GB243094A - Improvements in or relating to the feeding of steam boiler installations - Google Patents

Abstract

243,094. Siemens - Schuckertwerke Ges., and Stender, W. Aug. 30, 1924. Feed-water, heating.- In feed-water heating plant in which a part of the feed-watar is preheated by gases of combustion and another part by steam, the latter part passes to an accumulator from which it is fed to the boiler, whilst the former portion passes direct to the boiler or tc an economizer from which the boiler is fed. The feed-water is conveyed bv pumps 11, 21, Fig. 1, from a tank 3 to the boiler 1 either through the economizer 12 or through the steam feed-water heater 22 from which the water passes to an accumulator 23. The excess of steam over requirements, on the opening of the automatic valve 6, passes to the heater 22 by way of the pipe 15. The pump 21 can be regulated by the steam pressure in the pipe 5, and a pump 24 supplies the feed from the accumulator 24 to the boiler 1. In the event of the accumulator being emptied on account of excessive consumption of steam, the temperature regulating device which normally controls the pump 11 :s put out of action by the fall of a float 16 in the boiler and the full output of the pump is fed to the boiler. In a modification, the boiler fed by the economizer is separate from the boiler fed by the accumulator, and the two feed pipes are connected by a cross pipe. In another form, the high pressure boiler 10, Fig. 3, is fed by the pump 31 partly with water from a low pressure boiler 1 fed by the economizer 12, and partly with warm water from the accumulator 23, the pump 31 being regulated in accordance with the level of the water in the boiler, the pump 11 in accordance with the pressure behird the the low pressure boiler, and the pump 21 in accordance with the temperature behind the steam feed water heater 22. In the event of the pump 11 supplying more than the pump 21, the excess flows into the accumulator through the pipe 13. In a further form, the whole of the output of the low pressure boiler 21 is supplied to the accumulator whence supplies are drawn by a single pump to the boilers.