Reaction - glycerolem + potassium permanganate

[Numeriprimi]

Hello,
I have a question: Why potassium permanganate reacts with grycerolem as it reacts?
Spontaneous combustion, the violet flame ... I found only a complicated explanation. Please, can you explain it to me simply? Thank you!

 

[Borek]

Hard to tell what explanation you are looking for not knowing what you classified as complicated.

Can you try to summarize the one that you have seen, and explain what you don't get?