Method and apparatus for separating particles from hot gases

Abstract

A centrifugal separator assembly, which is attached to a fluidized bed reactor for separating solid particles from gas exhausted from a reaction chamber of the fluidized bed reactor, includes a vortex chamber. The vortex chamber is in a horizontal direction defined by vertically-extending outer walls formed of planar water tube panels, the inside of the outer walls being at least partly provided with a refractory lining and defining a gas space in the vortex chamber, where at least one vertical gas vortex is established. The separator assembly also includes at least one inlet for introducing gas into the gas space from the reaction chamber, at least one outlet for discharging purified gas from the gas space, and at least one outlet for discharging separated solid particles from the gas space. In the separator assembly, the vertically-extending outer walls of the vortex chamber form at least one corner, with the angle between the sides of the corner exceeding ninety degrees, and the corner being rounded by a refractory lining on the inside of the outer walls. A method of separating solid particles from exhausted gas with a high degree of particle separation is also provided. In the method, which includes providing a separator assembly as described above, exhausted gas in the vortex chamber is brought to hit at least one corner rounded by the refractory lining on the inside of the outer walls, and the angle between the vertically-extending outer walls of the corner exceeds ninety degrees.