US1808169A

US1808169A - Heat transfer device

Info

Publication number: US1808169A
Application number: US372269A
Authority: US
Inventors: David S Jacobus
Original assignee: Babcock and Wilcox Co
Current assignee: Babcock and Wilcox Co
Priority date: 1918-09-04
Filing date: 1929-06-20
Publication date: 1931-06-02
Anticipated expiration: 1948-06-02

Description

June 2, 1931.

D. S. JACOBUS HEAT TRANSFER DEVICE Original Filed Sept. 4. 1918 3 Sheets-Sheet l INVEN OR ATTORNEYS.

June 2, 1931. D. s. JACOBUS 1,808,159

HEAT TRANSFER DEVICE Original Filed Sept. 4. 191a a Sheets-Sheet 2 INVENTOR 5.

June 2, 1931. D. s. JACDOBUS 1,808,169

HEAT TRANSFER DEVICE Original Filed- Sept. 4, 1918 3 Sheets-Sheet 5 Fi LZ INVENTQR ATTORNEYS.

Patented June 2, 1931 UNITED STATS PATENT OFFICE DAVID s. .moonns, or MONTCLAIR, NEWJERSEY, assrenon TO THE BABCOCK & WILCOX COMPANY, or BAYONNE, new JERSEY, A CORPORATION OF NEW JERSEY HEAT TRANSFER DEVICE Original application filed September 4, 1918, Serial No. 252,550. Divided and this application filed .Tune 20, 1929. Seria1 No. 372,269.

This invention relates to a novel and improved form of heat transfer device, and is a division of my copending application Serial No. 252,550, filed September 4, 1918, which has matured into Patent No. 1,729,-

259, dated September 24:, 1929. The novel features of the invention will be best understood from the following description and the annexed drawings, in which Fig. 1 is a vertical sectional View through an economizer constructed according to the invention. I

Fig. 2 is a sectional view of the structure shown in Fig. 1, and taken approximately,

15 on the line 22 of Fig. 1.

Fig. 3 is a fragmentary sectional view on an enlarged scale, showing the relation of the headers at one end of the tubes.

Fig. 4 is a fragmentary sectional View taken approximately on the line H of Fig. 3. For the purposes of illustration, I have shown the invention as applied to an encon omizer 1 disposed above a boiler having two steam and water drums 2 and 3, from which hot gases pass upwardly through flues 4 and 5. Disposed in the flue 4 is the economizer and the hot gases after passing over the tubes of the economizer are drawn outwardly as by a fan 6 and discharged through a fine 7. A similar arrangement may be used in the flue 5.

The economizer comprises a plurality of tubes 8 extending across the gas pass formed by the line, and connected at their opposite ends to a plurality of headers 9. 'These headers are arranged in groups as plainly shown in Figs. 2, 3 and at. In these figures the groups are shown as each comprising a pair of headers placed close together and with sufiicient space between the headers of adjacent groups to permit the passage of a tube 8. The tubes are arranged in trans, verse rows and their ends are disposed in tube holes in the faces of the headers, the ends of the tubes being bent as plainly shown in Fig. 3, so that the greater portion of the tube lengths are substantially uniformly spaced apart in the row, and this spacing is preferably less than a tube diameter or no greater than such a diameter. ,The tubes in adjacent rows are staggered,

as plainly shown.

