6 replies to this topic

[swethaneelagiri]

I need iformation regarding desalting of crude oil. What type of equipment is used for desalting? I know few things about chemical and electrostatic desalting. We need to use demulsifer in chemical desalting. What kind of demulsifers are used? Can I simulate the desalting process using HYSYS? I would really appreciate if anyone could help me with this information.

[Sevail]

for Simulation of Desalter equipment, you couldn't use HYSYS software. only use prepare a specification include feed charactristic & your desired product specification. aalso DEmulsifier type can be advise by Desalter Vendor. also required Dilution water will be specified by Vendor (generally you need dilution water equal 5% of Crude oil).

[Zauberberg]

Petreco (Cameron) and Natco are desalter manufacturers with, I believe, more than 90% of this type of equipment installed in refineries worldwide:

http://www.natcogrou...mp;ProductID=50
http://www.c-a-m.com...il.cfm?pid=2629
http://www.c-a-m.com...il.cfm?pid=2630
http://www.c-a-m.com...il.cfm?pid=2671

For demuslifier selection, proper laboratory testing of various chemicals is required in order to select the best one for a given type of crude oil. There's no universal demulsifier (for paraffinic, naphthenic or aromatic crude), and full optimization of process parameters affecting desalter operation - washwater rate, desalter temperature, pressure drop across the mixing valve or static mixer - is mandatory. Nalco, Chimec, and GE Betz are the most famous chemical vendors.

[heltzooor]

Doesn't ProSep also perform this function?
Are there any other companies offering desalting technology remotely besides the three bigs?
Where'd you get the 90% number?

Cheers.

Greg

Petreco (Cameron) and Natco are desalter manufacturers with, I believe, more than 90% of this type of equipment installed in refineries worldwide:

http://www.natcogrou...mp;ProductID=50
http://www.c-a-m.com...il.cfm?pid=2629
http://www.c-a-m.com...il.cfm?pid=2630
http://www.c-a-m.com...il.cfm?pid=2671

For demuslifier selection, proper laboratory testing of various chemicals is required in order to select the best one for a given type of crude oil. There's no universal demulsifier (for paraffinic, naphthenic or aromatic crude), and full optimization of process parameters affecting desalter operation - washwater rate, desalter temperature, pressure drop across the mixing valve or static mixer - is mandatory. Nalco, Chimec, and GE Betz are the most famous chemical vendors.

[djack77494]

Are there any other companies offering desalting technology remotely besides the three bigs?
Where'd you get the 90% number?

Greg,
I don't know where Zauberberg got the 90% number, but of the 3 or 4 Desalters I've seen all were either Petreco or Nalco. Merichem may be another supplier, I'm just not sure. In any case, there will not be that many suppliers for this pretty specialized field.

[Zauberberg]

As Doug says, wherever you go you'll either see or Petreco/Cameron or Natco desalters so the number is probably even higher than 90%. I don't know of anyone else who does desalting business on a worldwide scale, but I could be wrong since I left refining more than two years ago and dealing with consultancy/gas processing from then.

As far as desalting upstream is concerned, I've never seen it. Dewatering - yes, in the sense you need to remove water from crude oil as much as practicable before it is exported to pipeline/tankers. It's an economic parameter. Whenever you buy crude oil, you always look for BS&W because this is a clear loss from the beginning, and the reduction of refinery margin.

Prosep is the manufacturer of filtering equipment? You can't do desalting with this kind of devices.
Best regards,

[muralimuthu]

In HYSYS, we couldnt make deaslting operation. in generall three phase seperator shall be used in HYSYS. anyhow at that pressure, vapor generation will not be there, i will behave like liquid liquid seperation. but you cannnot simulate the salt balance and all.
Bye
M.Murali
murali.m@petrofac.com
960009277