US1597365A - Gas control for coke ovens - Google Patents

Description

Aug. 24 1926.

C. T. KEIGLEY ET AL OAS CONTROL FOR COKE OVENS Filed July 7', 2 sheets-sheet 1 Aug. 24,1926. 1,597,365

C. T. KEIGLEY AL vvGAS CONTROL FOR COKE ovENs y Filed July v, 1921' 2 sheets-sheet 2 a 'f 1 Ir* i n E Patented Aug.,` 24, 1926.

UNITED STATES PATENT oFF1cE.

CLAIR/ET. KEGLEY, OF WOODWRD, ALABAMA., AND GEORGE LAMBERTON, OF LRAIN,

OHIO.

GAS CONTROL FOR COKE OVENS.

Application led July 7,

lThis invention relates to controls for regenerative coke ovens, and more particularly to means for shuttinpr off `thcgas to the oven when the supply fails.

The principal object of the invention is to i provide control mechanism that Will automatically shut off the gas to a coke oveny of a battery of coke ovens, and a gas holder having our invention applied thereto.

Figure 2 is a diagram of the control circuits used to operate the niotor for the gas .valves of one side of the furnace. I

Referring particularly to the drawings, A and B designate the pusher and coke sides, respectively, of a battery of coke ovens of the Koppers type having the usual gas mains 2 for supplying gas to the ovens. The mains 2 have a plurality of branch pipes 3 leading to burners 4, which enter the vertical fines of the ovens, and each pipe 2 is provided with a control valve 5. The several control valvesl 5 on the pushern side of the ovens are connected to-a flexible oper-- ating member such as a cable (i, which is trained over suitable .sheave Wheels 7 and carries a countervvcight 8 on its one end and has its other end connected to a reversin;` machine 9, operated by a motor l0.

The several control valves 5 on the colte side of the ovens are connected to a flexible operating member or cable 1l. which is trained over suitable sheave Wheels l2 and carries a counter-weight 13 on its one end and has its other end connected to a reversing machine 14, operated by a motor l5. Each ot' the burners 5 havea dccorbonizing valve 1G connected therewith. The decarbonining valves 16 'on the lpusher side of the oven are connected to a counter- Weighted flexible member Qr,` cable 17 which is adapted to be operated by a dec'arbonizing valve operating machine 1.8, havinga motor 18', and the decarbonizing valves 16 on the colte side are connected to a similar counter- Weighted liexible member or cable' 19 which matic elevation of the puit-fer and coke sides 1921. serial Nn. 482,953.

is operated by a decarbonizing valve open ating machine 20 having a motor 20.

A stack or conduit 2l is provided for the products of combustion and has reversing dampers 22 and 23 connected, respectively, by flexible members 24 and 25 secured to sheave Wheels 9a and le, which in turn are driven by reversing machine so that the draft from one Side of the oven to the other may be reversed when the firing is reversed from one side to the other.

Air valves 7 5 are mounted on the pusher side of the stack 2l and other air valves 76 are mounted on the coke side oi the' staclr, and are adapted to be opened or closed by cables 77 and 7 8, respectively, which are secured to sheave `Wheels 9a and 14, respectively, in such a manner that when the danipers 22 and 23 arelou'ered, the respective air valves 7 5 and 76 vvill be opened and vice versa.

A gas holder 27 is adapted to receive and store gas after the by-products have been removed therefrom, and is provided with a vertically movable bell 28, a supply main 29 enters the gas holder 2T at the bottom, and outlet mains 30.and 31 lead therefrom. The outlet main -30 is provided with branches 32 and leading to the burner supply mains 2, and the outlet main 3l leads to distributing branches (not shown) and .is provided with an automatic shut-oil' valve 34, adapt-ed to shut oil' the How of gas therethrough vwhen the supply ot gas in the holder fails.

rthe valve 3e is operated by means of a flexible cable mechanism 35 connected with the bell 2S of the gas holder 27.

`A .contacter 36 which is mounted on the Vbell 2S of the gas holder, is adapted to engage with and complete a circuit through the ' contacts 36 and 37, which are mounted on the base or bodyportion of the holder, when the volume ory pressure of fijas 'in the holder 27 is lessened `to the predetermined point at which the bell 28 is lowered enough to cause the contacter the contacts 36,

Bridging; of the contacts 36 and 37 by the contacter 36 will. complete al control circuit, to operate the mechanism for controlling' the circuits 'to the motors l0 or l5, according to which side of the oven is being tired.

36 to bridge across circuitthrough the rmagnet coil of switch respective sides of the ovens are tiring.

The control circuits necessary in carrying out this invention are shown in the diagram or1 Figure 2- as combined with the ordinary automatic control circuits for thel motors olE the gas valves and decai'boniziug valves. The heavy lines denote the new circuits, necessary to carry out the invention.

