US1916331A - Coking apparatus - Google Patents

Description

July 4, 1933. F; PUENING COKING APPARATUS Filed Oct. 1, 1929 5 Sheets-Sheet 1 F. PUENING July 4, 1933.

COKING APPARATUS Filed Oct. 1, 1929 5 Sheets-Sheet 2 l a] INVENTOR.

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July 4, 1933. F. PUENING COKING APPARATUS Filed Oct. 1, 1929 5 Sheets-Sheet 3 July 4, 1933. F. PUENING COKING APPARATUS 5 Sheets-Sheet 5 Filed.0ct. 1. 1929 INVENTQR. fiv/rz IQ/G/W/y v z AT ORN l atented July 4, 1933 wires stares PA NT I OFFECE o'oirins ArrAnA'rns Application filed Getober 1, 1929. Serial No. 398,468.

My invention relates to coking apparatus and particularly to such apparatus as is adapted to produce low-temperature coke.

'My invention has for one of its objects to provide apparatus for producing low-temperature coke of relatively highspeciflc gravity and that is suitable for domestic use.

"A further object of my invention is to provide apparatus for producing coke'of the character described above that is adapted to maintain the coal being carbonized under certain pressure and whichis capable of operation to freely remove the coke from the carbonizing chambers.

A still further object of my'invention is to provide coking apparatus that is adapted to produce low-temperature coke that is of relatively large size and of high specific gravity and in which the walls are adapted for relative movement wherebythe coke may be easily discharged from the coking spaces therebetween.

Coke of this character can be produced economically only by continuousuniform sup ply of heat at low or medium temperatures over a period ranging from one to six hours. The process of manufacturing coke'of this character diflers materially from that in which coke israpidly manufactured in a few minutes in thin layers of or inch in thickness and which coke is intended for combustion in power plants. x

' The principal difficulty in the production of hard, dense low-temperature coke'hasbeen in the discharge of the coke from the retort-s in which it hasbeen produced. Inaccordance with approved practice, the temperature of the metal retorts for producing such lowtemperature coke should not exceed approximately 1100 to 1300 F. At such temperatures, coke shrinks very little and when the coke adheres to and interlocks with the irregularities of the surfaces ofthe retorts it will he readily'understood that it oflers relatively great resistance to its being forced from the retort.

'The walls,which are hollow, are adapted to be supplied continuously with a hot fluid h ating medium at proper temperature whereby the coking operation proceeds uniformly and at maximum speed. The Walls are so connected to the source of hot heating fluid that the latteris entirely separated from the products of distillation and in such manner, also, that the continuity of flow is not interfered with by the swinging move ment of the walls.

The present invention relates to improve ments on the apparatusI claimed and described in my U. S. application Serial No. R 339 52l for patent filed February 18, 1929, and also relates to alternative structures for embodying the broad features of my invention as claimed in the above application.

Oneof the improvements is the provision of continuous or uninterrupted flexible conduits capable of withstanding internal pressures for conducting the heating fluid from a stationary source of the heating fluid to the movable walls and return. 79

Another improvement resides in the combination of a recirculating system for supplying heating fluid to the hollow walls with means for reversingthe flow of fluid through the hollow walls every few minutes. 'Also, an improved mechanism for moving the Walls toward and away from each other that permits the location of substantially all of the linkage mechanism away from the heat of the distillation space and operates also to impart less motion to the edges of the walls nearest the points about which the walls swing than to the edges farthest removed from the pivot points.

Another improvement is the provision of small auxiliary spaces or enclosures along the vertical edges of the coking chambers in which a coarse grained material such as pieces of coke can be placed, thereby forming a small vertical column which sealsthe coking chamber and prevents escape of the finely divided and'easily flowing material being carbonized.

The invention includes an improved pushing and charging machine for charging part of the coking spaces at the same time that coke is pushed from another part of the coking spaces. Y p

A still further improvement consists in means for circulating the gases of'combus;

tion through the distillation space for warming up the apparatus to place it in service.

