US1485821A - Coke-oven gas-burner nozzle - Google Patents

Description

W. H. WRIGHT- 3 5% W attorney;

March 4, 192- 2 coma OVEN GAS BURNER NOZZLE Filed Dec. 20, 1919 Patented Mar. 4, I924.

QWETEE STATiFld hdtSfiZi @ATENT EVILLIAM H. WRIGHT, OF CHICAGO, ILLINOIS, ASSIGNOR TO LOUIS WILPUTTE, OF NEW ROCHELLE, NEW YORK.

COKE-OVEN GAS-BURNER NOZZLE.

Application filed December 20, 1919.

To all whom it may concern:

Be it known that I, VVILLIAM H. lVniGHr, a citizen of the United States, and resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Coke-Oven Gas-Burner Nozzles, of which the following is a specification.

The object of my invention is to provide an improved form of gas burner nozzle suitable for use as a burner nozzle in a vertical flued retort coke oven and of a novel shape which't'acilitates its production with a gas measuring orifice of the proper size and facilitates the removal of carbon deposits which at times clog the nozzle and reduces the liability of nozzle breakage in the cleaning operation.

The various features of novelty which' characterize my invention are pointed out with particularity in the claims annexed to and forming a part of this specification. For a better understanding of my invention, however, and the advantages possessed by it, reference should be had to the accompanying drawings and descriptive matter in which I have illustrated and described the best form of my invention now known to me.

Of the drawings:

Fig. l is a partial sectional elevation of a coke oven.

Fig. 2 is a partial section taken at right angles to Fig. l; and

Fig. 3 is a section taken similarly to F 2, but on a larger scale and showing a portion only of the apparatus shown in Fig. 2.

In the drawings I have illustrated the use of my improved nozzle arrangement in a retort coke oven in which the horizontally elongated coking chambers A are separated by heating walls provided with vertical heating flues B connected at their upper ends by a horizontal passage C. Air inlet passages E lead to the lower ends 01" the different flues B from regenerator chambers F beneath the coking chamber A, and gas supply channels G lead into the lower ends of the fines B from the gas supply conduits I. Each gas channel I supplies gas to a plurality of flues B. In ordinary practice the fiues B in each heating wall at one side of the central fiow reversal plane in the well-known type of Serial No. 346,354.

coke oven illustrated receive their gas from i the same channel I which is supplied with gas through a gas gun inserted into the open outer end of the channel. The distribution of gas from each gas supply conduit I among the various flues B supplied by it, is regulated by means of removable gas burner nozzles I-I seated one in. the lower end of each channel. G. The gas nozzles H may be cleaned and renewed from time to time as the conditions of operation make necessary by means of rods passed down into the tines B and passages I) from the top of the oven through passages B formed in the upper portion of the oven structure in alignment with the flue passages B and normaliy closed at their upper ends by the covers B Each gas nozzle H which is ordinarily niadc oi fire clay, is termed with an axial gas passage comprising a short restricted portion H at its upper end and a lower body portion H of substantially larger diameter. The walls of the passage portions H and II? are connected by the abrupt shoulder portion H The special shape of the gas passages through the nozzles H possesses important practical advantages. The primary function of the gas nozzles is to serve as gas measuring devices In order to: obtain a desirable heat regulation, the fuel gas must be properly distributed to the different combustion flues B. This requires a graduation in the sizes of the orifices in the different nozzles H for each heating wall. So important is this, that in present actual practice, the diameters of the gas nozzle passages are measured in hundredths of an inch. With the new nozzle the measuring orifice is not the entire gas passage through the nozzle but only the restricted portion H, and it is, of course, easier to obtain nozzle orifices of the proper size than 'is the case when the nozzle passage is cylindrical throughout or is slightly conical as has heretofore been the practice. In some cases it is necessary to ream out the nozzle orifices to get the proper size and the reaming operation is obviously simplified with the new nozzle construction.

The new nozzle construction is of especial value on account of the ease with which it may be cleaned when carbon deposits make this necessary.

In the operation of an oven of the type illustrated there is a tendency for the gas passages, and particularly the passages in the gas nozzles H .to become clogged by carbon formed by decomposition or cracking or the hydrocarbon fuel gases supplied to the channels I, and depositing in dense compact masses on the walls of the gas passages. The extent to which carbon thus .tends to deposit in, and clog the gas passages depends upon operating conditions. While under some conditions the tendency is not very great it is always necessary to guard against the possibility of serious trouble from this cause. The portion of the passages which are most apt to clog are the bores of the gas nozzles H and these are the passages which it is most important to keep clean.

When the channel through a nozzle H becomes obstructed an iron rod is passed down through the corresponding passage '3 and line B and an attempt is made to poke out the obstruction. If this is unsuccessful or the nozzle H is broken as is frequently the case, with the nozzles heretofore used, the nozzle is removed and a new one put in place by an implement or implements inserted through the passages B and ilue B.

With the special nozzle construction illustrated the tendency is for clogging afiecting gas distribution to be confined to the v 9 i I I restricted orifice portion H OI each nozzle bore, both because it is the most restricted portion of the bore and because it is at the upper and hottest end of the nozzle. With the clogging carbon concentrated in the portion H of the bore of a nozzle, it is substantially easier to poke out the carbon or a considerable portion thereof than would be the case if the nozzle bore were of the same general cross section along its length, both because of the shorter length of the bore to be thus cleaned and because the carbon poked out of the orifice portion H can fall freely through the much larger portion Htof the nozzle bore into the channel I from which the carbon may readily be removed usually by burning it out; air for this purpose being admitted to the channels I from time to time in accordance with well-known practice.

The greater ease with which the new nozzle may be cleaned is not only directly advantageous but also tends to reduce nozzle breakage.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is:

l. A coke oven burner nozzle made of fire clay formed with a gas passage comprising a short upper measuring orifice portion and a body portion of substantially greater cross-sectional area than said orifice portion. 7

2. In a coke oven having vertical heating fines, gas channels connected to the lower ends of the fines, and passages in the oven root registering with said fines, the improvement which consists in fire claiy burner nozzles seated in said gas passages and adapted to be inserted, replaced and cleaned through said roof passages, and formed each with a gas passage comprising a short upper measuring orifice portion and a remaining portion substantially larger in cross section than said orifice portion.

Signed at Chicago, in the county o1 Cook and State of Illinois, this 16th day of De-- cember, A. D. 1919.

WILLIAM H. WRIGHT.

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