What alien, space, sci fi, movie is this?

It's a science fiction space movie. this guy is like in a tent out in the desert and this weird alligator thing raps a tongue around a guy and this other guy saves him and sets it on fire? Don't remember the guy with the tongue around him putting up much of a fight. I vaguely remember an alien baby or something that came from a guy with a metal chest? There was also a guy who got caught on a conveyor belt and he slid through big slow moving fan things and got chopped up and this guy finds his ear later on the conveyor belt? I saw it on the same channel three times at different times in about the same month when I was very young and I'm trying to find out what its called