In each header there are shown two longitudinal rows of tube holes, the holesin each row forming a substantially straight line longitudinally of the header. In each of these rows the tubes are arranged in pairs with a space between the pairs sufficient to permit passage of one of the tubes 8, so that when a tube in any row is to be removed or replaced, it may be easily moved into a space 10 between adjacent transverse rows, and then moved horizontally or transversely with respect to the headers into the space between groups of headers- The tubes in one row have their ends bent as indicated atll and 12, one tube end being bent more than the other so as to bring the tubes in the longitudinal row in staggered relation with respect to each other. In the other longitudinal row of the same header the tube'ends are bent as indicated at 13 and 14, the bend 13 being a reverse bend and the bend 14 being a simple bend or in one direction only. By this arrangement the staggered effect is obtained in all rows, andv at the same timethe" tube ends may enter the cylindrical face 15 of a header substantially normal thereto and also directed towards a handhole l6 providedon the opposite side ofa header. Such handholes may be provided with the usual fittings 17. This method of bending the tube ends also lends'itself to the arrangementof headers shown, two of the tube endsll and 12 being used on headers which'are on opposite sides of the space between groups, while the ends of the form indicated at 13 and 1d are used on the adjacent partsof headers in a group. The result is a substantially uniform spacing of tubes completely across the bank formed by a plurality of groups of headers and their associated tubes.

I claim 1. In a heat transfer device, a gas pass, a plurality of headers on each side of the pass and connected by tubes extending there across, the headers on one side of the pass being disposed in groups spaced apart, with the headers in each group closely adjacent each other, and with some of the tubes bent at their ends to bring them opposite the space between said groups. I

2. In a heat transfer device, a gas'pass, a plurality of headers on each'side of the pass and connected by tubes extending there: across, the headers on one side of the pass being disposed in groups spaced apart, with the headers in each group-closely adjacent each other, with some of the tubes bent at their ends to bring them opposite"t'he space tw Said swap th tub s csne cte t headers in adjacent" groups being arranged in rows extending transversely of the head-- ers, and. the tubes in one of said rows being substantially unlformly spaced.

3. In a heat transfer device, a gas pass, a

plurality of headers on each side of the pass and connected by tubes extending thereacross, the headers on one side of the pass being dlsposed in groups spacedapart, with r the headers in each group closely adjacent each other, with some 'of thetubes bent at their ends to bring them opposite the space between said groups, the tubes connected to headers in adjacent groups being arranged in rowsextending transversely of the head ers, the tuhes in one of said rows being sub stantially uniformly spaced, and the tubes in adjacent transverse rows being staggered with respect to each other.

4:. In a heat transfer device, a gas pass, a plurality of headers on each side of the pass and connected by tubes extending there'-.

across, the headers on one side of the pass being disposed in groups'spac'ed apart-with the headers in each group closely adjacent" each other, and with someof the tubes bent bent in the same direction in different amounts. I

7. Ina heat transfer device, a'row of headers arranged in pairs with the two headers in each pair closely adjacent each the nd. Pa ews, apart n e; row, theheaders in each pair having curved faces with two longitudinally extending rows of tube holes therein, the tubes having their ends entered, in said holes, the tube endsentering adjacent rows ofholes inthe twoheadrs being alternately bent in reverse, and simple bends, and the tubes entering the other rows of holes being alternately bent in the same direction but in different amounts, said header faces being curved and1 the tube ends enteringsaid holes substanf-j 'tially normal to the faces.

'8. In a'heat transfer device, a gas pass,

a plurality of headers on each side of the pass and connected by tubes extending thereacross, the headers onion ejside of the;

pass being disposed in groups-spaced apart,

DAVID, s JAGOBUS- at their ends to' bring them opposite the I space between said'g roups, the tubes connectedto headers in adjacent groups being arranged in pairs" of rows extending transversely of, the headers. V r

5. In a heat transfer device, a gas pass, a plurality of headers on each side' of theipass and connected by tubes extending thereacross, the headers on one side of the pass being disposed in groups spaced apart, with the headers in each group closely adjacent each other, and with some of the :tubes bent at their ends to bring them opposite the space between said groups,the tubes connected to headers in adjacent groups being arranged in pairs of rows extending trans;- versely of the headers, the tubes in each rowbeing spaced apart a distanceless than a tube diameter and the distance between adjacent pairs of rows exceeding a tube diameter. V

6, In a heat transfer device, a row of headers arranged in pairs with the two headers in each pairclosely adjacenteach other and'the pairs spaced apart in'the I,

19W he er n a Pa r levi sv u d