US1967975A - Regenerative coke oven with vertical heating flues - Google Patents

Description

July 24, 1934. 1,967,975

REGENERATIVE COKE OVEN WITH VERTICAL HEATING FLUES J. SCHAEFER INVENTOR l I v t F rm 6 m n s b e m Ow o 3 9 l 1 l L. u d e l 1 F Jns 12R 5 cum: FER BY JQ JW ATTORNEY J. SCHAEFER July 24, 1934.

REGENERATIVE COKE OVEN WITH VERTICAL HEATING FLUES Filed Aug. 11, 1930 2 Sheets-Sheet 2 Comsu INVENTOR JDSBP SBHA'E'PBR ATTORNEY Patented July 24, I934 PATENT OFFICE REGENERATIVE COKE OVEN WITH VERTI- CAL HEATING FLUES .Josef Schaefer, Dortmund, Germany Application August 11, 1930, Serial No. 474,486 In Germany September 20, 1929 1 Claim.

The invention relates to regenerative coke ovens having vertical heating hues and lower and upper burning places therein which are alternately fed with fuel, and header passages 5 provided in the heating walls and connected to the regenerators. In the operation of regenerative coke ovens generally additional fresh air of combustion is supplied to the heating fiues at a certain distance above their floor through small passages provided in the header bricks of the heating walls. Now the invention has for its object to supply, with regenerative.-

coke ovens of the above type, fuel components preheated by regeneration to the heating flues l5 between the upper and lower burning places through header passages. To this end each two header passages which open into the heating flues at a certain distance from the upper and lower burning places, are connected to dif- 20. ferent regenerators, so that in the one direction of draft the fuel component is supplied additionally to the same flue by the one header passage and in the other direction of draft by the other header passage. This arrangement may further be modified in that these two header passages may open into the hue at different levels, so that in the one direction of draft the one header passage supplies fuel component at a different level from that at which fuel is supplied by the other header passage during the draft in the other direction. Furthermore, one of these two header passages only may open into the flue at a certain distance from the upper and lower burning places but this passage is connected alternately to two regenerators in such a manner that it additionally supplies fuel component preheated by regeneration to the same flue or flues in both directions of draft.

In order that the invention can be more readily understood, three embodiments of the same are illustrated by way of example in the drawings which accompany and form part of this specification. In the drawings Figure 1 is a fragmentary longitudinal section through a heating Wall of a combined regenerative ooke oven forming the first embodiment of the invention,

Figure 2 is a corresponding cross section through a battery of ovens,

Figure 3 is a fragmentary horizontal section through the heating fiues on line A--B of Figure 1,

Figure 4 illustrates a second embodiment of the invention by a sectional View similar to Fig- K ure 1,

Figure 5 is a corresponding cross section simi lar to Figure 2,

Figure 6 is a corresponding horizontal section similar to Figure 3, p

Figure 7 illustrates by a sectional view similar to Figure 1 a third embodiment,

Figure 8 is a corresponding cross section similar to Figure 2, and

Figures is a correspondinghorizontal section similar to Figure 3.

Inthe combined regenerative coke oven illustrated in Figures 1 to 3 header passages 2' and i3 are provided in the header bricks of the heating walls in the manner usual with coke ovens having alternately fed upper and lower burning places, which header passages when the oven is heated by strong gas supply air of combustion to the upper burning places in the one direction of draft and in the other direction they lead off the waste gases from the heating flues h. When 1 the oven is heated by weak gas, in the one direction of draft the passages 2' supply air of combustion and the passages i weak gas to the upper burning places, While in the other direction of draft all passages i and i draw off the 30 waste gases from the fiues h. This arrangement is already known.

Now according to the invention small passages 1' arebranched off from the header passages Z' on their upper portion which passages 7' 35 open into the two adjacent heating flues h. The header bricks including the passages i have further provided in them each a narrower header passage i from which small passages 51' are branched ofi which open into the two adja-bo cent heating flues below the small passages 11 issuing from the header passages 12 The passages i are connected at bottom to the air regenerators f while the passages i communicate at bottom with the air regenerators f to which are-also connected the heating fiues h at bottom. The header passages i are connected at bottom to the gas regenerators r while the heating flues h are connected at bottom to the gas regenerators r as best to be seen from Figure 2.

