Product Description Continuous Crystallizing Evaporator
(1) FORCED CIRCULATION TYPE EVAPORATIVE CRYSTALLIZER
It is a kind of crystal mush circulation type continuous
crystallizer. During the operation, the feed liquid is fed from the
bottom of the circulating tube. After mixed with crystal mush that
has left the bottom of the crystallizing chamber, it is sent to the
heating chamber by the pump. When crystal mush is heated (generally
2~6) in the heating chamber, no evaporation occurs. The hot crystal
mush will boil after it enters the crystallizing chamber, so that
the solution reaches the status of supersaturation. Then some
solute will deposit on the surface of suspended crystal grains to
make the crystal grow. The crystal mush as a product is discharged
from the top of the circulating tube. The forced circulation type
evaporative crystallizer has high production capacity, but the
granularity distribution of products is wider.
(2) DTB EVAPORATION CRYSTALLIZER
Also called diversion barrel-baffle evaporative crystallizer, it is
also a kind of crystal mush circulation type continuous
crystallizer. The crystallizer connects with the elutriating
cylinder at its bottom and is provided with the diversion barrel
and barrel-shaped baffle. During the operation, the hot saturated
liquid is continuously fed to the bottom of the circulating tube.
After mixed with stock solution containing small crystals in the
circulating tube, it is sent to the heater by the pump. The heated
solution flows into the crystallizer near the bottom of diversion
barrel, and is sent to the liquid surface along the diversion
barrel by the slowly rotated screw propeller. The solution is
evaporated and cooled on the liquid surface, reaching the status of
supersaturation. Some solute will deposit on the surface of
suspended grains to make the crystal grow.
There is a sedimentation area outside the annular baffle. Inside
the sedimentation area, the big grains settle, and the small grains
enter the circulating tube with the stock solution and are heated
and dissolved. The crystal enters the elutriating cylinder from the
bottom of the crystallizer. To make the granularity of crystallized
products as even as possible, some stock solution from the
sedimentation area are fed to the bottom of the elutriating
cylinder. By using the effect of hydraulic classification, the
small grains will return to the crystallizer with the liquid and
the crystallized products will be discharged from the bottom of the
elutriating cylinder is constituted.
(3)Oslo EVAPORATIVE CRYSTALLIZER
Also called Krystal crystallizer, it is a kind of stock solution
circulation type continuous crystallizer. During the operation, the
feed liquid is fed into the circulating tube, mixed with the
circulating stock solution in the tube and sent to the heating
chamber by the pump. The heated solution is evaporated in the
evaporating chamber and reaches supersaturation. It will enter the
crystal fluidized bed under the evaporating chamber after passing
through the central tube. Inside the crystal fluidized bed, the
supersaturated solute in the solution will deposit on the surface
of suspended grains to make the crystal grow.
The crystal fluidized bed will
carry out hydraulic classification of the grains. The big grains
are at the bottom and the small grains are at the top. The
crystallized products with even granularity are discharged from the
bottom of the fluidized bed. The small grains in the fluidized bed
will flow into the circulating tube with the stock solution and
tiny crystal will be dissolved after reheating. If the heating
chamber of the Oslo evaporative crystallizer is replaced by the
cooling chamber, and the evaporating chamber is removed, the Oslo
cooling crystallizer is constituted.
