US1699864A - Baffle for boilers - Google Patents

Description

Jan. 22, 1929,

V I 1,699,864 M. H. VON PAGENHARDT ET AL BAFFLE FOR BOILERS Filed May 14, 1925 2 Sheets-Sheet. 1

Jan. 22, 1929. 1,699,864 M. H. VON PAGENHARDT ET AL BAFFLE FOR BOILERS Filed May 14, 1923 2 Sheets-Sheet 2' ooooooooog oooooo //1 vz/vrams /7.' H Van Page/ward,

14! I Bar/ref 47 TOR/YEYS Patented Jan. 22, 1929.

UNITED s'rnrss MAXIMILIAN H. ou mennnnnnr, or s'r. LOUIS, AND WARD r. BARKER, or mums 1,699,864 rnrsur OFFICE.

CITY, MISSOURI, ASSIGNORS, BY DIRECT AND MESNEASSIGNIVIENTS, Q15 ONE-THIRD TO MAXIMILIAN H. VON PAGENHARDT, OF ST. LOUIS, MISSOURI, AND TWO- THIRIDS. TO B. P. LIENTZ OIL FURNACE COMPANY, OF KANSASCITY, IYIISSOURI, A CORPORA- TION OF DELAWARE.

RAFFLE non Bonuses.

Application filed May 14, 1923. Serial No. 638 749.

This invention relates to improvements in bottles for Water tube boilers, and particularly to :1 device of this kind by the use of Which the products of coinlmstion Within a boiler may be controlled in n manner to produce much greater heating efficiency than was possible with any oi the battling arrangements heretoiore used.

As is well known, runny difi'erent methods have been employed to bafile, or control, the hot gases emanating from the burning fuel Within the furnace of a ste'zi'm boiler of the Water tube type, so thdt sziid gases may act upon the Water tubesin a manner to transmit the maximum amount of heat-thereto,- but none of these lnethods-heveb'eerr entirely suc-' cessful, despite the fact} tliet some of them have been in usefor many yeiirs.

One of the methods of baffling heretofore employed is the so called Vertical method which involves the use-0 in plurality oi? bafiles' arranged at approximate right s ngles to the Water tubes, and spaced apart orienon-1 he other. In following out the} vertienl method, the hot gases pass and rm s 'ersely of the nest-of tubes to heat the water Within said tuhesgbnt' one oftlie objections to thi's method is thiit' each" tn-be is locnted a" plurality of zones-of difierent temperatures;

Another method or'b'affiin usedis the horizontal method which involves the use of a plurality of baiiies extending longitudinally of the Water tubes and located one above the other. While the horizontal method tune tions with greater efliciency than the vertical method, inmost types of Water tube boilers, still it not entirely successful due tothe feet that the shrinkage of the gases at lessening temperatures is not taken into consideration, consequently a great loss of heat is suiiered. Another disadvantage in connection with the horizontal method is that it is necessary to emit a row water tubes to permit the introduction of each intermediate bzrflle, thus reducing the heating surface of the boiler and permitting the gases to short circuit.

The bafllediselosed in the present application is intended for use in boilers provided with a pair of horizontal battles and provides means whereby the hot gaseswithin a boiler may be scientifically controlled, and as the passage-Ways through whichsnid gasespass are reduced in size at the points Where the gases have been reduced in volume, due to their shrinkage at lessened temperatures,- the maximum heating eiiiciency is obtained from said gu ses throughout their passage through the boiler. V t

With the foregoing and other-objects in View, the invention comprises the novel construction, combination and arrangement of parts hereinafter more specificslly described end illustrated in the accompanying (new lngs wherein is shown thepreferred embodiment ofthe intention. However, it is to be understood that the invention coniprel'iencls changes, variations and inodificstions which come within the scope or the autumnal-em ts appended. I i i Fig. I is a vertical section through an ordinary boilerof the-water tube type, showing our improved bofl'le, and associated there with, portions of said boiler being shown in elevation. i it i Fig. U is a horizontal sectiouon line li -II ot Fig. I, portions of the housing being omitted. i i A Fig. 111 is nfrsgnientsry cross section through the tube nest of a. boiler,showing gour ball-1e in place therein,- s fragment of the steam chest of the boiler being shown shore snid' nest of tubes.

