US1157965A - Air-superheating device for furnaces. - Google Patents

Description

W. E. SHORE.

AIR SUPERHEATING DEVICE FOR FURNACES.

APPLICATION FILED DEC. 8. I914.

1 15?,965, Patented 001;. 26, 1915.

4 SHEETS-SHEET I.

Wat n e M E. SHORE. MR SUPERHEATlNG DEVICE FOR FURNACES,

APPLICATION FILED DEC. 8, I914.

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4 SHEETSSHEET 2.

Patented 00t.26,1915.

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A IR SUPERHEATING DEVICE FOR FURNACES. APPLICATION FILED mac. 8, 1914.

Patented Oct. 26, 1915.

4 SHEETSSHEET 3.

Minin -n n, 5 n O Wm. emeo G w. E. SHORE.

AIR SUPERHEATING DEVICE FOR FURNACES.

Patented Oct. 26, 1915.

4 SHEETSSHEET 4- APPLICATION FILED DEC.3,1914.

' I 9/ M 1 J I 1/ AK til lll NE A' WILLIAM E. SHORE, OF NEW YORK, N. Y., AS SIGNOR T0 COMBUSTO DEVICES CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

AIB-SUPERHEATING DEVICE FOR FURNACES.

Specification of Letters Patent.

Patented Oct. 26, 1915.

Application filed December 8, 1914. Serial No. 876,165.

To all whom it may concern:

Be it known that I, WILLIAM E. SHORE, a subject of the King of Great Britain, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Air-Superheating Devices for Furnaces, of which the following is a specification.

This invention relates to improvements 1n air superheating devices for furnaces.

The primary object of the invention s to provide a device that will embody a construction wherein the various metal surfaces over which the air passes, in passing through the device, will be integral, thus greatly increasing the conductivity of the heat absorbed by the device from the products of combustion in the furnace.

A further object of the invention is to provide a construction whereby the air, passing into the device, will be thoroughly heated to an exceedingly high degree of heat before being. delivered to the fire pot.

A still further object is to provide a construction which can be made alternate in character, that is to say, the parts so cast that, in cases where a superheater of large dimensions is required, it can be readily associated or assembled with regard to its lateral halves or portions, toaccomplish this purpose.

A further object is to provlde a novel means for controlling the inflow of air to the superheater, from a preheatlng chamber formed in the front of the superheater. In some of my co-pending applications of which Serial Number 864,606, filed Oct. 2, 1914 is an instance, the air to be superheated is admitted through the lower portion of the device, after passing through a preheatlng chamber, whereas, in the present construction, the air is admitted through openings at the sides extending virtually from the top to the bottom of the casing.

1n the drawings illustrating the inventionFigure 1 is a perspective view of the superheater. Fig. 2 is a transverse horizontal section taken just above the center, and showing the air passages or conduits, and the central vertical air chambers between the horizontal partitions. Fig. 3 is a side elevation of one of the lateral halves of the casing. Fig. 4 is a front view of the casing, modified in the particular that rows of perforations are provided, instead of the vertical slots, as shown in Fig. 1. Fig. 5 is a rear view of the casing; Fig. 6 is a vertical section of one of the lateral halves on line 66 of Fig. 7 Fig. 7 is a horizontal section of a slightly modified form of one half of the casing; and Fig. 8 is a horizontal section of a device showing associated, two lateral halves of the casing of slightly different formation.

Referring to the drawings, the numeral 1 designates the casing made of cast metal, preferably cast in two lateral halves, brazed together at a central point, 2, as clearly shown in Fig. 2, the halves being made to match exactly, so that when they are brought together they will form a definite system of horizontal and vertical conduits or passages. The casing is provided with a rectangular flange 3 provided with a number of recesses 41 in the sides and bottom and top, for the reception of suitable packing material such as asbestos, so that when the casing is fitted against the furnace door, to which, as usual, it is especially adapted for attachment, the fit will be perfectly tight, and prevent the entrance of air around the edges or other crevices not intended for its admission. The flange is further provided with a number of bolt holes 5, for the reception of bolts which may be seated in the holes and provided with threads extending through the metal of the door to be secured by nuts on the outside or for the reception of rods, which become substantially an integral part of the casing, the rods being provided with threads on their outer ends, for the reception of nuts.

