US2511794A - Cross tube straddle type of steam - Google Patents

Description

June 1950 J. P. BADENHAUSEN 2,511,794

CROSS TUBE STRADDLE TYPE OF STEAM GENERATOR FURNACES Filed April 6, 1946 2 Sheets-Sheet 1 I I/ l I 1 In,

INVBVTOR.

,lll orney a Jilin Phi/(l): fiddeaiamrea June 13, 1950 J. P. BADENHAUSEN CROSS TUBE STRADDLE TYPE OF STEAM GENERATOR FURNACES 2 Sheets-Sheet 2 Filed April 6, 1946 oooom own" I N VEN TOR. filnlkillipsflodmbanz Patented June 13, 1950 CROSS TUBE STRADDLE TYPE OF STEAM GENERATO R FURNACES John Phillips Badenhausen, Philadelphia, Pa.

Application April 6, 1946, Serial No. 660,247

This invention relates to steam generating furnaces and more particularly to improvements in furnaces suitable for use in burning fuel of varied types and sizes. This invention further relates to steam generator furnaces in which a gas producer action is effected with subsequent combustion of the combustible gas in an improved manner.

In accordance with the present invention improved provisions are made for the introduction of the fuel and air and the removal of the noncombustible portions or ash resulting from the burning of the fuel.

In accordance with the present invention, also, an improved character of arch construction is provided for promoting the combustion of the combustible gas constituents separated and produced below the arch.

Other advantageous features of the invention will be apparent from the specification and claims.

The nature and characteristic features of the invention will be more readily understood from the following description, taken in connection with the accompanying drawings forming part hereof, in which:

Figure 1 is a longitudinal sectional view through a preferred embodiment of the invention, taken approximately on the line I-I of Fig. 2;

Fig. 2 is a vertical transverse sectional view taken approximately on the line 2--2 of Fig. 1;

Fig. 3 is a, horizontal sectional view taken approximately on the line 33 of Fig. 2;

Fig. 4 is an enlarged view, partly in elevation and partly in vertical central section, of a screw forming part of the present invention; I

Fig. 5 is a transverse sectional view of the screw shown in Fig. 4 and taken approximately on the line 5-5 of Fig. 4;

Fig. 6 is a sectional view, enlarged, taken approximately on the line 6-6 of Fig. 2;

Fig. 7 is a sectional view taken approximately on the line 1-1 of Fig. 2; and

Fig. 8 is an enlarged fragmentary view, in

elevation of a portion of a screw, forming part of the present invention, for providing uniform Withdrawal of ash.

It should, of course, be understood that the description and drawings herein are illustrative 5 Claims. (Cl. 122-326) merely, and that various modifications and changes may be made in the structure disclosed without departing from the spirit of the invention.

Referring now more particularly to the drawings, in which a preferred embodiment of the invention is illustrated, the steam generator furnace preferably includes a vertical front wall II), a vertical rear wall II, vertical side walls I2 and I3, a top wall I4, within which a steam and water drum I5 is centrally and longitudinally disposed, and a front bottom wall It of a peculiar shape as hereinafter explained.

Spaced forwardly from the rear wall II, and upwardly extending, a centrally disposed transverse bridge wall I1 is provided which functions as the rear boundary of a gas generating and combustion space.

The front wall II) is provided, intermediate the top and bottom thereof, with suitable fuel supplying apparatus I8 for delivering fuel onto a horizontal bed in the space between the front wall III and the bridge wall I1 and between the side walls I2 and I3. The fuel supplying apparatus It may be of any preferred type but is preferably such as that shown in my application for Letters Patent filed September 25, 1944, Serial No. 555,- 627, now abandoned and January 20, 1947, Serial No. 723,042, now abandoned.

Each of the side walls I2 and I3 comprises, at the lower part, an upwardly extending portion IQ of refractory material formed integral with the bottom wall It and on which a pair of lower water headers 20 and H are supported.

