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Oct. 11, 1938. ' L. RUMFORD. 2D I v ' 2,133,045 1 REG‘ENERATIVE ‘FURNACE AND MEANS FOR‘ MEASURING THE TEMPERATURE THEREOF Filed Dec‘. 24, 1936 RAD’ATION ‘ PYROMETER TEMPERATURE RECORDER GAS ‘ ‘ INVENTOR. LEW/J fl/Mro/Po [1 BY 4 g - ‘ - ATTORNEYS ' 2,133,045 I Patented’ Oct. 11, 1938 UNITED STATESEPATENT. OFFICE ' 2,133,045 REGENERATIVE FURNACE AND MEANS FOR gIEEASURING THE TEMPERATURE THERE .Lewis Rumford, 11, Wilmington, Del., asslgnor’ to United States Steel Corporation, New’ York, N_. Y.,_ a corporation of New Jersey Application December 24, 1936, Serial No. 117,665 4 Claims. (01. 73-343) This invention relates to regenerative furnaces. heated by producer gas. It is customary to pre heat both the producer gas and the .air admixed ‘therewith for combustion purposes before pass ing the gas and air into the furnace. This is ac ing operation of the same. ' complished by\providing two checker chambers 5 _ In order tooperate an open hearth furnace ef ?ciently some means fordetermining the checker at each end of the furnace indicated as A—A’ chamber temperatures must be provided so that and B—B', chambers A and B serving as pre heat chambers for the air and chambers A’—B' both ends of the furnace may be properly'bal serving as preheat chambers for the producer gas. anced as to temperatures and so that overheat 10 ing of the checker ‘chambers may not occur. In the position indicated in the drawing cham- 10 Otherwise the reversing of the furnace manually ' has A—-A’v are serving as preheat chamber for or automatically is performed purely by guess ' the air and producer gas respectively during one heating cycle and chambers B—B’ are being work, which at best is unreliable and unsatisfac heated by the outgoing gases of combustion, the tory. 15 ' 15 One of the objects of the present invention is ?ow of gases being indicated by arrows. In accordance with the present invention I to provide means to obtain a continuous record of checker chamber temperatures to facilitate dispose radiation pyrometers Pl, P2, P3 and P4 the operation of a regenerative furnace and to in a position to be sighted through suitable open obtain thereby the maximum efficiency thereof. ings ‘in the walls of chambers A’, A, B and'B' respectively upon the top of the checker brick- 20' 20 Another object is to provide means to deter work 4 vlocated therein and then provide solenoid mine the temperatures attained by the checker brick located at the hottest point in the checker actuated ‘shutter means SI and S2 to cover up the openings in chambers A’ and B’ (the pro chamber during the' time the said checker cham ducer _gas preheat chambers) when the said ‘her is being heated by outgoing gases and to pro 25 vide means associated therewith to interrupt or chambers are being utilized as preheat chambers 25, discontinue such ‘temperature measurements but to uncover the openings when the chambers while the said checker chamber'is cooling down vare being utilized as exhaust chambers. and are being heated up preparatory to again serving as during the passage of incoming gases‘ there ' ' through. Other objects will be apparent as the preheat chambers. In the normal reversing procedure, the manu- 30 30 invention is more fully disclosed. ' , ally operating and the automatically operating In ‘accordance with the objects of the presen invention I dispose‘ a radiation pyrometer‘in a reversing means provided functions to simulta position to be sighted through an opening in the I neously reverse .valves VI and V2 into the dotted position indicated and then back to the solid ‘ checker chamber wall upon the checker brick line position indicated, the period of reversal de- 35 35 work therein at the point where the brick is sub jected to the maximum heating effects incident pending upon the temperatures attained in the to the passage of heated gases therethrough and ~ checker chambers at each heating up cycle. Re provide means for closing automatically the said ' versal of valves VI and V2 is accomplished by opening when the furnace is reversed so that no hydraulic rams R (indicated schematically). To avoid danger of explosion by the escape '40 40 temperature measurements then are made until and ‘more particularly to means for measuring the temperatures attained in said furnaces dur a following reversal‘ automatically uncovers the . saidopening. As a‘ specific embodiment of the‘ present invention I preferably employ a shutter and solenoid actuated means for moving the 45 shutter into positionto cover and uncover the said opening. ' ' " ' Referencein this connection should be made - to the single figure of the accompanying draw of producer gas through the openings through which pyrometers Pi and P4 are sighted or by the entrance of air into the chamber‘through these openings, it is essential that the solenoid actu ated means SI and S2 covering and uncovering 45 » these openings should act positively upon the ‘ actuation of valve V2. » ‘ I therefore dispose an. extension rod 6 upon _ ing wherein, I have schematically illustrated the , the hydraulic ram R. actuating valve V2 in such position as to strike spring contacts 6-6’ at op- 50 50 present invention. 