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一、关于结焦熄火问题沸腾燃烧锅炉在运行期,由于操作水平不高,没有掌握燃料特性和流化床燃烧的规律,一般都容易产生结焦和熄火。要防止结焦熄火,需先了解结焦和熄火形成的原因。流化床层中结焦有两种现象:一是“高温结焦”,就是床内料层中温度超过了煤的灰熔点t_1,使整个炉排结了一层焦。焦渣的表面有一层玻璃化的熔渣,很坚硬,又不易捣碎。根据我省煤种情况,一般烧无烟煤、石煤和炉渣时,床层温度超过1100—1150℃,就会发生“高温结焦”。
First, on the problem of coke off Boiling and burning boilers in operation, due to the operation is not high, did not grasp the characteristics of the fuel and the fluidized bed combustion law, are generally prone to coking and flameout. To prevent coking flameout, you need to know the cause of coking and flameout. There are two phenomena of fluidized bed coking: First, “hot coking”, that is, the bed material temperature exceeds the ash ash melting point t_1, so that the entire grate a layer of coke. The surface of the coke slag has a layer of vitrified slag, which is very hard and not easily broken. According to the situation in our province coal, the general burning anthracite, stone coal and slag, the bed temperature exceeds 1100-1150 ℃, there will be “high temperature coke.”