Emission Reduction and Control
With the ever more strict environmental regulations, BMA can help its clients in reducing their pollutant emissions, namely NOx, CO and particulate matter (PM). Why spend money on costly end-of-pipe environmental control systems when BMA can target emissions at the source – the combustion itself.
Sometimes, meeting the emission requirements for your process can be as simple as adjusting your operating procedures. BMA’s field experience and “know-how” in burner and boiler operation can give you the edge you need to meet these targets.
However, in some cases, there will be a need to upgrade or replace your combustion equipment. While this is a more expensive measure, you won’t leave it to chance if you put your trust in the hands of BMA’s experienced personnel. We have successfully overseen and supervised a vast number of burner replacements and modifications, always with the reduction of emissions in mind.
BMA is also a specialist in providing customized, integral low NOx systems by combining staged combustion with flue gas recirculation (FGR), the most cost-effective approach to NOx reduction on the market. BMA's solutions are achieved with the use of computational fluid dynamics (CFD) in order to simulate your boiler geometry to target and reduce the zones where NOx formation occurs, thus minimizing the creation of NOx in the first place. Whether you have a package boiler or an opposed, tangential, or front fired field-erected boiler, we can provide you with a tailor-made, low maintenance, guaranteed solution!
A few examples of how clients have benefited from our low-emission designs and expertise:
Particulate carryover reduction in an existing bark boiler
BMA conducted a series of projects for two 25 MW bark-fired thermal oil boilers for a fiberboard manufacturer, each boiler being equipped with Wellons cells in order to reduce the particulate carryover which was causing frequent shutdowns for cleaning of the convection tube banks. The work carried out began with a study to pinpoint the cause of the problem and provide solutions, and was followed by implementation of several recommendations. All the work on site, which mainly consisted of the modification of the air distribution to the Wellons combustor cells, as well as subsequent testing and optimization of the operating parameters was supervised by BMA (resulting in a significant reduction in carryover). The modifications resulted in a reduction in the frequency of shutdowns for cleaning of the convection tube banks.
NOx reduction in existing utility boiler
BMA supplied a customized NOx control system for an existing Borsig-Babcock, 300MW turbine output, opposed-fired utility boiler. The NOx control system consisted of 16 new dual-fired, low-NOx burners, flue gas recirculation (FGR) injection and over-fire air (OFA), retrofitted to the existing installation. The staged combustion provided by the OFA together with the FGR injection reduced the formation of NOx to achieve on average 32% of the non-controlled NOx emissions when firing either heavy oil, natural gas, or a combination of the two (mixed-firing). Computational fluid dynamics (CFD) was used to optimize the NOx control system in order to provide emission guarantees for NOx, particulates, and CO.
NOx reduction in new process steam boiler
BMA supplied a customized NOx control system for two new 80,000 kg/hr, tangentially-fired boilers for a brewery. The NOx control system consisted of four new dual-fired, low-NOx burners, flue gas recirculation (FGR) injection and over-fire air (OFA) for each boiler. In addition, the burners had provisions for burning biogas. The staged combustion provided by the OFA together with the FGR injection reduced the formation of NOx to achieve 42% of the non-controlled NOx emissions when firing heavy oil and 30% of the non-controlled NOx emissions when firing natural gas. Computational fluid dynamics (CFD) was used to optimize the NOx control system in order to provide emission guarantees for NOx, particulates, and CO.