US1775079A - Superheater boiler - Google Patents

Description

Sept. 2, 1930. w. A. JONES SUPERHEATER BOILER 3 Sheets-Sheet 1 Filed July 29. 1922 ATTORNEYS 3 Sheets-Sheet 2 .ATTORNEYS W. A. JONES SUPERHEATER BOILER Filed July 29. 1922 Sept. 2, 1930.

Sept. 2, 1930. w A O E 1,775,079

SUPERHEATER BOILER Filed July 29 l922. 5 Sheets-Sheet 3 lllli.

INVENTOR.

Maw-aka. M

Patented Sept. 2, 1939 FATE? OFIE WILLIAM A. J ONES, OF WEST NEW BRIGHTON, NEW YORK, ASSIGNOR TO THE BABCOCK & WILCOX COMPANY, OF BAYONNE, NEW JERSEY, A CORPORATION OF NEW JERSEY SUPERHEATER BOILER Application filed July 29,

My present invention relates to steam boilers in which a superheater is provided.

One of the objects of my invention is to provide means by which the superheater may be suspended from boiler parts. Another object of my invention is to provide means by which a superheater may be suspended amongst water tubes from such water tubes or associated boiler parts with battles to protectthe headers of the superheater.

Fig. 1 with'modifications; Fig. 4 is an elevation, partly in section, of a portion of the water tube boiler similar to that shown in Fig. 1, but with the superheater of a slightly different construction; Fig. 5 is a section of Fig. 4 taken on the line 55 of Fig. 4; Fig. 6 is a view similar to Fig. 4 showing a modified form of my invention; Fig. 7 is also similar to Fig. 4 showing still another modification; Fig. 8 is a view similar to Fig. 4' in which the superheater headers are suspended directly from the water tubes; Fig. 9 is a section on line 9-9 of Fig. 8; Fig. 10 is a portion'of Fig. 8 taken on line 10-10 of Fig. 12; Fig. 11 is a plan view of Fig. 10 with the header omitted; Fig. 12 is a section on line 12 12 of Fig. 11 ;.Fig. 13 is an enlargement of a portion of Fig. 9; Fig. 14 is a section on line 1414 of Fig. 13; Fig. 15 is an end view of one of the plates shown in Fig. 13, and Fig. 16 is an enlarged sectional view of one of the fastening devices used in Fig. 13.

Like reference characters indicate like parts in the several views.

In the boiler shown in Fig. 1, which I have chosen for purposes of illustration, the water tubes are horizontally inclined and formed into a lower-bank 10 and an upper bank 11 with a space 12 between them. The tubes are connected by the usual headers to a steam and water drum 13. The boiler has a furnace 1922. Serial No. 578,294.

having a high furnace chamber 14 over a pair of opposed underfeed stokers 15 and 16.

Located in the space 12 is a double super heater having an inlet header 17 extending across this space between the side walls of the boiler setting and connected by a pipe 18 with the steam space of the drum 13. Similarly, an outlet header 19 extends across this space and also auxiliary headers 20 and 21, these latter being connected with each other and also through U-tubes 22, 22, with the outlet and inlet headers. The U-tubes extend in the same general direction as the water tubes, and the boiler is provided with a baffle 23 along the uppermost row of tubes of the lower bank 10 to a point adjacent the superheater headers. Bafiies 24 and 25 direct the gases back and forth across the tubes after they have passed the superheater and direct the gases to-the gas outlet 26. The spaces between the several headers may be closed by ,suitable battles, so that such bafiles and the headers constitute an extension of the bafiie 24 to the baffle 23.

