US1971092A

US1971092A - Jet impact pulverizer

Info

Publication number: US1971092A
Application number: US577580A
Authority: US
Inventors: Anger Paul
Original assignee: Individual
Current assignee: Individual
Priority date: 1930-10-09
Filing date: 1931-11-27
Publication date: 1934-08-21
Anticipated expiration: 1951-08-21

Description

Aug. 21, 1934. P. ANGER 1,971,092

JET IMPACT PULVERIZER Filed Nov. 27, 1931 Patented Aug. 21, 1934 UNITED STATES PATENT OFFICE Application November 2'7, 1931, Serial No. 577,580 In Germany October 9, 1930 4 Claims. (CI. 83-46) This invention relates to a jet impact pulverizer of the kind comprising a funnel the lower end of which is formed into a jet nozzle which communicates with an air supply pipe,

' materials fed into the funnel being thrown by the air jet against an impact member.

The object of the invention is to prevent a choking up of the nozzle by tramp metal or other heavy materials during the operation of the pulverizer and by the ordinary material remaining in the funnel when the air pressure is cut off, and the invention consists broadly in the provision of means for discharging such materials through the jet nozzle.

For this purpose an aperture is provided in the deepest part of the pulverizer through which the materials can be discharged on the air pressure in the nozzle being cut off or reduced. A pocket may be arranged to receive the discharged materials, and means are provided for discharging materials from the pocket without interfering with the normal working of the pulverizer.

Fig. 1 of the accompanying drawing represents a vertical section of an apparatus according to the invention,

Fig. 2 is a vertical section of a modified form of the apparatus,

Fig. 3 is a vertical section of a further modification,

Fig. 4 is a vertical section of a still further modification,

Fig. 5 is a vertical section showing another modification, and

Fig. 6 is a vertical section showing yet another modification.

The pulverizer comprises the usual funnelshaped vessel 1 fitted with an inlet 2 for the materials to be pulverized and formed at the bottom with a nozzle 3 which communicates with a supply of compressed air and which produces within the container an upwardly directed jet. The materials are blown by the jet through a mixing pipe 4 against an impact member 5, the materials being reduced by the impact. The dust is carried away by the air current through an uptake 6, and the coarser particles fall back to the bottom of the container for renewed participation in the pulverizing process.

Fig. 1 shows a construction wherein a pocket 7 is arranged under the nozzle 3. This pocket is normally closed by means of a slide valve 8 or the like. If this slide is opened during the operation of the pulverizer, part of the air will be diverted through the pocket, and the pressure on the nozzle 3 will be considerably reduced.

Specifically heavy particles such as stones and pieces of metal, will therefore be able to sink through the (nozzle into the pocket and thence into the open. As soon as the valve is closed normal working of the apparatus is resumed.

The foreign particles can also be sorted out by stopping the blower in which case the contents of the vessel 1 will fall into the pocket whence it can be discharged when required.

In the arrangement according to Fig. 2 the pocket is fitted with a valve in the form of a vaned wheel 9 which allows the materials to be discharged from the pocket without disturbing the normal working of the apparatus.

Fig. 3 shows an arrangement with two slide valves 10 and 11. With this arrangement the blower can be stopped for a short time to enable the heavy particles to settle on the top valve, and they can then be discharged by opening one valve at a time after the normal working has been resumed. The separating 01f of the heavy particles can also be effected by first opening the top valve and then stopping the blower to let the particles fall on the bottom valve. Then the top valve can be closed and the normal working resumed while the valve 11 is opened for the discharge of the materials.

Instead of stopping the blower, it may in some cases be sufiicient to reduce the pressure in the nozzle to enable the heavy particles to fall through. The reduction of the pressure in the nozzle can be effected by the provision of a branch pipe 14 on the supply pipe 12. A valve 13 in this branch pipe can be opened for discharging part of the air through the pipe instead of through the nozzle 3. Since the air thus discharged, though it is free from dust, may be disagreeably hot, it may be advantageous to continue the pipe 14 as a by-pass and connect it to the vessel 1. Fig. 4 shows such an arrangement, the by-pass 17 being connected by means of a valve 13' and an extension 14' to the vessel 1 above the level of the impact member 5.

The arrangement shown in Figs. 3 and 4 can also be applied to the construction shown in Figs. 1 and 2.

In the arrangement shown in Fig. 5 the bent supply pipe 12 is provided, under the nozzle 3, with an aperture which is normally closed by a flap valve 15. When this valve is open the materials are discharged into a receptacle 16.

Fig. 6 shows a similar arrangement, but the valve 15' is arranged to open inwards instead of outwards, and the air pressure will therefore tend to maintain the valve closed. When the valve is in the position shown by dotted lines, the air pipe is, closed, and the materials will be discharged into the receptacle 16.

I claim:

1. A jet impact pulverizer of the character described, comprising an upright funnel, means for feeding materials into said funnel, an impact member in said funnel, a bent air-supply pipe connected to the lower end of the funnel and having an aperture aligned with the ertical axis of the funnel, means for closing the aperture, and a vertical mixing pipe supported centrally within the funnel between the lower end of the latter and said impact member."

PAUL ANGER.