double cone rotary vacuum dryer vacuum design
The double cone rotary vacuum dryer has outstanding performance. Different from the traditional process dryer, the working principle uses the power of vacuum, and the configuration of double cone drying tank will produce uniform drying effect on the articles in the tank. The double cone rotary vacuum dryer is mainly composed of double cone rotary vacuum dryer, condenser, dust collector, vacuum pumping system, heating system, cooling system, electric control system, etc. the heat transfer coefficient u of the jacket is independent of the operating pressure, and the viscosity of the material changes with its moisture content. The viscosity can make the materials agglomerate into blocks and adhere to the cylinder wall, which is easy to adhere to the dust collector and pipe wall after drying.
The pressure in the cylinder of the double cone rotary vacuum dryer 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 medicine which is easy to oxidize and reduce the chance of material contamination. The moisture content in the material can vaporize at low temperature, so it can dry at low temperature. It is especially suitable for the pharmaceutical production of heat sensitive materials. The temperature gradient between the inside and outside of the materials in the double cone rotary vacuum dryer is small. Due to the reverse osmosis, the moisture can move and collect independently, which can effectively overcome the loss phenomenon caused by hot air drying. Moreover, the rotation of the tank body makes the materials constantly flip up and down, so as to accelerate the drying speed of materials, improve the drying efficiency and achieve the purpose of uniform drying.
When drying goods, the double cone rotary vacuum dryer injects the hot water or steam into the tank of the double cone rotary vacuum dryer to make it fully contact. Then, under the dual effects of heat transfer and absorption evaporation, the moisture contained in the drying product absorbs the heat of the hot water or steam and converts it into water vapor, and then through the special device of the double cone rotary vacuum dryer The water vapor is precipitated, and then the double cone rotary vacuum dryer can continuously turn the drying products up and down when working, so it has the function of strengthening the working principle mentioned above and making the drying more efficient.
Strengthen the real super capacity of the innovative double cone rotary vacuum dryer, so that the moisture inside the material diffuses to the surface through the pressure difference or concentration difference. The water molecules (or other non condensable gases) gain enough kinetic energy on the material surface, and diffuse to the low-pressure space of the vacuum chamber after overcoming the mutual attraction between the molecules, so as to dry the easily oxidized drugs and reduce the chances of material contamination. The temperature gradient between the inside and outside of the materials in the double cone rotary vacuum dryer is small. Because of the reverse osmosis, the moisture can move and collect independently, which can effectively overcome the loss phenomenon caused by hot air drying. The heat transfer coefficient u of the jacket has nothing to do with the operating pressure. For non binding materials, u = 116 ~ 140W / (m · K), for cohesive materials, u = 80 ~ 93W / (m · K).
When the angle between the inclined surface and the bottom surface increases to a certain angle, the side material will slide downward.
In the double cone rotary vacuum dryer interlayer need to add some heat energy, and then its heat will pass through the inner shell of the materials that need to be dried. Under the action of power drive, the internal materials are continuously mixed, so as to achieve the purpose of drying. At this time, the material will be in a vacuum state, and then a lot of water will be formed under the air pressure, and then the moisture inside it will go through three processes: infiltration, evaporation and discharge.
The design of double cone rotary vacuum dryer is very advanced, its internal structure is also very simple, and then the operation is very simple. It can be used to reduce labor intensity, which can be used to improve the working environment. The double cone rotary vacuum dryer can greatly save the energy consumption during drying operation. On the one hand, it is due to its special internal structure, exquisite design scheme, and the remarkable improvement of heat transfer efficiency in the working principle, which makes the heat transfer coefficient burst and makes it have excellent performance in energy saving.