Treatment system and treatment process for treating oil sludge thermal washing volatile waste gas

The treatment system comprises a demister, a non-condensable gas fan, a condensate tank, a water chilling unit, a two-phase centrifugal machine, a recovery water tank, a recovery oil tank and a waste gas condenser, wherein the waste gas condenser is used for communicating volatile waste gas generated by each heating tank body through a volatile waste gas pipe; the treatment process comprises the following steps: carrying out negative pressure collection on volatile waste gas generated by each heating tank body through a volatile waste gas pipe by a non-condensable gas fan, conveying the collected volatile waste gas to a waste gas condenser for heat exchange, and collecting condensate into a condensate tank; uncondensed gas in the waste gas condenser enters a demister to be dehydrated again and enters a condensate tank; condensate in the condensate tank is conveyed to the two-phase centrifugal machine to be subjected to oil-water two-phase separation, separated recycled water enters the recycled water tank, se