Vacuming out the dust from prehistoric Earth's atmosphere

I have dinosaurs, I have an asteroid I want to save the dinosaurs from the asteroid, but I'm not allowed to use the giant laser again, after that incident in Alderaan. So I have only one chance left...

The Giant Housemaid mech.

I want to make things sure, so I need a vacuum cleaner that is big and strong enough to suck out half of the current Earth's atmosphere under a week. I also want to make sure that the dinosaurs don't get killed so, it's important to know, What effects would this vacuum cleaner have in the planet's weather? (this implies, that the air gets filtered then immediately returned to the atmosphere.

There were other factors to the extinction, but let's focus on the more pressing matters at hand.

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Vacuming out the dust from prehistoric Earth's atmosphere

The Giant Housemaid mech.

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