The lower water header 20 is connected to the steam and water drum I5 by a bank of steam generating riser tubes 22 which extend from the lower water header 20 upwardly along the side wall I2, as at 22a, then transversely and with an upward inclination as at 22b, to the side wall I3, then vertically upwardly along the side wall I3, as at 22c, and then across the interior of the top wall I4, as at 22d, to the steam and water drum I5. The lower water header 2| is preferably connected to the steam and water drum I5 by a bank of tubes 23 disposed in alternating relationship with respect to the tubes of the bank of tubes 22 and these tubes 23 extend from the lower water header 2| vertically upwardly, as at 23c, along the side wall I3, then transversely and with upward inclination as at 23b to the side wall bottom wall We. The screws 35, at their rear l2, then vertically upwardly along the side wall ends, are supported in suitable bearings 43 and I2, as at 23c, and then across the interior of the are in communication with an ash pit 44 for top wall M, as at 23d, to the steam and water the reception of ash delivered from the furnace. drum IS. The tubes of the banks of tubes 22 and 5 The screws 35 are closed at their ends by end 23 at the central part where the tube portions caps 45 which are removable for cleaning.

22b and 23b are close together (see Fig. 7) thus In the form of screw illustrated in Fig. 8, the providing a screen and preventing upward gas central cylindrical portion 36a is provided as in flow at the center, as hereinafter explained. A the form illustrated in Figs. 4 and 5, together with baiiie 25, of refractory material, is provided above 10 air delivery openings 38. The flanges 31a are the central crossing point of the tube portions constructed to increase in diameter in steps or 22b and 23b of the banks of tubes 22 and 23, this stages towards the discharge end so as to present baffle 25 preferably being of inverted V shape, a larger area for propelling the ash for discharge.

and extendingiromthe frontrwailj llte the Thee frentswall ltliis provided with suitable bridgewalrl'l restricting the flow-of combustiaccess and inspectionopehings 46, preferably ble gas, as hereinafter explained. about the level of the fuel bed in the furnace, and

The tubes of the banks of tubes 22 and 23 with an access opening 41 located above the junction of the tube portion-52% and 1226,, antic screws-35-v 23b and 230 and adjacent the side walls 12- andi Argasstight cover 48 is provided along the side I3 are respectively provided with longitudinally walls 12 and I3 at the lower part thereof, and a disposed refractory baille blocks 2B extending similar-- cover may be provided above the from the front wall iii to the bridgeewall I]; The; ashpit 44 andthe rear ends of the screws 35 for baflfie blocks 26 with the central baffle 25, restrict preventing the escape of carbon monoxide gas,

the upward flow of combustible gas, aerhereinhydrogen and other gases distilled from the coal after explained. and released in the lower part of the furnace.

Theptubes ot.-the bankswofytubes :22oandri23oat Theamodevosoperatione will now bepointed nut. the-junction-of thertube portions 22m and;'22b, Fluielvsuchta-sranthracitecr bituminouscoal .of

