Patent ID: 6899169
Filing Date: 2005-05-31
Classification: F28D,F28F

Abstract:
1. A shell and tube heat exchanger for transferring heat between a shell coolant and a tube coolant, the coolants being carried by external conduits, the heat exchanger having first and second shell coolant passageways and first and second tube coolant passageways to conduct the coolants, the heat exchanger comprising: a shell, the shell having a central axis, the shell extending between opposite first and second ends, the shell having a wall extending around a periphery and defining a shell cavity therein, the first shell coolant passageway passing through the shell wall adjacent the shell first end, the second shell coolant passageway passing through the shell wall adjacent the shell second end, the shell having at least one threaded locating hole through the shell wall; a first tube header having an outer periphery, and a second tube header having an outer periphery, the first and second tube headers being spaced apart and generally parallel, at least one tube header periphery having a locating recess; a plurality of generally straight and parallel tubes extending between the first and second tube headers, the tubes having first and second open ends attached to and penetrating the first and second tube headers, respectively; wherein the first tube header, the second tube header, and the tubes comprise a tube bundle, the tube bundle being removably received within the shell cavity with the first tube header adjacent the shell first end, and the second tube header adjacent the shell second end, the tube header locating recess being juxtaposed with the threaded locating hole; a locating screw extending between opposite proximal and distal ends, the locating screw threadably engaging the threaded locating hole, the locating screw proximal end engaging the locating recess, the locating screw being adapted to locate the tube bundle angularly about the shell central axis and longitudinally along the shell central axis in a predetermined alignment wit the shell; a first end cover removably attached to the shell first end, the first end cover having an inside surface, and a second end cover removably attached to the shell second end, the second end cover having an inside surface; wherein the shell cavity includes a first chamber extending between the first tube header and the first end cover, and the shell cavity includes a second chamber extending between the second tube header and the second end cover, the first and second tube coolant passageways being in communication with the first and second chambers respectively, and the tube first and second open ends being in communication with the first and second chambers respectively, so as to allow passage of the tube coolant between the first and second chambers through the tubes; first tube header sealing means for slidably sealing the first tube header to the shell; second tube header sealing means for slidably sealing the second tube header to the shell; first end cover sealing means for sealing the first end cover to the shell; second end cover sealing means for sealing the second end cover to the shell; wherein the shell is constructed of a non-metallic corrosion resistant material; and wherein the first and second tube headers and tubes are constructed of metal materials having efficient heat transfer properties.