A medium-speed coal pulverizer with ash reduction and desulfurization device

Abstract

The invention discloses a medium-speed coal mill with a deashing desulfurizing device, comprising a coal feeding pipe, a conical shell, a coarse powder separator retainer, a grinding ring and the deashing desulfurizing device.The conical shell is disposed outside the coal feeding pipe.The coarse powder separator retainer is disposed at the top of the conical shell.The grinding ring is disposed below the conical shell.The deashing desulfurizing device comprises am impurity separating module, an impurity discharge pipe and an impurity sensing module; the impurity separating module is disposed at the bottom of the conical shell of the medium-speed coal mill, the impurity sensing module is disposed outside the medium-speed coal mill, and the impurity separating module and the impurity sensing module are communicated through the impurity discharge pipe.The medium-speed coal mill with the deashing desulfurizing device has the advantages that output of the coal mill is increased, power consumption per unit powder production is reduced, equipment abrasion is reduced, water-cooled wall high-temperature corrosion and lagging tendency is reduced, low-temperature corrosion of boiler tail heated surface is reduced, sulfur emission of power plants is reduced and running cost of a desulfurizing system is reduced; the removed impurity is recyclable, and benefit can be maximized.

Description

technical field [0001] The invention relates to a medium-speed coal pulverizer with an ash reduction and desulfurization device, belonging to the field of coal pulverizers in coal-fired power plants. Background technique [0002] Coal mill is one of the most important auxiliary machines in coal-fired power plants. Its operating status directly affects the safe and economical operation of boilers. At the same time, it is also one of the most power-consuming auxiliary machines in power plants. According to the working speed of the coal mill, coal mills in power plants can be roughly divided into the following three types: high-speed coal mills, such as fan coal mills; medium-speed coal mills, such as flat disc coal mills, ball mills, Bowl coal mill, etc.; low-speed coal mill, such as barrel steel ball mill. Generally, the cylindrical steel ball mill is mostly used in the intermediate storage bin type pulverizing system, and other types of coal pulverizers are mostly used in t...

AI Technical Summary

Problems solved by technology

Impurities circulate inside the coal mill, which not only increases the wear of internal components, but also affects the output of the coal mill, increases the pressure difference of the coal mill, and thus significantly increases the power consumption of the whole plant

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