CAJ | 학술논문

鉴于间歇精馏热力学效率低的缺点，提出带有内部热集成的多储罐间歇精馏全回流操作（IHIMVBD）分离二元混合物的新型操作方式。在该操作中，多储罐间歇精馏塔被同轴的夹套式再沸器环绕，利用安装在再沸蒸汽管线上的压缩机使精馏塔的操作压力高于夹套式再沸器，使热量通过精馏塔壁面从高压的精馏塔传向低压的再沸器，实现热量的内部集成。为了进一步提高热力学效率和经济效益，将塔顶蒸汽再压缩技术应用于 IHIMVBD，构成强化的内部热集成多储罐间歇精馏全回流操作（Int-IHIMVBD）。该操作能额外利用被压缩的塔顶蒸汽的潜热供给塔釜料液再沸，实现塔顶蒸汽与塔釜料液的热集成。通过模拟分离乙醇-正丙醇的实例表明，相比MVBD和IHIMVBD，Int-IHIMVBD能显著提高分离过程的热力学效率和经济效益。
감우간헐정류열역학효솔저적결점，제출대유내부열집성적다저관간헐정류전회류조작（IHIMVBD）분리이원혼합물적신형조작방식。재해조작중，다저관간헐정류탑피동축적협투식재비기배요，이용안장재재비증기관선상적압축궤사정류탑적조작압력고우협투식재비기，사열량통과정류탑벽면종고압적정류탑전향저압적재비기，실현열량적내부집성。위료진일보제고열역학효솔화경제효익，장탑정증기재압축기술응용우 IHIMVBD，구성강화적내부열집성다저관간헐정류전회류조작（Int-IHIMVBD）。해조작능액외이용피압축적탑정증기적잠열공급탑부료액재비，실현탑정증기여탑부료액적열집성。통과모의분리을순-정병순적실례표명，상비MVBD화IHIMVBD，Int-IHIMVBD능현저제고분리과정적열역학효솔화경제효익。
Batch distillation is a highly energy inefficient process. To reduce its energy consumption, an internal heat integrated multivessel batch distillation with constant total reflux operation (IHIMVBD) is proposed for separation of binary mixtures. The rectifier surrounded by a jacketed reboiler concentrically is operated at a higher pressure compared to that in the jacketed reboiler, so the heat transfers from the high pressure rectification tower to the low pressure still through the internal wall. For this purpose, an isentropic compression system is installed in the reboiled vapor line. In order to improve the thermodynamic and economic performance, an intensified IHIMVBD (Int-IHIMVBD) scheme is developed by introducing overhead vapor recompression mechanism in the IHIMVBD structure. This scheme is to additionally utilize the latent heat of compressed overhead vapor for vaporizing the reboiler liquid. The features of the IHIMVBD system and its intensified form are illustrated by separating a binary mixture of ethanol andn-propanol. The Int-IHIMVBD configuration shows promising energy saving and economic potential over the IHIMVBD and MVBD.