Luke has it, “Whose fan is in his hand, and he will throughly purge his floor, and will gather the wheat into his garner; but the chaff he will burn with fire unquenchable.” (Luke 3:17)
BTW, until the 20th century, the word fire in the minds of men meant both heat and light. Now we think of it as heat only. Many places in the bible where the original text is translated “fire”, could today be translated “light”.
Not that this is one of those, though the unquenchable fire could be the light of God’s holiness.
All that is basically special pleading. The fire is not simply a blast furnace but unquenchable in the everlasting destruction the wicked shall be punished with.
And the smoke perpetually ascending indicates the evidence of their everlasting ongoing destruction.
And the Lord knew how souls would understand His language, and simply being burnt up after a life of fulfiling lusts versus "having two feet to be cast into hell, into the fire that never shall be quenched: Where their worm dieth not, and the fire is not quenched." (Mark 9:45-46)
But if you cannot see ongoing destruction being conveyed by this and being cast into the same place as the devil and his angels, etc., then i doubt there is more i should say. Over and out.