Chemical Cleaning for Compressor suction

[procengIV]

in ac ryogenic plant, sles gas goes out of the top of demethanizer column goes through some Brazed aluminuim heat exchangers and one tube/shell heat exchanger before recompress by the brake compressor attched to turbo expander then send to sales gas compressor.

the size of the pipe is huge about48"

my question how to chemical cleaning for suction compressor both brake and sales gas

thank you

 

[Montemayor]

procengIV:

If you truly have a cryogenic process producing a gasified sales gas that is subsequently compressed by two compressors in series (that is what I think you write), then there is no engineering or process reason to treat your sales gas with any chemical. You may argue that the gas forms gums or self-reacts (polimerizes) within the compressor(s), but you haven't said that nor have you identified the "sales" gas by composition and temperature/pressure. I have never heard of a cryogenic plant that produces a gas that needs post chemical treatment before a compressor. That doesn't necessarily mean that one doesn't exist; but I want to know about it if it does exist. Post treatment downstream of a cryo plant is normally done for separation or upgrading of the product gas; the reason that I doubt need for a treatment downstream of a cryogenic plant is that if any treatment was really needed, if would logically be before the cryo plant - not after. Cryogenic plants are expensive, inaccessible, tightly designed, and sensitive to contaminants - PPMs of CO2 or water vapor will plug up a unit in no time at all.

Please give us all the detailed basic data; I can't speculate on what you have or operate. Perhaps with the data we can understand what you are proposing better.

Art Montemayor
Spring, TX

 

[TD2K]

Proceng, are you talking about chemically cleaning the piping during commissioning?

 

[procengIV]

sorry for incomplete information or misleading the readers, it is my fault.

Yes TD2K, i asked about cleaning the piping during commissioning stage.

 

[pmover]

i concur with art's comments; however, since you are referring to plant commissioning, occasionally there is the need to clean piping systems before bringing gas into the plant. particularly since there are plate-frame exchangers involved and they need clean gas passages.

there are companies that specialize in cleaning piping systems. i believe that for your situation, a mild citric acid solution will suffice in removing any loose scale, rust, and debris from the pipe. typically, they isolate essential equipment and then circulate the solution through the pipe via a pump and filter system on a flatbed truck (or similar platform).

depending upon location, disposal of cleaning solution needs to be addressed.

try searching google using the term "pickling" or "cleaning piping systems+citric acid".

good luck!
-pmover