US3196086A

US3196086A - Bus flue structure of coke oven battery

Info

Publication number: US3196086A
Application number: US221849A
Authority: US
Inventors: Wethly Frans
Original assignee: Allied Chemical Corp
Current assignee: Krupp Wilputte Corp; Allied Corp
Priority date: 1962-09-06
Filing date: 1962-09-06
Publication date: 1965-07-20
Anticipated expiration: 1982-07-20

Description

July 20, 1965 F. WETHLY 3,

BUS FLUE STRUCTURE OF COKE OVEN BATTERY Filed Sept. 6, 1962 4 Sheets-Sheet l FIG INVENTOR. FRAWS WE TH Y ATTORNEY July 20, 1965 F. WETHLY 3,196,086

BUS FLUE' STRUCTURE F COKE OVEN BATTERY Filed Sept. 6, 1962 4 Sheets-Sheet 5 2 13 F/G.4/ f

a.- 62' Q 6 ,T 72

Has

INVENTOR.

FRHNS WE THLY HTTOR/VEY July 20, 1965 w L BUS FLUE STRUCTURE OF COKE OVEN BATTERY Filed Sept. 6, 1962 4 Sheets-Sheet '4 INVENTOR.

' FHA/V5 WE THL Y BY 2 47' TORNE Y mm mm \m wm United States Patent 3,136,686 BUS BLUE STRUQTURE GE CGKE OVEN BATTERY Frans Wethiy, Manhassct, N.Y., assignor to Allied (Ihemical Corporation, New York, N.Y., a corporation of New York Filed Sept. 6, 1962, See. N 221,849 4 Claims. (Cl. 292-142) This invention relates to regenerative coke oven batteries and more particularly to the structure of the bus dues and ports connecting the bus flues with the regenerators.

Regenerative coke oven batteries are known having crosswise extending regenerators, i.e., regenerators extending across the width of the battery, with built-in ports connecting the bus flues at the base of the regenerators with the regenerators to regulate the flow of air preheated in the air-inflow regenerators thereinto and the outflow of products of combustion into the bus flues which communicate with the chimney flue or lines.

Heretofore known constructions of such bus fl e ports are ineffective to control oven heatiru under conditions of slowdown or standby conditions, which arise from time to time for economic reasons or because of strikes or for other reasons. When it becomes necessary to operate a coke oven battery under slowdown conditions, with consequent longer coking times, the flow of air, particularly to the interior zones of the inflow regenerators, and the outflow of combustion products from the interior zones of the regenerators, must be restricted. This cannot be done readily or conveniently, as a practical matter, with heretofore known constructions of bus flue ports.

The problem of controlling flow into and from the interior zones of the regenerators, bearing in mind that a battery may be 30 to 40 feet wide or wider, also arises when a battery is operated under standby conditions, burning a controlled limited amount of gas in the dues to keep the battery hot and at such temperature that the refractory brickwork will not develop cracks. Gas may be burned only in the heating flues at the coke and pusher sides or" the battery to take into account heat losses at the sides because of exposure to the atmosphere, and maintain the battery at or above the critical temperature of the refractory brickwork, below which marked contraction of the refractory brickwork takes place that, if permitted to occur, could cause excessive crack formation. This requires the substantially complete interruption of the supply of air to interior zones of the inflow regenerators while supplying air to the zones of the air-inflow regenerators adjacent to the sides of the battery and the control of the flow of products of combustion so that most of the combustion products pass through the aforesaid zones of the outflow regenerators adjacent to the sides of the battery. Heretofore known constructions of bus flue ports do not readily or conveniently admit of the necessary adjustment of the interior bus flue ports to obtain such flow into and from the regenerators.

It is a principal object of the present invention to provide a regenerative coke oven battery having crosswise extending regenerators provided with bus flues in the base thereof through which air is supplied to the air-inflow regenerators and products of combustion discharged from the outflow regenerators, which bus flues communicate with the regenerators through orifices, the size of which can readily be controlled from the sides of the battery to give desired rates of flow throughout the width of the battery at all times during operation thereof, including operation during slowdown or standby conditions, should this become necessary.

