US1234173A

US1234173A - Heater for water-tube boilers.

Info

Publication number: US1234173A
Application number: US6085315A
Authority: US
Inventors: William Wallace Kemp; William H Van Horn
Original assignee: Individual
Current assignee: Individual
Priority date: 1915-11-11
Filing date: 1915-11-11
Publication date: 1917-07-24
Anticipated expiration: 1934-07-24

Description

W. W. KEMP @L W. H. VAN HORN.

ATER FOR WATER TUBE B0 ILERS.

APPLICATION FILED NOV. 11,1

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1934,63' W3. n APPucATloN FILED Nov, n, 1915. Patented July 24, 1917;

2 SHEETS-SHEET 2.

l fication.

WILLIAM WALLACEKEMP AND WILLIAM H. VAN HORN, OF BALTIMORE, MARYLAND.

HEATER FOR WATERJIUBE BOILERS.

Specification of Letters Patent. Patented Illy 24, 1917.

Application led November 11, 1915. Serial No. 60,853.

To all whom t may concern:

Be it known that we, WILLIAM W. KEMP and WILLIAM H. VAN HORN, citizens of the United Statesesiding at Baltimore, in the county of Baltimore City and` State of Maryland, have invented new and useful Improvements in Heaters for 1Water-Tube Boilers, of which the following is a speci- This invention relates to an improved water boiler and a heater or burner therefor.

i r1`he invention has among its objects to provide a water tubeboiler of such peculiar construction that an explosive mixture may bc confined in a small space therein and be thoroughly and completely consumed; to` i increase the general efficiency of the boiler; to provide a greater evaporative surface; to considerablyy reduce the formation of scale; to apply and confine the heat to the most advantageous point to prevent the loss of heat units; to effect the consumption of the fuel of the burner completely and without odor; to dispense with stacks and consequent loss of heat through them; to dispense with the furnace or fire box; to dispense with the opening through which atmospheric air is admitted to support combustion; and to provide a relatively small and compact structure.

It is a further object of the invention to provide my device with a burner which is detachable from the remainder of the apparatus in such manner that it may be easily removed when it is desired to renew the same, or when repair or cleaning thereof is necessary. Gras may be supplied to either end of the burner, so that in event of one of the valves being inadequate to supply sulicient fuel, the other valve may be operated, so that fuel is supplied by both of said valves.

It is a further object of the invention to provide a burner of such peculiar construction that it may be mounted in one of the water tubes of the boiler in such a manner that the water tube acts as a water jacket for the burner to not only protect the burner and its parts but to also provide for an increased evaporative surface heated by the reflected heat of combustion; wherein combustion may be forced to greatly increase the efliciency of the evaporative surface;

` and a burner by the use of which substantially perfect combustion of the fuel is had.

The above and other objects and advantages of this invention will be more clearly brought out in the following detail description of the present preferred embodiment of the invention, the same being shown in the accompanying drawings wherein;-

Figure l is a longitudinal vertical section taken centrally through the water tube boiler and the burner mounted therein.

Fig. 2 is a transverse section through the forward end of the water tube boiler taken on the line 2 2, Fig. 1.

Fig. 3 is a transverse section taken on line 3 3, Fig. 1.

Referring to they drawings which disclose one embodiment of our improved watertube boiler, 10 designates the body portion of the furnace on which is mounted a steam drum 11 having water legs or headers 12 and 13 which extend downwardly from the front and rear ends respectively of the steam drum 11. Within the body section 10, and extending between the legs or headers', are a plurality of the water tubes 14 and a burner 15 located centrally of the water tubes. About the sides ofthe body portion 10 and the steam drum 11 is a body wall or brick-work 16.

The body portion 10 of the furnace, which may be constructed of any suitable refractory substance, has a combustion chamber 16 extending longitudinally through the same, the chamber having in its walls semicylindrical pockets 17 and substantially at the longitudinal centers of these pockets are located the water tubes 14, an annular passage being provided thereby about the tubes for the products of combustion to insure the heating of the entire surface of the tubes.

