The oven explosion must be a human error.
From the structure of the oven, there is no possibility of explosion. Only flammable gas has accumulated in the oven to a certain concentration, and the electrical structure of the oven has no explosion-proof measures.
The oven is not designed for explosion protection, ordinary ovens are not allowed to dry items with volatile flammable materials.
One type of oven is vented and flammable gases do not accumulate. Even if such an oven is used to dry such dangerous goods, care must be taken. Before the articles enter the oven, they will not allow too much combustibles to be brought in, and should be pretreated. And you should also activate the exhaust before you can put such items. The door should not be closed tightly at the beginning of drying.