US1858683A - Round tuyere for furnaces - Google Patents

Description

May 17, 1932. c. J. PARKER I ROUND TUYIELRE. FOR FURNACES Filed May 16, 1927 2 Sheets-Sheet 1 May 17, 1932. c. JQPARKE'R 1,853,683

ROUND TUYERE FOR' FURNACES Filed May 16. 192' 2 Sheets-Sheet 2 2; JAM/EN TU/=' Patented May 17, 1932 UNITED STATES PATENT OFFICE CYRUS J. PARKER, OF PORTLAND, OREGON; MARY E, PARKER, EXEC'U'TRIX OF SAID CYRUS J. PARKER, DECEASED, ASSIGNOR TO IRON FIREARM MANUFACTURING CO]!- PAN Y, OF PORTLAND, OREGON, A CORPORATION ROUND TUYERIEi FOR FURNACES Application filed May 16, 1927. Serial No. 191,606.

est blast during the early stages of combustion and the lightest blast when the fuef is almost entirely consumed.

The second object is to provide the maximum amount of air to the combustion without danger of carrying over incompletely burned particles of fuel with the blast.

I The third object is to so completely burn the fuel that there will be practically an entire elimination of soot or smoke.

The fourth object is to so construct the tuyeres that they will develop an intense heat sufiicient to fuse the incombustibles into an easily removable clinker which is worked up on top of the burning coals by the oncoming fuel.

The fifth object is to so construct the tuyeres that they can be easily installed in various sizes of furnaces and permit the use of encircling fire brick which protect the interior of the furnace from the direct blast of the tuyeres.

These, and other objects, will become more apparent from the specification following as illustrated in the accompanying drawings, in which:

Figure 1 is a vertical section through the circular fire pot and the lower portion of a furnace taken along the line 1'1 in Figure 2 and also breaking away a portion of the hopper to show the parts behind same. Figure 2 is a partial plan view and horizontal section taken along the line 22 in Figure 1. Figure 3 is a perspective view of a single tuyere. Figure 4 is a vertical section through the fire box of the furnace taken perpendicularly to Figure 1 and showing the fuel bed and its relation tothe tuyeres.

Similar numbers of reference refer to similar parts throughout the several views.

Referring in detail to the drawings, in order to illustrate this invention there is shown the outer casing 10 and the inner wall 11 of a furnace which is set on the base ring 12. Within the inner wall 11 and resting on the floor 13 is a hopper 14 through which coal is fed upwardly by the screw 15 in any convenient manner. Around the hopper 14 is a wall 16 whose upper edge 17 is inturned to the level. of the top of the hopper 14, leaving an opening between same for the upward passage of air through the air passage 18.

The three tuyeres are arranged to form the walls of a circular fire pot whose inner wall 19 converges downwardly to correspond with the discharge opening of the hopper 14. The outer wall '20 of each tuyereis vertical and has formed therein a groove 21 adapted to receive a curved supporting plate 22 sufficiently narrow to permit easy assembling and having formed at the ends thereof the pockets 23 through whose sides are passed the bolts 24.

The plates 22 have a double function, first to hold the tuyere sections together and second to support the fire brick lining 25 which projects somewhat above the top 26 of the tuyeres. In the top 26 is formed a channel 27 provided with a raised cover 28 having inwardly facing openings 29 which are somewhat larger than the outwardly facing openings 30.

Across the'bottom of each tuyere is formed a floor 31"i'iaving a" downturned flange 32 near whose ends are formed the inwardly projecting lugs 33 which engage the rim 34 of the hopper 14. Q

Between the flange 32 and the wall 19 is 20 ing process.

50 gether.

wardly directed blast of somewhat less volume and pressure is directed against same, as indicated by the arrows 43;

It must be borne in mind ing of the fuel nears completion it rapidly loses weight and as it is gradually worked over the cover 28, which is the highest point of the tuyere, it falls into the circular channel 44 just inside of the fire bricks where the softest blast of air completes the burn- The intense heat generated by the combustion melts the incombustibles into curved clinkers following the general shape of the tuyere, which clinkers are always on top of the-fuel bed from which they can be 25 easily removed bysuitable tongs.

Where furnaces of greater dimensions are encountered it is only necessary to use a plate 22 oil greater width which will sustain larger or more fire brick 25 to fill in the space be- I tween the wall 20 and the wall 11.

I am aware that many forms of tuyeres have been constructed in the past; I therefore do not claim same broadly but I do intend to cover all such forms and modifications thereof as fall fairly within the following claims I claim:

1. A fire pot for underfeed stokers consisting of a plurality of hollow curved tuyre 40 sections joined .in circular form having a groove formed around the outer side of same,

each section having a main chamber and an auxlliary chamber communicating therewith, said main chamber having inlet and outlet openings, said auxiliary chamber having unegual outlet openings on opposite sldes there 0 an annular sectional late havin its inner edge lying within sai groove, an means for clamping the sections of, said plate to- 2. A hollow arcuate tuyere member having a main air chamber and an auxiliary air chamber in communication therewith through a plurality of openings, said member being adapted to form a section of an underfe stoker retort, with said auxiliary chamber above the main chamber, said lower chamber havmg an air outlet opening into the retort, said upper chamber having outlet 0 enings exceeding the area of the openings etween said chambers.

3. A hollow arcuate tuyere member having a main air chamber and an auxiliary air chamber in communication therewith bl through a plurality of passages, said memthat as the burn-' ber being adapted to form a section of an underfed stoker retort, with said auxiliary chamber above the main chamber, said lower chamber having outlet openings through fuel-engaging side, said upper chamber having outlet openings on opposite sides thereof discharging toward and away from the cen ter of the retort, the outwardly pointing openings having less area than do the corresponding inwardly pointing openings, the area of the combined lower chamber outlets and the area of the combined upper chamber outlets each exceeding the area of the com bined passages between the upper and lower chambers.

4. A hollow arcuate tuyere memberhaving a main air chamber and an auxiliary air chamber in communication therewith, said member being adapted to form a section of an underfed stoker retort, with said auxiliary ch amber above the main chamber, said arcuate member having an uprightouter wall, a sloping inner wall and horizontal top, bottom and dividing members, said dividing member separating the main air chamber from the auxiliary air chamber, said main chamber having horizontal slots through said sloping wall near said dividing member, said auxi'liary chamber having horizontal slots through the inner and outer sides thereof above said dividing member, said dividing; member having openings therein which are less in total area than either the lower chamber outlets or the upper chamber outlets.

CYRUS J. PARKER.

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