US1842235A

US1842235A - Water tube boiler

Info

Publication number: US1842235A
Application number: US372615A
Authority: US
Inventors: John A Barnes
Original assignee: Superheater Co Ltd
Current assignee: Superheater Co Ltd; Superheater Co
Priority date: 1929-06-21
Filing date: 1929-06-21
Publication date: 1932-01-19
Anticipated expiration: 1949-01-19

Description

Jan. 19, 1932. .J. A. BARNES WATER TUBE BOILER Filed June 21, 1929 2 Sheets-Sheet l INVENTOR ATTORNEY Jan. 19, 1932. J. A. BARNES WATER TUBE BOILER Filed June 21, 1929 2 Sheets-Sheet 2 INVENTOR JOHN I). BflRNfS ATTORNEY Patented Jan. 19, 1932 UNITED STATES PATENT OFFICE JOHN A. BARNES, OF CHAPPAQUA, NEW YORK, ASSIGNOR TO THE SUPERHEATER COM- PANY, OF NEW YORK, N. Y.

WATER TUBE BOILER Application filed June 21,

My invention relates to water tube boilers and has particular reference to Yarrow or A type boilers, although it may be applied to other forms of steam generators.

A principal object of the invention is to provide a. boiler having a furnace water wall formed of integral tubes, portions of which form a part of the heating surface of the boiler proper. A more specific purpose of H the invention is to provide an improved form of water wall construction for the boiler furnace in which use is preferably made of the bifurcated type of tube disclosed in U. S. Patent #1,676,245 granted to Carl A. Brandt on the th day of July, 1928. and in which the number of joints required to form the desired structure is reduced to a minimum. A still further purpose of the invention is to provide a water wall construction of the character described in which the water wall tubes are extended beyond the confines of the boiler furnace to form a substantially solid water cooled battle for directing the furnace gases over the tube bank or banks of the boiler.

' The invention further consists in the novel arrangement of elements and particulars of design which may best be understood from the ensuing description of preferred embodiments of the invention illustrated'in the accompanying drawings in which Fig. 1 is a transverse section through a Yarrow boiler embodying the invention; Fig. 2 is a fragmentary central longitudinal section of the boiler shown in Fig. 1; Fig. 3 is a fragmentary section taken on the line 33 of F1g.

2; Figs. 4 and 5 are respectively fragmentary transverse and longitudinal sections showing a modified form of the invention; Figs. 6 and 4 are views s1m1lar to Figs. at and a of still another modification; Fig. 8 is a fragmentary section on an enlarged scale taken on the line 8-8 of Fig. t; Figs. 9 and 10 are views similar to Figs. 6 and 7 of another modification of the invention. and Figs. 11 and 12 are views similar to Figs. 9 and 10 of still another modification. Referring now to Fig. 1 the boiler illustrated is of the Yarrow type comprising an upper steam and water drum 1 and a pair of spaced

lower water drums

2 and 3, the latter being connected re- 1929. Serial No. 372,615.

to drum 1 by the tube banks 4 of the tube banks 4 and 5 there is located a. row of bifurcated tubes 6 and 7, each of said tubes being bifurcated at point 8 between the upper and lower drums.

As will be seen more clearly from Fig. 2, the tubes 6 and 7 comprises single upper portions 6a above bifurcations 8, these portions being preferably spaced substantiallv the same distance apart as the longitudinal spacing of the tubes in banks 4 and 5. so that the portions 6a: of the bifurcated tubes form in effect the front row of water tubes of the tube banks. Below the bifurcations the dual lower portions 67) extend downwardly in substantially contacting relation to forin battles 9 in front of the lower portions of the tube banks. As will be noted from Fig. 1 the tube portions (in and 67) above the level of the lower drums are substantially parallel to the tubes of the tube banks. Below the lower drums. the portions 66 of the tubes are preferablv bent to extend vertically downward to form substantially solid side walls for the furnace 10. At their lower ends. the portions 67 are preferably bent outwardly and ioined by a second series of bifurcations 11. therebv providing single lower end portions 12 which are connected into headers 13 which lie parallel. to and below the lower boiler drums. Headers 13 are in turn connected with the boiler. preferably by means of risers 14 entering the lower boiler drums. Battles 15 are provided to direct the furnace gases over the tubes in the manner shown by the arrows in Fig. 1.

