US1629273A - Boiler - Google Patents

Description

. May 17, 1927.

D. S7 JACVOBUS BOILER Original Filed April l5, 1919 u an auna n a o o on on u o u e o una n o o u o una une a n o nanou u no n ooo o a n 35 and water drum 12 by Patented MayV 17, 1927.

UNITED STATES PATENT OFFICE.

DAVID S. JAGOBUS, F JERSEY CITY, JERSEY,A'ASSIGNOR T0 THvE FAIBCOCK &

wILcox coiuPnNY, or BAYONNE," new unse?, A

CORPORATION 01E NEW JERSEY.

nonna.

Original application led April '15, 1919, Serial No. 290,180. Divided and this application filed- November 18, 1920. Serial No. 424,856. l

In the drawings, Fig. 1 is -a vertical trans-l verse section through a boiler showlng one embodiment of my invention and Fig. 2 1s a side lview of the economlzer with parts removed.

' Like lreference 'characters indicate like parts throughout the drawings.

My present application is adivision of my application Serial No. 290,180, which wasgfiled in the Patent Oiice on -or about 4April-1.11919.

Referring to the drawing, the numeral 1 designates an upper 'bank of horizontally in`v clined water tubes, and 2 a corresponding 'lower bank shown as comprising three rows. The combustion chamber 3 below the lower bank of tubes extends' substantially the entire lengthof the tubes, the boiler being fired at both front and rear by underfeed Stoker mechanisms 3 of' well known construction,v The lower ends of the tubes of alternate vertical rows of the upper bank are' connected to downtake headers 4 and 5, and the upper endsof said tubesare connected to uptake: headers 6 and 7, while vthe'lo'wer ends of. the tubeso ter'nate vercomes in contact with the hottest gases will .contain the Khottest water. Each -sectical rows of the lower ba are connected to header sections 8 and 9, andthe Aupper V ends of .said tubes are connected with -drop-leg extensions 6 and 7 f of thevr uptake headers 6 and 7. The headers 4 and 5 are vconnected .to the header sections 8 and 9, respectively, by relatively long nipples 10 and 11, and the upperends of the headers 4 and 5 are connected to "a transverse steam nipples 13 Aand 14. Said vdrum is also connected to the uptake headers- 6 and 7 by two rows of horizontal tubes 15. A'baille 16 extends over the upper 'row of tubes 2 from the header sections 8 iand 9 for a portion of their length, anda liveringl the gases to an uptake/flue in.'

transverse vbaille 17 divides the upper bank of tubes into two passes, so that the gases.

will iow over the banks of tubes in the generaldirection -indicated by' the arrows to the outlet .connection 18, the latter de A -'which is located an economlzer comprising u Ya 'series of horizontal ox 19 connected byl tubes 20, the tubesiin adjacent rows preferably being staggered with respectto `each-'ot-h'e'r' for their entire length as illus- ThisV economizer may constitutethe high pressure stage 'of an economizer syspressure to 'it 11101'6 even upward downwardly. :parent from Fig tem,

mizer are preferably of wrought iron or wroughtsteel which Athey are subjected. As shown, it l's divided into three sections, water entering lthe uppermost to withsta'ndthe high 4boiler section through the pipe 21 and leaving said section through the pipe 22, by which ythewater is delivered tothe middle 'section and leaves the latter through livers it to thev lowermost section, from the -pipe 23, which idewhich the water iiows through a pipe 24to the .steam and water drum 12, the 'low of water .through the pipe 24 being controlled.

by a feed valve 24 for regulating the sup-- plyof water to the boiler.

By arranging described, .the advaontages of vthe counterilow principle 'are secured as the uppermost of the three `sections which come in contact with the coolest gases will contain the coolest water, the middle section which comes in contact with the gases of'an intermediate temperature somewhat hotter water, and

the third and lowermost section, which the economizer in the way tion is fed `at lthe lower part andthe I heated water passes away from the upper part.- This results in the water flowing upwardly throughout each section, which gives distribution betweenthe differi .ent tubes than should the water be fedA t downwardly through the sections'. by feeding the water upwardly each section inthe way vflowing through eachl tube'fiows in aslightly 'locity of the water is high as compared with whatit would 'be'i it were permitted to ow vthrough two or more rows in making a single pass across the throughout described, the water` direction and tends to more thorthrough the various, Y

flue. The vef Vlocit-y of the water through the tubes itself assists in causing an even distribution of the water across the tubes of a row and further assists in sweeping out any air or contained gases that might tend to cling to the walls of the tubes which result is further facilitated` by inclining the tubes upward' the water flowing downwardly throughthe connections is higher than that in the economizeitubes and is sufficiently high to carry along any gas or vapor from the top of each section to the bottom of the next sectionbelow.

A primary superheater 25 isI preferably located in the triangular space above the upper bank of tubes, and a secondary-superheater 26 is located in the secondary combustion chamber between the two banks of tubes, the steam from the drum 12 being .delivered through the pipe 27 to the superheater 25 and from the latter through a pipe 28 to the upper box of the superheater 26. The superheated steam is delivered to the main through a connection from the lower box 26 of the superheater 26. A second superheater 29 is also located in the secondary combustion chamber betweenthe two banks of tubes, to the `upper cross-box' of which steam is delivered from one of the stages of a steam turbine, and the steam so re-superheated, returned through a connection from the cross-box 29 to a lower pressure section of theturbine. All of these superheaters comprise cross-boxes connected by U-tubes and all are arranged with V.their upper legs substantially horizontal so that they can be Hooded and drained. Also, the loops for the superheaters 26 and 29 should be soproportioned that they can be introduced by passing them between the nipples 10 and 11. l

Vhat I claim and desire to secu-rc by Let-- ters Patent of the United States is 1. In con1bination,`a flue having a vertical portion through which the heating gases from the boiler pass upwardly, an econorows until it is discharged from the uppermost row of tubes of each section, and connections for causing the entire amount of feed water to flowlirst through the uppermost section and successively through the other sections and into the boiler.

2. In combination, a flue having avertical portion through which the heating' gases from the boiler passupwardly, an economizer having a plurality of sections located in said flue, each section comprising a plurality of rows of substantially horizontal tubes spaced uniformly from side Lto side of the flue through which the Water and any contained gases flow back and forth, first flowing in parallel through the lowerinost row of tubesl of each section and` then back and forth in parallel through successive rows until it is discharged' from the uppermost row of tubes of each section, and connections shielded from the heating'gases for causing the entire amount of feed water to ow first through theu'pperrnostv section and successively through' the other sections and into the boiler, the internal cross sectional area of the connections between sections being-less than the sum of the internal cross sectional areas of the tubes in a single horizonal row. Y

3. ln combination, a flue having a vertical portion through which the heating gases from the boiler pass upwardly, an economiz'er having a plurality of sections located 1'n said flue, each section comprising a plurality of rows of substantially horizontal tubes spaced uniformly from side to side of the flue through which the water and any contained gases flow back and forth, first flowing in parallel through the lowermost row of tubes'of each section and then back and forth in parallel through successive rows until itis discharged from the uppermost row of tubes of each section,'and connections shielded from the heating gases for causing the entire amount ofvfeed water to flow first through the uppermost section and' successively through the other sections and into the boiler.

DAVID s. JAooBUs.

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