US1541337A - Cinder precipitator - Google Patents

Description

June 9, 1925. 1,541,337

E. FElX CINDER PRECIP ITATOR Filed Oct. 18, 1924 ENVENTOR Emaf W dam/ ATTORNEY Patented June 9, 1925.

UNITED STATES PATENT OFFICE.

ERNST FEIX, OF TACOMA, WASHINGTON.

CINDER PREGIPITATOR.

Application filed. October 18, 1924. Serial Iva 744,460.

Washington, have invented certain useful Improvements in Cinder Precipitators, of which the following is a specification.

My invention relates to improvements in cinder precipitators and the object of my invention is to provide a centrifugal cinder precipitator of simple and substantial construction that is unusually eflicient in operation and in which the back pressure against the smoke laden air which is drawn by mechanical means, such as a fan, from the fire and discharge into the cinder precipitator for the purpose of clearing the air from the cinders and heavy smoke beforedischarging into the atmosphere is reduced to an absolute minimum thereby resulting in a saving of power.

A further object is to provide a cinder precipitator having a centrally arranged air discharge passageway and having at the bottom of said air discharge passageway a plurality of radially disposed vanes arranged to catch the air and direct the same out through the air discharge passageway with the least possible agitation of the air and with the least possible back pressure against the fan that drives such air, said vanes having outer edges that are inclined to conform substantially to the line or cone which marks the division between the air that is laden with solid. matter and the cleaner air.

Further objects are to provide an inclined or conical plate forming a support at the bottom of the deflectors and arranged so that solid matter will not lodge thereon andto provide means for catching and discharging the moisture that enters the precipitator through the centrally arranged air discharge passageway. I V Other and more specific objects will be apparent from the following description taken in connection with the accompanying drawings. 7

Precipitators of this nature are necessarily required to handle a large volume of'air or gas at comparatively high speed in the smallest possible space and must be capable of removing practically all cinders sootand solid matter and of dissi ating' or breaking up the smoke so that it Will not be objectiom able in congested districts. The foul air or by-products of combustion are usually driven to these precipitators by a fan and it is well known that the efficiency of a fan decreases very rapidly as back pressure against said fan or against the column of air that is driven by the fan is increased. For this reason it becomes a problem of great importance in the construction of precipitators of this nature to keep back pressure within the precipitator and against the fan down to a minimum. In the design of this invention every possible precaution has been taken to reduce'back pressure to an absolute minimum.

In the drawings Figure 1 is a view in vertical mid section of a cinder precipitator constructed in accordance with my invention.

Fig. 2 is a view in cross section of the same substantially on broken line 22 of Fig. 1. i

Referring to the drawings, throughout which like reference numerals designate like parts, I show a cinder precipitator comprising a cylindrical section or drum 5 having a conical bottom end 6 terminating in a relatively small outlet 7 for solid matter.

The cylindrical section 5 is provided with a relatively flat frustro-conical shaped top wall that supports a relatively large axially arranged air discharge pipe or conduit 10 that extends downwardly into the cylindrical drum 5 slightly more than half the distance from the top to the bottom of said drum and is open at both the top and bottom ends.

A plurality of supports 11, preferably angle bars, are secured to the inside of the air dischargepipe 10 and extend downwardly therefrom and a plurality of radially disposed vanes 12 are secured to said supports 11 and project outwardly below the end of the discharge pipe, an open area substantially as large as pipe 10 being left in the center of the vanes. The upper edge 13 of each vane 12 is inclined downwardly from the inner to the outer side and the bottom edge 14 of each vane is similarly inclined. downwardly. An annular plate 15 is secured to the bottom of vanes 12 and forms a frustroconically shaped bottom having a centrally arranged openifigjle' of substantially the same diameter. as the air outlet pi e 10 said bottom 15 being pitched at a sufficientangle so that any solid matter that settles thereon will slide off. I find that if the bottom 15 is fiat or has only a slight angle cinders may collect thereon and be carried out through air discharge pipe 10. The bottom 15 braces andsupportsthevanes and helps to guide and direct the air into dischar e conduit 10 and tends'to' pre vent the discharging air from sweeping down into the conical bottom portion 6 thereby preventing eddieswhich might'otl'ierwise produce back pressure against the incoming air.

The outer edges of the vanes 12 are 111- clined outwardly fron'r top to bottom as at 16 the angle of said edges 16' being substantially the same as the angle of separa tion between the cinder laden air and the clear air as indicated at 17 and the object of thus inclining the edges of the vanes-12 being to extend the vanes as close-as'possible to the strata of cinder laden air ith out actually disturbing the cinders or solid matter or producing eddies that will dis-' to operate the same.-

It will c noted that the vanes 12 and bottom plate 15 are entirely within the drum 5 and above the bottom plane of said drum as represented by the line 18 and do not extend down into the conical portion 5 where they would restrict the area through which the descending solid matter passes, and, as I have found, decrease the efliciency of a precipitator or necessitate the provision of a larger precipitator to perform the same work.

