US919598A - Drying-furnace. - Google Patents

Description

J. 0. KUEBLEB.

DRYING FURNACE. APPLICATION FILED JAN. 4, 1909.

Patented Apr. 27, 1909.

a SHEETSSHEET 1.

Inventor:

w. 3 iti orney HOJL J. G. KUEBLER.

DRYING FURNACE.

APPLICATION TILED JAN. 4, 1909.

91 9,598. Patented Apr. 27, 1909.

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JOSEPH C. KUEBLER, -OF W'ELLSVILLE, NEW YORK.

' DRYING-FURNACE.

' Be it known thfit I, JosEPH C. KUEBLER, a citizen of the' nited States, residing at Wellsville, Allegany county, New York, have invented certain new and useful Improvements in Drying-Furnaces, of which the following is a specification.

This invention pertains to improvements in furnaces designed for the drying of granular materia'l, bonedust as a mere example, the main object being to produce an ap aratus in which metal parts are kept out ol contact with the rhore intense heat employed in the dryin operation, and. the invention will be readi y understood from the following description taken in connection with the accompanying drawings in which Figure 1.is a vertical section of a furnace embodying my invention: Fig. 2 a front elevation of the lower portion thereof: Fig. 3 a horizontal section through the feed chamber: Fig. 4 a side. elevation'of the" feeding mechanism: and Fig. 5a transverse section,

on an enlarged scale, of the feeder.,

In the drawings :1, indicates the body of" the furnace, which is constructed of refractory material, as fire brick: 2, piers or legs supporting the same: 3, the combustion chamber: 4, the rearwardly inclined floor of 30 the combustion chamber: 5, a delivery trough extending across the combustion chamber at the base of the sloping floor thereof: 6, a series of gas burners disposed in the lowermost portion of the combustion chamber, the flames of these burners being delivered at some distance up from the base of the combustion chamber, the illustration showing these burners as having their pipe Work 'enterin the furnace through the medrum of the elivery trough 5: 7, the mixers of the burners: 8, the feed chamber formed within the furnace over the combustion chamber: 9,- a rearwardly'declining floor' for the feed chamber: 10, a slot extending from the lowermost portion of the feed chamber down into the combustion chamber at a V point over the highest portion of the sloping oor of the latter: 11, a flue leading from the 'feed chamber: 12, a supply hopper disposed over the feed chamber: 13, a feed trough disposed within the feed chamber and under the feed hopper: 14, a series of nozzles in the disposed under'the floor of the feed trough floor of the feed hopper, these nozzles leading to the feed trough: 15, longitudinal slots in the floor of the feed trough: 16, a rock-shaft livery trough Patented April 27, 1909.-

and having diametrical slots to coincide with the slots 15, this shaft fitting up in a semicircular recess in the lower surface of the floor of the feed trough so as to be capable of acting valve-like. on ,slots 15: 17, an arm on u an end of shaft -16 projecting outwardly beyond a side of the furnace: 18, a crank shaft disposed parallel with feed shaft 16: 19, .a combined pulley and crank mounted on the crank-shaft '18: 20, a rod 7 connecting the j crank with arm 17, the connection of the rod with arm 17 being such as to permit of adj ustment ofthe connecting point closer to or further from the center of rock-shaft 16: 21, a turnbuckle in rod 20, to ermit of adjust-. ing the length of that ro 22, a receiving trough disposed below the furnace: 123, aseries of conducting tubes .leadin from de- 5. to receiving trough 22: 24, a pair of secondary receiving troughs disposed one on each side and below the level of trough 22: 25, outlet o'rts in the bases of the outer walls of secon ary receiving troughs 24: 26, gates by which the outflow through these ports may be controlled: 27, a dust pocket disposed below each of ports 25 in position to receive material flowing thereom: 28, a sloping screen placed over the top of each of the dust pockets: and 29, conducting tubes leading from receiving trough 22 to the secondary trough 24.

Assume the gas burners to be in o eration and that the furnace is hot and t at hot gases are p assin through the combustion chamber and fee chamber, the gases in the latter chamber being comparativel cool so that the metal therein is not liab e to destruction. The material to be dried is-kept supplied in supply-hopper 12 and tends to flow out through the nozzles, the material lying on the floor of the hopper becoming more or less dried by contact with the bottom of the hopper. The material flows into feed trough 13' and seeks to drop therefrom through the slots in the floor of the feedtrough andin the rock shaft.

The rock-shaft can manifestly occupy an angular position completely reventing the; flow through the slots lor, on t e other hand, it nia occu an angu ar 'osition permitting full fl dw thl diigh'the slotls or the slots may artially 0 en. The crank operated mec anism oscil ates the shaft S(L as to bring about, at each turn'of the crank, a more or less free 0 ening for the downward flow of the materlal, and the adjustment of the length of the rod and of the effective radius of arm 17 determines the degree to which the slots will be 0 cried and, to some extent, the time during w 'ch a given degree of opening will be maintained. The result is thatfthe uantity of material delivered into the feed 0 amber may be regulated, and the intermittency of flow, due to the rocking .of the shaft has the effect of drop ing a succession ofmasses 'to the sloping oorof the feed chamber; p

The sloping floor 9 of the feed chamber is hotand the material dropped upon 'itfrom the feed trough slides down and leaves the feed chamber through slot 10, and as the ma terial passes through slot 10 it passes throughan ascending column of hot gases on their way from' the combustion chamber to the.

feed chamber. Owing to the intermittency of the dropping of the material from the feed trough there may be a 'more complete exposure of the material to the hot gases than would be the case ifthe flow were continuous. The result is that the material reaches the combustion chamber 3 in a more or less dried condition. a

The combustion chamber 3 has itsfloor very hot, and. the' material fallingfrom the feed chamber through slot 10 slides down the hot floor of the combustion chamber and becomes thoroughlv dried by reason of contactis desirable to intercept, the material flowing from the gated ports isallowed to flow down over the screens 28, the dust or fine material going to the dust pockets, while the coarser material flowsofi of the screens and into the cans or other vessels. tion is not desiredthen' the screens'may be covered.

I claim:'

If the screening ac- 1'. A drying'furnace comprising, a chamber having a sloping floor, a su ply hopper thereover, outlets at the base 0 the hopper and over the higheriv portion of said floor, a slotted rock-shaft cooperating with the outlet and controlling the flow of material therefrom, mechanism for rocking said shaft, heating mechanism for maintaining heated gaseswithin said chamber, and an outlet from the base of said chamber, combined substantially as set forth. 1

2. A drying furnace com rising, up er and lower chambers connecte j with eac other and having sloping floors, gas burners in the base of the lower chamber, a 'flue leading from the upper chamber, means for delivering material upon the higher 'ortion of the upper floor, and an outlet for t e material at bined substantially as set forth. I

3. A drying furnace 1 comprising, a; drying chamber having an outlet for the dried material, a receiving trough disposed below said 70. the lower portlon of the lower floor, coinchambers, conductors leading from said oiitlet to said trough, secondary troughs provided with outlet ports and gates, conductors leading from said receiving trough to the secondary troughs, dust pockets below the ports in the secondary troughs, andinclined screens over said gockets and in the path (if ports, combined material flowing om said substantially as set forth. a

JOSEPH C. KUEBLER.

Witnesses:- V MICHAEL EDWARDS.v

E. M. LYONS.

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