JPS6322869B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for separating powder and granular materials in an air stream, and more particularly to an air flow swirl type separator that separates and collects powder and granular materials during air flow transport.

In an airflow swirl type separation device as shown in Fig. 1, when separating powder and granules contained in the airflow, there are cases where the powder and granules to be separated are abrasive,
When the air flow contains a large amount of powder or granules, as in air transport, the separator inner wall surface member shown in 4 in FIG. 1 is required to have wear resistance. In the prior art, wear countermeasures have been taken for the inner wall members of the separator by applying hard facings to them, lining them with a special wear-resistant material, or increasing the thickness of the members.

However, the prior art has disadvantages in that anti-wear measures are very expensive and it is difficult to replace the wear-resistant material or repair the separator inner wall surface member.

An object of the present invention is to provide an airflow swirling type that eliminates the drawbacks of the conventional techniques described above, and that can easily and economically prevent wear of the inner wall surface member of the separator while maintaining the original separation function of the separator at a high level. to provide separation equipment.

The cylindrical part and the conical part of the airflow swirling type separation device protrude at least on the inner wall surface of the conical part along the height direction of the conical part in the radial direction of the conical part, and the side surface thereof is orthogonal to the swirling airflow in the conical part. A plurality of protrusions forming a surface are provided at predetermined intervals in the circumferential direction of the conical part, and wear of the protrusions themselves due to powder particles in the swirling airflow is greatly reduced. A deposited layer of powder and granular material is formed in between, and this deposited layer prevents wear on the inner wall surface of the separation device.

FIG. 2 is an illustrative view showing a cross section of a tangential entrance type cyclone separator according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view taken along lines 1 to 2 in FIG.

An air flow containing powder and granules flows in from the air inlet 1 containing powder and granules shown in FIG. When the flow reaches near the lower end of the cyclone, the flow starts to reverse and rise, rotating around the center of the cyclone and rising, and flows out from the outlet section 2. The powder contained in the airflow is separated outwardly by centrifugal force as it swirls downward with the airflow, passes through the separator inner wall surface 5, and falls into the powder and granule collection section 3. In this embodiment, as shown in FIG. 3, which shows the cross section of FIG. A protrusion-shaped airflow resistance member 6 is cylindrical and protrudes in the radial direction of the cylindrical portion and the conical portion along the height direction of the separator inner wall surface 5, respectively, and the side surfaces thereof form a surface perpendicular to the swirling airflow. 8 rows at predetermined intervals in the circumferential direction of each of the part and the conical part,
It is attached by welding. The number and size of the airflow resistance members 6 can be appropriately determined depending on the size of the separator. Wear of the separator inner wall member 4 is caused by colliding with the separator inner wall member 4 when the powder and granules are separated, but as shown in this embodiment, the airflow resistance member 6 is attached to the separator inner wall member 4. By attaching the separator to the separator inner wall surface member 4, collisions occur at the airflow resistance portion when the powder particles are separated, so an effect of preventing wear on the separator inner wall surface member 4 can be expected. In other words, when a powder or granule collides with a surface, the wear of that surface is most likely to occur when the colliding surface of the powder or granule is located at an angle of approximately 45 degrees to the length of the powder or granule. and
The surface that the powder collides with is least at around 0 degrees and around 90 degrees with respect to the flow direction of the powder.
In the present invention, the airflow resistance member 6 protrudes in the radial direction on each inner wall surface of the cylindrical portion and the conical portion, and the side surfaces thereof are formed to be substantially perpendicular to the swirling airflow. wear is significantly reduced. Therefore, the airflow resistance member 6 can maintain its shape even during long-term operation of the separator. Therefore, during operation of the separator, a deposited layer 7 of powder and granular material is formed in the gap between the airflow resistance members 6 as shown in FIG. Collision with powder and granules is avoided, so wear on the inner wall surface is prevented even during long-term operation. In addition, in the airflow swirl type separation device, since the airflow is restricted in the conical portion, the wear of the inner wall surface of the conical portion is particularly significant. Therefore, although the airflow resistance member is absolutely necessary in the conical part, it is not necessarily provided in the cylindrical part. Furthermore, in this embodiment, the airflow resistance member 6 is attached to the separator inner wall surface member 4 by welding, and when the airflow resistance member 6 is worn out, a new airflow resistance member is installed in an appropriate position. It can be easily repaired by welding.
FIG. 3a is an enlarged view of the mounting portion of the airflow resistance member 6.

By employing welded bead mounting as the airflow resistance member 6, the repair work of the airflow resistance member and the work of attaching it to the separator inner wall surface member 4 are facilitated. In addition, since the air flow resistance member 6 is not formed above the air inlet part 1 on the inner wall surface of the cylindrical part, the pressure drop of the gas introduced from the air inlet part 1 and swirling is prevented from decreasing. Therefore, the centrifugal force at the portion below the air inlet portion 1 can be increased, without impairing the original separation function of the separator.

According to the present invention, it is possible to easily and economically prevent wear of the separator inner wall surface member of an airflow swirl type separator while maintaining the separation function as a separator, and it is effective in extending the life of the separator. .

[Brief explanation of the drawing]

FIG. 1 is an illustrative diagram showing an example of the structure of a conventional airflow swirl type separation device, and FIG. 2 is an illustrative diagram showing an example of a separation device provided with an airflow resistance section according to the present invention.
FIG. 3 is a cross-sectional view taken along the line -' in FIG. 2, FIG. 3a is an enlarged view of the mounting portion of the airflow resistance member, and FIG. 4 is an explanatory view showing the state of the inner wall surface during operation of the separation device. Explanation of symbols: 1... Air inlet section containing powder and granules;
2... Air outlet section, 3... Powder collection section, 4...
Separator inner wall member, 5... Separator inner wall surface, 6...
Airflow resistance member, 7...Deposition layer.

Claims (1)

[Claims] 1 A conical part whose diameter is reduced downward is connected to the lower part of the cylindrical part, an air inlet part is provided for introducing gas containing powder from a tangential direction to the cylindrical part, and an opening is provided in the lower part of the conical part. In the airflow swirling type separation device having an airflow discharge part substantially concentric with the cylindrical part, an inner wall surface of the cylindrical part and an inner wall face of the conical part on the lower side than the air inflow opening part have respective inner wall heights. A plurality of protrusions are provided at predetermined intervals in the circumferential direction of each inner wall surface, the protrusions protruding in the radial direction along the width direction and forming surfaces whose side surfaces are perpendicular to the swirling airflow. An airflow swirl type separation device featuring: