US1363714A - Boiler with superheater - Google Patents

Description

B. BROIDO.

BOILER W |TH SUPERHEATER. APPLICATION FILED DEC. 31, 1917.

5 SHEETSSHEET I.

B. BROIDO. BOILER WITH SUPEHHEATER.

APPLICATION FILED 050 31, 1917.

1,363,71 4. Patented Dec. 28, 1920.

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BOILER. WITH, SUPERHEATER. APPLICATION FILED DEC. 31, 1917.

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B. BRO IDO.

BOILER WITH SUPERHEATER.

APPLICATION FILED DEC. 3?, 19]].

1,363,714. Patented Dec. 28, 192m 5 SHEETS-SHEET 4- IIIIIIIIIIIII/ln 7; Emmi/m EEO/PO alum 351 ///5 WW y y BENJAMIN BROIDO, OF NEW YUBK, N. Y., ASSIGNOR T0 LOOOMO'IIVE SUPERHEATER COMPANY, OF YORK, N. 1., A CORPORATION OF DELAWARE.

BOILER WITH SUPERHEATER.

Application filed December 31, 1917.

To all whom it may concern.

Be it known that I, BENJAMIN Bnolno, a citizen of the United States, residing at New York, N. Y., have invented certain new and useful Improvements in Boilers with Superheaters, of which the following is a specification.

My invention relates to boilers, and has special reference to water tube boilers equipped with superheaters. It has for its principal objects the provision of a space for the superheater which shall be near the fur nace where the gases striking the superheater have not been cooled; which shall be protected from direct radiation from the furnace; which admits of easy regulation of the amount of gases passing over the super heater; which shall be easily removable; and which shall utilize what is ordinarily waste space. Besides these principal advantages secured by my invention there are some minorones which will appear as the description proceeds.

In the superheating art it is becoming more and more possible to employ a high degree of superheat and thus attain the advantages which theory shows are inherent in the use of steam superheated highly. This entails a design of boilers in which the gases of combustion reach the superheater before they are cooled very far or at all by contact with the relatively cold boiler surfaces. Superheaters placed near the olf-take flue, or even behind a bank of the tubes of a water tube boiler, are unable to furnish the requisite degree of superheat, without being increased to inconvenient size.

I am aware that in water tube boilers of the type with which I am here concerned it has been proposed to locate the superheater in a place corresponding roughly to the place employed by me. As illustration U. S. Patent 1,245,005, granted E. C. Meier on *Uctober 30, 1917, may be instanced. The disadvantages in the arrangement there shown are that the radiation from the furnace strikes the unprotected superheater directly, and that regulation with a damper at the point shown is practically out of the question. These difliculties are overcome by the present invention.

In the accompanying drawings illustrating my invention, Figure 1 is a longitudinal Specification of Letters Patent.

Patented Dec. 28, 19241.

Serial No. 209,784.

section of a boiler of a well-known type embodying my invention; Fig. 2 illustrates a modification, Fig. 3 being a fragmentary section on line 3--3 of Fig. 2; Figs. 1, 5 and 6 are sections similar to Figs. 1 and 2, of other types of boilers with my invention apphed; Figs. 7 and 8 are top and sectional news of Fig. 6 respectively, the section for F 8 being taken on line 8-8 of Fig. 6; F igs. 9 and 10 are views similar to Figs. 7 and 8 of a modification.

Referring first to Fig. 1, the boiler setting is designated by 1, and within it is the boiler, which comprises an upper drum 2, a lower drum 3, and banks of tubes 1, 5 and 6. A

baffle 7 is located in the fore part of bank 5, terminating short of the upper drum, and a battle 8 is located in the fore part of the bank 6, terminating short of the lower drum 3. Forward of the bridge wall 9 is the furnace 10, forming a projecting portion in the boiler housing. 11 is the steam pipe carrying away the steam from the upper drum. 12 is the flue by which the gases, after leaving the boiler, escape to the chimney.

As far as described the boiler is of ordinary construction. In such a boiler I place my superheater, which may be either of the construction shown, or any preferred form, in the location indicated in the drawing. The arch 13, in lieu of being extended to close proximity of the bank of tubes 1, and being connected with it by a bafile, terminates some distance forward of it; and some distance above it I place a second arch 1 1, terminating short of the front wall 15 of the boiler. From the inner end of arch 14 the wall 16 extends upward, terminating at a point some distance from the top 17 of the housing. A baffle 18 closes the space between wall 16 and the first of the tubes in bank 1.. The space between the top of wall 16 andthe upper wall 17 of the housing can be partly or wholly closed by means of a damper 19, which in the figure is shown in its upper position, but may be lowered by means of the rods 20, only one of which is visible in the figure. The pipe 11 carries the steam to the superheater 21, andfrom the superheater it is conveyed by the pipe 22. 7

The operation maybe described as follows: The products of combustion, leaving furnace 10, pass, in part, up between the 'tubes'of bank 4, over the top of baffle 7,

' arches, 13 and 141, and,'after passing over the superheater, leave the chamber by way of the opening abovewall 16, rejoining the main current of gases. The proportionate amount of'the gases passing through the superheater chamber can be controlled by the damper 19.

