US1811608A - Auxiliary apparatus for steam generators - Google Patents

Description

June 2", 1931. A. w. BRUCE AUXILIARY APPARATUS FOR STEAM GENERATORS Filed Aug. 15, 1929 ndFT ed W. Bruce %4%@ R EY Patented June 23, 1 931 UN TEDj j sTATE-s ALFRED EUcE, OF NEW Yonx, N. Y. I

PATENT OFFWE AUXILIARY Arr LA'rUs FOR STEAM GENERATORS Application fi1e'd August 13,1929. Serial No. 385,659.

adapted for use with high pressurejsteam.

nomically manuactured and maintained, and

which is highlyeflicient in. Operation.

Another object of the'invention is to provide acom'bined economizer and superheater, of simple, economical and compact construc tion, and of high efliciency in operation. Otherobjects of the invention will hereinafter readily appear. a

The improvement claimed is hereinafter fully set forth.

In the accompanying drawings: Figure 1' is a side elevation withportions broken away of a combined economizer and superheater embodying the invention ;'Fig. 2, a fragmentary, end view of the construction shown in F ig. 1, two of the vertical rows .of economizer and superheater tubesbeing shown; .Fig. 3, a fragmentary view in horizontal section taken on theline IIIIII', of'Fig.'.1; and,

Fig. 4, a fragmentary view, partlyin hori-,

zontal sectiontaken on the line IVJ-IV of Fig. 1.

In the practice of the-invention referring descriptively to the specific embodiment iments are dlvlsions of larger units.

thereof which has been selected for exemplification herein, the economizer comprises a plurality of superposed longitudinal water tubes 10, arranged in parallel vertical rows.

The tubes of each row are connected at one end in pairs by return bends 10a. At the other end the lower tubeofthe bottom-pair is connected to a header compartment 11, the upper tube of that pair is connected to' a header compartment 11a, 'to which compartmentthe lowertube of the next superposed pair: is also connected. This general arrangement is followed throughout eachof the vertical rows. Each water tube 10, has. concentrically extending therethrough, a fire tube '12. Thus a waterspace 13,.circular' in cross-section isprovidedbetween each water tube and each 11, of each row is connected to a separate infire tube. Thelower header compartment talce pipe 14, which may be connected toa sultable common header, not shown, or if deslred to an individual feed pump}, Also if sure efficient blowing-oil" of the tubes. The

top header of each row is connected to a dis-- charge pipe, 15, which communicates with a desired a separate valve may be providedfor 'closlng off any of the intake pipes 14, to incommon header 16. A separate valve 17 is provided at the header 16, for each of. the

discharge pipes 15, so that the tubes of any :desired rows may be closed off selectively to facilitate efficient blowing-off. v r

From the foregoing description, it will be obvious thatwater circulates through all of the water tubes 10, of each row in a continuous path leading from the lowermost Water tube of each row through the uppermosttube 7 thereof."

It is to be noted that each of the superposed pairs of water tubes is made of shorter length than the pair next below so that at the return bend end of the economizer, the pairs of tubes of each row are stepped to provide; for economy of space for the application of the superheater tubes. header compartments 11a, is formed as a separate unit adapted to connect two superposed pipes of different pairs, it is within the contemplation of the invention to utilize constructions wherein the header compart- Hollow cylindrical fittings. are screw threaded in the headers 11 and 11a, one for each fire tube. These fittings serve to seal the headers so as to permit thepassage of the fire escape of the circulating header 18, which may be formed with the While each of the usual saturated and superheated steam compartments; and a plurality of steam circulation tubes 18a. p It is to be noted. that the vertical reaches 7 18b and of the respective steam circula- I tion tube units are made I progressively shorter, those leading to the bottom fire tubes being the longest, and those leading tothe top fire tubesbeing the shortest. This form of superheater tubes in conj unction' with the progressively shortened tubes of the economizer, provides a compact construction effecting a considerable saving of space in the locomotive superstructure.

IVhile one of the preferred forms of construction has been described and shown, it is obvious that many variations in procedure, form, arrangement, and construction of parts, may be resorted to, and the invention, therefore, is not limited to the particular embodiment disclosed, but includes such "changes and modifications as come Within the spirit and scope of the invention as set forth in the appended claims.

The invention claimed and desired 'to be secured by Letters Patent, is:

1. In an apparatus for locomotives, the combination of an economizer comprising a plurality of superposed water tubes arranged in vertical rows, the tubes of each row being connected at their rear ends in pairs by separate, spaced, return bends to permit the flow of combustive gases loi-igitudinally between said tubes, means for connecting the opposite ends of the tubes to permit the circulation of Water therethrough, and a plurality of fire tubes each passing through one 7 of the water tubes.

