GB190521995A - Improvements in Introducing Water into Pressure Receptacles. - Google Patents

Abstract

21,995. Reeve, S. A. Oct. 28. Feed-water, supplying.-Relates more particularly to means for introducing feed-water into the boiler without the use of pumps. The invention is described as applied to the draining of apparatus in which steam is superheated by steam at a higher pressure and temperature. Fig. 1 shows the arrangement. The steam supply to an engine 12 from a low-pressure boiler 10 is superheated in a drum 13 containing a coil 14, through which highpressure steam from a boiler 15 is passed. Qondensed steam from the coil 14 passes by a pipe 18 to a return trap 19 and thence into a chamber 21 which communicates with the water and steam spaces respectively of the boiler 10 by branch pipes 23, 230. The chamber 21 contains a float-operated, valve 45 controlling the inlet of condensed steam from a separator 17. The discharge valve 36-of the return trap 19, Figs. 2 and 4, is controlled by a diaphragm 32, Fig. 3, to which it is connected by a tubular spindle 33. The upper side 30 of the diaphragm communicates with the low-pressure main 11 by a pipe 25 and with the valve chamber 35 by a pipe 44 and the spindle 33. The lower end of the spindle 33 has a lateral outlet 34, and the upper end forms -valve 42. A spring 40 tends to keep the valve 36 in the closed position. When the water accumulates sufficiently to close the opening 34, the space 30 is shut off and its pressure reduced by leakage past a valve 420 in the pipe 25. The diaphragm 32 then opens the valve 36 and allows the water to pass from the chamber 35 to the chamber 21. The pressure created in the chamber 21 closes the valve 45, and the water from both high and low pressure mains is returned to the boiler. When the chamber 21 has been cleared, the float descends and opens the valve 45. The feed-pipe 50, leading from the exhaust heater 52, is shown connected to the drain pipe 24. Any suitable form of trap may be substituted for the one described.