Patent ID: 6869459

Claim:
An apparatus for separating solids from a flow of flue gas in a circulating fluidized bed (CFB) boiler, comprising: a plurality of vertical, impact type particle separators located within the CFB, the impact type particle separators being adjacently positioned and horizontally spaced from one another in a plurality of staggered rows, each impact type particle separator including at least one vertical cooled support tube for conveying a cooling medium therethrough, and a plurality of hung elements which are supported from the at least one support tube, the plurality of hung elements cooperating with one another at adjacent ends thereof to form a collecting channel which opens toward the flow of flue gas along the length of the support tube; and wherein each hung element includes two mutually inverted U-shaped parts, the first U-shaped part open towards the oncoming flow of flue gas and the second U-shaped part embracing the support tube, and wherein the first U-shaped part is shifted relative to the second U-shaped part by some fraction of a height of the hung element.