In modern practice, the space between the side walls of boiler settings is quite wide and, because of the varying conditions which may arise within the superheater, the headers are subject to strains which tend to distort them. I provide means by which these headers may be supported throughout their length, and yet in such a manner that a relative motion, due

to expansionand contraction of the headers, will be permitted in each header in relation to the other header and also to the boiler parts- Tn Fig. 2, I have shown one form of my invention, in which the header 19 has formed thereon a fin 27 which may be divided into sections, as shown, for instance, in Fig. 5. This fin or these fins may be joined to the header body 19 by welding either electrically or autogenously. The bafiie 24 will be provided, as usual, with a backing plate 28, and the fin 27 will be placed against this plate and connected thereto by bolts 29 passing through holes in the fin 27 and holes in the plate 28. Preferably, one or both sets of these holes will be slotted in a direction parallel to the direction of the header, so that the header may move lengthwise of its axis without straining or tearlng apart the suspension fasteners. As shown in Fig. 2, the fin 27 is protected from the heat of the firstpass by..-

a heat insulator, such as the plastic asbestos composition 30.

Fig. 3 is similar to Fig. 2 except that the header is supported by a suspension fastener in Fig. .6, and which will be described in connection with that figure.

In thearrangement shown in Fig. 4, the superheater issingle with the outlet header 19 connected to the inlet header 17 by a dou- ,ner and as best shown in Fig. 5.

ble row of tubes 22. The inlet header 17 is supported from the plate 28 in the manner already described in connection with Fig. 2, and is also provided with a fin or fins 33 on the side opposite'the fins 27 and formed in a similar 'manner. The outlet header 19 is provided with fins 34 on its upper side similar to the upper fins of the inlet header l7, and the fins 33 and 34 are connected by fasteners 35 passing through holes in the two .fins. One of these sets of holes may be slotted longitudinally of the axes. of the headers. A battle 36 is placed partly surrounding and in front of the headers to connect the lower end of the bafiie 24 with the longitudinal baflle 23. In the form just described,

both headers are suspended from the plates 28 which, in turn, it will be understood, are engaged by the water tubes in the usual man- In the arrangement shown in Fig. 6, the

inlet header 17 is beneath the bafile 24 and connected to the plates 28 in the manner which I have ust described, by means of the fins 27. A second fin 37 extendsfrom the lower side of this header into the horizontal bafile 231 forming a more complete connection with that battle and also to better support the battle 38 in front of the header.

3 Plates may be bolted to the fin 37 to susstruction which will be pend the superheater tubes 22, these plates having holes through which such tubes pass in a manner which will be described more in detail in connection with Figs. 9 to 16. Members 51 may be providedbeneath the header 19 to transmit some of the weight thereof to the tubes 10, these members having a concifically hereinafter.

In Fig. 6, the outlet header 19 is supported directly from the water tubes by means of suspension hangers 39 connected to a fin 4O pointed out more spe-- ed thereon to form a steam-tight joint. The

inlet header 17 has an L-shaped member 42 formed as a bolt on its upper end which passes through a hole in the plate 28. This hole may be slotted'longitudinally to permit longitudinal motion of the header 17. Similarly, the header 19 is provided with a studlike member 43 which passes through a plate 44 resting on one or more of the water tubes. It will be understood that as many of the pieces 42 and 43 may be provided spaced along the respective'headers asvmay be necessary to support suchheaders and prevent their, sagging. v

In the arrangement shown in Fig. 8, the headers 17 and 19 are located further away from the lower end of the bafiie 24 and, in-- stead of the header 17 being'conne'cted 'di:

rec tly to a portion of the baflle 24 through the plates 28 it is suspended from the tubes 11 by means of suspension members 52, the weight of the header, of course, being transmitted through these tubes to the entire group of tubes 11 through the plates 28. The header 19 is suspended by the members 39 and the pieces 41 from the upper tubes 11 and also rests on one or more members 51' which, in turn, rest on the tubes 10 and preferably have the shape shown in cross-section in Fig. 12. It will .be noted that the members 51 are unattached to the. tubes 10 and are provided tel with recesses in their upstanding flanges 53 for the header 19. In the form shown in Fig. 8, the right-hand end of the members 51 rests against the downtake headers of the boiler, so that the horizontal component of;

the weight of the header 19 will be transmitted to this vertical header. It should be cause the same effect may be obtained by inserting a portion of the bafiie' between the end of the member 51 and the boiler header.

