Introducing vapor recompression mechanism in heat‐integrated distillation column: Impact of internal energy driven intermediate and bottom reboiler

Abstract

A novel combination of internally heat-integrated distillation column (HIDiC) and vapor recompression column (VRC) with intermediate reboiler (IR) is proposed. Supplying heat at the highest temperature point (i.e., column bottom) of the VRC scheme is not thermodynamically favorable and, therefore, we aim to install the IR for better distribution of heat along the column length, thereby reducing the compressor work. Introducing IR in the combined HIDiC-VRC system formulates an open-loop variable manipulation policy to evaluate the comparative impact of internal and external heat sources on bottom liquid reboiling. With internal energy driven bottom reboiler, we further investigate the hybrid HIDiC-VRCIR column with proposing the two modes of compressor arrangement, namely parallel and series. Finally, a multicomponent distillation system is exampled to show the promising potential of the proposed HIDiC-VRCIR configurations in improving the energetic and economic performance over the HIDiC-alone and HIDiC-VRC schemes with reference to a conventional standalone column.

Reducing CO2 emissions and process cost in vinyl acetate/acetic acid/acetic anhydride ternary mixture via heat pumps with heat exchange network

“…The process of chemical industry is known as an energy‐intensive consumer, emitting excessive carbon dioxide and harmful gas, and thus has most deleterious effects on the environment and human health 1 . The energy consumption (EC) of the separation process accounts for 40–60% 2–4 in total EC of chemical industry. Obviously, exploring a “green” separation process is important for the sake of reducing EC and excessive CO 2 emission.…”

Experimental Investigation, Process Design, and Optimization Analysis on the Production of Solketal in the Reactive Dividing Wall Column

“…Energy-saving issues in the distillation process have received widespread attention due to increased awareness of energy-saving and emission reduction. The vapor recompression column (VRC) , and internal heat integrated distillation column (HIDiC) − are typical examples for energy saving in distillation, which are realized by the assistance of the compressor. The dividing wall column (DWC) is another process intensification technology that integrates the distillation column sequence into a column shell and realizes the separation of multiple components .…”

Optimization of Number of Stages for Energy Conservation and Economic Feasibility of the Heat-Integrated Air Separation Column

“…The air separation realized by cryogenic distillation is a commonly used but energy-intensive unit operation in the chemical industry. Therefore, energy-saving optimization has become the hot spot in the field of cryogenic air separation. − Recently, heat integration techniques have become the frontier of distillation technology to enhance its energy efficiency. − Several novel techniques have been proposed for the cryogenic air separation process, such as the heat-integrated distillation column (HIDiC), − the vapor recompression column, , self-heat recuperation, , binary heat recovery cycles, and liquefied natural gas cold energy utilization. , …”