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pneumatic transport system
the main equipment is the down silo pump pneumatictransport plant; the performance can completely reflect nowadays pneumatictransport technology. The silo pump is featured in simple, compact and reasonableconfiguration, to adopt PLC to realize the automate control, it is features asfollows:Mechanical parts Thanks to the venturi ring-form air supplementary apparatus, which helps a lot forform more harmonious, more smooth conveying. The conveying pressure is low than0.25MPa.Electric control part Control mode: modular PLC is applied, PLC is procured from Germany SIEMENS Company,which could be replaced or expanded easily, and sufficient space has been reservedfor modification and supplement. Liquid water of Interface device by the productof Germany Siemens Company will be applied, which not only is easy to operate,but also profit the environment. Operation mode: Operation mode could be switched between auto-operation and manual-operation. Forauto-operation, only "start" button should be pressed, then the system will comeinto normal operation procedure automatically, all the work conditions will bereflected on the operational panel. Manual operation could be performed on thespot. Auto-control and manual-control will be interlocked. Control system For the conveying system, there installed monitoring instruments, warning displayand protection measures to supervise/control. The pressure of compressed air,main valves, motors, and pressure along conveying pipe by receiving and sendingsignals to the control system. For some other objects, which have no reactive signals,all the control will be realized by logical programmer. Malfunctions and failureswill be displayed on the panel, accompanied by sound warning. Conveyor will shift automatically to manual operation when failure occurs to beconvenient for servicing and without affect the normal operation of the system.In order to prevent blocking of conveying material, post-purging procedure willbe done just before the conveying is about to end. During the normal operationof the system, if blocking trend is detected, then the logical programmer will beshifted to safeguard process from subroutine immediately to mitigate the blocking.If power supply for the system is cut by accident, when re-electrified, the systemcould ensure all executive objects are in stand by status, which could preventto start the system by accident.
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Pneumatic Transport System