Fig; IV is a horizontal section of e section of our improved bafl'le," fragments of the 2rdjacent sections being assoeinted therewith.

Fig". V is u horizontnlsection oi? oneoii'thc rem-most sections of our bnfiie.

Fig. V1 is u modification of our invention wherein apnir of vertical battling IlJQIl'ilJElS is eniployod.

Fig. VII is nznodified form oi? ouninvention wherein u'single inclinedbnfflingmember isemployed instead of the V-shsped baiiiihg member as illustrated in the preferred con struction. 1 i

In the drawings, A designates s boiler provided with the usual housing B of brickork or other fire-resisting material The boiler illustrated in the drawings is pro vided With n-burner C \i hereby tuellisintroduced into, and is burned within, the ho nsinn B. Arranged above"thehousingB is the tube nest E which comprises a front header F, aback header G, andaplurality of tub-es H which are connected to saidlieaders F and i ii G in the usual manner. The tube nest E is supported by the housing B in the ordinary way, and arranged above said tube nest in the usual steam chest J.

The foregoing is a very brief description of the boiler illustrated in Fig. I of the drawing, but because said boiler is of the usual construction, and in view of the fact that said boiler forms no part of the present invention, we do not deem it necessary to describe the same in detail.

Arranged longitudinally of the tube nest E, adjacent to the lower portion thereof, is bafile 1 which comprises the usual baiiie used iniboilers of the type illustrated, said baflle being-composed of a plurality of elongated members, each of which is inserted between a pair of adjacent water tubes H (Fig. III). The bafile 1 fits closely against the back header G and the front end of said bafiie is spaced a considerable distance from the front header F to provide a passageway 2 for thehot gases arising from within the housing B. a

Arranged longitudinally of the tube nest E adjacent to theupper portion thereof is a second bafile 3, said last mentioned bafiie being similar to the-baflle 1 excepting in certain particulars which will be hereinafter pointed out. i

It will be noted by referring to Fig. III of the drawing that'the individu'al water tubes of boilers of thet'ype illnstratediare so. arranged relative to each other that diagonal spaces between the tubes, or alleys as they are called, are produced. These alleys are at angles of approximately 45 to 60 to the horizontal and extend in both directions.

ldesignates our improved bafile which coinprises a pair of bafliing elements, each of which is composed of a plurality of bafile sections as shown in Figs. II and IV. The baffle sections are each provided with longitudinal edges 4 which are so shaped as to cooperate with baffle sections having similarly shaped longitudinal edges whereby said sections may be assembled to produce a. plate like baffle member having comparatively tight joints.

In use each of the baffle members is introduoed into one of the diagonal a-lleys between certain of the water tubes H, and as will be seenby referring to Fig. III the loweredges of said baiiie sections are formed at the proper angle relative to the side faces thereof, so that a comparatively tight joint will be obtained between said baflle sections and the side wall of the housing B. A complete bafile 4 preferably comprises a pair of bafile members, said bafiie members being arranged relative to each other so that they form what is approximately an inverted V, and when said complete baflle is in place within the "boiler the space between the bafiies 1 and 3 is divided into a plurality of passage- Ways,'the center or larger one of which we in the usual way.

have designated by the reference character X, the space on the left of said passageway X by the reference character Y, and the space on the right of the space X by the reference character Z.

The upper baflle 3 already referred to is divided into different parts by the baflle members of the baffle 41 (Fig. III) and a peculiarity of said baiiie 3 willnow be pointed out.

Located in the center of the baflle 3 is a longitudinal baflle member which we have des' ignated bythe reference character 3. The baffle member 3' fits firmly against the two adjacent water tubes H and said bafllc mom her also firmly contacts with the front header F and the back header G, and because the baffle members of the bafi'le 4 are in firm contact with the water tubes between which the baflie member 3 is located, it is apparent that a comparatively gas-tight upper wall is pro vided for the space X. The elongated bafllc members; of the baflie 3 which form the top wall of the spaces Y and Z, like the members 3, contact firmly, against the back header G, but instead. of extending to and contacting with the front header F, said baflle members stopyshort of.said .front header to produce passageways v5 and 6; between said spaces Y and Z and the space above the baffle 3.

