Direct heating 

BSREC self recuperative burner in a direct heating system with an eductor for extracting the flue gases from the furnace. The eductor generates a vacuum with a centrally positioned nozzle and thus draws the flue gases out of the furnace chamber through the burner’s heat exchanger. The maximum achievable air preheat temperature amounts to approx. 700°C, depending on the application.

Indirect heating

The high outlet velocity of the combustion gases generates a pressure at the outlet of the ceramic burner tube, resulting in the recirculation of the flue gases.

This leads to the following:

- a reduction in NOx emissions,

- a uniform radiant tube temperature.

The hot flue gases are fed through the ceramic or metallic heat exchanger, heating the additional supply of cold combustion air flowing in the opposite direction. The maximum achievable air preheat temperature amounts to approx. 700°C, depending on the application.

The segmented flame tubes must be fitted in the single-ended (metallic or ceramic) radiant tube to guide the hot flue gases.