Industrial furnace for heating products such as steel products

2:

• The industrial furnace according to claim 1, wherein the predetermined flow rate of recovery fumes received by each rotary regenerator is regulated a first regulator comprising a first valve mounted on the fourth duct of the rotary regenerator.

3:

• The industrial furnace according to claim 1, wherein the predetermined flow rate of supply air received by each rotary regenerator is regulated by a second regulator comprising a second valve mounted on the second duct of the rotary regenerator.

4:

• The industrial furnace according to claim 1, wherein, for each rotary regenerator, a flowmeter is mounted on the third duct of the rotary regenerator.

5:

• The industrial furnace according to claim 4, wherein at least one of the flowmeters is of the Venturi tube or Pitot tube or Vortex effect type flowmeter.

6:

• The industrial furnace according to claim 1, wherein, for each rotary regenerator, two disconnector valves are mounted on the third duct, and gas injection means are mounted on the third duct in order to fill the space between the two disconnector valves with inert gas.

7:

• The industrial furnace according to claim 6, wherein the injected gas is nitrogen.

8:

• The industrial furnace according to claim 1, wherein the recovery fumes are generated by a second combustion making it possible to finish off the first combustion performed by the burners.

9:

• The industrial furnace according to claim 8, wherein post-combustion air used for the second combustion comes in part from the preheated combustion air generated by at least one rotary regenerator.

10:

• The industrial furnace according to claim 1, wherein a ratio between the predetermined flow rate of supply air and the predetermined flow rate of recovery fumes lies in the range of 1 to 1.2.