Two pass shell and tube heat exchanger with return annular distributor
First Claim
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1. A shell unit for use in a two pass shell and tube heat exchanger, comprising:
- a shell having a first end and a second end and an interior and an exterior and having at least one first shell opening between said first end and said second end and at least one second shell opening between said first end and said second end and wherein said at least one second shell opening is completely separate and distinct from said at least one first shell opening;
a longitudinal baffle sealingly engaged to the interior of said shell, wherein said longitudinal baffle divides at least a portion of the interior of said shell into a top half and a bottom half wherein said first shell openings are in communication with said top half and said second shell openings are in communication with said bottom half; and
return distributor means for providing direct fluid flow communication between said at least one first shell opening and said at least one second shell opening through said exterior of said shell.
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Abstract
A shell unit for use in a two pass shell and tube heat exchanger is provided. The shell unit has a return distributor means for providing direct fluid flow communication between the first pass of the two pass shell and tube heat exchanger and the second pass of the two pass shell and tube heat exchanger without excessive flow obstructions and associated pressure losses.
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Citations
10 Claims
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1. A shell unit for use in a two pass shell and tube heat exchanger, comprising:
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a shell having a first end and a second end and an interior and an exterior and having at least one first shell opening between said first end and said second end and at least one second shell opening between said first end and said second end and wherein said at least one second shell opening is completely separate and distinct from said at least one first shell opening; a longitudinal baffle sealingly engaged to the interior of said shell, wherein said longitudinal baffle divides at least a portion of the interior of said shell into a top half and a bottom half wherein said first shell openings are in communication with said top half and said second shell openings are in communication with said bottom half; and return distributor means for providing direct fluid flow communication between said at least one first shell opening and said at least one second shell opening through said exterior of said shell. - View Dependent Claims (2, 3, 4, 5)
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6. A shell and tube heat exchanger comprising:
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a shell having a first end and a second end and an interior and an exterior and having at least one first shell opening between said first end and said second end and at least one second shell opening between said first end and said second end and wherein said at least one second shell opening is completely separate and distinct from said at least one first shell opening; a longitudinal baffle sealingly engaged to the interior of said shell, wherein said longitudinal baffle divides at least a portion of the interior of said shell into a top half and bottom half wherein said at least one first shell opening are in communication with said top half and said at least one second shell opening are in communication with said bottom half; a tube sheet disposed transversely within said shell wherein said tube sheet is in contact with said longitudinal baffle and wherein said longitudinal baffle divides said tube sheet into a top half and bottom half; a plurality of U-shaped tubes having a first end, a U-bend region and a second end wherein said first end of each said U-shaped tube pierces said top half of said tube sheet and wherein said second end of each said U-shaped tube pierces said bottom half of said tube sheet; and return distributor means for providing direct fluid flow communication between said first shell openings and said second shell openings through said exterior of said shell. - View Dependent Claims (7, 8, 9, 10)
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Specification