The improvements include large coal retaining doors, which are common to a plurality of carbonizingchambers and swing inside of the distillation chamber and a horizontally movable cover provided with Water seals that project beyond the main walls of the apparatus.

The details of my invention will be described in connection with the accompanying drawings, in which Figure 1. is a view partially in plan and partially in section on line II of Fig. 2 of apparatus constructed in accordance with my invention; a

Fig. 2 is a vertical sectionalview, taken on the line II-II of Fig. 1;

F ig..3 is a vertical sectional view taken on the line III-III of Fig. 1;

Fig. 4 is a vertical sectional view taken on line IVIV of Fig. 1;

Fig. *5 is a vertical.cross-section of a modification of the apparatus; and

. Fig. 6 is a horizontal cross-section taken on line VIVI of Fig. 5. 1

. Referring to Figs. 1 to 4.- inclusive of the drawings, coking apparatus constructed in accordance with my invention comprises a housing 1 of suitable refractory material that is of substantially rectangular shape and within which are supported for swinging horizontal movement a series of hollow walls 2. As best shown in Figs. 1 and 3, each wall 2 is supported by a horizontal beam 3 that is pivotally connected at one end by a pin 1 to a beam 5 extending transversely to the beam 3 and that is supported by suitable framework of the housing 1.

The other end. of the beam 3 or the lefthand end, as viewed in Fig. 3, is provided with a IQlEttlX'GlY wide wheel 6 thatis adapted to be supported by a rail 7. The rail 7 is supv ported by abeam 8 that is connected at its ends to the framework of the housing 1. Vhile the weight of each wall. 2 is supported at its top by the beam 3 for movement about the pin 4, the lower part of each wall is anchored by means of a bracket 9 that is pivotally connected to the housing 1. The piv' otal connection of each end of the several walls insures that they swing about a vertical axis and that the sides of adjacent "walls maintain the same spacing from top to bottom. I

, Eachof the hollow walls 2 is provided at its top with a shield 11 and at one edge with extensions or ducts 12 which are joined to flexible sheets of metal 13 forming one side of chambcrsl l and .15 that are in turn in communication with I a source of heating gases. The flexibility of the metal plates 13 permits the swinging of the walls about-pivot points which lie approximately in the plane of the metal plates 13. The metal plates 13 may be provided with corrugations to increase their flexibility.

The walls are moved by means of arms 16 connected to a source of power (not shown) which rock two vertical shafts 17 on the respective sides of the housing 1. Each of the two vertical shafts 17 is provided with three pairs of relatively long arms 18 of unequal length which are respectively connected to bell cranks 19 by means of appropriate links. The bell cranks 19 are connected to the outer ends of the walls 2 by pairs of rods 20 of unequal lengths.

Each of the two shafts 17 also is provided with three pairs of relatively short arms 21 of unequal length that are respectively connected to bell cranks 22, as is shown in Fig. 1. The bell cranks 22 are connected to the inner ends of the Walls 2 by means of pairs of rods 23 of unequal lengths. The arms 18 and bell cranks 19 actuate the ends of the movable walls that are farthest removed from the flexible plate .13 and therefore are arranged to move-the walls through a longer path of travel than is effected at the inner ends of the walls by means of the arms 21 and bell cranks 22. Therefore, the arms 18 are longer than the corresponding arms 21.

It is unnecessary to move the center one of the hollow walls 2 and the hollow walls farthest from the central wall must be moved through a greater distance than those adjacent the central wall; Therefore, the pairs of arms 18 are of unequal lengths, as are the pairs of arms 21 the ones for actuating the outermost walls eing longer than those for operating the walls adjacent the central stationary wall. The rods 20 and 23 for con necting the various bell cranks with the hollow walls are provided with stufiing glands 24 where they pass through the outer casmg l.

The bottoms of the coking chambers formed between the hollow walls are closed by two large doors 25, each of which serves to close three chambers. They are mounted on shafts 26 and the doors are counterbalanced by weights 27. The doors are opened andclosed by means of a sheave or wheel 28 and a hand-operated Windlass 29.

