. Transactions - American Society of Heating, Refrigerating and Air-Conditioning Engineers. ue, while air for the oven-heating flues is drawn in through theother main flue and checker-work chambers. The flow of gas and air isreversed at frequent intervals (usually at least twice per hour), thus allow-ing the incoming air to take up the heat absorbed by the checker brickfrom the waste gas. Coke Ovens and Their Relation to Fuel Supply, E. B. Elliott 285 Recuperative and regenerative types may have either horizontal orvertical flues for heating the oven chambers and the gas may pass throughthe fl
. Transactions - American Society of Heating, Refrigerating and Air-Conditioning Engineers. ue, while air for the oven-heating flues is drawn in through theother main flue and checker-work chambers. The flow of gas and air isreversed at frequent intervals (usually at least twice per hour), thus allow-ing the incoming air to take up the heat absorbed by the checker brickfrom the waste gas. Coke Ovens and Their Relation to Fuel Supply, E. B. Elliott 285 Recuperative and regenerative types may have either horizontal orvertical flues for heating the oven chambers and the gas may pass throughthe flues in either series or parallel paths. OPERATION OF BY-PRODUCT COKE OVENS Receiving and Unloading Coal.—Coal may be brought into the plantby rail or water. Rail coal may come in hopper-bottom cars from whichit may be dropped into track hoppers. The coal may be fed from thetrack hoppers onto a conveyor belt which may carry it to the coal prepara-tion plant or to storage. Rail coal may also be handled by means of acar dumper, which lifts the car bodily from the track and turns its con-. FIG. 4. VIEW OF COKE GUIDE AND QUENCHING CAR tents into a hopper. The coal from this hopper may be fed onto a con-veyor belt which may carry it to the preparation plant, or to storage, orit may be fed into a transfer car to be carried to storage. Coal brought to the Semet-Solvay plant by Great Lakes freighters,which have 6000 to 3 3,000 tons capacity, is usually lifted out of the shipshold with electrically-operated unloading towers. These towers havebeen built with a maximum capacity of 1000 tons per hour from boat tohopper on the unloader. From the hopper on the unloader, the coal isfed onto a conveyor belt, or into transfer cars to be taken to the coalpreparation plant, or to storage. Coal Storage.—Some plants store 200,000 or 300,000 tons of coal dur-ing the season of navigation on the lakes. Smaller plants store coal bydumping it from hopper-bottom cars spotted on a trestle. This coal ma
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