Programmable Controller Automatic Control System In The Conditioning Tower

This thesis introduced to basic concept of removed dust tecnology and in current cement profession widespread usaging electricity removed dust devices' basic construction and basic principle, and German Siemens S7-200 of basic construction.Detailed expatiate programmable controller in the wet tower auto-control system'application and software construction of the auto-control system-Moreover introduced to wet tower auto-control system' technique parameter and in the actual cement industry'application effect.In hardware electricity of the auto-control system detailed introduced composing of the water road and work principle, row put the smoke and dust's temperature examination and control,Defend to wear away quickly the thermocouple's adoption, and the exterior connect the connector.And give outed the diagram of internal hardware electricity principle.And in system software part, and give out maths modeland procedure, main procedure flow chart ;and Detailed expatiate sub procedure, break off procedure ;Moreover introduced the PLC ' programe software of STEP7-MCRO/ WIN.By use PLC ,system can complete function as follow:This auto-control system be applicable to the temperature and smoke and dust the deal the variety quick, control the process is difficult with the operation is;by the temperature controlor can automatically follow to the wet tower' exit temperature, error in the ?3 V including;by to automatically spray fog to lower the electric resistance, with the function for full the electricity equipment accepting the dust;Because of adopting feedback closed loop, and come to a to respond to the speed quick, constant temprature control the accuracy is high;Because of adopting the sensors, and make the system circumstance to leak water quick;system have many control parameter can set exit control temperature and adjust value low limit by key;can communication with remote computer and have remote control.