Once Through Benson Boiler With Vertical Tube Furnace: Project Profile

Abstract:

<p>Mitsui Babcock will provide a new furnace to the Benson 'once through' design as a retrofit to a Chinese power plant. The existing unit is based on Chinese technology and has reached the end of its useful life. The new boiler furnace from Mitsui Babcock will correct short falls and ensure the unit is able to match the best world practice. The new equipment will result in an 11% increase in station output and a reduction in nitrogen oxide emissions by over one third.</p> <p>The principal aim of the project is to validate the performance of the Mitsui Babcock 'once through' vertical ribbed tube boiler technology. The specific objectives of the project are: <bl> <li>To design new boiler furnace envelope based on vertical ribbed tubes</li> <li>To establish steam measurement device suitable for utility boiler water walls</li> <li>To assess the new boiler performance incorporating vertical ribbed tubes</li> <li>To study oxide growth on the steam side of supercritical boilers in the laboratory</li> </bl></p> <p>This project will validate the Mitsui Babcock designs for the vertical ribbed tube 'once through' Benson boiler. An assessment of the existing Chinese boiler will address the existing performance of the small bore tubes employed in the furnace walls of the boiler and of the existing corner fired combustion arrangement.</p> <p>A detailed assessment of new boiler performance will be conducted. The new vertical ribbed boiler furnace tubes will be heavily instrumented and data recorded under different operating regimes (e.g. turndown) to establish the performance. Study tubes will be representative of the whole boiler geometry (e.g. corner, centre tubes etc). Data such as heat transfer, metal temperatures, water mass flux rates, water temperatures, location of boiling, steam temperature profile at the furnace wall outlet and individual tube flows etc will be established.</p> This profile contains information on the project's: <bl> <li>Objectives</li> <li>Summary</li> <li>Cost</li> <li>Duration</li> <li>Contractor</li> </bl>

Author(s):

DTI