Other objects and advantages of this invention will be 'ice apparent from the following detailed description of the invention in connection with the illustrated embodiments thereof. The invention, however, is not limited to these illustrated embodiments, but is applicable to all coke oven batteries having crosswise extending regenerators, including such rcgenerators having partitions or division walls separating them into compartments or sections, one in back of the next in alignment in a direction across the width of the battery, and the regenerator arrangement in so called two-divided ovens in which all of the cross wi e extending regenerators on one side of the battery operate for inflow while those on the opposite side operate for outflow, and vice versa.

In the attached drawings forming a part of this specification and showing for purposes of exemplification of preferred embodiments of the invention, but without limiting the invention to these embodiments:

FIGURE 1 is a composite vertical section taken crosswise to the battery, the left hand portion being taken through a heating wall, and the right hand portion being taken through a coking chamber and regenerator cham ber of an under jet coke oven battery embodying the present invention;

FIGURE 2 is a vertical section through a gas gun twin flue regenerative coke oven battery taken lengthwise of the battery;

FIGURE 3 is a fragmentary vertical section through an end of a regenerator and the communicating bus flue;

FIGURE 4 is a fragmentary plan view of a regulating structure for controlling the size of the orifice openings providing communication between the bus flue and the regenerator thereabove;

FZGURE 5 is a fragmentary vertical selection through a regenerat-or and bus flue therebeneath showing the location of the regulating structure;

FIGURE 6 is a fragmentary vertical section through the regulating structure taken in a plane passing through line 6-6 on FIGURE 4;

FIGURE 7 is a fragmentary section taken in a plane passing through line 77 on FIGURE 4;

FIGURE 8 is a fragmentary horizontal section and plan view showing the structure at the longitudinal median of the battery, i.e., half way across the width of the battery where the regulating structures for each row of crosswise extending regenerators abut; these structures extend inwardly from the opposite sides of the battery toward each other, with their longitudinal axes aligned;

FIGURE 9 is a fragmentary plan view of the preferred form of moveable orifice plate;

FIGURE 10 is a vertical section through the center line of the plate of FIGURE 9;

FIGURE 11 is a vertical section through an assembly of stationary and movea-ble orifice plates employing the modification of FIGURE 9; and

FIGURE 12 is a plan view of the regulating structure of FIGURE 11.

Referring to FIGURE 1 of the drawings, the coke oven battery structure illustrated is of the underjet hairpin flue type and comprises a foundation'll) which extends the fuil length and width of the battery. Resting on this foundation are the pillars 11 which support the mat 12 defining the upper surface of the basement space 13. The battery proper rests on mat 12 and is built from refractory brickwork to contain a series of crosswise or transversely extending high coking chambers 14, say from 14 to 20 feet high, with heating walls alternating with the coking chambers. The heating walls each contain a plurality of hairpin flues each constituted of two

branches

16 and 17 interconnected at their tops as at 18.

In the lower portion of this oven battery structure, as best shown in FIGURES 1, 2 and 5, are transversely or a crosswise extending regenerators 21 beneath the coking chambers 14 thereabove.

The crosswise extending regenerators 21 are connected to the heating flues by ducts 22. They can be of any known type of crosswise extending regenerators employed in coke oven batteries. In the case of twin flue ovens, they can be arranged in pairs along the length of the battery with each pair serving the inflow heating lines on the opposite sides of a coking chamber therea-bove and the next pair the outflow lines, and so on for the length of the battery, as shown in FIGURE 2 and disclosed, for example, in my co-pending patent application Serial No. 141,197, filed September 27, 1961. In the case of other types of coke oven batteries, such as the well known Wilputte two-divided oven or four-divided coke oven battery, the regenerators are arranged so that longitudinally of the battery all the regenerators in a row are in the same phase and crosswise of the battery an air-inflow regenerator is positioned adjacent to an outflow regenerator. Since such regenerator constructions are well known, further description thereof is believed unnecessary.

