Unlock instant, AI-driven research and patent intelligence for your innovation.

Coal grinding method using medium-speed coal mill and coal mill used

A coal mill, medium-speed technology, applied in the direction of dryers, grain processing, lighting and heating equipment, etc., can solve the problems of grinding roller wear, coal quality is not loose, etc.

Inactive Publication Date: 2017-05-31
邹铭
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the high-moisture coal falls into the grinding bowl, it may also cause the coal to be loose and form a cake due to the high moisture content, so that the pebble coal will be embedded in the coal cake and aggravate the wear of the grinding roller.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Coal grinding method using medium-speed coal mill and coal mill used
  • Coal grinding method using medium-speed coal mill and coal mill used
  • Coal grinding method using medium-speed coal mill and coal mill used

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Such as Figure 1 to Figure 3 As shown, the coal mill used includes a coal drop tube 2 and a mill body 1. The mill body 1 is provided with a coal drop port 6, a coal outlet 8 and an air inlet 4, and the mill body 1 includes a coal drop port 6 and an inlet Air duct 4, a pre-drying device is added at the coal drop 6 at the front end of the mill body 1 to pre-dry the coal entering the mill body (1), so that the drying output and working conditions of the mill body 1 can be improved, thereby improving the coal grinding The output of the machine is reduced, the unit consumption of the coal pulverizer is reduced, and the wear of the grinding roller is reduced. The pre-drying device includes a circular cylindrical body 7. The cylindrical body 7 is composed of an upper end cover 71, an outer sleeve 72 and an inner sleeve 73. The pipe 72 is provided with an air inlet pipe 3, which is divided into 2 to 4 branch pipes before being connected to the outer tube 72 of the cy...

Embodiment 2

[0026] Example 2: Reference Figure 4 , Is a schematic diagram of the structure of the coal mill pre-drying device used in embodiment 2 of the present invention. Compared with embodiment 1, the difference of this embodiment is: the diameter of the lower end of the outer sleeve 72 of the pre-drying device and the coal drop at the front end of the mill body 1 The diameter of the port 6 is the same, that is, the diameter of the coal drop port 6 is larger than the diameter of the inner sleeve 73.

Embodiment 3

[0027] Example 3: Reference Figure 5 , Is a schematic diagram of the structure of the coal mill used in embodiment 2 of the present invention. Compared with embodiment 1, the difference of this embodiment is that the air inlet pipe 3 directly introduces hot air through the fan 12, and the hot air used for pre-drying can be It is generated by a general heat source, or it can be high-temperature flue gas; the point of use can be the primary air at the entrance of the coal mill, the hot primary air duct, or the furnace or boiler flue.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a coal milling method adopting a medium speed coal mill as well as the coal mill. The coal mill comprises a coal falling pipe (2) and a mill body (1), wherein the mill body (1) is provided with a coal falling port (6), a coal outlet (8) and an air inlet channel (4), a pre-drying device is added to the coal falling port (6) in the front end of the mill body (1) for pre-drying coal entering the coal mill, so that the drying capacity and the working condition of the mill body (1) are improved, further, the drying capacity of the coal mill is improved, the unit consumption of the coal mill is reduced, and wear of a mill roller is reduced.

Description

Technical field [0001] The invention relates to a coal pulverizer falling coal pre-drying method and a device thereof, in particular to a method for grinding coal using a medium-speed coal pulverizer and the coal pulverizer. Background technique [0002] Medium-speed coal mill is a commonly used coal mill in thermal power plants. Its common models include ZGM, MPS, HP and other series of roller mills and bowl mills. The working principle of the medium-speed coal pulverizer is that the molybdenum coal falls from the coal falling tube into the grinding disc. After the molybdenum coal falls into the mill disc, it is subjected to centrifugal force to throw the molybdenum coal to the grinding bowl and the wind ring to complete the grinding and drying, and then it is blown to separate The separation is completed at the device. [0003] When the medium-speed coal mill grinds high-moisture coal, the output of the coal mill is restricted due to the high moisture content in the coal and ins...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B02C15/00B02C23/02F26B21/00
Inventor 邹铭张耀
Owner 邹铭