I. Description of LPG spray dryer:
LPG Centrifugal spray dryer is the widest used technology in the liquid shaping technology and in the drying industry. It is most suitable for producing powder, particle, or block solid products from materials of solution, emulsion, soliquoid and pumpable paste states. Therefore, when the particle size and distribution of the final products, their residual water contents, the stocking density and the particle shape meet the precision standards, the spray drying is one of the most desired technologies.
II. Features of LPG spray dryer:
1. High speed of drying. After the spraying of he 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.
2. It 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 purity and good in quality.
3. The production procedure is simple and the operational control is easy. The liquid with the moisture contents 40-60% (for special materials, the contents may reach 90%) can be dried into power or particle products once a time. After the drying, there is no need for smashing of sorting, so as to reduce the operation procedures in the production and enhance the 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.
Sketch of Flow Chart
III. Technical parameters of Spray dryer:
| Type | LPG | ||||||
| 5 | 25 | 50 | 100 | 150 | 200-3000 | ||
| Inlet temperature | ≤ 350°C | ||||||
| Outlet temperature | 80-90°C | ||||||
| Evaporate capacity (Kg/h) | 5 | 25 | 50 | 100 | 150 | 200-3000 | |
| Driving type | compressed air drive | mechanical drive | |||||
| Rotate speed | 25000 | 22000 | 21500 | 18000 | 18000 | 15000 | |
| Diameter of Atomizer tray (mm) | 50 | 120 | 120 | 120 | 150 | 180-340 | |
| Heating source | electricity | electricity | electricity +steam+fuel oil+coal gas | electricity +steam | electricity +steam+fuel oil+coal gas | To be solved by users | |
| Electric-heating power (KW) | 9 | 45 | 60 | 81 | 99 | ||
| Dried powder recovery rate (%) | ≥ 95 | ≥ 95 | ≥ 95 | ≥ 95 | ≥ 95 | ≥ 95 | |
Installation size | A(mm) | 1000 | 1290 | 1730 | 2500 | 2800 | According to practical needs |
| 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 |
Typical application
Foodstuff: Amino acid, vitamin, egg powder, bone powder, flavouring, protein, milk powder, blood powder, soy sauce powder, coffee, tea powder, glucose, pentadiene carboxylic acid, pectin, flavours, vegetable juice,yeast, starch, etc.
Ceramic: Alumina,zirconia,magnesium oxide, titania, pottery clay, china clay, all kingd of magnetic porcelain and metal-oxides, etc.
Chemical: Aluminium polychlorid, disperse dyes, reactive dyes, organic catalyzer, white carbon black, washing powder, zinc sulfate, silica, sodium metasilicate, potassium fluoride, calcium carbonate, potassium sulfate, ingotganic catalyzer and all kinds of waste liquid, etc.
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