Vertically extending heat exchanger

A vertically extending heat exchanger comprising an upright chamber fixedly supported to assume a predetermined elevated position, said chamber having the interior thereof provided with a stationary inner sleeve of thermal conductive material, the exterior of said sleeve being encompassed by a heat exchanger means;

• an elongated dasher mounted within said sleeve for selective longitudinal relative movement between operative and inoperative modes;
• when in an operative mode, said dasher being assembled within said sleeve and being adapted to be rotated about a central longitudinal axis of said sleeve and coacting with the latter to provide a product flow passage defined by an exterior portion of said dasher and an interior surface portion of said sleeve;
• a first endwall assembly removably mounted on a lower exterior end portion of said chamber, said assembly being provided with dasher bearing means;
• a second endwall assembly mounted on the upper exterior end portion of said chamber, said second endwall assembly including a static seal section in encompassing non-rotating relation with an upwardly projecting axial segment of said dasher, and a dynamic seal section in encompassing relation with said axial segment and rotatable therewith as a unit, said static and dynamic seal sections having portions thereof in sealing engagement, both seal sections being movable endwise as a unit with the dasher when the latter is longitudinally moved between said operative and inoperative modes;
• product inlet and outlet ports communicating with said product flow passage;
• and drive means mounted adjacent the second endwall assembly and being provided with a drive segment for imparting rotational movement to said dasher when the latter is in said operative mode;
• the second endwall assembly and the static and dynamic seal sections thereof coact with the axial segment of the dasher, when the latter is in the operative mode, to form a flow passage for an aseptic medium which is segregated from the product flow passage;
• said second endwall assembly including a caplike member connected to the upper end portion of the chamber and overlying the upper end of the inner sleeve, a collar member mounted on said caplike member and aligned with an opening formed therein, the static seal section having a portion thereof sealingly embraced by said collar member, when the dasher is in the operative mode, and lock means adjustably mounted on said collar member and adapted to interlockingly engage the embraced static seal section and maintain the latter in a non-rotating relationship with respect to the dynamic seal section.

A vertically extending heat exchanger comprising an upright chamber fixedly supported to assume a predetermined elevation, said chamber including an interior sleeve of thermal conductive material encompassed by a heat exchange means;

• an elongated dasher rotatably mounted within said sleeve and being selectively adjustable longitudinally between operative and inoperative modes, when in said operative mode, said dasher having an exterior portion thereof coacting with an interior surface of said sleeve to form a product flow passage;
• a first endwall assembly removably mounted on a lower end portion of said chamber and being provided with dasher bearing means;
• a second endwall assembly elevated relative to said first endwall assembly and mounted on an upper end portion of said chamber, said second endwall assembly being provided with an interior cavity in which is disposed a non-rotating static seal section and a dynamic seal section, said seal sections being in encompassing relation with an upwardly projecting axial segment of the dasher and said dynamic seal section being rotatable as a unit with said dasher, said seal sections being in continuous sealing engagement when said dasher is in either mode and movable longitudinally with said dasher when the latter moves relative to said chamber between said modes;
• product inlet and outlet ports communicating with said product flow passage;
• and drive means elevated relative to said first endwall assembly and fixedly mounted adjacent said second endwall assembly and being provided with a drive segment drivingly engaging a portion of the dasher axial segment when said dasher is in the operative mode;
• movement of said dasher to and from said operative mode being effected while the second endwall assembly remains in place on the upper end portion of the chamber and without the need for any manual adjustment of any component of said second endwall assembly.