on the basis of combination of technologies such as continuous countercurrent supersonic wave extraction, ceramic membrane microfiltration and macroporous resin adsorption separation with a conventional solvent reflux extraction principle. The preparation method has the advantages that the product purity and the product yield are improved, the product quality and the high quality are stabilized, the production cost is reduced, the requirements on the development of the high-purity gynostemma pentaphylla total saponin for the veterinary drugs and highly-processed products of gynostemma pentaphylla total saponin are satisfied, the production process is in line with environmental protection requirements, and the difficulty in the coordination of working procedures such as extraction, solvent recovery, enrichment and purification occurring in the volume production process of the gynostemma pentaphylla total saponin for the veterinary drugs is solved through the continuous improvement of the technology and the adjustment of technological processes and technical parameters.

The invention discloses a zero-discharge treatment method and system for mine strong brine. The zero-discharge treatment method for the mine strong brine comprises the following steps: S1, carrying out primary filtration and impurity removal treatment on the mine strong brine, and then carrying out primary reverse osmosis concentration; S2, performing chemical softening treatment on the primary reverse osmosis concentrated water; S3, carrying out secondary filtration and impurity removal treatment on the softened produced water, and then carrying out secondary reverse osmosis concentration; S4, carrying out microfiltration treatment on the secondary reverse osmosis concentrated water; S5, carrying out evaporation and concentration treatment on the microfiltration produced water; S6, performing sodium sulfate crystallization treatment on the concentrated solution, and sequentially thickening, centrifuging and drying the nitre slurry to obtain sodium sulfate; and S7, carrying out sodium chloride crystallization treatment on the saturated mother liquor subjected to sodium sulfate crystallization treatment in the step S6, and sequentially thickening, centrifuging and drying salt slurry to obtain sodium chloride. According to the invention, the water recovery rate of the production wastewater is greatly improved, the environment is protected, the crystalline salt is recycled, and the zero emission target of the mine strong brine is really achieved.