US2350813A - Regenerative coke oven - Google Patents

Description

June 6, 1944. gpg-uupszu ?,3E'!0,813

REGENERATIVE COKE OVEN Filed July 3, 1941 2 Sheets-Sheet '1- 1%. -F a 2O INVENTOR I Mmmus M Pfl/L/PJE/V ATTORNEY June 6, 1944. N. M. FHILIPSEN I REGENERATIVE COKE OVEN Filed July 3. 1941 2 Sheets-Sheet 2 Patented June 6, 1944 REGENERATIVE COKE OVEN Nikola-us M. Philipsen, Tokyo, Japan; vested in the Alien Property Custodian Application July 3, 1941, Serial No. 400,988 In Japan May 2, 1940 2 Claims.

The general object of the present invention is to improve the construction of horizontal regenerative coke oven batteries having groups of vertical heating fiues each comprising a small number of flues connected at their upper ends.

For example, each such group may consist of two limbs of a twin or hairpin flue.

The invention is characterized by the association with each such small group of fines of a separate group of vertical regenerators which are located within an individual space formed in the coke oven brickwork beneath the heating Walls and coking chambers, and which comprise a m'ulti-chambered regenerator housing supported independently of the walls of said chambers by a subjacent support on which the housing may slide or rock as the battery expansion causes the upper end of the housing to move horizontally relative to said support. The regenerator housing may be thus supported on a grate-like reinforced concrete supporting deck for the coke oven brickwork or on iron base plates supported by said deck. Each regenerator housing is thus free to tilt or slide as a result of battery expansion without being subjected to lateral pressure or thrust by the portions of the coke oven brickwork forming the walls of the chamber in which the housing is received, which facilitates the maintenance of gas-tight walls between the diiferent vertical regenerator chambers or cells formed in each housing regenerator.

In a hairpin flue oven constructed in accordance with the present invention, the binder walls extending transversely to main supporting walls beneath thedifferent oven chambers, may be constructed independently of said supporting walls and each may be formed with two uprising channels for supplying rich fuel gas alternately to the two vertical fiues forming the limbs of a hairpin flue and separated by a flue division Wall directly above said transverse binder walls. Advantageously the two rich fuel gas supply channels for adjacent twin fiues have their upper ends extending into the corresponding flue division wall and terminating in burner outlets opening at opposite sides of said division wall.

In the preferred form of the present'invention a transverse individual waste heat channel is provided in the basement space of the battery beneath each heating wall, and vertically adjustable valves are provided for-connecting the lower end of each regenerator chamber associated with the heating wall alternately to the waste heat channel and to an adjacent transverse supply pipe for the combustible agent, i. e., combustion air or lean gas, preheated in that regenerator chamber. To effect the reversal of said valves they may be provided at their lower ends with pins or other cam engaging parts operatively engaging cams carried by reciprocating cam shafts located in the basement space of the battery and extending transversely of the latter,'or, in another form of the invention, each valve may be provided with individual fluid pressure operating means.

As each heating wall operates entirely independent of the other it is possible to separately reverse the direction of gas flow through the fines of the individual'heating walls and associated regenerators, and to reverse the flow through the difierent heating walls of the battery successively in the course of a half reversal period; For this purpose the "reversal mechanism for each heating wall must necessarily be so designed that its operation may be chronologically independent of the operation of the reversing mechanisms for the other heating walls.

The various features of novelty which characterize my invention are pointed out .with particularity in the claims annexed to and forming a part of this specification. For a better understanding of the invention, however, its advantages, and specific objects attained with its use, reference should be had to the accompanying drawings and descriptive matter in which I have illustrated and described preferred embodiments of the invention.

Of the drawings: 7

Fig. 1 is a vertical section through a portion of a coke oven battery taken transversely of the length thereof on the brokenlin'e ll of Fig. 2;

Fig. 2 is a vertical section withits right hand portion taken on the line 22 of Fig. 1 except for a lower left handportion taken on the line 2A2A; V

Fig. 3 is a partial section taken longitudinally of the battery on a larger scale than Fig. 2 and showing regenerator connection details not shown in Fig. 2.

