JPWO2020217323A5

JPWO2020217323A5 -

Info

Publication number: JPWO2020217323A5
Application number: JP2021515359A
Authority: JP
Filing date: 2019-04-23
Publication date: 2022-03-07
Anticipated expiration: 2039-04-23

Claims

An annular hopper provided around the central axis and having an inner peripheral wall and an outer peripheral wall defining a receiving space for receiving the supply of granules.
An annular table provided around the central axis below the receiving space,
A cooling unit for supplying a cooling fluid to the receiving space of the annular hopper,
A scraper provided between the annular hopper and the annular table is provided.
The scraper is
The first portion located radially inside the intermediate position between the inner peripheral wall and the outer peripheral wall, and
A second portion of the scraper located within the facing range of the annular table and radially outside the intermediate position between the inner peripheral wall and the outer peripheral wall.
Including
The lower surface of the second portion of the scraper is a granular material cooling device located higher than the lower surface of the first portion.

The granular material cooling device according to claim 1, wherein the scraper satisfies H1> H2 when the vertical dimension of the first portion is H1 and the vertical dimension of the second portion is H2.

The scraper has Hin_ave> when the average value of the vertical dimensions in the region between the intermediate position in the radial direction and the lower end of the inner peripheral wall is Hin_ave and the vertical dimension of the second portion is H2. The granular material cooling device according to claim 1 or 2, which satisfies H2.

The scraper has Hin_ave as the average value of the vertical dimensions in the region between the intermediate position in the radial direction and the lower end of the inner peripheral wall, and the region between the intermediate position in the radial direction and the lower end of the outer peripheral wall. The granular material cooling device according to any one of claims 1 to 3, which satisfies Hin_ave> Hout_ave, where Hout_ave is the average value of the dimensions in the vertical direction.

The scraper is
A tip portion comprising the first portion and having a flat lower surface facing the annular table.
An adjacent portion including the second portion, provided adjacent to the tip portion on the radial outer side of the tip portion, and having a larger distance between the annular table and the lower surface than the tip portion. The granular material cooling device according to any one of claims 1 to 4.

The granular material cooling device according to claim 5, wherein the boundary between the tip portion and the adjacent portion is located between the intermediate position and the lower end of the outer peripheral wall in the radial direction.

When the radial distance between the intermediate position and the lower end of the outer peripheral wall is W, the radial distance between the boundary and the lower end of the outer peripheral wall is 0.2 × W or more and W or less. The granular material cooling device according to claim 6.

Claims 5 to 7 wherein the adjacent portion of the scraper extends at least in the radial direction over a range of 30% or more of the region between the lower end of the outer peripheral wall and the outer peripheral side end of the annular table. The granular material cooling device according to any one of the items.

The adjacent portion of the scraper has a portion in which the vertical distance between the lower surface of the scraper and the upper surface of the annular table increases toward the outside in the radial direction, according to any one of claims 5 to 8. The granular material cooling device described.

The granular material cooling device according to any one of claims 1 to 9, wherein the upper surface of the scraper at the radial position of the lower end of the outer peripheral wall is located above the upper surface of the scraper at the intermediate position.

The granular material cooling device according to any one of claims 1 to 10, wherein the width of the second portion in the circumferential direction of the annular hopper is larger than the width of the first portion in the circumferential direction.

Within the cross section including the extending direction and the vertical direction of the scraper, the cross-sectional area Ain of the region radially inside the scraper from the intermediate position and the region radially outside the scraper from the intermediate position. Of the above, the ratio Ain / Aout to the cross-sectional area Aout of the portion radially inside the straight line connecting the lower end of the outer peripheral wall and the outer peripheral side end of the annular table is 2/3 or more and 3/2 or less. The granular material cooling device according to any one of 1 to 11.

Within the cross section including the radial direction and the vertical direction, the angle between the straight line connecting the lower end of the outer peripheral wall and the outer peripheral side end of the annular table and the straight line along the upper surface of the annular table is 15 degrees or more and 40 degrees or less. The granular material cooling device according to any one of claims 1 to 12.

A scraper for guiding the granules deposited on the annular table of the granular material cooling device to the radial outside of the annular table.
With a tip with a flat bottom surface,
An adjacent portion having a lower surface adjacent to the tip portion in the extending direction of the scraper and located higher than the flat lower surface of the tip portion.
Equipped with
The tip portion and the adjacent portion are located within the contact range of the scraper with the granules.
Scraper.

The tip portion has a tip surface along an oblique direction with respect to the extending direction of the scraper in a plan view.
The scraper according to claim 14 , wherein in the tip portion, the tip surface is connected to the flat lower surface.