1006 



[RON 



Fig. 1267 is a longitudinal section at A, n, c, n (fig. 1268). 



Fig. 1268 is a sectional plan at i.. M (fig. 1267). 



The peculiarity of the regenerative gas-furnace, as applied either to puddling, or tc 

 any other process in which a high heat is required, consists in the utilisation in the 

 furnace of nearly the whole of the heat of combustion of the fuel, by heating the 

 entering gas and air by means of the waste heat of the products of combustion, after 

 they have left the furnace, and are of no further use for the operation being carried 

 on. The waste heat is, so to speak, intercepted on its passage to the chimney, by 

 means of masses of fire-brick stacked in an open or loose manner in certain chambers, 

 called ' regenerator chambers,' c, E, E', c 1 (fig. 1267). 



On first lighting the furnace the gas passes in through the gas regulating valve, n 

 (fig. 1266), and the gas reversing valve, B 1 , and is led into the flue, M, and thence into 

 the bottom of the regenerator chamber, c (fig. 1267) ; while the air enters through a 

 corresponding ' air reversing valve,' behind the valve B 1 , and passes thence through 

 the flue, N, into the regenerator chamber, E. The currents of gas and air, both quite 



1267 



n Tin. -I ! i ' 



1268 



cold, rise separately through the regenerator chambers, c and E, and pass up through 

 the flues, o, o, and F, r, F (fig. 1268), respectively, into the furnace above, where they 

 meet and are lighted, burning and producing a moderate heat. The products of com- 

 bustion pass away through a similar set of flues at the other end of the furnace into 

 the regenerator chambers, c 1 , E 1 , and thence through the flues, M 1 , N 1 , and through the 

 gas and air reversing valves, into the chimney flue, o. The waste heat is thus de- 

 posited in the upper courses of open fire-brick work filling the chambers, c 1 , B 1 , so 

 heating them up, while the lower portion, and the chimney flue, are still quite cool ; 

 then, after about an hour, the reversing valves, B 1 (through which the air and gas are 

 admitted to the furnace), are reversed, by means of the levers, p, and the air and gas 

 enter, through those regenerator chambers, E 1 , c 1 , that have just been heated by the 

 waste products of combustion, and in passing up through the open brickwork they 

 become heated, and then on meeting and entering into combustion in the furnace, D, D, 

 they produce a very high temperature, probably 500 Fahr. higher than when ad- 

 mitted cold ; the waste heat from such higher temperature of combustion heating up 



