IMPROVEMENTS IN BURNERS

摘要

The regenerative heating apparatus (FIG. 1) comprises a pair of regenerators 51a and 51b arranged so that in use while one is being heated by waste gas, the other is preheating air for the combustion of fuel. A reversing valve 58 is connected to each lower end 91a and 91b of the regenerators 51a and 51b, the valve 58 connecting the regenerators 51a and 51b to an inlet 99 for receiving air and an outlet 100 for discharge of the waste gas. The reversing valve 58 is reversible to connect one regenerator to the inlet and the other regenerator to the outlet. Each regenerator incorporates at its upper end a burner (B1 and B2) with as shown in FIG. 2 a body having a passage 2 formed with openings 3 and 4. The opening 4 serves to receive air for combustion when its regenerator is preheating air or to discharge waste gas to the regenerator while the opening 3 serves to supply combusted fuel and air to the furnace 90 or to receive waste gas from the furnace 90. Each burner has an assembly 5 for injecting fuel and air into the passage 2 and the fuel and air first mix in a nozzle 31 with the fuel being ignited by an electrode 47. The fuel is combusted in a precombustion chamber 32 before entering the main combustion chamber 16. The fuel is partially or fully precombusted irrespective of the mode in which the burner is operating to avoid prepurging with or re-ignition between regenerator operating cycles.