GB1419547A - Heat generators - Google Patents

Abstract

1419547 Combustion apparatus G M GOUBSKY 6 Feb 1973 5859/73 Heading F4B A heat generator comprises a cavity wall structure 1 providing a combustion chamber and a passage surrounding it for preheating the combustion air, an air inlet opening tangentially into the cavity, an air distribution ring 4 with tangential vaned inlets 8, connected to the upper and lower sections of the combustion chamber by spacers 7 providing air gaps, the effect of the inlets and the gaps being to produce toroidal vortices 24, 26 of secondary air in the combustion -chamber. Liquid fuel is fed under pressure to the jet 8 of the burner and the burner is surrounded by a swirler ring 10 for primary combustion air. Ignition electrodes 14 are provided to light the burner. The burning fuel spray from the jet 12 rises in a cone and penetrates the toroid 24. Any droplets not burned here enter and are burned in toroid 26. The hot combustion products leave the combustion chamber at E. In a similar form (Fig. 3, not shown) there are two air distribution rings, one in a narrow part of the combustion chamber near the fuel jet and one higher up in a wider section of the chamber. Such a combustion chamber is shown in Fig. 4. In this form however, the incoming combustion air is distributed via a box 39 to a number of heat-exchange tubes 45, 46 surrounding the combustion chamber, before being introduced into the combustion chamber through the distributer ring 38. There is a similar arrangement for the lower ring 50 and the bottom cone of the combustion chamber is surrounded by a heat exchanger coil 59 for the fuel. The chambers C, D, F containing the heatexchange tubes are filled with a heat transfer medium, e.g. a powder, granules, molten salts, liquids of high thermal conductivity and enthalpy or liquids in vapour phase. Tertiary combustion air is fed by a blower fitted with a damper into the inlet port 41. Primary and secondary air are also supplied under pressure as in the form of Fig. 1. In another form (Figs. 7-9, not shown) the combustion chamber is not cooled by the incoming combustion air but by a circulating cooling liquid. The air is applied to the burner and three successive distributicm rings either direct or after having been preheated.