US1270680A - Furnace. - Google Patents

Description

@- ZULVER.

FURNACE.

' APPLICATION HLED1UNE25. I9l]. 11,270,680. Patented June 25, 1918.

2 SHEETS-SHEET I.

I I l l I I I l I x I u I C. ZULVER.

FURNACE.

APPLICATION FILED JUNE 25. l9l7- 1,270,680. Patented June 25, 1918.

2 SHEETS-SHEET 2.

UNITED STATES PATENT orrron CORNELIS ZULVER, OF LONDON, ENGLAND, ASSIGNOR OF ONE-HALF TO LAUNGELOT EUSTACE SMITH, SOUTH SHIELDS, ENGLAND.

FURNACE.

Specification of Letters Yatent.

Patented June 25, 1918.

To all whom it may concern:

Be it known that I, CoRNELIs ZULvnR, a subject of the Queen of the Netherlands, residing at St. Helens Court, Great St. Helens, in the city of London, England, have invented a new and useful Improvement in and Relating to Furnaces, of which the following is a specification.

This invention relates to furnaces burning either liquid or solid fuel as desired, and consists in an improved construction of furnace front designed for liquid fuel burning, which front takes the place of the ordinary fire door used for coal burning. With the improved furnace front more efiicient combustion is obtained when burning liquid fuel, and it is designed particularly with a view to utilizing the same front for either liquid or solid fuel combustion in a marine or other type of steam boiler, while quick changing over or conversion to either fuel can be effected without expense or loss of time.

A furnace front according to this invention is illustrated in the accompanying drawings, in which Figure 1 is a view in longitudinal section of a boiler furnace provided with the improved furnace front for li uid fuel, and

Fig. 2 is a front view of the urnace front.

Figs. 3 and 4 are respectively a front view and a vertical section of the usual fire door which replaces the furnace front when burning solid fuel.

According to this invention the furnace front comprises an oblong, square, boxform, or other suitably shaped attachment, which is bolted to the furnace front plate 2 and is closed at the front by a sliding plate 3 capable of being moved along supports 4 to adjust auxiliary air admission to the fuel burner or burners 5. The attachment 1, is, for example, in the form of a cylinder. The burner or burners is or are mounted upon a box 6 furnished with distributing valves 7 for regulating the fuel sup ly.

T e burner box 6 is attached to a cast-iron dome piece or battle 8 within the aforesaid cylinder 1 and said battle is formed with suitably shaped air openings 9. The size or shape of the air openings and the form of the dome may be varied as found most effective.

The lower half or ashpit 10 of the furnace is closed by a portable plate 11 in which one, two or more tubes 12 are fitted extending into the ash-pit. Through these tubes, of which the length may be varied, the principal amount of air is introduced to the furnace for combustion. The amount of air is regulated through the tubes by means of sliding doors 13. The air travels through the tubes and returns to the front of the furnace where it impinges upon the firebars 14 and becomes heated before mixing with the burner-spray. The heated air onters the furnace through a square or oblong opening 15 formed in the dead plate 16, and then meets the fuel spray at right angles, or nearly so, whereby a thorough admixture of air and fuel is obtained. The sole object of the air-tubes 12 is to provide a convenient method of heating the air supporting combustion before mixing with the fuel spray, hot air being an essential condition to obtain complete and smokeless combustion of liquid fuel, the air also keeping the firebars cool.

The fire-bars are covered with one or two layers of fire-resisting material or ordinary fire bricks 17.

Heated oil under pressure is forced through the burners and the air-supply is adjusted by means of the dampers until smokeless combustion and bright flame is obtained.

To adapt the furnace to coal burning all that is necessary is to remove the brick covering 17 and to replace the cylindrical furnace-front 1 by the ordinary furnace door 18, as shown in Figs. 3 and 4, and to remove the plate 11 with the tubes 12 closing the lower half of the furnace. The openings in the dead plate are closed by means of plates 19 which are loosely fitted in, This change can be made quickly and Without loss of time to the steamer, either When bunkering or at sea. What I claim as my invention and desire to secure by Letters Patent, is

V In a furnacathe' combination with a furnace front having a fuel supply opening, a bafile formed'ewith air inlet openings, With 7 scribed;

means to inclose said baflie, of a plate closing the ashpit of the furnace, and air supply tubes attached to said plate andextending; into the, ashpit, substantially as .de-

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ww le 7' Copies of this patent may be obtained for five cents each; by a-d'r lressin'g the flommissioner ct Patents,

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