DE395726C - Cross beater mill combined with air separator - Google Patents

Description

GERMAN EMPIRE

Bur. ma. Bgendom

- \ ~ 'Γ ίο «)

ISSUED
ΑΜ23.ΜΑΠ924

REICH PATENT OFFICE

PATENT LETTERING

- JVr 395726 - CLASS 50c GROUP

Electricity Act Ges. vorm. Schuckert & Co. in Nuremberg and Gustav Petri in Elberfeld.

. Cross beater mill combined with air separator. Patented in the German Empire on August 15, 1922.

The invention relates to beater mills combined with an air classifier Crushing of coal, flax and other fuel-containing bulk material up to Dust fineness as required for dust firing. Such mills are already there known, which are designed, among other things, in such a way that the racket mechanism in housed in a container which is covered with a hood and which widens towards the top is to which the ground material is arranged on the bottom by a screw conveyor from a side Reservoir is supplied.

In such mills, the beater train consists of a number of arms or wings inside said container, the

39S72G

are attached to a vertical, rapidly rotating axis. The sighting of the grist in coarser and finer particles is effected by a stream of air passing through an opening ; enters at the bottom of the container and exits through an opening in the hood, so that the sifting air stream the whole mass of the Crosses out the grist. In contrast to this) in the subject matter of the invention sifting air flow is only guided past the upper mouth of the hammer mechanism container, in which only the finest particles of the grist are whirled up, so that the air flow only takes these particles with him, so to speak, in passing.

An embodiment of the subject matter of the invention is shown schematically in the drawing Way illustrated.

The shredding device is housed in a container ι which is on a pedestal 2 rests, expands upwards and is covered with a hood 3, which contains the wind sifter. The shredding device consists of a number of crosses 4 lined up on an axis 5 with corresponding to that from bottom to top increasing width of the container 1 arms of different lengths. The axis 5 runs in one Foot bearing 6. It carries the armature of an electric motor 7 - the is housed in the base 2 -, under the motor 7 a pulley 9 and also inside the hood 3 a fan 8. The pulley 9 is used to drive a Shaft 10, which drives a screw conveyor 12 through an adjustable friction gear. These The screw conveys the grist from the storage container 13 into the lower part of the container 1.

The hood 3 contains a bell 14, which is open towards the crossbeams 4 and which forms the fan wheel 8 encloses and is provided with an exhaust pipe 15. Between this bell on the one hand, the wall of the hood 3 and a collar 16 projecting inwardly from this wall, on the other hand, an annular space is formed, which is in communication with the space outside the hood through an opening 17. ο The mill works in the following way: The grist, which by the screw conveyor 12 is conveyed into the container 1, is shaken here by the crossbeams; the coarser particles are crushed by the fact that they stick to each other, to the Crosses and hit the container wall. The finer particles are through

Claims (3)

Patent Claims: 90 1. Cross beater mill combined with an air separator for fuel-containing debris ■ well with an upwardly widening, covered with a hood container for the sighting, characterized in that, that the inlet opening (17) for the fresh air and the outlet opening (15) for the Dust-carrying air flow are provided in the upper hood of the mill, so that the air flow only at the upper part the hammer mill sweeps past. 2. Embodiment of the mill according to claim i, characterized in that the on the axis (5) of the hammer mechanism seated fan wheel (8) in an inside the Hood (3) arranged, housed against the beater mill open bell (14) is, which opens into the outlet opening (15). 3. embodiment of the mill according to claim ι and 2, characterized by a tio inwardly projecting collar (16) at the lower end of the hood for guiding the air flowing in through the inlet opening (17) of the hood. the centrifugal force of the crossbeams on the wall varies depending on the degree of their fineness lifted high. The finest dust-like particles get into the draft area of the fan 8, will be in the bell ■ sucked in and blown through the pipe 15 and a pipe to be connected to the dust firing system or into a storage container. Fresh air flows through the opening τη into the interior of the hood 3, initially into the ■ named annulus after. The flow of air '^; is indicated by arrows. There is no need for the slender shape of the hammer mechanism and the chalice-like extension to highlight its upper part as a special feature of this mill. The racket is designed so that its diameter is greater than linear with the height above the The bottom of the container 1 increases and that the total height is greater than the mean diameter. This shape in connection with the large number of stacked Crosses 4 is important for the effect of the mill. The regrind supplied below is mainly used for one-time Rise through the racket to the desired fineness, so that only a relatively small amount of coarser particles necessary for the continuation through the The sifting air flow is still too heavy, falls back into the hammer mechanism. 1 sheet of drawings.