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(一) 煤粉锅炉二次风风速挡板开度优选锅炉燃烧得好坏,其中重要因素之一就是二次风速。原来各运行班的操作均不一致,但大部分都控制在第六格以内,燃烧极不稳定,煤耗也高,现对二次风风速进行优选。采用方法:分数法(8/13)。试验经过:点①选第8格,经热工计算,锅炉效率是87.52％,标准煤耗528克/度;点②选第5格,经热工计算,锅炉效率是85.94％,标准煤耗537克/度。显然点①比点②好。再做点③,选
(A) Pulverized coal boilers Second wind speed baffle opening Boiler combustion is good or bad, one of the important factors is the secondary wind speed. The operation of the original operation of the classes are not the same, but most of them are controlled within the sixth grid, the combustion is extremely unstable, coal consumption is high, the secondary wind speed is preferred. Adoption method: Fractional method (8/13). The test passes: ① select the eighth grid, calculated by the thermal calculation, the boiler efficiency is 87.52%, the standard coal consumption 528 g / degree; point ② choose the fifth grid, the thermal calculation, the boiler efficiency is 85.94%, the standard coal consumption 537 grams /degree. Obviously point ① better than point ②. Do ③, choose