GB287273A - Improvements in or relating to water tube boilers - Google Patents

Abstract

287,273. Vennum, G. C. Jan. 22, 1927. Water-tube boilers.-In a boiler comprising a steaming section and a water heating section arranged above the steaming section, means for normally maintaining a body of water in the heating section and so preventing flooding of the steaming section are provided which consist of pipes F<14>, F<16> extending from the bottom of the heating section upward to a level corresponding substantially to the top thereof and thence downwardly to the steaming section, and a steam and water drum F<15>, located at the top of said pipes and into the bottom of which the pipe F<14> opens and to which the pipe F<16> is connected at a higher level. The steaming section is positioned in the open top of a furnace chamber C and comprises a steam and water drum B, into which the pipe F<16> leads, and two further drums B<1>, B<2> connected by tubes as shown. The heating section comprises a series of headers F - - F<11> connected by pipes F<12> and is located directly above the steaming section in a single pass from the furnace chamber. The pressures in the drums B, F<15> are equalized by a tube F<18> connecting the top of each, while steam vent pipes F<17> leading from the lower part of the heating section into the top of the drum F<15> and from thence to the steaming section by the pipe F<16>. A superheater D and air-heater H are provided as shown.