The baflle 4, as shown most clearly in Fig. II, contacts firmly with the front header F of the boiler, but the rear end of said baiiie 4 stops short ofthe back header to provide a passageway 7 -between the space X and the space Y-and a passageway 8 between the space X and the space Z. v i

In the-use of a boiler provided with our improved baflie the flame and' hot gases being emitted from.v the burner G followfthe course indicated by the arrowswithin the housing I3 in Fig. I, and as said gases pass longitudinally of those water tubes which, are located below the battle 1, the water within said tubes will be heated. The gases then pass through the opening 2 and. into the passageway X, and as said gases pass longitudinally of the water tubes within said passageway X, the water in said tubes will be heated. \Vhen the gases passing through the passageway X reach the rear end thereof some of said gases pass through the opening 7 into the passageway Y, and some of said pass tln'ough the opening 8 into the passageway Z (Fig. II). The gases which have passed into the passageways Y and Z then pass longitudinally of the water tubes within said passageways, and said gases then escape through the openings 5 and 6 and pass from the boiler As already suggested, the hot gases shrink as temperature is lessened and heretofore much heating efiiciency was lost due to the fact that the same size passageway was provided for the gases throughout their passage through the boiler. In the use of our improved ballle this loss of elliciency is prevented because the sizes of the various passa eways are arranged in proportion to the volume of gases passing therethrough. It is plain in the use of our invention that said gases will be thoroughly mixed as they pass from one passageway to the other.

Each baffle section of the battle 4 is provided with a steam passageway 10 which is open at the top of said baliie and extends downwardly therein to a point adjacentto the lower portion thereof, as shown in Fig. IV and by dotted lines in Fig. I. The walls of the passageways 10 extend outwardly beyond the faces of the associated battle section and the walls of each of said passageways are provided with inclined portions 11. Formed through the inclined portions of the walls of the passageways 10 are apertures 12, said apertures being inclined relative to the face of the battle section, as shown most clearly in Fig. IV.

Arranged adjacent to the upper edge of each battle member of the battle 4 is a steam conductor 18, said conductors being extended longitudinally of said bafiie members, and each of said conductors is provided with a plurality of nipples 1st which are connected to said conductor so that they are in communication with the passageway therethrough. The lower end of each of the nipples 14 is connected to one of the battle sections in such manner as to be in communication with the passageway 10 thereof. One end portion of each of the steam conductors 13 extends beyond the boiler to a suitabl'e'steam supply and each of said conductors is provided with a controlling valve 15. Located adjacent to the rearmost end of each battle member of the ballle 4 is a pipe 16 provided with perforations 17, said pipe being arranged longitudinally of said rearmost ends of said baille members (Fig. I). The pipes 16, like the passageways 10, are in communication with the passageways through the steam conductors 15 through the use of nipples 18, and the lower ends of the passageways through said pipes 16 are closed in any suitable manner.

In the use of a boiler equipped with our improved baflle and soot-blowing device, assume that soot has accumulated on the battle members, and it. is desired to remove same. In this event, the valves 15, are opened permitting steam to pass through the conductor 13 and nipples 14 into the passageways 10 in the baflie sections, and from saidpassageways 1O forcibly through the apertures 12 into the nest of water tubes, said apertures being so located as to cause jets of steam to be directed through the alleys between the water tubes, thus obviating the danger of the force of said jets being broken by striking tubes comparatively close to the aperture from which said jet of steam is ejected. WVhen the steam is directed into the passageways 10 in the baflie section, it will also be directed into the pipes 16 and will pass from the apertures 17 therein to sweep the rear portion of the tube nest.

As has been stated, the apertures 12 in the battle sections are inclined relative to the side faces of said ballie sections, and because of this arrangement the jets of steam will be discharged in the same direction as the direction of flow of the gases in passageway into which said jets are directed, thus eliminating any tendency for the jets of steam to retard the flow of gases.