The top of the housing 1 is closed by a roof or platform 31 which is provided with downwardly extending flanges 32 that project into liquid seals 33 that overhang the housing 1. The platform 31 is supported by flanged wheels 34 that run on rails 35 mounted on I-beams 36.

In the illustrative example shown in Figs. 1 to 4, inclusive, the apparatus comprises seven hollow walls 2 forming six coking chambcrs therebetween. This number is taken by way of example only as any suitable number may be used.

The movable platform 31 carries a group of three coal hoppers 37 and two groups of three coke pushers each as will be described below. A As shown in the right-hand half ofFig. 2, three coal hoppers 37 extend through the platform 31 and each has a gate 38. All of the gates 38 for the several hoppers 37 are controlled by a single lever 39 that is connected to the gates orbells 38 by means of appropriate linkage. The hoppers 37 are each arranged to contain sufficient coal to charge a coking chamber. The tops of the shields 11 i above the walls have inclined edges as shown in Fig. 2, in order to facilitate the flow of coal into the coking spaces.

At both ends of each of the main coal charging hoppers 37 are located small auxiliary, bins 40 provided with gates 41. The gates 41 are opened simultaneously by a hand lever and linkage (not shown) similar to that 'used for operating. the gates 38. The auxiliarybins are for the purpose of charging coke breeze at the vertical edges of the. heating walls for sealing purposes as will be explained later. v

One group of coke pushers 42 is shown immediately above the spaces between the walls 2 in the left-hand half of Figs. 1 and 2, in

which views the walls of the left half of the apparatus are shown in their extended posi- 'tions. The coke pushers 42' removethe coke from between the walls when the latter have been separated in the manner previouslydescribed. The coke pushers 42 are carried by vertical rods 43 which extend through stuffing boxes 44 in the roof 31. The vertical rods 43 are secured to a steel frame 45, the vertical position of which is controlled by a mechanism comprising an electric motor 46 mounted thereon and having a chain-andsprocket connection to a shaft 47. The latter has a bevel gear connection at each end thereof to a transverse shaft 43 having gears 49 that coact with stationary vertical racks 50 whereby the frame 45 and the rods 43 with the corresponding pushers may beraised or lowered, as desired. V

The pushers 42 are shown in elevation in Fig; 2, but if viewed in plan would appear wedge-shaped ortapered to fit the spaces between the hollow walls when farthest removed from each other, asfshownin the lefthand half of Fig. 1. This wedge-shape insures that the pushers 42 will conform to the position of the adjacentwalls so as topass in closest proximity to the walls and remove any coke that might adhere thereto.

On the opposite side of the three coal hoppers 37 is located the second group of three pushers 42, as shown in the right-hand half of Fig. 2. This second group is not in operative position, but upon movement of the platform 31 to the left they can be brought opposite the three coking chambers in the righthand half of the apparatus, as viewed in Fig. 2. v

Each of the heating walls 2 shown in Figs.

' able motive device.

1-,2'and 3 comprises two side plates 52having plane surfaces that are spaced apart by flanged baiile members 53 of different lengths,

as best shown in Fig. 3, in order to properly regulate the flow of heating gases thereducts 12 to follow a tortuous path which traverses the entire surface of the coking space formed by the side plates 52 before the gases can leave by the other duct 12.

Each of the plates 52 terminates below the beam 3 and special shields 11 are provided above each wall for enclosing the supporting beam 3 uuonwhichthe walls are mounted for swinging movement. The supporting beams 3 are much cooler than the wall plates 52 and the difference in temperature wculdbuckle or warp the plates 52 if they were not terminated short of the relatively cool beams 3.

