厂用电监控系统ECS(Electric Control System)纳入集散控制系统DCS(Distributed Control System)在2×300MW机组脱硫发电厂获得成功应用。通过分析表明,ECS组网方案的优化及通信规约的恰当选择,不仅完全满足DCS通过ECS对参与顺序控...厂用电监控系统ECS(Electric Control System)纳入集散控制系统DCS(Distributed Control System)在2×300MW机组脱硫发电厂获得成功应用。通过分析表明,ECS组网方案的优化及通信规约的恰当选择,不仅完全满足DCS通过ECS对参与顺序控制的电气量进行软采集和控制的要求,还能在建设中节约投资,在生产运行过程中减少运行及维护的工作量,提高电气设备的管理水平。展开更多
Ash deposition is a form of particulate fouling, and appears usually in boiler economizers. The ash deposition increases capital expenditure, energy input and maintenance costs. An analog experiment for monitoring ash...Ash deposition is a form of particulate fouling, and appears usually in boiler economizers. The ash deposition increases capital expenditure, energy input and maintenance costs. An analog experiment for monitoring ash deposition was performed from the analogous objective of a 410 t/h boiler economizer to verify the rationality and reliability of the ash-deposition-monitoring model presented in order to increase the security and economy in economizer running. The analog experiment platform is a tube-shell exchanger that conforms well to the conditions of a self-modeling area. The analog flue gas in the shell side is the heated air mixed with ash, and in the tube side the fluid is water heated by the flue gas. The fluid state in the water side and the flue gas side follows the second self-modeling area. A 4-factor-3-level orthogonal table was used to schedule 9 operation conditions of orthogonal experiment, with the 4 factors being heat power, flue gas velocity, ashes grain diameter and adding ashes quantity while the three levels are different values due to different position classes in every factor. The ash deposition thermal resistances is calculated by the model with the measure parameters of temperature and pressure drop. It shows that the values of the ash deposition thermal resistances gradually increase up to a stable state. And the experimental results are reliable by F testing method at α= 0.001. Therefore, the model can be applied in online monitoring of ash deposition in a boiler economizers in power plants and provides scientific decision on ash deposition prediction and sootblowing.展开更多
文摘厂用电监控系统ECS(Electric Control System)纳入集散控制系统DCS(Distributed Control System)在2×300MW机组脱硫发电厂获得成功应用。通过分析表明,ECS组网方案的优化及通信规约的恰当选择,不仅完全满足DCS通过ECS对参与顺序控制的电气量进行软采集和控制的要求,还能在建设中节约投资,在生产运行过程中减少运行及维护的工作量,提高电气设备的管理水平。
文摘Ash deposition is a form of particulate fouling, and appears usually in boiler economizers. The ash deposition increases capital expenditure, energy input and maintenance costs. An analog experiment for monitoring ash deposition was performed from the analogous objective of a 410 t/h boiler economizer to verify the rationality and reliability of the ash-deposition-monitoring model presented in order to increase the security and economy in economizer running. The analog experiment platform is a tube-shell exchanger that conforms well to the conditions of a self-modeling area. The analog flue gas in the shell side is the heated air mixed with ash, and in the tube side the fluid is water heated by the flue gas. The fluid state in the water side and the flue gas side follows the second self-modeling area. A 4-factor-3-level orthogonal table was used to schedule 9 operation conditions of orthogonal experiment, with the 4 factors being heat power, flue gas velocity, ashes grain diameter and adding ashes quantity while the three levels are different values due to different position classes in every factor. The ash deposition thermal resistances is calculated by the model with the measure parameters of temperature and pressure drop. It shows that the values of the ash deposition thermal resistances gradually increase up to a stable state. And the experimental results are reliable by F testing method at α= 0.001. Therefore, the model can be applied in online monitoring of ash deposition in a boiler economizers in power plants and provides scientific decision on ash deposition prediction and sootblowing.
