Abstract: Disclosed is a contaminated waste steam heat recovery apparatus 10 and method therefore which includes a primary condensing unit 38, a low pressure water washing unit 26, a liquid to liquid heat exchanger 36 and a vent fan 31. Waste gas is ducted from fryer 11 to a de-super-heating chamber 14 wherein superheated steam is converted to saturated steam by spraying water into the steam using spray nozzles 15. The gas is then introduced into a vertically disposed air to liquid heat exchanger 16 and is drafted downward therethrough. As heat is removed from the waste gas, water vapor in the steam condenses and in the process, collects some of the oil and hydrocarbons present. A plurality of condensate trays 19 are disposed below the bottom end of heat exchanger 16 in a cascading fashion to collect hold the condensate in the airflow path such that it will absorb some of the heat still present in the remaining waste gas.

Abstract: A steam system is disclosed having a steam boiler (14) designed to produce an adjustable supply of boiler steam and a steam accumulator (12) designed to supply all of the steam to steam load (66) as opposed to functioning as an auxiliary source to boiler (14). Steam accumulator (12) is a pressure vessel designed to function as a wet steam accumulator and sized to provide large quantities of steam in short bursts for a predetermined period of time to a sustained cyclic steam load (66) for a period of time sufficient to compensate for the time delays necessary to adjust the boiler steam produciton rate to equal changes in the average of the cyclic demand load.