Wastewater treatment equipment centrifugal extraction machine of heavy metal wastewater treatment
Found in electroplating heavy metal waste water, electron industry and metallurgical industry, electroplating, electronic industrial waste water, in particular, its composition is very complicated, in addition to containing cyanide (
Waste water and alkali waste water, according to the heavy metal in waste water containing heavy metals are classified, in general can be divided into containing chromium (
Wastewater, containing nickel (
Wastewater, containing cadmium (
Wastewater, containing copper (
Wastewater and zinc (
Waste water, gold (
Waste water, silver (
Waste water, etc.
is all sorts of commonly used method of heavy metals in the wastewater can't break down the destruction, but to transfer their presence and shift their physical and chemical form.
After chemical precipitation treatment, for example, the heavy metal in waste water from the state of dissolved ions and settle into a difficult soluble compounds, moved to the sludge from the water;
After ion exchange treatment, waste water transfer of metal ions on ion exchange resins;
After regeneration and moved to the regeneration of waste liquid from the ion exchange resin.
In short, heavy metal waste water after treatment, two kinds of products, it is basically the processing of heavy metals removal from the water, it is a heavy metal enrichment.
Heavy metal concentration is lower than the discharge standard of treated water can emissions;
If conform to the requirements of the production process water, reuse of best.
heavy metal wastewater treatment methods usually have precipitation, physical and chemical method, electrochemical treatment technology, biochemistry method, solvent extraction method;
The above methods all have their own advantages and disadvantages, when using these methods need to be done according to the characteristics of heavy metal wastewater scheme design.
In many cases, a single method it is often difficult to obtain good results, with � � or a variety of methods can better and faster to achieve the purpose of treatment of heavy metal wastewater.
solvent some of which were extracted from liquid mixture operation known as liquid/liquid extraction.
Centrifugal extraction machine extraction is the use of components selected in the solution of the differences in the solubility of solvent, the solute of liquid-liquid mass transfer, in order to achieve the separation of homogeneous liquid mixture operation.
Raw material liquid mixed with the extracting agent fully contact, complete the solute mass transfer process;
weight according to certain proportion respectively from two two phase solution and feeding tube into the drum shell ring gap formed between the mixed zone, with the aid of the rotation of the drum, through the turbine disc and the impeller to make two phase mixing and dispersing quickly, two phase solution fully mass transfer.
Complete mixing and mass transfer process.
Extraction and extraction residual phase separation process;
mixture under the action of vortex disk into the rotary drum, in the plate to form the bulkhead area, mixture quickly with synchronous rotary drum, in under the action of centrifugal force, the heavier than major phase fluid in the process of upward mobility and gradually away from the drum center on the drum wall;
Small proportion of liquid phase gradually away from the drum wall and on to the center, after clarification of two phase fluid end respectively through their weir plate into the collection chamber and the tube was closed to derivation, respectively, to complete two phase separation process.
From the extraction phase and extraction phase extractant recycling process.
usually use the method of distillation recycling extracting agent.
Removal after extraction of proportion as the extractant extract;
After removal from the extraction agent over extraction of proportion of extraction liquid.