Bowl-type medium speed coal mill

Abstract

The bowl-type medium speed coal mill includes a coal shoot, a separator cap, an inner cone, a separator, a vane wheel unit, a speed reducer, an exhaust valve unit, a door regulator, a Venturi, a side machine body, a milling roll unit, a milling bowl unit, a sealed air manifold and a coal gangue exhaust port. The variable loading spring unit for controlling the loading force is fixed on the separator and connected via pull rod screw to the milling roll unit. The bowl-type medium speed coal mill has high reliability.

Description

technical field

[0001] The invention relates to a bowl-type medium-speed coal pulverizer used in a boiler pulverization system of a coal-fired thermal power plant. Background technique

[0002] The structure of the existing bowl-type medium-speed coal mill is as follows: figure 1 shown. It mainly consists of coal drop pipe, separator top cover, inner cone, separator body, impeller device, planetary gear reducer, discharge valve device, folding door adjustment device, Venturi pipe, side body device, bowl grinding device, It is composed of sealed air header, pebble coal discharge port and other components.

[0003] The grinding roller of this coal mill adopts a hydraulic variable loading device 17 . Although theoretically speaking, this will automatically change the loading force of the grinding roller with the coal feeding rate; at the same time, since the loading force changes linearly with the coal feeding rate, it can also reduce power consumption; however, in actual op...

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