When heated by weal: gas this oven operates as follows.

In the one direction of draft preheated air of combustion is fed to the flues h at bottom from the regenerators f while preheated weak gas is supplied from the regenerators 1' Besides, additional preheated air of combustion enters the flues h through the branch passages 7' from the regenerator i the waste gases escape through the header passages i and i to the regenerators waste gases escape from the flues h through the regenerators r and f With strong gas heating, in the one direction of draft preheated air of combustion is fed to the flues h at bottom from the regenerators r and f and somewhat above also through the" header passages i The strong gas enters the flues it through strong gas ducts 13 while the waste gases escape through the header passages i and i to the regenerators f and r After reversal of draft the preheated air of combustion enters the flues at top from the regenerators f and r through the header passages i and i and additional air'of combustion is supplied further somewhat below through the branch passages 7' The strong gas is fed to the flues at top through ducts b while the waste gases escape at bottom to the regenerators r and f With ovens that are heated merely by strong gas, as illustrated in Figures 4 to 6, the header passages i are dispensed with, but in this case the header passages i must have branch passages 7' opening into the two neighboring heating flues h, which branch passages i are disposed between the upper and lower burningplaces at another level than the branch passages 7 Fur 'tom and somewhat above through the branch passages 7' while the waste gases escape through the header passages i to the regenerators 1'. After reversal of draft, preheated air of combustion is fed from the regenerators 'r to the -fiues h'both at top through the header passages i and somewhat below through the branches F. The waste gases escape from the flues h at bottom to the regenerators f.

a In these embodiments of the oven, and this in both combined and strong gas heated ovens, a

small portion of the waste gases can escape from the flues h through the branch passages i or 7' and with the strong gas heated oven through the passages 7' branched off in this case from W the header passages i this escapement takingplace during that direction of draft in which the regenerator connected to the header passages in question is sucking 01f waste gases. By

6 arranging the described branches of the header i,

passages at different levels relatively to one another the quantity of the waste gases thus prematurely sucked off can be reduced adequately. This drawback, although rather trifling, can however be entirely eliminated by connecting for instance the header passages 2'', see Figures 7 to 9, which in this case are advantageously united to pairs, both torthe air regenerators f and to the regenerators f and by providing throttling valves 12 and a to be oper- 35 ated alternately, in the passages that connect the regenerators to the header passages 2", by

means of which valves the latter can be shut off from that of the two regenerators f f which is just sucking off waste gases and be connected to that just feeding fresh air of combustion. In this case additional fresh air of combustion is thus permanently supplied alternately through the header passages i from one of the two regenerators f f so that the above branches issuing from the passages 2 are superfluous, as illustrated in Figure 7. As further to be seen from Figures ,7 and 8 several passages 7' can be provided superposedly. As for the rest the arrangement and mode 'of operation of this oven is the same as that of the preceding embodiment. 4 1

Furthermore, the header passages i can be connected to a special pair of regenerators that means to regenerators which alternately supply' fresh air of combustionto the header passages 2' independently upon thoseregeneratorswhioh communicate withthe passages i, which regenerator further can be heated upalternatelyby a portion of the waste gases that escape from the heating flues. I

It may still be noted that,v as a matter of course, also additional heating gas instead of air of combustion can be supplied to the heating flues in a similar manner that means through additional header passages.

I claim: 1

A regenerative coke furnace having acoking chamber and a hollow heating wall therefor, said heating wall having a plurality of transverse walls dividing the space within the heating wall into a plurality of vertical combustion flues, each of said flues having burners therein at the top and bottom thereof and means to supply gas to said burners, a plurality of air regenerators, said transverse walls having passages therein, at least two passages communi-' eating witheach combustion flue, one of the passages connected to any combustion flue communicating with said combustion flue at a point intermediate its length and spaced from the ends thereof, means to connect said firstpassage interchangeably to either of two air 'regenerators, and another of said passages independent of the first passage connected to the same combustion'fiue communicating with the flue near its top and being connected to a regenerator. e

JOSEF SCI-IAEFER.

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