US1536147A - Complete-combustion apparatus for marine boilers - Google Patents

Description

.May 5, 1925 T. SAT 4 COMPLETE COMBUSTION APPARATUS FOR MARINE BOILERS Filed Jan. 6, 1922 Patented May 5, i925. y

` Niirursn srAriss essere COMPLETE-COM'BUSTION APPARATUS MARINE BOILERS.

Application led January 6, 1922. Serial No. 527,512.

To all whom it `11mg/ conce/1%.'

Bc it known that l, '.lfonUsAeUno Saro, a subject of the Emperor of Japan, and a resident of No. 1061 Tamade-Machi, Nishinari-Grun, Osaka, lihnpire of Japan, have inventednew and useful Improvements in Complete-Combustion Apparatus for l/larine Boilers, of which the following is a specification.

This invention relates to combustion apparatus for marine boiler in which a refractory wall is secured on a nre bridge in inti mate relation with the flue plate and is provided with an air duct in the mass of said wall which duet is opened to an internal flame passage of the wall at each side for discharging the. hot air, preferably, intensivcly heated air therefrom, sucked in from the underside of the vlire bridge, said wall also being extended to form a conical shaped flame guidel having a sharp edge at rear end thereof.

This invention has for its purpose to provide a means `to make economically complete combustion of fuel in a simple and efficient manner.

My invention will be readily understood by reference to accompanying drawing, in which:

Fig. l. is a longitudinal vertical sectional view of a marine boiler provided with my invention,

Figfi is a cross sectional view of Fig. l,

Fig. 3 is an enlarged longitudinal sectional detail view of my invention, and

Fig. ll: is a cross section thereof, halfly being omitted.

Referring to the drawing, (l) is a marine boiler proper, (2) represents the smoke tubes and (Il) is a lire bridge on which the rear end of the tire grate ($5) is supported.

ln the flue and on the lire bridge,` a refractory wall secured in intimate relation therewith, which has a flue opening, the rear end of which is contracted to form a flame guide (G) around the circumference of which is a sharp edge as shown. (7) is lire bridge supporting frame. ln the lower side of said lire bridge is a vent hole (8) in which the air is sucked from the ash pit below the grate and is conducted to air ducts (0) provided in the mass of the refractory wall itself. The duct 9 is also opened to the internal flame passage or flue opening of the wall at the ends as at" .combustion without smoke.` `In the fame (7), an air regulating box or damper (ll) which is open at the top is slidably mounted for regulating the quantity of air passing through the box by any appropriate means, say, by a handle (l2) attached to said box.

In this invention, the refractory wall is heated by flame gas from the fire box while the air sucked in from the underside of the fire bridge through the vent hole (8) and the air regulating means (11)- becomes brightly heated during its passage through the ducts 9 of said heated wall and is discharged through the jet hole (l0) at each side, into the flue opening or flame guide 6. Then, the flame gas is prevented Vfrom cooling down up to the ignition temperature of the carbon monoxide. rl`he flame is also prevented from directly rising up from the passage to the smoke tube (2) by means of the flame guide (6), thus making a mixture of the incompletely burned gas and oxygen and providing a greatly promoted combustion. The flame guide (6) is extended, as shown, to form sharp edge which, being extensively heated, serves to highly heat the mixture with the carbon monoxide and oxygen.

My invention is provided to regulate the quantity of the heated air by adjusting the regulating box.

Having now described and ascertained the nature of this invention and in what manner the same is to be performed, I vdeclare that what I claim is uIn a furnace, a [ire box, an ash pit, a bridge wall in rear of theash pit and lire box and having an opening extending rearv wardl y from the fire box, and a combustion chamber into which saidopening discharges, the said bridge wall having on its rear side a flange which depends therefrom and also presents afrusto-conical inner side forming a contraction of the rear end of said opening, the said bridge wall also having a hot air intake opening leading from the ash pit and a ductleading from said hot air intake opening formed in the mass of the bridge wall and discharging into one side 0f the first named opening therein and a frame supporting said bridge Wall and against the rear side of which the said depending ange of the re Wall bears, said frame and flange also having an opening to establish direct Communication between the ash pit and the Combustion chamber, and means to control the passage of air through said opening and

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