In the form of construction shown in Fig. 4. the arrangement is essentially the same as that already described, the only difference being that the bifurcations 8a are located substantially at the level of the lower boiler drums so that the gas pass provided between the upper single portions of the bifurcated tubes extends the full distance from the upper to the lower drum. This construction is utilized where it is desired to have a single pass boiler with the products of combustion passing directly through the tube banks in a substantially undeflected path.

In the modification shown in Fig.6 the bifurcations 8b are placed adjacent the upper drum and the same gas path shown in Fig. at is obtained by arranging the bifurcations 8?) at an angle with respect to the longitudinal axis of the boiler so that the portions of the tubes lying between the bifurcations and the lower drum are arranged in a longitudinally staggered row. Below the level of the drum, the lower portions of the tubes are bent into a single plane as shown in 6, to form a substantiallv solid furnace water wall and are joined by second bifurcations and connected into the boiler preferably in the manner already described.

A slight variation of the form shown in Fig. 6 is shown in Figs. 9 and 10. the same general arrangement of the front row of tubes with respect to spacing and gas flow being obtained by bending one of the lower tube portions of each of the bifurcated tubes out of line with the other in a plane transverse to the boiler axis to form a staggered tube row. Below the level of the lower boiler drum. the lower portions of the bifurcated tubes are again bent into a single plane to form the furnace water wall.

In the form shown in Figs. 11 and 12. the front tube rows are formed of single tubes which are rolled into the upper drum in staffgered relation and extend downwardlv therefrom parallel to each other to form a staggered tube row extending substantially to the level of the lower drum. at which point they are bent into a cotnmon plane extending downwardly to foim a solid water wall for the furnace. In order to utilize the minimum s ze of headers to which the lower ends of these tubes are connected. and at the same time to provide the necessary ligament strength in the header. alternating tubes are bent out of line adjacent to the lower header so that the tubes enter the header in staggered relation in the same manner as they are secured to the upper drum.

It will be obvious that the several embodiments herein described may be considerably modified without departing from the spirit of the invention. For example. the bifurcated tubes shown may be modified to provide a single upper portion integrally connected to more than two lower portions. and it is to be understood that the term bifurcated is intended to cover such modified forms of construction. It will further be obvious that other arrangements of the tubes forming the water walls and front rows of the tube banks may be employed without departing from the invention which is to be considered as limited only by the scope of the appended claims.

I claim:

1. A boiler comprising a steam and water drum, a water drum, abank of inclined tubes connecting said drums, a row of tubes enerally parallel to and in front of said tube ank, said last named tubes being connected at their upper ends to the steam and water drum and extending and closely spaced below the water drum to form a substantially solid furnace wall and relatively widely spaced above the level of the water drum to permit combustion gases to pass therebetween, and means for supplying water from the boiler to the lower ends of said tubes.

2. The combination according to claim 1 in which the front row tubes are closely spaced for a substantial distance above the lower drums to form a bafile in front of the lower portion of the boiler tube bank.

3. A boiler comprising an upper steam and water drum, spaced lower water drums, banks of vertically inclined water tubes connecting the steam and water drum with each of the water drums, a'row of water tubes extending from the upper drum in front of each of said banks of tubes and generally parallel therewith to a point substantially below the tops of the lower drums, the tubes of said rows being closely spaced below the level of the lower drums to form substantially solid furnace water walls, and means for supplying water from the boiler to the lower ends of said tubes.

4. A boiler comprising a steam and water drum, a water drum, a bank of inclined tubes connecting said drums, a row of bifurcated tubes disposed generally parallel to and infront of said bank, the single portions of said tubes above the bifurcations being connected with the steam and water drum and the dual portions below the bifurcations extending below the level of the water drum in closely spaced relation to form a substantially solid furnace water wall, and means for supplying water. from the boiler to the lower ends of said bifurcated tubes.

