Technical background

Ethanol is widely used in energy, chemical industry, pharmaceutical industry and other industries. Because there is a minimum constant boiling point of ethanol-water system, the content of ethanol obtained by ordinary distillation method will not be greater than 95.57%, and other methods must be used to further separate anhydrous ethanol. Traditional azeotropic distillation and extractive distillation have formed large-scale and highly mechanized production processes of anhydrous alcohol, but the energy consumption is relatively high, and entrainment or extractant will cause environmental pollution when the production operation is improper.

Technical comparison

Characteristics of membrane technology

★ Compared with traditional distillation and adsorption technologies, energy saving can be more than 30~50%;

★ high recovery rate is not less than 97%, and the recovery and utilization of permeate can reach more than 99%;

★ environmentally friendly does not require the introduction of a third component, and the permeate can be recycled and recycled;

★ simple operation through PLC production process control, using HMI real-time monitoring, high degree of automation;

★  Small space, easy installation and maintenance, low equipment height, modular design, simple installation and maintenance, no civil engineering requirements;

★ Compared with organic membrane, the membrane has high flux, high separation coefficient, resistance to organic solvent, no swelling, and long life.