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| ≡ Membrane desicator
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>>>>Present
page：Membrane desicator |
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Vertical
membrane desicator ： |
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 ● Operation
principle :
Membrane desicator, mainly by blow mechanical
force of slice produce one strong a layer of liquid
film of turbulance it (Fig. 1) ．
This dry technology is setting up on WFE foundation
of shaving the membrane evaporimeter , with engaged
in the experience of dry technology for a long
timing; WFD desicator can work in heating temperature
from- 20-1100 degrees Centigrade, working pressure
0. 01-30bar, the range from second to hour in
the time of staying ．
Fig. 2 is the vertical membrane desicator ,
it shaves one slice of rotors etc. to make up
from what has been taken outside to heat the vertical
round barrel which inserts set , swing from side
to side. This is it blow slice from insert sets
of wet supplies that top enter distribute to heat
surface to swing, this thickness of layer of liquid
is decided by and shaved one and interval between
the barrels, is swinging forming a very strong
vortex above of the blade, turbulance this strengthen
liquid film heat transfer on heating surface,
among this course, this light to give copy evaporation
form two steam been the external condenser successively,
powder that freedom flows left the desicator through
a proper systematic spacer assembly 。
For prevent material liquid from heat surface
form dirt , this is it blow slices of high guard
station become and heat Taxi interval 1mm to swing,
liquid film layer can smaller than 1mm thickness
in this way, but to heat surface have clean function
since 。
Usually, the dry course of the membrane desicator
can divide into three areas : Preheating area
, condensing area , dry district ；
The preheating area, the supplies reach the
boiling point begin to evaporate, the solid take
shape tentatively 。
Condensing area: The solid density increases,
tend to a stage of forming the group , a lot of
products are swung and shaved one to crush during
this time 。
The dry district at the end, the moisture (low
boiling thing ) volatilizes and finishes with
the dry course ；
The length of each area depends on the speed
of charge-in of the products and includes wet
quantity to a great extent, charge-in speed increase
person who preheat and is it increase to condense,
final result dry to is it is it include wet composition
increase finally to lead to the fact to reduce
。
It is heated that there are saturation steam
, heat conduction oil , far red dispatch from
foreign news agency to heat the medium ；
● Characteristic
1、 Time is short, it can be guaranteed to evaporate
slowly under the vacuum condition that this is
dry that the supplies are heated 。
2、 Operation airtight continuous, so without
concentrate loss pollute 。
3、 This shaves the membrane device and prevents
supplies lumping or structure in heating the surface
。
4、 The concentrate is transported and entered
a simple evaporation pot, during a single cycle
, the initial one is concentrated and had nothing
to do, the dry products can be produced, in this
passway of smooth forms 。
5、 Initial solution concentrate output , this
mean minimum residue amount of limit and reduce
and dump overcoats until solid material 。
● Apply to ：
1、 Dry dyestuffs and pigment growing , weed killer
, leaf and make the accomplishment of fungus yellowly
, to sour second ester of amino benzene ,etc.
；
2、 Retrieve solvents in the media of studying
in Conghua ；
3、 Deal with and dry life or industrial sewage
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