US2043945A - Underfired coke oven - Google Patents

Description

June 9, 1936. w, BEMANN 2,043,945

UNDERFIRED COKE OVEN Filed Feb. 25, 1955 #n E ,f 9

Patented June 9, 1936 UNDERFmED coKEovEN Wilhelm Beimann, Bochum, Germany Application February 25, 1933, seriaiNo. 658,530

In Germany February 25, 1932 l claims. (CL 20a- 141)` i e 'Ihe invention relates to underfired coke ovens having horizontal coking chambers and regenerators situated below the chambers, the heating walls of said chambers being subdivided so 5 as to form hair pin flues. By the term underfired coke ovens as used herein, I mean to include and designate a coke oven of the .type which has vertical combustion ilues and in which fuel gas is supplied to the combustion ilues of the oven through supply passages vertically dis" posed in the portion of the oven structure beneath the ilues and through conduit connections to said passages beneath said structure portion.

It is already known, in order to prolong the `1|; strong gas flame, to supply combustion gases to the heating ilues, either part of the combustion gases that stream from a downwardly burning flue to the regenerators, being fed to an upwardly burning nue (the so-called cycle current 20 system) or part ofthe waste gases that already have been cooled down in the regenerators to 200 to 300 centrigrade, being pressed by means of a gas pump to pre-heating regenerators through which the waste gases pass on the same g5 way as the ccmbustionair to be pre-heated in the regenerators, or the low grade gas.

Now the invention has for its object to improve the method of supplying combustion gases to the heating ilues, which object is attained by al- 30 ready cooled combustion gases being supplied to the heating iiues through verticalchann'els extending within the partitions of the regenerators and disposed in a line with the strong gas feeding channels. The horizontalgcross section 36 of these channels preferably has the shape of a' rectangle the longer sides of which extend in the longitudinal direction of the'wall. This cross sectional shape affords a large surface for the exchange of heat between thevchannels and 40 the adjacent regenerator chambers.

Furthermore, in coke ovens fitted with hair pin ilues oppitely charged regenerators usually are arranged on both sides of the partitions that contain the channels. Leakages occurring 45 in these walls therefore cause transition of the agents to be pre-heated to the waste heat regenerators. `Now the above described combustion gas feeding channels can serve to remedy this drawback, by a thinly liquid mortar being 50 introduced, during the operation of the oven,

by which the Joints of the regenerator partitions are re-tightened, so that any transition of gases is prevented.

In order that the invention may be clearly 55 understood and readily carried into effect, an

embodiment of the same'is illustrated by way of example inthe accompanyingdrawing in which n the lower portion of an underred coke oven designed in accordance with the invention is illustlated. I y 5 Figure 1 is a vertical longitudinal section of the heating wallv and the regenerator partition, l y e Figure 2 is a horizontal section onthe floor of the heating fiues, on line II-II of Figure 1, 10 and Figure 3 is a vertical section in the longitudinal direction of the battery, on line III-III of Figure 1.

a, a denote the coking chambers on both sides of which are arranged heating walls that are subdivided so as to form hair pin'flues b, b1. Strong gas can be supplied to these flues through channels c which alternatively are'connected to the strong gas distributing mains d, d. e and f denote regenerators which, if the oven is heated by low grade gas, alternatively serve to feed air and low grade gas and to store up the' heatof the combustion gases. If strong gas is used, the

` regenerators e, f in the pre-heating period serve to supply air. Part of the waste gases that have been cooled down in the regenerators is pressed by means of a suitable pump (not shown) to a collecting pipe g to which are connected vertical channels h that open into the heating iiues b, b1. The cross section of the channels h proper, that is of the middle portion thereof, has a rectangular cross section, with the longer sides extending in the longitudinal direction of the wall. The exitsof, the channels are situated between the strong gas burners and the outlets for air and, respectively, air and low grade gas, see Figure 2. Consequently, the pre-heated waste gases are mixed in part with the strong gas, previous to the latter combining with the oxygenv of the air; hence the combustion is retarded.

I claim: 1. In a coke oven, the combination with a series of alternating coking chambers and heating walls therefor arranged side by side in a row, vertical heating ilues in and distributed longitudinally of each heating wall, regenerator division walls one beneath and parallel to each heating wall, regenerators between each two adjacent division Walls, a regenerator connection communicably connecting the lower end of each flue and a regenerator, some of the flues in each heating wall being so communicably connected to a regenerator at one side, and the remaining ilues in said wall being so communicably connected to a regenerator at the other side of the subiacent division wall, and the ilues in said heating wall being communicably connected at their upper ends for flow between the said regenerators at opposite sides of said subjacent division walls through said flues and the regenerator connections to their lower ends, means for supplying fuel gas to the lower end of each flue, and means for supplying combustion gases to the lower end of each flue comprising a supply channel extending upwardly through the subjacent division wall into communication with the flue.

2. A combination as specified in claim 1, in which each combustion gases supply channel'is horizontally elongated in'cross section in the direction of the length of the division wall through which it extends to thereby augment heat absorption by the gas flowing through said channel from the regenerators adjacent said wall.

3. A combination as specified in claim l, in which the means for supplying fuel gas to the lower end of each heating wall flue also comprises a supply channel, circular cross sections extending upwardly through the subjacent division wall and communicating at its upper end with said flue, in which each combustion gases supply channel is horizontally elongated in cross section in the direction of the length of the division wall through which it extends, and in which the various combustion gases supply channels for the nues in each heating wall are arranged in alternate relation along the length of the subjacent division wall with the various fuel gas supply channels for the flues in said heating wall.

4. A combination as specified in claim 1, in which the fuel gas supply means for each flue includes a channel opening into the lower portion of the flue, and in which the combustion gases supply channel for the flue opens to a portion of the latter which is horizontally intermediate the portions of said flue at which said fuel gas supply channel and the regenerator connection to said flue open to the latter, whereby combustion gases supplied to the flue may retard combination in combustion of fuel gas and air simultaneously supplied to the ue through said fuel gas supply channel and regenerator connection.

5. A combination as specified in claim l, in which the regenerator connections to each pair of adjacent ues in each heating wall connect one flue of said pair to one, and the other ue of the rpair to the other of two different regen- 25 erators, whereby the direction of flow at any one time may be upwardly in one and downwardly in the other of the flues of said pair.

W. BEIMANN.

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