US1159371A - Garbage-destructor. - Google Patents

Description

P. W. FOSTER.

GARBAGE DESTRUCTOR. APPLICATION FILED MAR. 17, 1914.

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, 34 ATTORNEW.

specification. or

application filed Ear up concern t L, FELL W. Fears-11:, wnited States, residing at the county and oi N cted certain new and "s in Garbage-Destrr" lowing is a full, clear,

con erned 421 means for the better a s i a M Mi. tion can pffit ctiuii or such appai wl in these destructors v shi-*ting grate which is A iidrawn to dump a charge or hot clinker into a cooling chamber, that the ir blast which is usually forced up through the mass of incandescent clinker for the purpose of cooling the same and providing a forced draft for the ignition and combos tion of a fresh charge of combustible material, reaches the furnace chamber for a short time, at least, at too high a temperature, is ,liable to injure the grate and develop too great a heat within the device and is sometimes impeded by the mass of clinker.

One of the objects of my invention is to avoid these objections, for which purpose l provide a series of fuses or boxes forming the side walls of the clinker cooling chamher and constituting paths .by which the air supplied for cooling the clinker an promoting combustion is conveyed around and not through the body of hot clinker and distributed over the same in the so e under the grate bars. in this way the while highly heated, is not raised to a jectionably high temperature, as w by passing directly through the incan clicker, is not deprived to the same or its combustion supporting properties, is always free to reach the grate bars throngs unobstructed passages, which is not t e case when it is forced through the bed of cli liter, which be more or lesssolid and impervious.

"her defect in these destructors l have be the result of the stoppa e of'the air circulation through the curb or lining of the fire box, when the operation of the device 1S interrupted and the fires banked, Un a ordinary conditions, the fore box l V is protected by passing through tee sistsin securing the castings of the cure 5 {,0 support the combos-- e of material, but when fire then suilicient to burn the cu b of the furnace. m

o l have provided tie ranches, one leading to the cl r the other to the on tnat fire is bank-ed the the curb may be maintained with nishing: air to the fire.

,er improvements in the construction oi the device which I have devised have suited from experience and observation or" the operation of: destructors of this kind, For example, the sides of the curbs above and around the grate bars are made up 5 wardly and inwardly instead of outwar i inclined to facilitate the discharge of clinker when the grate is withdrawn, ant L-O prevent the arching of the clinker, whwith outwardly inclined curbs which so is- 'times' formed a skewback inducing the area,

was liable to occur.

Again, I may employ in the clinker ing chamber an inclined grate to receive the charges of clinker, and to retain the clinker $35 in position while cooling. in such case I use a hinged plate or lip which forms a stop for the clinkerwhen turned up, and a slide or chute for the discharge of the same, into a car or other receptacle, when turned down.

.inoiher improvement resides in forming open in the side walls of the hollow curb tnrough which a part of the air forced through these curbs may escape and impiupon the ends or upon such portions oi are liable to become overheated i, and still another improvement con.-

gether by through bo1ts,'the ends of wt c are extended on through the weld of the structor and provided with short which take up and compensate for any expansion of the bars that may result from the intense heat to which they are subjected.

These improvements are illustrated in the 1% accompanying drawing, in which i have shown in Figure 1 the destru'ctor in central vertical section; in Fig. 2 a detail of the curb construction; and in Fig. 3 a portion x the curb with the openings therein,

here employed, comprising a grab-bucket A, which brings charges of garbage and refuse to the device and delivers them into a chute I or hopper B. From this the material is allowed to drop through a hydraulically operated door (in into the fire box or combustion chamber D, in which it is ignited either by fuel or by the heat of the chamber itself.

