What method is used to remove solids in flue gas for BFBs?

The method used to remove solids in flue gas for bubbling fluidized beds (BFBs) is through a cyclone after the economizer. This process effectively separates particulates from the flue gas stream by utilizing the centrifugal force generated within the cyclone. As the flue gas enters the cyclone at a tangent, it creates a spinning motion, which forces heavier solid particles to the outer wall and collects them at the bottom.

This method is particularly suitable for BFB systems, as it efficiently handles the ash and other particulates produced during combustion. The design of the cyclone allows for minimal pressure drop, which is important in maintaining overall system efficiency.

In contrast, filter bags and scrubber systems, while effective for certain applications, do not primarily operate within the specific context of a BFB's flue gas handling as effectively as a cyclone. Filter bags capture particulates passing through the gas stream, but they may require more maintenance and face limitations in high-temperature and high-moisture environments. Scrubber systems typically focus on removing gaseous pollutants using liquids, and while they may capture particulates, their primary function is not centered on solid removal in the context of BFB operations.

Water cooling tanks are utilized for other purposes, such as cooling