GB736947A - Steam boiler heated by the exhaust gases of internal combustion engines - Google Patents

Abstract

736,947. Heating water-tube steam boilers by waste gases. MAK MASCHINENBAU KIEL AKT.-GES. Dec. 21, 1953 [Jan. 29, 1953], No. 35469/53. Class 123 (2). A water-tube steam boiler heated by exhaust gases from an internal-combustion engine comprises upper and lower tube plates 6, 8 to which are respectively bolted covers 4, 7 enclosing respectively a steam collector chamber 1 and a water receiver chamber 2, the chambers being connected externally by a valved downcomer pipe 17 and by a bank of vertical water tubes 3 which extend between the tube plates. The tube bank is encased by insulated plates 11-14, plate 13 being formed with a central opening through the upper half of which the exhaust gases enter the boiler at 20, the gases flowing horizontally through the tube bank above a guide plate 15 and returning under the plate to discharge at 22 through the lower half of the opening. A rotatable damper 18, the setting of which may be regulated automatically by means responsive to variations in steam output or pressure, is disposed between the gas inlet and outlet ports to control the volume of gas entering the boiler. Thus, for example, if the boiler pressure rises the damper is turned towards its closed position to decrease the flow of gas into the boiler and at the same time provide a by-pass for the surplus gas, as indicated at 19. Chambers 1, 2 are provided with anti-surge baffles 9, 10 when the boiler is to be fitted to a vehicle. A tubular heat exchanger 16 for preheating the feed water by means of the engine cooling water is disposed in the lower part of chamber 2.