In the battery shown in FEGURE 1, each crosswise extending regenerator 21 is divided into a plurality of side by side compartments 23, with one such compartment for each inflow flue of a heating wall above. As indicated, this invention is not limited to such compartmentation of the regenerators; compartment-s dimensioned to communicate with more than one flue can be used, it

desired. Each compartment supplies-preheated air to support combustion or receives products of combustion from a flue or flues of a heating wall above, in the case of an oven battery, in which rich gas not requiring preheating, is burned to heat the battery. For the well known combination ovens employing lean gas, such as blast furnace gas, which requires preheating, as conventional, crosswise extending regenerators may be arranged along the length of the battery for preheating both the air and lean gas fed to the inflow heating fines and for outflow of products of combustion from the outflow heating flues, with periodic reversal of flow of the respective media through the inflow and outflow regenerators.

Each regenerator 21 has at its base a bus flue 24 which communicates with an air inlet port 25 at one side of the battery, flow through which is controlled by a valve 26 actuated by conventional reversing mechanism so that alternate valves 26 along the length of the battery controlling flow to the air inflow regenerators are all open while the valves controlling air flow to the products of combustion outflow regenerators are closed. Upon reversal, which may take place as often as every minutes to speed up the coking cycle, the air ports which were previously open are closed and those which had been closed are opened.

Each bus flue 24, at the opposite side of the battery communicates with a chimney flue 27 through a connecting duct 28, flow through which is controlled by a valve 29 actuated by conventional reversing mechanism so that these valves 29 controlling flow from the outflow regenerators are open while the valves 29 controlling flow 'to the air inflow regenerators are closed, interrupting communication between the remaining regenerators and the chimney flue 27. Upon reversal, valves 29 which had previously been open are closed and those which had previously been closed are opened.

Each coking chamber of the oven battery, as conventional, ispro-vided with charging holes 31 in its top and a gas otftake 32 communicating with a collector main 33 through the uptake 34, flow through which is controlled by valve 35. A gas main 37 supplies heating gas to the headers 33 communicating with the valve controlled lines 39 supplying the heating gas tothe burners 41 in theheating flues. The valves controlling fl w of the heating gas are located in the basement space 13 Where they can readily be adjusted. 42 is a decarbonizing air main to supply decarbonizing air to burn out carbon deposits in the burners during the operating periods when fuel gas is not supplied to the burners, in accordance with conventional operating techniques. While the above description refers particularly to an underiet oven having a single chimney flue 27, it will be understood the present invention is not limited thereto, but is applicable to gas gun ovens such as shown in FEGURE 2 in which the gas conduits 39' are built into the battery, as conventional, and communicate with the burners 41, to such ovens having chimney flues at both sides of the battery, and to all coke oven batteries having crosswise extending regenerators to regulate flow between the bus flue and the regenerato-rs in both directions from the bus flue through the ports into the regenerators and products of combustion outflow from the regenerators through the ports into the bus flue to give optimum rates of flow under widely varying conditions of operation of the battery as may be required when it is necessary to change the operation of the battery from standard conditions to standby conditions or under slowdown condiions involving a substantial decrease in the coking time, say from about 16 hours to a week.

Operating under standby conditions, general practice is to burn gas in th heating flues at the coke and pusher sides of each heating wall only. This requires that the ports or orifices connecting the bus flue with the regenerator compartments or portions of an on-compartmented regenerator communicating with the interior heating flues be closed or nearly closed so that little or no air is admitted to these interior heating flues. When operating under slowdown conditions with greatly reduced volume of heating gas fed to the interior heating flues, a corresponding smaller volume of lair'must be admitted to these interlor heating flues. The outflow of products of combustion should also be controlled to effect distribution of heating of the regenerator portions to effect maximum heating of those portions or compartments which comunicate with the coke and pusher side heating flues of each heating wall. The present invention provides an efficient, simple construction which permits ready adjustment of the size of the orifice openings connecting the bus flues with their regenerators to eifect the desired control of flow into and out of each regenerator.

Referring to FIGURES 3 to 8 of the drawings and particularly to FIGURE 5, each bus flue 24 has the brickwork defining the upper portion thereof arranged to provide a supporting ledge 51 extending on opposite sides of the top of the bus flues for the full length thereof. The ledges 51 define sides of opening 52 running the length of the bus flue. As shown in FIGURE 8, the battery has brickwork obstructions or stops 53 along its longitudinal median in the area of bus flues 24, that extend from opposite sides of the battery toward its median. These stops 53 extend toward each other along the longitudinal median of the battery across the top of each bus flue 24. Stops or Walls 53 can extend the full height of the bus flues and project thcreabove in the plane of stationary or fixed

orifice plates

54, 54 resting on ledges 51. These stationary plates are fixed to ledges 51 in any suitable manner, as for example by being dimensioned so that, once positioned, they are incapable of appreciable movement.