The rear of the casing is provided with a wall or plate 6 extending from the top 7 of the casing to the bottom 8. This wall 6 stops short of the side walls 9 and 10 of the casing, thus providing two vertical air inlet openings 11 and 12, which are normally partially covered by two laterally movable damper plates 13, and 14, each provided with a cam slot 15 for the reception of short studs 'the inner edges of the damper plates, while the other slots are oppositely located about centrally of said plates, as best shown in Fig. 5.

The numeral 22 designates a series of ver-.'

tical partitions extending from the top to the bottom of the casing. Partitions, as shown clearly in Fig. 2, extend from the sides of the casing and stop short of the center thereof. The numeral 23 designates two other partitions which extend from the top to the bottom of the casing, and to the center thereof, as indicated at 24.

The numeral 25 designates a series of horizontal partitions, integral with the vertical partitions, thus dividing the whole casing into a series of horizontal passages or conduits 26. The front of the casing is provided with a series of horizontal webs 27, the spaces between the webs communicating with the outside of the casing, through vertical side openings 28, .and through slots 29 in the casing, in the form shown in Fig. 1, and through perforations 30 in the slightly modified form shown in Fig. 4, so that the air admitted to the casing will, after passing through the various conduits or. passages and chambers within the casing, pass out through the openings I 28 and 29, where it mingles with the prodnets of combustion in the furnace.

The numerals 31, 32 and 33 designate three central chambers which extend from the bottom to the top of the casing, thus communicating with the various horizontal passages 26. The partitions 23 stop short of th side walls 9 and 10 of the casing, thus providing side passages 34 for the passage of superheated air around the ends of said partitions, so that the air, passing into the side openings 12, can circulate freely in a lateral direction through the passages 26, from one side of the casing to the other, while in communication with the vertical chambers 31, 32 and 33. The ends of the partitions 22 are spaced apart, thus permitting the air, coming through the passages 26 and upward through the chamber 33, to pass between the webs 27 and from thence through the openings 28 and 29 into the furnace.

Referring particularly to Figs. 6, 7 and 8, the numeral 35 designates a slightly modified form of half the casing and it will be noted that this portion is considerably wider than the half with which it is as sociated as shown in Fig. 8, which arrangement' is employed when it is desired to increase the width of the superheater, thecorresponding in all respects to the vertical wall 6. The numerals 37 and 38 designate two vertical partitions that extend inwardly from the side of the casing, and from the top to the bottom thereof. Between these partitions are a series of other partitions 39, 40, 41 and 42, the partitions 40 extending slightly beyond the center of the casing and off set as indicated at 43. The numeral 44 designates a series of horizontal partitions, which extend between the wall 36 and the partitions 37, 38, and the intervening partitions 39, 40, 41 and 42. The numeral 44 designates a vertical plate which in this form is employed on the modified part of the device, and extends from the top to the bottom of the casing, with its forward end against the vertical flange 45 of the off set portion 43 of the vertical partition 40. The horizontal partitions 44 are cut away at intervals, as indicated at 46, 47 and 48, thus producing, with the extended end 43 of the vertical chambers 49, 50 and 51, the vertical chamber 51 communicating through passage 52 with the half chamber 33 of theother side of the casing, thus forming an irregular vertical chamber near the front of the device, in communication with the front outlet openings 53, and side outlet 54, through the spaces between the webs 27 on the shorter part of the casing, and similar webs 55 on the modified side of the casing, so that in operation, in this form, the air passes up centrally through five vertical chambers instead of three in the form shown in the main figures.

As shown the partitions 39,. 40, 41 and 42 all stop short of the sides of the casing, thus leaving passages around their outer ends for the passage of the air between the horizontal and vertical partitions, and with the partitions 37 and 39, stop short of the plate 44, so as to form passages between the inner ends of said partitions and said plate, for the mixture of the laterally moving air with the vertically moving air coming up through the vertical chambers.

