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热风炉顶温度测量的热电偶,经常损坏。使用寿命低,浪费很大。武钢计器车间经过多次研究,提出了一种改进方案,并在大部分热风炉上进行了三年的试验,结果使热电偶的寿命由原来的1-6天延长到现在的2-6个月,平均在三个月左右。这样每座高炉每年就可为国家节约2～3万元的财富,同时还保证了热风炉顶温度的连续测量,满足了当前生产需要,并为热风炉燃烧自动调节设备的运转创造了条件。一般热风炉顶热电偶损坏的原因,主要是热电偶磁保护管破裂。我们经过长期的观察,发现热风炉顶热电偶磁保护管的损坏与热风炉内热风的流动有很大的关系。如图所示,由于炉顶耐火砖2与铁壳1之间存在着很大的空间,燃烧时拱顶空间的压力很低,转入送风后,拱顶空间与热风炉炉膛的压力差很大,保护套管6与耐火砖2之间的结
Thermocouple temperature measurement of the top of the stove, often damaged. Low life, waste a lot. Wugang meter workshop after many studies, put forward an improvement program, and most of the stove on a three-year trial, the result of the life of the thermocouple from 1-6 days to extend the current 2-6 Month, an average of about three months. In this way, each blast furnace can save 2 ~ 30,000 RMB each year for the state, meanwhile, it also ensures the continuous measurement of the temperature of the hot blast stove to meet the current production needs and creates the conditions for the operation of the automatic stove combustion adjusting equipment. General hot air stove top thermocouple damage is mainly due to the thermocouple magnetic protection tube rupture. After a long period of observation, we found that the damage of the thermocouple protection tube on the top of the hot blast stove has a great relationship with the flow of the hot blast in the hot blast stove. As shown in the figure, since there is a large space between the top firebrick 2 and the iron shell 1, the pressure in the vault space when burning is very low, the pressure difference between the vault space and the furnace hearth Large, protective sleeve 6 and refractory brick 2 between the knot