Boiler sootblowing manager

The Valmet DNA Boiler Sootblowing Manager (DNA Sootblowing Manager) calculates, stores and displays the boiler heat transfer characteristics that indicate fouling and deposit accumulation on heat transfer surfaces. It also defines the economically optimal sootblowing sequence. These values can be used both to short and long term monitoring thus helping to detect gradual changes in boiler heat transfer and to optimize sootblowing.

Features

The application includes calculation of the following heat transfer characteristics for each heat transfer surface:

  • Actual heat transfer rate (steam/water side) [MW]
  • Actual heat transfer coefficient [kW/K]
  • Load-compensated heat transfer coefficient [kW/K]
  • Reference heat transfer coefficient after sootblowing [kW/K]
  • Reference heat transfer coefficient before sootblowing [kW/K]
  • Extra fuel consumption due to fouling [MW]

The optimization procedure can be executed either separately or as one unity for all the surfaces, producing the following variables:

  • Optimal sootblowing sequence [h]
  • Actual, realized sootblowing sequence [h]
  • Cumulative fuel energy loss due to fouling [MWh]
  • Cost saving potential [MWh/h]

Benefits

DNA Sootblowing Manager helps the plant personnel to avoid unplanned shutdowns by regular monitoring of the heat transfer coefficients, comparison to previous years and changing the sootblowing sequence and target when needed. The starting levels of the heat transfer coefficients in the beginning of operating seasons also indicate the success of washing of surfaces during maintenance stoppage. This data can be used to improve the washing methods and to shorten the duration of the maintenance.

Performance monitoring and reporting

Valmet DNA monitoring and reporting solutions are designed to assist in all areas of power plant operation - from management to production and maintenance.