Optimizing the Excess Air Ratio of Coal-Fired Boiler
This paper investigates on optimization problem of excess air ratio of coal-fired boiler by using the following three-step strategy. Firstly, the net efficiency of boiler (NEB) and the Cost of Boiler Heat Production (CBHP) are both taken as the objective functions, and the excess air ratio (EAR) is taken as the input variable. Secondly, the relationship between the objective functions and the EAR is established based on the model of variable working conditions. Finally, the implicit enumeration algorithm is employed to obtain the optimal EAR value that optimizing the objective functions, under the constraints that the EAR must be committed. Three cases of boiler load, such as 100％, 75％ and 50％, are studied. The results show that NEB has the optimal value by using different EAR values. The cost of the boiler thermogenesis is affected not only by the EAR, but also by the coal price and the pool purchase price of thermal power plants. When the pool purchase price is fixed, the EAR has the decreasing trend corresponding to the lowest cost of the boiler thermogenesis in keeping with the economics laws. The calculation result was strongly by the result of the performance optimization test of the boiler.
excess air ratio optimization variable condition
Zhang Yuanshu Wang Peihong Yin Jie
Southeast University of Energy & Environment, Nanjing, Jiangsu, 210096, China Nanjing Nari-Relays Electric Co., Ltd
国际会议
三亚
英文
426-429
2012-01-06（万方平台首次上网日期，不代表论文的发表时间）