US1101723A - Air-register for apparatus burning atomized fuel. - Google Patents

Description

G. F. BAILEY & J. MORTIMER. AIR REGISTER FOR APPARATUS BURNING ATOMIZED FUEL.

' APPLICATION FILED MAY 22,1912.

1-Mmu1 A m mm 6 .M w? f m W D. a w m A w W F A2 A WWW v I w 0. F. BAILEY & J. MORTIMER. AIR REGISTER FOR APPARATUS BURNING ATOMIZED FUEL.

' APPLIOATION FILED MAY 22,1912.

Patented June 30,1914.

2 SHEET8-BHBET 2.

CHARLES F. BAILEY, OF HAIVETON, AND! JOSEPH MORTIMER, QF NEWPORT NEWS,

'VIRGINIA.

AIR-REGISTER FOR APPARATUS BURNING- ATOMIZED FUEL.

Specification of Letters Eatent.

Patented June 30, rear.

Application flledl May 22, 1912. Serial No. 699,061.

To all whom it may concern:

Be it known that we, 1) CHARLES Fr. BAILEY and (2-) Josnrn MORTIMER, citizens of the United States, residing at (1) Hampton and (2') N ewport News, in the counties of 1) Elizabeth City and (2) Warwick,; State of Virginia, have invented certain new; and useful Improvements in Air-Registers; for Apparatus Burning Atomized Fuel,- of Which the following is a specification.

This invention relates to improvements in air registers for use in conjunction with any suitable atomizers or burners for liquid or pulverized fuel.

The object of the invention is to provide an air register of simple form and construetion and of durable design, which may be used with any type of sprayer or burner, but preferably with burners which spray a fluid fuel under pressure, commonly known as mechanical atomiz'ing burners, and in any form of furnace, whether operating under natural, forced or induced draft conditions.

A large number of ways have been here-. tofore devised for supplying the air for. combustion to the atomized 0r pulverized fuel as it issues from the sprayer; and it has been found by experience that the economy of operation depends largely upon the meansv employed for supplying this air such means influencing and largely controlling the in-' tensity, position and shape of the flame.

We have demonstrated by carefully-controlled experiments that theefficiency of a. boiler using liquid fuel, in other words the; number of pounds of Water evaporated fromv and at 212 F., per pound of fuel, may be varied from ten per cent. to forty per cent. with air registers which, judged solely from appearances, are operating satisfactorily. In order to obtain the best evaporative results it is of course necessary that the percentage of oxygen in the stack gases should be kept as low as possible; and this requires that only sufiicient ir to cause complete combustion of the fuel should be supplied. If air in excess of that required for combustion is supplied, such excess air is heated resulting in a direct waste of heat; and moreover the gases flow over the heatingv surfaces with an increased velocity due totheir increased volume, which likewise tends to lower the eificiency. It is essential, in

order that combustion may be efl'ected with a mmimumproportion of air, that this air should be properly introduced into and mixed with the atomized fuel.

For the full understanding of the present invention, reference is made to the accompanymg drawings, illustrating a preferred embodiment thereof.

In said drawings Figure 1 is an end elevation of a preferred form of alr register, viewed from the rear or discharge end, the inner cone being partly broken away. Fig. 2 is a central longitudinal section of the same on line H-H of Fig. 1; Fig. 3 is an elevation of the said register, viewed from the front, the outer plate being removed, and parts hein broken away; Fig. 4 represents a modi ed form of the truncated inher cone; Fig. 5 represents a further modified form thereof; Fig. 6 is a diagrammatic section of one type of furnace fitted with the novel alr register operating under forced or induced draft conditions; and Fig. 7 is an elevation, partly in section, of a furnace fitted with the air register operating under natural draft conditions.

In said drawings, 1 represents a cage'or casing, consistingessentially of a concentric series of spaced, inwardly-projecting vanes 2. 'llhese vanes preferably present surfaces inclined to the radial planes of the cage, that is, to planes passing through the longitudinal axis, and are united at their inner and outer ends by rings 3, 4, which may b cast integral with the vanes. In the form illustrated, the cage 1 is frusto-conical, flaring outwardly from the burner-seat. A. sleeve 5, provided with apertures or ports 6, surrounds the cage 1 and is movable thereon by means of a rearwardly-projecting handle 7, this sleeve serving as a damper to regulate the admission of air between the vanes2. The cage is partially closed at its front or smaller en by a fixed plate 8, which may be integral with the vanes 2, said plate 8 having a central aperture 9 for the reception of the burner, and having also an annular series of apertures 10 for the admission of air directly to the inner cone. A disk-damper 11, similarly apertured, overliesthe plate '8, and may be rotated by means of its handle 12, in order to control the air-supplyto said cone. A ring 32, overlying the frogt plate 8 serves to retain the sleeve 5 and he damper 11, while ermitting movement thereof.

