Abstract: A package gas to gas heat exchanger is constructed by joining together a plurality of individual folded plate heat exchanger modules (16) in side by side and optionally end to end relation, without the need for an external housing surrounding the modules. A plurality of baffle plates (38), are prefabricated as part of each module, and joined to each other as the modules are joined, thereby defining a plurality of alternating chambers (46) for the entry or exit of different gases on either side of each folded plate (18). A closure arrangement and method for the longitudinal ends of the folded plates includes closure bars (94, 96) in interference engagement with the folds of the plate (18), and a separator plate (50) which holds the closure bars together and maintains the sealing relationship with the folded plate (18).

Abstract: A packaged gas to gas heat exchanger is constructed by joining together a plurality of individual folded plate heat exchanger modules (16) in side by side and optionally end to end relation, without the need for an external housing surrounding the modules. A plurality of baffle plates (38), are prefabricated as part of each module, and joined to each other as the modules are joined, thereby defining a plurality of alternating chambers (46) for the entry or exit of different gases on either side of each folded plate (18). A closure arrangement and method for the longitudinal ends of the folded plates includes closure bars (94, 96) in interference engagement with the folds of the plate (18), and a separator plate (50) which holds the closure bars together and maintains the sealing relationship with the folded plate (18).

Abstract: A bag filter assembly adapted to permit rapid removal, replacement and repair of the individual filter bags in the assembly. The filter bags are frictionally held in an operational position by a combination of interlocking parts that are securely held by spring biased detents. The spring biased detents of the several parts are designed to permit assembly and disassembly of the bag filter by a series of direct push-pull movements.