5. A boiler comprising a steam and water drum a water drum, a bank of inclined tubes connecting said drums, a row of bifurcated tubes disposed generally parallel to and in front of said bank, each of said tubes being bifurcated at a point intermediate said drums. the single portions of the tubes above the bifurcations being connected to the steam and water drum and spaced to permit com-- bust-ion gases to pass therebetween, and the portions below the bifurcations extending in closely spaced relation below the level of the water drum to form a substantially solid furnace water wall and a bafile in front of the lower portion of said tube bank, and means for supplying water from the boiler to the lower ends of said bifurcated tubes.

6. A boiler comprising an upper steam and water drum. a pair of spaced lower water drums. a bank of inclined water tubes connecting the upper drum with each of the lower drums, a header generally parallel to and below each of the lower drums, a row of water tubes generally parallel to and in front of each of said tube banks, each of said rows connecting the upper drum with one of said headers and comprising tubes having single relatively widely spaced end portions and relatively closely spaced bifurcated intermediate portions forming a substantially solid water wall extending both above and below the level of the lower drums, and means connecting each of said headers with the lower portion of the boiler.

T. A boiler comprising an upper steam and water drum, a lower water drum, a bank of inclined water tubes connecting said drums, arow of tubes generally parallel to and in front of said bank, each of the tubes of the front rows being bifurcated substantially at the level of the lower drum and comprising a single portion extending upwardly from the bifurcation to connect with the upper drum and substantially contacting dual por tions'extending downwardly from the bifurcation to form furnace walls, the spacing of the said front row tubes being such that substantially solid water walls are formed be low the water drums, and means connecting the lower ends of said front row tubes with the lower portion of the boiler.

8. A boiler comprising an upper steam and water drum, a lower water drum, a bank of inclined water tubes connecting said drums, a row of tubes generally parallel to and in front ofsaid bank, each of the tubes of the front rows being bifurcated adjacent to the upper drum and comprising a single portion extending upwardly from the bifurcation to connect with the upper drum and dual portions extending downwardly from the bifurcation to a point below the level of the lower drum, the parts of said lower portions between the bifurcations and the lower drum being spaced and arranged in staggered relation, and the parts of the lower portions below the lower drum being bent into a single plane in substantially contacting relation to form a substantially solid furnace water wall, and means connecting the lower ends of said front row tubes with the lower portion of the boiler.

9. A boiler comprising an upper steam and water drum, a lower water drum, a bank of inclined water tubes connecting said drums, a header parallel to and below the lower drum a plurality of tubes connecting the upper drum and said header, the portions of said tubes above the lower drum being arranged in spaced staggered relation generally parallel to and in front of said bank and the portions of said tubes below the lower drum being arranged in substantially contacting relation in a single plane to form a substantially solid furnace water wall, and

means connecting said header with the lower portion of the boiler.

10. A boiler comprising means for enclosing steam and water, a water drum, a bank of tubes connecting said water drum with the space within said means, a row of tubes generally parallel to and in front of said bank, said last named tubes being connected at their upper ends with the space within said means and closely spaced below said water drum to form a substantially solid furnace wall and relatively widely spaced above the level of the water drum to permit combustion gases to pass therebetween, and means for supplying water from the water space of the boiler to the lower ends of said tubes.

11. boiler comprising means for enclosing steam and water, a water drum, a bank of tubes connecting said drum and the space within said means, a row of bifurcated tubes disposed generally parallel to and in front of said bank, the single portions of said tubes above the bifurcations being connected with the space within said means and the dual portions below the bifurcations extending below the level of the water drum in closely spaced relation to form a substantially solid furnace water wall, and means for supplying water from the boiler to the lower ends of said bifurcated tubes.

12. A boiler having means for enclosing steam and water, a water drum, a bank of tubes connecting the space within said means with said drum, a row of bifurcated tubes disposed generally parallel to and in front of said bank, each of said tubes being bifurcated at a point intermediate said drum and said means, the single portions of the tubes above the bifurcations being connected to the steam and water space within said means and arranged to permit combustion gases to pass therebetween, and portions below the bifurcations extending in closely spaced relation below the level of the water drum to form a substantially solid furnace water wall and a bathe in front of the lower portion of said bank, and means for supplying water from the water space of the boiler to the lower ends of said bifurcated tubes.

JOHN A. BARNES.