In the embodiment shown in the drawings, orifice plate 54 extends from the right hand side of the battery toward the longitudinal median of the battery where is terminates in a reduced end portion 55 providing shoulders 56 posiwould otherwise be required. A single long plate, however, can be used if desired.

Each

stationary plate

54 and 54, desirably, is composed of a plurality of sections S joined end to end. Each section has a row of closely spaced openings 57, each of a cross-sectional extent designed to give optimum flow characteristics where located when fully open. Circular openings are preferred but the invention is not limited to any particular shape of openings. These openings are arranged in a row with their centers on the longitudinal median line of the orifice plate. While the'number of such orifice openings and their spacing can be varied as desired for optimum results, in general, openings having a diameter of about Vs to 1 inch spaced from the center of one to the center of the next approximately 2% inches gives good results.

Cooperating with each orifice plate 54 and 54' is a sllding orifice plate 58 and 53', respectively. Each sliding plate is narrower than the fixed plate on which it rests and is composed of sections 61 joined end to end. Each of the sections has along its longitudinal median a plurality of closly spaced openings 59 which, in the case of the interior sections, are equal in number to the number of openings 57 in the fixed plate therebelow. Desirably, and as shown in FIGURE 12 and described more fully hereinafter, the end sections of the orifice plates at the coke and pusher side of the battery have an elongated opening in the area overlying the end orifice openings in the stationary plate large enough to leave unchanged the end orifice openings when the position of the moveable orifice plate is adjusted. These end orifice openings control fiow through the portions or" the regenerators communicating with the heating fines on the coke and pusher sides of the battery which do not require adjustment when changing from normal operation to operations under standby or slowdown conditions.

The cross-sectional area of an opening 59 is larger than the cross-sectional area of the cooperating opening 57 in the fixed orifice plate, i.e., in the case of circular openings the diameter of 59 is larger than that or 57. Openings 59 have a diameter of about 1% inches, and are spaced from center to center a distance of 2% inches. The spacing between the openings 59 is such as to provide a solid wall 6 8 on the opposite sides of each opening 59; depending on the extent of limited movement of upper slidable plate 53 or 58', the size of each opening 57 can be controlled from fully open to partially or fully closed, as desired to obtain optimum flow characteristics. Furthermore, such control can be efiected with only small or limited movement of a sliding plate. The sliding plate need be moved from the position shovm in FIGURE 6, the fully open position of the orifices, a distance less than the diameter of an opening 59 to eiiect the desired maximum reduction in flow to the interior portions of the regenerators. Thus, maximum movement, in the embodiment hereinabove described, is only about 1 inch.

Desirably, each section 61 and each section S of the stationary orifice plates 5 is coextensive in length with the distance a compartment 23 of a :regenerator occupies along the length of a crosswise extending regenerator. Each section 61 desirably is provided with about 12 openings 59 of appropriate size as disclosed above.

Contiguous sections 61 are joined as shown in FIG- URES 4 and 6. A right-hand section 61 viewing FIG- URE 4 has secured thereto, as by spot welding, the end 62 of a T member 63. The leg of this T member passes between the upstanding guide members 64;, secured, as by spot welding, to the left-hand section 61 viewing FIG- URE 4. The head d5 of the T member is arranged to engage these upstanding members 64 when the right-hand section 61 shown in FIGURE 4 is moved in a. righthand direction. Such movement effects movement of the left-hand adjoining section due to engagement between the head 65 of the T member 63 with the upstanding members 64. Sliding movement in the opposite direction effects corresponding movement of an adjoining lefthand section 61 due to the leading edge of the righthand section engaging the adjoining edge of the left-hand section 61.

