SINGHANIA (SSTPL) BURNERS
DESIGN :
SSTPL Swirl Flame multi-channel burners are engineered to deliver an optimum flame tailored to specific kiln requirements while maintaining low NOx emissions. The kiln burner operates on a staged combustion principle, where fuel and air are mixed progressively at defined stages to achieve controlled and efficient combustion. Adjustable front nozzle tips for axial and swirl air allow precise control of flame geometry according to customer needs.
This is achieved through a unique burner design that enables flame shaping during operation by varying air momentum through adjustments in the relative positions of the front nozzles. In conventional multi-channel burners, flame shape is mainly controlled by regulating air flow rates through axial, swirl, and other channels. However, mismatches between burner design and operating conditions often limit control once the primary air adjustment range is exhausted.
To overcome these limitations and achieve optimum flame momentum, SSTPL has developed a burner system that allows the desired nozzle tip velocities to be attained by adjusting the relative positions of the burner tips—even while the burner is in operation. The use of adjustable jack screws and flexible joints provides precise positioning control, offering operators unmatched ease and flexibility.
BURNER CONFIGURATION
Axial Air Stream
The axial air stream is discharged through multiple adjustable openings, generating high-velocity air jets that ensure perfect concentric alignment with the burner’s outer pipe. These jets promote strong recirculation of combustion gases with high CO₂ content back into the flame root, thereby lowering the local oxygen concentration.
Pulverized Coal / Pet Coke and/or Producer Gas Stream
Fuel is introduced between the two air streams—namely the Swirl Air Stream and the Axial Air Stream. As the fuel stream is sandwiched between these air flows during discharge, effective fuel–air mixing is achieved, supporting stable and efficient combustion.
Swirl Air Stream
The swirl air stream provides the rotational motion required to properly disperse coal particles or atomized oil. The swirl air nozzle is positioned behind the axial air nozzle, preventing excessive air expansion and allowing improved flame control and shaping.
Stabilizing Air Stream
The stabilizing air system incorporates a flame stabilizer that ensures recirculation of core eddies. This provides excellent flame root stability, even under low firing rates or during cold start-up conditions.
FLAME MOMENTUM
In modern burner technology, flame momentum is regarded as one of the most critical parameters for evaluating flame behavior and burner performance. SSTPL kiln burners operate with only 6% to 7% primary air while achieving flame momentum levels in the range of 1400 to 2500 m/s, resulting in optimal flame formation. High flame momentum burners are particularly well suited for white cement applications using fuels such as pet coke.
The high velocities generated within the burner create strong eddies due to localized pressure differentials caused by injection speeds. As a result, hot secondary air from the cooler is naturally drawn into the flame root, ensuring rapid fuel combustion along the coal discharge path and producing a short, narrow, and highly radiant flame.
Axial air nozzle areas feature a unique adjustment mechanism with position indicators across flexible joints, along with pressure gauges for each individual air stream. These features allow operators to fine-tune burner settings with high precision, ensuring stable and reliable kiln operation.
WHY SSTPL BURNERS?
+ Innovative design with adjustable air nozzle tips for precise flame shaping
+ Low primary air requirement (only 6%–7% of theoretical combustion air), enabling greater use of hot secondary air and reduced fuel consumption
+ Stable and well-defined flame front
+ Low NOx emissions
+ Capability to fire multiple fuels, including pulverized coal, petroleum coke, fuel oil, gas, agro-waste, oil sludge, or any combination thereof
+ Produces a short, narrow, uniform, and radiant flame for improved heat transfer to the material
+ Ensures a dense and stable coating in the burning zone
+ Fully compatible with alternative fuel firing
BURNER ACCESSORIES
• Motorized or manual overhead and ground-mounted burner trolleys
• Steam-, air-, or pressure-atomized oil burner guns
• LPG or natural gas–fired pilot burners
• PF / PHF units for start-up and oil firing
• Valve skids
• Fuel oil unloading and storage systems
• Primary air blowers
• Coal and pet coke storage and handling systems
• Flame safeguard and burner management system
APPLICATIONS
• Grey and white cement
• Lime calcination for paper industry applications
• Pelletizing of fines for steel plants
• Mineral processing, including bauxite, kyanite, magnesite, dolomite, alumina, etc.
• Abrasive-grade refractory materials
• Chemical processes involving sodium compounds, dichromate, titanium dioxide, and similar products
