US1814164A - Gas burner structure - Google Patents

Description

G. H. IRWIN GAS BURNER\ STRUCTURE Filed Aug July 14, 1931.

ll, 1928 2 Sheets-Sheet l 'IIIIII'IIIIIIIIIIIIIII rlmvlll "IIIIIIII' IIIIII Immim; J M B 9 G. H. IRWIN GAS BURNER STRUCTURE 2 Sheets- Sh eet 2 Fild Aug.

Patented July 14, 1931 barren stares GEORGE I-LIRWIN, OF CHICAGO, ILLINOIS GAS BURNER STRUCTURE Application filed August 11, 1928. Serial No. 298,555.

My invention relates to improved burner structure adapted particularly for use with steam or hot water boilers for delivering complete combustion mixture of properly proportioned gas and air to a closed fire box Without further admixture of air, and improved application and arangement of an ignition element such as a spark plug for igniting the combustion mixture.

An important object is to provide a simple burner structure which Will receive the combustion mixture under pressure and speed and Will discharge it in a uniform stream into the furnace.

Another object is to provide a burner having an annular nozzle chamber With a circu lar concentric row of mixture outlets, together With a spark plug located axially Within the outer end of the space surrounded by the nozzle chamber so as to be away from the hot end of the nozzle and subjected to the cooling influence of the cool combustion mixture travelling through the chamber, whereby the plug Will at all times be protected from the heat.

Another object is to keep the spark plug out of the direct path of the combustion mixture and to provide for small pilot jets into the sparking field of the plug for igniting the main stream of mixture discharged from the nozzle chamber into the furnace.

Referring to the drawings Figure 1 shows part of a. boiler in diametral section and my improved burner applied thereto.

Figure 2 is a front elevation of the boiler and burner.

Figure 3 is an enlarged section on plane 33, Figure 2.

Figure 4 is an enlarged section on plane 4-4, Fig. 2, and

Figure 5 is an elevation of the outlet end of the burner.

The body or nozzle 1 of the burner structure is annular and encloses the annular chamber 2. A duct 3 connects with the outer end of the body to supply combustion mixture to the chamber 2 and the inner end Wall 4 of the body has the outlet holes 5 for di- 6O reeting the mixture into a fire box or other chamber 2' to be discharged through the space Where it is to be burned. Within the central or axial space 6 of the annular body I locate an ignition element such as a spark plug 7 for igniting the combustion mixture discharged through the holes 5. For sup- .55 porting the spark plug I provide a Web 8 at the outer end of the space 6, Which Web is axially threaded so that the plug can be readily screwed therein from the outside of. the burner; This arrangement will keep the plug sufficiently remote from the hot Wall 4 and Within the cooler zone of the burner so that the plug will be kept comparatively cool. To insure ignition of the mixture discharged through the holes 5, one or more small radial holes 9 may be provided for dir eting pilot jets toward the plug spark points. The flame from these jets Will be small and of comparatively little heat but will serve to. ignite the main body of the combustion mixture discharged through the holes 5.

'My improved burner can be used with great efficiency on steam or not Water boilers for generating steamer heating Water for industrial or domestic purposes, particularly Where complete combustion mixture of prep erly proportioned air and natural or manufactured gas is to be delivered to a closed fire box Without further admixture of air. 7

I have shown the burner applied to a steam boiler B Whose fire box 10 is entirely closed to combustion element inlets except for the inlet opening-11, into Which the burner nozzle of body extends, and this opening is sealed when the burner is applied. The burner has the flange 12 by means of Which it is secured to the reinforcing frame 13 applied to the boiler at the inlet 11, a gasket 14 being interposed between the flange and frame to make the connection gas and air tight. The frame 12 has theshelf 15 for supporting a motor M and fan F driven thereby. The fan receives and thoroughly mixes air and gas in proper proportion and the completed combustion mixture is delivered from the fan through the fitting 16 to the burner, inlet duct?) and from there to the burner holes 5 into the closed fire box for combustion therein.

The burner wall 4 becomes heated by the reflex actionof the heat in the firebox so that the combustion mixture directly adjacent to the wall is preheated before flowing through the holes 5 and becoming ignited and the combustion efiiciency is thus increased. However, the chamber zone surrounding the spark plug is kept comparatively Very cool by the cool-mixture:forced into and through the chamber by the fan pressure so that the spark plug cannot become overheated. Byplacing the plug at the outer end of the pocket of space 6, it is away from the direct action of the main flame and the heat in the furnace. Practical tests have demonstratedthat with the completed mixture of air and gas flowing under pressure and at a high rate of speed through the burner, and with a temperature of l800 to 2000" Fahrenheit iii the fire box, the spark plug can be kept at a temperature not in excess of 300. 'By placing .the spark plug well within the recess or passage 6, it will be out of the path of any dust, dirt or foreign matter which might beblown through the burner with the combustion mixture and which might foul the plug. 7

It is evident that a numberof burners may be applied to a furnace and the combustion mixture-"supplied from the same fan, and tlie spark plugs operated from the same ignition circuit.

The sparking is preferably continuous from the high voltage secondary of a transformer connected -directly with the ordinary 110 volt or 220 Volt house circuit.

I do notdesire to be limited to the exact structure and: operation shown as vmodifications are possible without departing. from 'the scope of the invention.

\ ranged in a row concentric with said body,

bustion mixture inlet for the outer end of said chamber, there being combustion mixture discharge outlets from the inner end of said chamber arranged in a row concentric with said chamber and said space, a wall enclosing the outer end of saidspace, and a spark plug extending through said wall to project into said space with its terminals entirely Within the plane of said discharge outlets. V In witness whereof, I have hereunto subscribed name this 9th day of August,

GEORGE H. IRWIN.

a spark plug located axially within-the outer end of the central space surrounded by said body, and radial gas outlets fromsa d annular passage for ldirectingp-ilot flames into said central space bet-weenthe sparking end of the plug and said main outlets. 2. A gas burner structure comprising. an annular body enclosing an :annular .pas-

sage, a combustion mixture inlet to said passage, combustion mixturei main outlets through the inner wall of said body arranged in a row aroundthe-bodyaxis, a wall across the touter end of the space surrounded by said annular-body, a spark plug seated in-isaidiwall and projecting axially

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