US1799856A

US1799856A - Furnace regenerator

Info

Publication number: US1799856A
Application number: US285324A
Authority: US
Inventors: Frank R Mcgee
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-06-14
Filing date: 1928-06-14
Publication date: 1931-04-07
Anticipated expiration: 1948-04-07

Description

April 7, 1931. F. n. MccsEE FURNAGE REGENERATOR Filed June 14, 1928 3 Sheets-Sheet PE4/VK E.

Patente'd Apr. 7, 1931 PATENT OFFICE f FRANK 1R. MCGEE, OF STEUBENVILLE, OHIO FURNACE REGENERATOR Application led June 14,

Y This invention relates to regenerative chambers and checkerwork therefor and, while not limited thereto, relates to regenerative chambers for open hearth furnaces, and has for one of its objects the provision of a regenerative chamber of improved form whereby the gases will be distributed to and collected from the checkers in an improved manner.

Another object is to provide a novel form of checkerwork whereby a materially greater heat exchanging area is provided than in the standard form of checkers, and whereby all the checkers are evenly heated.

A further object is to provide an improved form of support for the checkerwork.

A still further object is to provide means for regulating the flow of gases through some of the lvertical checker lues whereby the checkers will be evenly heated.

In the drawings:

Figure 1 is a sectionalplan of a checker chamber constructed in accordance with this invention, taken on the line I-I of Figure 2.

Figure 2 is a sectional side elevation through the chamber.

Figure 3 is a transverse sectional elevation through the checker chamber.

Figure 4 is an enlarged sectional plan of a portion of the checkers of the checker cham- Figure 5 is an elevation taken on theline V--V of Figure 4.

Figure 6 is a sectional elevation taken on the line VI-VI of Figure 5.

Figure 7 is a large scale detail plan ofseveral of the assembled checker bricks.

Figure 8 is an enlarged side elevation of one of the checker bricks.

Figure 9 is an enlarged plan of one of the checker bricks.

Figure 10 is an enlarged plan of several checker bricksz of a slightly modified form, in assembled posltion.

Figure 11 is a side elevation of several of the assembled bricks of Fi re 10.

ReferringE more particu arly to the drawings, the numeral 2 designates the regenerative chamber as a. whole, which is of the usual outline, and has one end provided with a port 1928. Serial No. 285,324.

3 communicating with the downtake 4 of an open hearth furnace, while its other end is provided with a port 5 communicating with a conduit 6 leading to a stack and air supply conduit (not shown).

A plurality of transversely spaced checker supporting walls 7 extend longitudinally along the bottom wall of the chamber 2 and are provided with openings 8. The walls 7 are of constantly increasing height from the furnace end of the chamber toward the stack end thereof, so that their top faces are inclined upwardly in the direction of iow of the gases. The spaces between the walls 7 form a gas collecting and air distributing chamber 9 of constantly increasing area toward the outlet or stack end of the chamber, while the openings 8 form equalizing passageways for equalizing the pressure of the gases and air in the distributing and collecting chamber 9.

A checker supporting diaphragm 10 is supported on the walls 7 and is preferably formed from a plurality of horizontal layers ofhollow tiles 11 laid up in high temperature cement. The tiles 11 may have roughened surfaces, if desired, so that the cement will form keys between the tiles, since the tiles 11 are' adapted to be self-sustaining between the walls 7. The tiles of the several layers are laid up with their openings in vertical alinement so as to form vertical lues 12 which communicate with' the vertical iues of the checkers to be described.

A checkerwork A is built on thediaphragm 10 and is composed of a plurality of intersectin yvertically disposed rows 13 of cross shape bricks 14. The bricks 14 may vary in detail but consist essentially of a pair of parallel-arms 15 of relatively heavy, square crosssection and a pair of parallel arms 16 of relatively light or small and round cross-section and extending at right angles to the arms 15. The bricks 14 are laid up with their relatively heavy cross-section arms 15 extendingvertically, and with their relatively light crosssection arms extending horizontall The verticall disposed arms 15 of each ayer of bricks o l each row are arranged in alinement with and contact with the arms 15 of the adj acent layers of bricks in the same row, while the horizontal arms 16 of the bricks are spaced a short distance from the arms 16 of the next adjacent bricks. The arms 16 have their vertical edges beveled, as at 18, and the space between the ends of the arms 16 are so gaged that the beveled edges 18 of the arms 16 of the bricks of the intersecting rows will abut and be supported against each other. The space between the arms 16 of the bricks of intersecting rows form vertical flues 19, and the spaces between the intersectin rows of bricks form main vertical flues 20 w iich communicate with the ues 12 in the diaphragm 10.

By4 laying up the bricks 14 with the relatively heav arms disposed vertically and in contact wit the vertical arms of the abutting bricks of the same row, transverse spaces or openings are provided above and below the relatively light or reduced cross-section arms 16, which openings communicate with the vertical fiues 19 between the ends of the arms 16 and with the next adjacent main flues 20, thus forming transverse passageways 22 which serve as equalizing and distributing passa eways through which the gases may How om one main flue 20 to the other, and through which the heated gases pass to the flues 19 between the ends of the arms 16.