The drawings illustrate the use of the invention in a horizontal underfired 'coke oven battery having twin lines in its heating walls which alternats along the length or the battery with transversely extending coking chambers I. In accordance with the present invention the coke oven masonry is of relatively strong and rigid design and is formed for themost part of bricks which may be of" ordinary rectangular brick shape. The said m'asonry comprises walls 2, one directlybeneath and'parallel to each coking 2? chamber. Each heating wall is formed with runner brick walls 3 extending longitudinally of the heating wall and forming the side walls of the heating flues, and binder brick walls 4 which are transverse to the walls'2 and separate the adjacent twin flues of the heating wall. Directly beneath each heating wall 4 is a wall 4A extending across the space between thetwo adjacent walls 2. a The walls 3 and 4 extendto and directly support the oven roof structure which is traversed by the usual inspection holes 5 and chargeach of the walls 4A. The grate like'st'ructure which is located at the ceiling of the characteristic subway space of the underfiredbattery is supported by columns 45 extending upward through the basement space and resting on the usual battery foundation, not shown.

Each adjacent pair of walls 4 and the two subjacent walls 4A and adjacent portions of the walls 2 and 3 enclose a shaft or vertically elongated space generally rectangular in cross section and'including in its upper portion a twin flue and including in its lower portion four regenerator cells, two of which are connected to the lower end of one limb and the other two of which are connected to the lower end of the second limb of the corresponding twin'flue. The four regenerator chambers in each masonry shaft are formed in a housing structure comprising three walls ||l extending longitudinally of the walls 2 and three cross walls'll. .The central cross Wall II is connected .by a centering pin part 42 to a vertical brick wall'|2 midway between the corresponding binder'brick walls 4 andseparating the two limbs of the corresponding twin flue except for a connecting port provided at the top of the wall l2. Each regenerator housing structure rests upon a corresponding cast iron base plate |3'directly engaged by the central cross wall responding regenerator or space and is removable to permit the removal and replacement of the regenerator housing. The plate I 3 also supports the weight of the stacks of checker bricks in the corresponding regenerator cells or'cham- 1' The spaces between the ribs 4 and the hous-.

ing walls l and II may-be filled with a flexible or granular packing material so that notwithstanding the relative movements ofthe individual parts, gas tight seals between the lower end of the different regenerator chambers maybe maintained. The spaces between the regenerator checkerbricks and the regenerator housing walls can likewise be filled with a suitable refor example, loose ceramic fractory material;

cement. l

Each cast iron base plate I3 is formed with an opening or port l6 directly beneath each of the regenerator cells above it, and beneath-the plate I3 is a trough shaped metallic member |8 which unites with thebase plate above it to form The plate l3 serves as a closure for the cor- In consequence the checker brick a waste heat sole channel l9. As shown, said metallic member l8 has outturned flanges I! at the upper edges of its side wall portions I1, which bear against the underside of the plate I3 and may be secured to the latter by the bolts 40 provided to detachably connect the plate |3 to the reinforced structure above it. As shown in Fig. 2, the bolts 40 are connected at their upper ends to the ends of beams or bars 4| which extend across the girder portions of the deck member. Supplemental plates welded to each member |8, unite with the latter to form a lean gas distribution channel 20 alongside one, and a combustion air distribution channel 2| alongside the other of its walls Each of said distribution channels may extend from one side of the battery to the other.

The two regenerator chambers connected at their upper ends to the same twin flue limb are separately connected at their lower ends, one to the corresponding lean gas channel and the other to the corresponding combustion air channel 2|, each through an individual valved connection. Each of said connections comprises a vertically movable tubular valve element 22 which carries a valve head 23 at its upper end. The latter in its elevated position closes communication through the port l6 between the corresponding regenerator chamber and the waste heat channel I9, and such communiation is established when the valve head is moved into its lowermost position shown in dotted lines in Fig. 3. In the last-mentioned position the tapered lower edge 25 of the lower end of the tubular member 22 engages the valve seat 24 and closes communication between the bore 26 of the tubular member and an annular space 21 formed in the valve housing member 32 in which the tubular part 22 and valve seat 24 are mounted, said annular chamber 21 being in communication with the corresponding distribution channel 20 or 2| through a pipe connection comprising pipe sections 28 and 29 and an elbow fitting 30. The central passage 26 or bore of the tubular-member 22 is in open communication with the regenerator chamber above it through openings 23a in the valve head 23.

