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SunkaierModel DTB -Industrial Crystallizer

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DTB crystallizer is for the production of  large-size crystalline materials such as ammonium sulfate, potassium chloride and diammonium phosphate.

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The Draft Tube Baffle Crystallizer (DTB) consists of five basic elements: 

  • Crystallizer vessel. 
  • Circulation pumping propeller
  • Baffles
  • The circulation pump. 
  • The heat exchanger. 

It is specially designed to produce coarse crystals with narrow size distribution. The DTB can produce large size particles (up to 3mm) due to its gentle agitation of growing crystals with very limited breakage. It has a controlled residence time for optimal growth and a long operating cycle with limited encrustations.

  • Low secondary nucleation due to low mechanical energy input (internal circulation)
  • Removing of fines (d < dcritical) from the internal baffle
  • Efficient fines destruction due to heating and/or dilution
  • Production of large size crystals (up to 3mm)
  • No or little heat make-up (fine dissolution)
  • Controlled residence time for optimal growth
  • Long operating cycle with limited encrustation
  • Appropriate for vacuum cooling (no external loop) and evaporative crystallization (moderate capacities)
  • Compact arrangement
Basic Principles of the DTB Crystallizer
  • Growing crystals are brought to the boiling surface where supersaturation is most intense, and growth is most rapid.
  • The baffle permits separation of unwanted fine crystals from the suspension of growing crystals, thereby affecting control of the product size.
  • Sufficient seed surface is maintained at the boiling surface to minimize harmful salt deposits on the equipment surfaces.
  • Low head loss in the internal circulation paths makes large flows at low power requirements feasible.

APPLICATION INDUSTRIES
Inorganic chemical
  • Ammonium sulfate, Nickel sulfate, Peroxodisulfuric sodium, Alum, potassium chloride Barium chloride, Sodium nitrate, Soda ash, Silver nitrate , Sodium hydrogen carbonate , Potassium carbonate, Sodium Phosphate, Boric acid, etc

Organic chemical
  • Bisphenol-A, Caprolactam, Acrylamide, Hydroquinone, Adipic acid, Ammonium adipic acid Fumaric acid, Trehalose, Aspartame, Amino acid, etc