US1689910A

US1689910A - Heat exchanger

Info

Publication number: US1689910A
Application number: US231204A
Authority: US
Inventors: Arthur P Brocklebank
Original assignee: Foster Wheeler Inc
Current assignee: Foster Wheeler Inc
Priority date: 1927-11-05
Filing date: 1927-11-05
Publication date: 1928-10-30
Anticipated expiration: 1945-10-30

Description

Oct. 30, 1928.

1,689,910 A. P. BRQcKLl-:BANK

HEAT EXCHANGER Filed Nov. 5, 1927 2 Sheets-Sheet l v mx m `lllllllz v VII/Il Oct. 30, 1928-.

A. P. BROCKLEBANK HEAT EXCHANGER Filed Nov. 5, 192'? 2 Sheets-Sheet 2 Patented ou. 30,1928.

1,689,910 UNITED STATES PATENT OFFICE.

anTnUa r. BBOQKLEBANX, or ELIZABETH, NEW JERSEY, AssIeNoa To FOSTER.

,WHEELER OoarONATION, Or Naw YORK, N. Y., A CORPORATION or NEW Yozax.

HEAT ExcHANeaa.

Application led November 5, 1927. Serial No. 231,204.

This invention relates to a heat exchanger of the typein which there is commonly emplo ed a shell, a plurality of tubes therein, 'andy means for passin mediums, to and from which heat is to be ded or extracted to the s s in the shell surrounding the tubes and t rough the spaces within the tubes. The heat exchanger is, furthermore, of the type adapted for use in the petroleum industry or as surface condensers, feed water heaters and the like in power plant pratice. v

In'certain types of heat exchangers of the kind to which the invention relates, it is customary to divide the interior of the shell into a pluralit of compartments by employing a ongitu ally disposed baille plate or baille plates dividing the tubes into banks for the purpose of directing the flow of the medium passing through the shell of the apparatus to cause the same to come into intimate oon'- tact with as much as possible of the tube surface therein. Heretofore, difficulty has been ex rienced in making a joint between the basi; plate and the shell sufficiently tight to prevent a portion at least of the medium from eaking or by-passing from one compartment to another within the shell and thereby not following its intended course and consequent- Lly impairing the eiciency of the apparatus.

e present, invention, therefore, relates more particularly to the form of joint in this type of heat exchanger between the -bafile plate or artition wall and the shell with the lobject o, overcoming the difficulties to which reference has been made by providing a substantially tight joint between the baille plato and the shell thereby positivelviicausingthe medium flowing through the shell to follow its intended course and to thereby increase the elliciency of the apparatus as far as may be possible by preventing the leakage or bypassing of the medium from one compartment ,to another within the shell as will be herein-n after more particularly described.

In the drawing Figure 1 is an elevation of the partial section of the heat exchanger in which the present invention is incorporated.

Figure 2 is a partial transverse 'section on an enlarged scale illustrating a form of joint between the bale plate and shell, c

Figure 3 is a section on line 3 3, Figure 2).,

Figure 4 is a view similar to Figure 2 showing another form of the invention,

Figure 5 is a central longitudinal section On an enlarged scale showing another form= of 'oint,

igure Gis a section on line 6-6, Figure 5 on an enlarged scale and Figure 7 is a view similar to Figure 6 showstill another form of e joint. eferring to the drawing the heat exchanger, in which the present invention is incorporated, is illust-rated as including a shell 10, which is preferably cylindrical, but may be of other configuration, andis provided at its extremities with

flanges

11 and 12. The shell is also provided in suitable places with an inlet nozzle or connection13 and an outlet nozzle or connection 14. At one end of theshell there is a tube plate 15 and at this end thereof the Ashell is fitted with a box forthe inlet and discharge .of a medium. This box 16 as illus- ,trated is provided interiorly with a partition Wall 17 extending transversely across the same and in Oppositely disposed positions the box 16 is made with an inlet nozzle or connection 18 and an Outlet nozzle or connection 19 whereby the box serves as an inlet and an outlet for the medium passing to and from the Sallie. It will be understood that the box 1 6 issuitably flanged or otherwise provided with meansl whereb the box and the flange 12 of the shell may f e suitably connected with the `tube plate 15 intervening. At the opposite end of the shell the same is fitted with a' cover 20, which is connected to the flange 11k of the shell i by any suitable means'. Vithin the cover 20 or at this end ofthe shell,`there is a tube plate 21 within the shell, and extending between and connected to the tube vplates there are the usual tubes indicated at 22. The tube plate 21 and` a bonnet 23 connected thereto are preferably of the floating head ty e.