To enable movement of the sliding orifice plate 58 and 53' to be effected readily, the end section adjacent to the side of the battery of plate 58 at the pusher side is disposed in a chamber 66 positioned just above the upper end of the bus flue and extending to the pusher side of the battery. The end section of plate 58' at the coke side of the battery is positioned in a similar chamher on the coke side. There is one such chamber for each plate 58 and 53 respectively. Each of these cham bers at the side of the battery is closed by a door or other closure 67 which can be removed to give access to the upstanding lip or handle 68 on the end section 61. A suitable tool can be inserted in chamber 66 to engage lip or handle 68 to effect the desired adjustment.

Each sliding orifice plate 58 and 58' i maintained centered relative to the stationary orifice plate 54 and 54', respectively, with their longitudinal axis coincident during relative movement by guides 70 secured to each fixed plate 54, S4 at opposite sides of the narrower cooperating slidable plate 58, 53. Thus, as shown in FIGURES 4, 6 and 7, each guide 70, positioned at the joint between contiguous sections 61, comprises an overhanging guide plate 69 spaced from the stationary plate 54, 54' by an intervening plate 71, the side edge of which abut the side edges of the slidable plates and thus maintain the latter centered relative to the stationary plate. The assembly of guide plate 69 and intervening plate 71 for each pair of contiguous sections 61, is secured as by spot welding to the left-hand section S, viewing FIGURE 4, and pinned to the right-hand section S by a rivet or pin 72. One such assembly is positioned at the opposite sides of each pair of adjoining sections 61 of the slidable plate.

Movement of the ends of each of the innermost sections 61 of the sliding orifice plates 58 and 58' at the longitudinal median of the battery is guided by the guides 82 comprising an overhanging guide plate 83 spaced from the stationary plate 54, 54' by an intervening plate 84. The

plates

83 and 84 are secured as by spot welding to the ends of sections 54, 54'. The inner ends of these guides 82 and the inner ends of the stationary plates 54- and 54- abut along the line 85 which is substantially coincident with the longitudinal median of the battery. The sliding plates 58 and 58' terminate respectively in end edges 86 and 87 which, as shown in FIGURE 8, are separated by the space 88. This space is sufiicient to permit the necessary limited sliding movement of slid

able plates

58 or 58 or both, to effect the desired adjustment of orifice openings 5'1.

In the preferred embodiment of FIGURES 9 to 12, the moveable orifice plates are composed of sections constituted of an end section 9% having a lip or handle 68' joined to a section 91 which in turn is joined to an adjacent section 91. The joint between adjacent sections is affected by spot welding or otherwise suitably securing a plate or joining member 92, so that the underside of the marginal ends of plate 92 are secured to the adjacent spaced ends 93 and 94 of adjoining sections, as shown in FIGURE 10.

Section 99 has .an elongated opening Q5 which in the embodiment shown in the drawings has a length of about 30 inches so that in all positions of adjustment of the slidable orifice plate-s, opening $5 does not restrict flow through the two orifice openings at each of the ends of the stationary orifice plate adjacent the coke side and pusher side of the battery. It also has a flow control opening 95' at the right-hand end viewing FIGURES 9 and 10. Plate 92 ha a hole or slot 96 which is elongated in the direction of the length of the moveable orifice plate. Plate 92 has adjacent to slot 96 a flow control opening 97. Each of the sections 91 has a plurality of spaced flow control or orifice regulating openings 93, desirably of a diameter of about l /s inches and spaced as shown in FIGURES 9iand 10.

The stationary or fixed orifice plate, shown in FIG- URE 11, is made by joining sections 101 by top and bottom securing plates 1132 and 193 which are spot welded at 1%- to the right-hand section 101, viewing FIGURE The plates 1132 and 1413 have openings 1% aligned with an opening 165 in the end of left-hand section 11 11, viewing FIGURE 11. A rivet 1% having a head 107 dimensioned so that it cannot pass through the elongated opening 96 passes through opening 96 and aligned openings 104' and 195. The shank of rivet 166 is dimensioned to pass through opening 96 with small clearance at the sides of elongated slot 96 in the direction of its length, thus maintaining the moveable orifice plates centered relative to the stationary orifice plate du'ing movement thereof in a direction crosswise of the battery, The fixed orifice plate thus produced from a plurality of sections 191, has a plurality of openings 11% desirably of a diameter of about 1 inch and spaced apart from center to center the same distance as between the corresponding regulating openings in the moveable orifice plate, except for the openings in each end section, underlying end section 90. The end sections of the fixed orifice plate at the opposite sides of the battery have the openings therein dimensioned and spaced to give the desired fiow characteristicthrough the portions of regenerators at the coke and pusher side of the battery.