It will be clear that the arrangement proposed has the advantages above pointed out. The superheater units are in no danger of being damaged by the intense direct radiation from the furnace; yet the gases striking the superheater reach it without having been cooled by boiler surfaces; regulation is easy, and the damper isat a place where the heat is not intense enough to make its main tenance difficult. It happens at times, that arches becomeso far weakened that they fall. My second arch in such a case protects the superheater sufficiently so it will not I be damaged until repairs can be made.

The form of my invention shown in Fig. 2 is quite similar to that of Fig. 1. There is here, however, no wall between the super heater 21 and the tubes of the first bank 4. N or is there a damper 19. Adjustment of the amount of gases, however, can here be made by placing-fire bricks 23 on the lower arch in the opening between the two arches. These may be spaced, added to, or diminished in number ,to suit conditions. Access to the passage for this purpose is permitted by the door 24:. Evidently this means of regulating the gas passage may be used 'in the form of Fig. 1 'in addition to the damper, for adjustment of a more permanent nature. Regulation. by this means is quite feasible with the boiler in operation.

In Fig. 4 is shown a boiler of'another t pe with my invention applied. Here t ere are longitudinal top and. bottom drums 2 and 3 connected by banks of tubes between which are baffles to direct the flow of the gases. There may be and inpracti'ce usually is, a plurality of drums 2 and a corresponding number of lower drums 3 As far as the arrangement for the super heater'is concerned, it may be practically a duplicate of the two first described. The figure shows one variation of importance,

7 and that is the inclination of the upper arch 14. His put at an angle sloping up toward the front in order to facilitate the flow of gases into the superheater chamber.

Another form of boiler is shown in Fig. 5. The characteristic of this boiler of interest is that the first bank of tubes is set at a decided angle to the vertical, andgenplaced the superheater 21. Lower arch 13 and upper arch 14 correspond to the similarly designated parts in the earlier figures, and their functions are likewise similar. Gases from the furnacepass through the space between them, pass over the superheater, and rejoin the main current of gases.

Figs. 6 to 8 show a form of boiler with I cylindrical upper and lower drums with their axes vertical and the watertubes connecting bottom and top ofthe drums. The housing in these boilers generally follows the circular outline of the drums, as is shown in the top view, Fig. 7 and in the sectional view, Fig. 8. The Dutch oven furnace extends forward as indicated. I again place my superheater inthe space between the front wall 15 and the partition 16. The two arches 13 and 1 1 are also again arranged as before. The open space above wall 16 is shown divided .into two parts by the column 30, and there are two dampers 19, only one of which is illustrated. space above wall 16 is shown in Fig, 6, as the section for this figure is taken on line 6-6 of Fig. 7 and is not.entir-ely central. Instead of putting wall 16, superheater 21,

The 1' 3* and dampers, straight across, as just de- The action, of all the forms of my invenf tion corresponds closely to that of the form first fully described, and will be too abvious to need further description.

It will be evident that my invention is susceptible of many variations. the forms of the invention shown-in Figs. 1

and 1, the arch 14 may extend inward beyond partition '16. In cases where the superheater is smaller than shown, the charm Thus, in I her in which it is located may be made to conform to its actual size by changing the location of theupper arch or by shortening Such variations the chamber at the top. will occur in practice to any one skilled in this art, but where they come within the spirit of the appended claims, I consider them part of my invention, and want it understood that the appended claims are meant toinclude them.v

What I claim as my invention is:

1. In apparatus of the class described, the combination of a lower and an upper drum, water tubes connecting them, a front wall, a partition parallel to the front wall and between it and the water tubes, an arch extending from the front wall inward and terminating some distance from the water tubes and below the lower end of the partition, a second arch above the first and extending from the partition to a point some distance from the front wall, and a superheater in the space between the front wall and the partition.

2. In apparatus of the class described, the combination of a boiler comprising a plurality of upright water tubes, at setting comprising a front and a top wall, a furnace, an arch over the furnace extending from the front wall inward and terminating some distance from the water tubes, a second arch above the first and extending from a point near the water tubes toward the front wall and terminating short of it, a partition extending upward from the inner end of the upper arch and terminating short of the upper wall of the setting, a superheater lo- 'cated in the space between the front wall and the partition, and a damper adapted to regulate the size of the opening above the partition.

3. In apparatus of the class described the combination of upright water tubes, a setting comprising a front wall parallel to the water tubes and a top wall, a furnace, an arch over the furnace extending from the front wall inward and terminating some distance from the water tubes, a second arch above the first and extending from a point near the water tubes toward the front wall and terminating short of it, the front wall having an opening opposite the space between the two arches, and adjustable means accessible through said opening to restrict the passage between the two arches.

a. In apparatus of the class described the combination of upright water tubes, a setting comprising a front wall parallel to the water tubes and a top wall, a furnace, an arch over the furnace extending from the front wall inward and terminating some distance from the water tubes, a second arch above the first and extending from a point near the water tubes toward the front wall and terminating short of it, a partition extending upward from the inner end of the upper arch and terminating short of the upper wall of the setting, a superheater located in the space between the front wall and the partition a damper controlling the opening above the partition, the front wall having an opening opposite the space between the two arches, and adjustable means accessible through said opening to restrict the passage between the two arches.

5. In apparatus of the class described, the combination of a wall, an arch extending at substantially right angles from said wall, a second arch above the first and terminating at a point spaced from the wall thus providing a passage between the two arches and between the upper arch and the wall, and adjustable means comprising loose bricks placed in the passage to restrict it, the wall being provided with an opening permitting access to the bricks.

BENJAMIN BROIDO.

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