Application of double cone rotary vacuum dryer in practical production

The application of double cone rotary vacuum dryer in practical production the double cone rotary vacuum drying process is a complex, time-varying and non-linear industrial process The drying control is to adjust and control the process parameters that affect the whole drying process With the continuous progress and development of micro-computer technology and automatic control technology, computer automatic detection and control technology has been introduced in many fields, and the requirements for computer automatic measurement and control system are higher and higher, various flexible configuration software came into being MCGS (monitor and Control Generated System) is a set of configuration software used to quickly build and generate computer monitoring system, which can be based on Microsoft (various 32 Based on Windows platform, through the collection and processing of field data, it provides users with solutions to practical engineering problems in various ways such as animation display, vacuum drying alarm processing, process control, real-time curve, historical curve and report output It makes full use of the features of windows, such as complete graphics function, good interface consistency, easy to learn and use, and is more special than before The industrial control system developed by the computer is more universal and has a wider application in the field of automation In many synthesis processes of chemical and pharmaceutical products (intermediates or super final products), solid particles are suspended in the liquid and need to be separated from the slurry at a certain stage Firstly, mechanical solid-liquid separation equipment, such as filter centrifuge, vacuum (or pressure) filter, settler, filter press and static thickener, is used to separate the solid from the liquid In order to select the best type of mechanical separation equipment for a process, vacuum drying is mainly determined by solid properties, production capacity and operation mode However, it is usually impossible to achieve the product quality requirements only through one mechanical solid-liquid separation step, because it is impossible to remove all liquids only by mechanical force According to different products and equipment, the humidity of products discharged from centrifuge or filter is generally within the range of 5% - 80% (weight) Therefore, after the mechanical solid-liquid separation, it is generally necessary to separate the liquid remaining in the solid through the thermal solid-liquid separation step This step is often referred to as "drying." An important driving force to change the drying effect of the product is the evaporation temperature of the contained liquid, which depends on the process pressure Reducing the process pressure to reduce the evaporation temperature can bring many benefits, especially for contact drying There is no need to design an ideal drying system that can only operate at ultra-low pressure and ultra-high allowable temperature, because it will require large and expensive peripherals It is designed as a self regulating pressure vessel That is to say, the condenser and vacuum device are suitable for handling high steam flow under high pressure, and the pressure will be reduced when the drying amount is reduced.