Medium-speed coal mill primary air chamber guide device

Abstract

The invention discloses a medium-speed coal mill primary air chamber guide device, and relates to the medium-speed coal mill technology field. Problems that under a working condition that an existingmedium-speed coal mill produces powder during long-time operation, an air speed and an air volume in a primary air chamber are uneven, an internal flow field is disordered, and a ''turbulent flow'' occurs; and then non-working surfaces of a coal mill cylinder wall and a coal mill grinding roller at a certain single local position in a coal mill are seriously abraded, and an overhaul workload is increased are solved. A guide unit is arranged in the primary air chamber of the medium-speed coal mill. One end of an adjusting handle is connected with the guide unit. A sealing box is in a cuboid shape with an open end, a long-strip-shaped through hole is arranged in a side surface of the sealing box, the sealing box is arranged on a shell of the medium-speed coal mill, the sealing box penetratesthrough the shell of the medium-speed coal mill and stretches into the primary air chamber, and the other end of the adjusting handle penetrates through the shell of the medium-speed coal mill and the long-strip-shaped through hole in the sealing box. The device is suitable for adjusting an air direction and the air speed in the primary air chamber of the medium-speed coal mill.

Description

technical field [0001] The invention relates to the technical field of medium-speed coal pulverizers, in particular to a guide device for a primary air chamber of a medium-speed coal pulverizer. Background technique [0002] Under the working conditions of long-term operation of pulverization in the existing medium-speed coal mill, the phenomenon of uneven wind speed and air volume inside the primary air chamber, disordered internal flow field, and "turbulent flow" will occur, and then the coal mill will appear The wall of the coal mill barrel and the non-working surface of the coal mill roller in a single part of the interior are severely worn. The main reason is that after the primary air enters the primary air chamber of the coal mill, it will diverge and flow in an uneven direction, and converge at a certain point. When the pulverized coal is carried by a large wind speed, it will cause the primary wind to converge at the local outlet of the upper air ring of the medium...

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the phenomenon of uneven wind speed and air volume inside the primary air chamber, disordered internal flow field, and "turbulent flow" in the existing medium-speed coal mill under the working condition of long-term operation of pulverization. The coal mill barrel wall and the non-working surface of the coal mill roller in a single part of the coal mill have serious wear and tear, and the problem of increasing the maintenance workload, and a medium-speed coal mill primary air chamber guide device

Images