Coal mill for improving coal dust uniformity and method

Abstract

The invention discloses a coal mill for improving coal dust uniformity and a method. The coal mill comprises a base and a rotary separator, wherein the rotary separator is arranged at the top end in the base, the lower end of the rotary separation is connected with a dust return cone, and a coal dust balancing device communicated with the rotary separator is arranged above the rotary separator; the coal dust balancing device comprise a coal dust distributor, a flow equalizing blade and a backflow cone; the interiors of the coal dust distributor, the rotary separator and the coal return cone are sheathed with coal dropping pipes externally sheathed with coal dropping pipe sleeves; the flow equalizing blade and the backflow cone are both arranged on the coal dropping pipe sleeve, and the backflow cone is located below the flow equalizing blade; the left part of the upper end of the coal dust distributor is provided with a coal dust main pipeline, and the right part of the upper end of the coal dust distributor is provided with a driving motor. The method for improving the coal dust uniformity comprises the step of uniformly mixing the coal dust by the action of the coal dust balancing device. The coal mill disclosed by the invention effectively solves the problems of obvious jet flow phenomenon and non-uniform coal dust mixing of conventional coal mills, so as to produce coal dust with excellent uniformity, and thus not only lowering the production cost, but also increasing the production benefit.

Description

technical field [0001] The invention relates to a coal mill and a method, in particular to a coal mill and a method for improving the uniformity of coal powder. Background technique [0002] Coal mill is one of the important equipment of pulverized coal boiler. It can dry raw coal and grind it into qualified coal powder, which can be sent into the furnace for combustion to generate a large amount of energy, so it can be widely used in electric power, metallurgy, building materials, chemical industry and other industries The pulverizing system, especially the blast furnace coal-injection pulverizing system that needs to use a large amount of bituminous coal. Most of the current coal pulverizers have the problem of uneven mixing of pulverized coal in the pulverized coal pipeline, and the fineness of pulverized coal in the pulverized coal pipeline varies greatly. , and the pulverized coal distributor of the traditional coal mill cannot fully mix the pulverized coal, resulting ...

AI Technical Summary

Problems solved by technology

Most of the current coal pulverizers have the problem of uneven mixing of pulverized coal in the pulverized coal pipeline, and the fineness of pulverized coal in the pulverized coal pipeline varies greatly. , and the pulverized coal distributor of the traditional coal mill cannot fully mix the pulverized coal, resulting in uneven quality of the pulverized coal produced, which greatly increases the production cost and reduces the production efficiency

In addition, the unevenness of the pulverized coal in the pulverized coal pipeline will lead to inconsistent ignition time of the pulverized coal entering the burner on the same floor. The normal performance, but also conducive to the production of harmful substances such as nitrogen oxides, greatly increasing the risk of production

Images