US2610037A - Preheater - Google Patents

Description

Sept. 9, 1952 N. A. ARVINS ETAL PREHEATER 2 SHEETS-SHEET 1 Original Fi led Nov. 11, 1944 5 z \mffiwl m E f WWW m Mn m l..fl A mw www A k, NW N. on 3 Q mad/MY Rb w x NA Sept. 9, 1952 N; A. ARVINS ET AL PREHEATER Original Filed NOV. 11, 1944 2'sHEETs--sHEET 2 INVENTOR NQTHHN a. mzvms, FIBRQHQM LHRVINTZ ATTORNE have ports l3,

Patented Sept. 9, 1952 PREHEATE'R Nathan A. Arvins and Abraham A. Arvintz,

Brooklyn, N. Y Original appiication November 11,1944, Serial No.

563,028, new Patent No. veniber 21, 1950. Divided and 2,530,798, dated No this application February 4, 1947, $erialNo. 726,420

This invention relates to preheaters primarily used for preheating fuel oil for supply to oil burners of various kinds and classes. More particularly, the invention relates to apparatus of the character described employinga header construction having passages through which a fluid, such as fuel oil is supplied to the circulating tubes of the preheater, withmeans for jacketing'the passages to expose the heating medium thereto. Still more particularly, the invention includes a header having means centrally there- 'of for establishing communication with the central portion of the preheater and the heating medium of the preheater.

The novel features of the invention will be best understood from the following description when taken together with the accompanying drawing, in which certain embodiments ofthe invention are disclosed and in which the separate parts are designated by suitable reference characters in each of the views,

2-2 of Fig. 1

tion shown in Fig. 1.

This application is a division of a prior application filed by us November 11, 1944, bearing Ser. No. 563,028 which has now matured into Patent No. 2,530,798.

. In the accompanying drawing, Ill represents themain casing or jacket of the preheater apparatus. The ends of the casing have outward- 1y projecting annular flanges I and-i2. The endportions of the casing, adjacent. the flanges,

I l, l5 and I6 which; in the construction shown, are closed byplugs ll, 18,1 9 and 20.. However, in some instances, these ports may be used to circulate a heating or transfer medium through a chamber 2| of the casing [0.

Atom end of the casing It and detachable with respect to the flange I2 is an oil distributing casing or header: 22'havin'g an annular-flange .23 securedto the flange i2'by circumferentially spaced bolts .24. An oil inlet pipe .25is coupled with the header 22 and-communicates with a passage 26 in the header. .Thehead'eralso has zanoil'outletpassage 21 which communicates with 7 Claims. (015257-240) another passage 28 in 2 the header. Between the passages 26 and 28 is a chamber 29.

At 30 is shown a circulating coil or tube unit. This unit comprises end plates 3! and 32, in which are supported a plurality of circulating tubes, part of which are shown in Fig. 1 of the drawing. The tubes 33 communicate with the passage 26 at one end, and the other end coinmunicates with a chamber 34 in a header 35; the header having a central partition, as seen at 36. Thus, oil passin'g through the tubes 33 into the chamber 34 will then circulate back through the tubes}? into the lower portion of the chamber 29. The oil will then pass from the chamber 29 through the tubes 38 into the other chamber 39 of the header 35, the oil being discharged from the chamber 39 throughthe tubes 40 which open into the passage 28. From the foregoing, it will appear that a back andforth circulation amountconical tube 54, 'With ing to what may be termed four passes is provided. 1 r 4 The header 35 includes an annular coupling flange 4| secured to the end plate 3| by bolts 42. These bolts also pass through an intermediate mounting ring 43 having gaskets 44 at bothsides thereof. The ring 43 is coupled with another larger mounting ring 45 through the medium of a yieldable coupling 46 welded orotherwise secured to each of the rings 43, 45 and of U-shaped cross-sectional form. The coupling 45 provides an expansion coupling between the unit or the header end of said unit and the corresponding end of the casing Ill, bolts 41 being employed'to secure the mountingring to the flange H of the casing l0.

The chamber-2l opens into an annular chamber 48 in the header 22, as seen at 49.

The chamber 43 completelyenvelops the annular reduced portion 50 of the header, within which the passages 26, 28 and 29 are arranged; as will clearly appear from a consideration of Fig.

i 3 of the drawing.

