Process flowsheeting
Encyclopedia
Process flowsheeting is the use of computer aids to perform steady-state heat and mass balancing, sizing and costing calculations for a chemical process.
The process design effort may be split into three basic steps
Synthesis is the step where the structure of the flowsheet is chosen. It is also in this step that one initializes values for variables which one is free to set.
Analysis is usually made up of three steps
Optimization involves both structural optimization of the flow sheet itself as well as optimization of parameters in a given flowsheet. In the former one may alter the equipment used and/or its interconnection with other equipment. In the later one simply changes the values of parameters such as temperature, pressure within a given flowsheet. Parameter Optimization is a more advanced stage of theory than process flowsheet optimization.
The Plant Design Project.
The first step in the sequence leading to the construction of a process plant and its use in the manufacture of a product is the conception of a process. The concept of a process is embodied in the form of a "flow sheet". Process design then proceeds on the basis of the flow sheet chosen. Physical property data are the other component needed for process design apart from a flow sheet. The result of process design is a process flow diagram
, PFD. Detailed engineering for the project and vessel specifications then begin. Process flowsheeting ends at the point of generation of a suitable PFD.
0-190566805-7
General purpose flowsheeting programs became usable and reliable around 1965-1970.
The process design effort may be split into three basic steps
- synthesis
- analysis and
- optimization.
Synthesis is the step where the structure of the flowsheet is chosen. It is also in this step that one initializes values for variables which one is free to set.
Analysis is usually made up of three steps
- solving heat and material balances
- sizing and costing the equipment and
- evaluating the economic worth, safety, operability etc. of the chosen flow sheet
Optimization involves both structural optimization of the flow sheet itself as well as optimization of parameters in a given flowsheet. In the former one may alter the equipment used and/or its interconnection with other equipment. In the later one simply changes the values of parameters such as temperature, pressure within a given flowsheet. Parameter Optimization is a more advanced stage of theory than process flowsheet optimization.
The Plant Design Project.
The first step in the sequence leading to the construction of a process plant and its use in the manufacture of a product is the conception of a process. The concept of a process is embodied in the form of a "flow sheet". Process design then proceeds on the basis of the flow sheet chosen. Physical property data are the other component needed for process design apart from a flow sheet. The result of process design is a process flow diagram
Process Flow diagram
A process flow diagram is a diagram commonly used in engineering to indicate the general flow of plant processes and equipment.The PFD displays the relationship between major equipment of a plant facility and does not show minor details such as piping details and designations...
, PFD. Detailed engineering for the project and vessel specifications then begin. Process flowsheeting ends at the point of generation of a suitable PFD.
0-190566805-7
General purpose flowsheeting programs became usable and reliable around 1965-1970.