Patent GB-633336-A (GB)
Title: Apparatus for the combustion of combustible and vaporizable substances
IPC: B05B7/20
Filed: 1945-08-27
Abstract: 633,336. Burners. BONVILLIAN, C. A., BRIERLY, R. C., and LETVIN, S. Aug. 27, 1945, No. 22021. Convention date, Aug. 26, 1944. [Class 75 (i)] [Also in Groups XII and XXVI] Combustible substances which are vaporizable or are in pulverized form are mixed with combustion products and the mixture is discharged in a plurality of separate jets into a zone supplied with air for combustion. Fig. 1 shows a fogdispelling apparatus or a coldweather atmospheric heater for vegetation in which fuel supplied to a burner 12 and air supplied by a blower 131 are burnt in a chamber 15 and a combustible substance as above is supplied through atomizers 28, 29 to the combustion products as they issue from the chamber 15 into a conduit 32 leading to a distributer 33 arranged in an air register 42 having air inlets 45 controlled by a revoluble louvre 43. The combustion chamber 15 consists of diverging and converging frusto-conical bands 18, 19, 20 spaced from the furnace wall 11 by radial fins 21 ... 24, annular openings 46 being left between the bands for the passage of secondary air from the wind-box 13. Grids 31 may be provided in the spool piece 30 to prevent precipitation of residual material from the atomizers 28, 29 into the chamber 15. The distributer 33 consists of spaced tubular arms 34 projecting radially from a central chamber 35 and provided with spaced longitudinal rows of discharge nozzles 36. The air flow is deflected from the bases of nozzles 36 by fixed or movable deflectors 37 which may be notched, perforated, or slotted. In another construction the distributer consists of a hollow ring having concentric rows of spaced nozzles, the nozzles of one row being staggered relatively the nozzles in adjacent rows. Fig. 4 shows a distributer suitable for use in a steam generator comprising longitudinally extending manifolds 49 carrying spaced nozzles 50 and connected at their ends to conduits 51, 52 supplied with a mixture of combustion products and atomized fuel by furnaces 10. Air is supplied to the mixture issuing from the nozzles 50 through registers 53 and is controlled by shutters fixed to shafts rotated simultaneously by gearing 56 operated by a reversible electric motor M. Fig. 7 shows a distributer for use in a gas turbine comprising a distributing ring 65 connected to an inlet conduit 68 for the mixed combustion products and combustible substance and surrounded by a duct 66 supplied with air at relatively high pressure through an inlet conduit 67. The ring 65 is fitted with nozzles 69 having air inlets 70 and delivering the fuel and air mixture through tubes 72 on to the blades of a turbine wheel 74. Fig. 8 shows a distributing ring 76 supplied with combustion products and combustible substance having a plurality of nozzles 85 in alignment with nozzles 87 on a supplemental air duct 78 and with the nozzles 85 arranged in an annular air conduit 77 enclosing the ring 76. The mixture is discharged for combustion through nozzles 83, 84 on the conduit 77 and cross arms 80. The burner described may also be used in fluid heaters, rocket or jet propulsion devices, vapour generators and drying, smelting, sintering or baking apparatus, oil or pulverized coal may be used as fuel. Specification 597,151, [Group XII], is referred to.