Designed for Low Emissions
BHSL have recognised that in certain regions of the world the energy centre and combustion plant may be subject to strict environment emission limits.
The BHSL plant has been designed to meet the highest standards in emission control and will easily comply with the European limits set out in Regulation 592/2014.
Emission limit value (mg/Nm3)
|Nitrogen oxides (as NO2)||200|
Carbon Monoxide (CO) and Oxides of Nitrogen (NOx) are functions of combustion control and can thus be controlled by changes within the furnace; however, the generation of Sulphur Dioxide (SO2) and Hydrochloride (HCL) resulting from combustion are also related to the chemical composition of the fuel.
The selection, by BHSL, of fluidised bed combustion technology has ensured that SO2 and HCL gaseous emissions are significantly lower than those achievable by other technologies such as a moving grate system or suspension firing. The action of sand and ash particles during fuel combustion in low stoichiometric zones enhances capture of acid compounds, thus reducing harmful acid gases.
To abate the particulate (fine ash or dust) burden to a level of less than 10 mg/Nm3 (PM10), a Reverse Pulse Jet Fabric Filter is used. An instrument measures the pressure difference across the filters, signalling the requirement for the pneumatic pulse jet system to operate. The shock pulses, passing down through each bag, are sufficient to dislodge ash accumulated on the cloth media.