Preferably, the hangers 39, as well as hangers 43, are positionedto pull at right-angles to the tubes 11, to avoid any tendency to draw the pieces 41 or 41' along the tubes, as might bethe case if the hangers were verticall Any tendency of the headers to move to the right in Figs. 6, 7 and 8 will be resisted by the members 51. If desired, however, the hang-,

ers 41 and 41 may be vertical.

In the arrangement shown in Fig. 8, the

baflle 23 extends from the boiler header to the superheater header 19, a battle 231 extends from the header 19 to the header 17 and a bafiie 232 extends from the header 17 to the battle 24- The combination of these separate invums baflies, together with the headers, constitute therefore a continuous baflie extending from the downtake headers of the boiler to the 1 cross bafie 24.

In the arrangement shown in Fig. 8, the tin 37 of the header 17 has connected to it a series of plates 50, each provided with halfround recesses in each side" in order to fit between the tubes 22 of the superheater, and preferably having their edges formed as shownbest in Fig. '14:, so as to provide an overlap. The upper ends ofthe plates are provided with openings through which pass fasteners as 55, which may have hey-shaped heads 56 by which the fasteners may be readily released. As Will be obvious from an inspection of Figs. 9 and 13, when the plates 50 are attached to-thefin 37, they will support the lower portion of the U-tubes 22, and at the same time, will stiffen the entire combination, providing a substantially continuous plate made up of the plates 50 on the lower side of the header 17.

In the arrangement shown in Fig. 8, the tubes 22 may also be supported by the plates 501 which will be similar to plates 50, but will have their upper ends bent as shown in Fig. 8, to be attached to the lower portion of the plates 28.

In each of the arrangements which I have described, it will be seen that I have provided a means by which superheater headers extending across the boiler beneath some of the tubes thereof may be suspended from the boiler parts, such as bafi les or tubes, and so that the possibility of sagging of the headers between their end supports will be removed. At the same time, the headers. are free to move longitudinally as they will do under the varying conditions to which a superheater is subjected. It will also be seen that the superheater boxes form a part of baflies which {extend across the superheater space, these battles at the same time protecting one of the faces of the superheater boxes so that the possibility of distortion arising from the higher temperature in one other will be eliminated. In each of the arrangements shown, it will also be noted that when the bafiie is made, as indicated, of plates 28. as shown best in Fig. 5, in which these plates extend upwardly and are, in turn, engaged by a plurality of water tubes 11, the weight of the superheater when connected to the water tubes, will, in fact, be carried not by the lower watertubes only, but by all of the water tubes. The battle plates 28,

by connecting the several water tubes, form what is, in effect, a beam made up of all of the water tubes, and therefore strong enough to resist distortion under the weight of the superheater. This efiect is obtained regardless of whether the superheater headers-are connected directly to the plates 28, as shown in all of the figures except Fig. 8, or whether pass than in an- It will be understood that the forms of my invention which I have shown are merely v illustrative, and that the constructions may be widely varied. By forming the suspension member as substantially an integral part of the boxes, I produce a construction which is not only simple, but which is capable of withstanding the action of the heat of the boiler.

I claim:

1. In a superheater water tube boiler, a superheater having a header extending beneath some of the water tubes and means to suspend said header from the tubes of said boiler. the parts being constructed and arranged to permit relative movement between said header and said water tubes.

2. In a superheater water tube boiler, a superheater having a header extending beneath some of the water tubes and means to suspend said header at a point intermediate its ends from the tubes of said boiler above it, the parts being constructed and arranged to permit relative movement between said header and said water tubes. I

3. In a superheater water tube boiler, a superheater having a header extending across and beneath some of the water tubes and means to suspend said header from the tubes 4. In a superheater water tube boiler, a

superheater having a header extending across and beneath some of the water tubes and means to suspend said header at a point intermediate its ends from the tubes of said boiler above it, the parts being constructed and arranged to permit relative movement between said header and said water tubes.

5. In a superheater water tube boiler, a superheater having a header extending beneath some of the water tubes and means to suspend said header from the tubes of said boiler above it, said means comprising a plurality of members spaced along the header, the parts being constructed and arranged to permit relative movement between said header and said water tubes.

