Mitsubishi Heavy Industries Limited

Mitsubishi Hitachi Power Systems, Ltd.

Mitsubishi Power, Ltd.

Takashi Tsutsuba

Shinji Matsumoto

Takuichiro Daimaru

Kenichi Arima

Manabu Oda

Kazushi Fukui

Tsugio Yamamoto

Yasuhiro Sueoka

Koki Matsuzaki

Sotaro Yamaguchi

Provided is a roller mill that is provided with: a rotary table; a raw coal adding tube that supplies solid fuel to the rotary table; and a roller that rotates about a rotating shaft by being pressed against a grinding surface of the rotary table and grinds solid fuel along with rotation of the rotary table. In such a roller mill, a position where an outer peripheral surface of the roller and the grinding surface of the rotary table come into contact with each other and a circumferential velocity of the outer peripheral surface equals a circumferential velocity of the grinding surface is located further to an inner circumferential side of the rotary table than a position where the outer peripheral surface and the grinding surface come into contact with each other at a center position in a width direction of the roller.

Roller mill and method for manufacturing roller mill

In a rotary classifier and a vertical mill, a rotary separator () is configured such that plural rotary blades () are fixed to an outer circumference portion at predetermined intervals in a circumferential direction between an upper support frame () and a lower support frame (), which have a disk-like shape, wherein a tilted surface (), which tilts at an acute angle relative to a tangent line (T) to a rotation locus (G) on an outer circumference side and includes a concave portion () formed between an outer end () and an inner end (), is formed on a front surface of each of the rotary blades () in a rotating direction.

Rotary classifier and vertical mill

In a vertical roller mill in which a fixed-type cyclone sorter is provided in a casing, the fixed-type cyclone sorter includes a conical member; a fixed-blade entrance window through which a solid-gas two-phase flow is introduced into the interior of the conical member; a flat plate-like fixed blade that causes the solid-gas two-phase flow to spiral; an inner cylinder into which pulverized coal is guided from the bottom end thereof toward the top end thereof by means of spiraling of the solid-gas two-phase flow; and a pulverized-coal exit through which the pulverized coal guided to the top end of the inner cylinder is guided outside the conical member, wherein the fixed blade is provided with a tip portion where a downward flow is increased for the solid-gas two-phase flow guided into the interior of the conical member from the fixed-blade entrance window.

Vertical roller mill

Growing community of inventors

Tokyo, Japan

Takashi Tsutsuba