Biomass Combustion Optimization Using Solids and Air Flow Measurement

While accurately measuring the feed stock during combustion may seem impractical, especially since many feedstocks are byproducts of another process and are therefore inexpensive or even free, it is critical to the efficiency of the combustion process to accurately measure the feedstock being combusted. In fact, the very nature of these feedstocks as unused and unvalued byproducts of other processes, makes them much more difficult to measure accurately as they have exceptionally high product variability. One meter that is unaffected by extreme product variability is the CentriFlow Meter which, due to its extremely simple construction and unique Centripetal Force based measurement, is able to measure the flow of bulk solids independently of particle size, density, shape or even moisture content. Its unique design ensures that the same meter can be used to measure anything from powdered biomass to chunks of wood or construction debris.

While it is certainly critical to measure the feedstock during combustion, it is equally important to measure combustion air since proper air flow measurement is integral to the airflow control loop which aids in controlling the combustion process. Our unique velocity averaging VAP Pitots allow accurate air flow measurement in both clean air as well as particulate-laden air and, when combined with our unique flow conditioner, the High Beta, our air flow elements can accurately measure airflow in nearly any duct without the recommended straight runs that many other flow elements require.

When utilized in concert, accurate air flow and accurate solids flow measurement combine to create control over the combustion process. This control maximizes the efficiency of the boilers which will aid in reducing buildup and residue on the boiler tubes due to a cleaner, more efficient combustion, which will reduce cleaning and maintenance costs. Cleaner combustion will also result in fewer emissions, due to a cleaner and more efficient combustion, so that scrubbers and other injection systems often used to counteract harmful emissions can be reduced or even eliminated, thus increasing savings there as well.