US1401224A - Breeze-arrester and the like - Google Patents

Description

E. C. WOODIN.

BREEZE ARRESTER AND THE LIKE.

APPLICATION FILED SEPT. 21, 1920.

1,401,224. l Patente'd Dec. 2 7, 1921.

dust particles.

Parana ERNEST C. WOODIN, OF CHCAGO, LLNOIS.

BREEZE-aannemen ann man man.

To @ZZ whom t may concern.'

Be it known that I, ERNEST C. 1SNoonrn, a citizen of the United States, residing at Chicago, in the county of Cool; and State oi illinois, have invented certain new and use ful Improvements in Breeze-Arresters and thelike, of which the following is a speciiication.

The'present invention has to do with certain improvements in breeze arresters and the like-that is, devices for catching dust and coke breeze and the like delivered from water'gas or carbureted water gas machines. In the operation of gas works and many other industrial plants, dust or breeze is discharged from the gas producing chine and fouls the air oi the neighborhood. This material eventually finds its way to the ground and to neighboring structures which thereby become fouled, and, as a result, the operation of plants of this type is frequently a public nuisance.

Many arrangements have Abeen devised in the past with the object of arresting and ooh lecting this dust or breeze, not only 'for the purpose of overcoming the public objection to the operation oi th-e'plant, but also for the purpose of making it possible to use this material in industrial processes. As iar as l am aware, however, practically all such previous constructions have been open to certain objections or difficulties -in operation, because of the fact that they were not properly designed to facilitate the'collection oi the dust or breeze by properly taking into account the effect of the gas currents on the movement of the individual Many of these particles, and, in some plants, practically all of these particles, are of such size thatr their movements will be controlled not only by the cur rents of gas, but also by the principles of rebound of discreet particles, from the deiiecting surface.

@ne ot the objects of the invention is to provide a collector which' will insure a proper delivery of the particles into a tanlr or receiver. While, at the same time, permitting a ,free delivery of the gas from the chimney or stack which is delivering the b`reeze. Another object is to so Narrange the walls or surfaces yof the collecting and conveying Vtubes that the dust or breeze particles will be enabled to rebound from surface to surface, While, at the same time,

Specification of Letters atent.

Patented Bec. 27, 1921.

Application filed September 27, 1920. Serial No. 413,251.

maintaining their general direction of travel toward the receiving or collecting tank.

@ther objects and uses ot the invention will appearironi a detaiied description of the saine which consists in the features oi' construction a-nd combinations or" parts hereinafter described and claimed.

In the drawing:

lFigure l shows, in elevation, the general arrangement or" the stach and dust or breeze arrester; and I Fig. 2 shows, in enlarged detail, the dust arrester itself.

rEhe chimney or stack is designatedby the numeral 8. Urdinarily its upper end e is lett clear and unobstructed, or, it some type oi dust catcheris provided, the same does not permitoij a free delivery oit the from the top end of the stack, while, at Y the same time, making proper provisionfor the collection ci the dust and breeze.

in lcarrying into effect the principles of the present invention, l `provide a conical hood or the like 5 which l mount above the upper end oi' the stach, the lower edge 6 of said hood being spaced a suitable distance above the upper edge ot the stack to provide a clear opening i" through which the gas is discharged into the atmosphere. rihe hood 5 may be supported in a desired position by means of plates 8 secured to the hood and to the stack.

rhe hood 5 being conical in torni is constantly contracted or diminished in diameter until, at its upper'end 9, it taires sul stantially the diameter oi the discharge pipe l0. This discharge pipe bends back and Ldown to the point il where it, in turn, is still further contracted by a conical connection l2 having a sleeve i3 on its lower end. rihis sleeve worlzsireely within a sociret le on the upper. end of the breeze pipe 15, the lower end of the breeze pipe extending down into a breeze pocket 16, wherein dustfand breezU is collected.

Most of the gas is discharged into the atmosphere from the opening 7 but, in order to permit the travel of a current of gas through the conical arrester 5 and pipe 10, I have provided a revent 17 on the pipe lO anda revent 18 from the dust pocket 16.