In Fig. 2 there is shown in dotted lines and indicated by 56, a portion of the furnace door and it will be noted that when the casing is in place against the door, a. preheating chamber 57 is formed between the plate 6 and said door, the door being provided with suitable vents or openings to admit air to the preheating chamber so that the air in passing into the preheating chamber and before beginning to circulate bepartitions, is preheated tween the various to a certain degree.

In operation, it being understood that th I device extends considerably out over the fire bed, where it becomes intensely heated by the products of combustion from the furnace the air passes/into the inlet openings 11 and 12,. and thrbugh thehorizontal passages between the various partitions, and is brought together at the center of the su ertop to the bottom of the casing, said casing belng provided with vertical and horizontal partitions forming a series of intercommunicatin horizontal chambers, and a central cham er extending substantially from the top to the bottom of the casing, and communicating with the spaces between the horizontal and vertical partitions, whereby the air is conducted to the center of the easing and mixed, the casing being also provided with suitable outlet openings communicating with the central chamber and with the horizontal chambers, between the partitions.

2. A superheater comprising a cas ng having inlet openings at opposite sides, and a plurality of vertical and horizontal part1- tions, with spaces between them, in intercommunication, and a series of vertical chambers extending substantially from the bottom to the top of the casing and communicating with the spaces between the partitions, wherein the laterally moving air is mixed and conducted forwardly, said casing being also provided with suitable outlet openmgs in communication with said chambers and spaces between the partitions, whereby the superheated air is conducted into the furnace.

3. In an air superheater, the combination with the furnace door, of a casing provided with a frontplate extending from the top to the bottom of said casing, anda flange adapted to abut against said door, there being a space between said door and said plate, thus forming a preheating chamber, inlet openings in oppositesides of said plate, and extending substantially from the top to the bottom of the casing, horizontal and vertical partitions within said casing and spaced apart from each other, extending from the top to the bottom thereof, a central chamber communicating with the spaces between said partitions, wherein the opposite streams of air are mixed, the casing being provided with suitable outlet openings communicating with said chamber, and spaces between the partitions whereby the air is conducted laterally through the casing, and ultimately discharged into the products of combustion of the furnace.

4s. A superheater comprising a metallic casing having air inlet openings in the front and at opposite sides and extending substantially from the top to the bottom of the casing, a plurality of horizontal and vertical partitions with intercommunicating spaces, which also communicate with the air inlet openings and a plurality of central chambers extending from the top to the bottom of the casing, the casing being provided with suitable outlet openings communicating with the spaces between the partitions, and a damper within the casing, adapted to control the admission of air to the inlet openingsQ '5. A superheater comprising a casing formed with a front plate having air inlet openings therein, and a plurality of intercommunicating heating chambers within the casing in communication with the inlet openings, and having an outlet end provided with outlet openings, there being adjacent to the outlet openings, a series of horizontal webs spaced apart from each other, the spaces between said webs being in communication with the chambers within the casing and with the outlet openings.

6. A superheater comprising a casing having a front plate provided with inlet openings and a discharge end provided with elongated vertical slots, a plurality of horizontal webs adjacent to said discharge end, the spacesbetween the webs being in communication with the vertical discharge slots,

and a plurality of heating chambers interposed between the front plate and the dis- .charge end, said chambers being in communication with spaces between the webs.

7. A superheater comprising a casing formed with inlet openings at its opposite sides and extending substantially from the top to the bottom of the-casing, said casing being provided with vertical and horizontal partitions forming a series of intercommunlcatmg horizontal chambers, the spaces between the vertical partitions, increasing from the front to the rear of the casing, whereby the capacity of said horizontal chambers is progressively increased from the bottom to the top, and, a central chamber extending substantially from the top to the bottom of the casing, and communicating with the spaces between the horizontal and & 1,157,965

vertical partitions, whereby the air is 0011- In testimony whereof I afiix my signature ducted to the center of the casing and mixed, in presence of two witnesses. the casing being also provided with suitable WILLIAM E. SHORE. outlet openings communicating with the Witnesses:

5 central chamber and with the horizontal TITIAN W. JoHNsoN, chambers between the partitions. JOHN HAZEN.

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