How do centrifugal collectors primarily remove particulates from flue gas?

Centrifugal collectors, also known as cyclones, primarily utilize the principles of centrifugal force and inertia to remove particulates from flue gas. When flue gas enters the collector, it is forced into a spiral motion. This rotation causes heavier particles to move outward due to centrifugal force, effectively separating them from the gas stream. The inertia of the particles helps to maintain their movement towards the outer wall of the collector, where they can then fall into a hopper or are otherwise collected. This method is efficient for separating larger particles from gas streams, making it a common choice in various industrial applications for particulate removal.

In contrast, the other methods listed involve different mechanisms that are not the primary means by which centrifugal collectors function. Electrical charges relate to electrostatic precipitators, a different technology. A vacuum effect is generally associated with other types of collectors or filtration systems, while unbalanced forces might refer to a broader range of mechanical principles rather than the specific functioning of centrifugal collectors. Understanding the role of centrifugal force and inertia clarifies why this particular choice is the most accurate description of how these collectors operate.