DP Advanced Automatic Control (DPAAC)

Automation addresses many of the common problems associated with high levels of operator control and intervention. Inconsistency in control parameters leads to boiler instability, temperature and steam flow fluctuations, and unplanned shutdowns. The inability to accurately respond to the fuel feeding and temperature requirements for different feedstocks leads to equipment bottlenecks fouling and reduced combustion capacity and inefficiency. Such inefficiencies can also results in higher and uncontrolled CO or NOx emissions.

Benefits Advantages and Benefits

Engineering DPAAC consists of the following components

Proprietary Control software Implemented through a combination of PID controllers, advanced structured programming language, fuzzy logic and process control software. Enabling hardware Encoded process controllers encoded with DPAAC control software ( Siemens SIMATIC S7 300 series controllers for its configuration simplicity; and the S7 400 unit for full redundancy). Secure networked communications (Ethernet, Profibus, RS485 and Modbus) DPAAC compatible with workstations using interactive Siemens WinCC HMI platform Field instruments to gather all process variables and operation input Key variables are fuel, combustion air, feed water, steam and flue gas. The main attributes measured are quantity, flow, temperature and pressure. Safety- instrumented devices to inform alarm, interlocking and protection functions.
Design parameter
The DP Advanced Automatic Control System (DPAAC) is designed
and engineered to meet the following requirements.
Automation 100% automatic operation of boiler and power plant processes.
Performance Advanced control functions to achieve stable boiler operation and higher efficiency.
Fuel flexibility Advanced sensors detect variations in fuel to automatically make adjustments which will maintain stable steam generation.
Safety Integrated boiler protection and Safety Instrumented Systems.
Fly Ash >1% of fuel amount