Study On Process Simulation And The Visual Design System Of Column Internals For Rectisol Unit

The most important step of coal chemical industry, rectisol is a physical acid gas removal process using methanol at subzero temperatures to obtain pure gas. Acid gas then releases from methanol solution by desorption or stripping and is sent out for sulfur recovery. With the aid of process software Aspen Plus, a recsitol unit is transferred and set up in the software and calculation is performed. And further study is carried out on 3D drawing design in chemical engineering.Strong polarity of some components involved and the operation status beyond critical points of part of the substance make the system far from ideal state. There are association and polarity component of methanol and quantum gas of hydrogen in the system. In this paper, reported thermodynamics equations which can be used in recsol system are screened. And some parameters in related thermodynamics equations are regressed using vapor-liquid equilibrium data. State SR-POLAR and RK-ASPEN which is modified are used to Acidic Gas Absorption Column. State RK-ASPEN is used to CO2 Regeneration Column. State RK-ASPEN and PSRK are used to H2S Concentrating Column. State PSRK is used to Methanol Regeneration Column. State PRWS is used to Methanol/Water Separation Column. Because the condition of models in flash, heater and flow split are similar to interrelated column, they are selected by close principle.Based on simulation calculation of rectisol unit, the visual design system of column and column internals is studied. 3D stereogram of column and column internals are drawn by three-dimentional drawing software using the results of ASPEN PLUS. This is a basis of improving the design quality, shortening the design duration and reducing the cost.Due to research results in this paper, rectisol process for certain feed stock condition can be used as technical data packet. And this is a basis for future design of automatic 3D graphics.