and 23a and 23b, and adjacent: thaasider-watls varied sizesor types; coke breeze,- woocl Wastes, are also p e h ud al y disposed combnstibleirefusesincluding tar, or the like, is refractory r bafile; blocks: 21. fm; restrictinss and vintrodnced withoutithemecessity-oi reducing the directing, the-flow ot. combustible-fees released mtenrcontentltoiadow level; and, distributed over there-below; The-,spaceszsonmach .Sidei between the bed by the fuehsnpplyingapparatus I 8 inthe the reiractory; blocksdi'and 21 andrbetweeevthe space below the transverse sections22b and 23b tube pp i n li n 2 pr videain inlet spaces ofithbitubfifiiz media. Air is introducedthrough 28c andifib andzan. air; ductilltzls provided: Prefi- 3 rtlicrwindzboxrfl to the. interior-:01? thescrews ,35 erably; onthe lexteriorqofutheofront wall wafer frum mhich it passes through the openings wand thadeiivery of airtothese smesifor combustion. upwardly bmgough m ma bed; The quantity of A il s n ismr vi ditorth r ofrthe air supplied at this location is restrictedfso as bri e wall. I] andrincludes a-transverse low teuprcnideeimompdete oxidation and: combustion header 31h which; is :DI'QVidBduPl-zffilflblfi at-the 40 wmhwcarmimthe m t d for th production samedevelasthelowerrheaders 20 The and'i releaseeofii carbon monoxide anddistilled id efl l nd h inlthe a the grasesii. mi carbon imonoxirleiand distilledgases rear of the bridge wall I], in frontotthe rear wall passing fr the fu l b dfi g ided nd divided Ii andbetweenz the sidewalls @l lrandulirarerconinqwmpwamupaswge bywthe b ffl 21: d: 25 nested. to thesteam-and waterrdrum-li brea plul d msesuwmdmm two Streams; AS t passes ralrty ot steam enerating riser tubesl'iil which the bafiles 25 it is met by air delivered thereto ared1stmbuted;in this space on each :side., The far m m fgthe tm Theycrosswise rear header; 3B,isa1so connected :to thersteam introduction, ofrthe air and the passage of the and water drum I5 by a plurality ofqsteamigem w amq th sg t th through the transverse eratingriser-tubesfl which extendat. thecentral 1 pogtmnsynb nd- 2abjzof'the-banksof 11111363 22 portion forwardly and thenin'front oflthfl'bridge and 23 promotes an intimate intermixture of the '7 w f f' combustible gas-and air thereby aiding in the ver'tmany upwardly to thmst'eam Water combustion'of the gas releasedtherebelowl The drum l5 g combustible gas preferably burns with a short Thefront bottom wall I6 mirontpf tthewbridge B5 intense flame just above the upper of the tube wall H is preferably provided .w-ithrone onz more portiom up; Any m n particles of screws -35rand has rinclmed floor portionsJGa-and fueyemramed and carried upwardby the ascend g sgziggg g i f f ash toithesflews ing stream of combustible gasare quickly ignited E sggg g detail in and burned-in these flames. The hot gases of Fi ss andfir preferably includeszar central 1101-,- combustmn thenp-ass upwardiy and rearwardly v in contact with the tubesofthe banks of the tubes 32 and with the tubes of the banks of tubes Dluraiity'of: aiirdelivery openingsjfleinthe spaces and m downwardly discharge through betweem the? COIWOhItiOZlSw of: thelifiangee The 55 the opemngs the stack (not Shown) interier of, the Screws,flaamthelmfmm ends. Theheat released ,as radiant heat of .combusare in communication-With amgghpressurenwimi ticn in the sspaeemetween the tube portions 22b, boxvsaiwhioh i connected y; awdfl-gtgflar; toy-a 22e.a,nd..22d.and;the tube portions 23b, 23c1and suitable-source ofairunder' pressure such-as a above the transverse tube por i n lb and faminot shown) The TSCIBWS'aa are supponted 23brand bBlOWvthB-tfll) wall M is effective forgonat their'frontends by drive sirafits 42:.which are erating steamior elease he steam and Water carried1insuitable bearings M and'through. which drum; the drive shafts 42 extend *fordriving thescrews The lower portions 22a and-23c of the tubes 36; Therrear endsof-the:screws35 -tortheerear 22f andl23'lamialsorsubjectedto heat transfer'and ofrthe bridge wall; I! extend beneathraz rear (I absorption bffiheatreleasedinthe conversion of the combustible portions of the fuel to carbon monoxide.

As the fuel burns, the ash residue at the lower part is directed by the wall portions Ma and 16b to the screws 35 and is moved towards the rear by the screws 35 for discharge to the ash pit M. The introduction of the air th'rough the screws 35 tends to make the openings 3!! self cleaning and contributes to the simplicity of the structure.

I claim:

1. In a steam generator, spaced side walls, a bottom wall at the lower part of said side walls and extending therebetween, an upper steam and Water drum centrally disposed with respect to said side walls, lower header means; steam generating tubes connected to said header means and to said drum and each having transversely disposed portions for separating the space between said bottom wall and said steam and water drum into an upper chamber and a lower chamber, said transversely disposed portions extending respectively from one side wall to the opposite side wall and the respective end portions of the transversely disposed tube portions being spaced at the side walls to provide spaces for the introduction of air for intermingling with the combustible gaseous material passing from the lower chamber to the upper chamber, air supply means in communication with said spaces, spaced baille members mounted on said transverse tube portions for separating the combustible gaseous constituents into a plurality of streams, means for supplying air to the lower portion of said lower chamber, and means for supplying fuel to said lower chamber.

