US1565747A - Side-wall tuyere - Google Patents

Description

DEC. 15,

c.,F. MILLER sm: WALL TuYtns Filed April 2. 1923 INVENTOR ATTORNEY oril iiig Patented Deer 15, 1925.

UNITED STATE1 CHAIR/LES 1?. minute, or MOORE, PENNSYLVANIA, nssreno'n To wnsmienbusn ELECTRIC AND ieANUrnc-rnniiie COMPANY.

SIDE-WALL TUYiinn.

Application filed April 2,

To all whom it may concern:

Be it known that I, CHARLES F. MILLER, a citizen of the United States, and a resident of Moore, in the county of, Delaware and State of Pennsylvania, have invented new and useful Improvement in Side-Nail liuyere, of which the following is a specification.

This invention relates to tuyere plates of the character employed in high temperature furnaces, and'particularly to side Wall aircooled tuyere plates for such furnaces and it has for an object to provide a tuyere plate of the character designated which shall have heat dissipating surfaces greatly in excess of its heat absorbing surfaces, and which shall have increased strength to resist distortion due to excessive and uneven heating. It is a further object of my invention to provide a metal tuycre plate presenting a highly refractory inner surface to the furnace, and provided 011 the outer side with strips of steel embedded in the metal and serving to assist in the dissipation of the heat absorbed by the plate and also serving to reinforce the plate against distortion or warping.

These and other objects of my invention, which are made more manifest in the further description thereof, may be attained by the employment of apparatus illustrated in the accompanying drawing in which: Fig. 1 is a view in vertical section through a furnace side wall tuyere embodying the present invention; Fig. 2 is a View in elevation of a side wall tuyere plate; and Fig. 3 is a fragmentary View in transverse section of the tuyere plate.

In the drawing I show a side wall tuyere plate 10 mounted on a bracket 11 which is supported on the wall air box 12 of a conventional stoker furnace.

The tuyere plate 10 is preferably constructed of cast iron and provided with a receding edge flange 14:, forming a seat ror an adjacent tuyere plate, a base lug 15 and a top hook 16, each engaging the bracket 11 to retain the plate in position.

In casting the tuyere plate 10, steel strips 18, which are relatively thin and substantially equal in length of the tuyere are arranged in parallel spaced relation in the mould in such manner that, when the molten iron is poured, the steel strips are partially embedded in the tuyere plate. The major portion of each of the steel plates, however,

1921;. Serial N5. 629,538.

prcfe ably protrudes beyond the surface of the casting. The niu'nbcr of the steel strips and the extent of their protruding surfaces may be equal to two or three times the plane heat absorbing surface of the exposed face of the tuyere. The tuyere plates are perforated, as at between the i i icing steel strips, the perforation being preferably formed by the provision of cores in the mould at time of casting.

The high maintenance cost of high duty furnaces is large; due to iii-ct for frequent replacement of burned out and distorted parts. Tuycrc plates are more frequently removed than other parts of the furnace and side wall tuycres are subjected to extreme heats both from incandescent coal and highly heated furnace gases. From the foregoing, it is apparent that a tuyel'e plate having a longer life than those at the present time employed is provided. The

greatly increased heat dissipating area of the present tuyere, and the reinforcement of the plate against distortion because of the many steel beams embedded in the plate, contribute to produce a plate which has a longer life and which is more economical in the long run than similar tuycre plates as at present constructed.

While I have shown my invention in but one form, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various other changes and modifications, without departing from the spirit thereof, and I desire, therefore, that only such limitations shall be placed thereupon as are imposed by the prior art or as are specifically set forth in the appended claims.

lVhat I claim is:

1. A side wall tuyere for stokerfurnaces comprising a ierforated. metal plate and a plurality of steel strips partially embedded in the metal plate and partially protruding from the plate.

2. A side wall tuyere comprising a perforated cast iron plate, and a plurality of steel strips partially embedded in the cast iron plate and partially protruding from a face of the plate.

A side wall tuyere comprising a perforated cast iron plate, and a plurality of relatively thin steel strips partially embedded in the iron plate and partially protruding from a face of the plate.

4. A side wall tuyere comprising a perfo- A late, said plate 25 between the stoker furnaces (rust H'Oil plate for exposure to 30 sgiosed ed zipted the furnace and the other r'lions: Y'

=1 .vingg one HUlQ ad perfo trips. A side will $1 eel s vmnprising Mfr ling from a (ace 0; the p 0 and a w rotrud XI] for slol *r 1 each strip p side wall tuyere rated cast iron plat thin steel strips each hzwin portion 0 55 ml "he pl te. 5. i; eunlpri side ded in 'mrtiallv embed arcnzlly pr rri'uhng from :ipted for exposure 35 exure to cool air, and a pluwasting ad e, and u plustrips &1 of the trip proside 40 Me hav- '-e 'l for exposure to the ir. a pluralembedded em the side .ipe m-e to air.

was? iron i 1210 and the ol me this 29th (luv 0: ldnrvh.

HARLEF; F. MILLER.

are l lurul- 'mrnzures furnaces and :1 p Hee 1p pr0- for sf lie heigh up i j 1 lat an the (led in the metal of iron , I t 3 embed vortion 01? each qt] y 19 plate, the

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