Crystallizer with Flow tube and the baffle.Flow Tube in the English language, is Draft Tubeit with the three English capital words called" DTB" crystallizer, it is a typical modern industrial continuous crystallizer, most widespread used, either vacuum evaporation, or vacuum flash cooling, it is the best continuous crystallizing evaporator.Crystal grain size is bigger than the FC type, particle size in 0.2-1.2 mm, particle uniformity, smooth surface, different products, different crystal shape characteristics, but a certain range, the particle size can be adjusted, this is the biggest feature of "DTB crystallizer.Type "DTB crystallizer structure design is more complicated.Vacuum evaporation with heating chamber and condensing bucket.Only evaporation crystallization, vacuum flash cooling design according to the evaporation, crystallization, mother liquor area to design the subsidence area different settling velocity, and the diameter of the crystallizer is calculated.The settling velocity and due to the nature of crystalline material.Flow tube rise generally, speed of 1 m/s, or less evaporation chamber sedimentation velocity 0.2 m/s, or less crystalline region sedimentation velocity 0.1 m/s or less, mother liquor area of 0.05 m/s or less.The design of the vertical axial flow pump is the key to "DTB crystallizer, it belongs to the large capacity, low head, low speed, the particularity of large axial flow pump impeller diameter.It is the "heart" of the mould, often the size of crystal grain size has close relationship with its design.
Composition:
It consists of heating room, evaporation crystallization room, circulating pump, vertical axial flow pump, crystallization and evaporation area, mother liquor (panel).
Use scope:
Suitable for ammonium chloride, styrene acrylic acid, sodium sulfate, ammonium chloride, ammonium acid;Barium chloride, zinc sulfate, calcium chloride, ammonium sulfate,Sodium hydroxide or other materials of evaporation and crystallization.