US1724461A - Revolving grate for gas producers - Google Patents

Description

Aug. 13, 1929.

G. DIENNE REVOLVING GRATE FOR GAS PRODUCERS Filed July 13, 1925 Patented Aug. 13, 1929.

If Ta s. lf S l? GASTON DIENNE, 0F HAINE ST. IEIERRE, BELGIUM, ASSIGNOR TO SOCIETE ANONYME LES ATELIERSlvIECANIQUES, 6F l-IAYETTES-PAR-MORLANWELZ, BELGIUM.

REVOLVING GRATE FOR GAS PRODUCERS.

Application filed July 13, 1925, Serial N'o.

The present invention relates to an improvement in revolving grates for gas-producers. I,

It has heretofore been customary to provide revolving grates with multiple concen tric or annular plates or rings revolving in opposed or in the same direction, at different angular speeds, and having uniformly distributed slots or openings cut therein, the said openings being covered by auxiliary elevated covers or projections integral with the grates, having a grate-like or perforated surface, and of which the wall directed towards the direction of rotation of the grates .is open to allow the discharge or removal of the ashes.

In such known constructions, the auxiliary elevated covers, taking part in the movement of the main grates, efiected the cleaning of the tire in the annular path covered by their rotation, and the ashes between these annular paths were discharged or removed through the free space left between the main grates.

Now, according to the present invention, the auxiliary elevated covers 'or projections, with or without grate-like or perforated surface, are provided with an opening in their wall facing the axis of rotation of the grates, the object of such opening being to allow the removal in a radial direction of the ashes comprised between't-he annular paths covered by the elevated covers, due to centrifugal force.

The improved construction referred to makes it possible to eliminate overlapping of the annular grates, and consequently to avoid the friction exerted by the ashes on the said grates when passing between the overlap ping portions.

Besides being provided with an opening in their wall facing the axis of rotation of the grates in order to allow the removal of the ashes in a radial direction, in accordance with the invention, the elevated covers may still be provided in known manner with an opening in their wall directed towards the direction of rotation of the grates in order to allow the removal of the ashes in a circumferential direction.

Further, according to the invention in a modified form these two openings may be combined in the shape of a single opening in a plane disposed obliquely to the radii of tion.

cred by auxiliary elevated covers 3 43,247, and in Belgium September 2, 1924.

the grate and turned towards the direction of rotation.

The ash-discharge openings cut in the surface of the grates are disposed in such a manner that when the latter are not in mo-- tion, the ashes are, owing to the elevated auxiliary covers, retained on the grates in the form of a natural heap.

The movement of rotation of the grates sets'up pressures which determine the discharge or removal of the ashes through the openingsof the elevated covers directed towards the direction of rotation of the grates (circumferential removal of the ashes) while the centrifugal force resulting from the movement of the grates pushes the ashes in the'opening's of the elevated covers directed towards the centre of rotation of the grates (radial removal of the ashes). 7

In order that it may be more readily understood, the invention is, by way of example, illustrated by the accompanying drawing wherein:

Figure 1 is a half plan of a grate structure wherein the annular grates are provided ture provided with auxiliary elevated covers accordingto a modified form of the inven- Referring first to Figuresl to 3, the: grate structure illustrated comprises three concentric revolving annular grates 1,1, and

1.\ Each of these grates has a number of v ash-discharge openings or slots 2 cut in the surface thereof, and these openings are covwhich are formed'integrally on the grates and in the embodiment illustrated have their upper horizontal surface formed as a grate 4. In accordance with the invention, these eletion of the grates 1, 1 and 1 (this direction being indicated by the arrow X, X and X respectievly), but they also have a second opening 6 for the removal of the ashes formed in their wall directed towards the vated covers 3 not only have an opening 5" for the removal of the ashes formed in then wall directed towards the direction of rota-' axis of rotation of the grates 1, 1 and 1", i. e. in their wall facing the centre of the three concentric elevated covers. On Figures 2 and 3 may be seen how, when the grates are not in motion, the ashes remain thereon in the form of a natural heap.

Referring now to Figure 4, in this case the openings for the circumferential and for the radial removal of the ashes, instead of being independent as in the case of the openings 5 and 6 respectively of Figure 1, are

combined in the shape of a single opening 7 which as shown is situated in a plane disposed obliquely to the radii of the grate, and directed towards the direction of rotation X-Xf of the grates 1, 1, 1.

By arranging the auxiliary elevated covers in the above described manner, there are obtained:

1. Zones of radial removal of the ashes in the direction indicated by the arrows Y on Figures 1 and 4: through the opening in the wall of the elevated covers 3 facing the axis of rotation of the grates;

2. Zones of circumferential removal of the ashes in the direction indicated by the an rows Z on Figures 1 and 4 through the opening in the wall of the elevated covers 3 directed towards the direction of rotation (X, X and X) of the grates;

3. Zones of both radial and circumferential removal of the ashes in the directions indicated by the arrows Y-Z on Figure 4 through the single oblique opening of the elevated covers 3 facing the direction of rotation of the said grates.

There may if desired be arranged on an individual annular grate:

1. Elevated covers permitting the removal of the ashes in a radial and in a circumferential direction by means of two independent openings or by means of a single diagonal opening as described above;

2. Elevated covers permitting the re moval of the ashes in a radial direction by The above described improved construction of the elevated covers, without abandoning any of the advantages of the known constructions, procures the following advantages:

1. It enables the combustible to be' brought to all the points of the fire, thus regularizing the combustion and eliminating the formation of slag and of funnels;

2. It makes it possible to derive the full benefit of the radial movement of the mass of ashes for the removal or discharge of the ashes, and thus to eliminate the compression of the ashes against the outer wall;

3. Owing to the elimination of the compression of the mass of ashes against the outer wall, the harmful influence of the latter becomes nonexistent;

4L. Byregulating thesize and position of the openings in the elevated covers, it makes it possible to obtain a uniform cleaning on the whole area of the fire;

It makes it possible to increase the area of the main grates in view of the possibility of establlshlng two zones of removal or discharge of the ashes for each grate;

6. The increased area of the grates affords a better support for the latter; and

7. It eliminates overlapping of the main revolving grates, and consequently the friction resulting from the passage of the ashes between the overlapping portions.

I claim: I

1. In a revolving gas producer grate, comprising a plurality of independent concentric rings, holes in said rings, casings formed integral with the rings over the holes, the upper horizontal surface of said casings being formed as a grate, said casings having a hole in the wall turned towards the direction in which they move, the combination of an opening of substantial area provided in the walls of the casings and facing the rotation axis, for the discharge of ashes under the action of the centrifugal force.

2. A revolving gas producer grate, com prising a plurality of independent concentric rings, holes in said rings, casings formed integral with the rings over the holes, the upper horizontal surface of the casings be ing formed as a grate, an opening provided in the casings for the centrifugal removal of ashes, said opening being obliquely disposed with respect to the radii of the grate and turned towards the direction of rotation, substantially as described.

In testimony whereof my name.

GASTON DIENNE.

I signed hereunto

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