Double cone rotary vacuum dryer is a new generation of drying equipment factory in the development of combination of technology, double cone rotary vacuum dryer is a set of drying equipment, mixing, vacuum drying in one, equipment is simple, convenient and double effect, a practical and economic, is difficult to substitute other equipment. SZG double cone rotary vacuum dryer with belt, chain two elastic connection, so the smooth operation of equipment. Special design of tooling, fully embodies the good two concentric shafts rotating joints, heat medium and vacuum system are reliable America technology. Double cone rotary vacuum dryer can be stepless speed regulation, but also can control the temperature. When the oil is heated, the double cone rotary vacuum dryer adopts automatic constant temperature control, can dry the biochemical products and mineral raw materials, temperature is between 20 ~ 160 ℃, temperature 2 ℃ ±. High thermal efficiency, increased more than 2 times than the general oven. Indirect heating, the material can not be polluted, conform to "GMP" standard. Double cone rotary vacuum dryer repair has the advantages of simple operation, easy to clean.
But in the drying speed of drying under different double cone rotary vacuum dryer and time is also a gap. Below we look at it what disadvantage.
Factors affecting the drying speed double cone rotary vacuum dryer is:
One is the dry material situation (such as material shape, size, stacking method), moisture content, density, viscosity and other properties of the material itself. In general, fine and uniform particles, piled up loosely, thin thickness, internal moisture easily spread. If raising the initial temperature, material by vacuum filtration pretreatment, reducing the material moisture content and so on, can improve the speed of vacuum drying.
Another is the vacuum degree is higher, more conducive to water at lower temperature vaporization, but vacuum through the Gogh Blize conduction, will affect the heating effect of the material. In order to improve the drying speed, should according to the material considering the characteristics of vacuum degree. Usually, the vacuum degree should not be less than 1 * 104Pa.
Double cone rotary vacuum dryer is used more widely raw material medicine production equipment, this is because in the process of vacuum drying, the cylinder pressure is always lower than the atmospheric pressure, less number of gas molecules, low density, low oxygen content, which can dry and easy oxidation changes of drug production, can reduce the material contamination opportunity. Because the water in the vaporization process, the temperature and pressure of the steam is directly proportional to the vacuum drying, the moisture in material can at low temperature vaporization, achieve low-temperature drying, especially suitable for heat sensitive materials in pharmaceutical production.
At the same time, vacuum drying can eliminate atmospheric hot air drying and easy to produce surface hardening phenomenon, this is between material vacuum drying and surface pressure, the pressure gradient effect, water quickly move to the surface, no surface hardening. In addition, vacuum drying, the material between the internal and external temperature gradient is small, the reverse osmosis the solvent alone could move and collection, overcome the phenomenon of hot air drying solvent separated from. |
