A time for grass roots thinking ?
Within the past year or two spiking crude prices and surging refinery margins have led to overheated talk about increasing refinery capacity worldwide. Plans for construction of as many 60 grass roots refineries have been discussed. But stretched out lead times for major equipment and inflated prices, as well as declining margins and a final realization that there is not enough crude to meet demand, have brought sober thinking to the table. Recent societal changes in India and China do indeed indicate a need for new refineries but volatile politics in Latin America, looming demographic crises in Europe and explosive conditions in the Mid-East have rendered long range grass roots plans for these regions unrealistic.
Might it not be more prudent to revamp existing capacity? Many refineries have been over-designed from the start to compensate for poor process and equipment design, one way to compensate for a low level of equipment knowhow and a questionable reliance on vendors to design equipment. With the right revamp design, however, such excess capacity and equipment can be utilized to raise throughput, improve product quality and reduce energy consumption while minimizing new CAPEX. At the same time process changes can be made to adjust for the nasty crudes more and more entering the world market.
Revamps will succeed, however, only if a painstaking study is first made of existing plant to identify both limitations on present operation and opportunities for improvement. But such a study is not made sitting in the control room collecting operating history. It has to be done by revamp engineers getting their hands dirty helping operators gather field measurements. Only when these data are obtained can reliable computer models be put together and FEED package work begun. And note too that experienced revamp engineers have been able to fast-track jobs in months rather than years, producing revenue rapidly.
Prudent entrepreneurs will minimize funds at risk while meeting project objectives. At no time has such prudence been more needed than now. At no time has it been more important to think twice.
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Oil sands crude — profits and problems?
Canadian bitumen production currently runs about 1 MMbpd, with some being sold as Synbit and Dilbit. Over the next 10-12 years output is expected to increase to 3.5 MMbpd and more refiners will begin investing to process it and come to depend on the Synbit and Dilbit for a significant part of their supply. ...
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Heavy crudes are here to stay. As longs as oil prices remain high, Canadian, Venezuelan, Deep Water Gulf of Mexico, Mexican and other low API gravity crude oils will play an ever more important role in supplying world refineries. And prices promise to remain high because gainsayers notwithstanding, Hubbert ...
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Designing deepcut vacuum units that really work
Every barrel of vacuum gas oil (VGO) you can save from being reduced to coke in the delayed coker unit is a barrel more that can go to the FCCU. That’s a good reason to raise HVGO cutpoint. But how to do it? Some people think the job can be done just by running computer models in the engineering ...
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A time for grass roots thinking ?
Within the past year or two spiking crude prices and surging refinery margins have led to overheated talk about increasing refinery capacity worldwide. Plans for construction of as many 60 grass roots refineries have been discussed. But stretched out lead times for major equipment and inflated prices, ...
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A single integrated vacuum system
Failure to design the vacuum unit as an integrated system will invariably result in unsatisfactory yield and poor product quality (high vanadium, nickel, microcarbon, or asphaltenes), and ultimately, an unscheduled shutdown. To avoid these revamp problems the charge pump, fired heater, transfer line, ...
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Back in the late 1970’s and early 1980’s when fuel gas prices were high, energy utilization assumed major importance. A new method of calculating heat exchanger networks was developed. It was called Pinch Technology. Today pinch has been rediscovered by engineers who have access to fast computer ...
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A group of interesting articles* deals with opportunity crudes, a mixed breed that includes very heavy, sour and high total acid number types as well as those with unexceptional naphthenic acid content but which do have significant concentrations of aliphatic acids or possess the ability to generate ...
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Processing heavy Canadian crude
Reducing crude oil cost is the major incentive driving crude and vacuum unit projects to handle heavy Canadian crudes. But such crudes–Albian Heavy, Christina Lake, MacKay River and others derived from oil sands–today present refiners with a unique set of problems not just because of extra-low ...
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Why do many crude/vacuum units perform poorly?
In many cases it’s because the original design was based more on virtual than actual reality. There is no question: computer simulations have a key role to play but it’s equally true that process design needs to be based on what works in the field and not on the ideals of the process simulator. ...
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Why produce diesel from the vacuum unit?
Look ahead five years. The economy is likely to keep tightening and the rush to control pollution will inevitably be accompanied by demands for greater energy conservation. Consequence? A growing market for diesel which yields more energy per unit volume. Yet many continue to believe that producing diesel ...