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Large Spray Dryer Unit

Keywords: Spray Dryer Unit    Publish Time: 01-11-2011



I. Overview
 Spray drying is a liquid process shaping and drying industry's most widely used technology. Ideal for from the solution, emulsion, suspension and liquid pumpable paste material generated in the powder, granular solid product. So when the particle size distribution of the finished product, residual water content, bulk density and particle shape must meet precision standard spray drying is one of the most desired technologies.
Second, the principle
 Filtered and heated air into the hot air dryer at the top spiral distributor of air evenly into the drying chamber, liquid through the top of the tower of high-speed centrifugal atomizer (rotary) into a very fine mist spray liquid beads and hot air exposure, in a very short period of time can be dry for the finished product. Product continuously from the bottom of the drying tower and cyclones in the output waste gas by the fan vent.
Third, the characteristics
1. Fast drying, after the spraying of liquid in the hot air flow greatly increased surface area, the moment can be 95% -98% of evaporated water, only a few seconds to complete the drying time, especially for drying heat sensitive materials.
2. Product has a good uniformity, fluidity and solubility, high purity and good quality.
3. Production process is simplified, convenient control. The moisture content of 40-60% (90% subjects of special materials) of the liquid can be dried into a powder product, after drying without crushing and screening. Reduce the production processes, improve product purity, product size, bulk density, moisture within a certain range can be adjusted by changing the operating conditions of the control and management are very convenient.
Fourth, selection of specific parameters should be provided as follows:
1. The material name, state.
2. Production, processing liquid quantity, moisture content or solid content. Daily opening time.
3. Liquid feed moisture, specific gravity, viscosity, surface tension.
 4. Inlet air temperature, the product heat temperature.
5. Dry goods allowed water content, particle size.
6. Heating (electric heating, electric + steam hybrid heating, fuel, gas, thermal oil, coal heating, etc.).
7. Received powder requirements: The dust which method (dry or wet), environmental requirements.
8. Control requirements: general routine control, touch screen control or industrial computer control.
9. Other ancillary equipment.
10. Installation site conditions.