US1848818A - becker - Google Patents

Description

March 8, 1932. J. BECKER QUENCHING STATION AND METHOD OF OPERATING THE SAME Filed Aug. 12 1926 5 Sheets-Sheet Mil H" H 26 INVENTOR.

. BY 5,; ATTORNEYS.

J. BECKER March 8, 1932.

QUE-NCHING STATION AND METHOD OF OPERATING THE SAME Filed Aug. 12, 1926 s Sheets-Sheer; 2

INVENTOR.

$1; A'ITORNEYS.

J. BECKER March 8, 1932 QUENGHING STATION AND METHOD OF OPERATING THE SAME Filed Aug. 12, 1926 3 Sheets-Sheet 3 INVENTOR.

46 ATTORNEYS.

l Q own A} c o c n I o e o u owo c I n 7 cue c m a.

Patented Man 8, 1 93 2 TES,

FF C JOSEPH BECKER, F rrr rsnvne tr, PE NSYLVANIA, ASSIGNOR' 'ro mnExoPrEnscoM- '7 IANY, 'OFJBITTSBURGH, PENNSYLVANIA, A COBPORAT Z [01\TOIE PENNSYLV NI QUENCI-IING S ATION AND METHOD or OPERATING THE SA E Application filed August 12, 1926. semi No.'1 28,726.

This invention comprehendsimprovements in gas treating apparatus of general ut llty and in its more specific aspects relates to the treatment of gases which arise in coke'oven quenching stations.

In the ordinary'operation of coke ovens the hot cokeat the endof the coking period is discharged from the ovens into acar'in which it is conveyed to the quenching sta-' tion and there'subjectedto sprays of water A to arrest combustion. This results, however, in the evolution of steam and noxious and objectionable gases, together with impalpable ash and coke dust or coke breeze which arise in clouds from the quenching station. These products particularly in the presence of steam, produce very deleterious eflects on surrounding structures, causing corrosion. of metal and abrasion and disintegration of the structural parts and are both unpleasant and I harmful to animal and vegetable life in'the sirable productsto a more remote point, thus.

neighborhood. Some of the objectionable features of quenching stations have been partially overcome by locating the stations at a distance from the ovens .andproviding them with walls) and chimneys to'convey the undereducing, thoughnot eliminating their 0bjectionable effects. I

The object of my invention tially eliminate the, harmful-effects of the substances arising from quenching stations by treating them to a purifying or precipis tatin'g process whereby they areseparated out and are not permitted'to escape to regions where the'y'may exert deleterious ef-" fects. This permits also the-locationof the stationsnearer the ovens thereby effecting a' saving of time required-for the operations. 1 r

. In order to accomplish these results I provide, at the quenching station, means for CO1- lecting the p roducts which arise whengthe hotj coke is treated. with a quenching spray and thereafter treat these productsbefore permitting escape of any of the gases from the quenching station. Asia convenient man ner of effecting'these results I may provide a tower into-which the productsare passed an point below the top of the tower and I is to substanthen subject the ascending productsto the action of purifying means located- .in the upper portion of thetower. I have found thattthis may be very efficiently efi'ected'by spraying downwardly from .the top of the tower, a liquidlof a'character' to accomplish the results desired. A finelydivided spray of water very satisfactorilyanswers the pur-f pose in ordinary cases audits effect is mate- Ti ria-lly increased by the, provision acrossthe towerof a 'seri'es of'hurdles or reticulated obstructions whichwhen wetted by the descending spray provide a large surface contactbetweenthe' liquid and the ascending.

products of quenching and prevent the chan- .neling of these products and the descending water, thereby producing an intimate com mingling'of the two. [By this operation the noxious gases are substantially absorbed in '5;

the descending liquid, the ascendingsteam.

is condensed, and the more solid dust-like particles are carried down thereby. The

products may be a to the spraying system,

The invention further consists in such other, new and, useful improvements, and has liquid containing the products of quenching is collected atthe base offthetower and congain returned by th-epump for furtherobjects such other operative advantages or results, as may be found to, ob

afterde'scribed andclaimed. I In the accompanying drawings tain inthe processes and apparatus herein arming a part of this specification and showing, for

purposes of exemplification, a preferred form and manner in whichthe invention may be embodied and practiced,rbut without limitinstance or instances: V

ing the claimed invention to such illustrative Fig. 1 is a vertical section taken across the v quenching station showing the essential features of one embodiment of my invention;

Fig 2 is-a' top, plan vieWjofthe station shown in Fig. 1; and A Fig. 3 is1a'vertioal section modified form of station.

Fig. 4 is a bottom plan view of the sprayer pipes 17 and 20.

The same characters of reference indicate the same parts throughout the several views.

