Mitsubishi Hitachi Power Systems, Ltd.

Babcock-Hitachi Kabushiki Kaisha

Hideo Mitsui

Yutaka Takeno

Hiroaki Kanemoto

Shinichiro Nomura

Takashi Aizawa

Teruaki Tatsuma

Yoshinori Otani

Provided is a vertical pulverizing apparatus capable of suppressing abrasion of throat vanes () and elongating their abrasion resistant lives to thereby increase working efficiency. The vertical pulverizing apparatus is characterized in that: a throat () is provided between a housing () and a pulverizing table () and has an annular flow channel which is surrounded by a throat inner peripheral wall () and a throat outer peripheral wall () and which is partitioned by a large number of throat vanes (); and a slope part () extending diagonally downward from an inner peripheral wall surface of the housing () toward a top end of the throat outer peripheral wall () and a horizontal part () extending from a bottom end of the slope part () continuously to the top end of the throat outer peripheral wall () are provided so that top end surfaces () of the throat vanes () and a top surface of the horizontal part () can be set at the same height.

Vertical pulverizing apparatus

To provide a classification device in which product fine powder little in mixture ratio of coarse particles can be obtained. A classification device characterized in that a setting pitch P between stationary finsand a width L of each stationary finare combined so that a value of P/L is in a range between 0.042&#xd7;(&#x3b8;&#x2212;50)+0.64 and 0.019&#xd7;(&#x3b8;&#x2212;50)+0.22 in 50&#xb0;&#x2266;&#x3b8;&#x2266;70&#xb0; when &#x3b8; is an inclination angle of each stationary fin, P is the setting pitch, and L is the width in a direction of circulation of particles.

Classification device, vertical pulverizing apparatus using the same, and coal fired boiler apparatus

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Kure, Japan

Hideo Mitsui