14 replies to this topic

[Ceng]

Dear all
I'm trying to select an EPC contractor to design and build a SRU (Clause) Unit; some data of our plant are as follows:
-Feed flowrate : 0.1 MMSCMD
-CO2 mole percent : 54%
-H2S mole percent : 35%
-H2O mole percent : 11%
I have some question :
1- Regarding above mentioned stream, are there any problems sending this feed directly to a clause unit?
2-We need a sulphur purity of at least 99.8% with below flue gas spec:
• H2S: 10 ppm
• NOx: 250 ppm
• SO2: < 3000 mg/m3
Regardless of economical point of view and with assumption of meeting our specification; I want to know what's the other parameters for selecting a licensor. for example I have a list of some well-known companies to select:Lurgi, Uhde, Prosernat, CAC, etc.
Has anybody done any project with this licensors?

Edited by Ceng, 14 October 2012 - 01:59 AM.

[SUPRIYAPRA]

Go for the SHELL technology. It is proven and best.
You need to feed your Gas to Claus Unit and then You need to treat the gas in SCOT unit.

[sheiko]

Comprimo Sulfur Solutions for sure.

[kkala]

KTI-Technip is another similar contractor, http://www.mairetecn...ecovery-unit-in '> http://www.mairetecn...ecovery-unit-in .
Having shortly met some of the companies mentioned in above posts, impression was that every one was versatile enough to provide numerous technologies. Each one can offer useful advise on the best SRU plant according to its view. Assessment needs technological knowledge by Refinery Owner, who has to supply clear / realistic SRU input data to them and make decisions later. Communications on these matters may take time to end up with a specific technology and EPC contractor (e.g. a year, according to a local schedule in the past).
I cannot comment on feed gas composition given, companies will find the optimum way for it.

Note: I did not know that Linde supplies SRUs too, http://lppusa.com/international/web/le/us/likeleuslbpp30.nsf/repositorybyalias/lpp_sulfur_brochure/$file/2012%20SULFUR%20BROCH-Single%20page%20version.pdf '> http://lppusa.com/international/web/le/us/likeleuslbpp30.nsf/repositorybyalias/lpp_sulfur_brochure/$file/2012%20SULFUR%20BROCH-Single%20page%20version.pdf .

[Dacs]

I bet every one of us would have a licensor of choice, but don't let your (or anyone's) bias clout your decision in choosing the most appropriate among them.

I guess the best approach is to ask the more known licensors for a quotation and start from there. I think they won't deviate much from a technical standpoint and it will boil down to economics.

In my experience, the licensor would just supply the BEP and another (cheaper) contractor will handle detailed engineering and construction.

Your feed is a bit high on CO2, I personally was involved in an SRU project (inside a refinery) but it has around 80 mol% H2S.

[RoyenG]

Hi,

we were have an almost same case with your feed gas which need gas treating unit.
and from the feed gas (high content CO2), you will need an Enrichment unit before Sulfur recovery.

what we did before is, sent quotation to some licensors, and choose one licensor that can supply the whole acid gas treating system (some licensor can not supply all system (including Enrichment unit/Degassing, etc.) except Sulfur Recovery only).

you also can see what licensor can guarantee (more to term and conditions) and catalyst lifecycle.


Royen.

[Ceng]

Thank you all very much for sharing your experiences.

[kkala]

Is a tail gas treatment unit (TGU) included? http://www.topsoe.com/business_areas/refining/~/media/PDF%20files/Refining/topsoe_claus_tail_aug09_low_res.ashx. H2S output indicates so.
We had to have existing TGU and SRU revamped to increase sulphur recovery to 99.9% (very short involvement of me).
Basic Engineering by one and Detailed Engineering by another (as Dacs notes) is a classical procedure. Above mentioned project had that basis. Now Client is thinking of a lumpsum turn key project (including procurement and erection supervision) to expedite works.

Edited by kkala, 15 October 2012 - 06:50 AM.

[gegio1960]

Dear Ceng,
I've personally followed the SRU Licensor Selection as a part of Refinery Configuration/Optimization projects.
Then I've also participated, as Process Manager, to the subsequent FEED and EPC phases.
Your feed gas composition with high CO2 tell me that your SRU is not in a refinery but, maybe, in a Gas Plant or in a Gasification Plant.
Anyway, my experience is in accordance with some Member comments:
- go to a good Engineering Company (like Foster Wheeler, Fluor, Kellogg, Petrofac...) for PMC
- the PMC will choose with you three (or more) Licensors and will ask them for competitive offers
- my Licensor choose would be for Jacobs (Comprimo technology), Siirtec-Nigi, KTI (now in Tecnimont group) and Parsons
- the PMC will give you the recommendations for the Licensor Selection (or will do it directly)
- the selected Licensor will prepare the Basic Design and will provide the Special Equipment
- the PMC will develop the FEED and will start the competition for the EPC phase
- the selected EPC will develop detail engineering, procurement and construction (various Project schemes can be envisaged).
If you want more details, please ask directly to me thru the Messenger icon at top.
Kind regards.

[gegio1960]

Dhiren,
have you Shell SRU in your Plant?
Thanks and kind regards.

[SUPRIYAPRA]

Yeh I designed SRU and SCOT unit before 4 years with SHELL.

[Ceng]

Is a tail gas treatment unit (TGU) included? http://www.topsoe.com/business_areas/refining/~/media/PDF%20files/Refining/topsoe_claus_tail_aug09_low_res.ashx. H2S output indicates so.
We had to have existing TGU and SRU revamped to increase sulphur recovery to 99.9% (very short involvement of me).
Basic Engineering by one and Detailed Engineering by another (as Dacs notes) is a classical procedure. Above mentioned project had that basis. Now Client is thinking of a lumpsum turn key project (including procurement and erection supervision) to expedite works.

Dear kkala
Thanks a lot for your reply
We haven't considered any tail gas treatment unit. We want a vendor to design a SRU plant with above mentioned feed and also meet all our requirements.

[Ceng]

Dhiren,
have you Shell SRU in your Plant?
Thanks and kind regards.

Thanks gegio1960 a lot.
I'll consider your advise.

[Dacs]

Well... having a Tail Gas Treatment Unit (TGTU) depends on the owner's preference of maximizing sulfur recovery.

And I suppose environmental regulations will call for it anyway due to more stringent emission requirements.

While practically all licensors would employ Claus process (with some modifications), TGTU is a different story. You might as well check out different licensors and see what they offer.

[kkala]

Recently revised local (Greek) legislation calls directly (in writing) for high (99.9%, if well remebered) sulphur recovery, according to information from refineries. This necessitates modifications on existing SRUs+TGTUs.

Edited by kkala, 18 October 2012 - 06:14 AM.