Coal Mill

Coal Mill

Coal mill is an important auxiliary equipment for coal-powder furnace, it has three methods to crush the coal lump and grind them into powder,it is crushing, impacting and grinding. Air swept coal mill is the main equipment in cement plant for both drying and grinding of the powders. Compared with the ordinary ball mill, it has advantages of higher capacity, more convenient operation, safer usage, and more reliable performance.

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Description

  • 1.Introduction Coal continues to play a predominant role in the production of electricity in the world, A very large percentage of the total coal is burned in pulverized form. Pulverized coal achieved its first commercial success in the cement industry. At Wisconsin Electric Power Company, the use of pulverized coal was also shown to be a viable fuel for electrical power production after World War I Pulverized coal burns like gas, can be easily lighted and controlled.
  • 2.Coal pulverizer/mill system One of the critical power plant components that is relied upon to convert the energy stored in coal into electricity is the coal pulverizer or mill. The coal flow is controlled by the feeder, allowing coal to flow into the pulverizer mill. The pulverized coal and air mixture is then transport to the boiler burner panels.
  • 3.Boiler Boiler drum Reheater Final Super Platen Super heater heater LTSH Economizer Coal bunker Wind Box Secondary PA duct air duct Furnace Flue gas APH duct Coal feeder F D Fan P A Fan Coal Pulverizer
  • 4.Pulverizer The pulverizer receives the raw coal and reduces it to a very fine, specified size consist, similar to face powder.
  • 5.Types of PulverizersSpeed Low Medium High 10 to 20 40 to 70 900 to rpm rpm 1000 rpmType Ball tube Bowl Hammer mill Ball & race mill millDominating Attrition Crushing Impactprinciple

Features

  • 1: Higher yield;
  • 2: Convenient operation;
  • 3: Safer usage;
  • 4: Reliable performance

Technical data

Model specification (m) Capacity (t/h) Rotating speed (r/min) Transmission type Motor Reducer Weight(t)
Remark Model Power(kw) Model Reduction ratio
φ2.2×3 5-6 22 Edge YR355M-8 185 ZD50 5 37  
φ2.2×4.4 8-9 22 Edge YR355M-6 220 ZDH50 6.3 46  
φ2.4×4.75 14 20.4 Edge YR400-8 280 ZD60 4.5 54  
φ2.4×4+2 10-12 20.2 Edge YRKK450-8 250 ZDY35580 4.5 59  
φ2.4×4.5+2 16-17 20.4 Edge YR4005-8 280 JDX-450 4.5 76  
φ2.6×4.8+2 9-10 20 Edge YRKK5002-8 400 RZD75 4.5 91  
φ2.6×5.25+2.25 13-14 19.7 Edge YRKK500-8 400 ZDY400-4.5-11 4.5 98  
φ2.8×5+3 8-10 18.9 Edge JRQ1512-10 480 MCD-70 3.55 107  
φ3×9 18-20 18.3 Edge YBKK5560-8 630 MBY560 5 124  
φ3.2×9.5 28 17 Edge YR800-8/1180 800 NFM710 6.3 140  
φ3.4×5.25+2.8 30 17.47 Edge YRKK-56-6 900 JDX-800 7.157 169 Exclude main transmission
φ3.8×7.25+3.5 41-43 16.7 Edge YR630-8 1400 MBY800 5.6 220  

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