Thursday, April 26, 2012

Tabbed PFD views in PRO/II

One of the key new features of PRO/II 9.0 was an upgrade of the Provision GUI. One of the key enhancements within the upgrade was the ability to have multiple views of the PFD in various tabs. ]

Tuesday, April 24, 2012

ACA.HF - Safe online measurement of HF!

Online measurement of %HF, %ASO and %Water in hydro-fluoric acid (HF) alkylation catalyst, the control of whose composition is critical to alkylation unit optimization. View the webinar to learn more about this unique offering.

Monday, April 23, 2012

Free Webinar, April 25th, Understanding Relief System Sizing

Understanding Relief System Sizing
When: April 25 at 10:00am & 2:00pm Eastern

Friday, April 20, 2012

Relief Valve Sizing using VISUAL FLOW

-          Relief valve sizing in VISUAL FLOW is handled automatically by the program (i.e. – If you have a converged VISUAL FLOW model, No additional user input is required)

-          Choice of 2 methods for performing Relief Valve sizing –
          API 2 Phase Method (API Method 520b) [Default Method]
          HEM Diers (Leung) Method
     Technical equations used for these methods are available in Appendix A of the User’s Guide for VISUAL FLOW

-          Selecting between these methods can be done in the Options à Network Solution… window

Submitted by: 
Saher S. Jasvi
Tech. Support for SimSci-Esscor

Thursday, April 19, 2012

In addition to SIM4ME Reports Excel and text-based output, PRO/II allows users to interactively view stream results in a number of ways. Stream Property Tables, Data Review Windows, Stream Displays, Tooltips and other Graphical User Interface (GUI) features allow users to view properties quickly and easily, without the need to generate a complete report.

Wednesday, April 18, 2012

Understanding Thermodynamic Options Webinar Recording

Here is the recording of the "Understanding Thermodynamic Options" Webinar. Enjoy!

Tuesday, April 17, 2012

Announcing the release of DYNSIM 5.0

We are pleased to announce the release of DYNSIM 5.0.

DYNSIM 5.0 has developments that:
       Improves DYNSIM’s competitive position with new features while lowering Invensys’ cost to deliver projects, making service more profitable
       Solidifies DYNSIM’s position with our strongest customers
       Improves development efficiency to lower Maintenance of Line (MOL) costs and make funds available for new features

These build upon the new features added in 4.5.3/4.5.4

More information can be found in the release notes.

DYNSIM 5.0 can be download from the Electronic SoftwareDistribution (ESD) website.

Monday, April 16, 2012

PRO/II customization & output webinar

Here is a recorded webinar on PRO/II Customization & Output

Free Webinar, April 18th, Expanding OTS into the Mining Industry

Expanding OTS into the Mining Industry
When: April 18 at 10:00am & 2:00pm Eastern

About the speaker: The Dynamic Simulation group at Invensys Operations Management has delivered over 300 unique projects and has grown dramatically in the last decade. The speaker for this presentation is part of the North America Dynamic Simulation group.

Monday, April 9, 2012

Free Webinar - April 11th, Reformer and Isomerization Reactor Models

Reformer and Isomerization Reactor Models
When: April 11 at 10:00am & 2:00pm Eastern

About the speaker: Rujun Li is a product manager for the SimSci-Esscor Refinery Reactor Models and with widespread knowledge in the application of simulation software in industry.
What's covered in this 60-minute webinar:
  • Introduction to the SimSci-Esscor reformer and isomerization reactor models
  • Live demonstrations of the reactor models

Friday, April 6, 2012

Optimizing Boiler Operations through Adaptive Modeling of Advanced Process Control on Power Engineering

Optimizing Boiler Operations through Adaptive Modeling of Advanced Process Control

By Thomas Kinney, Product Management, Advanced Applications, Invensys Operations Management

Modeling Solvent Extraction Systems

Modeling Solvent Extraction Systems

There are a number of chemical processes used in the refining sector which use solvents to effect a separation of closely boiling systems. They include among others, extraction of aromatics from petroleum feedstocks, separation of C4 and C5 hydrocarbons, and solvent Deasphalting. Each of these processes need comprehensive sets of fitted interaction parameters for proper thermodynamic modeling.

