US1161133A - Furnace. - Google Patents

Description

D. S. JACOBUS.

FURNACE.

APPLICATION FILED DEC. 10, 1913.

Patented Nov. 23, 1915.

4 LI MR F. m h u m w v u m Nu Q n W Mx. m H W H Im m w W m 1% I r r p WITNESSES:

DAVE S. JACOBUS, 0F JERSEY CITY, NEW JERSEY, ASSIGNOJB; T0 BABCOCR &

COX COMP, OF BAYONNE, NEW JERSEY, A CORPOTION OF w l H JERSEY.

FNACJE.

Specification of Letters Patent.

Patented Nor. 23, tmld.

- Application filed December 10, 1913. Serial No. 805,701.

To all whom it may concern:

Be it known that 1, DAVID S'. JAcoBUs, a citizen of the United States, residing at Jersey City, inthe county of Hudson and State of New Jersey, have invented certain new and useful Improvements in- Furnaces, of which the following is a-specification.

My invention relates to a furnace construction, the object being to-provide means for admitting air to the gases after they leave the furnace, and above the entire volume of the gases andbelow a bafile forming the roof of the furnace, in order to increase the efliciency of combustion and to minimize smoke.

Other objectsare to admit the air in regulated amounts, and'to edect a thorough mingling of theair and hot gases by the introduction of a system of brick work near the rear of the furnace roof.

These and other objects of the invention will be understood by reference to the accoinpanying drawings in which--v Figure 1 is a longitudinal section of a furmace and boiler for the purpose of illustratingone embodiment and application of the invention; Fig. 2 a top view, partly in sec.- tion, of the furnace Fig. 3 a transverse section through the air inlet to the furnace; and Fig. 4 a topview, enlarged, of the air regulating damper.

Similar reference numerals indicate similar parts in the several views.

For the purpose of explaining one application of my invention have shown my improved furnace .in connection with a boiler of standard design comprising a bank 1 of inclined generating tubes expanded into front and rear headers 2 and 3, connected by suitable pipes and circulators to a transverse steam'and water drum 4.

The furnaceis constructed with a longitudinal arch 5 extending from the front wall to a point substantially below the uptake headers 2, and a bridgewall; 6 at the rear ofthegrate. Above the inner end of arch 5, and between it and the headers 2,

is a transverse arch 7 supported suficiently far above the arch 5 as to provide an opening 8 for the admission of air toLtlie see ondary combustion chamber 9, the opening,

into which chamber is through the contracted passage between arch 5 and bridge wall The roof of chamber 9consists of.

a longitudinal baffle 10 supported on the lower row oftubes of bank 1 either encircling the tubes, as shown, or leaving the lower part of the tubes bare, and extending from arch 7 and headers 2 to or beyond the arch 11 to direct the hot gases to the downtake end of the-generating tubes. In the preferred arrangement brick work piers, or other suitable arrangement of brick work, will be used for mingling the air and hot gases. In the construction shown employ a transverse arch 11' supported below the longitudinal bame 10 and forming the rear wall of chamber 9Q The air and gases are deflected downwardly from the roof 10 and arch 11 and pass beneath arch 11 into a chamber 12 below the downtake end of the tubes. A longitudinal bafie 13 resting upon one of the intermediate horizontal rows of tubes and extending from the downtake headers 3; a transverse baf-' fie 14; and a wall or bame 15 direct the gases forwardly among the lower tubes of the bank, across the uptake end, and thenalong the tubes above baffle 13 to the stack outlet 16. The'air which is admitted to the secondary combustion chamber 9 through opening 8 enters the space between the outer metal plate 17 and arch 5 through openings 18 in said plate, and to regulate the amount of entering air I provide a damper 19 having openings corresponding to openings 18, and adapted to be moved between suitable guides 20 to close the openings 18 more or less as may be desired.

From. the foregoing description it will be seen that the air is admitted immediately below the inclined roof 10 in a sheet above the entire volume of the hot gases after they leave" the furnace chamber 21, and hence does not reduce the furnace temperature. When air is admitted directly into a furnace chamber its action, in minimizing smoke, is handicapped somewhat through the cooling action of the air on the furnace walls. By the present arrangement, however, the full furnace temperature is maintained and practically complete combustion effected by the arrangement of the secondary combustion chamber where the tendency of the air is to fallthrough the hot gases, and thereby produce an eddy action, and where the air and gases in passing beneath the arch 11 are further mixed all of which results in a most complete secondary combustion, and the minimizing of smoke.

The roof 10 of the secondary combustion chamber 9 is inclined downwardly from the front of said chamber to the cross arch 11, and in practice said roof and arch become incandescent. Introducing the air in the manner described, that is, in a sheet above the entire volume of the gases and below an arch or incandescent baflle, not only efi'ects practically complete combustion, but has a beneficial effect in slightly cooling arch 11, thus prolonging its life.

What I claim and desire to secure by Letters Patent of the United States is 2-.

' 1; A horizontal water tube boiler having a front external furnace and a primary combustion chamber, a horizontally extending baflie in the rear of the primary combustion chamber extending along the tubes to form a secondary combustion chamber below the tubes, an exit from the rear of the secondary combustion chamber leading to the tubes, bafliing arranged along the tubes for directing the gasesthereover, and means for admitting air above the level of the primary combustion chamber to the secondary coanbustion chamber.

2.-A horizontal water tube boiler having a front external furnace and a primary combustlon chamber,

a. horizontally extending baflle in the rear of the primary combustion chamber extending along the tubes to form a secondary combustion chamber below the tubes, an exit from the rear ofthe secondary combustion chamber leading to thetubes, baiflin arranged along the tubes for directing the gases thereover,means for admitting air above the level of the primary combustion chamber to the secondary combustion chamber, and means for regulating the volume of the entering air.

3. A horizontal water tube boiler having a front external furnace and a primary combustion chamber, a horizontally extending bafiie in the rear of the primary combustion chamber extending along the tubes to form a secondary combustion chamber belo v the tubes, an exit from the rear of the secondary combustion chamber leading to the tubes, a transverse arch below the rear portion of the horizontal battle for deflecting the gases downward, battling arranged along the tubes for directing the gases thereover, and means for admitting air above the level of the primary combustion chamber to the secondary combustion chamber.

4. A horizontal water tube boiler having a front external furnace and a primary combustion chamber, a horizontally extending bafiie in the rear of the primary combustion chamber extending along the tubes to form a secondary combustion chamber below the tubes, an exit from the rear of the secondary combustion chamber leading to the tubes, a transverse arch below the rear portion of the horizontal bafile for deflecting the gases downward, baffling arranged along the tubes for directing the gases thereover, means for admitting air above the level of the primary combustion chamber to the secondary combustion chamber, and means for regulating the volume of the entering air.

In testimony whereof I have hereunto signed my name in the presence of two subscribing witnesses.

DAVID S. JACOBUS.

Witnesses:

EUGENE P. TERRY, EDITH CAMP.

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