US1782574A - Heat-transfer device - Google Patents

Description

INVENTOR ATTORNEYS 00000 OOOOOOOOO OOOOOOOOOOOOOOOO OOQOOOOOOOOOOOOO ooooooooooooooooo OOOOOOOOOOOOOOOO ooooooQoooooooooo E. w. JONES HEAT TRANSFER DEVICE Nov. 25, 1930.

Original Filed Nov.

Patented Nov. 25, 1930 T UNITED STATES EDWIN WALTER JonEsoE LINCOLN, ENGLAND, ssrenoa TO THE BABCOCK & witooxi PATENT OFFICE ooMrAmaoF BAYONNE, NEW JERSEY, A oonroraa'rron on NEW JERSEY HEAT-TRANSFER DEVICE Original application filed November 13, 1924, Serial No. 749,578, and in Great Britain November 23, 1923.

Divided and this application filed October 28, 1927. Serial No; 229,448.

, My inventionmore particularly relates to a :heat transfer-dev ce comprising headers, the

parts being so arranged that the tubes may readily be inserted in and removed from posit1on lnthe headers. 1

My present application is a division, of my application Serial No.'74:9,578 which was filed in the United StatesPatent Ofiice on or about November 13,1924;

My invention willbest be understood by ieferenceto the accompanying drawings, in which I have illustrated my invention in a steam boiler and in which Fig. lisi-a sectional elevation of a steam boiler. including a heat transfer device embodying my invention; Fig. 2 is a diagrammatic sectional plan View of a portion of the heat transfer device taken on the line 2-2 of Fig. 1, and Fig. 3 is a side view of a portion of said heat transfer device. Like reference characters indicate like parts throughout the drawings.

Referring now to the drawings, in which I have illustrated the preferred form of my invention, the water tubes at of the lower bank of the steam boiler in which I have shown my invention are arranged immediately above the furnace I) and extend in a longitudinal direction substantially thewhole length of the boiler from front to back, the tubes being inclined upward in a direction from back to frontand connected to vertical headers 0, d at eacli end respectively.

Above this first bank of tubes at the front end of the boiler a second bank is arranged containing, for example, eight rows of tubes 6 of shorter length than tubes at running from front to back, the tubes being preferably inclined at the same angle as the tubes at in the lower bank, At the front end of the boiler these tubes are connected to extensions f of the corresponding headers (Z of the lower bank these headers bein thus common to both banks, While at the otherend the tubes 6 are connected to vertical headers h located above the tubes a and leaving a space at the rear thereof and above said tubes a. I

' The rear vertical headers k are in turn respectively connected by short lengths of tubes to a transverse distributor or feed-box k which may very conveniently act as a cross beam carrying the upper bank of tubes, ap-

propriate provision being provided for the free expansion of the latter.

; Above the front headers f of the upper bank of'tubes a transverse steam and water drum m isarrangeol to which these headers are connected, while-according to one arrange menta series of tubes n acting asdowncoiners and arranged 111 a direction generally parallel to the water tubes 6, connects this drum to therear headers h of the upper bank, a longitudinal battle 0 being arranged ifdesired in the transverse drum between the line of y drum 1" at the rear of the boiler to the -respec tiverear headers 0 of the lower bank of water tubes at.

Preferably a baffle 42 covers the rear portion of the lower bank of water tubes a and extends from the rear of the boiler to a point slightly to the :front of the rear headers h of the upper. bank,the battle at its front end being vertical for a short distance, asshown.

It will be seenfrom the above description that a space is 'leftabove the lower-bank of tubes in, the rear part of the boiler'and in this spaceaccording to the present invention an econoinizer, indicated as a whole by the arrowed letter A, is arranged consisting of a series of vertical headers to audio connected by sli htly inclined tubes a: (see Fig.

arranged in a transverse direction in relation to the boiler. To assist in the replacing of tubes in the economizer, the headers w at one end (see Fig. 2) are made L-shaped in cross section, the Us being arranged as it were in pairs back to back so that spaces or pockets 2: facingtowards the other headers are provided for the reception of the ends of this figure the tube as by help of a space .2, has been lifted vertically into its approximate position, the tube 50 being shown as partly iuserted. A space B is preferably left at the rear of the economizer so that in conjunction with an appropriate door at the side of the boiler at the lower end .of the economizer, a tube may be angled into or out of the position 12: through an opening in the side wall as at 10, notwithstanding a narrow passageway between the adjacent boilers of a battery.

In some cases, in addition to the economizer. a super-heater comprising tubes lconnected to an upper transverse header 2 and a lower transverse header 5, the tubes passing between the boiler tubes 6 of the upper bank, is provided. As the superheater constitutes no part of the invention covered by the present application, it need not be described in detail.

The general course of theworking fluid in the boiler described above is as follows:

The feed entering the lower end of the economizer A as at 11 passes successively through the vertical rows of tubes as to its outlet at the top of the front of the economizer, a connection 6 passing thence to the trans verse feed-box is above the vertical rear headers h of the upper bank of water tubes. Owing to the upward slope of these tubes. as evaporation takes place, the working fluid passes to the front headers f where it mixes with steam from the lower bank, the admixture passing into the front transverse drum m and thence to the main drum 1 at the rear of the boiler. From here the steam passes through the angled tubes 4 of the superheater described aboveto the collector header 5 and thence to the main steam pipe. Circulation is set up in the boiler as follows From the drum m the water passes through the tubes t to the drum 1', then through tubes u to headers and through the tubes a and headers 7 back to the drum on.

IVhile I have illustrated my invention in connection with an economizer, it will of course be understood that it is applicable to heat transfer devices other than the economizer, such, for example, as an air heater or a superheater; it will also be understood that modifications in the details of construction may be made without exceeding the scope of tion and arranged back to back thereby forming inwardly opening pockets, said pockets being of sufiicient width to receive the ends of said tubes.

2. In a heat transfer device, spaced chambers, fluid tubes connecting said chambers, one of said chambers being provided with pockets each facing a tube receiving opening in the other chamber, the width of said pockets being greater than the diameters of said tubes.

3. In a heat transfer device comprising headers connected by tubes, the headers at one end of said tubes being provided with pockets each facing a tube receiving opening in the other headers, said pockets being of suficient width to receive the associated ends of said tubes.

In aheat transfer device comprising headers connected by tubes, the headers at one end of said tubes being L-shaped in cross section and arranged back to back to form pockets facing towards the other headers, said pockets being of sufficient width to receive the associated ends of said tubes.

5. In a heat transfer device comprising headers connected by tubes, the headers at one end of said tubes being arranged side by side and provided with pockets each facing a tube receiving opening in the other headers, said pockets being of sufficient width to receive the associated ends of said tubes.

EDWIN WALTER JONES.

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