7. Referring to the drawing, the regenerative fur nace is indicated schematically as comprising a ‘ hearth l retaining a metal bath‘ 2 and enclosed from the atmosphere by roof 3. The regenera 55 tive furnace indicated is the'type adapted to be posite strokes of theram causing them to make electrical contact with contacts ‘If-‘I’. Numeral 5' ‘indicates the position taken by rod 5 at the other end of the stroke of ram R. Upon the closing of either contacts 6-8" with 55 2,133,045 " 2 . 1. 1-4? solenoid SI are: (as the case'm'ay be} is " tion, and means actuated by said furnace revers— energized thereby operating to open the shutter ing means to energize and de-energize said sole and uncovering the opening through which noid means upon operation of said reversing means, said energlzation and de-energization of In the position'shown in the drawing the checker -, the solenoid vmeans being adapted to open the chambers to the left (A'--A‘) are operating on shutter element in the ‘opening during the heat what is known as the preheat or ingoing cy'cleand ing up period for the chamber and to close the _ chambers 8-3’ (to the right) are operating on shutter ,during the period of cooling down, 3. A regenerative furnace including checker the heating‘ up or outgoing gas cycle. The ar 10 rangement-indicated' permits solenoid S2 ‘to- be chambers‘disposedv adjacent each end 'of the fur 10 energized and pyrometer P4 to record the tem-' mace for the preheating of air and gaseous fuel peratures attainedhwhereas solenoid SI is de-_ for the furnace meanstc reverse the said fur energized and pyrometer Pi is prevented from ' nace; to alternately pass the gaseous products of recording. Pyrometers P2 and P3, however, combustion from the furnace-through the said‘ 15 record the temperatures obtained in chambers A check chambers, an opening through the wall of 15 checker chamber adjacent the top there and B’ respectively. Upon reversal solenoid Si ,each of,‘ a radiation pyrometer device each ' is energized and solenoid S2 de-energized and opening, a shutter element located 'in each open pyrometer I-‘l becomes'recording whereas pyrom ‘ing, solenoid actuated means to position each '20 eter P4 does not record. smutter to block 011 radiation passing to the Having described the present invention and‘ pyrometer from said chamber, and means ac given one speci?c embodiment of the same, itv ,tuated by said furnace reversing means to en - is apparent that modifications and adaptations ergize each solenoid actuated means to thereby may be ‘made thereof and all such’ are con position said shutter in blocking position during 25 templated as may .fall within the scope, of. the the cooting period and in unblocking position accompanying claims: 1 during the heating up period of the checker What I claim is: 1. A regenerative furnace, checker chambers , 4. A regenerative furnace of the gaseous fuel adapted to preheat the air and gaseous fuel ‘: type, a pair of checker chambers disposed ad?‘ 30 in said furnace, each chamber being pro _‘ iacent each end of said furnace and communicat vided with an opening in, one wall thereof, a iing therewith, means to pass air and gaseous fuel radiation pyrometer device closing said opening, through one pair of chambers while the op shutter means disposed in said opening inter posite pair are being heated up by the passage of mediate said pyrometer and the interior of saidv gaseous products of combustion from the pyrometer R4 (or Pl as the case may be) is sighted. 35 chamber, and solenoid actuated means to move , therethrough, means to reverse the ?ow of said _ said shutter means to open and closed positions gases to- thereby preheat said air and gaseous fuei and means actuated upon reversal of said furnace before entering into said furnace, means to de to energize and de-energize the said solenoid termine the temperatures of said chambers, said means including an opening through a wall of means. _ i I . ‘ 2. A regenerative furnace including checker ‘ each checker chamber and a radiation pyrometer chambers disposed adjacent end of said furnace and provided with means to reverse the device closing ,each of, said v‘openings, shutter ‘means in each opening of the chambers through which gaseous fuel passes and adopted in one fuel and air- supply to the furnace thereby to alternately heat up and cool down-said chambers ' position to close oif one of said radiation pyrom by the passage ct'outgoing gases of combustion eter devices from radiationv emitted from one and ingcing fuel and air therethrough respec of said chambers and in a second position to per - . tively, each checker chamber being provided with mit said radiation to pass to said pyrometer de— means to determine the temperatures attained , ‘vice, solenoid actuated means to operate each of ' said shutter means into said two positions, and means actuated automatically by said reversing cluding an opening extending through the wall 'means- to energize the said solenoid actuated of said chamber adjacent the‘ top thereof, a means operating the shutter means to thereby by the checker brickwork in said checker cham hers during the heating up'cycle, said means in radiation pyrometer closing said opening from the close o? radiations passing to said pyrometer de vices during the cooling down period and to open , opening intermediate the pyrometer device and " the shutter means during heating up period. atmosphere, a shutter element disposed in said the interior of the chamber.- solenoid actuated means te move the shutter to shut and open poti- '> WW NH NH MN MW 7 ' ‘ LEWIS RUMFQRD, 11.