"People no perfect" double cone vacuum dryer also has shortcomings

Although the double cone vacuum dryer has the disadvantage of high cost. However, due to its excellent work efficiency, overall, double cone vacuum dryer because of its dry way advanced, wide range of applications, will be able to usher in an open market. This point in the current vacuum drying of traditional Chinese medicine is mainly used in more valuable drugs can be glimpse. Small and medium-sized enterprises in the downstream application of the equipment must be subject to capital affordability.
The main drawback of the double cone vacuum dryer is the need for a vacuum system capable of pumping steam, which makes the equipment investment cost high and the operation cost is high; the equipment production efficiency is low and the output is small. To overcome these shortcomings, many science and technology workers, made a lot of effort. At the same time, due to vacuum drying has many advantages, some products have to use vacuum dryer. Therefore, the double cone vacuum dryer although the investment costs slightly higher, but its development will be very promising.
Vacuum drying process is a complex, time-varying, non-linear industrial process, drying control is to adjust and control the process parameters affect the entire drying process.
In the synthesis of many chemical and pharmaceutical products (intermediates or final products), solid particles are suspended in the liquid and need to be separated from the slurry at a certain stage. The solids are first separated from the liquid using mechanical solid-liquid separation equipment such as a filter centrifuge, a vacuum (or pressure) filter, a settler, a filter press and a static thickener. For a certain process to choose the best type of mechanical separation equipment, vacuum dryer technology based on solid nature, capacity and mode of operation and other factors to decide. But usually only through a mechanical solid-liquid separation step can not meet the product quality requirements, because only by mechanical force can not remove all the liquid. Depending on the product and equipment, the humidity of the product discharged from the centrifuge or filter is generally in the range of 5% to 80% by weight. Therefore, after the completion of the mechanical solid-liquid separation, it is generally necessary to separate the liquid remaining in the solid by the thermoelectric solid-liquid separation step. This step is often referred to as "dry".
A significant driving force for the change in the drying effect of the double cone vacuum dryer is the evaporation temperature of the contained liquid. The temperature of the double cone vacuum dryer depends on the process pressure. Reducing the process pressure causes the evaporation temperature to drop, which can bring a lot of benefits, especially for contact drying. It is not necessary to design an ideal drying system that operates only at the lowest pressure and the maximum permissible temperature, as this will require large and expensive peripherals. The system is generally designed as a self-regulating pressure vessel. That is, the condenser and the vacuum device are suitable for handling the high steam flow at higher pressures and the pressure is reduced as the amount of drying decreases.