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在具有不同急冷系统的热裂解模拟装置上进行石脑油裂解模拟对比试验,比较分析其产物收率及结焦量,得出急冷方式采用依次向裂解气注入急冷水和循环气体产品的热裂解模拟装置冷却效率高,可实现高温裂解气的快速急冷,气液相产物分离更充分,烧焦持续时间短,炉管结焦量少,可更准确模拟工业裂解炉;还可依据不同裂解工艺参数调节急冷水的注入量,提高装置的操作可控性。同时将注水管插入裂解炉管一端的端部设计成圆锥形,注水孔均匀设置在圆锥形端部的底面圆周上,可有效抑制注水孔附近结焦,裂解模拟装置实现正常长周期运转。
In a pyrolysis simulation device with different quench systems, a comparative simulation test of naphtha cracking was carried out to compare and analyze the yield of products and the amount of coking. The results showed that the thermal cracking simulation of injecting quench water and recycle gas products into pyrolysis gas in turn was obtained The cooling efficiency of the device is high, so that the rapid quenching of pyrolysis gas at high temperature can be realized, the gas-liquid phase separation is more fully, the duration of charring is short, the coke amount of the furnace tube is small, the industrial pyrolysis furnace can be simulated more accurately, and the pyrolysis gas can be adjusted according to different pyrolysis process parameters Chilled water injection volume, improve device operation controllability. At the same time, the end of the water injection pipe inserted into the cracking furnace tube is designed to be conical. The water injection holes are uniformly arranged on the circumference of the bottom of the conical end, which can effectively restrain the coking in the water injection hole, and the cracking simulation device can realize normal long-period operation.