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Ball mill pulverizing system as the main equipment of coal powder, he will, in order to improve the fuel utilization rate, obtain taller economy, while reducing environmental pollution. Coal mill fired power plant, the boiler coal sort and each power plant ball mill in different circumstances, the milling equipment and systems are not the same.
Economic operation of coal pulverizing system is an important parameter is theball mill, in fact due to the lack of effective means of measuring the material level in ball mill machine, it is difficult to get the real-time measurement, the operator on the closed rotary ball in the situation is not clear enough, in the production process, in order to avoid the powder blocking phenomenon, often at the expense of economy to ensure the safety of the system, make the mill work in the long-term economic zone. Therefore, to solve the optimization problem of milling system operation, to ensure the effectivemeasurement of ball mill.
The lime mill level measurement can be divided into direct measurement and indirect measurement of the two methods. Direct measurement is measured by the measuring device installed in the lime mill bearings, indirect measurement refers indirectly through the measurement of the lime mill is running other operating parameters, and based on the intrinsic relationship of the lime mill with these parameters to calculate the material. Direct measurement of the large amount of investment, and due to changes in the lime mill liner wear will have a greater impact on the measurement results, resulting in the measurement of the degree is not high. Indirect method out of the differential pressure method, noise hair. Axial compression method, the pressure differential method, strain, acoustic emission wave method can measure the value of the lime millfeed.
Ball mill pulverizing system in coal-fired power plant is an important subsystem, it is the task in accordance with the provisions of the pulverized coal fineness and water economy, pointed out the need of pulverized coal boiler and supplied to the furnace, in order to ensure the stability, economic operation of boiler.
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