The reduced portion 50 has an end wall 5! which terminates short of the end wall 52 proper of the header 22 and this forms between the wal1s'5i and 52 a circulating chamber 53 which jackets the outer portion of the passages 26,

28 and 29, except where the tubular connectors 26d and 28a bridge the walls 5i and 62; thus, it may be said that the chambers'26, 28' and-29 are completely jacketed on outer surfaces there- Centrally or the reduced portion 1 5a or} the header 22 and centrally of the chamberlza-is a which} is coupled a circu- 3 lating pipe 55 which extends centrally through the chamber 2| to a point short of the plate 3|, as seen at 56. The tube 54 provides a further jacketing of the chamber 29 and this tube opens into the chamber 53.

Centrally of the header 22 and in alinement with the tube 54 is an opening 5! closed by a plate 58, in which is mounted a propeller shaft 59 driven by any suitable means for driving the propeller blades 60, disposed in the chamber 53 at the flared end of the conical tube 54. A suitable packing gland 6| is mounted on the plate 58 and around the shaft 59. With this construction, water or any other fluid heat conducting medium can be circulated through the chamber 2| by forcing the fluid through the tube 55 and into the end of the chamber 2| at the discharge end 56 of said tube and this fluid will then circulate back and enter the chamber 53 through annular chamber 48. In this way, the heating medium or transfer medium maybe kept in constant circulation to provide efficient heating of the oil circulated through the tubes of the unit 30, as previously described.

The end plate 32 of the unit is bolted or otherwise secured to the inner end of the reduced portion 5|] of the header 22, as seen at 62 and suitable packings 63 are provided between the plate 32 and reduced portion and a packing 64 is also provided between the flanges I2 and 23. In like manner, packings 65 are employed between the flange and the mounting ring 45.

The header 22 has upper and lower passages 86 and 61, the latter forming an intake for water or other fluid to be introduced into the chamber 2| whereas the passage 66 may be used as an outlet in the event that a forced circulation is desired through the chamber 2| independent of the circulation previously described. However, when no circulation is provided, the passage 66 serves as means for placing gauge devices or other controls commonly employed in apparatus of the kind under consideration, particularly in the control of temperatures in the water or other medium arranged in the chamber 2|, but these devices are not shown, as they form no part of the present invention.

Mounted in the lower portion of the header 22 is an inlet pipe 68 which passes through a gland 69 in the header and this pipe forms one end of a spiral coil 10 arranged in the chamber 2| around and outwardly of the tubes of the unit 30. The coil 10 extends substantially the full length of the chamber 2|] and extending from the end coil H is a discharge tube 12 which is arranged within the coil 10 and the discharge end 13 thereof passes through a gland 14 at the top of the header casing 22. V

'A suitable heating medium, such as heated water, steam or the like is introduced into the coil I0 through the pipe 68 to heat the transfer medium or fluid in the chamber 2| which in turn heats the oil in the circulating tube of the unit 30, as this oil is circulated back and forth through the unit in the manner previously described.

In this connection, it will be understood that, in referring to a preheater or heat exchanger, this is done to illustrate one adaptation and use of the invention. The apparatus may be used for any purpose and, in some instances, cooling agents will be used, rather thanthe heating agents and the various passages, tubes and chambers may be utilized for the circulation of different types and kinds of fluids, the important factor in the heat exchanger or preheater being that as the coil 10 for cleaning and repair.

contamination is avoided in the event of a break or leak in any of the circulating tubes of the unit 30 and this is particularly desirable when boiler water is circulated through the heating coil 10. It will be understood that the water or fluid in the chamber 2| and associated chambers will be simply a city water supply or waterapart from the boiler water or steam circulated through the coil 10.

It will be understood that, by removing the bolts 24 and detaching the bolts 42 from the plate Al, the jacket I0 including the header 35 can be removed, thus freely exposing the unit 30 as well As and when desired, the unit 3|] may also then be removed by detaching the bolts .62 and this unit may be pulled through the coil 10 without removing this coil. On the other hand, couplings with the ends of the pipes or tubes 68 and I3 may be disconnected and the glands 69 and 14 loosened in the removal of the coil 10. All this can be done without disturbing connections with the pipes 25 and 21 and the pipes or other connections with the passages 66 and 61. Of course, if any connections have been made with the passages |3--|5 inclusive, these connections will have to be uncoupled before the casing H) can be removed, as above stated.

Having fully described our invention, what we claim as new and desire to secure by Letters Patent is:

1. In preheaters employing a casing and a circulating tube unit arranged in the casing, a header closing one end of the casing and communicating with the tubes of said unit, said header having integral means forming inlet and outlet passages in communication with the tubes of said unit for circulating a fluid to be heated therethrough, means integral with the header and in addition to said first named means for placing tubes of said unit in communication, means integral with the header forming a circulating chamber around the passages and last named means in said header, said chamber having an annular opening exposed to said casing adjacent the periphery of the casing, and means centrally of the header exposing said chamber to said casing.

