US1816850A - Heat exchange apparatus - Google Patents

Description

Aug. 4, 1931. N. L. HURD 1,816,850

111m EXCHANGE APPARATUS Filed July 16, 1930 2 Sheets-Sheet 2 lI iinew' jfizvegior WM 6?: 7 I so as 92 7 fi W Patented Aug. 4, 1931 UNITED. STATES PATENT" OFFICE NORMAN L. HU'RD, OF BROOKLYN, NEW YORK, ASSIGNOR TO 0. H. LEACH COMPANY, OF

NEW YORK, N. Y., A CORPORATION OF NEW JERSEY HEAT EXCHANGE APPARATUS Application filed m 16, 1930-. Serial No. 468,266.

The present invention relates to heat exchangers, and more particularly to heat exchangers employed in connection with oilrefining operations, in which a hot oil vapor is partially or wholly condensed in a tubular exchanger through which cooling'liquid is circulated.

The object of the invention is to provide in a tubular heat exchanger of the aforementioned type a plurality of cooling liquid .passes in a minimum of space to promote economy of construction and efliciency of operation.

With this and other objects in View, the 1 various features of the invention consist in certain novel features of construction, combinations, and arrangements of parts hereinafter described and claimed, the advantages of which will be obvious to those skilled in the art from the following decription.

In'the preferred form of the invention shown in the drawings,

Fig. 1 represents a section in elevation of a vertical type of tubular heat exchanger having provision for the formation and withdrawal of the condensate from the region surrounding thelower tube ends; and

Fi 2 is a section in elevation of a modified i orm of tubular heat exchanger in which the floating ends of the tubes are located at the lower portion of the condenser rather than at the upper portion.

In the embodiment of the invention illustrated in the drawings, more particularly in Fig. 1, a series of tubes 10 are disposed in vertical relation within an enclosing shell 12. The tubes are rigidly mounted at their lower ends by rolling, or equivalent means, 49 within a tube support 14 which may be in the form of a casting or forging having an upper circumferential web 16 to provide a condensate basin, and a lower circumferential web 18 to form the outer wall of cooling liquid passages. The shell 12 is mounted upon and secured to the upper web of the tube support through any desired form of construction, as a ring 20. Vapor to be cooled may be admitted to the shell through an inlet nozzle 22 and delivered from the shell through an outlet nozzle 24. The upper end of the shell is closed by a detachable cap or bonnet 26, as indicated. In the form of the invention shown, the vertical tubes 10 are divided into a series of banks or bundles to provide for a plurality of liquid and vapor -passes, and to promote the greatest efiiciency of heat exchange within a minimum of space. To this end the tubes 10 may be considered as divided into bundles, denoted as 25, 26, 27 and 28, reading from left to right. Each of these tube bundles is closed at the upper end by a fioatin head 30 having a base portion 32 into W ich the upper tube ends are rolled, and a cover portion 34 which hermetically seals the space communicating with the interior of the tube. These floating heads of necessity project beyond opposite sides of the tube bundles, and in order to place the bundles in a compact relationship and avoid inefficiently large vapor spaces therebetween, I have found it possible to stagger the floating heads by making the tube bundles of dissimilar length. This I accomplish by forming the intermediate tube bundles 26 and 27 of suiiicient length to project beyond the outer tube bundles 25 and 28, and thus remove the floating heads connected to the intermediate tube bundles beyond the path of movement of the outer floating heads, as indicated particularly in in the drawings. By virtue of this arrangement, the opposite ends of adjacent heads maybe caused to overlap in amanner to minimize the space between the bundles. As the tubes expand and contract, the floating heads move in paths controlled thereby with out interference. Separating the intermediate tube bundles is a longitudinal partition or baflie 40 having a vapor passage 42 at the upper end. This bafile extends upwardly between the two intermediate floating heads, as indicated, and downwardly into contact with an integral web44, dividing the condensate basin into two parts. This bafile is conveniently connected at opposite edges to the shell, and is removable therewith. By virtue of this construction, the shell surrounding the tube bundles, to-

gether with-the bafile, may be completely withdrawn from about the bundles without interference with the floating heads or the bundles themselves. In operation the vapor passes inwardly through the nozzle 22, upwardly about the bundles 27 and 28, through the opening 42, downwardly about the bundles 25 and 26, and outwardly through the nozzle 24. The condensate formed from the vapor is collected in the two separate portions of the basin, and may be Withdrawn from condensate openings 50 and 51. A cooling liquid is delivered to a passage 54 through a nozzle 56, and after passing through the interior of the tube bundles and series of passes, as will be clearly evident, is delivered through the nozzle 58. Reversal of liquid flow is controlled by the floating heads at one end of the tube bundles and by partitions at opposite ends of the tube bundles.

The construction shown in Fig. 2 embodies a similar arrangement of floating heads in which the heat exchanger is inverted. The tubes 10 depend from a flat tube support connected at their upper ends,-

and provided at their lower ends with a series of floating heads 72. Vapor is adat one end.

' NORMAN L. HURD.

mitted and exhausted through nozzles 74 and 76, and directed in two vapor passes by the intermediate partition 78. Cooling liquid is admitted and exhausted through the nozzles 80 and 82 formed in the cap 84, and provided with partitions 86 which form passages communicating with the interior of the bundles. Condensate is collected in the chamber 86 formed in two parts by the partition 88, provided with separate discharge openings 90 and 92. In the same inanner as in the previous construction, the shell may be withdrawn downwardly from about the tube bundles by disconnecting from the tube sheet or support, and withdrawal with the connected partition without interference with either the floating heads or connected bundles.

What is claimed is:

'1. Heat exchange apparatus comprising a series of tubes divided into bundles, meansfor fixedly supporting all ofthe tubes at one end, a head connected to the opposite end ofeach tube bundle in staggered relationship, a shell surrounding all of the bundles, a partition extending longitudinally of the bundles. between adjacent heads, and means for connecting the partition to the shell to permit withdrawalof the shell and connected partition. u

2. Heat exchange apparatus comprising a series of tube bundles of dissimilar length, means for fixedly supporting-all of the tube bundles at one end, a head connected to the opposite end of each tube bundle, a shell surrounding the bundles, and a partition ex-

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