ACE Control Systems (digester

ANDRITZ Digester ACE is a control optimization system powered by BrainWave that stabilizes chip bin, digester level, kappa, white liquor temperatures, and the effective alkali to improve digester operations.

ACE starts by closing loops and stabilizing operations with the patented BrainWave controller. After BrainWave has stabilized the process, ACE is then implemented as a supervisory layer. ACE determines the upper and lower cook zone, cold blow dilution targets, and extraction flow targets to maintain the proper Lo-Solids cooking process conditions for these two cook zones. ACE controls the targets for the heating zone between the CD1 and CD2 screens and monitors the status of the CD1, CD2, and CD3 extraction screens and the in-line drainer. If any of these differential pressures are deemed to be high, ACE will take steps to lower them by managing targets around the digester.