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double cone rotary vacuum dryer in API production application

The importance of vacuum drying equipment in pharmaceutical industry is gradually increasing. In particular, the demand for large-scale equipment and functional combination equipment in vacuum freeze-drying equipment is increasing. Relevant enterprises should carry out comprehensive and multi-level energy-saving technology transformation to catch up with and surpass.


The double cone rotary vacuum dryer is a widely used equipment in the production of API. This is because in the process of vacuum drying, the pressure in the cylinder is always lower than the atmospheric pressure, the gas molecular number is small, the density is low, and the oxygen content is low. Therefore, it can dry the pharmaceutical production which is easy to change in oxidation and reduce the chances of material contamination. In the process of vaporization, the temperature of water is directly proportional to the steam pressure, so the water in the material can be vaporized at low temperature during vacuum drying to achieve low-temperature drying, which is especially suitable for the production of heat sensitive materials in drugs. At the same time, vacuum drying can eliminate the surface hardening phenomenon easily caused by atmospheric pressure hot air drying. This is due to the large pressure difference between the inside and the surface of vacuum drying materials. Under the effect of pressure gradient, the moisture will move to the surface quickly, and there will be no surface hardening. In addition, during vacuum drying, the temperature gradient between the inside and outside of the material is small, and the solvent can move and collect by itself due to reverse osmosis, which can effectively overcome the solvent dispersion phenomenon caused by hot air drying.


From the function point of view, the double cone rotary vacuum dryer is a kind of drying equipment which integrates mixing and vacuum drying. It is used as a classic equipment with the characteristics of simplicity, convenience and double effect. It has the practical and economic side, which is difficult to be replaced by other equipment.

vacuum dryer installation.jpg

The double cone rotary vacuum dryer is a double cone rotary tank body. In the vacuum state of the tank, steam or hot water is introduced into the jacket for heating. The heat is contacted with the wet material through the inner wall of the tank. The water vapor evaporated after the wet material absorbs heat is pumped away by the vacuum pump through the vacuum exhaust pipe. Due to the vacuum in the tank body, and the rotation of the tank makes the material constantly turn up and down inside and outside, so the drying speed of the material is accelerated, the drying efficiency is improved, and the purpose of uniform drying is achieved. The double cone rotary vacuum dryer system is mainly composed of double cone rotary vacuum dryer, condenser, dust collector, vacuum pumping system, heating system, cooling system, electric control system, etc.


The biconical rotary vacuum dryer provides a mild high flow mixing design for solid mixtures. When mixing at ratios up to 1:100000, reinforcing rods can be used to enhance the mixture, and solids / liquids in powder or granular form have different specific gravity. Due to the characteristic shape formed by the connection of two normally identical parts at a specific angle, axial flow is generated, in which the product to be mixed is separated and connected, and together with the radial action of the mixture, a fast and uniform mixture emission is generated.


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