محاكاة لمعمل الاثلين في العراق باستخدام الاسبن بلسن والماتلاب == Simulation of Iraqi Ethylene Plant Using Aspen Plus And Matlab
Author name:
هدى عامر عبد القادر
Supervisor name:
صفاء الدين عبد الله النعيمي | زيدون محسن شكور
General topic:
Chemical Engineering
Specific topic:
Chemical Processes
Degree:
Master
University:
University of Technology - Department Of Chemical Engineering - Chemical Process Engineering Branch
Language:
English
University location:
Baghdad
First pages:
38T284 - p.pdf
Abstract:
يعد معمل الاثيلين واحد من اهم معامل البتروكيماويات والاكبر حجما في العالم في الوقت الحاضر. بالاضافة الى ذلك، فانه يعتبر جوهر اي مجمع للبتروكيماويات. وفي مثل هذه المعامل، يخضع الغاز الطبيعي الى العديد من العمليات لفصل مكوناته.الهدف من هذه الدر | Ethylene plant is one of the most important and largest volume petrochemicals in the world today. In addition, it is a core of any petrochemical complex. In such plant, the natural gas is subjected to many processes to separate the components. The objective of this study is to develop a detailed model to simulate an ethylene plant, which includes a pyrolysis section, a separation system and an integrated refrigeration system. An optimization has been performed for a part of the plant; this part is the furnace.The ethylene plant at the Petrochemical Complex in PC1 - Basrah has been considered as a case of study. The kinetics of ethane thermal cracking in pyrolysis furnace has been simulated using Aspen Plus and MATLAB. The radiant coils in furnace have been modeled as a one dimensional plug - flow reactor in which ethane is subjected to steam cracking. The overall plant has been simulated using Aspen Plus version (7.3), and the reactor has been simulated using MATLAB environment, version (2013a) in addition to Aspen Plus. The validity simulation model test has been achieved by comparing the simulation results with the actual data collected from PC1and it showed a great similarity and reliability for both simulation models.A steady state simulation model has been developed to study the behavior of multi - types feed supplied to the plant. Furthermore, the model has been used to evaluate the effects of various process parameters, including temperature of reaction (Reactor outlet temperature), dilution steam to ethane ratio (DS/HC) and the outlet flow rate of hydrocarbons.The other aim of this study is to obtain the optimum operating conditions using Aspen Plus for the reactor in the furnace which has an effect on the final product to determine the maximum profit. Optimization using Genetic Algorithm (GA) by MATLAB has been used as well as Aspen Plus, and a comparison has been made between both methods. The selection of the optimum operating conditions of reactor was obtained to achieve the following objectives together : • Increasing the production rate of ethylene.• Increasing the outlet flow rate of hydrocarbons.These objectives have managed to be achieved all together by maximizing the total profit obtained from the furnace. Finally, Aspen Plus results show that the objectives have been satisfied by manipulating the decision variables Temperature of reaction (Reactor outlet temperature) in the range of (850 - 920) ?C, dilution steam to ethane ratio DS/HC in the range of (0.2 - 0.5) and the outlet flow rate of hydrocarbons ) in the range of (2421 - 1064) Kmole/hr to increase the profit of the furnace to approximately (10.541%) and (5.55%) for the whole plant.
