Help on the dehydration topics

[tit1981]

We are now having problems with dehydration process in gas separation plant and we are trying to solve this problem by finding some experts or consultants dealing with this dehydration problem before. However, the problem is that we have no idea about experts or consultants having such experience. Please kindly advise us on finding experts or consultants in order to solve this problem.

 

[zdas04]

While plant consulting is worldwide to some extent, it is often less expensive to find a local expert. What area of the world were you looking to solve a dehydration problem?

David

 

[gr2vessels]

tit,
Check out the link below.

http://www.alibaba.com/catalog/10996493/Dehydration_Plant.html

cheers,
gr2vessels

 

[tit1981]

Firstly, Thank you for response. The plant is located in Thailand (Gas Separation Plant). We are comfortable with both local and abroad specialists or consultants that can lead the root cause analysis on dehydration problem (Molecular Sieve type)

 

[dcasto]

here's a list of most common problems:

Leaking valves
Hydrocarbon refluxing when the gas is over 1300 BTU/cf
Incompete regeneration
low space velocity during regeneration
beds "coked" up
missed sized or partial bed loss
beds hit with freewater causing loss of bed.

 

[maddocks]

Not sure if eng-tips is keen on this, but you can send me a note offline and we can discuss to see if we have the expertise necessary to help. Our website is:

http://www.gasliquids.com

There are plenty of qualified engineering groups that can help you or provide some guidance with your process issues.

A google search would be my first strategy....

 

[tit1981]

Yes we have problem with beds hit by free water causing bed loss. that's why we are looking for the experts or consultants to systematically find the root cause before solving this problem

 

[maddocks]

Several things you can check right away...

1.) Do you have an inlet separator followed by a filter separator? Check for missing filters, liquid carryover, possible condensing on the way to the beds, lots of possibilities here...

2.) Possible cause can be carryover from the regen gas sep - often underdesigned with poor or no gas filtration.

3.) Can you explain bed loss? Do you see caking or donuts? Is the material disintegrating? Liquid water hitting the bed? Are the towers refractory lined or externally insulated?

4.) How is the regen cycle performing? Temperatures on track?

There's a lot of potential causes depedning on the problem definition....

 

[tit1981]

Thank you for your kind response. Refer to your previous response
The charcteristic of bed loss is cake affecting high pressure drop during operation
Previously, the liquid carrying over to bed comes from missing filters after inspection ;however, after changing inlet filter and type which is able to withstand amine solution, the problem is partially solved. After that there were some tracks on regen cycle and bed temperature profile and found that the regen curve is look like not being satisfied operation performance. Then it's look like this problem stems from somthing else probably design of inlet separator or other related units. thus, this is needed to conduct RCA performing systematically by specialists in oder to exactly identify what is the root cause of this problem (probably design or other units) and provide reccommendation to solve this problem.