The rate at which lean gas issuppled through each passage 25 may be regulated by the use of adjustable or replaceable throttling elements of usual or suitable form. Thus, as shown by way of example, a throttling pin 44 extending axially into the lower end of the passage 26 through the lower end of the housing 32 may be axially adjusted from the basement space of the battery to .move pin portions of different diameters into throttling relation with the passage 26.

The valve members 22 may be adjusted in one direction or the other at suitable reversal periods by suitable reversing mechanism which may be of any suitable form. As shown, each valve member 22 is provided with individual fluid reversing means comprising an external or annular piston :part 3| surrounding the body of the valve member and working in a cylinder space 33 formed in the valve housing 32. ,Pipe connections 34 and 35 connected to the upper and lower ends of the chamber 33, form means for increasing the pressure above the piston-3| to effect a down movement of the valve 22, and for increasing the pressure below the member 3| to efiect the reversal or up movement of the valve member.

Instead of heating the battery by the combustion of lean fuel gas regeneratively preheated,

all of the regenerator chambers may be used in preheating combustion air then supplied through the distribution channels 20 as well as through the distribution channels 2|, and rich fuel gas may then be supplied to the heating flues through channels 36 two of which extend upwardly through each of the walls 4a, and terminateat their upper ends in burner outlets formed in the superposed wall 4 and opening respectively, at suitable levels to the heating flues at the opposite sides of the wall 4. Rich fuel gas is supplied to one channel 36 of each pair through branches 3! from a horizontal distribution pipe 38 during periods alternating with those in which rich fuel gas is supplied to the other channel of the pairthrough the branches 3'! from a second horizontal distribution pipe 38. The pipes 38 may be associated with reversing valves, not shown, in the usual manner. The riser pipe portions of the pipe connections 31 have their upper ends embedded in the corresponding cross girders 9 and in register with the lower ends of the channels 36.

While in accordance with the provisions of the statues, I have illustrated and described the best forms of embodiment of my invention now known to me, it will be apparent to those skilled in the art that changes may be made in the form of the apparatus disclosed without departing from the spirit of my invention, as set forth in the appended claims and that in some cases certain features of my invention may be used to advantage without a corresponding use of other features.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:

1. An underfired regenerative coke oven battery comprising a brickwork mass formed in its upper portion with coking chambers and heating walls alongside said chamber and each formed with vertical heating fiues, small groups of said flues being connected together at their upper ends and said mass being formed in its lower portion with a separate regenerator space for each of said flue groups, a regenerator housing in each such space formed with vertically extending regenerator chambers connected at their upper ends to the flues of the corresponding groups, a metallic structure extending transversely of the battery beneath the lower end of the regenerator housings associated with each heating wall and supporting said housings and formed with a waste heat channel, and reversing valves mounted in said structure and controlling communication between said channel and the regenerator chambers in said housings.

2. An underfired regenerative coke oven battery comprising a brick work mass formed in its upper portion with coking chambers and heating walls alongside said chambers and each formed with heating flues, small groups of which are connected together at their upper ends, said mass being formed in its lower portion with a separate regenerator space for each of said flue groups, a regenerative housing in each such space formed with vertically extending regenerator chambers connected at their upper ends to the flues of the corresponding group, means supporting each such housing with freedom for horizontal movement of its lower end relative to its upper end, means forming a waste heat channel beneath the regenerator spaces for different flue groups of a heating wall and a vertically movable reversible valve associated with each regenerator chamber and vertically adjustable between two positions, in one of which it connects the corresponding chamber to said channel and in the second of which it connects said chamber to a means for supplying thereto, a fluid to be regeneratively preheated therein and separate fluid pressure operating means associated with '40 each of said valves.

NIKOLAUS M. PI-IILIPSEN.

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