Patent GB-165524-A (GB)
Title: Improvements in methods of and apparatus for handling, storing and controlling pulverised fuel
IPC: F23K1/02
Filed: 1920-03-26
Abstract: 165,524. Calvert, G. March 26, 1920. Right to Patent relinquished. Fluids, regulating volume of flow or pressure of.-Relates to methods of and apparatus for handling, storing and controlling pulverized fuel in which the fuel is held suspended in a liquid carrier, such as liquid fuel, and comprises means such as air or gas jets or mechanical means for agitating the liquid with which the pulverized fuel is mixed and means for controlling the flow of the liquid without causing filtration or settling out of the solid fuel. When the liquid carrier is not required as a fuel, or when the proportion of the liquid carrier to the solid fuel is greater than that required in the burner or furnace, special means are provided for separating wholly or in the part the liquid carrier from the solid fuel. Fig. 1 shows a feed tank 1 supplied with a solid and liquid fuel mixture from main storage tanks or the double bottom of a ship and provided with perforated pipes 2 through which air or gas is supplied for agitating the mixture. The fuel mixture passes from the tank through a pipe 4 to a burner 5 from which it is injected and atomized by air or gas jets supplied by the pipe 7 and nozzle 6. The tank is fitted with an escape pipe 10 controlled by a valve 9 which controls the pressure in the tank and supply of fuel to the burner. A burner of the weir type shown in Fig. 3a may be employed. The fuel mixture may be supplied to the burner by a rotary pump 11, Fig. 2, the speed of which may be controlled, or the delivery pipe 12 of the pump may discharge into a chamber 14 through a nozzle 13 beneath which is arranged a pivoted deflector 15 to control the supply of fuel passing to the burner pipe 16 and to the pipe 17 leading back to the tank. Fig. 3 shows a locomotive tender provided with a storage tank 20 and feed tank 1 communicating with the storage tank and burner 5, the fuel being agitated by air supplied by a compressor 24 through perforated pipes 27 and 2. The compressor also supplies air to the atomizing jet 6 of the burner. Another device for controlling the flow of fuel consists of an elevator, the speed of which may be varied, arranged in the tank and adapted to deliver into a trough from which the fuel flows to the burner. The flow may also be controlled by a valve having a sliding gate provided with holes of different size, any one of which may be moved into alignment with the inlet and outlet branches of the valve. Fig. 6 shows an alternative form of controlling device comprising a weir 39 over which the fuel flows, and is blown more or less over the partition 40 by an air jet 41 to which the supply of air may be regulated by a valve 42. The excess fuel flows back to the feed tank by a pipe 17. The flow of fuel may be controlled by a device, shown in Fig. 7, consisting of an air-supply nozzle 51 arranged so as to deliver a jet of air of variable strength in the opposite direction to the flow of fuel through tho vertical portion of the pipe. Reference has been directed by the Comptroller to Specification 159,257, [Class 51 (i), Furnaces and kilns, Combustion apparatus of].