US1567814A - Heat exchanger - Google Patents

Description

Dec. 29, 1925- 1,567,814 D. D. PEEBLEs HEAT EXCHANGER Filed June 8, 1921 3 Sheets-Sheet 1 ik n.wull 2 m I o MME i ,l a

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Dec. 29, 1925- D. D. PEEBLES HEAT EXCHANGER Filed June 8, 1921 3 Sheets-Shea?l 2 12u/@infor B 31u/d D. Peebles y @ZM M orney Dec. 29, 1925.

1,567,814 D. D. PEEBLES HEAT EXCHANGER Filed June 8, 1921 3 Sheets-Sheet 5 avfid Peebles Patented Dec. 29, 1925.

UNITED STATES PATENT OFFICE..

DAVID D. PEEBLES, OF EUREKA. CALU'OBNIA, ASSIGNOR 0F ONE-HALF T0 GEORGE '.l. TOOBY, l' EUREKA, CALIFORNIA.

lHEAT EXCHANGEB.

Application med .Tune 8, 1921. Serial No. 475,938.

To all whom t may concern.'

Be it known that I, DAVID D. PEEBLES, a citizen of the United States, residing at Eureka, in the county of Humboldt and- State of California, have invented new and useful Improvements in Heat Exchangers, .of which the following vis a specification.

This invention relates-to a heater, and

\ especially to liquid heaters such as are employed in condensing, evaporating plants and the like.

One of the objects of the present invention is to generally improve and simplify the construction of liquid heaters, and especially to provide a structure which will permit a maximum heat transfer to be obtained between the heating medium and the liquid to be heated; heat efficiency being obtained in this instance, first, by exposing $0 the liquid to a large heating surface, and secondl b maintaining the liquid in a state o agitation and under comparatively high velocity.

Another object of the invention is to proll vide a heater substantial and compact in construction, and which may be readily opened for inspection, repairs, etc., but particularly for the purpose of cleaning the same, and which will present a series of exposed surfaces readily accessible for cleaning with wire brushes, Scrapers or otherwise.

Another object of the invention is to provide a heater in which all arts are free 85 to expand without danger o imposing unncssary strains or producing leakage between the connected parts.

Further objects will hereinafter appear.

The invention consists of the parts an the construction, combination and arrangement of arts as hereinafter more fully described and) claimed, having reference to the accompanying drawings, in which- I Fig. 1 is a central, vertical, longitudinal section through the heater.

Fig. 2 is a cross section of the upper head taken on line 2-2, Fig. 1.

Fig. 3 is a similar section taken through the lower head on line 3 3, Fig. 1.

l0 Fig. 4i is a plan View of the eater and i particularly of the upper head.

' Figure 5 is a cross section on line 5-5,

Fig. 1.

Referring to the drawings in detail, and particularly to Fig. 1, A indicates in general a heater consisting of a cylindrical shell and a pair of head members indicated at 2 and 3. The shell proper is'preferably cylindrical in cross section as shown and consists of an inner section 4 and an exterior section 5. The upper endof the vexterior section is secured to the inner section by means of anannular Z-shaped flange 6, and the lower end is similarly secured to the inner shell section 4 by a Z-shaped flange 7; the lower liange bein fairly heavy and constructed of steel, while the upper flange is thinner and is constructed of other material, for instance, such as copper or the like, for purposes to be hereinafter described.

The inner shell is perforated as shown at 8 and it consists of an upper section and a lower section; a slip joint 9 being formedl between the sections to permit free expansion. The up er head 2 is secured to the upper end o the inner perforated shell in a suitable manner; the lower head being similarly secured. The heads are identical in construction and they sup ort a series of sections of heating tubes indicated at l0, 11, 12,13, 14, 15 and 16; the ends of the tubes being rolled or otherwise secured in the bottom of the respective head sections as shown in Fig. 1. Each head member consists of an inner section such as indicated at 17; the exterior side of each inner section being ribbed as at 18 to form a series of compartments; the upper head containing the compartments indicated at 19, 20, 21 and 22, while the lower head contains .the compartments indicated at 23, 24, 25 and 26. Each head is also provided with a cover plate 27, which is hingedly secured as at 28; each cover being secured when in closed position by means of a series of ivoted bolts 29. These bolts are threade on their upper ends and are swung into and out of engagement with fork-shaped lugs 30 formed on each cover; said lugs forming a support for the nuts carried by each bolt when the covers are to be secured. Each head is also provided with a radialextension such as indicated at 31; the radial extension on the upper end forming a discharge opening an the radial extension on 105 the lower head forming an inlet opening.