As clearly shown in Fig. 1, the vertical edges of the coking spaces are closed by flanges 56 carried by the adjacent walls .Vhen the walls are in fllOSQClTJOSl't-loll the flanges 56 do not touch each other, and as a result the walls are free to warp slightly, immediately beyond the flanges 56' are locateda' second set of flanges 57 forming in conjunction with the iirst flanges narrow chambers 58 at the vertical edges of each coking space, whichare acapted toreceive small coke or small pieces of material after the walls are swung toward each other to their closest posiz' ions and before the coal or material to be carbonized, usually infine pulverized conditiornis deposited in the coking spacesextending from one set of flanges 56 to the other. i Y

The heating gases are supplied to the hollow Walls by means of a circulating fan 60 driven by a steam turbine 61 or o 'her suit- .The fan, directs the heating gases through a conduit 62 into a vertical chamber 63 shown in Fig. 4. The verticalchamber 63 forms part of a reversing valve arrangement which includes an exactly similar chamber 64 that is in communication with a stack throug'l-i a duct 65, and which is also in communication with a duct 66 communicating with the intake of the fan 60.

Only asmall portion of the gases from the narrow vertical chamber 64 pass out through the duct 65 and most of the gases leaving thechamber 64 pass through duct 66to the intake of the fan. Such volume of gases as leaves the closed circuit through duct 65 is replaced by gases of combustion through an opening 67- that in turn is supplied by the burner 68. Vertical baflies 69 serve to agitate and mix the gases. A thermometer 70 indicates the temperature of the gases as they leave the fan.

The circuit is a closed one as all ofthe gases enter the vertical chamber '63, pass through the valve, and the hollow walls 2 and are then returned through the valve to the chamber 64.. Adjacentthe two vertical chambers 63 and 64; are the two horizontal arranged chambers 14- and 15 shown in Fig. 3. The two pairs of chambers communicate through four openings 71, 72, 73 and 74.

Two diagonally located openings are always open while the other two are closed by means of reversing valves 75 and 76 shown in Fig. 3, and also shown in Fig.1. Valve 75 is mounted on a vertical shaft 77 provided with a spur gear 78 at, its lower end. Valve 76 is mounted on a tube 80 at the lower end 01" which is a spur gear 81. Gears 78 and 81 are simultaneously rotated in opposite directions by mechanism (not shown), reversing the valves 75 and 76 to open one pair and to close the opposite pair of the openings 71 to 74 inclusive.

Chambers 14 and 15 are provided with dampers 83 and 84 respectively which are kept closed at all times except when the apparatus is being placed in operation from a cold condition. The opening of the dampers 83 and 84 permits the gases of combustion to circulate outside of the hollow walls 2 until such time as distillation starts.

After the apparatus is heated up and the distillation commences, dampers 83 and 8 1 are closed, and the distillate circulates throughout the entire space within the housing 1, exterior to the hollow walls 2, and passes out through the pipe 86.

Coke discharged from between the hollow walls drops from the door 25 into the hopper 88 that forms the lower part of the housing 1, and passes into a car 89 through a door 90 that is provided with a liquid seal 91.

The operation of the apparatus of my invention will now be described:

It may be assumed that the walls 2 are in their normal or closed positions, as shown in the right-hand half of the apparatus as viewed in Figs. 1 and 2, and that hot gases from the fan 60 and recirculation system are being supplied through the ducts or extensions 12 for circulation through the heating walls 2. It may be assumed further that the hoppers 37 are filled with finely divided coal and the auxiliary hoppers 40 with coke breeze.

In order to fill the spaces 58 between the several, heating walls 2, the gates 41 are opened by a lever (not shown) and after the spaces 58 are filled, gates 4:1 are closed and gates 38 are opened, filling the main coking spaces bet-ween the heating walls 2 with the finely divided coal that is to be coked.

The hoppers 37 are refilled from any suitable source-and the platform 31'is inoved to the left to register with the other coking spaces and the latter are filled in a similar manner.

The heating of the walls 2 continues for a period that varies with the thickness of the coke that is being produced, which may, for example, require a period of approximately two hours to produce coke that is about three inches in thickness. The temperature of the gases employed may be, for example, about 1250 F. upon entering the heating Walls and. about 1150 F upon leaving the walls. Th comparatively small drop in temperature insures greater uniformity of temperature throughout the coking mass.

If the circulation of gases continued in the same direction through the hollow walls there would be a variation in temperature from the top to the responding to the drop in temperature of the gases leaving the walls as compared with the temperature of the gases entering the walls.