Thes ell may be divided -interiorly into a plurality of compartments. For the purpose of illustration the shell is shown as being divide into two compartments by a single baille member.

A same and the shell are similarly ma@ and for this reason, the illustration and descripa cor-y Of course, when there is a greater@ Inumber of compartments in the shell tion of one of these baffles or partition walls nd the joint between the same .and the shell 'will serve for explaining the construction,

thereof. In carrying out the invention the baille or partition wall preferably comprises a pair of plates indicated at 24 and 425 although, of course, the number of plates is not so limited. As illustrated, these plates yadjacent the long edges are separated by a spacer bar 26 to which they are connected and maintained in this spacedposition by bolts or rivets 27 or otherwise. The shell of the apparatus is interiorly fitted with oppositely disposed rails, one of which for the purpose of illustration is indicated at 28. These rails are secured to the shell in any suitable nianner and serve as supports for the baille or partition wall, the parts being so designed that the width of the rails is substantially equal to the distance between the inner or adjacent faces of the

plates

24 and 25 of the baille, whereby the bale is adapted to slide to position on these rails. It will, furthermore, be understood that due to the floating head tube plate construction, this baille is removable with the tube plate I5, the tubes and the floating head as a unit.

In order to provide a tight joint between the edges of the

plates

24 and 25 and the rail 28 I employ a strip of packing 29. This may be made of any suitable material, such, for example, as asbestos or the like. In order to maintain the packing against the face of the rail and also against the adjacent portion of the inner faces of the plates of the bathe, I eniploy a packing strip 30 of metal or similar material, which in length is co-extensive with the rail and is maintained in position against the packing by a series of springs or other equivalent means which are resilient or otherwise. As illustrated, for example, in Figures 2 and 3 of the drawing, I may employ a plurality of suitably spaced springs 31, each spring being fixed in position to the spacer bar by means of rivets or bolts 32 or otherwise. By the use of the packing, the packing strips, and the springs it will be understood that the packing strip is yieldingly maintained in position against the packing, which forces the packing in place against the rail and against the inner faces of the plates forming the baille in order to make a tight joint between these parts.

In some instances where there may be considerable ressure employed in forcing the medium through the compartments o the shell, the packing, as indicated at 33 in Figure 4, may be considerably thicker than that indi-A cated in Figures 2 and 3, and maybe recessed on one side as indicated at 34, the wall defining the recess being tapered to receive the corresponding tapered walls 35 of the packing strip 36. These parts are maintained in position by means of springs or other similar devices, as hereinbefore described, and due to the tapering walls, the packing strip, and the recess in the side of the packing, the packing is not only forced against the inner face of the rail 28 but the edges of the packing are more forceably maintained in position against the inner faces of the

plates

24 and 25 forming the baille.

In other instances it may be possible to dispense with the rails 28 and also with Athe springs as a holding means for` maintaining the packing in position, for example, as shown in Figures 5 and 6, the

plates

38 and 39 forining the walls of the baille may be connected and spaced by the spacer bars 40 to which these plates arc connected by rivets or bolts 4l or otherwise. In this construction the inner faceof the spacer bar 40 istapered from end to end, as indicated at 42, and a wedge 43 having a correspondingly tapered face employed to force the packing 37 to position directly against the inner surface of the shell of the apparatus. It will be understood that by suitable means the packing and the wedge member may be placed in position after the tube bundle is inserted in the shell.

