| 摘要 |
<p>The present invention relates to sieve plates made of polymeric material suitable for use in distillation columns. The sieve plate of polymeric material comprises:
(a) a circular base provided with
(i) a central axial aperture for receiving a shaft,
(ii) an additional aperture for receiving a tubular member, and (iii) perforations of uniform average diameter which represent in total a free area of between 3 and 20%,
(b) a flexible, flared-lip around the circumference of the base to form a sealing contact with the inner walls of a column, and
(c) means for retaining the sieve plate on a shaft. The sieve plate affords great flexibility because the number of plates and the spacing between the plates in a column can be adjusted as desired and the plates can be mass produced. </p> |