Figures 1 and 2 show a quenching station in which the treating tower is located on the far side of the quenching chamber from the liquid supply system and its supporting structure which has the advantage that it removes the harmful products from the latter, whereas, in Fig. 3 the tow-er is located above the quenching chamber and contiguous to the liquid supply system, which .results in the economy of ground space and a more compact and rigid structure. Referring in detail to the drawings, and in particular to Figures 1 and 2 thereof, 1 indicates a housing or shed having a roof 2 for the pumping plant and connections The side 3 adjacent the trackway is-projected upwardly to meet the slopingroof or deflector 4 of the quenching chamber extending above the trackway and serving to deflect the products which arise from the hot coke when quenched to 'the lower portion of the tower. The housing 1 is supported upon foundation walls 5 and 7, the former formingone side of the collecting sump 6. Mounted upon these walls is a steel framework 8 supporting the tank or reservoir 9 connected by the piping 10 and 11 with a water pump 12' supplied from the sump 6; The pipe 11 is curved at its upper end into a horizontal direction at 11 and the-horizontal section is connected to the pipe 10, a horizontal drainepipe 14 leading. from a point opposite their connection to an outlet beyond the'wall 7. In the pipe section 14 are located two valves, 13a and 131), between which, the vertical pipe 15 makes connection with the pipe 14, the upper end of the pipe 15 being in turn connected to the'pipe 16 leading to the branched pipe 17 carrying the quenching spray pipes 17 for discharging the water employed in quenching the hot coke. The spray pipes are attached to horizontal supporting girders 18, respectively attached at one endto the tank framework 8 and at the other end to the tower framework 21 which supports the treating spray system hereinafter referred to. The latter spray system is supplied by the pipe 19 connected at its lower end to the pipe. 15 and connected at its, upper end-to the horizontal pipe 20 carrying the treating spray pipes 20 provided with openings designed to produce a finely divided spray distributed across the entire area of the treating tower. This tower is supported by the framework 21 resting on foundation walls 23 and is provided with sides 22 extending down to a funnel shaped bottom 24 emptying into the discharge pipe 25. Extending crosswiseof the tower above the point where the products arising in the quenching chamber enter are a series of horizontal hurdles or reticulated partitions 26. The pipe 25 discharges the a point directly above the trough 27 isan overflow pipe. of less'capaci-ty than the feed pipe 10. 'The foundation members 31 in the floor of the quenching chamber support blocks which carry the rails for the car 32 employed to convey the burning coke from the ovens to the quenching station. 33 is a cover, usually of wood',ffor' the sump.

In the modification shown in Fig. 3, the framework of the tower on one side consists of an extension of that portion 8 of the framework-of the tank supporting structure adjacent the trackway, while the opposite portion 21 of the framework of the tower rests upon the cross-beam 18, and the outer side wall 22 of the tower'is connected at its base to the deflecting roof member 4 extending above the quenching chamber. The funnel shaped bottom 24 has its outlet directly over the trough 27. The remaining features are substantially the same as in the first modification. q The operation of the device is substantially as follows: a

The charge of hot coke from an oven is conveyed by the car 32 to a point below the spray nozzles 17 in the quenching chamber. The valves 13a and 136 being previously closed..13a is opened and the pump 12 is started. The pump 12 will force a flow of water up the verticalpipe 11 through the horizontal portion 11 into-the pipe 15 and through the branched extensions 16 and 19 to the spray pipes 17 and'2O respectively. Since the tank 9 is located at a point above the quenching spray pipes 17 it will insure a supplemental supply of water to thesepipes for quenching the coke should the pump supply prove inadequate. Inasmuchas the tank 9 in the preferred form shown is located below the tow r treating spray pipes 20 it cannot be relied upon directly to feed these pipes. Iowever, sincethejdirection offlow from the pump at 11 is horizontal and the water there has considerable velocity in the horizontal direction, producing an aspirator effect, this taken-in connection with thefact that the rela tively small capacity of the overflow pipe 30 and the head of the w'aterin tank 9 presents considerable resistauceto flow from the pump to the tank,causes the water from the pump to ascend to the tower spray pipes 20 I may, of course, locatethe tank 9 at a sufiicient'elevation to create ahead which would. directly cause it to "feed the spray pipes20 but I prefer the former arrangement for the reason that it permits .a pump ofsmaller capacity-to be employed; since during. 7 the period when the valves 13a and 13 bareclosedthe pump need operate toreplenish the tank {under a relatively small. head only, and whennthe valve 13a-is openedthe-pump .is not-cal1edupon to deliver the entire supplyof waterto the respective sprayplpesis'incea portion of the supply to the spray pipesl? at least'may beiurnished by the tank which also serves'as ameans for steadying theqfiow. g The steam, noxious and obj actionable gases,

