Method and device for the recovery of heat from installations emitting steam-laden hot air and steam, and for increasing the productivity of these installations

摘要

1. Method for the recovery of all the heat (except for losses through radiation) contained by the mixture of air and steam, at a temperture greater than that of an auxiliary fluid to be heated up, emitted by an installation producing this mixture of hot air and steam, which consists in passing the said mixture inside a tubular exchanger having groups of coils for the circulation of the fluids to be heated up, characterized in that : during its passage inside the exchanger, the mixture of air and steam is maintained at a maximum pressure greater than the ambient atmospheric pressure by means of the extraction fan or fans of the installations, the arrangement of the components of the exchange chamber, and at least one flap for regulating the rate of the escape of the residual air from the exchanger ; all or part of the residual dehydrated hot air is reinjected through the treatment apparatus ; the condensates of the steam of the mixture are caused to run off slowly towards the base of the exchanger, it being possible for these condensates to be reused either because of their nature or owing to the residual heat which they contain, or a combination of these features.