subject: Automatic Vacuum Dryer Track The Application In The Pharmaceutical Industry [print this page] Chinese extract commonly used in domestic enterprises are box-type drying equipment drying and spray drying. Box-type drying time is long, high energy consumption, intermittent operation, easy Bacterial contamination and moisture absorption; spray dried powder compact and poor water solubility, drying temperature, thermal sensitivity of the material can easily be destroyed, the high content of polysaccharide material will stick In the spray drying collector wall, causing difficulty in closing powder. In recent years, an automatic vacuum dryer start applications track production. Compared with the box-type drying, automatic vacuum dryer track advantages are: material thin, fast drying, the material heating time is short; materials crisp, easily crushed; isolated operation, to avoid contamination; dynamic operation, no scaling; continuous production , automatic control. Automatic vacuum dryer can be overcome, Tracked spray drying defects, compared with commonly used drying equipment, automatic vacuum dryer track better value, the control system using Siemens S7-200PLC, Siemens Inverter technology, the drying temperature, vacuum pressure, drying speed and stability, dry material moisture content and stability objectives, with favorable results.
1 works Screw into the material through the conversion of vacuum dryer under the conditions inside the coating material is continuously moving in slowly drying machine drying to bring the number to form a thin coating; drying belt speed motor drive to set the pace under the forward movement of each drying zone has the following 3 separate heating panels and a section of cooling plate, dry zone and the heating plates, cooling plates in close contact to contact with heat transfer ways of drying the energy needed to pass to bring materials; when dried material from the cylinder at one end to the other end of the campaign, the material has been dried and after cooling, the dried material stripped from the drying belt; materials crushed by a crushing device later, through the vacuum valve to the bucket in the material.
Material directly into the vacuum container through the dry particles from the flow of good, loose structure, instant good. The structure shown in Fig.1.
2 vacuum dryer automatically tracks the main features
2.1 vacuum tube is stainless steel with a diameter of nearly 2m cylinder, front door, length 15m, internal and external wall of polished, well-sealed tube. Crawler is a platform for drying materials, made of Teflon tape, the nature of stability, temperature range of -70-260 , safe for use in medicine, food industry. Tracked by 4 level settings of each track individually driven by frequency conversion motor, track velocity is adjusted by frequency control unit, speed range 0.15-1.5m/min.
2.2 Roots vacuum pump and vacuum system is composed of water ring vacuum pump unit.
2.3 before drying materials to increase the mobility of the first preheating, feed with a screw pump, capable of handling large viscosity (relative density of 1.35-1.45) in Chinese medicine extract; feed flow rate can be adjusted accurately, even in the Feed rate is small, the feeding device also ensures uniform cloth to dry and process optimization; each track with a separate screw feed pump as the feed rate of the general 20-50L / h. Swing Arm fabric through a stepper motor control, speed generally 5-20r/min.
2.4 automatic vacuum dryer the drying belt track is divided into four areas, three heating zones and one cooling zone. Unit heat with hot water, with full hot water heating system and cooling water circulation cooling system. Consider the natural heat-sensitive drugs, often by way of low-temperature vacuum drying, drying the product temperature is generally between 40-95 . After cooling, the material temperature can be controlled between 20-30 .
2.5 terminal block exports to the pneumatic vacuum valve to continuously exhaust vacuum dry material; a gate there is broken and granulation capabilities, dry powder particle size can be controlled between 40-60 head set.
2.6 unit is equipped with high pressure water cleaning device, consistent with the requirements of GMP and easy to clean.
Automatic Vacuum Dryer Track The Application In The Pharmaceutical Industry
