Drying Oven The drying process
Vacuum drying process is a complex, time-varying and non-linear industrial process. The drying control is the process parameter to adjust and control the whole drying process.
As the miniature of the constant progress of computer technology and automatic control technology and development, many areas of computer automatic detection and control technology is introduced, and the requirement of computer automatic measurement and control system is becoming more and more high, a variety of flexible configuration software arises at the historic moment. MCGS (Monitor and Control Generated System, general monitoring System) is a set of used to quickly build and generate the configuration software of computer monitoring and Control System, it can be based on Microsoft (various 32-bit Windows platform), based on the field data collection and processing, with animation display, vacuum drying, alarm processing, process Control, real time curve, history curve and report output and so on a variety of ways to provide solution to the problem of practical engineering, it makes full use of the Windows graphical function complete, good consistency, the characteristics of the yi-ology is easy to use interface, using the industrial Control System based on machine more than ever is versatile, has a wider application in the field of automation.
In the synthesis of many chemical and pharmaceutical products (intermediates or ultra - end products), solid particles are suspended in the liquid and need to be separated from the slurry at some stage. First, use mechanical solid-liquid separation equipment, such as filter centrifuge, vacuum (or pressure) filter, settler, filter press, static thickener, etc., to separate the solid from the liquid. In order to select the type of mechanical separation equipment for a certain process, the vacuum drying is determined by the solid properties, production capacity and operation mode. But usually only through a mechanical solid-liquid separation step cannot meet the product quality requirements, because the mechanical force alone cannot remove all liquids. According to the different products and equipment, the humidity of products discharged from the centrifuge or filter is generally within 5 %~ 80 % (weight) range. Therefore, after completing the separation of mechanical solid liquid, it is usually necessary to separate the residual liquid from the solid through the separation of heat and solid liquid. This step is usually called "drying".
An important driving force for the change of product drying effect is the evaporating temperature of the liquid containing liquid. The temperature of vacuum drying depends on the process pressure. Reducing the process pressure to reduce evaporation temperature can bring many benefits, especially for contact with drying. There is no need to design an ideal drying system that operates only under ultra-low pressure and high allowable temperatures, because it will require large and expensive peripherals. Department of a design into the adjustment of the pressure vessel. In other words, the condenser and vacuum device are suitable for high steam flow under high pressure, and the pressure decreases when the drying quantity decreases. Drying equipment is one of the most widely used units. It can be believed that the application of drying equipment has been applied to various departments of national production. For dry equipment, it is impossible to simply assume that it is simply a thermal physical method of dehydration. Because of the different kinds of materials treated in the drying process, different kinds of wet products and different indicators of products are also different. Different installation locations of the equipment have different requirements for the selection, equipment type, manufacturing and installation methods of the drying equipment. The correct handling of the above problems is one of the important factors of successful design of drying equipment.