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加氢裂化装置空冷器A101,自1986年投产到1988年4月,换热效率明显下降.在投产初期,开一半风机即可满足冷后温度指标,现在全开风机也不能满足工艺要求.原先估计是反应流出物中的氨盐在空冷管束中沉积,用80℃热水冲洗管内,管外用压缩风将灰尘等杂物吹掉,但效果不好.8月份随环境温度的升高,空冷器出口温度升高到75℃,最高时达88℃,直接影响了循环氢压缩机C101的正常运转.停工检查发现管内结垢厚度达1～2mm,12月份装置大修时,垢物厚度又有增加,最厚处达2.5mm,垢
Hydrocracking unit air cooler A101, from 1986 put into operation in April 1988, the heat exchange efficiency dropped significantly.In the early production, open half of the fan can meet the cold temperature indicators, and now fully open fan can not meet the technical requirements of the original It is estimated that the ammonia salt in the effluent is deposited in the air-cooled tube bundle, rinsing the tube with hot water at 80 ° C, and compressing the air outside the tube to blow off the dust and other contaminants, but the effect is not good.According to the increase of ambient temperature in August, The exit temperature of the device increased to 75 ° C and the maximum reached 88 ° C, which directly affected the normal operation of the recycle hydrogen compressor C 101. The stoppage inspection revealed that the fouling thickness in the pipe reached 1 ~ 2mm. When the device was overhauled in December, Increase, the thickest at 2.5mm, scale