JPS647826B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for supplying a material to be processed into a high-speed gas flow ejected from a jet port, pulverizing the material by the speed difference between the material to be processed and the high-speed gas flow, and pulverizing the material by the high-speed gas flow. The present invention relates to a gas flow type pulverizer configured to pulverize objects to be processed by pulverizing objects to be processed by colliding with each other based on the difference in velocity given to each object by acceleration.

Conventional gas flow type crushing equipment, for example,
As described in Publication No. 25983, in the connection path that communicates and connects the high pressure gas supply device and the classifier,
One nozzle device each having one jet port that spouts out high-pressure gas supplied from a high-pressure gas supply device at high speed and a direct current path connected to the downstream side thereof is connected in series, and near the downstream side of the jet port in the jetting direction. Since the supply route for supplying the material to be processed was configured with one supply port facing the other, the energy of the high-pressure gas supplied from one supply channel could not be fully utilized for pulverizing the material to be processed, resulting in a reduction in energy efficiency. The downside was that it was low.

In other words, when the overall moving speed of the object to be processed reaches approximately the same speed as the flow rate of the high-speed gas flow, the relative velocity differences between the object to be processed and the high-speed gas flow, as well as between the objects to be processed, are almost eliminated. This is because the particles flow into the classifier without being pulverized.

The present invention has been made in view of the above-mentioned circumstances, and by devising the nozzle device and the supply structure of the processed material, it is possible to connect the processed material and the high-speed gas flow, as well as the processed material, for a relatively long period of time. The purpose is to create a mutual relative speed difference so that the energy of high-pressure gas supplied from one supply path can be efficiently utilized for pulverizing the object to be processed.

In order to achieve the above object, the characteristic configuration of the gas flow type crushing apparatus according to the present invention is that the high pressure supplied from the supply path is connected to the connection path that communicates and connects the supply path of the high-pressure gas supply device and the inflow path of the classifier. A nozzle device is connected in which a plurality of nozzles each having a nozzle that spouts gas at a high speed and a direct current path connected to the downstream side of the nozzle are connected in series on one axis, and a nozzle device is connected to the nozzle device, which is formed by connecting a plurality of nozzles in series on one axis, and has a nozzle that is equipped with a nozzle that spouts gas at high speed and a direct current path that is connected to the downstream side of the nozzle. Each of them has a supply port of a supply route for supplying the object to be treated facing the supply port, and this configuration provides the following effects.

That is, instead of pulverizing the workpiece supplied from one supply port using a nozzle device equipped with one jet port and one DC path as in the past, the material to be processed is pulverized alternately between the jet port and the DC path. A nozzle device with multiple stages in series is installed, and the material to be processed is mixed into the high-speed gas flow ejected from the upper jet port in the direction of high-pressure gas supply, and the material to be processed is pulverized in the direct current path, reducing the moving speed of the material. Even when the gas reaches almost the same speed as the high-speed gas flow and there is almost no pulverization, the mixture of this gas and the object to be processed will be ejected again from the next ejection port located on the downstream side. Therefore, the gas flow rate in the mixture increases again, and at this time, the gas flow accelerates the fine particles in the workpiece earlier than the coarse particles, increasing the relative velocity between the coarse and fine particles. A difference occurs, and these particles collide with each other, promoting pulverization.

Furthermore, since the material to be processed is newly supplied to this ejected mixture, the newly supplied material to be processed collides with the material to be processed in the already supplied mixture, and its moving speed is reduced. decreases, the difference in relative speed between the workpiece and the high-speed gas flow, as well as between the workpieces, is generated again, and pulverization is performed again.

Therefore, it is possible to generate a high-speed gas flow and a relative velocity difference between the workpiece and the workpiece over a relatively long period of time, and the energy of the high-pressure gas supplied from one supply path can be transferred to the workpiece. We have now been able to provide a gas flow type pulverizer that can be used efficiently for pulverizing.

Next, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 1, a connection passage 4b that communicates and connects the supply passage of the high-pressure gas supply device 5 and the inflow passage 3b of the wind classifier 3 is provided with a connection passage 4b for pulverizing the material to be processed, which will be described later. The nozzle devices A are connected in series to constitute a gas flow type crushing device.

As shown in FIG. 2, the nozzle device A is a nozzle equipped with a first jet port 1 that jets high-pressure gas supplied from a high-pressure gas supply device 5 at high speed, and a direct current path 4a connected to the downstream side of the first jet port 1. , the terminal end of the DC path 4a is configured as a second ejection port 2, and this second
It is constructed by connecting two nozzles in series on one axis, including a nozzle device including a jet port 2 and a direct current path 4c continuous to the downstream side of the second jet port 2,
The DC paths 4a and 4c are each formed into a pipe shape so that the gas and the object to be treated flow temporarily in one direction.

a supply path 6 for supplying the object to be processed to each of the first and second ejection ports 1 and 2 near the downstream side in the ejection direction;
The coarse powder take-out route 8 of the classifier 3 is attached to the supply route 6 for the first jet port 1 so that the supply port 7 of the classifier 3 faces out.
At the same time, the coarse powder extraction route 8 and the raw material supply route 10 from the hopper 9 are connected to the supply route 7 for the second spout 2, and the dampers 11a, 11b
The coarse powder distribution ratio to both supply paths 7 and 8 can be adjusted by adjusting the opening degree of the feed paths 7 and 8.

