Shaft cooler for the dry quenching of coke

Details Shaft cooler for the dry quenching of coke Shaft cooler for the dry quenching of coke

1984-03-23

1987-11-24

Davis, Jr., Albert W.

Heat exchange

Structural installation

165142, 34 20, 34168, 201 39, 202228, 432 79, 432238, C10B 3900

Patent

active

047081961

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

This invention relates to a shaft cooler for dry quenching of coke and other fuel pieces, and more particularly, to such a cooler having a vertical refractory chamber with a top conical portion formed with a central charging opening and a substantially cylindrical portion disposed below the top conical portion and having a bottom discharge opening; the interior of the cylindrical portion communicating with a number of flue-gas passages at the bottom part of a ring main which extends around the top part of the cylindrical portion.
In West German patent publication No. 1,471,598, there is disclosed a shaft cooler in which masonry material extends continuously over the entire height of the chamber. In practice, it has been found that the masonry zone in this construction below the flue-gas passages is particularly at risk and, therefore, must be regarded as a weak zone. The main risk is due to the high specific pressure loads because of the weight of the inner masonry disposed above the passages for the flue gas. Collapse of the masonry during operation of the shaft cooler is frequent in these zones which causes unwanted disturbances and downtimes. To reduce the bearing pressure on the support walls near the flue-gas passages, it has been suggested to reduce the weight of the masonry in the conical part of the shaft cooler. Efforts have also been made to divert more of the weight of the bricks in the conical portion to the outer masonry located outside the flue-gas main. However, no satisfactory improvement has yet emerged.


SUMMARY OF THE INVENTION

It is an object of the present invention to obviate the disadvantages described hereinabove.
It is another object of the invention to devise the masonry located above the passages for flue gas in a manner so as to obviate the difficulties associated in the zones of flue-gas passageways of known shaft coolers which arise particularly due to excessive pressures.
It is a further object of the present invention to provide a shaft cooler for coke wherein a coke charge is acted upon to prevent a considerably larger exposed surface before the flue-gas passages as compared with the known constructions of shaft coolers for the purpose of decreasing the velocity of the cooling gas which is delivered by the flue-gas passages and, therefore, provide a decrease to the discharge of coke dust.
More particularly, according to the present invention, there is provided a shaft cooler for dry quenching of coke wherein the cooler includes the combination of a vertical refractory chamber extending along a central vertical axis with a conical top portion having a central coke charging opening and a substantially cylindrical portion below the top portion having a bottom coke discharge opening, a masonry ring suspended by tubular stays against a bottom edge of the top portion of the cooler to extend around a top part of the cylindrical portion, the tubular stays being guided at their upper ends by the top portion and extending parallel to the central vertical axis at an equidistant spacing from one another about the periphery of the masonry ring, retaining means secured to the tubular stays for support on the top edge of the cylindrical portion, and refractory support webs spaced equidistantly from one another and extending radially between the bottom portion of the masonry ring and the cylindrical portion to form flue-gas passages extending upwardly therebetween for conducting the flue-gas.
This construction of the shaft cooler provides substantial advantages, a first of which is that the conventional support or bearing walls which are disposed between the passages for flue-gas and which are very prone to disturbances because of heavy pressure on them can be omitted and replaced by merely providing radial bearing or support webs by which the masonry ring bears on the inside wall of the outer masonry. The radial bearing or support webs do not receive forces arising from the weight of the masonry ring. A further advantage is that the masonry ring, an independ

REFERENCES:
patent: 566106 (1896-08-01), Wingard
patent: 2100758 (1937-11-01), Ackeren
patent: 3088722 (1963-05-01), Slesaczek
patent: 4315620 (1982-02-01), Megerle et al.
patent: 4342626 (1982-08-01), Jakobi et al.
patent: 4370202 (1983-01-01), Weber et al.
patent: 4398999 (1983-08-01), van Laar et al.
patent: 4437936 (1984-03-01), Jung
patent: 4438571 (1984-03-01), Jakobi

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