Active Member
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[China]
Address: Jiaoxi Industry Zone,Zhenglu Town,Changzhou City,Jiangsu Province,China.
Contact name:Mrs. Saffi Wang
Changzhou yimin drying equipment Co.ltd. |
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mirror surface Milk powder fruit juice Spray dryer manufacture
Application
1. Spray dryer can be used for drying of ny substances both in
solution or in suspension.
2. Spray dryer are very useful for the drying of thermolabile
substances.
3. Citric acid, borax, sodium phosphate, hexamine, gelatine and
extracts are dried by a spray dryer.
4. The suspensions of starch, barium sulphate and calcium phosphate
are also dried by the spray dryer.
5. Milk, soap and detergents too are dried by a spray dryer.
Description
In the spray dryer the liquid to be dried is sprayed in the form of
mist. The minute droplets are readily evaporated and gets converted
in to the solid particles, which fall to the bottom of the chamber.
The vapours are transferred in to the separator where
the fine dry particles which are carried along with the vapours are
separated and collected. Spray dryers are available in many forms
and deigns.
A typical spray dryer consist of a drying chamber
which is just like the cyclone separator, so as to ensure the good
circulation of a air to facilaite heat and mass transfer and also
to ensure that the dried particles are separated by the centrifugal
action.
Features
1. This tendency of a liquid leadsto rise in the internal pressure
which causes the droplets to swell.
2. The shells thickness decreases where as permeability for vapour
increases.
3. If the shell is neither elastic nor permeable it ruputur and the
internal pressure escapes.
4. The temperature of the air is adjusted in such a way that the
droplets should be compeletly dried before reaching the walls of
the drying chamber.
5. The products should not be over heated at the same time.
Technical Parameters
| Specification | LPG5 | LPG25 | LPG50 | LPG100 | LPG150 | LPG200-3000 | ||
| Inlet temperature | ≤ 350°C | |||||||
| Outlet temperature | 80-90°C | |||||||
| Evaporating rate (kg/h) | 5 | 25 | 50 | 100 | 150 | 200-3000 | ||
| Rotating speed(rpm) | 25000 | 22000 | 21500 | 18000 | 18000 | 15000 | ||
| Dia. of atomizing tray(mm) | 50 | 120 | 120 | 120 | 150 | 180-340 | ||
| Heat source | Electricity | Electricity | Electricity+ steam, oil fuel, gas, or coal | |||||
| Electrical-heating power | 9 | 45 | 60 | 81 | 99 | ------------- | ||
| Dry powder Yield | ≥ 95 | |||||||
| A(mm) | 1000 | 1290 | 1730 | 2500 | 2800 | | |
| B(mm) | 2100 | 3410 | 4245 | 5300 | 6000 | |||
| C(mm) | 2300 | 4260 | 4645 | 6000 | 6700 | |||
| φ D(mm) | 1060 | 1800 | 2133 | 2560 | 2860 | |||
| E1(mm) | 1050 | 1200 | 1640 | 2100 | 2180 | |||
| E2(mm) | 1050 | 1200 | 1640 | 2100 | 2180 | |||
| F(mm) | 750 | 1000 | 1250 | 1750 | 1970 | |||
| G(mm) | 530 | 1700 | 1750 | 1930 | 2080 | |||
| H(mm) | 530 | 1300 | 1800 | 2600 | 3050 | |||
| I(mm) | 530 | 1550 | 1600 | 1780 | 1960 | |||
Spray Drying Stages
1. Atomizing: by atomizer, feed liquid is dispersed into even fog
drops.
2. Contact of fog drops and hot air: through air distributor, hot
air enters into drying chamber, fully mixing with fog drops and
moves at a certain rule(the contact way can be co-current flow,
adverse current, mixed flow)
3. Drying process: fog drops has big surface area, and appears
obvious ”grades” to hot air both in temperature and humidity, thus
strengthen the transmission process of “plastid caloric” moisture
of fog drops is evaporated very quick(within seconds to tens of
seconds)