2. In preheaters employing a casing and a circulating tube unit arranged in the casing, a header closing one end of the casing and communicating with the tubes of said unit, said header having integral means forming inlet and outlet passages in communication with the tubes of said unit for circulating a fluid to be heated therethrough, means integral with the header and in addition to said first named means for placing tubes of said unit in communication, means integral with the header forming a circulating chamber around the passages and last named means in said header, said chamber having an annular opening exposed to said casing adjacent the periphery of the casing, means centrally of the header exposing said chamber to said casing, and a tube extending from said last named means into the casing.

3. In preheaters employing a casing and a circulating tube unit arranged in the casing, a header closing one end of the casing and communicating with the tubes of said unit, said header having integral means forming inlet and outlet passages in communication with the tubes of said unit for circulating a fluid to be heated therethrough, means integral with the header andin addition to said first named means for placing tubes of said unit in communication, means with said last named means for creating a forced circulation of a heating medium through said means and said tube.

4. In preheaters employing a casing and a circulating tube unit arranged in the casing, a header closing one end of the casing and communicating with the tubes of said unit, said header having integral means forming inlet and outlet passages in communication with the tubes of said unit for circulating a fluid to be heated therethrough, means integral with the header and in addition to said first named means for placing tubes of said unit in communication, means integral with the header forming a circulating chamher around the passages and last named means in said header, said chamber having an annular opening exposed to said casing adjacent the periphery of the casing, means centrally of the header exposing said chamber to said casing, a tube extending from said last named means into the casing, means in the header in alinement With said last named means for creating a forced circulation, of a heating medium through said means and said tube, and said header having means forming'inlet and outlet passages communicating with the chamber thereof. I

5. In preheaters employing a casing and a circulating tube unit arranged in the casing, a header closing one end of the casing and communicating With the tubes of said unit, said header having integral means forming inlet and outlet passages in communication with the tubes of said unit for circulating a fluid to be heated therethrough, means integral with the header and in addition to said first named means for placing tubes of said unit in communication, means integral with the header forming a circulating chamber around the passages and last named means in said header, said chamber having an annular opening exposed to said casing adjacent the periphery of the casing, means centrally of the header exposing said chamber to said casing, a tube extending from said last named means into the casing, means in the header in alinement with said last named means for creating a forced circulation of a heating r medium through said means and said tube, said header having means forming inlet and outlet passages communicating with the chamber thereof, a coil arranged in said casing around and spaced from said tubes, said coil having inlet and outlet ends extending into and through said header, and means forming sealed mountings of the inlet and outlet ends of the coil in said header.

6. In apparatus of the class described, a casing having an open side, a header mounted on and forming a closure for the open side of the: casing, said header having an outer wall, an annular wall within the header and integrally joined with and spaced from said outer wall by a pair of tubular connectors, said tubular connectors forming intake and discharge passages, means including said tubular connectors and annular wall forming an intermediate by-pass passage in said header, the header having a circulating chamber around said means, annular wall, tubular connectors and opening into said casing, and a tubular portion centrally of the by-pass passage communicating with the circulating chamber of the header and opening into said casing centrally thereof.

7. In apparatus of the class described, a casing having an open side, a header mounted on and forming a closure for the open side of the casing, said header having an outer wall, an annular wall within the header and integrally joined with and spaced from said outer wall by a pair of tubular connectors, said tubular connectors forming intake and discharge passages, means including said tubular connectors and annular wallforming an intermediate by-pass passage in said header,

the header having a circulating chamber around said means, annular wall, tubular connectors and opening'into said casing, a tubular portion centrally of the by-pass passage communicating with the circulating chamber of the header and opening into said casing centrally thereof, and means centrally of the header for supporting a circulating element in the circulating chamber of the header and in alinement with said tubular portion.

NATHAN A. ARVINS. ABRAHAM A. ARVINTZ. REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 395,347 Pratt Jan. 1., 1889 586,498 Kelly July 13, 1897 1,877,322 I-Iulse Sept. 13, 1932 1,936,610 Thomas Nov. 23, 1933 1,951,285 Landgrebe Mar. 13, 1934 1,954,356 How Apr. 10; 1934 2,312,217 King et a1 Feb. 23, 1943

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