US1695692A - Pulverized-fuel-feeding apparatus - Google Patents

Description

Dec. 18, 1928.

H. KRElSlNGER PULVERIZED FUEL FEEDING APPARATUS Filed Sept. 12, 1925 awwewtoz Elf/tom W 7 ZLMMW Patented Dec. 18, 1928.

'UNITED STATE/S PATENT OFFICE."

HENRY KREISINGER, OE IIERMONT, NEW

YORK, ASSIGN OR TO INTERNATIONAL COM- BUSTION ENGINEERING CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

PULVERIZED-FUEL-FEEDING APPARATUS.

Applicatibn filed September 12, 1925. Serial No. 55,906.

This invention relates to pulverized fuel systems and particularly-to the feeding of the fuel.

One of the difficulties encountered in this art is bridging of the fuel in the storage bins from which the fuel is fed to burners or elsewhere.

When the coal in the bin bridges or arches,

feed will cease as soon as the coal below the arch has been removed. This bridging usually occurs. in the lower portion of the bin and it is customary to break the arch or bridge by opening of the exterior of the bin with asledge hammer. I

It is the primary object ofthe present invention to prevent this difficulty and secure a uniformity of feed.

How the foregoing, together with such other objects as may hereinafter appear, or

are incident to my invention are realized,

meral 7 indicates the bill or hopper, which isusually rectangular in cross section and which is adapted to discharge into the throat portion 8, below which is the feed screw 9 i I slope of thesides of the bin adapted to discharge the pulverized fuel into the line-10 leading to the burners or elsewhere. The throat is controlled by'the usual,

gate 11. i

To prevent the arching or bridging above described I locate'a grid A in the lower portion of the bin 7. This grid is preferably composed of a plurality of thin bars 12.

These bars are preferably from to 4 inch thick and'about 1'to 1% inches wide and h they are place apart about 2 inches with the edges up, i. e., in the direction of the flow.

The grid may be. supported in any suitable way and. in the present Instance I'have sloped the end plates 13 of the grid the same as the so that the grid automatically positions itself.

I have found that such a grid overcomes this difficulty altho one would suspect that the presence of such a number of plates would interfere with rat-her than promote proper. flow. I assume the arching or bridging above referred to is poduced by unevenness in flow in various portions. of the coal and that the effect of the bars on the grid is to producean uniform flow cross sectionally of the bin. Whatever the reason therefor'may be, I have found by actual experience that the device prevents arching.

I claim: g

1. In coal handling apparatus, a gravity discharge bin or reservoir for pulverized coal, feeder mechanism therefor, and a grid in the bin above the feeder mechanism, said grid comprising a plurality of stationary spaced bars.

' 2. In coal handling apparatus, a gravity discharge bin or reservoir for pulverized coal, feeder mechanism therefor, and a grid in the bin above the feeder mechanism, said 1 grid comprising a plurality of stationary spaced bars, said bars being in the form of.

plates with the edges in the line of flow.

3. In a coal handling apparatus, a gravity discharge. bin or reservoir for pulverized coal having a hopper shaped bottom with a discharge outlet, feeder mechanism there for, and a grid in the bin comprising a plurality of spaced bars extending across the hopper I shaped portion of the bin well abovethe dischar e outlet.

4. In acoal handling ap aratus, a gravity discharge bin or reservoir or pulverized coal having a restricted discharge outlet, feeder .mechanism therefor, and a grid in the bin comprising a plurality of spaced bars extending across the bin well above the discharge outlet. 4

5. In a coal discharge bin or reservoir for pulverized Tcoal. aving a hopper shaped bottom with a. discharge outlet, feeder mechanism therefor, and agrid in the bin comprising a plurality of sgaced' bars extending across the hopper s apedporti'on of the bin and resting on the walls thereof. p

In testimony whereof, I have hereunto signed my n'amef HENRY KREISINGER.

handling apparatus, a gravity"

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