GB305977A - Apparatus for the continuous automatic discharge of mud from steam boilers and heaters of liquids - Google Patents

Abstract

305,977. Piccardo, C. Feb. 13, 1928, [Convention date]. Sediment-collectors and settling-chambers.-A mud separator comprises two coaxial groups 15, 16, Fig. 3, of frustums of cones around a descending inlet pipe 13 so that the shortest ascent for the muddy water to the outlet 14, 19 is through an annular zig-zag space. The mud separates by centrifugal force and is drawn out between the cones 16 and down near the shell 2 due to the cooling of the water by contact with the shell. In a smoke-tube boiler, Fig. 1, pipes 3, 7 respectively insulated and ribbed connect the water space to the mud separator 2 below the water level. The pipes 3, 7 lead to the lower side of non-return valves 5, 6 normally held open by their weight, the water circulation being insufficient to close them. When the cock 11 is opened to discharge mud, the flow of water closes the valves 5, 6 automatically so that the separator does not remain at boiler pressure. When the cock 11 is closed, pressure is produced in the separator through a slight cut in, or incomplete grinding of, the valves 5, 6 which thus open. For washing out the separator, the valves 5, 6 are opened by rods 20, 21 and the cock 11 is opened. Air-discharge and testing cocks 8, 10 are provided; and the speed of circulation is regulated by the valves 3<1>, 4.