The fine powder extraction path 12 of the classifier 3 is connected to a solid-gas separator 13 consisting of a cyclone, a back filter, etc., so that the crushed product is sent to the recovery section 14 and the gas is sent to the exhaust path 15, respectively. A coarse powder amount detection sensor 16 is provided in the coarse powder extraction path 8, and based on the information from the sensor 16, the dampers 11a, 11b and the fine powder extraction path 12 are
If a controller 17 is provided to automatically adjust the opening of the damper 11c of the damper 11c to suppress changes in the gas ejection speed from both the ejection ports 1 and 2, the first ejection port 1
The structure is such that the amount of coarse powder supplied to the pulverizer is maintained at an amount suitable for pulverization by jetting from the second jetting port 2.

As _shown in FIG.
The hole diameter d ₂ of the direct current path 4a that continues on the downstream side, the diameter d ₂ of the second jet port 2 formed at the end
Hole diameter d ₃ of the direct current path 4c connected to the downstream side of the jet nozzle 2
are configured such that the distance L from the first jet port 1 to the second jet port 2 is set such that the material to be treated near the downstream side of the first jet port 1 is sufficiently accelerated. The flow path constriction portion 18 is configured to have the required length, and the flow path constriction portion 18 is formed so as to effectively accelerate the object to be processed by the high-speed gas from the first jet port 1. The material to be processed is pulverized from the supply path 6 by the high-speed gas of It is configured to be crushed.

In addition, the hole diameter of the DC path 4a on the downstream side of the first jet port 1
The specific structure of both jet ports 1 and 2 can be changed in various ways, such as by slightly changing d ₂ so that it becomes smaller toward the downstream side to increase the jet speed. For example, it is also possible to use a Laval nozzle for the ejection port 1 and utilize supersonic airflow.

As shown in FIGS. 3 and 4, the classifier 3 is configured such that an inlet passage 3b is connected to the outer circumferential side of the swirling flow chamber 3a in a substantially tangential direction; Connect the fine powder extraction path 12 in a state where it is directed towards the inflow path 3b, and
An adjustment plate 19 that changes the inflow effective area a ₁ within a range of the inflow channel cross-sectional area a ₂ or more is provided so that the angle can be adjusted freely by the handle 20, and the gas flow rate at both the jet ports 1 and 2 is suppressed from decreasing. It is configured so that the reference particle size can be changed and set.

Note that the practical number of nozzles to be installed is two, each having the jet ports 1 and 2 and the direct current paths 4a and 4c connected to the downstream side thereof, but three or more nozzles may be installed. Only the raw material or a mixture of the raw material and the coarse powder from the classifier 3 may be supplied to each of the downstream sides of the feed channels 6 and 2. can be changed in various ways.

As mentioned above, it is advantageous in terms of management to automatically adjust the coarse powder distribution ratio to the supply channels 6 and 7 using the controller 17.
Various configuration changes can be made, such as configuring 1a to 11c to be manually adjusted, and the means for adjusting the coarse powder distribution ratio can be variously changed, so they are collectively referred to as distribution ratio adjusting devices 11a, 11b, and 11c.

The wind selection classifier 3, high-pressure gas supply device 5, solid-gas separator 13, piping configuration, etc. can be changed in various ways.

The pulverizer according to the present invention takes advantage of the fact that the temperature rise is small and can be used to produce, for example, plastics, foods, medicines, and the fact that ultra-fine powder is easily obtained.
For example, various materials can be treated, such as pigments, dyes, and titanium oxide.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

The drawings show an embodiment of the gas flow type crushing device according to the present invention, and FIG. 1 is a flow sheet, FIG. 2 is a longitudinal sectional view of the nozzle device, FIG. 3 is a longitudinal sectional view of the classifier, and FIG. 4 is a longitudinal sectional view of the classifier. FIG. 3 is a cross-sectional view of the classifier. 1, 2... Ejection port, 3... Classifier, 3b... Inflow path, 4a, 4c... DC path, 4b... Connection path, 5... High pressure gas supply device, A... Nozzle,
6, 7... Supply route, 8... Coarse powder removal route, 10
...Raw material supply route, 11a, 11b, 11c...
Distribution ratio adjustment device.

Claims (1)

[Scope of Claims] 1. A spout 1 that spouts high-pressure gas supplied from the supply path at high speed into a connection path 4b that communicates and connects the supply path of the high-pressure gas supply device 5 and the inflow path 3b of the classifier 3. or 2 and a direct current path 4a or 4c connected to the downstream side thereof, a nozzle device A is connected in series on one axis, and the downstream side of the jetting direction of the jetting ports 1 and 2 is connected. A gas flow type crushing device in which the supply ports of supply paths 6 and 7 for supplying the material to be processed are facing each other in the vicinity. 2. Two nozzles are provided in the nozzle device A, and the supply path 6 to the upper spout 1 in the high-pressure gas supply direction is connected to the coarse powder extraction path 8 of the classifier 3.
and the supply path 7 for the downstream spout 2
are connected to the coarse powder extraction route 8 and the raw material supply route 10, and adjust the distribution ratio of coarse powder from the coarse powder extraction route 8 to both supply routes.
The gas flow type crushing apparatus according to claim 1, wherein the gas flow type crushing apparatus is provided with the following. 3 The distribution ratio adjusting devices 11a, 11 are adjusted based on the detection of the fluctuation in the amount of coarse powder in the coarse powder extraction path 8.
The gas flow type crushing apparatus according to claim 2, further comprising a controller 17 for automatically operating the pulverizers b and 11c. 4. The gas flow type crushing apparatus according to any one of claims 1 to 3, wherein the classifier 3 is a wind selection type classifier.