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The spray drying is the technology widest used in the
liquid technology shaping and in the drying industry. The drying technology
is most suitable for producing the powder, particle or block solid
products from the materials, such as: solution, emulsion, soliquoid
and pumpable paste states, For this reason, when the particle size
and distribution of the final products, their residual water contents,
the stacking density and the
particle shape must meet the precision standard,
the spray drying is one of the most desired technologies.
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After the filtering and heating,
the air enters into the air distributor on the top of the drier. The
hot air enters into the drying room in the spiral form and uniformly.
By passing through the high-speed centrifugal spray on the top of
the tower, the material liquid will rotate and be sprayed into the
extremely fine mist liquid beads. Through the very short time of contacting
the heat air, the materials can be dried into the final products.
The final products will be discharged continuously from the bottom
of the drying tower and from the
whirl separator. The waste gas will be discharged from blower.
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At a high speed of drying, after the spraying of the
material liquid, the surface area of the material will be increased
greatly. In the hot-air flow,95%-98% of water can be evaporated at
a moment. The time of completing the drying needs only several seconds.
This is especially suitable for drying the heat sensitive materials.
Its final products own the good uniformity, mobility, dissolving capacity,
And the final products are high in their purity and good in their
quality. The production procedures are simple and the operation and
control are easy. The liquid with the moisture contents 40-60%(for
special materials, the contents may reach 90%).can be dried into the
powder or particle products once a time. After the drying, there is
no need for smashing and sorting, so as to reduce the operation procedures
in the production and to enhance the product purity. The product particle
diameters, looseness and water contents can be adjusted through changing
the operation condition in a certain scope. It is very convenient
to carry out the control and management.
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- Chemical Industry£º
Sodium fluoride(potassium),alkaline dyestuff and pigment,
dyestuff intermediate,compound fertilizer, formic silicic
acid,catalys,sulpuric acid agent, amino acid, white carbon
and so on.
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- Plastics and resin£º
AB£¬ABS emulsion, uric acid resin,phenolic aldehyde resin,
urea-formaldehyde resin, formaldehyde resin, polythene,
poly-chloroprene and etc.
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- Food Industry£º
Fatty milk powder, protein, cocoa milk powder, substitute
milk powder, egg white(yolk),food and plant, oats, chicken
juice, coffee, instant dissoluble tea, seasoning meat, protein,
soybean, peanut protein, hydrolysate and so forth.
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- Ceramic£º
aluminum oxide, ceramic tile material, magnesium oxide,
talcum and so on.
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- Materials that should be known before the
order
Particle liquid name and material property: solid contents(or water
contents),viscosity, surface tension and PH value.
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- Powder material contents after the drying, permissible residual water
contents, particle size, and permissible maximum temperature.
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- Output: shift time daily.
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- Energy that can be supplied: steam pressure supply capacity, electricty
capacity, fuel coal, oil and air capacity.
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- Control requirement: whether or not the inlet and outlet temperatures
should be controlled.
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- Powder collection requirement: whether or not the bag type collector
should be mounted and what is the requirement of the environment for
discharging the exhausted gas.
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- Other special requirements.
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Note: For the water evaporation contents, theatrical property,
the inlet and outlet tempratures, please see the following diagram for reference. |
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