Coal mill

A coal mill and grinding roller technology, applied in the field of coal mills, can solve the problems of improving the grinding of coarse coal powder, unsuitable grinding of coarse coal powder, etc., to achieve increased ventilation, stable and accurate loading force , improved size and angle effects

Active Publication Date: 2014-05-07
BEIJING POWER EQUIP GRP
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However, this utility model also does not carry out technical improvements aimed at

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[0044] In order to better understand the present invention, the present invention will be described in detail below in conjunction with specific embodiments. However, it is obvious that different modifications and modifications can be made to the present invention without going beyond the broader spirit and scope of the present invention defined by the appended claims. . Therefore, the following examples are illustrative and not restrictive.

[0045] Such as Figure 1-4 As shown, a coal mill includes a grinding device, the grinding device includes a grinding roller assembly 3 and a grinding disc assembly 4, the grinding roller assembly 3 includes a grinding roller and a grinding roller sleeve 8, the grinding disc assembly 4 is provided with Liner 9, wherein: the width of the grinding roller sleeve 8 is increased by at least 6% to 8% on the original basis, and its wrap angle is reduced by at least 18% to 20% on the original basis. The original basis is reduced by at least 16% to...

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Abstract

The invention provides a coal mill. The coal mill comprises a grinding device, wherein the grinding device comprises a grinding roller assembly and a grinding disc assembly; the grinding roller assembly comprises a grinding roller and a roller sleeve of the grinding roller; the grinding disc assembly is provided with a lining plate. The coal mill is characterized in that the width of the roller sleeve of the grinding roller is at least increased by 6% to 8% on the previous basis and the wrap angle of the roller sleeve is at least reduced by 18% to 20% on the previous basis; the wrap angle of the lining plate is at least reduced by 16% to 18% on the previous basis, and the circular arc radius of the lining plate is at least increased by 23% to 25% on the previous basis. Compared with the prior art, the coal mill has the beneficial effects that on the basis of a conventional type ZGM middle-speed coal mill, grinding and separating targets of the ZGM middle-speed coal mill are changed through technical improvement in the aspects of optimizing a grinding type molded line, a nozzle ring structure, a rotary separator structure, a hydraulic loading device and the like; the requirements of crushing, grinding, drying and separating rough grain coal powder (D50=0.4-0.5mm) ground by the ZGM middle-speed coal mill are completely met.

Description

technical field [0001] The invention relates to a coal mill, in particular to a ZGM coal mill for grinding coarse coal powder. Background technique [0002] Circulating fluidized bed boiler technology is a high-efficiency, low-pollution and clean combustion technology that has developed rapidly in the past ten years. Internationally, this technology has been widely used commercially in the fields of power station boilers, industrial boilers and waste treatment and utilization, and is developing towards large-scale circulating fluidized bed boilers with a scale of hundreds of thousands of kilowatts; domestic research and development in this area And applications are also gradually emerging, and hundreds of circulating fluidized bed boilers have been put into operation or are being manufactured. The next few years will be an important period for the rapid development of circulating fluidized beds. The circulating fluidized bed has high requirements on the particle size distr...

Claims

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Application Information

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IPC IPC(8): B02C15/00B02C23/20
Inventor 刘宇贾建文王庆文岳子江
Owner BEIJING POWER EQUIP GRP
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