This is overcome by reversing the valves from time to time, which period is about five minutes for the apparatus illustrated. The reversal is brought about simply by the re versal oi the position of the valves 75 and '76.

My application No. 315,271, filed Oct. 26,

1928, discloses mechanism for reversing similar valves.

Gases of distlllation escape through a pipe 86 in a side wall of the housing and may be conducted to any suitable byproduct apparatus. Any tar flowing to the bottom of the housing 1, for example, when the operation of the apparatus is first begun, is caught in the liquid seal 91 fromwhich it can be drained.

lVhen the coking is completed, the hollow walls can be spread apart as shown in the left-handside of Figs. 1 and 2, and doors 25 bottom of the wall cordropped and the pushing mechanism located on the lefthand side of the platform 31 put in operation to remove any adhering pieces of coke from the walls 52 by means of the pushers 42.

After this group of pushers 42 are retracted the movable platform 31 can be moved to its extremeleft-hand position, whereupon the coking chambers on the right-hand side of the apparatus eanbe pushed by the other pushers 42. The doors 25 are then closed in readiness for the subsequent fillingoperation.

The foregoing sequence may be varied as desired, for example, by charging and discharging the groups of coking chambers altoraately at des red intervals. I

The modification shown in Figs. 5 and (3 is provided with a rectangular housing and hollow movable heating walls 96 suspended from I-beams or supports 97 and having a conduit 98 in the interior of each wall' for the conveyanceof heating flu-id.

The conduit'98 is connected'by means of flexible'metallic tubes 99 to the headers 100 and 101. s The header 101 is connected by a pipe 102 to a coil 103, and header 100 is joined directly to the other end of the coil 103. Coil 103 is surrounded by a housing 104-and is heated by gases from acombustion space 105 supplied by a burner 106.

A screw propeller type of pump 108 circulates the heating fluid either through header 100, conduit 98,- header 101 and pipe 102 through the coil 103,-or uponreversal of the bevel gears 109, can'circulate the fluid in the opposite direction. The gases of combus tion normally pass through an opening 111 leadin to the coil l03 and out through opening 112, damper 113 being open; However,

when the apparatus is to be warmed up from.

ordinary temperatures, dampers 11 1 and 115 are opened and damper 113 closed in order to circulate the gasesof combustion throughout the entire housing 95, because the heating fluid used in this modification is either a inolten metal or a fused salt and such materials,

solid at ordinary temperatures, must'be liq-- uefied previous to their circulation.

- The top of the housing 95 is provided with a platform 118upon'which a suitable charging and pushing mechanism is mounted. The several heating walls ar'e'moved to and fromeach other by linkage connected to the four lugs 119 of each wall.

The bottom of the coking spaces between the walls 96 are closed by a door 120. 0 I

The modification shown in Figs. 5 and 6 difiers from the embodiment of the invention 'showninFigs. 1 to 4 inclusive, in the substitution of a heating liquid such as a metal having a low melting point or a fused saltin place of heating gases. The flexible connections, owing to the more compactnature'of the heating fluid, can be made so much longer that the movement of the heating walls is not limited to a swinging motion and they can be moved uniformly to positions that are par'allel to their original or operating'positions.

The linkage for moving the walls may be arranged to move the bottom pairs oflugs 119 through" a greater distance than the'correspending upper pairs of lugs 119 at the time of discharge ofthe'cokei This producesa progressively increasingspacing apart of the walls in a downward direction and facilitates the downward removal of the coke.

,The heating fluid circulated in the hollo walls circulates infa system entirely separate fromthe circuit of the gases of combustion. Heat is transferred from one to the other by means of a heat exchanger, which is'the coil 103. There is no discharge of a small part ofthe products of combustion whilev the remainder of the products are recirculated. All of the products of combustion leave the system after passing in contact with the coil 103.

The operation of the modification shown in Figs. 5 6 is essentially the same as the operation'of the one shown in Figs. 1 and 1. The propeller pump 108 is reversed periodi cally just as are the valves in the other ap paratus. 1 T is sametypes of charging, pushing and wall moving mechanisms are used that were described in connection with Figures 1 to i inclusive.

