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Last 10 active questions:


Question No : 5966  Date Posted :5/18/2018 View detailsView details and responses  
Category : Refining Operations Submit a responseSubmit a response  
  Subject : Use of two controller in overhead of column
  This is in continuation to Q. 5965 posted earlier on the forum and one of its response.

It is not a hot vapor bypass, there is a PC to control the pressure of column after that cooling water exchanger than to reflux drum and second line from the column overhead having just PDC and then direct to reflux drum, so my question is why these two controller; in a way both will be controlling the pressure of a column so whats the use of giving PDC?

Number of responses: 1


Question No : 5965  Date Posted :5/16/2018 View detailsView details and responses  
Category : Refining Submit a responseSubmit a response  
  Subject : Use of two controller in overhead of column
  For distillation of C5 component & heavier in distillation column, we have pressure controller in overhead of column and also PDC in bypass of condenser to the receiver drum. How these two controller are controlling the parameter and why do we need two separate controller? And what will happen if we have only one controller?
Number of responses: 1


Question No : 5964  Date Posted :4/26/2018 View detailsView details and responses  
Category : Refining Operations Submit a responseSubmit a response  
  Subject : Asphalts
  In asphalt transport lines from a terminal to docks, how to leave this line empty and what means do we use for this purpose?
Number of responses: 1


Question No : 5963  Date Posted :4/20/2018 View detailsView details and responses  
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  Subject : JFTOT Tare Value ASTM D3241
  I am confused about JFTOT differential pressure tare value. How should it be, after calibration and bfore running a sample? If value is high, how should it be adjusted? It is ALCOR JFTOT-11 230 Equipment. Please advise.
Number of responses: 1


Question No : 5962  Date Posted :4/3/2018 View detailsView details and responses  
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  Subject : FCC Wet Gas Compressor
  I would be grateful if the forum could tell the typical composition of wet gas for wet gas compressor.
Number of responses: 1


Question No : 5961  Date Posted :3/21/2018 View detailsView details and responses  
Category : Refining Operations Submit a responseSubmit a response  
  Subject : High water level in FCCU Debutaniser reflux drum boot
  We are facing problem with FCCU Debutanizer reflux drum boot frequently water getting accumulating & we are draining the boot minimum 5-6 times in every shift, initially suspected for debut overhead exchangers leak but found all are ok.

Can anyone inform what will be the reason for water accumulation in debut reflux drum boot?

Number of responses: 1


Question No : 5960  Date Posted :2/2/2018 View detailsView details and responses  
Category : Refining Operations Submit a responseSubmit a response  
  Subject : Draw Off Temperatures
  How can we calculate theoratically draw off temperatures of Kerosene and diesel to be withdrawn from CDU? Similarly what would be the procedure in case of LVGO and HVGO in case of Vacuum Distillation?
Number of responses: 1


Question No : 5959  Date Posted :3/1/2018 View detailsView details and responses  
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  Subject : CCR
  What would cause the regenerated sample to stick to the ends of a glass sample bottle?
Number of responses: 1


Question No : 5958  Date Posted :3/18/2018 View detailsView details and responses  
Category : Refining Operations Submit a responseSubmit a response  
  Subject : Sour Water Treatment
  What is the main reason of continuous High Chloride content in Column Reflux Drum boot water?

How can we conttol it? Could someone please explain in detail about the reactions carried out from Column Vapour line to Reflux drum Sour water & action of chemicals?

Number of responses: 0


Question No : 5957  Date Posted :3/15/2018 View detailsView details and responses  
Category : Refining Submit a responseSubmit a response  
  Subject : DHDS Reactor delta pressure
  DHDS unit reactor delta pressure increased up to 6 kg/cm2 due to power failures and was increasing gradually. But after 2-3 months, DHDS unit tripped 2-3 times (in a period of just 4-5 days) due to power failure but now after start up, delta P has reduced up to 5 kg/cm2. Pressure transmitters are checked. Is there any possible cause for delta P reduction?
Number of responses: 2


 


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