METHOD AND DEVICE FOR HEATING FURNACE Russian patent published in 2021 - IPC F27B7/08 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for heating a furnace containing a heating zone, which is heated using a nozzle that creates flame passing in the longitudinal direction (D) and that is made with the possibility of supplying fuel and a primary oxidizer to it, while the nozzle is controlled to obtain quantitative ratio of supplied fuel and the primary oxidizer that provides combustion of less than 50% of supplied fuel using the primary oxidizer, while on each side of the specified furnace, a corresponding pair of tuyeres is located for a secondary oxidizer directed to the heating zone to supply the secondary oxidizer to the heating zone downstream from the specified nozzle, essentially parallel to a cross plane (C), and the temperature is measured downstream from the specified tuyeres, while each of the specified pairs of tuyeres contains low-speed first tuyere located upstream and high-speed second tuyere located downstream, wherein the amount of the secondary oxidizer supplied through the first tuyere is regulated so that to obtain homogenous horizontal temperature profile. A furnace made with the possibility of heating it by the mentioned heating method is also disclosed.

EFFECT: possibility of precise temperature adjustment in the longitudinal direction in the heating zone is provided with simultaneous provision of high efficiency in the heating zone and reduction in NO_x formation at relatively low costs.

15 cl, 4 dwg