Coal deactivation processing device

Patent metadata

Field	Value
Publication number	US-2016289582-A1
Application number	US-201415037807-A
Country	US
Kind code	A1
Filing date	Nov 12, 2014
Priority date	Dec 6, 2013
Publication date	Oct 6, 2016
Grant date	—

Abstract

The present invention makes it possible to prevent the spontaneous combustion of coal while causing oxygen to be adsorbed to the surface of the coal in an efficient manner. A coal deactivation processing device includes: a rotary kiln body provided rotatably into which coal and a processing gas are supplied; a feed pipe provided so as to be able to rotate along with the rotary kiln body), extending along a lengthwise direction of the rotary kiln body (103), and having a coolant flowing therein, and a protruding portion provided to the outer circumferential section of the feed pipe so as to protrude toward the rotation direction of the feed pipe. The feed pipe and the protruding portion are arranged so as to pass through a coal layer resulting from the accumulation of coal within the rotary kiln body when the rotary kiln body rotates.

First claim

1 . A coal deactivation processing device performing deactivation of coal with a processing gas that includes oxygen, comprising:
a kiln body provided rotatably into which the coal and the processing gas are supplied; and a feed pipe provided so as to be able to rotate along with the kiln body, extending along a lengthwise direction of the kiln body, and having a coolant flowing therein, a protruding portion provided on an outer circumferential section of the feed pipe, protruding in a direction of rotation of the feed pipe, and having a hat shape in a radial cross-section of the feed pipe; and the feed pipe and the protruding portion being arranged so as to pass through an accumulated coal layer of the coal within the kiln body upon rotation of the kiln body.

2 . The coal deactivation processing device according to claim 1 , wherein
the protruding portion has a V shape in the radial cross-section of the feed pipe, and a vertex of the protruding portion matches a path of a central axis of the feed pipe.

3 . The coal deactivation processing device according to claim 1 , wherein
the protruding portion has a symmetrical shape in a plane passing through the vertex of the protruding portion and the central axis of the feed pipe, and an angle formed by a straight line joining respective intersections of the feed pipe with two tangent lines tangent to the feed pipe passing through the vertex of the protruding portion, and by one of the two tangent lines, is greater than an angle of repose.

4 . The coal deactivation processing device according to claim 1 , wherein
a distance between the vertex of the protruding portion and the central axis of the feed pipe is equal to or less than twice a radius of the feed pipe.

5 . The coal deactivation processing device according to claim 2 , wherein
the protruding portion has a symmetrical shape in a plane passing through the vertex of the protruding portion and the central axis of the feed pipe, and an angle formed by a straight line joining respective intersections of the feed pipe with two tangent lines tangent to the feed pipe passing through the vertex of the protruding portion, and by one of the two tangent lines, is greater than an angle of repose.

6 . The coal deactivation processing device according to claim 2 , wherein
a distance between the vertex of the protruding portion and the central axis of the feed pipe is equal to or less than twice a radius of the feed pipe.

7 . The coal deactivation processing device according to claim 3 , wherein
a distance between the vertex of the protruding portion and the central axis of the feed pipe is equal to or less than twice a radius of the feed pipe.

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Nakagawa Keiichi
• Omoto Setsuo

Classifications

• C10L2290/06

  Heat exchange, direct or indirect · CPC title

• C10L2290/145

  of air · CPC title

• C10L2290/56

  Specific details of the apparatus for preparation or upgrading of a fuel · CPC title

• C10L5/04 Primary

  Raw material {of mineral origin} to be used; Pretreatment thereof {(pretreatment of fuels of non-mineral origin C10L5/40)} · CPC title

• C10L9/08

  by heat treatments, e.g. calcining · CPC title