' In the lower part of the combustion cham-' ber, immediately above the grate bars, is a hollow curb E, the inner walls of which incline upwardly and inwardly, that is to say, the curb is widest at the top, for the reasons above set forth. This curb forms a continuous passage for air or steam, and is provided with an inlet F from a fan or blower, of either hot or cold air or a source of steam, and an outlet G from the middle of its rear end which extends down into an air chamber II. From the latter there runs a passage K into the clinker cooling chamber, containing a valve L and a second passage M tp the outer air, containing also a valve N. i

I may use any form of clinker grate or hearth, but in this particular device I use an inclined grate O to receive the charges of clinker. At the bottom of such a grate I place a rotating flap or lip P, controlled by hand, which normally holds the clinker on the grate, but which, when turned down as shown in dotted lines, when the door R is opened, forms a chute over which the clinker slides from the grate into a car or other receptacle S. v

The charges-of material when practically burned out in the fire box are deposited by the withdrawal of the grate bars T in the form of a mass of clinker, onto the grate bars 0, and in previous forms of destructor the air for burning the next charge of material was forced up .from the space beneath the grate, through the mass of hot clinker to the grate bars T.

For reasons which I have above explained, this is objectionable, and I therefore provide along the walls of the clinker cooling chamber a series of boxes or flues V open to the space below the grate bars 0 and provided with a large number of holes W at their upper ends. The forced draft passes up through these boxes, is distributed by the holes into the space beneath the grate, gradually cooling the clinker, and then passes up through the fire. In this way the air is heated before it reaches the fire, while at the same time the walls of the clinker chamber are cooled and protected from injury.

The curb E is composed of sections of cast iron or steel, which are held together by through bolts Y, in the usual manner, but

the ends of these bolts extend outentirely through the walls of the destructor where they are-provided with nuts between which and the side wall or plates thereon are springs X which relieve the destructive temperature strains on the bolts.

i In Fig. 3' I,have shown in detail one of a number of openings Z,'which I provide in the curb or the passage from the same. Air or steam escapes through openings and improvements which I have above describedconstitute, I believe, the last step which makes for the economy and practicability of the destructor. Practicalexperience with the use of these devices has demonstrated their great value and importance.

What I claim is:

1. The combination with a furnace and its grate bars adapted for the destruction of garbage, of a hollow curb for the combustion chamber and passages leading to the outer air and to the space below the grate bars, whereby a circulation of air or steam may be maintained through the same and the fire, orthrough the same into the outer air, as set forth.

2. The combination in a garbage destructor with a combustion chamber, a movable grate and a clinker cooling chamber beneath the same, of a hollow curb for the combustion chamber, and passages from the same having branches leading to the outer air, and to the clinker chamber, as set forth.

3. In a garbagedestructor, the combination with. a combustion chamber, a clinker cooling chamber beneath the same adapted to receive the clinker discharged from the combustion chamber, and means for cooling the clinker and the walls of the clinker chamber and supplying air or steam to the grate bars of the combustion chamber, comprising a series of boxes or flues located said nuts and the walls to relieve the temperature strains on the bolts.

3 5. In a garbage destructor, the combination with a combustion chamber, a clinker cooling chamber beneath the same and a grate within 'the clinker chamber for receiving the clinker discharged from the combustion' chamber, of a series of boxes or flues located at the sides of the clinker grate and along the Walls of the clinker cooling chamber provided with an inlet opening below the clinker grate and outlet openings above the clinker grate whereby air or steam is conducted from beneath the clinker grate to the grate bars of the combustion chamber. 6. In a garbage destructor, the combination with a combustion chamber, a clinker cooling chamber beneath the same, a grate within the clinker chamber for receiving the clinker discharged from the combustion chamber, and means for cooling the Walls of the clinker chamber comprising a series of boxes or fiues located along the Walls of the 15 clinker cooling chamber provided with an inlet opening for air below the clinker grate and discharge openings therefor above the same.

In testimony whereof I afilx my signature 20 in the presence of two subscribing Witnesses.

PELL WILLIAM FOSTER.

Witnesses:

THoMAs J. BYRNE, JOHN J. BULLERD.

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