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The application in printing and dyeing wastewater decolorizing centrifugal extraction machine

by:Deyuan      2020-09-07
According to related statistics, the world every day is about more than 400 tons of printing and dyeing wastewater is directly discharged into natural water bodies, causing serious environmental pollution, very adverse to human body health. In printing and dyeing wastewater is a rich source of dyes, surfactants and inorganic salt, such as benzene, naphthalene and anthraquinones, in rivers and lakes will gradually into toxic substances, therefore, printing and dyeing wastewater treatment and decoloring is imminent.

the printing and dyeing wastewater treatment methods mainly include coagulation precipitation, adsorption, extraction, membrane separation, advanced oxidation method and biochemical method, etc. After a large number of data study, using extraction method for printing and dyeing wastewater treatment works best. For printing and dyeing wastewater treatment, tianyi extraction using centrifugal extraction machine, combined with composite extracting agent for experiments, detailed introduces the application of centrifugal extraction machine in printing and dyeing wastewater treatment.

extraction experiment chooses days CWL50 - M type centrifugal extraction machine, extracting agent choose three octyl amine ( TOA) And second, 2 ethyl hexyl) Phosphate ester ( P204) , sulfonated kerosene ( SK) Printing and dyeing wastewater decolorizing for composite extracting agent. Binder composition, octyl amine, when the experiment the use of three ( 2 ethyl hexyl) Phosphate and sulfonated kerosene volume ratio for 18:12:7 0, water oil ratio of 5:1, initial mass concentration of 1 g/L of material liquid, pH value of 3, at room temperature, extraction experiments can be concluded that the extraction efficiency.

the three octyl amine, 2 ( 2 ethyl hexyl) Phosphate ester and sulfonated kerosene three solvent according to certain proportion mixing composite extracting agent, and raw material liquid into a centrifugal extraction machine in proportion. In the mixed zone, formed between the drum and the shell of the rotating drum with, through the turbine disc and the impeller the two-phase mixing and dispersing quickly, and two phase solution fully mass transfer, mixing and mass transfer process. After mixing the mixture under the action of centrifugal force, completed two phase separation process.

organic load of the separated phase requires the extraction, the recovery of extractant recycling. Inject organic load facies alkali agent in proportion to reverse extraction, centrifugal extraction machine for solvent recycle and reuse, finishing all experiments.

days. cwl - extraction research and development production M machine has been widely used in new type of centrifugal extraction without solid or containing a small amount of solid or liquid liquid extraction separation process.

1, the pharmaceutical industry - — The preparation of pharmaceutical intermediates and apis, traditional Chinese medicine material extraction, etc.

2, fine chemical, — Chemical industry, pesticide intermediates, spices, cosmetics raw material extraction, DMF, 10-channel DMAC and other organic solvent extraction

3, the oil industry - — Lubricating oil extraction of refined diesel desulfurization, etc.

4, the food industry - — Lactic acid, citric acid fermented liquid extraction separation, cooking oil, food pigment extraction,

5, hydrometallurgy - — Copper, vanadium, nickel, cobalt, zinc, rubidium, and rare earth elements such as extraction separation, salt lake boron, lithium extraction

6, the environmental protection industry -- — Waste water, waste acid treatment, printing and dyeing wastewater containing phenol ( H acid, T acid, etc. ) , such as DMF wastewater, naphthalene sulfonic acid wastewater processing

7, oil-water separation - — Part of the separation of organic solvent and water

related extraction equipment figure:

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