6. In a superheater water tube boiler, a

. the header.

it to move longitudinally relatively to "the boiler. parts.

7. In a superheater water' tube boiler. a superheater having a header extending beneath some of the water tubes and means to suspend said header from the tubes of said boiler above it, said means comprising a suspension member permanently connected to 8. In a superheater water tube boiler, a superheater having a header extending beneath some of the'water tubes and means to suspend said header from the tubes of said boiler above it, said means comprising a suspension member permanently connected to the header, and connecting devices between said suspension member and the boiler parts adapted to permit the header to move longitudinally relatively to the boiler parts.

9. In a superheater water tube boiler, a

superheater having a header extending beneath some of the water tubes and means to suspend said header from the tubes of said boiler above it, said means comprising a plurallty of suspenslon members spaced along the header and permanently. connected thereto.

4 10. In a superheater water tube boiler, a

superheaterhaving a header extending beneath some of the water tubes, means to suspend saidheader from the boiler parts above it, said means comprising a plurality of sus pension members spaced along the header and permanently connected thereto, and connecting devices between the suspension members and the boiler parts adapted to permit the header to move longitudinally relatively to the boiler parts. e

11. In ahorizontally inclined water tube boiler having a batlie plate extending across the tubes, a superheater having a header extending across and beneath some of the water tubes and adjacent the lower end of said baffle plate, and means to suspend said headerfrom said baflle plate.

12. In a horizontally inclined water tube boiler having a battle plate extending across the tubes, a superheater having a header extendin across and beneath some of the water tu es and adjacent the lower end of said bafile plate, and means to suspend saidheader from said baffle plate at a point intermediate its ends. v

13. In a horizontally inclined water tube boiler having a battle plate extending across the tubes, a superheater having a header extending across and beneath some-of the water tubes and adjacent the lower end of,

said baflle plate, and means to suspend said header from said balfie plate at a point intermediate its ends, said suspending means comprising a suspension member permanently attached to the header] 14. In a horizontally inclined water tube boiler having a baffle plate extending across along the headers the tubes, a superheater having a header extending across and beneath some of the water tubes and adjacent the lower end of said baffle plate, means to suspend said header from said baffle plate at a point intermediate its ends, said suspending means comprising a suspension member permanently attached to the header, and connecting devices between the suspension member and the baflle plate adapted to permit theheader to move longitudinally relatively to said baflle.

15. In a water tube boiler, two groups of watertubes spaced apart, a cross baflle and bafiie plate in the group of tubes above the space, a superheater in the space having headers extending across the tubes and beneath some of the tubes, and means to suspend the headers from the boiler parts, one of the headers being adjacent the lower end of said cross bafile plate and suspended therefrom.

cross bafile plate and suspended therefrom, and an auxiliary bafile connecting with the lower end of said cross baflle and extending across said space at one side of the headers.

17. In a water tube boiler, two groups of water tubes spaced apart, a cross battle and baflle plate in the group of tubes above the space, a superheater in the space having headers extending across the tubes and beneath some of the tubes, and means tosuspend thelheaders from the boiler parts, one of the headers being adjacent the lower end of said cross battle plate and suspended therefrom, said suspending means comprising a plurality of suspension members spaced and permanently attached thereto. I

a 18. Ina water tube boiler,.a plurality of groups of water tubes spaced apart, a bafile comprising a baffle plate extendingacross one group of said tubes and the space between the groups, asuperheater having a header located in said space, said header being suspended from said battle plate and constituting aportion of said bafile.

19. A superheater header comprising a tubular member and projecting fins extending along the header and on opposite sides thereof and permanently attached thereto, one of said fins being a supporting means for said header. i

. 20. In a superheater water tube boiler having horizontally inclined water tubes, a super heater header extending-across some of said water tubes and a saddle member resting on the water tubes and supporting the header,

the partsbeing constructed and arranged to permit relative movement between said header and said water tubes.

' superheater having inlet and outlet headers extending across the boiler, U-tubes connecting said headers and means suspended from one of the headers to support the U-tubes at points near their entrance into the other header.