2. In a steam generator, spaced side walls, a bottom wall at the lower part of said side walls and extending therebetween, an upper steam and water drum centrally disposed with respect to said side walls, steam generating tubes connected to said drum and each having transversely disposed portions for separating the space between said bottom wall and said steam and water drum into an upper chamber and a lower chamber, means for supplying fuel to said lower chamber, said transverse portions being inclined and crossing intermediate the side walls, the end portions of the transverse portions being spaced at the side walls to provide spaces for the introduction of air for intermingling with the combustible gaseous material passing from the lower chamber to the upper chamber, air supply means in communication with said spaces, and spaced baiile members mounted on said transverse tube portions for separating the combustible gaseous constituents into a plurality of streams for delivery with the air from said spaces into said upper chamber for combustion.

3. In a steam generator, side walls, a bottom wall, an upper longitudinally extending steam water drum, spaced lower headers extending parallel to said drum, banks of tubes each having a lower portion extending upwardly from one of said headers along the adjoining side wall and having an inclined transversely disposed section intermediate said drum and said headers, each of said tubes having an upper portion extending upwardly along one of the side walls and in communication with said drum, each of said upper portions being respectively disposed on the opposite side from the corresponding lower portion, said transverse tube sections separating the space between said bottom wall and said steam and water drum into an upper chamber and a lower chamber longitudinally disposed, and the respective end portions of said tubesections providing spac s for the introduction of air refractory members disposed above the central parts of said transverse tube sec'tionsadditional longitudinally disposed refractory members disposed adjacent said side walls and providing with said other members restricted passageways for ascending gases passing from said lower chamber to said upper chamber, means for supplying fuel below the level of said transverse tube sections, means for supplying air at the level of said transverse tube sections to said spaces for intermingling with the ascending gases, and. means in the lower part of said lower chamber for the delivery of air for partial combustion of the fuel in the lower chamber and the release of combustible constituents for delivery to the upper chamber for combustlon.

4. In a steam generator, side walls, a bottom wall, an upper longitudinally extending steam and water drum, spaced lower headers extending parallel to said drum, banks of tubes each having a lower portion extending upwardly from one of said headers along the adjoining side wall and having an inclined transversely disposed section extending substantially horizontally intermediate said drum and said headers, each of said tubes having an upper portion extending upwardly along one of said side walls and in communication with said drum, said transverse portions crossing intermediate the side walls and each of said upper portions being respectively disposed on the opposite side from the corresponding lower portion, said transverse tube sections separating the space between said bottom wall and said steam and water drum into an upper chamber and a lower chamber and the respective end portions of the transverse tube sections providing spaces for the introduction of air, refractory block members disposed above the crossing points of said transverse tube sections, additional refractory block members extending respectively from each of said side walls and providing with said other block members longitudinally disposed restricted passageways for ascending gases passing from said lower chamber to said upper chamber, means for supplying fuel below the level of said transverse tube sections, means for supplying air at the level of said transverse tube sections to said spaces for intermingling with the ascending gases, and means in the lower part of said lower chamber for the delivery of air for partial combustion of the fuel in the lower chamber and for the release of combustible constituents for delivery to the upper chamber for combustlon.

5. In a steam generator, spaced side walls, a bottom wall at the lower part of said side walls and extending therebetween, an upper steam and water drum, lower water header means, steam generating tubes extending from said header means and connected to said drum and each having transverse portions extending substantially horizontally and crossing intermediate said drum and said bottom wall, said transverse tube portions extending alternately from said side walls upwardly along the opposite side walls and separating the space between the said bottom wall and said steam and water drum into an upper chamber and a lower chamber, spaced baille members carried by said tube portions for providing a. plurality of vertical passageways between said chambers, means for supplying fuel to the lower chamber, means at the lower part of said lower chamber for supplying air for partial combustion JOHN PHILLIBS BADENI'IAUSEIL REFERENCES vCITED;

The follbwingwefrencesare of record 1111' the fife'ot-thts patent:

Number 8 UNITED. STATESIATEMIS;

Name Date Ougaweflst a1. .1- Sept. 29,: 1863 Cnwm Dec.-15, 1891 G1arkmnx.- Mar; 5, 1901 13mwen-; Man-14, 1905 Btlnkharcltuwnnu Aug. 16, 1910 Gamwbsfl.:,.----' Jan. 9, 1917 Miller .1 vMa,r; 18,-; 1919 Bady Mar; 20,1928 Friach etvaL-l ....July 5; 1932 FOREIGN-*PA'I'ENTS Country Date Number Grumman ADI; 19, 1894

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