| 摘要 |
<p>PCT No. PCT/IB95/00720 Sec. 371 Date Mar. 7, 1997 Sec. 102(e) Date Mar. 7, 1997 PCT Filed Aug. 31, 1995 PCT Pub. No. WO96/07474 PCT Pub. Date Mar. 14, 1996A method for in-situ modernization of a reactor for urea synthesis at high pressure and temperature of the type wherein a co-current flow of a gaseous phase and a liquid phase takes place, comprising a vertical tubular shell (2) in which is supported a plurality of horizontal perforated plates (6a-6f), calls for the step of providing on at least one of the perforated plates (6a-6f) a plurality of structurally independent caps (8) having at the top a plurality of holes (11) and forming with the plate a plurality of lateral apertures (13). Advantageously, the holes (11) and the apertures (13) define respective preferential paths of the gaseous phase and the liquid phase respectively, to achieve intimate mixing thereof.</p> |