-Assuming that the ovens are being. tired on the pusher side of the battery ot' ovens, and that the gas sup ly in the holder 2T has decreased suiicient y to allow the bell 23 to drop, closing contactors 36 and 37, a control circuit will thus be established through contacter E, as follows :-'plus line through the contacter 36 and contacts 36-3T through wire i2 to 'switch 39. Since, las shown in the drawings, the pusher side of the oven is beingf red, the switch 39 will be closed.` The circuit is therefore through switch 39 tov a Wire 43, through a coil olf contacter E to 'wire le and to minus line, thus closing contacter Contactor E is adapted to be normally energized by an electric circuit controlled by a standard clock control (not shown), so as toclose the circuit to the timing motor F at predetermined intervals,"vvhich timing motor will operate the switches controlling the electric circuits to the v alve operating motors '10 and l5 tocause a reversal of the valves at predetermined intervals. The closing of contaotor E closes the armature circuit to -a timing motor F, setting it in motion to operate the timing,y mechanism Y, which in turn actuates the switch a or al according to whether the gas is burning on the pusher or coke side, v

With the gas burning on the pusher side of the ovens as here shown, switch a would be closed irst, `thus closing a circuit from plus line, to lwire 4-6, to limit switch 47, for decarbonizing valve motor 20', through the two top contacts 47, 47 oi this switch to magnet coil of magnetic switch X on the controller for tdecarbonizing valve motor 20" to minus side of line as shown, The closing of switch rX on the controller conipletes the armature circuit of decarboniaing valve motor 20, which motor will run until limit switch 47 has moved from position wirf-'nt to position n-n. In other words, contacts n-Jf will be under the lingers of the limit switchin place ot the contacts lVhen this takes place, a control vX, of the controller for the motor will be opened, thus-opening switch X and stopping decarbonizing valve motor 20'.

As soon as the limit switch 47 liasfinoved from position vnf-m to position n n a circuit will be established' from wire li6 thro n.gli

contacts 0 0 of limit switch Li7 to contacts y -p on gas valve limit switch to wire 5i). to magnetic, coil of contactor 51 oit the controller 4for the gas -valre motorV l0 to the minus line. Closing of the contactor 51 conipla-tes ai'iiiature t `cuit of gas valve motor it) as follows': troiii plus line through wire 52 to wire fill, contactor 5l and wire 54, to armature ol" gas valve motor l0, then through wire to iuiiius line. The gas ralvciiuotor i() will i'un until limit switch 4f) is moved 'troni position fr-r to position s--s when the circuit will be broken to motor l0 and the motor stopped. The limit switch 49 is so adjusted that the gas valves operated by the motor i0 will be in closed position when the iiiotoi l() is stopped. At the same time switch 39 will open, thus open- -ing central circuit through one-halt or maguet coil of thedouble coil cont-actor E,

stopping timing motor F, thus preventing;

any further operation of the gas. reversing machinery. 4

When the contacts 3G and 37 are connected by the bridge contacter 36 so as to thereby close the control circuit to the contaetor E, a circuit is also closed to an audible signal such as a Klaxon horn GO, as follows from wire 42 through wire 6l, thence through the windings of the horn GO, to wire 62, puslrbutton 63, and kwire 64 to minus line as shown, the purpose of this audible signal is to call the attention of the operator to the fact that the gas is beingshut oil from the ovens.

. While we have described and. illustrated only one form of oui'invention it will be understood that we do not wish to ybe limited' thereto, `sincezvarious modifications may be made within the scope of the :appended claims.` j y Ve claim:

1. In a gas control system for by-product eolie ovens, the combination with a series of gas burners on each side of said ovens for heating-*said ovens, a gas holder, mains leading` from said gas holder to said burners, and controlling and reversing valves for controlling the flow ot-'gas from said mains K to saidY burners, of electric motors `for operating said valves, electric circuits for saidv motors, and means operable by said gas holder for completing the electric circuits to said motors to cause said motors to cloreA said valves when the gas in ksaid gas holder falls below a Apredeterinined pressure.

2. In a gas control system lfor by-product colte ovens, the combination with -a series of burners on each sideV of said ovens for heating said ovens, -a ygas holder, conduits leading fiomsaid gas holder to said burners, 'controlling and reversing valves for controlling tlie flow of gas from said conduits .to said burners, electric Imotors for operating said lvalves, and` electric circuits forsaid Leemans motors, and electrically operatedmeans for normally closing said electric circuitsto said motors at' predetermined intervals to cause the operation of said valves, of means operable by said as holder when the gas in said gas holder fa ls below a sure for energizing said electrically operated means to thereby cause said means to close the circuits to said motors whereby said motors will operate to close said' valves.

3. In ay gas control system for by-product coke ovens, the combination with a series of as burnerson each side of said ovens for eating said ovens, a gas holder,cornduits leadin from said gas holder to said burners, contro lin and reversing valves for control ling the ow ofgas from said conduits to said burners, electric motors for operatin said valves, and electric circuits for said motors, and electrically operated means for normally closing said electric circuits to said motors at predetermined intervals to cause the operation of said valves, of an electrical circuit for energizing said electricallyvoperated means for closing the circuits to said motors', 'and electrical contacts carried by .said gas holder andadapted to close said predetermined preselectrical circuit for energizing said electrically operated means for closing the electric circuits to said motors whenvthe gas in said holder falls below a predetermined pressure.

4. The combination with a coke oven hav ing'gas burners for heating the same, valves for controlling the flow of gas to said burners, an electric control means foralternately Vopening and closing said valves, and an electri'cally actuated contact element for said control mans, of a gas supply -for said burners, a pressure res onsive contact element associatedwith t e gas supply, said pressure res onsive contact being operatively connected tlrough a circuit with said elec trically operated contact to effect the operation of said control means to close said valves when the gas supply pressure falls below a predetermined minimum.

In testimony whereof I have hereunto signed my name. i

In testimony signed my name GEORGE LAMBEnToN.

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