The water tubes 111 extend between the headers 12 and 13 and communicate therewith, as shown in Fig. 1. Located centrally of the water tubes isthe burner 15 which comprises an inner or burner tube 18 having a plurality of burner tips 19 radiating from the sides thereof, and a water tube 20 arranged concentrically about the burner tube 18 and through which the burner tips 19 protrude, the space between the tubes 18 and 20 serving as a water jacket for the burner.

The burner 15 extends through central openings in the front and rear headers 12 and 1S. the headers being provided with sleeves 21 which lit about the burner, suf-k 'in event one of the pipes 22 is inadequate to supply sufficient fuel to the furnace, the valve in the other supply pipe may be operated to admit air and gas, and thus the supply of fuel may be substantially dou:

bled. The'watenspace between the burner tube 18 and the'water tube 20 is in communication with the headers at eitherl end of the furnace by means yof pipes or connec` tions 24: whichare located on the' outsideof the furnace, so that access thereto maybe readily: had. To start the furnace by igniting the Vgas as it issues from the burner, ports 25 are provided, which extend from the exterior of the furnace intothe combus-Y tion chamber in which the watertubes and burner are located, and these ports 25 are adapted tobe Yclosed by suitable plugs 2G.

The'burner'15 is so disposed withinthe body section of the furnace, that the burner tips 19 project the flame, f not"directly `against the water tubes 14%, but `against the walls of the semi-circulary pockets 17 and between these tubes. yThe water Vtubes 14Cy areheated bythe heat reliected from these walls, and, therefore, as 'direct heating of' y the tubes is partially eliminated, the liabilityof burning out the water tubes is materially decreased, while, at the same time, practically all of the heat units evolved by the combustion of the fuel are utilized in heating the water within the tubes.

As shown in the drawings, the combustion chamber 16', and the tubes 14 and burner 15 located therein are inclined upwardly and forwardly; the forward end of the body portion is cut-away as atr 27, so that a relatively sinall passage is provided, and the products of' combustion are caused to pass through this opening intoV the space provided 'around the steam drum 11.' By so inclining the water tubes and the combus tion chamber in the manner described, air pocketsv are avoided, and the accumulation of the products of combustion in the corners of the chamber is prevented. A better circulation of water within the tubes is provided, the path of circulation of the water being through thetubes 1i,`the headers y12 and 13 and the steam drum 11. Furthermore, the mud and other sediment `which* accumulates inthe steam drum and the watertubes, and which is contained inthe water passing through the boiler is caused to drop or collect in the rear leg 13. In the bottom of this leg or header is provided a blow-off valve 28.

By providing the burner with a water jacket inthe manner described, the water yin the steam drum 11 yand the water tubes 14 circulatesr continuously through the wa ter space between the tubes 18 and 2O and through the connections .124, -so 'that theburner tube 18is eifectually protectedlfromv thebranch connections 24 connect-ing the' burner to the headers are disconnected, and the burnermay be removed from the rfurnace by withdrawing the same through either of the sleeves'21.y Thus the' burner may be easily removedfor renewal, orwhen it is desired to clean or repairv the same.

With the equipment described, granular L refractory material is not required,in order toburn an Aexplosive mixture, and such mixtures can be burned throughout thelength of the confined chamberv withl complete com bustion, even distribution of heat andwith splendid temperature control. The water tubes :14 and the water Vspace about the burner 15 are confined within'af'relatively ysmall combustion chambervin which the ex! plosive mixture is lthorougl'ily and 'com-' pletely consumed and the heat units evolved in the combustion of the fuel are utilized in heating the wateiv'fithin the watertubes. The" burner is adapted to receiveatmosphei'i'c air through the connections described, and all other openings for theadmission of atmospheric air to'suppo'rt combustion `within the combustion *chamber isA =dispensed with; that is to say; the'explosive'mixture' is self-sustaining.

