问题
单项选择题
切除循环氢脱硫塔退料、吹扫前首先需要做的步骤是（）。
A、循环氢气体改旁路
B、停液力透平
C、循环氢脱硫塔撇油
D、循环氢气体放火炬
答案
参考答案：A
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切除循环氢脱硫塔退料、吹扫前首先需要做的步骤是（）。
A、循环氢气体改旁路
B、停液力透平
C、循环氢脱硫塔撇油
D、循环氢气体放火炬
参考答案：A
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