Measuring the Difficult to Measure Symposium

Posted by Margaret Bletsch

Dec 3, 2018 8:26:44 PM

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Register to attend Tracerco's 2019 Innovative Process Diagnostics Symposium 
February 5, 2019 in Deer Park, Texas, USA - 8:00 am - 3:30 pm
February 20 in Gonzales, Louisiana, USA - 8:00 am - 3:30 pm

 

Learn from our team of experts how Tracerco's Process Diagnostic technologies can be applied to help improve plant operations in yourNew call-to-action facility. This symposium is designed to give refinery and chemical process personnel an understanding of how our products and services can be used to diagnose critical process issues. The symposium contains in-depth case studies illustrating how data obtained from our gamma scanning, nucleonic instruments and tracer technologies can be applied to help troubleshoot and resolve process plant problems. 

At the end of the symposium, Tracerco's panel of experts will host a Q&A session discussing the latest industry challenges and how to measure the difficult to measure process issues. 

Read more to learn about the session topics and download a copy of the invitation.

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Topics: Damage to vessel internals, trayed tower, PackView Analysis, mass transfer diagnostics, packed bed performance analytics, Tracer Study, exchanger bundle leak testing, chemical leak test, online leak detection, feed/effluent heat exchangers, off spec product, tomography scan, monitor wash bed coking, packed bed towers, packed bed scan, liquid distribution, quantitative analysis pack beds, packing mal-distribution, level detection devices, gamma scan, fcc services, verify flow meters, flow rate calculations, fugitive flare flow, Flow Study, flare flowrate data, flare gas meter, flare flow measurement, tray fouling, fccu studies, Process Diagnostics Technology, pipeline blockage, gamma scanning distillation columns, exchangers, solids buildup

Crude Vacuum Tower Wash Bed Optimization

Posted by Margaret Bletsch

Jun 6, 2017 5:58:02 PM

The crude unit of today’s modern refinery is where it all starts.  Good, clean fractionation from the crude atmospheric and crude vacuum towers greatly impacts the operation of downstream units.

The wash bed in the Crude vacuum tower is one of those so-called evil necessities.  When it operates well, it does not seem to garner much attention but, when things go wrong challenges can occur.  The wash bed of the Crude vacuum tower is prone to coking/fouling due to the low liquid rates along with high vapour rates and high temperatures.  Generally, the wetting rate at the top of the wash bed is minimised to prevent high-value product loss, but lower wetting rates lead directly to coke formation in the bed.  The operating condition or the rate and severity of coking in the Crude vacuum tower wash bed is also one of the key variables determining the cycle time or run length between turnarounds.  So, the typical refiner works to balance the economics of product Heavy Vacuum Gas Oil (HVGO) recovery versus unscheduled or premature downtime to replace a coked bed. 

Marathon Petroleum Company LP’s (MPC) approach for operation of the vacuum tower wash bed is based on a novel approach.  MPC regards the packing in the wash bed as a consumable item.  The goal – fully consume the useful life of the packing by the end of the operating cycle to maximise operating profit, by maximising HVGO yield.  MPC uses Tracerco’s ThruVision™ technology to routinely monitor the wash bed density to help manage the wash bed useful life during the operating cycle.  The ThruVision™ technology provides a detailed density map at a specific vertical elevation that can pinpoint specific areas of liquid maldistribution or solids/liquid build-up. 

This case study shows the learning process over short operating cycles and an example of the operating stratagem to manage the operating life of the vacuum column wash bed over a multi-year operating cycle.

 CLICK HERE To download the full article that was published in the April 2017 issue of Hydrocarbon Engineering.

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Topics: Gamma Scanning, gamma scan, quantitative analysis pack beds, liquid distribution, Tru-Grid Scan, PackView Analysis, ThruVision scan, monitor wash bed coking, tomography scan

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