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In the coal-fired generating units, the primary air that used to dry and carry coal dust had a direct effect on the burning operation mode in boiler furnace. Too large or too small air-coal ratio would affect the formal combustion of coal dust in the boiler. A high primary air flow which could lead to a high wind pressure had an adverse effect on the primary air tube and burner wear. Moreover, when...
As the temperature change effect of the primary air and powder mixture in storage-type milling system, it is difficult to obtain accurate results of the direct measurement of the primary wind speed, resulting in this type of boiler system, the thermal adjustment of milling tests difficult. To address this problem, according to the heat balance principle of the air-tube boiler pulverized coal flow,...
The significance of primary air is widely recognized in fossil fuel conveyor system as predominant power resources. Engineering applications have shown that the primary air may behave as a medium of fuel delivery and combustion. Regular combustion is decided to great extent by a proper air-to-coal weighted ratio. However, little is known about currently employment on sealing air related to the air-to-coal...
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