Regenerative burners furnace efficiency with

Radiant tubes are used in industry for heat treatment application in which products are treated under a protective gas atmosphere within the heat treatment furnaces. There are different radiant tubes with different geometries, burners, air preheating technologies, and materials on the market. In order to increase the efficiency of radiant tubes, plug in recuperators, and recuperative or regenerative burners will be used at radiant tubes to... 

Hg. 5.10. Continuous steel pusher reheat furnace side fired with regenerative burners in the top and bottom heat and preheat zones, and root tired in the soak zone. Preheat zones often have been designed as unfired preheat zones, which are good for fuel economy. However, also firing the preheat zones with regenerative burners would add capacity while retaining high fuel efficiency. (For a discussion of controls for this furnace, see sec. 6.11.1.)... 

Fig. 5.24. Batch furnace with one pair of regenerative burners. Recovery is so good that not all poc need to be sent through the air heater, leaving some to help control furnace pressure. For faster brlng-up from cold (when waste gas temperature is low and efficiency high), both burners can be fired simultaneously. After about 20 sec of firing as shown, the system automaticaiiy interchanges the left and right burner functions. (See aiso fig. 5.26.)...

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