Radiant burner SINNOx with flue gas recirculation which used in conjunction with U-shape or W-shape radiant tube is a low NOx emissions burner independently developed by our company. There are single-stage recuperator, I-shape double-stage recuperator and L-shape double-stage recuperator with different heat exchange efficiencies can be selected.
This burner have been adopted in many galvanizing lines at home and abroad. The horizontal galvanizing line of a company in Indonesia has been put into production. This galvanizing line whose furnace temperature is up to 900℃ uses our single-stage recuperator and radiant tube burner SINNOx with flue gas recirculation, and also equipped with a solenoid butterfly valve on air pipeline, a slow opening solenoid valve on gas pipeline, and the ignition and detection is carried out through the burner controller SCU 2.2.
The components of flue gas is as follows:
| O2（%） | CO（ppm) | CO2(%) | NO(ppm) | NOx(ppm) | Flue gas temperature(℃) | Air temperature(℃) | Furnace temperature(℃) | NOx(ref. 8% O2)(mg/m3) |
| 4.7 | 0 | 9.24 | 51 | 54 | 486 | 538 | 914 | 43 |
| 4.2 | 3 | 9.52 | 46 | 48 | 624 | 524 | 914 | 37 |
| 4 | 0 | 9.63 | 38 | 40 | 585 | 533 | 914 | 31 |
| 3.7 | 5 | 9.8 | 48 | 50 | 547 | 614 | 914 | 38 |
| 4.4 | 5 | 9.41 | 58 | 61 | 589 | 560 | 914 | 48 |
| 4.4 | 5 | 9.41 | 41 | 43 | 646 | 588 | 914 | 34 |
| 4.3 | 5 | 9.46 | 44 | 46 | 571 | 580 | 914 | 36 |
| 3.6 | 5 | 9.86 | 54 | 57 | 624 | 596 | 907 | 43 |
Obviously, the burner SINNOx has high heat exchange efficiency, high air preheating temperature, and low NOx emissions no matter how hot the combustion air is.
