文献类型：专利

英文题名：Modeling of heterogeneous azeotropic rectification solvent dehydrating tower of industrial terephthalic acid purifying device, comprises e.g. combining binary interaction parameter and thermodynamic model, and verifying parameter

作者：QIAN F;ZHONG W;DU W;YE Z;PENG C;HUANG X

机构：[1]UNIV EAST CHINA SCI&TECHNOLOGY

申请号：CN101986320-A

申请日：2010-08-23

公开日：2011-03-16

语种：英文

收录：DERWENT

摘要：NOVELTY - Modeling of heterogeneous azeotropic rectification solvent dehydrating tower of industrial terephthalic acid purifying device, comprises determining a thermodynamic model capable of describing the gas and liquid balance phase action, obtaining binary gas and liquid or liquid and liquid balance data and partial ternary phase balance data of the mixing system, using the binary test data for regression fit on the binary interaction parameter which is combined with the thermodynamic model, determining the input parameter, design regulation and variable of the stable model. USE - The method is useful for modeling heterogeneous azeotropic rectification solvent dehydrating tower of industrial terephthalic acid purifying device. DETAILED DESCRIPTION - Modeling of heterogeneous azeotropic rectification solvent dehydrating tower of industrial terephthalic acid purifying device, comprises (i) determining a thermodynamic model capable of accurately describing the gas and liquid balance phase action of the mixing system according to the thermodynamic property of the mixing system in the solvent dehydrating tower using propyl acetate as entrainer, where the thermodynamic method selects an activity coefficient method to correct the deviate caused by the liquid imperfection and the association effect of the ethylic acid based on universal quasi-chemical model (UNIQUAC) partially formed and selects a second virial coefficient Hayden O'Connell (HOC) model with chemical theory in a state equation method to correct the gas association effect and the imperfection action; (ii) obtaining binary gas and liquid or liquid and liquid balance data and partial ternary phase balance data of the mixing system of the solvent dehydrating tower by testing and checking authoritative literature; (iii) using the binary test data for performing regression fit on the binary interaction parameter in the UNIQUAC model by using a great likelihood method, using the obtained binary interaction parameter for predicting a phase balance action of a multi-element system, establishing thermodynamic model and parameter capable of accurately describing the physical property of the quinary system; (iv) combining the thermodynamic theoretical model obtained in the step (i) and the binary interaction parameter fit in the step (iii) according to the balanced stable model MESH equation of the rectification tower, where a dehydrating tower condenser and a decanter used as flash evaporator models, and establishing the mathematical stable model of the heterogeneous azeotropic rectification solvent dehydrating tower; (v) determining any input parameter, design regulation and variable of the stable model by using the designed working condition data of the heterogeneous azeotropic solvent dehydrating tower of the industrial terephthalic acid purifying device, where the input parameter includes temperature of any inlet material flow, pressure, flow, composition, template number, operation pressure, tower pressure reduction, material inlet and outlet positions, split phase key component, tower plate efficiency, and middle extract flow, setting the design regulation similar component or flow, meeting the designed regulation requirement by regulating the related variable; and (vi) correcting any input parameter, designed regulation and variable of the designed working condition stable model of the solvent dehydrating tower accurately checked in the step (v) according to the actual industrial data of the device and any component analysis data, correcting and adjusting the model, obtaining the technical mechanism stable model capable of accurately describing the actual working condition of the heterogeneous azeotropic solvent dehydrating tower of the industrial terephthalic acid purifying device, where the data can include temperatures, pressures, flows and components of extract water from an oxidation reactor, washing water of a high-pressure absorbing tower, a tower top gas phase from a PX recycling tower, a gas phase from a gas purification tower, a flash evaporation gas phase from a second crystallizer, a condensate from a gas and liquid separation tank of a first condensate, top reflux, middle reflux, outlet materials of tower top and tower kettle, and middle extract material, and the average value under the stable working condition in the collected data is valued to the data analysis and pre-processing.