Patent ID: 8419423

Claim:
Air heater, containing shell ( 1 ) with brick-lining ( 2 ), checkerwork ( 3 ), dome ( 5 ), hot blast connecting pipe ( 4 ) located above checkerwork ( 3 ) on distance up to its axis not less of one diameter of its flow area section, prechamber ( 6 ), located in the top part of the dome ( 5 ) coaxially with it and having shell ( 7 ) with brick-lining ( 8 ), executed independently of dome brick-lining with an independent support ( 9 ) on the prechamber shell, gas ( 14 ) and air ( 15 ) collectors with a separating wall ( 13 ) between them, located between shell ( 7 ) and the side wall of prechamber brick-lining ( 10 ) one above another and having inlet connecting pipes ( 16 , 17 ) and the outlet channels ( 11 , 12 ) executed in the vertical side wall of prechamber brick-lining ( 10 ), differing that outlet channels ( 12 ) of bottom collectors ( 15 ) are located in its top part and directed upwards from the horizontal plane at the angle of 15-30 degrees, and outlet channels ( 11 ) are located in its bottom part and directed downwards from the horizontal plane at the angle of 15-30 degrees, projections of axes of the specified channels to the horizontal plane form an angle of 15-45 degrees to projections to the horizontal plane of prechamber radiuses, passing through the center of outlet sections of channels ( 11 , 12 ).