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Recent content by dagur777

  1. dagur777

    Over-flash in Atmospheric Fractionator....function??

    Petro0707, Could you give an example and formula based on your description for overflash calculation? Thanks Regards
  2. dagur777

    Smith Prediction

    try this site http://controlsweekly.com/controllers.htm#SmithPredictor Regards, Dagur
  3. dagur777

    Over-flash in Atmospheric Fractionator....function??

    Milutin/25362, From the control standpoint, how to control the overflash if we are running different kind of crude (crude switch). The heater COT cannot be always fixed. Control the AGO draw and endpoint might not be the only solution. Can we calculate overflash? from H&M balance? or there is a...
  4. dagur777

    Quench column bottom level cascade to top reflux

    The bottom is on flow control with very small amount. That's why level controller cannot cascade to it.
  5. dagur777

    Quench column bottom level cascade to top reflux

    Does anyone has experience in bottoms level cascade to top reflux in distillation column control? The current plant setup is the top reflux drum level cascade to distillate product flow. Column bottom level cascade to top reflux. I haven't seen this kind of setup. I think it can cause the column...
  6. dagur777

    Largest FCC Unit

    Paraguaná Refining Center (CRP) is located in the west area of Venezuela. It includes two refineries, Cardon refinery and AMUAY refinery. AMUAY has the largest capacity Cude Units (five Crude units) in the world. AMUAY's Flexicoker is also the biggest in the world (only five flexicokers...
  7. dagur777

    Finding empty cells

    Go to "Data", "Filter", "AutoFilter", select "(Custom...)", show row where: equal (= blank, do not type anything), it will filter out all empty cell. Then copy the whole worksheet to another worksheet, you can get what you want.
  8. dagur777

    Incinerator Stack Design Issues

    Does any of you have knowledge and experience for analyzers on EDC and VCM purification sections? Please check my question in the Forums in measurement and control instrumentation engineering. I wnat to know if you know any analyzer available for Heads Column top (to measure CCl4, EDC) and VCM...
  9. dagur777

    analyzers on EDC and VCM purification sections

    I just checked from website, I could not find the by-products which those companies can analysis. Siemens has analyzer to analysis vent gas on the Oxychlorination section. ABB and AppliTek they do water analysis for VCM plant. If anyone find something, please let me know.
  10. dagur777

    analyzers on EDC and VCM purification sections

    We would like to add analyzer on top of Heads Column at EDC Purification section and analyzer on top of VCM Column at VCM Purification section to analyzer EDC and by-products such as CCl4, 1,1,2-TCE, EtCl, MtCl, etc. Any suggestion for a reliabe analyzer company (and model number) which has...
  11. dagur777

    cell starts with big numbers

    I open a excel file which cell starts with big row numbers (1013, 1014, etc.). I checked it and did make sure there is no hide cells (using unhide) or any protection on the worksheet. Could anyone tell me how to change to the normal sheet starts from A1, A2,....? A B C D...
  12. dagur777

    free excel add-in for statistical tools

    Anyone know any good statistical tools for excel add-in? Or any good website related?
  13. dagur777

    PE/PP licensors

    Does anyone have customers' information for PE/PP licensor? For example, Sinopec Yanshan PP - Mitsui CSTR reactors ???? t/yr, Shanghai Petrochemical PP uses Basell Loop Reactors, XXX t/yr etc. Any website provide this kind of information?
  14. dagur777

    How to add rows and increment averaged amount between them

    How do you write a program or VB to increase the rows? Also, any easy way to increment the average amount between them? I have attached the sample excel file. The actually data has about 1000 rows. Original Data Set (5 minutes Snap Shot) COEFF A COEFF B TIMESTAMP...
  15. dagur777

    Partially filled head volume

    Check the reference "Calculating Tank Volume" by Tim Broyles - Chemical Processing 2000 Fluid Flow Annual p.32 http://www.chemicalprocessing.com

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