I also-find that it is desirable although notnecessary, to prevent moisture that enters through conduit 10 from falling on the walls of conical bottom portion 6, and causing the solid matter to adhere thereto. To accomplish this I provide a drip pan 20 adjustably suspended below the bottom 15 by supports 21 and having an outlet pipe 22 through which moisture =may discharge. The pro vision of this pan eliminates the necessity of using a hood over conduit 10 or using any device that will change the course of the discl'iarging air, all of which devices I find will increase back pressure within conduit- 10 and drum 5.

Pan 20 is adjustably supported because it is found that said pan must be adjusted or set for eachprecipitator to insure maximum efiici'ency for the. conditions under which that precipitator is to operate. Ordinarily no further adjustment will be necessary unless the conditions. under which the precipitator operates are changed. Obviously the moisture receptacle may be dispensed with if conditions do not require the same.

' An outlet conduit 24: for air or gas laden with solid matter as cinders, soot and smoke is arranged to deliver tangentially into the upper peripheral portion of the drum it being understood-that the same is connected with. means not shown, as with a fan or blower by which a velocity may be imparted to the air or as.

trifugal force toward the circumference of drum 5 and will, I find foru'i a coneof'separation of the solid matter from the cleaner air or gas substantially as indicated by the line 1'? in Fig. l. The particles of solidvmat= t r collecting in the peripherale-portion of the drum 5 and cone 6 slide down the sides of cone 6 and pass out through discharge vent 7 while the cleaner air passing inwardlythrough vanes 12 finds an. unobstructed opening thi-ougl'i conduit 10 and discharges freely with the least possible amount of back pressure against the incoming: air and against the fan that drives such air.

The separation begins the instant the air; or gas enters the drum 5 and the air should practically all discharge before it has passed more than ones around the drum 5.

The foregoing description and accompany:

iiig drawings clearly disclose a preferred embodiment of myinvention but it will be understood that changes in this device may be'inade within the scope and spirit of the following claims.

I claim: I

'1. In a device of the classdescribed, a drum having a conical bottom portion, tangential airinlet means connected with said drum,- a centrallyarranged air discharge conduit open at both ends and extending downwardly into said drum from the top end,-and radial vanes projecting outwardly beyond'said air inlet conduit below the bottom end thereof, the outer edges of said: vanes beinginclined outwardly from'top tobottom relative to'the axis of the drum.

2. In a device of the class described, a

drum having a conical bottom portion, tangential air inlet means connected with said drum,- a centrally arranged air discharge conduit open at both ends anda extending downwardly into said drum from the top end, and radial vanes projecting outwardly beyond said air inlet conduit below the bottom end thereof, the top and bottom edges of said vanes beingninclined downwardly from inside to outside and the outeredges of said vanes being inclined outwardly from the top to the bottom.:

3. In a device of the class described, a drum having a conical bottom portion, tangential air inlet means connected with said drum, a centrally arranged air discharge conduit open at both ends and extending downwardly into said drum from the top end and radial vanes projecting outwardly beyond said air inlet conduit below the bottom end thereof, the outer edges of said vanes being inclined outwardly from the top to the bottom on an angle that corresponds substantially to the line of separation of the solid matter from the air in said drum.

at. In a device of the class described, a drum, a conical extension on the bottom end of said drum, tangential air inlet means at the upper end of said drum, a relatively large air outlet conduit open at both ends and extending downward centrally into said drum, and a plurality of radial vanes supported below the lower end of said air outlet conduit and projecting outwardly therefrom, the bottom edges of said vanes being inclined downwardly from the center outwardly and an annular conical bottom plate secured to the bottom edges of said vanes said bottom plate having an open center.

5. In a device of the class described, a drum, a conical extension on the bottom end of said drum, tangential air inlet means at the upper end of said drum, a relatively large air outlet conduit openv at both ends and extending downward centrally into said drum, a plurality of radial vanes supported below the lower end of said air outlet conduit and projecting outwardly therefrom, and a shallow circular receptacle supported below said vanes to catch moisture that en ters through said air discharge conduit.

6. In a device of the class described, a drum, a conical extension on the bottom end of said drum, tangential air inlet means at the upper end of said drum, a relatively large air outlet conduit open at both ends and extending downward centrally into said drum, a pluarlity of radial vanes supported below the lower ends of said air outlet conduit and projecting outwardly therefrom, the bottom edges of said vanes being inclined downwardly from the center outwardly, an annular conical bottom plate secured to the bottom edges of said vanes said bottom plate having an open center and a shallow circular receptacle supported below said vanes to catch moisture that enters through said air discharge conduit.

The foregoing specification signed at Tacoma, WVashington, this 8th day of October,

ERNST FEIX.

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