Industrial coal-fired boiler is an important air pollutant emission source in China. The chain-grate boiler is the most extensively used type of industrial coal-fired boiler. An electrical low-pressure impactor, and a...Industrial coal-fired boiler is an important air pollutant emission source in China. The chain-grate boiler is the most extensively used type of industrial coal-fired boiler. An electrical low-pressure impactor, and a Dekati？ Low Pressure Impactor were applied to determine mass and number size distributions of PM10 at the inlet and the outlet of the particulate emission control devices at six coalfired chain-grate boilers. The mass size distribution of PM10 generated from coal-fired chain-grate boilers generally displays a bimodal distribution that contains a submicron mode and a coarse mode. The PM in the submicron mode for burning with raw coal contributes to 33% ± 10 % of PM10 emissions, much higher than those for pulverized boilers. And the PM in the submicron mode for burning with briquette contributes up to 86 % of PM10 emissions. Multiclones and scrubbers are not efficient for controlling PM10 emission. Their average collection efficiencies for sub-micron particle and super-micron particle are 34% and 78%, respectively. Operating conditions of industrial steam boilers have influence on PM generation. Peak of the submicron mode during normal operation period is larger than the start-up period.展开更多
燃煤链条锅炉汽包水位控制是工业锅炉正常运行的一个重要参数,也是燃煤链条锅炉节能降耗、提高产气率的重要指标.目前汽包水位的控制方式基本上采用传统PID(proportional integral derivative)控制,但因系统的复杂性以及参数不确定性,...燃煤链条锅炉汽包水位控制是工业锅炉正常运行的一个重要参数,也是燃煤链条锅炉节能降耗、提高产气率的重要指标.目前汽包水位的控制方式基本上采用传统PID(proportional integral derivative)控制,但因系统的复杂性以及参数不确定性,控制效果不尽人意.利用模糊控制鲁棒性强、适应性好以及PID控制精度高的特点,采用模糊PID(Fuzz-PID)控制器进行控制.通过仿真实验,结果表明,系统的实时性、稳定性和鲁棒性都得到了提高,控制效果令人满意.展开更多
基金Acknowledgements This study was supported by the National Natural Science Foundation of China （Grant Nos. 41275121 and 41575119） and the National Key Basic Research and Development Program of China （No. 2013CB228505） and Beijing Municipal Science ＆ Technology Commission （Grant No. Z161100000716004）.
文摘Industrial coal-fired boiler is an important air pollutant emission source in China. The chain-grate boiler is the most extensively used type of industrial coal-fired boiler. An electrical low-pressure impactor, and a Dekati？ Low Pressure Impactor were applied to determine mass and number size distributions of PM10 at the inlet and the outlet of the particulate emission control devices at six coalfired chain-grate boilers. The mass size distribution of PM10 generated from coal-fired chain-grate boilers generally displays a bimodal distribution that contains a submicron mode and a coarse mode. The PM in the submicron mode for burning with raw coal contributes to 33% ± 10 % of PM10 emissions, much higher than those for pulverized boilers. And the PM in the submicron mode for burning with briquette contributes up to 86 % of PM10 emissions. Multiclones and scrubbers are not efficient for controlling PM10 emission. Their average collection efficiencies for sub-micron particle and super-micron particle are 34% and 78%, respectively. Operating conditions of industrial steam boilers have influence on PM generation. Peak of the submicron mode during normal operation period is larger than the start-up period.
文摘燃煤链条锅炉汽包水位控制是工业锅炉正常运行的一个重要参数,也是燃煤链条锅炉节能降耗、提高产气率的重要指标.目前汽包水位的控制方式基本上采用传统PID(proportional integral derivative)控制,但因系统的复杂性以及参数不确定性,控制效果不尽人意.利用模糊控制鲁棒性强、适应性好以及PID控制精度高的特点,采用模糊PID(Fuzz-PID)控制器进行控制.通过仿真实验,结果表明,系统的实时性、稳定性和鲁棒性都得到了提高,控制效果令人满意.