In other instances the rails 28 may also be dispensed with, as illustrated in Figure 7, and the packing maintained in position directly in contact with the inner surface of the shell. For example, in this construction, the baille comprises plates 44 and 45, suitably spaced and maintained in their relative relationship by they spacci' bar 46 and rivets or bolts 47. Connected to the spacer bar thaere is a series of sprin s, one of which is indicated at 48 and all of w lich are adapted to bear against a packing rail 49 to force and maintain a packing 50 against the inner surface of the shell as liereinbefore stated. It will be understood that in so doing this packing is also forced against the adjacent inner surface of the plates 44 and 45 to thereby complete a substantially tight joint between the parts of the baille and the inner wall ofthe shell.

It will beunderstood that the forms of the invention herein shown and described are more or less illustrative as these and equivalent forms may be employed without departing from the nature and spirit of the invention which involves suitable means for positively forcing and maintaining a packing in position to produce a substantially tight joint between a baille plate and the shell of a heat exchanger apparatus.

I claim as my invention:

1. In a heat exchange apparatus, a shell, tube plates, tubes extending between the tube plates, a baiile extending longitudinally of the shell and dividing the same into compartments, a packing at the longitudinal edge of the baille, and means for positively forcing the packing to position to make a substantially tight joint between the shell and the baille. i

2. In a heat exchange apparatus, a shell, tube plates, tubes extending between the tube plates, a multipart baille extendingl longitudinally of the shell and dividing t e Same tube plates, tubes extending between the tube plates, a two part baille dividing the shell longitudinally into compartments, means for spacing the parts of the baille, a packing, and means for forcing the packing to position between the parts of the baille and the shell to make a substantially leak proof joint between them. i

4. In a heat exchange apparatus, a shell, tube plates, tubes extending between the tube plates, a rail secured interiorly to the shell and extending lonvitudinallythereof,amultipart baille extending` longitudinally of the shell and dividing the same into compartments and adapted to engage the said rail, a

packing lying within the parts of the bafile,`

and means for forcing the packing to osition against the rail and the parts of the aille to make a substantially leakproof joint between them.

5. In a heat exchange apparatus, a shell, tube plates, tubes extending between the tube plates, a rail secured interiorly to the shell and extending longitudinally thereof, a two part baille also extending longitudinally of the shell, dividing the same into compartments, and adapted at an edge portion to span and engage the said rail, a packing within the edge portion of the said baille, and means for forcing the packing against the baille with the adjacent portion of the rail to make a substantially leak proof joint between them.

6. In a heat exchange apparatus, a shell, tube plates, tubes extending between the tube plates, a rail secured interiorly to the shell and extending longitudinally thereof, a twoV part baille also extending longitudinally of .the shell, dividing the same into compartments, and adapted at an edge portion to span and engage the said rail, a spacer bar to which the parts of the baille are secured, a packing, and means co-operating with the spacer bar for forcing and maintaining the packing in position against the said rail and the adjacent parts of thebalile for making a substantially tight joint between them.

7. In a heat exchange apparatus, a shell, tube plates, tubes extending between the tube plates, a rail secured interiorly to the shell and extending longitudinally thereof, a two part baille also extending longitudinally of the shell, dividing the same into comparty.,

ments, and adapted at anl edge portion to span and engage the said rail, a spacer bar,

a packing lying between the edge portions .of the baille, a packing rail adjacent the said packing, and means A(zo-operating between the spacer bar and the packing rail for forcing and maintaining the packing in position against the said rail and the adjacent parts of the baille to form a substantially leak proof joint between them.

8. In a heat exchange ap aratus, a shell, tube plates, tubes extending etween the tube plates, a rail secured interiorly to the shell and extending longitudinally thereof, atwo part baille also extending longitudinally of the shell, dividing the same into compartments, and adapted at an edge portion to span and engage the said rail, a spacer bar, a packing between the edge portions of the parts of the baille, a packing rail co-extensive longitudinally with the packing, and a plurality of springs secured to the said spacer bar and bearing against the said packing rail to force and maintain the packing in position against the said rail and the adjacent parts of the baille to form a substantially leak proof joint between them.

Signed by me this 5th day of October, 1927.

ARTHUR P. BROCKLEBANK.