Methods of Optimizing Boiler Efficiency and Reducing NOx Emission
The article explores NOx pollution from fossil fuel combustion, advocating Flue Gas Recirculation (FGR) for up to 50% reduction. It highlights sources, FGR benefits, and
The article explores NOx pollution from fossil fuel combustion, advocating Flue Gas Recirculation (FGR) for up to 50% reduction. It highlights sources, FGR benefits, and
During the last century, Nitrogen oxide emissions, called NOx, have constantly been increasing. Due to the destructive effects of nitrogen oxides on the health of
The «furnace industry» and products determine the type of flame contact. In many heat treatment processes, where the combustion gases must not come into contact
The mechanical staging burners by raadman have a firing range from 1000 to 6200 kW, and they are manufactured by high quality electro-mechanical accessories which are easy to install and commission.
Thanks to the cam mechanism and butterfly valve, we have “Staging” operation in gas mode. In this type of burner, one actuator opens the damper and butterfly valve to reach the desired stages.
The components of these burners are as follows:
Mechanical components, burner head, flame tube, and cam mechanism, safety accessories, ignition devices, flame scanners, burner controllers such as Shokouh/Honeywell TMG or Siemens LFL, burner actuators, accessories of power system, ventilation motor, fan wheel, safety devices, and air pressure switches.
Raadman gas and dual fuel burners are suitable for the following utilization.
The following methods of regulation are available for RGB-MC and RLGB-MC Series burners:
Designed in accordance with ISIRI-7595 and ISIRI-7594 Iran national standards (equal to the BS-EN676, and BS-EN267 European standards).
Air humidity: max. 80 % relative humidity, no condensation.
The combustion air must be free of aggressive substances (halogens, chlorides, etc.) and impurities (dust, debris, vapors, etc.).
The emissions have been measured in various models at the maximum output, according to DIN-EN 676 and DIN-EN 297 standards.
The values of CO and NOx during burner operation are lower than 30 and 120 mg/kWh at 20 % excess of air for normal versions and, lower than 20 and 80 mg/kWh for Low NOx versions (LN series). Consequently, the burner’s NOx class of II and III is reported and being approved for normal version and LN Versions respectively.
LN versions (Low Nox Burners) have a higher rate of mixing during their operation. This results in a further decrease in the flame length and an increase in the flame diameter.
The following diagram shows the flame diameters, which have a significant impact on the burner efficiency and their compliance with the boiler combustion chamber geometry.
The Raadman burners can be appropriately selected for all boilers which are designed according to the BS-2790, BS-855, EN-303, and BS-EN 12953-3. A flame should, at its highest output, fill 90% of combustion chambers.
PACKMAN Company was established in February, 1975. The company has started its activity in the field of producing High-Pressure Vessels such as Hot-Water Boilers, Steam Boilers, Pool Coil Tanks, Softeners and Heat Exchangers since 1984.
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