The main technologies for reducing flue gas heat loss of pulverized coal-fired boilers are introduced, and the suitability of these technologies for boiler operation and the principles for selection of these technolog...The main technologies for reducing flue gas heat loss of pulverized coal-fired boilers are introduced, and the suitability of these technologies for boiler operation and the principles for selection of these technologies are explored. The main conclusions are： 1） the non-equilibrium control over flue gas flow rates at the inlet of the air heater and the reversal rotation of the air heater rotator should be popularized as regular technologies in large boilers; 2） increasing the area of the air heater to reduce the flue gas heat loss in pulverized coal-fired boilers should be the top option and increasing the area of the economizer be the next choice; 3） low- pressure economizer technology could save energy under special conditions and should be compared with the technology of increasing economizer area in terms of technical economics when the latter is feasible; 4） the hot primary air heater is only suitable to the pnlvefizing system with a large amount of cold air mixed.展开更多
将烟气加热器应用于机组脱硝系统,以期降低脱硝系统耗电量。以平顶山姚孟发电有限责任公司#5、#6机组为例,对脱硝系统耗电量偏大的原因进行分析,得出主要影响因素为"脱硝电加热耗热量"。通过增加烟气加热器,将脱硝系统耗电量...将烟气加热器应用于机组脱硝系统,以期降低脱硝系统耗电量。以平顶山姚孟发电有限责任公司#5、#6机组为例,对脱硝系统耗电量偏大的原因进行分析,得出主要影响因素为"脱硝电加热耗热量"。通过增加烟气加热器,将脱硝系统耗电量由5.31×10~5 k Wh降至同行业水平的0.283×10~5 k Wh;通过配置联锁启动电加热逻辑,确保热解炉出口温度在允许范围内。此次技术改造安全、有效,年预计节约成本100万元以上。展开更多
文摘The main technologies for reducing flue gas heat loss of pulverized coal-fired boilers are introduced, and the suitability of these technologies for boiler operation and the principles for selection of these technologies are explored. The main conclusions are： 1） the non-equilibrium control over flue gas flow rates at the inlet of the air heater and the reversal rotation of the air heater rotator should be popularized as regular technologies in large boilers; 2） increasing the area of the air heater to reduce the flue gas heat loss in pulverized coal-fired boilers should be the top option and increasing the area of the economizer be the next choice; 3） low- pressure economizer technology could save energy under special conditions and should be compared with the technology of increasing economizer area in terms of technical economics when the latter is feasible; 4） the hot primary air heater is only suitable to the pnlvefizing system with a large amount of cold air mixed.
文摘将烟气加热器应用于机组脱硝系统,以期降低脱硝系统耗电量。以平顶山姚孟发电有限责任公司#5、#6机组为例,对脱硝系统耗电量偏大的原因进行分析,得出主要影响因素为"脱硝电加热耗热量"。通过增加烟气加热器,将脱硝系统耗电量由5.31×10~5 k Wh降至同行业水平的0.283×10~5 k Wh;通过配置联锁启动电加热逻辑,确保热解炉出口温度在允许范围内。此次技术改造安全、有效,年预计节约成本100万元以上。