The advantage of the uninterrupted or continuous flexible ducts leading from the stationary part of the apparatus to the movable walls is that direct and straight connections of lar e size are possible when gases of combustion are used as the heating fluid. The ducts 12, as shown in Figs.1,'2 and3 are at right angles to the axis about which the hollow walls pivot.

ible connections are capable of withstanding internal pressure it'is possible to use a more powerful pumpiorthe'circulation of the heating fluid and to reduce the sizeof the connections, which in'turnresults in greater freedom ofmovement of the walls.

Thecirculation of'the heating gases as controlled by the reversing valves results in uniformity oflieating-otthe hollow "walls, a

great advantage as there is small latitude between a temperature high enough to carbonize the coal and one low enough to avoid oXidation of the metal.

The provision ofthe coke seals is advantageous since such large walls, kept at such a high temperature cannot have a close fit and e the material to be coked is pulverized before being deposited between the wallsand would escape without the seals;

l/Vhile I have show and described preferred embodiments of my invention, it is understood that it is not to be limited thereto eX- cept as expressed in the cla'ims.

I claim as my invention: Y 1. Tn carbonizing'apparatus, a housing for confining distillate, relatively movable hollow walls having vertical pivotal supports within the housing and hav'ing-carbonizing spaces tliercbetween, means for separating said walls forthe removal of carbonized'ma terial from said spaces, said walls serving as conduits for heating fluid, a combustion bonizingchambers therebetween, means for Owing to the fact that the continuousffiexseparating saidwalls for the removal of carbonized material, flexible plates mounted in the sides of the stationary housing and conduits extending through said plates to said,

passageways within the walls, and said can bonizing chambers being in communication with said housing.

3. Carbonizing apparatus comprising a stationary housing, movable walls within the housing, said walls forming carbonizing spaces therebetween, means for separating said walls for the removal of carbonized material from said spaces, and said walls being hollow to permit the circulation of a heating fluid therethrough, flexible connections in the sides of the housing and conduits extending therethrough for conveying the heating fluid to and from said connections to the heating walls whereby dist-illates can pass from the edges of the carbonizing spaces into said housing. 7 Y

4. Carbonizing apparatus 1 comprising a stationary source of heating fluid, movable heating walls, said walls being horizontally movable about vertical pivotal supports being hollow to permit circulation of the heating fluid therethrough, eachadjacent pair of said walls being adapted to form a carbonizing chamber therebetween, means for separating said walls for the removal of carbonized material from said chambers, conduits for conveyingthe heating fluid from the stationary source of heating fluid to said heating walls and means for flexibly connectingthe conduits to the stationary source.

' the conduits and said source and said exit.

6. Carbonizing apparatus comprising a stationary housing, movable walls inside the housing having passageways therein for a heating fluid, devices for moving the walls adjacent to each other to form carbonizing chambers therebetween and for separating them for the removal of carbonized material, ducts for conveying the heating fluid through the sides of the housing into the passageways within said movable walls, and means for establishing communication between said ducts and the interior of the housing before distillation temperature is attained.

7 Carbonizing apparatus comprising hollow walls arranged for relative horizontal.

movement about vertical axes and spaced'to provide achamber therebetween, means for separately supplying said hollow walls with heating gases, and a plurality of ribs located along the vertical edges of thevwalls adapted vertical axis at the outer ends of the extensions, a furnace, and a flexible plate having openings therethrough for connecting the furnace'and the outer ends of said extensions.

9. A cokin chamber having a row of relatively mova le vertical side walls pivoted for horizontal novement and having adjacent ribs'at the vertical edges of saidwalls to provide a space that is adapted to be filled with coarse material for sealing the material to be carbonizedin thecoking chamber.

10. Carbonization apparatus comprising a plurality of relatively movable walls arranged for the circulation of heating fluid therein and spaced to form carbonizing chambers therebetween, a stationary furnace for supplying the heating fluid and having a structure comprising a flexible plate, conduits extending through said plate and connected to the interiors of the movable walls, said flexible plate being spaced from the coking chambers and said walls pivoting about points adjacent the plane of the plate.