2. In an apparatus for locomotives, the combination of an economizer comprising a plurality of superposed longitudinal Water tubes arranged in vertical rows, the tubes of each row being connected for communication at their rear ends by separate, spaced,.couplings to permit the flow of combustive gases longitudinally between said tubes, header compartments at the other end of the tubes,

each compartment coupling for communica-.

tion one tube of one pair with one tube of another pair, and a plurality of fire tubes, each passing through one of the water tubes.

8. In an apparatus for locomotives, the combination of an economizercomprising a plurality of superposed longitudinal. Water tubes, arranged in vertical rows, the tubes of each row being connected at their rear endsin pairs by separate, spaced, return bends to permit the flow of combustive gases longitudinally between said tubes, header compartments at the other end of the tubes, each compartment coupling for communication one tube of one pair with one tube of another pair, and a pluralityot fire tubes, each passing through one of the Water tubes.

4. In an apparatus for locomotives, the combination of an economizer comprising a plurality of superposed longitudinal Water tubes arranged in rows With the tubes of each row connected at their rear ends in pairs by separate, spaced, return bends to permit the flow ot combustive gases longitudinally be tween said tubes, means tor connecting the.

opposite ends of the tubes to permit the circulation of Water therethrough, and a plurality of [ire tubes each passing through one culation of Water therethrough, and a plurality of'fire tubes, each disposed substantially concentric .of and passing tlllOIlghOIlG of the Water tubes, and a superheater comprising a header and a plurality of steam circulation tubes eXtendingi-nto'the .fire tubes of the economizer.

6. In an apparatus for locomotives, the combination of .an economizer comprising a plurality of superposed water tubes arranged in vertical rows, the tubes ofeaeh row being connected at their rear ends in pairs by sepa rate, spaced, return bends to permit the Files of combustive gases longitudinally between said tubes, means for-connecting the opposite ends of the tubes .to permit the circulationrof Water therethrough, and a plurality of fire tubes each passing through one ofthe Water tubes; and a superheater eomprisinga header and a plurality of steam circulation tubes extending into the fire tubes of the economizer.

7. In an apparatus for locomotives. the combination of an economizer comprising a plurality of superposed longitudinal Water tubes arranged in vertical rows, the tubesro'f each row being connected at their rear ends in pairs by separate spaced, return bends to permit the flow of combustive-gases longitudinally between said tubes. header compartments at ithe other end of thetubes, each -eachrow being connected at their rear ends in pairs by separate, spaced, return bends to permit the flow of combustive gases longitudinally between said tubes, header compartments at the other end of the tu-bes,'each compartment coupling for communication one tube of one pair With one tube of another pair, and a plurality V of fire tubes, each passing through one of the Water tubes; and a superheater comprising a header and a plurality of steam circulation tubes: extending into the fire tubes of the economizer.

9. In an apparatus for locomotives, the combination of an economizer comprising a plurality of superposed water tubes arranged in vertical rows, the tubes of each row being connected at one end in pairs by return bends, means for connecting the opposite ends of the tubes to permit the circulation of Water therethrough, and a plurality of fire tubes each passing through one of the made successively shorter; and er comprising a header and a plurality of steam circulation tubes, each formed with an upstanding portion adjacent the header, and a portion extending into a fire tube of the a superheat economizer.

10. In an apparatus for locomotives, the combination of an economizer comprising a plurality of superposed water tubes arranged in vertical rows, the tubes of each row ing connected at one end in pairs by return bends, means for connecting the opposite ends of the tubes to permit the circulation of Water therethrough, and a plurality of fire tubes each passing through one of the water tubes, the pairs of Water tubes at one end being made successively shorter; and a superheater comprising a header and a plurality of steam circulation tubes, each formed with an upstanding reach, a reach leading into one of the fire tubes, a return bend Within the fire tube, a reach leading out of the fire tube, a return bend leading to a second fire tube, a reach leading into that fire tube, a return bend Within the second ing out of the second fire tube, and a second upstanding reach leading to the header.

11. I combination of an economizer comprising a plurality of superposed longitudinal water tubes arranged in rowsiwith the tubes of each row connected at their rear ends lnpairs by V 7 separate, spaced, return bends to flowof combustivegases longitudinally betweensaid tubes, means for connecting the opposite ends of the tubes to permit the circulation of Water therethrough, and a plupermit the rality of fire tubes each passing through one of the Water tubes.

ALFRED W. BRUCE.

water tubes, w the pairs of Water tubes at one end being fire tube,a reach lead-' 11 an apparatus forlocomotives, the

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