23. In a superheater water tube boiler, a superheater havinginlet and outlet headers extending across the boiler, U-tubes connecting said headers and means suspended from one of the headers to support the U-tubes atpoints near their entrance into the other header, said means comprising plates encircling said superheater tubes and connected to said header.

24. In a horizontally inclined water tube boiler, a baflie having a metallic plate engaging a plurality of water tubes in a vertical direction, a'superheater having a header extending across and beneath some of the water tubes and adjacent the lower end of said plate, and means to suspend the header from said plate.

25. In a horizontally inclined water tube boiler, a battle having a metallic plate engaging a plurality of water tubes in a vertical direction, a superheater having a pair of headers extending across and beneath some of the Water tubes and adjacent the lower end of said plate, U-tubes connecting said headers,

' means to suspend one of the headers from said plate, and means to suspend the U-tubes from said header at a point adjacent the other header.

26. In a water tube boiler comprising rows of Water tubes, a superheater, and a support for said superheater comprising members engaging water tubes in a plurality of horizontally extending rows.

27. In awater tube boiler comprising rows of water tubes, a superheater comprising rows of tubes, and a support for said superheater comprising members engaging water tubes in a plurality of rows and also engaging superheater tubes in a plurality of rows.

28. A steam boiler having banks of water tubes connected to water chambers with a space between the banks, and a superheater including headers and superheater tubes and having at least the major portion of its heating surface Within said space, the weight of said headers and said superheater tubes being separately sustained by some of said water a superheater header extubes, the parts being constructed and arranged to permit relative movement between the headers of said superheater and said water tubes.

29. A steam boiler having banks of water tubes connected to water chambers with a space between the banks, and a superheater including headers and superheater tubes and having at least the major portion of its heating surface within said space, said headers and said portion being separately sustained by some of said tubes, the parts being constructed and arranged to permit relative movement between the headers of said superheaterand said watertubes.

30. A steam boiler having tubes connected to water chambers with a space between the banks, a tubular superheater having at least the major portion of its tubular heating surface within said space and having inlet and outlet headers with tubes connecting said headers, the weight of said inlet and outlet headers and said tubular heating surface being separately sustained by some of said tubes, the parts being constructed and arranged to permit relative movement between the headers of said superheater and said water tubes. 31. A steam boiler having banks of water tubes connected to water chambers with a space between the banks, a tubular superheater having at least the major portion of its tubular heating surface within said space and having inlet and outlet headers with tubes connecting said headers, one of said headers being at a higher level than the other, a support for the lower header resting on the lower bank of boiler tubes, and a support'tor the upper header connected to tubes of the upper bank.

32. A steam boiler having banks of horizontally inclined water tubes spaced apart, water chambers connected to the ends of said water tubes, a superheater in said space with an upper and a lower. header extending through said space and across the water tubes, superheater tubes extending longitudinally of said water tubes and connecting said headers, said lower header being adjacent the water chamber connected to the lower ends of the water tubes, a support for said lower header resting on the lower bank of water tubes and arranged to transmit its horizontal thrust to the adjacent water chamber, and a suspension support for said upper header connected to the tubes of the upper bank of water tubes.

33. A steam boiler having banks of horizontally inclined water tubes spaced apart, water chambers connected to the ends of said water tubes, a superheater in said space with an upper and a lower header extending through said space and across the water tubes, superheater tubes extending longitudinally of said water tubes and connecting said headers lib said lower header being adjacent the water chamber connected to the lower ends of the water tubes, a support for said lower header resting on the lower bank of water tubes and arranged to transmit its horizontal thrust to the adj acent'water chamber, a refractory wall in'front of said support'and said lower header, a baflie between said lower and said upper headers, and a refractory wall in front of said upper header. 34. A water tube boiler having a setting enclosing the same, a superheater located within the setting and having a headerjextending beneath water tubes of the boiler, and connections for suspending said header from parts of the boiler heating surface extending above it, the parts being constructed and arranged to permit relative movement between said header and said parts of the boiler heating surface. a

WILLIAM A. JONES.-

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