The arms 15 of the bricks 14 are preferably interlocked with each other and, for this purpose, the lower arm 15 is provided with a recess 24 in its end wall, and the upper arms 15 have their end walls provided with a projection 25 so that the projection 25 of the upper arm of one brick is fitted into the recess 24 of the lower arm of the next brick above.

The checker sup orting diaphragm 10 and the checkerwork are of the same vertical height throughout, and the checkerwork terminates short of the top of the top wall of the regenerative chamber so as to provide a gas distributing chamber 26 of gradually reduced area, which causes a more even distribution of the gas than a chamber of equal size.

The lower ends of the iues 12 are provided with choke plugs 28, which serve to choke the flow of gases through the checkers and thereby build up a sufficient gas pressure to cause equal distribution throughout the checkers.

The novel form of the checkerwork A, resulting from the novel shapes of the bricks 14, provides for substantially forty-tive per cent more heating surface than when checkerwork is formed from ordinary solid brick and, at the same time, provides a checkwork in which materially less brick is used. The increased heating surface provided by the novel checkerbricks 14 provides a more eflicient regeetive chamber which absorbs more heat from the gases, and consequently giv off more heat to the air or gases to be heated than a standard regenerator.

In Figures 10 and 11 I have shown a slightly modified form of checker brick which has the edges of the vertical arms 15 rounded, as at 15, so as to increase the heating surface thereof, and the arms l5 of the bricks used to construct the transverse checker walls are notched, as at 16, to form seats for the unnotched ends of the arms 15 of the bricks used to construct the longitudinal checker walls. The rounded edges 15a of the arms 15 serve to increase the size of the transverse passageways 22 between the checker lues 20, and the edges may be rounded in a more or less degree, as desired.

It will also be understood that the arms 15 of the bricks 14 may have their edges rounded, if desired, so as to increase their heating surface and also increase the size of the transverse passageways 22.

While I have shown and described one specitic vform of my invention, it will be linderstood that I do not wish to. be limited thereto since various forms of checker brick may be used to form the novel form of checkerwork and various other modifications may be made without departing from the scope thereof, as defined in the appended claims.

I claim 1. In a regenerative chamber a plurality of vertically disposed transversely spaced and longitudinally extending checker sup porting walls having transverse openings therethrough forming equalizing passageways for the gases, a horizontal checker supporting diaphragm supported on said checker walls and composed ot hollow tiles laid up in high temperature cement, the openings in said tiles forming vertical fiues through said diaphragm, a checkerwork supported on said diaphragm and having vertical and horizontal passageways therethrough and means in at least some of said vertical lues in said diaphragm adapted to regulate the flow of gases therethrough so as to build up a sufiicient pressure resistance to the flow of the gases to compel an equal distribution thereof throughout the checkerwork.

2. In a regenerative chamber, a plurality of vertically disposed transversely spaced andlongitudinally extending checker supporting walls having transverse openings therethrough forming equalizing passageways for the gases, said walls having their top faces inclined upwardly in the direction of flow of the gases, a checker supporting diaphragm mounted on said checker walls and composed of hollow tiles laid up in high temperature cement, the openings in said tiles forming vertical filles through said diaphragm, and a checkerwork supported on said diaphragm and having vertical and horizontal passageways therethrough, at least some of said vertical passageways registering with the vertical filles in said diaphragm, said diaphragm and said chcckerwork being of the same vertical dimension throughout their area so as to follow the inclination .of the top of said checker supporting walls.

3. In a regenerative chamber, a plurality of vertically disposed transversely spaced and longitudinally extending checker sup,-l porting walls having`- transverse openingsl therethrou h forming equalizing passageways for t e gases, said walls having their top faces inclined upwardly in the direction of flow of the gases so as to form a gas collecting chamber of constantly increasing area toward the outlet of said chamber, a checker supporting diaphragm mounted on said checker walls and composed of hollow tiles laid up in high temperature cement, the openings in said tiles forming vertical flues through said diaphragm, and a checkerwork supported on said diaphragm and having 20 vertical and horizontal assageways therethrough, at least some oi) said vertical as`` sageways., registering with the vertical ues in said diaphragm, and said diaphragm and said checkerwork being of the same vertical 9,5 dimension throughout their area so as to follow the inclination of the top of said checker supporting walls and form a gas distributv ing chamber of gradually decreasing area.

4. A checkerwork for regeneratige chamau bers and the like, composed of intersecting vertical rows of cross-shaped bricks, said rows of bricks being spaced a art slightly less than the width of one bric said bricks having the ends of their horizontal arms spaced arms abutting t e vertical arms of the next brickof the lrow in a vertical direction, and the horizontal arms of the bricks of the intersecting rows of bricks abutting for ory a v bricks, said bricks being laid up so that the ends of their vertical arms abut the ends of the vertical arms of the next brick of the row in a vertical direction, and the horizontal arms of the bricks of the intersecting rows of bricks abut for only a portion of their area so as to form horizontal and vertical passageways at the points of intersection of the bricks of' the intersecting rows of bricks.

6. A checkerwork for regenerative -chambers and the like, composed of two series of lvertical rows of solid bricks, said rows of bricks of one series of rows being arranged 'at right angles to the rows of the other series to form vertical flues, said rows of each of said series of rows beiaig spaced apart not i5 more than the width cfa single brick, said apart' and havin the ends of their vertical m hand.

y FRANK R. McGEE.`