together with the solid particles, which arise frem the quenched coke aredirected by the guideway 4 (Figure:1.)', or 4: -(Figure 3) to r the opening in the tower 22 beneath the hurdles 26 and in rising-therethrough encounter the descending spray of water'or'other spray liquid employed. By reason of thelint e'n' position of the hurdles theyjalsoencounter in their upwardpassage the films of liquid covering the reticulated surfaces.- Thetend ency for the ascending products to formchair and from there they are .carried by. trough" 27 and return pipe; 29 to the collecting sump 1 6. The solid particlesare precipitated and the overlying liquid may again-be pumped through the systemand the. operation repeated.

- During the period when the sprays not inoperation the valve 13a is .closedandthe valve 13? opened to permit drainagev-of'the spray pipes to prevent dripping therefrom.

These valves are preferablyma'gnetically 'ac-,

. inafter made.

tuated under controlof theoperatoron the car. H 3;

The invention as hereinabove set Z'forth or exemplified *may :be variously practiced; .ox' embodied within thescopeoftheclaims here;

I claim:

. 1-. In a quenchingstationgia liquid supply system; a quenching chamber'gadjacentthereto; a settling tank *communicablyconnected above ,its bottom to the supplyfsystemj quenching spray-means connected with {said supply system and adapted tospray liquid 7 into said quenching chamber; a tower pro vided at its lower? portion-with an opening;

' supply system; {aportion of. said quenching chamber being extendedupwardly'above said communicating with saidlquenching .ichamber at the upperpart thereof for receiving the products which may arise from the quench ing operation; meansflocated abovegthe quenching spraycrmeans'" to direct. said products to said opening; treating sprayer, means located atthe topot saidtowerand .tem and adaptedgto-spray liquidlinto said i tower; and meansfor collecting liquid in the, lower part of; said quehchingchamber and the I lower parts .ofrsaid tower and. returning the same to thefsettling tank; substantially asspecified. 7

ed for treating with 1 liquid the-products whlchmay arise' fromzthe quenching operation; and Ineans=f0r collecting 'l-iquiddnthe lowerjpart l of said quenching chamber (and the lower partof saiditrfeater meansa-nd re turning the same to .the'settling tank; substantially-as specified; 9

2..In a quenchingfstationz a liquidsupply I system';fa quenching chamber adjacent thereto ;;a settling tank communicably: connected 1 above .its bottom-- to .the supply system; quenching sprayer-means connected with said; supply system and adapted to-spray liquid-into said quenching chamber;treater- (means communicating with said quenching chamber at thef upperj-part thereof and adapt- 3. -In .a quenching-station,incombination:

a liquid supply system; a-quenching chamber 5 adjacent thereto and adapted for-periodic" insertion-and removal; of a quenching car' therein -quenching'-liquid supply-means com-- .municating' with the. interior of said chamber so as to dischar e into the quenching car when therein 1 and communicating with said liquid I supply system a portion of saidquenching chamber being extended upwardly above said quenching liquid supply means so as'to form atreating tower, said treating tower'com- 10o municating at the upper part thereof-with the atmosphere and also communicating. with quenching chamber. at-the upper part: thereof so 'as-to produce a chimney effect and thereby 5 discharge from-the quenching chamber 1i up wardly" through Ithetreating tower intoethe atmosphere a products f and. heat which may.

arisefrom :the quenching: operation; spraynleansadapted to spray qliquid downwardly p into said tower; and means adapted tov prevent liquid from. said spray" means for said tower .ffroni. passing-1 [onto material; to .be

quenched the quenching. chamber. .during' the descent of the liquid fromvsaidspray-- i means g I 4'. In a quenchingstation;,incombination:

