Heat exchange – Regenerator – Checker brick structure
Patent
1997-11-03
1999-07-20
Atkinson, Christopher
Heat exchange
Regenerator
Checker brick structure
165 91, 52603, 52604, 52605, 52609, F23L 1502
Patent
active
059244771
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a new type of brick for lining heat exchangers. It is particularly useful in blast furnace stoves.
BACKGROUND OF THE INVENTION
The hexagonal model of heat exchanger brick is well known, with its hexagonal or circular longitudinal inside channels and with a lateral profile selected so that when the bricks are placed next to one another they form other similar longitudinal channels, and by modifying the lower part of the brick in the shape of a step to reduce the outside dimensions, the outside vertical channels can be made to communicate horizontally. Such a brick having a "step" in the lower part of the brick is disclosed in Romanian patent 107441B. These bricks of the prior art have the follow disadvantages: cross-section in the lower part of the contour of the brick, the vertical lateral faces of the brick are complicated and therefore cause additional problems during molding, handling during fabrication and shipment from the point of view of uniformity and of the integrity of the additional edges created; contact of the peripheral vertical faces of the brick with the thermal agent is limited to a reduced percentage of their size.
SUMMARY OF THE INVENTION
The new brick claimed by the invention eliminates the above mentioned disadvantages in that, in order to simplify molding, to eliminate non-uniform pressing and subsequent deterioration of the edges, as well as to increase the contact surface between the lateral face of the brick and the thermal agent, it has a different type of vertical lateral profile which is straight and oriented to obtain a more pronounced tapering of the lateral faces, decreasing from the top face toward the bottom face of the brick, so that the lateral contour consists of straight lines unbroken by a step, and when two bricks are placed next to one another, a triangular space is formed between them over their entire height.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an overhead view of my new brick.
FIG. 2 is a sectional view of the new brick.
FIG. 3 shows an assemblage of the bricks, demonstrating how the horizontal passages in particular are formed.
DETAILED DESCRIPTION OF THE INVENTION
Referring first to FIG. 1, this overhead view of the generally hexagonal brick shows refractory material 1 having outside edges 4 and defining seven internal vertical channels 2, six channel half-openings 3 and six corner third-openings 7. The view also shows three radial (at 120.degree.) raised portions 8 which divide the brick top into thirds by extending from the center to three corners of the brick.
FIG. 2 is a center section of the brick showing refractory material 1, internal vertical channels 2, and outside edges 4. Outside edges 4 are tapered inwardly from the top 5 of the brick to the bottom 6. Raised portions 8 are also seen on the top 5.
FIG. 3 illustrates how the bricks are assembled. It will be seen that the raised portions 8 of any three bricks placed together will form a hexagonal area in which the bottom 6 of a fourth brick fits, forming a triangular space 9 between them which communicates horizontally around the circumference of the brick. Each brick thus can have on it portions of three other bricks and in turn is placed upon portions of three bricks below it. The channel half-openings 3, being centrally located on the hexagonal sides of the brick, come together to form composite vertical channels 10 each of which communicates with other composite vertical channels 10 above and below made from the overlapping bricks. Three of the corner third-openings 7 from three different bricks come together to form a tertiary opening 11 at the juncture of three bricks; these tertiary openings 11 communicate with other tertiary openings 11 above and below and also with the central internal vertical channels 2--that is the vertical channels 2 which are located in the centers of the bricks will communicate with tertiary openings 11 above and below. In all cases, the triangular spaces 9 communicates around the periphery of the brick, permi
REFERENCES:
patent: Re27020 (1971-01-01), Hauth et al.
patent: 2833532 (1958-05-01), Ries
patent: 3436064 (1969-04-01), Hauth et al.
patent: 3549136 (1970-12-01), Baab
patent: 4150717 (1979-04-01), Balke et al.
patent: 4346753 (1982-08-01), Kletch
Atkinson Christopher
Krayer William L.
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