In CDRS, it is desirable that the accelerated movement time-consumed of the coal particle motion should be approximately ignored.
In CDRS, the mechanism of dust removal is mainly depended on a dust separated by centrifugal force and the dust captured by water surface.
In CDRS, the coal particle falling is necessary, and its falling time is less than its moving time from the inlet to the outlet in axial direction.
In CDRS, the higher the air current axial velocity is, the larger the limited radius of escaping coal particle, and vice versa is.
In CDRS, not only the coal particle is controlled by its centrifugal force, but also controlled by drag force of the airflow.
In CDRS, the motion of a dust particle transported by the spiral air current is controlled by the force, which has axial, radial and tangential components.
Therefore putative CREs in CDRs are not necessarily under a higher selection pressure than are the randomly selected short k-mers in CDRs.
If the spiral blade is rotating, an interesting phenomenon will appear in CDRS of DCCP.
Open image in new window Fig. 2 Sketch of separation process of dust cloud in CDRS.
Secondly, the polluted air current in CDRS is constrained by the driven cyclone passageway, and the velocity components of air current has axial, radial and tangential, so the air current in CDRS is transformed to a spiral air current.
