260t/h焦煤混烧CFB锅炉燃烧控制策略优化  

Optimization on Combustion Control Strategy for a 260t/h Coking Coal Co-firing CFB Boiler

作　　者：贺悦科[1] 田晓兰 邹包产[1] 赫尔东 

机构地区：[1]华北电力科学研究院(西安)有限公司,西安710065 [2]长岭炼化岳阳机电技术有限公司,岳阳414012 [3]北京京丰燃气发电有限责任公司,北京100074

出　　处：《发电设备》2014年第1期23-26,共4页Power Equipment

摘　　要：结合一台260t/h CFB锅炉燃用石油焦的实践经验,介绍了锅炉设备及系统工艺流程;并针对锅炉控制系统的控制目标和难点,提出了增加主蒸汽压力设定值微分、汽包压力微分、能量需求基准函数等锅炉主控的前馈修改方案;并对一次风、二次风,以及床温控制等系统的控制方案进行了完善和优化。结果表明:负荷扰动5MW时蒸汽压力动态偏差最大0.55MPa,床温变化小于25K,满足标准要求。A boiler system and its process flow were introduced in combination with the practical experience of burning petroleum coke in a 260 t/h CFB boiler. Aiming at the control objectives and difficulty of the boiler control system, a boiler master feedforward modification scheme was put forward, such as adding main steam pressure set value differential, drum pressure differential, and energy demand baseline function, etc. Moreover, control schemes for primary air, secondary air and bed temperature control systems were improved and optimized. Results show that the maximum dynamic deviation of steam pressure is only 0.55 MPa and the change of bed temperature is less than 25 K, under the load disturbance of 5 MW, which meets the requirements of relevant standards.

关 键 词：CFB锅炉 焦煤混烧 前馈 能量需求 床温 一次风 

分 类 号：TK229.66[动力工程及工程热物理—动力机械及工程]