The intensified heat integrated technology can be applied to the distillation column to improve the utilization of energy resources in the chemical separation processes. For further improving the energy efficiency of the hydrocarbon mixture distillation separation process, a novel two-parts heat integrated dividing wall column (DWC) with middle vapor recompression (MVRC) is proposed in this paper. Differed by the position of vapor recompression, above or beneath the dividing wall in the column, two configurations of MVRC assisted DWC (MVRC-DWC) were developed and comprehensively evaluated by energy, exergy, economic and environmental impact (4E) analysis, with comparison to the existing vapor recompression assisted dividing wall column (VRC-DWC) and a very competitive improved heat integration of VRC-DWC (IHI-VRC-DWC). Moreover, the heat integration between the pre-separated column and different DWC configurations are carefully designed and also evaluated by 4E analysis. Comparatively, the CRS-MVRC-DWC can supply more latent heat of the vapor to the pre-separated column, consequently the process has the largest energy saving and lowest exergy consumption and exergy loss than the other configurations. The TAC saving of process with CRS-MVRC-DWC can reach to the highest value of 25.72%.

可以将强化的热集成技术应用于蒸馏塔，以提高化学分离过程中能源的利用率。为了进一步提高烃类混合物蒸馏分离工艺的能效，提出了一种新型的两部分热合并中间蒸气再压缩的分隔壁塔（MVRC）。根据塔中分隔壁上方或下方蒸气再压缩的位置，开发了两种配置的MVRC辅助DWC（MVRC-DWC），并通过能量，火用，经济和环境影响（4E）分析进行了综合评估，并进行了比较与现有的蒸汽压缩辅助分隔壁塔（VRC-DWC）相比，VRC-DWC（IHI-VRC-DWC）的竞争性得到了极大提高。此外，精心设计了预分离柱和不同DWC配置之间的热集成，并通过4E分析进行了评估。相比之下，CRS-MVRC-DWC可以向预分离塔提供更多的潜热蒸气，因此，与其他配置相比，该方法具有最大的节能效果，最低的能值消耗和能值损失。使用CRS-MVRC-DWC的过程的TAC节省可以达到25.72％的最高值。