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本文从计算分析着手,结合实际运行情况,对自然循环锅炉的自补偿能力、主要影响因素及停滞与倒流的校验问题进行了探讨,主要论点如下: 一、关于循环系统的自补偿能力循环系统是否具有自补偿能力,可以通过界限循环倍率来衡量。当回路的循环倍率高于界限值时,则具有自补偿能力,反之则丧失自补偿能力。对于一般结构的电站锅炉,其界限循环倍率的数值如下表所示:
This paper starts from the calculation and analysis, and combines with the actual operation, discusses the self-compensation ability, the main influencing factors and the check-out problems of stagnation and backflow of natural circulation boilers. The main points are as follows: 1.The circulation system Whether it has the ability to self-compensation, can be measured by the limit cycle rate. When the loop cycle rate higher than the threshold value, then has the ability to self-compensation, otherwise lost its ability to compensate. For the general structure of power plant boilers, the value of the limit cycle magnification as shown in the following table: