Abstract: A new type of sealing partition around heat exchanger tubes in heat exchanger walls is disclosed. A support structure is used to position and hold the tubes in place. Overlapping inserts are then inserted over the tubes adjacent the support structure and welded together to seal the heat exchanger chambers. When a heat exchanger is assembled using the invention the heat exchanger is easily and inexpensively assembled and the sealing partition in conjunction with the support structure provides structural support for the tubes and seals the chambers while allowing heat expansion and contraction of the chambers due to the varying temperatures in the heat exchanger.

Abstract: An improved, essentially pollution-free incinerator for waste materials is provided which includes vertically stacked, separately fired primary and secondary combustion chambers and central, cooperating, apertured partition and baffle structure serving to assure complete burning of the waste materials and removal of particulate solids prior to discharge thereof to the atmosphere. In preferred forms, the central, chamber-defining partition includes a plurality of circumferentially spaced, peripheral apertures, while the baffle structure is in the form of an annular, peripheral shoulder formed on the inner wall surface of the secondary chamber above the partition apertures. The primary chamber also includes a waste material inlet and a burner system for igniting the waste materials, while the secondary chamber has tangentially disposed air and fuel inlets for creating a whirling flow pattern to assure essentially complete high temperature burning of the waste materials.

Abstract: A heat transfer apparatus for cooling a hot process gas to a temperature close to its dew point without condensation. The hot gas passes through a first chamber while air to be heated passes in an adjacent second chamber. A series of fluid containing tubes extend back and forth between the two chambers. The fluid continuously flowing through the tubes extracts heat from the hot gas and transfers it to the air to be heated.