Controllable air ducts for feeding of additional combustion air into the area of flue gas channels of coke oven chambers

A device for carbonization of coal in a horizontal coke oven chamber comprising:

• a horizontal coke oven chamber with openings in its upper part for admission of primary air by which part of the gases occurring during coal carbonization is burnt, and
• at least one flue gas channel closed towards the exterior which is located underneath the coke oven chamber floor which collect(s) partly burnt gases from the carbonization process and burn these completely with secondary air,
• the coke oven chamber includes downcomer channels for discharge of partly burnt gases from the carbonization process which are integrated in a lateral coke oven chamber wall or in a coke oven chamber door or in the coke cake, with these downcomer channels connecting the coke oven chamber interior with the at least one flue gas channel,
• secondary air ducts which are located underneath the at least one flue gas channel, said secondary air ducts being connected to atmospheric air and being vertically connected to the at least one flue gas channel by at least one vertical connecting channel and serving for admission of secondary air by which partly burnt gases from the carbonization process are completely burnt, and
• the at least one flue gas channel which is connected to a flue gas collecting pipe located outside the coke oven, said collecting pipe conducting the flue gases to the exterior atmosphere surrounding the coke oven,
• wherein
• the at least one vertical connecting channel between the at least one flue channel and the secondary air ducts is provided with a means for calibrating and regulating the secondary air between the at least one flue gas channel and secondary air duct by which the secondary air can be calibrated and regulated, and wherein
• the means for calibrating and regulating the secondary air allow a controlled secondary heating.