摘要:
The invention concerns a simulated moving bed adsorption separation device comprising a limited number of large diameter valves. According to the invention, the device comprises a column with a plurality of sectors Sk with 2 superimposed plates Pi with a single distribution network, each sector Sk comprising an external principal bypass line Lk connected to each plate Pi of Sk via a large diameter plate valve Vi and an external secondary bypass line Mk comprising a small diameter valve VMk connected to the adjacent sector Sk−1. Each line Lk comprises a flow rate limitation means and is connected to each fluid network via a single large diameter valve. Further, the connectors of lines Lk onto the column are offset by at most 20° inside Sk to limit the volume of lines Lk, and are offset by a mean angle in the range 70° to 110° between two neighbouring sectors Sk and Sk+1 so as not to weaken the column mechanically. The plates preferably comprise panels DMEi,j with parallel segments the direction of which varies from plate to plate or per group of 2 plates.The invention also concerns a separation process using said device.
摘要:
The present invention describes a novel configuration for simulated moving bed separation processes characterized by using two adsorbers each containing 12 beds, these two adsorbers functioning in parallel. This novel configuration can be used to optimize para-xylene production.
摘要:
Process for separation of a feedstock F by adsorption in a simulated moving bed in an SMB device that comprises a zone 1 for desorption of compounds produced by extraction, a zone 2 for desorption of compounds produced with a raffinate, a zone 3 for adsorption of compounds produced by extraction, and a zone 4 that is located between the draw-off of the raffinate and the supply of the desorbent,whereby the device comprises external bypass lines Li/i+1 directly joining two successive plates Pi, Pi+, that are equipped with non-automated means for adjusting flow rate and closing means, in which the degree of opening of the restriction means of the scavenging flow rate of the bypass lines Li/i+1 is adjusted so as to obtain the best performance of the SMB.
摘要翻译:在SMB装置的模拟移动床中通过吸附分离原料F的方法,其包括用于解吸由萃取物生产的化合物的区域1,用萃余液生产的化合物解吸区域2,用于吸附化合物的区域3 通过提取产生的区域4和位于萃余液的抽出物和解吸剂的供应之间的区域4,由此该装置包括直接连接两个连续的板Pi,Pi +的外部旁路管线Li / i + 1,其配备 用于调节旁路管线Li / i + 1的清除流量限制装置的开度的调节流量和关闭装置的非自动化装置,以获得SMB的最佳性能。
摘要:
The invention concerns a process for producing high purity meta-xylene, comprising a step for separation by simulated moving bed adsorption starting from an aromatic C8 feed delivering a fraction which is rich in meta-xylene and a fraction which is depleted in meta-xylene, and a step for crystallization of the meta-xylene rich fraction. The purity of the meta-xylene produced is at least 99.5%.
摘要:
A process for separating a feed F by simulated moving bed adsorption in a SMB device comprises external bypass lines Li/i+1 which directly connect two successive plates, Pi, Pi+1, the index “i” being either even or (exclusive of the foregoing) odd, along the whole length of the column, allowing said plates to be flushed, in which each of the bypass lines Li/i+1 comprises automated means for regulating the flow rate in the bypass lines, the bypass lines in certain cases being subject to a flushing flow during injection or withdrawal operations.
摘要翻译:通过SMB装置中的模拟移动床吸附分离进料F的方法包括直接连接两个连续板Pi,Pi + 1的外部旁路管线Li / i + 1,指数“i”为偶数或(不包括 上述)奇数,沿柱的整个长度,允许所有的板被冲洗,其中每个旁路管线Li / i + 1包括用于调节旁路管线中的流量的自动装置,旁路管线在某些 在注射或抽出操作过程中,这种情况需要冲洗。