The `rsteam drum 11 is mounted "upon'tlie top-'of the body'portion 10 and issubsta-ntially inclosed by *a bric'kiwll 11G, the i brick wallvr being so constructed*asto-form'an annular or arcuate chamber 29about the 'steam drum, which annular chamber is in communication with the chamber 16 by means of ,the hereinbefore described passage 27. Ex-

tending fromv the front of the yfurnace, but

`terminating at a point shortr of the rearwall thereof and located substantially oir the vlevel with the water in the steam drum isa horizontal baffle 30 which causes the products of combustion issuing through the 'passage 27 to travel backward substantially throughout' the entire length of the steam drum 'and then forwardly beforepassin'g into the vat,

mosphere. The steam drum and thevannular passage thereabout are inclined upwardly and forwardly, so that air 'pockets inthe drum 11 are avoided, and the mud and other sediment which precipitates from the water admitted into the steam drum collects in the rear leg or header 13.

Arising from the top of the furnace is a brick dome 31 lined with a metal sleeve 32, and provided with a damper or cover 38. Within the dome is located a water-feed heater comprising a coil 34, to which coil is connected a pipe 35 leading from a suitable supply of water. Within the steam drum is located a mud drum 36 connected at one end to the coil 311 by means of a pipe 37. The mud drum is inclined as shown, and at the lower rear end of the same is provided a pipe with a blow-off valve 38 for withdrawing the mud from within the mud drum. The mud drum is in communication with the steam drum by means of an opening provided in the spout 39.

It will be noted that the heat evolved by the combustion of the fuel is utilized to heat successively the water tubes 14 and 20, steam drum 11, and the coil 34, so that the heat of the products of combustion isthoroughly exhausted, and the efficiency of the furnace is thereby greatly increased.

The steam drum 11 is provided at its forward end with a steam outlet 40, through which the steam generated in the water tubes and the steam drum passes to the usual steam pipes. Immediately below the steam outlet is provided a deflecting plate 41, and between the deflecting plate and the outlet opening 40 is a perforated pan a2, the defleeting plate and pan being provided to prevent priming and the passage of water up through the steam pipes. 43 designates the usual water-gage.

To support the forward end of the drum i 11 and relieve the front leg 12 of excessive pressure, an I-beam lit is strung between suitable supports (not shown) to which I- beam, the Steam drum 11 is connected by means of the lug or projection 45. If desired, a plate +16 through which the supply Jioe 22 to the burner extends ma be rol l a Y P vided at the forward end of the furnace, so as to improve its appearance. i7 designates the usual safety or blow-olf valve.

Although the present disclosure sets forth the use of but a single burner in one of the water tubes of the boiler, it is to be understood that it is within the spirit of this in- Copies of this patent may be obtained for vention to supply the water tubes with any desired number of burners, and that any number of steam drums may be used, and a number of boilers, if desired, may be connected in batteries, each boiler discharging into a common steam drum or header.

What we claim is,-

l. A heater comprising a drum having a group of water tubes therebeneath, a wall inclosing the tubes and providing a substantially closed chamber about the tubes, the wall so shaped as to form substantially semicircular pockets behind each tube, and burners within the inclosing wall so placed that the direct heat of the flame avoids the tubes and is reflected on said tubes by the semicircular pockets.

2. A heater comprising a drum having a group of water tubes therebeneath, a wall inclosing the tubes and providing a substantially closed chamber about the tubes, a wall so shaped as to form substantially semicircular pockets behind each tube and burners within the inclosing wall located so that the direct heat of the flame strikes the line of jointure of the semi-circular pockets and is reflected on the tubes by said pockets.

8. In combination, a substantially closed chamber having in its walls semi-circular pockets, water tubes in said pockets, and a burner located centrally of said tubes and projecting the flame against the walls of said pockets to heat said tubes by the heat reflected from said Walls.

4. In a water tube boiler, a drum having a group of water tubes therebeneath, a combustion chamber about said tubes, means in said chamber for heating the water in said tubes, a chamber about said drum, a passage adjacent one end of the drum whereby said combustion chamber and said chamber about said drum communicate, a baille eX- tending longitudinally of said drum and terminating short of the end of said drum opposite said passage to cause the products of combustion from said combustion chamber to pass lengthwise of said drum.

In testimony whereof We have hereunto set our hands in presence of two subscribing witnesses.

WILLIAM VALLACE KEMP. WILLIAM H. VAN HORN. Witnesses:

HOWARD G. BisHor, AGNES M. MOORE.

five cents each, by addressing the Commissioner of Patents, Washington, D. C.