A distinct advantage in favor of our battle and soot-blowing device over those heretofore used is that it may be installed in an old boiler without tearing said boiler completely down; for instance, if it be desired to install our device in a boiler equipped with horizontal battles, it is onlynecessary to introduce our device in place. To install our device in placein a boiler having vertical baflles, it would be necessary to replace said vertical baiiies with horizontal baffles and then introduce our bafile in place.

Fig. VI illustrates a modified form of our invention wherein the bafiie members arearranged verticaly in thenest of water tubes instead of inclined as shown in the "preferred construction. lhis arrangement is used where the alleys between the water tubes are vertical and horizontal instead of inclined at or i Fig. VII illustrates a second modification wherein a single inclined bafile member is used instead of a pair of bafile members, as shown inthe preferred construction.

We claim: i

1. A battle for water tube boilers provided ion with horizontal bafiies extending the entire width of the boiler, comprising a pair of baffie members arranged between said horizontal baffles, said bathe members being arranged longitudinally of the boiler and being introduced between rows of water tubes whereby the space between said horizontal baflles is subdivided into a plurality of independent pasageways, said baflle members being so arranged with respect to said horizontal batfles and to the side walls of the boiler as to provide means of communication between said passageways only at an end of the boiler.

2. A baflle for water tube boilers provided with horizontal baffles extending the entire width of the boiler, comprising a pair of inclined baffle members arranged longitudinally of the boiler and arranged between said horizontal baffles whereby the space between said horizontal bafiles is subdivided into a plurality of independent passageways, said batfle members being so arranged with respect to said horizontal bafies and to the side walls of the boiler as to provide means of communication between said passageways only atan end of the boiler.

3. A baffle for water tube boilers provided with horizontal lea-files extending the entire width of the boiler, comprising a pair of inclined battle member arranged longitudinally of the boiler and arranged between said horizontal bafiles to produce a Vshaped bafile whereby the space between said horizontal bafiles is subdivided into a plurality of independent passageways, said V-shaped bafiie being so arranged with respect to said horizontal bafiles and to the side walls of the boiler as to provide means of comnnmication between said passageways only at an end of the boiler.

4. A baflie for water tube boilers provided with horizontal baflies comprising a pair of inclined baflie members introduced between rows ofwater tubes of said boiler, said battle members being so arra ngred between said horizontal baffles as to produce a V-shapcd bai fle whereby the space between said horizontal battles is subdivided into a plurality of indc pendent horizontal passageways, said V- shaped bafile being so arranged with respect to said horizontal battles and to the side walls of the boiler as to provide means of communication betweensaid passageways only at an end of the boiler.

'5. A baiiie for water tube boilers provided with horizontal baiiles, comprising); a pair of inclined baffle members introduced between rows of water tubes of said boiler, each of said battle members being composed of a pin.- rality of sections and said baflie members be ing so arranged between said horizontal batfles as to produce a V-shaped battle whereby the space between said horizontal 'baiiles is subdivided into a plurality of independent horizontal passageways, said V-shaped bafile being so arranged ,with respect to said horizontal battles and to the side walls of the boiler as to provide means of comm unieation between said passageways only at an end of the boiler.

6. A baflle for water tube boilers provided wit-h horizontal baflies extending the entire width of the boiler, comprising; a baflie mem ber arranged between said horizontal baflies, said second mentioned baflle being arrangial longitudinally of the boiler and being intro duced between rows of water tubes thereof whereby the space between said horizontal baiiies is subdivided intoa plurality of separate compartments, an end of said second mentioned battle being spaced from an end wall of the boiler so as to provide means of communication between said pasap'cways only at said end of the boiler.

7. A bafiie for water tube boilers provided with horizontal bafi'lcs exteni'li'ng the entire width of the boiler; comprising an inclined bailie member arranged between said horizon tal bafiles, said second mentioned bafile being arranged longitudinally of the boiler and be ing introduced between rows of water tubes thereof whereby the space between said horizontal bafiles is subdivider'l into a plurality oi. separate compartments. an end of said second mentioned baflie being spaced from an end wall of the boiler so as to provide means of communication between said pasagevays only at said end of the boiler, i

In testimony that weclaim the foregoing we hereunto aflix oursignatures,

MAXIMILIAN H. van PAGENHARDT. WARD T. BARKER.

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