GB164991A - Improvements in regenerative furnaces - Google Patents

Abstract

164,991. Thompson, W. P., (Soc. Anon. Fours et ProcÚdÚs Mathy). Aug. 11, 1920. Gaseous-fuel furnaces.-In a regenerative furnace of the kind having gas and air supply ports and ports for the escape of combustion products arranged at each side of the working chamber, regenerators surmounted by three flues are arranged at each side of the furnace, one of the flues being employed for conveying combustion products from the working chamber to one or other of the regenerators, and the other two flues, for conveying air and gas to the burners. Valves are provided and may be operated so that, (1) flames issuing from the burners on one side of the working chamber pass to outlet flues on the opposite side, (2) flames issuing from the burners on one side of the working chamber escape through outlet flues on the same side, or (3) flames issuing simultaneously from burners on both sides of the working chamber escape through the outlet flues located on both sides. The course of the gases in the first of these methods nf operatinn is shown in Fig. 5. Reversing-valves 18, 20 control the admission of gas and air respectively to regenerators 9, 8. The heated gas and air pass through the open valves 7, 6 and gas and air heated conduits 4, 3 to the burners 12, and the combustion products escape through ports 15<1> to a conduit 2<1> part of the gases escaping to the regenerator 8<1> and the remaindere by way of a by-pass flue to the regenerator 9<1>. The gases leave the regenerators and escape to the chimney by way of the reversing- valves 18, 20. The second method of operation is shown in Fig. 7. The air only is preliminarily heated, gas being led directly into the flue 4, which is shut off from the chamber in which the valve 7 is located. Air passes through the reversing valve 18 to the regenerator 9 and thence through the port controlled by the valve 7 and port 26 to the flue 3 and burner 12. The combustion products escape through the ports located on the same side of the furnace and enter the flue 2, which is in communication with the regenerator 8. By opening the valves 6, 10 and closing the valves 5, 7 the air may be led through the regenerator 8 and combustion products through the regenerator 8. In the third method of operation of the furnace, the burners at both sides of the working chamber and the valves are operated in a similar manner to that described in connection with Fig. 7. The horizontal conduit of each burner 12 is of such a length that the hottest part of the flame is near the mouth of the burner.