SYSTEM MANAGING AND CONTROL

The software for control system is developed in step7 language and it is installed on a SIMATIC PLC (200 or 300) .

Control program consists of these blocks:

• analogical signals acquiring (filtering and normlization)
• digital signals acquiring
• troubles managing 
• managing of:
  - automatic, manual and half-automatic  working mode
  - turning-on stage
  - automatic turning-off stage
  - regulation algorithms.

To make regulations, control system makes the following settings:

• MCS:  reference value for the speed of loading screw conveyor  
• MRC:  reference value for the rotation speed of the combustion chamber
• MVA:  reference value for the speed of the fan for auxiliary air into after-burner
• MVC:  reference value for the speed of the fan of the chimney
• B1:  flame enabling for the burner of the combustion chamber and position of the gpl - air throttle ( flame modulation when flame is enabled, air modulation in post-ventilation )
• flame enabling for the burner of the combustion chamber and position of the gpl - air throttle (only when flame is enabled)
• RSC:  position of throttle valve for cooling air modulation into heat exchanger for air-fumes before the reactor

Other measures that are useful for regulation:

• T3:  temperature into ash pit
• CO:  concentration of carbon monoxide into fumes that come out from after-burner
• MCS:  speed of loading screw conveyor
• MRC:  rotation speed of the combustion chamber
• MVA:  speed of the fan for auxiliary air

To get more information, look at  Regulation scheme