The char types of the various macerals and their combustion modes were investigated in detail according to the drop tube furnace and one-dimension coal combustibility tests.

本文依据沉降炉和一维煤粉燃烧特性试验，对不同显微组分的残炭类型及其燃烧方式进行了详尽的探讨。

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In the light of bending of radiation tube in cracking furnace, analysis is done in detail to present related prevention, adjustment and correction measures.

针对乙烯装置裂解炉运行中比较普遍存在的辐射段炉管弯曲现象进行了详尽的分析并提出了相应的预防、调整和矫正对策。

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