May an Increase of the Effective Migration Rate Observed in Electrostatic Precipitators with Wider Plate Spacings or Faster Gas Streams Really Be Termed “Non-Deutschian”?
Titel:
May an Increase of the Effective Migration Rate Observed in Electrostatic Precipitators with Wider Plate Spacings or Faster Gas Streams Really Be Termed “Non-Deutschian”?
Auteur:
Riehle, Claus Loffler, Friedrich
Verschenen in:
Aerosol science and technology
Paginering:
Jaargang 16 (1992) nr. 1 pagina's 1-14
Jaar:
1992
Inhoud:
In recent years, experimental investigations concerning electrostatic precipitators have repeatedly confirmed an increase in the effective migration rate upon widening the plate-to-plate distance or raising the average gas flow velocity. An increase in the effective migration rate with increasing passage width or gas velocity is interpreted as an improvement in precipitator performance. This seems to contradict the traditional Deutsch equation. As a result, one often refers to these as “non-Deutschian phenomena.” It can be demonstrated that a certain part of the above experimental observations may, indeed, be explained within the scope of the Deutsch concept and hence must not be termed “non-Deutschian.” This is achieved by considering the influence of the particle size distribution when calculating the effective migration rates. These calculations are based on logarithmic Gaussian distributions, without any restriction of their global applicability. The effective migration rates calculated in this manner are presented as a function of the plate spacing and the average gas velocity and are compared with published data. This reveals that the original Deutsch model yields a correct qualitative description of the actual state, although quantitative deviations do, indeed, exist.
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