THSQ Low-NOx Burners for Batch Annealing Furnaces
THSQ burners are specially designed for batch annealing furnaces, heat treatment furnaces and other special heat treatment applications.
Overview
THSQ burners are usually installed in batch annealing furnaces, heat treatment furnaces and the burner design are customizable for special applications. For reducing NOx emissions, combustion techniques such as air staging and fuel staging are used and, for particular applications, it is possible to use the flameless version for a substantial reduction of NOx emissions. The metallic head and flame tube determine a turbulent flue gases exit to obtain a strong recirculation inside the furnace chamber. The burner can be controlled both in proportional and in on-off mode. Electrode and UV sensor are respectively used for direct ignition and flame detection of the burner.
Technical Data
Main technical features:
- Low NOx
- Large turn-down
- Adaptability for special applications
- High turbulence of flue gases
- Electrode or UV flame dection
Fuels: Natural Gas, LPG (and hydrogen mixtures of them).
Turn down: 10%-100%.
Innovation
Temperature field from a CFD simulation of a THSQ burner installed in the annular gap of a batch annealing furnace.
Safety
Flame detection in flame mode via electrode or UV and other optical devices.
Environment
Low-NOx flame model: 150 mg/Nm3 for Natural Gas
Flameless version: 25 mg/Nm3 for Natural Gas
The emissions are referred to these operating conditions:
- Air excess 5%
- Air temperature ≤ 450°C
- Furnace temperature ≤ 1000°C
- Burner load ≥ 50%
The reported value is the expected one. The guaranteed value will be fixed case by case according to furnace type and working conditions
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