Gas separation: processes – Electric or electrostatic field – Continuously moving electrode
Patent
1992-04-16
1994-01-11
Nozick, Bernard
Gas separation: processes
Electric or electrostatic field
Continuously moving electrode
96 94, 96 96, B03C 310
Patent
active
052777030
ABSTRACT:
Method and apparatus for removing radon decay products wherein a fan directs air through a conductive cylinder that is grounded. Positioned axially within the cylinder is one or more cylindrical brushes, each having a shaft and radially extending conductive bristles with distal ends spaced from the cylinder. The shaft is connected to the fan so that the bristles rotate. Also, a static electric potential is applied to the bristles. The relative motion of the air and bristles is particularly effective at enhancing molecular diffusion to cause small unattached radon decay products to plate out on the bristles. In contrast, the electrostatic charging of the bristles and the resulting diffusion charging is particularly effective at exerting a force on larger particles to which radon decay products are attached thus causing the particles to migrate and plate out on the cylinder.
REFERENCES:
patent: 1067974 (1913-07-01), Cottrell
patent: 1507687 (1924-09-01), Schmidt
patent: 1980521 (1934-11-01), Hahn
patent: 2556982 (1951-06-01), Roos et al.
patent: 4596585 (1986-02-01), Moeller et al.
Aisenberg Sol
Sklenak John S.
Clark William R.
Nozick Bernard
Raytheon Company
Sharkansky Richard M.
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