关键词: 乙酸丁酯, 分隔壁反应精馏塔, 热泵技术, 中间换热, 节能

Abstract:

Integration of vapor recompression heat pump with reactive divided-wall column (RDWC-HP) is proposed for butyl-acetate synthesis process. Three different RDWC-HP schemes are suggested with large differential temperatures between top and bottom streams for butyl-acetate synthesis through esterification reaction. The three schemes are named as RDWC-HP-RD, RDWC-HP-IR and RDWC-HP-PRE-IR, correspondingly. The energy consumption and TAC of the three schemes are optimized and compared with those from the conventional reactive divided-wall column. Calculation results indicate that application of vapor recompression heat pump can significantly reduce energy consumption and TAC of the reactive divided-wall column, and RDWC-HP-PRE-IR scheme can save 35.18% TUC, 71.53% CO2 emission and 35.35% TAC with a payback period of 8 a.

Key words: butyl acetate, reactive divided-wall column, vapor recompression heat pump, intermediate heat transfer, energy-saving