When the incinerator is stopped, which of the following is wrong?（）
After stopping supplying sludge oil, the value and pipe should be flushed by flushed by diesel oil and the incinerator continue burning for 10 minutes
B. Close auxiliary burner firstly and then close main burner
C. After stopping fuel, restoring the position of main fuel supply valve
D. Stop blower as soon as stopping supplying fuel oil
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