GB313681A - Process and apparatus for the generation of steam - Google Patents

Abstract

313,681. Bartsch, A. April 2, 1928. Heating by direct contact of steam; water-tube boilers.-Water preheated under pressure in a tube system is atomized and mixed with superheated steam in a rotary evaporator thus generating further steam which is led off for use through a superheater. Water supplied by a pump 5 to preheating tubes 17 arranged around and above the furnace chamber 16 flows from a collector 14 through regulators 36, 37, 39 into a rotary evaporator 2 having ribs or vanes which draw steam from a superheater header 12 and mix it with the heated and sprayed water. Steam is led from the rotary evaporator into the distributing header 11 of the superheater 8, from which it passes through a further superheater 44 to the engine 1. Surplus steam passes off though a loaded valve 49 to a regenerative accumulator 48. The feed regulator 39 contains a piston 54 acted upon in one direction by the steam pressure and in the other direction by the feed supply pressure and the pressure of a spring 53. The movement of the piston controls the passage of water through openings in a surrounding sleeve. The sleeve may be moved by hand angularly to adjust the size of the water passage. The piston also operates through levers 55 the valves 58, 62, 63 controlling the supplies of fuel, air and steam respectively to a rotary mixer and atomizer 3 supplying fuel to the main burner 20. A pressure operated valve 36 cuts off the water supply when the pump pressure falls below the steam pressure, and upon a breakdown of the pump, a spring 65 operates the water return valve 37, the fuel return valve 66, and the air return valve 67. At starting, water is circulated by the pump 5 or by a hand pump 71 through the preheating tubes and back to the pump through the valve 37, and fuel is supplied to an auxiliary burner 29 by a hand pump 70 and air by an,auxiliary fan 6. A solid fuel furnace 32 may be used for starting in place of the burner 29. High pressure steam may be generated indirectly by the circulation of steam from the rotary evaporator through coils 73 in water drum 72. Uncondensed steam from the coils flows through a feed heater 74 of the high pressure generator and is led into a collector 75, from which it is drawn by the feed pump 5.