Centrifugal collectors, also known as cyclone separators, are devices used to separate solid particles from a gas or liquid stream. These collectors utilize centrifugal force to separate the particles from the fluid stream, allowing for a cleaner fluid output. There are generally two main types of centrifugal collectors: single-cyclone and multi-cyclone collectors.

1. Single-Cyclone Collectors:
Single-cyclone collectors consist of a single cylindrical body with a tangential inlet and a central outlet. The fluid stream enters the cyclone tangentially, creating a vortex motion. As the fluid rotates, centrifugal force pushes the heavier particles towards the outer wall of the cyclone. These particles then slide down the wall and are collected at the bottom of the cyclone, while the cleaned fluid exits through the central outlet. Single-cyclone collectors are simple in design and are typically used for larger particle sizes.

2. Multi-Cyclone Collectors:
Multi-cyclone collectors consist of multiple cyclones arranged in parallel or series. Each cyclone operates in a similar manner to the single-cyclone collector, but by having multiple cyclones, the collection efficiency is increased. The fluid stream is divided among the cyclones, allowing for better particle separation. Multi-cyclone collectors are commonly used for smaller particle sizes and can achieve higher collection efficiencies compared to single-cyclone collectors.

In summary, there are two main types of centrifugal collectors: single-cyclone and multi-cyclone collectors. Single-cyclone collectors have a single cylindrical body and are used for larger particle sizes, while multi-cyclone collectors consist of multiple cyclones and are used for smaller particle sizes.