Dividing Wall Column Revamp Optimises Mixed Xylenes Production
نویسنده
چکیده
The successful revamp of a conventional tray Xylenes Distillation Column (3800 mm / 4300 mm diameter) is described. The column takes a xylene side-stream from reformate to feed an aromatics plant to make higher value products. Changing the column configuration to a Dividing Wall Column (DWC) resulted in improved product purity and significant energy savings. The project cycle is detailed including process design, hydraulic design, mechanical design, manufacture, testing and site work. Economic benefits are outlined and the lessons learned are discussed.
منابع مشابه
Optimal Operation of a Three-Product Dividing-Wall Column with Self-Optimizing Control Structure Design
This paper deals with optimal operation of a three-product Dividing-Wall Column (DWC). The main idea is to design a control structure, through a systematic procedure for plantwide control, with an objective to achieve desired product purities with the minimum use of energy. Exact local method is used to find the best controlled variables as single measurement or combination of measurements ...
متن کاملPrediction of the Operating Conditions in a Batch Distillation Column Using a Shortcut Method
A shortcut procedure as quick, easy-to use method for design and simulation of multicomponent batch distillation is used to predict the operating condition of recovering xylene from solvent in an existing batch distillation column in benzol refinery. The procedure can be used to investigate the effect of the operating parameters on the operation of column for three possible modes of batch d...
متن کاملEstimation of xylenes adsorption selectivities: Impact on the p-xylene Simulated Moving Bed separation process
The majority of xylenes dedicated to petrochemicals use are used to produce PX which is, among the different isomers of the mixed xylenes, the most produced one to be consumed in the polyester chain, mainly in the production of fiber. In the scope of the p-xylene separation by Simulated Moving Bed Technology (SMB) it is important to improve the existing tools to study the different aspects that...
متن کاملEnergy Reduction in a Divided Wall Distillation Column
The paper presents the analysis of the thermal efficiency of a dividing wall distillation column and the influence of the feed composition on the reduction of energy consumption compared to a classical scheme of multicomponent mixture separation. The study relays on rigorous simulations in HYSYSTM using thermodynamically equivalent schemes. A case study is presented for the separation of a hydr...
متن کاملOptimal Operation of a DWC by Self-Optimizing Control: Active Vapor Split Approach
Dividing Wall Column(DWC) offers the large potential for operating and capital cost saving in compared with conventional distillation sequence. In the studied DWC in this study, the aid of Vmin diagrams, it is shown that without a suitable value for vapor split fraction bellow the dividing wall in different operating conditions, the energy requirement increases from optimal value and it wil...
متن کامل