|Double cone rotating vacuum drying system is mainly composed by the double cone rotary vacuum dryer, condenser, dust collector, vacuum pumping systems, heating systems, cooling systems, electric control system, etc..
Dried pellets, the temperature is not too high, so the heating system, water heating is more suitable, cooling systems and water heating systems can share a group of water, in order to reduce the investment. If the moisture in the pellets is water, the device can not condenser; few Another example dust precipitator can use a buffer tank instead.
Double cone rotary vacuum dryer body, cone jacket outsourcing insulation layer to reduce the temperature of the room. The jacket of the heating water is first passed to heat the cylinder wall by the inner wall of heat transfer to give cylindrical wall in contact with the pellets, the wet steam generated by the vacuum pumping tube siphoned. Cones in while rotating the continuous tumbling of the pellets in the cylinder body, to obtain sufficient mixing, the material out of whether water is still very uniform color.
The drying of the pellets can be divided into four stages: the first stage is the initial stage, the material gradually warming, has not yet reached the vaporization temperature, the pellets surface water vaporization small, slow drying; When the material temperature reaches the vaporization temperature , referred to as "the second stage, the vaporization of water, drying speed, the temperature rise will become obvious, the degree of vacuum will fall. Strictly speaking, this stage of the vaporization temperature can not be a point, it should be said is a small range. Because the material is always in the heated state, vaporization will take a lot of heat, the two will cause temperature fluctuations, while the vaporization will cause a change in the degree of vacuum, the vacuum degree of the change in turn causes a change of the vaporization temperature, it is a dynamic process. If the vacuum gauge readings about 0.093Mpa fluctuations, the vaporization temperature fluctuates around 40 ℃; 3 stage becomes small pellets moisture to migrate to the surface of the water becomes less material temperature increases significantly, the degree of vacuum also picked up, drying speed is getting slower and slower; Stage 4, when the moisture content of the pellets reach the set requirements to cool down the material. Off the heating system, which leads to the tap water to the jacket, the cool-down process of the pellets, ready to discharge.
Double cone rotary vacuum dryer can be a combination of technology and vacuum technology new energy applications, it is both a series of advantages, and dried under vacuum to overcome the conventional vacuum drying cycle is long, low efficiency shortcomings in normal dry materials process, improve work efficiency than conventional methods 4 to 10 times. Dry high yield, good quality, low processing costs, double cone rotary vacuum dryer is a set of electronic science, vacuum science, mechanics, thermodynamics, programmed learning other subjects as one of the high-tech products, is in analysis of management changes seven advantages of the Matter in microwave vacuum drying equipment drying process, on the basis of in-depth study of the internal and external heat and mass transfer and moisture migration process under vacuum conditions, the development of a new technology, new technology. Industrial mass production, there are many items can not be carried out in the characteristics under conditions of high temperature of vacuum rake dryer drying process, for example, a conductive heat transfer vacuum dryer at pharmaceutical application of these drugs, chemical, nutritional foods and ginseng , velvet and other high-end Chinese herbal medicine materials, in order to ensure the quality of products, the drying process must be less than 100 ℃ or room temperature conditions, well-known air pressure decreases, the boiling point of water is also reduced, such as in an atmospheric pressure is under (101.3kpa), water a boiling point of 100 ° C under 0.073 atm (7.37kpa), the boiling point of water is 40 ° C. Under vacuum conditions, the heating of the objects to object internal moisture can be evaporated without heating state. As the air convective heat transfer under vacuum conditions difficult to only rely on heat conduction thermal vacuum dryer facing integration to enhance the technical management is the key to the material. Conventional vacuum drying method is slow, inefficient heat transfer and temperature control difficult. A radiant heating plus vacuum box dryer heat, easy to play a role in directly with the material, so that it is heated inside and outside at the same time, no need to transfer heat by convection or conduction, so fast heating, drying efficiency, temperature control . In developed countries began in the 1980s when the industrialized double cone rotary vacuum dryer development, and achieved good results in practical applications.
The advantages of the double cone rotary vacuum dryer
And efficient conventional vacuum dryer steam heating, heat from the inside to the outside, heated slowly takes a lot of coal, double cone rotary vacuum dryer uses electromagnetic waves heating, no heat transfer media, direct heating to the interior of the object, heating speed, and 1 kW in 3-5 minutes at room temperature under water plus a vacuum dryer facing integration enhance technical management is key-heated to 100 ° C, to avoid the above drawbacks, so fast, high efficiency drying cycles shorten, reduce energy consumption. Compared with conventional drying technology can improve the ergonomics more than four times.
2, double cone rotary vacuum drier heated uniformly since the heating from the inside to the outside of the material is heated at the same time, the temperature difference between the inside and outside of the material is very small, not produce conventional heating condition of the internal and external heating inconsistent, thereby generating the puffing effect , conducive crushed, dried quality greatly improved.
3, double cone rotary vacuum dryer is easy to control, to facilitate continuous production and automate power can be adjusted quickly and without inertia characteristics, easy-to-real-time control, the temperature can be adjusted between 40 ℃ -100 ℃.
4, double cone rotary vacuum dryer, small size, easy installation and maintenance
5 Double Cone Rotary Vacuum Dryer products of good quality, compared with the conventional method, the processing of the product quality has greatly improved.
6, double cone rotary vacuum dryer with disinfection and sterilization efficacy, product safety and health. Long shelf life.
7, double cone rotary vacuum dryer with significant economic benefits. From the above-described characteristics, energy conservation, energy, and improve product quality, a vacuum dryer sustainable development of safety and health, and low cost of investment in equipment aspects can be seen its economic and social benefits significantly.