Mixer-settler introduction:
Mixer-settler is by gravity to achieve separation of the two phases of a gradual contact extraction equipment, mainly by the mixing chamber and clarify chamber is composed of two parts. Raw material liquid and extracting agent first after each feeding mouth into the mixing chamber in, the agitator stirring to mixing and mass transfer. Then overflow baffle into a clarifying chamber, achieved the natural separation by gravity. Finally, respectively, into the export, extraction separation process is completed.
In the actual production, the general extraction tank for multi-level, and a stripping section, a washing section, the regeneration section of multiple sections.
Why mixer-settler was still used until now?
Mixer-settlers are still widely used because of their reliability, operating flexibility, and high capacity. They can handle difficult-to-disperse systems, such as those having high interfacial tension and/or large phase density difference. They can also cope with highly viscous liquids and solid-liquid slurries. The main disadvantages are their size and the inventory of material held up in the equipment. For multiple unit operations, considerable capital costs may be needed for pumps and pipings.
A mixer-settler device ordinarily consisted of two parts: a mixer for contacting the two liquid phases to bring about mass transfer, and a settler for their mechanical separation. The mixer and settler can be integral or separate. The operation may be continuous or batchwise.
Mixer settler characteristics:
1, the overall injection molding, the overall non bonding or welding gap, no leakage risk;
2, the structure is neat, the shape is beautiful;
3, short production cycle;
4, the level of free separation and combination, to facilitate the adjustment of the experimental series;
5. The tank material can choose according to the specific needs of transparent organic glass, translucent PP, polyvinylidene difluoride and other materials production, to meet the needs of different systems.
6, with a digital speed control of the motor, can adjust the speed of the motor in real time;
7, each level are left with a sampling hole, convenient sampling and testing;
8, optional feed pump, easy to control the amount of water and organic phase feed.
Mixer-settler can be single-stage or multi-stage (cascade)
For multi-stage system, also known as mixer-settler battery (MSB), it is possible to achieve optimum selection of degree of dispersion because the mixers can be adjusted independently. System expansion is easy by the addition of extra stages to existing system.
Mixer settler widely used in the flowing purposes:
1. Separation of systems with similar boiling points（e.g., separation of aromatics from aliphatic hydrocarbons).
2. Separation of high boiler and low-con-centration solutes from aqueous solutions(e.g., phenol)
3. Separation of mixtures with high boiling points (e.g., vitamins).
4. Separation of temperature-sensitive compounds (e.g., acrylates, biotechnology).
5. Separation of azeotropic mixtures(extraction of acetic or formic acid from aqueous media using,e.g., MTBE as solvent).
6. Extraction of organic compounds from salt solutions (e.g., caprolactam).
7. Extraction of salts from polymer solutions (e.g., ketone resins, polyols).
8. Extraction of metal salts from low-grade ores(e.g., copper).
9. Recovery of nuclear fues(Purex process).
Liquid-liquid extraction is expected that importance of solvent extraction will increasae as the feedback of chemical processes changes from crude oil to biomass. The components obtained in the first processing steps from biomass have more functional groups and are less volatile than the key components obtained from crude oil.Thus, it maybe economically more attractive to use extraction with suitable solvents (including extractants like ionic liquids) than to use distillation at low pressure.
FAQ
Q1. Are CWL-M serious centrifugal extractor fit for our liquid?
A: CWL-M series extractor are widely used in liquid liquid extraction or separation. Liquid liquid extraction, using the the difference of solubility and distribution coefficient of two materials, transfer the solute from one solvent to another solvent. CWL-M series centrifugal extractor mainly used in industries such as oil water separation, pharmacy, pesticide, hydrometallurgy, environmental protection etc. So if your process is liquid liquid extraction and no solid, you can use our centrifugal extractor.
Q2: How do we judge the treatment effect of CWL-M centrifugal extractor?
A: we have research center in our company, to provide client test before sale and extraction process etc, in our research center, we have more than 20 centrifugal extractor for laboratory or pilot test, and after some years test, we have accumulated many experience on hydrometallurgy, chemical, pharmacy industries. We welcome you to visit our research center for laboratory or pilot test.
Q3:What is the difference between CWL-M series centrifugal extractor and others?
Right now, most centrifugal extractor in the market are traditional annular centrifugal extractor, CWL-M centrifugal extractor are our forth generation product(patent ZL2014205865573) and have advantage such as no bottom bearing and seal, no leakage risk, free maintenance; more energy saving, only 1/3~1/10 power consumption of traditional equipment; our equipments’ material are perfluorinated polymer materials, corrosion resistance to strong sulfuric acid, hydrochloric acid, mixed acid.Applied to easily emulsifying system, mix thoroughly and high efficiency.
Q4: How do we choose suitable centrifugal extractor?
A: There are five issues that must be take seriously when election:
(1).Dimension and power
(2).Anti-corrosion property
(3).Anti-explosion property
(4).Equipment structure
(5).Environmental protection
(6) Price.
The main distinguish is property and configuration. Some extractor with heater or more control program. Sometimes spare parts cost is higher than main engine. When choose, except main engine, you should pay more attention on the rotor( quantity and species), the necessary material, bowl, wire structure and so on. All of these included are the complete price of full centrifugal extractor.
Q5: Are CWL-M series centrifugal extractor anti-explosion and automatic controlled?
We can equip related anti-explosion and automatic control function as per client necessary.
