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Recent Questions
Date  Replies
11/10/2018 Q: How the Load on Furnace in Crude distillation unit on CIT of Furnace?
In our Furnace the design conditions of CIT/COT are 260/360 C and actual conditions are 250/350.
Is Furnace fired duty depends on Delta T only or is it depends on CIT of Crude?
(3)
07/10/2018 Q: What is minimum H2S level maintain in UOP naphtha hydrotreating reactor recycle gas? why naphtha hydrotreating reactor can not purge at what temp? (2)
03/10/2018 Q: Is there any limitation for taking Hydrogen rich off gases as feed to reformer? My doubt is whether excess hydrogen in the feed to reformer can it cause reversible reactions as steam methane reforming is reversible in reaction? (2)
27/09/2018 Q: Is there any limitation for taking Hydrogen rich off gases as a feed to Reformer , If yes what is the limitation ? Is it because of Le Chatlier's principle if Hydrogen is more will it cause backward reaction? Or else is there any other limitation ?  
25/09/2018 Q: Our naphtha sample from crude distillation unit went off on chloride content with result showing 1.3 ppm.So we checked organic chloride in our crude tank. The result showed presence of organic chloride in that particular crude tank. So that tank is kept blocked and we resumed to our normal operation.
We did many brain-stroming and looked for solution.
Can the experts in this forum please suggest how to process this crude having high organic chloride. Is there any chemical treatment available. How can this problem be solved?
(6)
Recently Answered Questions
Date  Replies
07/10/2018 Q: What is minimum H2S level maintain in UOP naphtha hydrotreating reactor recycle gas? why naphtha hydrotreating reactor can not purge at what temp? (2)
11/10/2018 Q: How the Load on Furnace in Crude distillation unit on CIT of Furnace?
In our Furnace the design conditions of CIT/COT are 260/360 C and actual conditions are 250/350.
Is Furnace fired duty depends on Delta T only or is it depends on CIT of Crude?
(3)
16/11/2009 Q: Is there any safety procedure for damper operation in the furnace? Specially in case of failure of damper wire. Is it necessary to keep provision 100% opening in case of damper wire failure? (1)
20/06/2018 Q: At a Visbreakeing unit(coil type visbreaker) I worked on, the gas oil was drawn from the main fractionator to a gas oil stripper and then transferred via a pump to visbroken bottoms stream. We faced frequent high ampere problem at this pump. The pump returned to its normal amperes after its impeller was cleaned. Coke deposition was found on the impeller, suction strainer and discharge NRV. We had cut stripping steam to the gas oil stripper previously to decrease the overhead naphtha, however it was taken back in service to get the system back to 'design' conditions and doing so, reduced the frequency of high amperage problem. (The pump delivers 2~3 m3/hr gas oil flow. At higher flows it reaches/exceeds FLC(full load current). The pump's design minimum flow is 12 m3/hr.)
Can anyone please suggest possible remedies to this problem, specially the coke deposition at pump's impeller? Is it fairly common to have coke deposits in visbreaker gas oil lines if so what are some practices to reduce/remove the coke?
(2)
31/05/2018 Q: In distillation columns, why are trays more widely used than packings for vapour-liquid contact? What are the advantages of using trays over packings? (5)
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