a liquid supply system a vquenching chamber dj f it. theretoand adapted tfior periodic insertiongandremoval of a" quenching car therein quenchingeliquid supply-means coinmunicating-with the inte-rior of said chamber so as to discharge: into the quenchingcar when :therein and-communicating with said quenchingliquidesupply-means to form :a treater t0wer-,. said treatingtower communicating-at; the; upper part thereof [with the of $0185 to produoe za' chimney effect and thereby discharge from the quenching chamber upwardlyzthrough the treating' tower into the atmosphere products and heat which may arise from the quenching operation spray- .lmeans adapted to sprayliquid downwardly in the treater tower; the said portion forming the itreater tower being offset from the quenchingchamber and so arranged relative thereto that liquid descending therein would .be maintained from passing onto material to be quenched in the quenching chamber during the .descentof the liquid from said spraymeans. '5. In a coke quenching station, the combination of a'quenc'hi-ng chamber anda tr'eatling chamber extending thereabove, said -treat'ing chamber communicating at the upper part thereof withethe atmosphere and also communicating with the quenching chamber at the upper part thereof :to produce a chimney effect and thereby discharge gaseous quenching products from the quenching chamber through the treating chamber into the atmosphere during the quenc'hingopera- .tion; sprayer-means mounted near and com- .municating with the upper part of each of surplus liquid from said relief means to said sum y 6. In a coke quenching station the combination of a quenching chamber and a treating i chamber extending 'th'erea'bove, said treating chamber-communicating at the upper part thereof vwith the atmosphere and also communicating with the quenching chamber at the upper part thereofito produce a chimney effect anditliere'by dischargegaseous quenching products from the quenching chamber through the treating chamber into the vatmosphere during the quenching operation; sprayer-means mounted near and communicatingwith the upper part of'each' of said chambers; a reservoir for a quenching liquid disposed at an elevationhigher than the e'levationofthe sprayer-means for said quenching chamber; :a supply sump; pipe connections leading from said reservoir to said sprayer-means; and from the sump to said reservoir; a pump adaptedto propel fluid through said pipe connections from said sump to the reservoir and to the sprayermeans; a valve in said pipe connections for controlling communication between said reservoir and said-sprayer-means3;a relief pipe communicat'in-g'with said pipe connections for relief of surplus liquid therefrom;

a reliefvalve in saidreliefpipe for controlling the fiow therethrough; and means for conveying liquid from said relief valve to said sump.

7. In a quenching station, in combination: a quenching chamber; a treater tower disposed at hi her elevation than said quenching chamber communicating therewith for receiving products and heat which may arise from the quenching operation and adapted to precipitate said products therein with liquidv and concurrently discharge said heat and residue upwardlytherethrough said treater tower communicating at its upper part with the atmosphere and communicating with the quenching chamber at the upper part thereof so as to produce a chimney effect and thereby discharge said heat and residue upwardly from the quenching chamber through the tower into theatmosphere during quenching insaid quenching chamber; means for supplying quenching liquid tosaid quenching chamber; treating-liquid supply means for supplying treating liquid to said treater tower; said treater tower also being ofl'set from said quenching chamber and having liquid directing-means associated therewith wherebytreating liquid supplied thereto and discharging therein would be maintained from contact with material being-quenched in said quenching chamber during the descent of the treating liquid from said treating liquid supply means; I

8. In a quenching station; in combination: a quenching chamber having a quenching liquid-sprayer therefor; a treater tower at a greater elevation than the quenching chamber and having a treating liquid-sprayer therefor at a greater elevation than the quenching liquid-sprayer; said treater tower communicating at the upper part thereof with the atmosphere and also communicating with the quenching chamber at the upper part thereof so as to provide achimney effect and thereby receive products which may arise in the quenching chamber during quenching therein and discharge said products upwardly through the treater tower into the atmosphere; a sump belowthe levels of said chamber and said tower for receiving spent liquidtherefrom; a reservoir at an elel vation intermediate said Sprayers; a supply pipeline leading from. said sump to said reservoir; a pumpin'said pipe line; and pipe line connections connected to said. supply pipe lineintermediate the reservoir and the pump and com'municably: connecting the sp'rayers therewith. i i

.9. In the combination defined in claim 8 an overflow pipe for the reservoir of less diam- I and adapted to direct a spray of liquid there- 7 into for washing out of said products mixed from the pump to the reservoir, and means for returning the overflow to said sump. I

10. In combination with a quenching chain: ber adapted for quenching material therein with a liquid, a tower communicating with said quenching chamberat the-upper part thereof for receiving the products which may I arise from quenched material mixed with air,

said tower being disposed above said quench- I ing chamber and communicating at its upper part with the atmosphere so as to produce a chimney effect andthereby discharge said air and. products from the quenching chamber upwardly through-the tower into the atmosphere during the quenching operation, and

sprayer means cooperating-with said tower with air concurrently with discharge of said air into the atmosphere, and means adapted v to maintainliquid directed into said tower from passing onto material being quenched in the quenching chamber during the descent -of the liquid from said sprayer means.

' of spraying of hot coke with liquid to quench V form and rise and flow upwardly by reason said coke, which comprises: flowing said products and the heat thereof upwardly into the atmosphere during quenching of the coke V passing said products during such flow into j contact with a descending spray of aqueous liquid and thereby precipitating the objectionable products therefrom; and maintain ingthe spent liquid of said spray of aqueous liquid from passing directly onto the coke being quenched during the descent of the liquid from said spray. 1

In testimony whereof, I have hereunto set my hand. V

JOSEPH BECKER 11. The'method of removing products that i

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