Crystallizers and their types Crystallizer is a machine that works on the solid-liquid separation technique of forming solid crystals from a liquid solution, with the help of crystallizer we convert waste water into solid crystals and clean water. Basically, a crystallizer eliminates liquid waste to create zero liquid discharge also known as ZLD. The whole process of crystallization is divided into two parts which is primary nucleation and secondary nucleation. The first part i.e. primary nucleation involves the growth of new crystals and the later part i.e. secondary nucleation perpetuates growth and it is the main stage that causes mass production of crystals. Our Cooling crystallizer works on crystallizers cooling method for converting liquid into crystals. Cooling Crystallizers are mainly divided into two types:
Vacuum Cooling Crystallizer Surface Cooling Crystallizer
Application Used for separation of Na₂SO₄, KCl, MgSO₄, Dextrose Monohydrate and Honey.
Crystallizers evaporative: This type of crystallizer works on crystallizer evaporative method for converting liquid into crystals. Crystallizers evaporative are mainly divided into three Types:
Type
Particle size Produced
Forced Circulation Crystallizers
0.2 – 0.8 mm
DTB (Draft Tube Baffle) Crystallizers
0.8 – 2.5 mm
OSLO Type Crystallizers
1.5 – 5.0 mm
Applications: NaCl, NH₄Cl, (NH₄) SO₄, Sucrose Waste water plants for chemicals / Pharmaceuticals Crystallizers Oslo Oslo type crystallizer is also called classified-suspension crystallizer. It is one of the oldest design developed for the production of large, coarse crystals. The basic design criteria are twofold:
It helps in desupersaturation of the mother liquor by contact with the largest crystals present in the crystallization chamber It helps in keeping most of the crystals in suspension without contact by a stirring device, thus enabling the production of large crystals of narrow size distribution
Typical products are:
(NH4)2 SO4 Na2SO4 AgNO3 hydrated mono sodium glutamate mono ammonium phosphate (MAP)
Crystallizers vacuum There are two types of vacuum crystallizer continuous and batch crystallizer. Vacuum crystallizers uses condenser with a booster for maintaining a vacuum inside the crystallizer body. This vacuum helps to generate a supersaturated solution when very low operating temperatures are required. Typical products are:
(NH4)2 SO4
For more information about thin film evaporators, visit our website: http://www.alaquainc.com