11. Distillation apparatus comprising a group of relatively movable walls arranged in a row side-by-side, said walls being arranged forcirculation of heating fluid therein and, forming coking chambers therebe tween, a housing for the walls, rods movable through the sides of the housing and connected to the walls, respectively, for moving them sidewise and a rotatable shaft having arms connected to saidrods, the arms that actuate the walls being of progressively greater length, proceeding outwardly from the center of the group. v

12. Distillation apparatus comprising. a group of relatively movable walls arranged side-by-side in a row, said wallsbeing arranged for the circulation of heating fluid therein and forming coking chambers therebetween, a housing for'the walls, rods connected to the'walls, respectively, and extend ing to the exteriorof the housing and means exterior of thehousing for actuating the. rods through progressively greater distances.

according as they are connected to walls in order proceeding outwardly from the center of thegroup to move said walls laterally with respect to each other.

13. Carbonization apparatus comprising a stationaryheating wall arranged for the cir-,

, nected to the wall walls, the hot gas culation of heating fluid therein, a plurality of similar movable walls located at one side of the stationary wall and arranged side-byside in a row therewith, all arranged to form coking chambers therebetween, a housing for the walls for receivingthe distillate, rods projecting through the sides of the housing for actuating the movable walls respectively, sidewise along said row, and mechanism'located exterior of the housing and 'rranged to give greater movement to the rods confarthest removed from the stationary wall than to the rods connected to the walls nearest the stationary 5 wall.

14. A coking chamber and heating wallenclosing chamber, a series of alternate substantially vertical coking chambers and pend-- ant flued static heating wa ls therefor, ar-

" ranged laterally of each other in a row said enclosing chamber, each saidheating walls being adapted for being maintained stationary relative to each other and the coking chambers when the latter are filled with coal for coking and being mounted for movement to increase the coking chamber space between the heating walls relative to each other in said chamber for discharge of finished coke from said coking chambers, hot gas fines for circulating hot gaseous combustion products through the fines of said heating walls, inlet and outlet conduits communicably connecting the fines of said heating walls with said hot gas flues, and means for moving the heating walls relative to each other for discharge of finished coke from the coking chambers, each of said coking chambers communicating with said enclosing chamber, and the fines of each of said heating flues and the inlet and outlet conduits therefor being closed to said enclosing chamber, and a distillate gas olftake conduit communicating with said enclosing chamber for ofi-fiow of distillate therefrom separately from the hot combustion gas, each of said inlet and outlet conduits comprising a flexible gas-tight connection between the hot gas fines and the flued heating walls.

15. A coking chamber and heating wallenclosing chamber, a series of alternate substantially vertical coking chambers and pendant fiued static heating walls therefor, arranged laterally of each other in a row in said enclosing chamber, each of said heating walls being adapted for being n1aintained stationary relative to each other and the coking chambers when the latter are filled with coal for coking and being mounted for movement to increase the coking chamber space between the heating walls relative to each other in said chamber for discharge of finished coke from said coking chambers, a fuel combustion chamber exterior to said enclosing chamber, hot gas fines for circulating hot gaseous combustion products in cycle through the flues of said heating walls and the combustion chamber, inlet and outlet conduits communicably connecting the fines of said heating walls with said hot gas flues, and means for moving the heating walls relative to each other 1 i'Ol discharge of finished coke from the coking chambers, each of said coking chambers communicating with said enclosing chamber, and the flues of each of said heating walls, the hot gas flues and the inlet and outlet conduits therefor being closed to said enclosing chamber, and a distillate gas oiftake conduit communicating with said enclosing chamber for olf-fiowof distillate therefrom separately from the hot combustion gas, each of said inlet and outlet conduits comprising a flexible gas-tight connection between the hot gas fines and the fiued heat-ing walls.

In testimony whereof, I have hereunto subscribed my name this 26th day of Sept-ember FRANZ PUENING.

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