be connected with a trap or the like nothere shown. The liquid to be heated is admitted through a pipe 35. The liquid enters the chamber 23, and as the pipes 10 register therewith, .it is obvious that the liquid will pass in an upward direction through the tubes and will enter'the chamber 20 formed in the upper head. rlhe tubes 11 communicate with this chamber and the li uid will therefore pass downwardly throug these tubes and will thus enter the chamber 24 in the lower head. From here the liquid passes upwardly throu h the tubes l2.and enters the upper cham er 21. It then passes downwardly through the tubes 13 and enters the chamber 25 in the lower head where it again discharges in an upward direction through the tubes 14, thus entering the chamber 22 in the upper head. The liquid again passes in a downward direction through the tubes 18, and enters the chamber 26, which communicates with the tubes 16. The liquid again passes upwardly and finally enters the chamber 19 which communicates with the radially disposed extension 21 and as this forms a discharge outlet for the liquid and is connected with a pipe 37, it can readily be seen that the li uid is permitted to discharge.

qFrom the foregoing it can be seen that the liquid alternately passes in an upward and a downward direction, and that seven sections of tubes are passed through before the liquid is finally permitted to discharge. In many instances it is desirable to maintain a liquid under high velocit and under considerable agitation when eating the same. This is readily accomplished in the present instance as the area of the several pipes in each section is fairly restricted and as such causes the liquid to travel at a high Velocity; the liquid being of course maintained under more or less pressure by a pump or other means not here shown. The several sections of tubes are all exposed to the same heating medium and as the liquid must pass through the several sections before discharging, it can readily be seen that a large heating surface is presented and that it is therefore possible to obtain high velocit yAnother feature of importance is the fact that agitation is obtained at each end of each group of tubes, that is the liquid dischargln from one group of tubes is deflected dy the cover plate of the adjacent head an is then directed through the next group of tubes. In this manner agitating the liquid and causing a uniform exposure and eating of all `the liquid passing through the tubes.

Another important feature is the provision of a heater in which all parts are free to expand without danger of imposing unnecessary strains or producin leakage between the connected parts. 'l is is accomplished by securing the respective heads to the perforated inner shell 4. This shell is free to expand longitudinally, due to the slip joint 9 provided, that is the tubes supported between the heads may be rolled or otherwise secured therein and any expansion or contraction caused by the tubes will therefore cause the heads to slightly separate or draw toward each other as the case may be, but suclnmovement is of course permitted due to the slip joint 9 provided. Any variation in expansion between the outer shell 5 and the inner shell 4 is taken care of by the upper Z-shaped flange 6 as this is constructed of a lighter material than the lower flange 7 'Ihe variation in expansion however is so small that the flange 6 is subjected to comparatively little strain.

Another important feature of the invention .is the provision of a structure which permits the tubesto be readily cleaned, for instance, when handling milk and other hquds, 1t is not only necessary that the tu es through which the milk or liquid passes be cleaned from day to da but also that they be sterilized and otherwise treated. flhis is readily accomplished in the present instance as the upper and lower covers 27 may be opened, thus exposing the ends of the tubes and permitting insertion of wire brushes, scrapers, etc.

In the present instance I have shown the respective heads as divided into four separate compartments, and I have previously stated that both heads are identical in con'- struction. Such identity in construction is permitted in the present instance as it is only necessary to turn one head one-eighth of a revolution with relation to the other, as shown in Fig. 2, to cause the compartments to alternately register as shown in that figure. I however wish it understood that more or'less compartments may be provided, if desirable, and similarly that a greater or less number of groups of tubes may be employed. Also, that the materials and finish of the several parts employed may be such as the experience and judgment of the manufacturer may dictate or varying conditions may demand.

Having thus described my invention, what Lumen I claim and desire to secure by Letters Patent is- 1. In a heater, an inner shell divided into two telescoping sections forming a slip joint to provide'for expansionand contraction, a head secured to t e outer end of each shell section, an exterior shell, means for expansively connecting the exterior shell to the inner shell sections, means for introducing and circulating a heating medium through the inner shell, a plurality of chambers formed in the respective heads, and a plurality of tubes rigidl secured at their ends in said heads and orming a communication between the chambers in the respective heads.

2. In a heater, a shell composed of two sections, the inner end of one section being contracted and the inner end of the other section being flared whereby the inner ends of the sections may have telescoping connection to provide a slip joint to permit of expansion and contraction, a head secured to the outer end of each shell section, an exterior shell having connection with the aforesaid shell sections, means for introducing and circulating a heating medium through the inner shell sections, a plurality of chambers formed in the respective heads and a plurality of tubes rigidly secured at their ends in said heads and forming a communication between the chambers in the respective heads.

3. A heater comprising a cylindrical shell, said shell being perforated and being divided into two sections to form a slip loint, a head secured to each end of the she an exterior shell secured to the perforated shell sections, means for introducing and circulating a heating medium through the exterior and the interior shell, a p urality of chambers formed in the respective heads, and a plurality of tubes secured between the llc-ads and forming a communication between the chambers in the respective heads.

4. In a heater of the character describe-d a cylindrical shell, consisting of two perforated sections telescoping with relation yto each other to form a slip joint, an annular flange secured at each end of the erforated shell, said flanges being Z-shape in cross section, an exterior shell secured to the Z iianges', a head member secured to each end of the orated shell, tubes secured between t e head members, a plurality of chambers formed in each head with which the tubes communicate, and means for introducing a liquid to one of the heads and for discharging it from the op osite head.

DAVID D. EEBLES.

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