I have a coal mill that I am balancing. Do these a lot and normally they are straight forward. This mill was rebuilt with a new shaft and the old wheels and hubs. This has a CCW rotation. Started at 8.5 mils at 130 degrees. I installed 559 grams at 225 degrees. The result started at 9.5 mils at 20 degrees and then, over the next 45 minutes, walked back to 8.5 mils at 85 degrees. So, I
Get Price5) Mill body vibration. 6) Mill worm shaft vibration. 7) Outlet temperature. 8) Driving motor input AMPs and coal feed rate. The following is a typical set of formulas with a brief description for each of the above parameters: 1) Journal displacement measurement shows the thickness of coal in the pulverizer 10.
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Get PriceAbstract: The coal-pulveriser/coal mill is an important subsystem upstream of boilers in coal-based thermal power plants. The efficient boiler operations demand optimum combustion-air to coal-fuel ratio (AFR). In fact, a portion of (preheated) combustion air, called primary air, passes through the coal mill and carries pulverised coal to the
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Get PriceOct 31, 2016Coal-burning at the plants continued into the 1950s and 1960s. But Mill River District residents complained about vibrations from the turbines and coal ash in the air. To cut back on pollution, United Illuminating swapped oil for coal in many of its facilities, with English Station converting in 1960.
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Get PriceSep 01, 2008When the level of coal powder inside the mill is higher, the vibration energy amplitude is smaller, Fig. 5 showing this trend. However, Fig. 5 shows that the energy amplitude of the front shaft is not the same as that of the rear shaft. A possible explanation is that the distributions of balls and coal powder inside the mill were not uniform. 4.2.
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