GB189827638A - Improvements in Steam Generating Apparatus. - Google Patents

Abstract

27,638. Paton, J. McC. C., and Alliott, J. B. Dec. 31. Feedwater, heating and supplying; steam receivers. -Relates to "thermal storage apparatus " of the kind described in Specifications No. 20,203, A.D. 1891, and No. 363, A.D. 1892, consisting of reservoirs in which steam and water are stored under conditions of temperature and pressure equal or approaching to those obtaining under light load conditions within the boiler, and from which, during periods of heavy load, water may be admitted to the boiler at such a temperature that it is readily converted into steam. According to the present improvements, the reservoirs are divided into upper and lower portions between which constant circulation is maintained, so that the greater part of the water may be stored at a low level, while feed may still take place by gravity, a more uniform temperature being also maintained. In Fig. 1, the reservoir 1 is shown with an annular upper portion 4 to which water withdrawn from the bottom by the pump 6 is discharged, and from which it may pass through the pipe 9 to the boilers shown on the left of the Figure. Steam enters and leaves the reservoir by the pipe 13, and cold water is delivered into it by the pipe 15, above the perforated diaphragm 14. Any surplus water delivered into the upper portion 4 overflows on to the perforated plate and falls through the steam to the bottom of the reservoir. In a modification, the pump 6 discharges into a second annular trough with a perforated bottom above the trough 4, so that the whole of the water falls in a shower through the steam space. In another modification, the water in the trough 4 is heated by steam which is delivered through a perforated ring, pipe, or the like immersed in it. The upper part of the reservoir may be entirely detached from the lower part as shown in Fig. 4.