Waste-oil Garage Heaters
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SPRAY heat oil burners for using waste oil of all kinds are being manufactured by Johnson and Starley, Ltd., Whitegate Drive, Marton, Blackpool. The plant is particularly valuable in making use of the large amounts of lubricant waste which frequently accumulate in garage's, and conversions to this type of operation can be carried out at varying costs, according to the size of heating equipment concerned.
Cost of a typical conversion installation works out at approximately £400. An average of one gallon of waste oil an hour is stated to give an adequate rise of temperature over a 500-ft. length of 4-in. pipe.
The oil-burner unit is fitted to the front of the boiler and, to prevent burning of the box, .fires into a fire-brick chamber. A fractional h.p. motordriven Pump forces the, waste oil from the storage tank to a three-gallon container near the burner, where it is warmed by a thermostatically controlled immersion heater. A further pump drives the oil through the burner nozzle and, by means of an air blast, forms a combustible mixture. Mains gas is used for initial ignition.
Temperature at the boiler can be predetermined by the thermostat, which automatically cuts off the burner when boiler heat reaches the desired level; re-ignition takes place after a fall of 10 degrees.