RECUPERATIVE HEAT EXCHANGER OF TUBE-TYPE FURNACE Russian patent published in 2009 - IPC F28D7/00 

FIELD: heating.

SUBSTANCE: invention relates to power generation equipment and is to be utilised in recuperative heat exchangers during petroleum processing. The recuperative heat exchanger of a tube-type furnace contains a housing with ducts for inlet and outlet of the furnace fuel combustion products, a distribution chamber with a partition, a tube grid and sockets for inlet and outlet of the fluid reheated and a floating head with a cap and a movable tube grid connected to the distribution chamber via tube bundles (the direct one - from the distribution chamber to the floating head and the inverse one - from the floating head to the distribution chamber). Specificity of the heat exchanger design consists in the upper end of at least one tube of the inverse tube bundle being positioned in immediate proximity to the apex of the floating head cavity with its lower end curved and positioned coaxially and inside the distribution chamber outlet socket. The proposed heat exchanger design eliminates the risk of the fluid injection pressure shocks and discontinuity of the fluid flow in the inverse tube bundle.

EFFECT: improved efficiency of the recuperative heat exchanger operation.

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