As the gas ascends through the stack 3 at high velocity, the dust and breeze particles will, be thrown against the inner and under surface ci the conical' hood. Each particle so delivered will immediatelyV rebound in accordance with the laws of reiection, so that the angle Vof deiiection will be equal tothe angle of incidence.V l have shown by the dotted lines. l'the path of travel of a particle of dust or breeze. lllhen the same strikes against the inner surface of the hoodon one side, it is. deflected olf at an angle equal to' its angle of incidence and will immediately afterward strike the other side of the inner surface of the hood. Here again it will be deidected at an angle of deflection equal to the angle of incidence.` 1n order toinsure that this dust particle will lind its way into the'pipe l0, it is desirable that no matter how many such strikings and reboundings may take place, each particle will be able to eventually find its way without the necessity of having recourse to a'strong gas current, into the pipe l0. It is evident that if the conical hood be constructed with a surface too nearly approximating the horizontal, itrwill be im* possible for the'dust particles to find their way into the pipe 10. @n the other hand, if the conical surface be formed on an angle very nearly approximating the vertical, it will be evident that thek dust particles will very easily iind their way into the discharge pipe. 1 have ascertained the fact that if the surface of the cone be so formed that its .elevation has a completecone is equal to about 2.75 times one-half the .dia-meter of its base, orfif said elevation be greaterrthan its amount,` it will be theoretically possible for all of the dust particles traveling straight up the stack to be discharged into the pipe l0 simply by rebounding` from surface to surface of the interior ofthe conical hood, and without even the necessity7 of using a gas current to assist their move ments. Therefore, 'ity is desirable, in every case, to form the conical hoeden such an angle that the theoretical difference in eleand 18, there will be a certain flow of gas.

vation between any two rings on its surface shall berequal to about 2.75 times the difference in radius of said rings. Y

` All ofthe material delivered` around the Y bend l0 of the Vdischarge pipe will find its way by gravity into the pocket 16. Owing to thepresence of the revent connections 17 through the pipe "l0 which will assist in car rying the dust and breeze particlesraway from the hood, but, in ordervto insure a proper delivery of said particles, it is de* sirable to use the principle hereinbefore eX- plained regarding` the angle on'which the conical hood should be formeel.

`While 1 have in the foregoingedescription explained the application ofthe principles in regard tothe rebounding of the dust and breeze particles as applied to a conical lhood-#that is', a hood of circular crossV sec-V ti'o'in Aat every elevationf-fstill wishitv to be l .pose set forth.

As a simple illustrationrof'one applica` tion of the principlesoffthis invention 1 will mention the following example7 but l wish it distinctlyunderstood that in; giving Y Y this example l do not thereby limit myself to the sizes norV proportions of parts` men# tioned. W ith a stack 42 inches in diameter',

the diameter of the lower edge of thehood may bemade 48 inches, whichwill give a 3-inch-overhang of the hood all the way around. The lower edge ofthe hood may be spaced from the upper edgeV of the stack 10 inches, so asto give a lO-inch opening for the discharge of gas.V The opening atthe Y upper Vend of the hood may be made 12 inches in diameteigwvhich` will be the size ofthe discharge pipe 10,r Under these conchtions the totalheight of the cone of the hood would be 66 inches, but in view ofthe fact that the discharge pipe 10 is connected into` the hood at a pointY where the same lhas a Vdiameter of l2 vincheslit4 follows" that the height of the coneup to lthis point is49-35 inchesv With 'theseD dimensions the device will be found to operate admirably., and will effectively deliver. the dust or breeze particles on the principle of rebounding. K

l'. claim: .f

l. rEhe combination with a circular stack, of a breeze arrester comprising a continuous conical hood having the angle of itswalls at least GOO from the horizontal and nnperforated, the base ofthe. hoodbeing atleast as great in Vdiameteras the diameter of the staclnV means for supporting the hood above the stach and in alinement therewith and with its' lower edge spaced above-the'upperedgeof the stach to provide a clear opening for the discharge of gas from the stack into the atmosphere without reversal of direc-f tiony a discharge pipe connected-to the upper endof the hood centrally thereof, said discharge pipe having a diameter adjacent to the hood at least one-fifth the diameter of the stack, there being no shoulder facingl against theupward flow of material at'th'c point ofconnection of the Vdischarge pipe withl the hood, and thererbeing yno `direct connection from' the'V stach to the discharge connection9 substantially as and forV the pur- 2. @hecombination'with a stack, of

breeze arrester comprising a continuous hood having the angle of its Walls at least 60O from thevhorizontal and unperforated, said hood having its lower end of a size and. perimeter to overlie the upper edge of the stack at every point, means for supporting the hood above the stack and in alinement therewith and with its lower edge spacedv .out reversal of direction, a discharge pipe connected to the upper end of the hood centrally thereof, said discharge pipe having a size adjacent to the hood at least one-fifth the linear dimension of the stack measured in the same direction, there being no shoulder acing against the upward How of material at the point of connection of the discharge pipe with the hood, and there being no direct connection from the stack to the discharge connection, substantially as and for the purpose set forth.

ERNEST C. WOODIN.

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