About Power plant primary air coal distributor
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About Power plant primary air coal distributor video introduction
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6 FAQs about [Power plant primary air coal distributor]
What happens if you underestimate primary air flow in a coal plant?
Inaccurate measurements that underestimate actual levels of primary air (PA) flow in a coal plant are particularly problematic, because higher-than-expected PA flow levels wreak havoc on more than just combustion efficiency and maximum unit capacity.
Can air flow control improve the stability of coal-fired power generation plant?
The results of the experiments conducted in a 300 MWe coal-fired power generation plant showed that the use of the control strategy of the air flow rate in the CCS improved the stability of the main steam pressure and mitigated the fluctuations of the coal flow.
How does high primary air flow affect pulverized coal?
Combustion. The immediate effect of high primary air (PA) flows is on combustion of pulverized coal. Burner coal nozzle exit velocities are vey dependant on the level of PA flow. High PA flows cause excessive nozzle exit velocities and hamper the ability of secondary air fed around the PA/coal stream to mix with the coal.
Does load demand affect air flow rate in coal-fired utility boilers?
The total air flow rate in a boiler changed with load demand, and the influence of different fuel types can be neglected at the same load level. On this basis, an air flow rate control strategy for coal-fired utility boilers was proposed and implemented in the boiler in which the air flow rate required to the furnace is a function of the unit load.
How can a coal pipe balance primary airflow?
Orifices or adjustable valves installed in the coal pipes are usually employed to balance primaryairflow distribution. Where coal flow imbalance is the result of imbalanced primary airflow, coalflow distribution can be improved by tuning the orifices.
Is air-heat equivalent decoupled in a coal-fired boiler?
Thus, the behavior of the air and coal in a coal-fired boiler is decoupled. The second concept that is proposed is the air-heat equivalent, which is the ratio of the net calorific value of 1 kg of coal to the theoretical air flow rate required for its complete combustion.