Within the cage 1 is a fixed inner or burner casing 13, in the form of a relatively boiler front when the register is in operative position, is secured to the cage 1 in properly spaced relation by bolts 17: this plate 16 has a central burner aperture 18 registering with the aperture 9 of the front plate 8 and is preferably slotted as indicated at 19, 20, to receive the handles 7 and 12 and to permit movement thereof to such extent as may 'be necessary for the regulation of the ports in the cage and front plate re ectively.

' rtain preferred modes of mounting the register in connection with boiler furnaces are illustrated in Figs. 6 and 7, wherein 21 represents a burner of any approved type, 22 the boiler, and 23 the boiler-furnace. The register is mounted in conjunction with the refractory furnace wall 24, and is inelosed by a sheet-metal casin 25, which may either receive the air an er pressure or induced draft through the flue 26, as shown in Fig. 6 or through other flues not shown, or which may be apertured as indicated at 27, in Fig. 7, for use with natural draft conditions.

28 represents a door, mounted upon the furnace front, for closing a lower opening when desired.

The urpose and result of the arrangement 0 parts as above described is to secure an extremely intimate intermixture of the air and fuel with the result that combustion of the atomized fuel may be secured with the minimum proportion of air, the

quantity of air admitted through the periphery of the register and likewise through the front plate thereof bein subject to accurate control. The air is a mitted through the peripheral orts 6 directly tothe channels between t e vanes 2, and when these vanes are inclined to the radial planes of the register, as in the preferred construe-- tion, there is imparted to the air so admitted aninwardly directed whirling movement which persists to a greater or less degree in the flame itself, as indlcated at 29 in Figs. 6 and 7. This whirling motion imparted to the flame does away with any 'core in the flame that might otherwise form,

and keeps the flame in contact with the furnace walls, not only on the upper half, but entirely around the periphery, thus giving moreeflective furnace-heating surface, and a A plat correspondingly higher furnace eificiency. The cage 1, and the inner casing 13, are usually frusto-conical in form as shown, but for certain purposes and applications either or both of these elements may be cylindrical; and under certain conditions, also, the vanes '2 may be disposed in radial planes. The

inner casing 13 is essentially a protecting member such as a cone or cylinder, and keeps the heavy blast of air from beating down the minutely atomized fuel until combustion has started and a high temperature has been reached. This protecting member has the effect of producing combustion near the front of the furnace, thus increasing the effective heating surface of the furnace.

In certain instances it has been found desirable to alter the form of the flame issuing from the register by providing for the admission of air to the inner casing 13 through its periphery, such admission of air being supplemental to the introduction of air intothe front of the inner casing through the regulated ports 10. For this purpose, we may provide in this casing one or more series of peripheral holes 30, as shown in Fig. 4:; or an annular slot 31 between spaced,

overlapping sections of the casing wall, as

shown in Fig. 5. One or another of the described modifications may be used, as may be desirable under all conditions of the installation; or the device may be otherwise modified as desired without departure from the spirit of the invention.

We claim '1. In an air register for fuel burners, a cage having peripheral ports and tangential inwardly-projecting vanes, said ports located between and substantially coextensive in length with said vanes, means having longitudinal slots controlling said ports, and an inner burner-casing having walls shorter than and adjacent the inner edges of said vanes.

2. In an air register for fuel burners, a cage having peripheral ports and inwardlyprojecting vanes, said ports located between and substantially coextensive in length with said vanes, said vanes disposed at an angle to the longitudinal radial lanes of the cage whereby an inwardly directed whirling movement is imparted to the inflowing air,

rotary peripheral means having longitudiof said vanes and having rear ports, and

means for controlling said rear ports.

4:. In an air register for fuel burners, a cage having peripheral ports and tangential inwardly-projecting vanes, said ports located between and substantially coextensive in length with said vanes, rotary peripheral means having longitudinal slots for controlling said ports, an inner burner-casing having walls shorter than the inner edges of said vanes and having peripheral and rear ports, and means for controlling said rear ports.

5. In an air register for fuel burners, a cage having peripheral ports and inwardly projecting vanes, said ports located between and substantially coextensive in length with said vanes, said vanes disposed at an angle to the longitudinal radial planes of the cage whereby an inwardly directed whirling movement is imparted to the inflowin air, rotary peripheral means having longitudinal slots for controlling said ports, an inner burner-casing having walls shorter than the inner edges of said vanes and having rear ports, and means for controlling said rear ports.

6. In an air register for fuel burners, a cage having peripheral ports and inwardly projecting vanes, said ports located between and substantially coextensive in length with said vanes, said vanes disposed at an angle to the longitudinal radial planes of the cage whereby an inwardly directed whirling movement is imparted to the inflowing air, rotary peripheral means having longltudinal slots for controlling said ports, an inner burner-casing having walls shorter than the inner edges of said vanes and having peripheral and rear ports, and means for controlling said rear ports.

In testimony whereof, we ailix our signatures in presence of two witnesses.

CHARLES F. BAILEY. JOSEPH MORTIMER. Witnesses:

MoG. SIN'roN, GEO. A. PARKER.

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