In part 1 on this topic we presented basic principles of combustion and air system design to show potential benefits of an overfire air (OFA) upgrade. In Part 2 we present data from several of Jansen’s recent OFA upgrades to show measurable reductions in carbon monoxide (CO) emissions. To review,
Operating with an effective overfire air (OFA) system is key to optimizing the combustion process in a biomass boiler and reducing its carbon monoxide (CO) emissions. This post will discuss the basics of combustion optimization and OFA system design. Part 2 will focus on the measured reductions in CO from
When maximizing boiler performance, the main hindrance can often be within the boiler backpasses. Over time, the economizer, tubular air heater (TAH), dust collector, and other backend equipment can erode, corrode, exhibit air in-leakage or have other performance issues that negatively impact the efficiency of the boiler. One common issue
A result of poor superheater design (Photo1). Superheaters in power generating boilers play a critical role in sustaining maximized power generation and overall boiler performance. Superheater design not only impacts the final steam temperature but also the expected steam drum pressure, the potential for elevated tube temperatures, corrosion and erosion
A growing trend for kraft paper mills is to use an existing power or recovery boiler for destroying noncondensable gas (NCG) and stripper off-gas (SOG.) This is a viable alternative to burning them in the lime kiln (where it can cause production problems) or in a dedicated incinerator. The effectiveness
Senior Process Engineer Steve Campbell using portable test equipment at the ESP inlet. Even a well-maintained and modern boiler equipped with advanced controls and instrumentation can operate inefficiently if these controls are not effectively used. In addition, combustion conditions in boiler furnaces are constantly changing, so it is important to
