| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a xylene separation unit, using two adsorbers A and B connected in series, specifically the xylene separation unit using a circulation stream connecting the bottom of adsorber B to the top of adsorber A and a circulation stream connecting the bottom of adsorber A to the top of adsorber B.SOLUTION: A simulated moving bed xylene separation unit comprises a device for measuring concentration by analyzing a Raman spectrum relating to sampling points, and the device is constituted by two identical and independent routes, called analysis route 1 and analysis route 2, each route having two branches, one called a main branch operating for a majority of the time, and the other called a subsidiary branch operating for a minority of the time.</p> |
