12.4 KHD Pyrojet Burner
Features: -
Swirl Air: -
- The tangential air flow generated by the swirl body results in negative pressure
near the burner mouth. - Hot gases from the kiln are sucked into the flame.
- Part of Thermal NOx formed will break down in to free N2 by internal
recirculation of flue gases, as a result of the swirl air emerging from the inner
part of the burner. - The swirl has a stabilizing effect on the flame in the burner axis.
Jet Air - The essential difference from Competitor`s burner lies in the patented construction
of the axial air jet system. - In PYRO-JET® burner, the axial air passes out of the outermost burner channel
throughseveral individual round nozzles distributed around the circumference.
Owing to theirhigh velocity, the resultant individual jet air streams draw-in the
slow-flowing but hotSecondary air from surroundings and lead to stable and
controlled ignition of fuel. - CFD studies shown that the secondary air absorption into flame is nearly
25% within first 2 meters of flame length due to jet streams high velocity and
uniform spacing between jet air nozzles in comparison to 8% with burners
having single primary air exit. - The axial air also ensures cooling of the burner outer pipe.
- Axis air flow from circular jet air nozzles gives uniform flow
- Swirl air flow from rectangular air nozzles gives uniform flow
- Flame shape and momentum is easily controlled by PA pressure and flow
- Separate blowers are required for axial and swirl air
- PA require for Petcoke is 6.4 %, conveying air is 2.78 % total PA is 9.18 %
- Pyrojet burner has central coal pipe design, it is very easy to change the internal
coal pipe from the burner and change the fuel from coal to petcoke.
Benefits of Pyrojet Burner - High reliability /availability
- High solid fuel and liquid fuel flexibility
- Easier operation
- Handles variation in fuel quality
- Improved clinker quality
- Lower PA leading to reduction in fuel consumption and power consumption
- Lower NOx generation