Recent legislation has mandated lower aromatic levels in refinery products, so we will focus on the extraction of aromatics for this blog. There are a number of widely used competing solvent extraction systems and licensors. Typically the licensor has the necessary data at hand to predict or model the performance of their solvent with a given feed stream. A proven track record along with claims or guarantees as to capital and operating cost factor into the decision of an operator in selecting among the competing processes. Commonly used solvents for aromatic extraction include; N-formylmorpholine (NFM), N-methylpyrrolidone (NMP), sulfolane (TETRAHYDROTHIOPHENE 1,1-DIOXIDE) and tetra and triethylene glycols.

The components which are aprotic (not hydrogen bonding) solvents all have similar structures:

These solvents have a high selectivity for aromatics and tend to form liquid-liquid mixtures with other hydrocarbons. A good example for the amount of thermodynamic fitting necessary to accurately model a solvent extraction system would be the Sulfolane Data Bank recently developed by Simsci. Sulfolane was selected by Simsci as the first aromatic extraction system to be modeled as there are over currently 150 extraction units licensed worldwide. The first step in any modeling project is the collection of phase equilibria and process data. For many of these solvent systems published data exist in the open literature, often however the necessary data for modeling are not found in the published literature. The essential part of any solvent extraction model is an accurate representation of the ternaries of the solvent, the aromatics and the similar carbon number non-aromatics, either a paraffin or napthene. For the Sulfolane databank an extensive literature collection was developed at Simsci-Esscor over a period of a number of years.

PROII’s Ternary Plots Tool using a link to Excel, is an excellent way for the user to determine if the important ternaries for any extraction process actually accurately model the equilibria of a system. Both the size of the two phase region and the slope of the tielines need to be well represented. In addition to the viewing the reproduction of the actual phase equilibria, using this tool one can also plot column tray compositions as well. While the methodology was actually conceived as a tool for azeotrophic extractive distillation it works equally well for envisioning solvent extraction processes.

The plot below shows a ternary plot example from our SULFOLANE Databank.

Even once a databank has been developed it will be limited in the number of components having interaction available with the solvent our current databank contains the following components:

We provide VLE and LLE parameters for every binary pair of the above components. An equivalent effort must be made for each one of the other solvents to assure a viable process model is possible. Simsci-Esscor has also been assembling a Bibliography for NFM as an extraction solvent. A final comment as a reminder is in order here, the regression of each of the systems below should been done with the ternaries in mind, even thought the parameters are for the binary pairs.

Written by:

John R. Cunningham
NA Tech Support

Tuesday, April 3, 2012

Don't forget about the free PRO/II webinar!

Converging & Controlling Complex Simulations in PRO/II
When: April 4 at 10:00am & 2:00pm Eastern

About the speaker: Mike Donahue is a technical support engineer in North America with widespread knowledge in the application of simulation software in industry.
What's covered in this 60-minute webinar:
  • Managing & simplifying complex simulations with recycles
  • Examples of common applications of flowsheet control & recycles in PRO/II
Register here

Monday, April 2, 2012

Pasting stream information into PRO/II

Composition data for process streams is often kept in Excel spreadsheets. When streams contain many components, transferring this data from Excel to PRO/II can seem arduous; however, this data can be transferred easily and accurately into PRO/II using standard Windows Copy/Paste functionality. In Excel, simply select the cells containing the composition data and type <CTR>-C; then open the PRO/II stream, click in the cell for the first component and type <CTR>-V. The composition data will be pasted into PRO/II starting at the first selected cell and continuing until the data is exhausted or the stream data is completed (Note: take care to use the same component order in both Excel and PRO/II).

This method can be used to transfer assay data, tabular data, compressor curves and other properties from Excel to PRO/II. In cases where the copied data extends beyond the default table size in PRO/II, the tables can be re-sized automatically.

For further details, please contact Technical Support.