As' shown in FIGURE 11, the joining plates 192 of each pair of stationary sections are positioned in the space between corresponding adjacent sections of the moveable orifice plate, which adjacent sections are bridged by joining member 92.

With the parts positioned as shown in FIGURE 11 so that the openings 110 in the stationary plate are fully open, i.e., with the centers of openings 11% and 98 aligned, rivet 111 5 is positioned at the extreme left-hand end of elongated slot 96 and a clearance space 111 is formed between the right-hand end of joining plate 1% and the left-hand end 112 of section $1 shown in FIGURE 11. This space 111 and the elongated slot as are dimensioned to permit the necessary movement of the moveable orifice plate to effect the desired regulation of the interior orifice openings. The walls defining the ends of slot 95 and the end walls defining space 111 thus limit the extent of sliding movement of the moveable orifice plate. With the construction shown in FIGURES 9 to 11, involving orifice openings in the stationary plate having a diameter of about 1 inch and openings in the moveable plate having a diameter of about 1 /8 inch, arranged as shown in the drawings, a maximum movement of 4 inch is adequate to give the desired regulation for standby service and even less movement is necessary to obtain the desired regulation for slowdown conditions of operation.

While a preferred embodiment of this invention has been shown and described, it will be apparent to those skilled in the art that changes may be made therein without departing from the scope of the invention. Accordingly, all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrated and not in a limiting sense.

What is claimed is: t

1. In a regenerative coke oven battery having alternate heating walls having heating flues therein and coking chambers with crosswise extending regenerators be: neath the coking chambers and communicating with the heating flues, at least one chimney flue, a bus flue in the base portionof each crosswise extending regenerator communicably connecting said regenerator with the chimney flue for outflow of products ofcombustion from said regen'erator to the chimney fiue, and means for supplying air to the bus flu es in the crosswise extending regen erators serving for inflow of air, each of said bus fines extending along substantially the full length'of its regenerator to one side of the battery, the improvement com prising stationary orifice plate means located at the top of each bus flue extending substantially the full length thereof and having a row of closely spaced orifice openings extending in substantially longitudinal alignment along the length of said stationary orifice plate means, slidable orifice plate means in superimposed relation with said stationary orifice plate means in each bus fine, said slidable orifice plate means having an elongated orifice opening at each of the end portions thereof positioned in th portions of the regenerators located adjacent the sides of the battery, which elongated openings in all positions of adjustment of the slidable orifice plate means relative to the stationary orifice plate means is positioned in superimposed relation with respect to a plurality of orifice plate openings at each of the end portions of said stationary orifice plate means so as not to restrict flow through the said orifice openings at the said end portions of said stationary orifice plate means, the said slidable orifice plate-means having intermediate portion thereof between said end portions provided with a row of closely spaced orifice openings extending in substantially longitudinal alignment along the length of said intermediate portion, with the respective orifice openings in the said intermediate portion of the slidable orifice plate means positioned relative to the orifice openings in the intermediate portion of the stationary orifice plate means to form aligned pairs of openings in the intermediate portions of both the stationary and slidable orifice plate means through which flow takes place, the orifice openings in the intermediate portion of said slidable orifice plate means having a cross-sectional area larger than the paired orifice openings in the intermediate portion of the stationary orifice plate means, and slidable orifice plate means having one end thereof positioned adjacent to one side of the battery so that it is accessible from that side of the battery for effecting sliding movement of the slidable orifice plate means relative to the stationary orifice plate means to adjust the size of the interior pairs of aligned openings in said intermediate portions of both of said orifice plate means from the full size of the orifice openings in the intermediate portion of the stationary orifice plate means to any desired reduction in size from said full size.

2. In a regenerative coke oven battery as defined in claim 1 in which the said stationary orifice plate means is constituted of sections joined together in end to end relation and the said slidable orifice plate means is constituted of sections joined together in end to end relation, with the end sections adjacent the sides of the battery having side elongated orifice openings therein.

