Process Control Services

Tune up your PID controls, implement multivariate constraint controls or analyse your existing control configuration for opportunities.

In 10 years of practicing process control in the chemical process industries, Dan Yuen has implemented all types of control technologies from simple feedback controllers (PID) to advanced multivariate constraint optimizing controllers.

Dan has notable expertise is the use of statistical process control techniques in real-time control applied to polymer reactor processes and in inferential controls.

Control Technologies

PID (DCS) controller programming, configuration and tuning
Statistical process control (SPC): shewhart charts, online cusum filters
Model identification using plant tests and statistical time series analysis (Box-Jenkins)
Process Simulators: PDPlus
Implmenting multivariate constraint controllers: AspenTech's DMC and OPC, Honeywell's RMPCT
Online process properties estimators
Programming in Visual Basic, Fortran, Dowtran, Pascal on PC's and VAX VMS
Honeywell's TRAINER process operator training simulator
DCS configuration: Foxboro I/A, Yokogawa Centum CS
PLC's, SCADA systems

Process Operations

Dan has implemented advanced or regulatory process controls on the following process units.

Fluidized Catalytic Cracking Unit (FCCU or "cat cracker") reactor
FCCU main fractionator distillation tower
Hydrogen plant
UNIPOL fluidized bed linear low-density polyethylene (LLDPE) polymer reactor
High pressure low-density (LDPE) polythylene tube reactor
Various oil refinery distillation towers
High-density polyethylene (HDPE) polymer slurry reactor
Low-density polyethylene (HDPE) polymer extruder