Abstract
The results of computer simulation of industrial processes of separation of substances with the inclusion of a heat pump are presented. Designs of heat pumps of closed type, open type, like “pipe in pipe” are considered. In the simulation software Aspen HYSYS, the adequacy of the computer model of the “rectification unit – closed type heat pump” system was checked. The results of computer simulation of the “rectification unit – open-type heat pump ’pipe in pipe’” system are presented. This system allows to increase the efficiency of the unit by 9% compared with the system of separation of substances with the inclusion of an open-type heat pump and by 14% compared with a system with the inclusion of a closed-type heat pump.
Highlights
A variety of organic polymers have been used as The processes of separation of substances, implemented in technological schemes of chemical, petrochemical, oil refining, pulp and paper, food and other industries, are characterized by significant energy consumption
A system is proposed for utilization of the energy flow of the products of the distillation columns using heat pumps (HP) [4, 5]
Modeling and comparative analysis of the energy efficiency of the processes of separation of substances with the inclusion of a heat pump of a closed type, open type and "pipe in pipe" type was conducted in software Aspen HYSYS using the example of the substances separation system of "propane-butane"
Summary
A variety of organic polymers have been used as The processes of separation of substances, implemented in technological schemes of chemical, petrochemical, oil refining, pulp and paper, food and other industries, are characterized by significant energy consumption. Common technologies, involving separation processes are areas of separation of blend "ethylene-ethane", "propylene-propane" in the production of organic synthesis; areas of separation of the blend "propanebutane" at gas fractionation plants at the enterprises of primary oil refining; areas of separation of the blend "water-alcohol" in the pulp and paper and food industries and so on. In these areas, substances are separated by an absorption-rectification or condensation-rectification method. The use of HP in the process of separation of substances allows, in addition to reducing consumption of thermal energy, to reduce the number of plates by changing the pressure in the columns and reduce the metal structure [6, 7]
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