3. In a regenerative coke oven battery as defined in claim 1, and in which each crosswise extending regenerator is divided into compartments, one in back of another, the improvement which comprises having each slidable orifice plate composed of sections in end to end relation, each section being of substantially the same length as the crosswise distance of the battery occupied by the compartment of the regenerator in which the section is disposed, the end sections each having therein the said elongated orifice opening.

4. In a regenerative coke oven battery having alternate heating walls having heating fines therein and coking chambers with crosswise extending regenerators bee neath the coking chambers and communicating with the heating fines, the said crosswise extending regenerators comprising regenerators extending from one side of the battery toward the longitudinal median of the battery and other regenerators extending from the opposite side of the battery toward the longitudinal median of the battery, each of said regenerators having a bus flue therein extending substantially the full length of the regenerator to one side of the battery, means for supplying air to the bus lines in the crosswise extending regenerators serving for the inflow of air, the improvement which comprises,

arse-,ose

a stationary orifice plate for each bus flue located at the top thereof extending substantially the full length thereof, said stationary orifice plate having a row of closely spaced orifice openings extending in substantially longitudinal alignment along the length of said orifice plate, a slidable orifice plate for each stationary orifice plate, said slidable orifice plate having an elongated orifice open ing at the end portion thereof positioned in the portion of the regenerator located adjacent the side of the battery, which elongated opening in all positions of adjustment or" the slidable orifice plate relative to the stationary orifice plate is positioned in superimposed relation with respect to a plurality of orifice plate openings at the end portion of said stationary orifice plate so as not to restrict flow through the said orifice openings at the said end portion of said stationary orifice plate, the said slidable orifice plate also having a row of closely spaced orifice openings extending in substantially longi tndinal alignment, with the respective orifice openings in the said row in the slidable orifice piate positioned relative to the orifice openings in the stationary orifice plate to form aligned pairs of openings through which flow takes place between the bus fine and the regenerator thereabove, the said aligned pairs of openings having the orifice openings in the slidable orifice plate of a crosssectional area larger than the paired orifice openings in the stationary orifice plate, said slidable orifice plate havi0 ing one end thereof positioned adjacent to the side of the battery so that it is accessible from that side of the battery for effecting sliding movement of the slidabie orifice plate relative to the stationary orifice plate to adjust the size of the said aligned pairs of openings from the full size of the orifice openings of said aligned pairs in the stationary orifice plate to any desired reduction in size from said full size and thus control the flow of air from said hue flue into the regenerator thereabove while said regenerator operates for inflow, and the outflow of products of combustion from said regenerator to the bus flue While said regenerator operates for outfiow.

MORRIS O. WOLK, Primary Examiner. DGNALL H. SYLVESTER, Examiner.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent NO. 3,196,086 July 20, 1965 Frans Wethly It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 2, line 33, for "selection" read section column 4, lines 21 and 22, for "condiions" read conditions line 25, for "th" read the same column 4, line 28, for "an on-compartmented" read a non-compartmented column 8, line 34, for "and" read said line 51, for "side" read said same column 8, line 75, strike out "the", first occurrence; column 10, line 9, for "bue" read bus Signed and sealed this 15th day of February 1966.

( L) Attest:

