自激励脉动燃烧式锅炉设计方法

A Method for the Design of Self-excited Pulsation-combustion Boilers

将自激励脉动燃烧技术应用于锅炉,既能够提高锅炉热工性能,又能够降低其烟气污染物的排放量。针对这一问题,进行了有关脉动锅炉设计的理论研究和实验证明,在分析脉动燃烧技术应用于锅炉领域所受制约的基础上,分别给出了脉动锅炉设计准则:燃烧器应位于流动通道距风机入口1/4位置,各烟管横截面积之和为炉膛截面积的20%～30%,尾管直径由脉动频率确定,气流通道的各有效流通面积应相等。按照上述准则设计制造了脉动锅炉并进行热工性能试验,出力比同体积的普通0.5t/h锅炉提高近40%,体现出较好的热工性能。

The use of self-excited pulsation combustion technology to a boiler can not only enhance its thermodynamic performance but also reduce its emission of flue gas pollutants.Concerning this issue,a theoretical study of pulsation boiler design and its experimental verification has been performed.On the basis of analyzing the restrictions encountered during the use of the pulsation combustion technology to boilers,the pulsation boiler design criteria can be given as follows:the burners should be located at a flow passage 1/4 length of distance from the fan inlet,the total area of the cross sections of various flue pipes should be 20% to 30% of the cross section area of the furnace with the diameter of a tail pipe being determined by the pulsation frequency.The effective flow area of various gas flow passages should be equal.According to the above design criteria,a pulsation boiler has been designed and manufactured and a thermodynamic performance test conducted.The steam output of the boiler has increased by nearly 40% when compared with a 0.5 t/h conventional boiler having the same volume,thus exhibiting a comparatively good thermodynamic performance.