ERNEST w. SWIDER EDWARD J. BRENNER Attesting Offioer Commissioner of Patents

Claims

1. IN A REGENERATIVE COKE OVEN BATTERY HAVING ALTERNATE HEATING WALLS HAVING HEATING FLUES THEREIN ND COKING CHAMBERS WITH CROSSWISE EXTENDING REGENERATORS BENEATH THE COKING CHAMBERS AND COMMUNICATING WITH THE HEATING FLUES, AT LEAST ONE CHIMNEY FLUE, A BUS FLUE IN THE BASE PORTION OF EACH CROSSWISE EXTENDING REGENERATOR COMMUNICABLY CONNECTING SAID REGENERATOR WITH THE CHIMNEY FLUE FOR OUTFLOW OF PRODUCTS OF COMUBSTION FROM SAID REGENERATOR TO THE CHIMNEY FLUE, AND MEANS FOR SUPPLYING AIR TO THE BUS FLUES IN THE CROSSWISE EXTENDING REGENERATORS SERVING FOR INFLOW OF AIR, EACH OF SAID BUS FLUES EXTENDING ALONG SUBSTANTIALLY THE FULL LENGTH OF ITS REGENERATOR TO ONE SIDE OF THE BATTERY, THE IMPROVEMENT COMPRISING STATIONARY ORIFICE PLATE MEANS LOCATED AT THE TOP OF EACH BUS FLUE EXTENDING SUBSTANTIALLY THE FULL LENGTH THEREOF AND HAVING A ROW OF CLOSELY SPACED ORIFICE OPENINGS EXTENDING IN SUBSTANTIALLY LONGITUDINAL ALIGNMENT ALONG THE LENGTH OF SAID STATIONARY ORIFICE PLATE MEANS, SLIDABLE ORIFICE PLATE MEANS IN SUPERIMPOSED RELATION WITH SAID STATIONARY ORIFICE PLATE MEANS IN EACH BUS FLUE, SAID SLIDABLE ORIFICE PLATE MEANS HAVING AN ELONGATED ORIFICE OPENING AT EACH OF THE END PORTIONS THEREOF POSITIONED IN THE PORTIONS OF THE REGENERATORS LOCATED ADJACENT THE SIDES OF THE BATTERY, WHICH ELONGATED OPENINGS IN ALL POSITIONS OF ADJUSTMENT OF THE SLIDABLE ORIFICE PLATE MEANS RELATIVE TO THE STATIONARY ORIFICE PLATE MEANS IS POSITIONED IN SUPERIMPOSED RELATION WITH RESPECT TO A PLURALITY OF ORIFICE PLATE OPENINGS AT EACH OF THE END POSITIONS OF SAID STATIONARY ORIFICE PLATE MEANS SO AS NOT TO RESTRICT FLOW THROUGH THE SAID ORIFICE OPENINGS AT THE SAID END PORTIONS OF SAID STATIONARY ORIFICE PLATE MEANS, THE SAID SLIDABLE ORIFICE PLATE MEANS HAVING INTERMEDIATE PORTION THEREOF BETWEEN SAID END PORTIONS PROVIDED WITH A ROW OF CLOSELY SPACED ORIFICE OPENINGS EXTENDING IN SUBSTANTIALLY LONGITUDINAL ALIGNMENT ALONG THE LENGTH OF SAID INTERMEDIATE PORTION, WITH THE RESPECTIVE ORIFICE OPENINGS IN THE SAID INTERMEDIATE PORTION OF THE SLIDABLE ORIFICE PLATE MEANS POSITIONED RELATIVE TO THE ORIFICE OPENINGS IN THE INTERMEDIATE PORTION OF THE STATIONARY ORIFICE PLATE MEANS TO FORM ALIGNED PAIRS OF OPENINGS IN THE INTERMEDIATE PORTIONS OF BOTH THE STATIONARY AND SLIDABLE ORIFICE PLATE MEANS THROUGH WHICH FLOW TAKES PLACE, THE ORIFICE OPENINGS IN THE INTERMEDIATE PORTION OF SAID SLIDABLE ORIFICE PLATE MEANS HAVING A CROSS-SECTIONAL AREA LARGER THAN THE PAIRED ORIFICE OPENINGS IN THE INTERMEDIATE PORTION OF THE STATIONARY ORIFICE PLATE MEANS, AND SLIDABLE ORIFICE PLATE MEANS HAVING ONE END THEREOF POSITIONED ADJACENT TO ONE SIDE OF THE BATTERY SO THAT IT IS ACCESSIBLE FROM THAT SIDE OF THE BATTERY FOR EFFECTING SLIDING MOVEMENT OF THE SLIDABLE ORIFICE PLATE MEANS RELATIVE TO THE STATIONARY ORIFICE PLATE MEANS TO ADJUST THE SIZE OF THE INTERIOR PAIRS OF ALIGNED OPENINGS IN SAID INTERMEDIATE PORTIONS OF BOTH OF SAID ORIFICE PLATE MEANS FROM THE FULL SIZE OF THE ORIFICE OPENINGS IN THE INTERMEDIATE PORTION OF THE STATIONARY ORIFICE PLATE MEANS TO ANY DESIRED REDUCTION IN SIZE FROM SAID FULL SIZE.