14 replies to this topic

[victor.petrochem]

I am a final year student and making my project on "Minimization of Flaring by Flare Gas recovery Unit".

My interest is to prepare a dynamic model for the project, which will require the functions involved with flare gas recovery, and a data sheet of any process plant where a flare system is used (preferably of a refinery or petrochemical plant).

Could someone please help me by telling where can I find the required data.

I will be really thankful for the help.

[Zauberberg]

Google around, there is a lot of info available. See also: http://www.cheresour...e-gas-recovery/

[ankur2061]

Victor,

Have a look at this article:

http://www.argoengin...GasRecovery.pdf

Very informative on FGRU.

Hope this helps.

Regards,
Ankur.

[victor.petrochem]

Thank a lot Ankur for your reply, the article is really very useful.

[ankur2061]

Thank a lot Ankur for your reply, the article is really very useful.

Victor,

Additionally I had prepared a standard for a middle east O&G titled "Specification for Vent & Depressurization System" where I have given some overview of "Zero Flaring Concept" & I am reproducing the same for the benefit of all readers:

Zero Flaring Concept

Zero flaring involves not operating the flare system during normal operations of the oil and gas installation whether onshore or offshore. Essentially the zero flare installation is designed to recover or recycle the waste gas generated during normal operations. Generally the most common method employed to have a zero flare installation is to provide a “Flare Gas Recovery System (FGRS)”. See sub-section 4.7.1 on evaluation and design of FGRS.

Zero flaring however, does not eliminate a flare system installation per se, but involves major changes in the design and operation philosophy of flare systems.

The following may be summarized for zero flaring concept:

a. Flare system is an essential safety part of any offshore or onshore oil and gas installation and is able to relieve gas from the process during upset or emergency conditions.
b. New installations should be designed for a normally ‘not lit’ flare utilizing latest technologies permitting recycle and recovery of waste gas during normal operations and efficient flare
ignition systems preferably without flare pilots.
c. Existing flare installations should be modified to reduce/eliminate flaring considering the overall cost benefit analysis. Refer to 4.7.1 for sources of waste gas during normal operation.
d. Zero flaring permits reduced CO₂ emissions thereby providing a mechanism to comply with the CO₂ emission regulations as legislated by the Kyoto Protocol.

Zero flaring prevents costly maintenance schedules and downtimes due to flare system failures.

Flare Gas Recovery System

A flare system can receive waste gas from several sources during normal operation, which may include but are not limited to the following:

a. Purge gas to prevent air ingress to the flares
b. Inadvertent leakage from relief valves, depressurization valves connected to the flare header(s).
c. Controlled disposal of small quantities of gas to the flare system on a regular basis.

A FGRS is a step towards achieving the goal of Zero Flaring thereby leading to the larger goal of ensuring environmental sustenance and long-term socio-economic development.

Hope this helps.

Regards,
Ankur.

[victor.petrochem]

Thanks Ankur once agin for you information.
Zero flaring as you have explained will be a really very useful concept to be adapted,but as far as I have studied, zero flare has been employed on a pilot basis in Adnoc Refineries Saudi, whereas it is yet to be tested in further areas. Although it will be a useful tip for my project, but I am facing difficulties with some basic stuffs:
- Modelling equations for a separator used in FGRU requires the composition of the feed, since in the 3-phase separator the inlet stream consists of vapors with several components C1 to C10 or higher along with, CO2, H2s and other gases, and also liquid seal from the liquid ring compressor. While the exit stream is divided into gaseous having upto C6 or bit higher, liquid stream with C7 to C10 or higher, and also a separate liquid outlet for estranged liquid from liquid ring compressor. So the problem comes is preparing a component balance for the system, in which I am facing difficulties at present.
- In the liquid ring compressor I am facing difficulty in writing a mass balance equation as mass input includes vapors from KOD as well as recovered seal liquid+fresh seal liquid, where the quantity of fresh seal liquid is function of purity of recovered liquid (i.e. whether it contains sour gases or not), so how do I decide a mathematical equation for amount of fresh liquid to be added as a function of purity of recovered liquid.

I will be thankful for the reply,
Regards,
victor

Edited by victor.petrochem, 02 April 2010 - 12:09 PM.

[dali]

Hey,everyone,
I was led here by google,and very happy to meet you here.

My name Dali(Miss),locaed in China.Beijing ,and currently undertake "Zero flare gas"project in Nigeria.
It is in the initial stage to work out feasibility study report.
I am responsible for translation,yet the technical words a bit difficult to me.
I am wondering if I can get help here,I'd like to get an advisor who can review my report and make it authentic in english? tks.

I have email
zhangyuyimeng@yahoo.com.cn
MSN:ymc_sue@hotmail.com
QQ:8963-96421
Skype:zhangyuyimeng
Mobile:86-1588-964-9683

[dali]

Hi,Victor
I am sure you are guru in zero flare gas filed.
Is it possible that we can talk? Thank you

Regards
Dali

[dali]

Mr.Ankur is guru.nice to meet you here.
I hope we can have chance to talk,and can you baby me?

Regards
Susan

[ankur2061]

Dali,

Wei Ni Hao!

I am sorry my chinese english is a littlle weak. Can you explain what is exactly required by you?

By the way, I spent 4 months in a place called RongSheng, Zhejiang province while commissioning a Chemtex/DuPont technology polyester plant.

Regards,
Ankur.

[dali]

Mr.Ankur,
Ni hao! I am very thankful for your reply.
You are so kind .

We are currently partnering with american nigeria company undertaking "zero flare gas" project in oil&gas fileds in Nigeria to eliminate flare gas.We are co-investor of the project and will finance from China-Africa Development Fund as equity.
It is in the initial stage,we are working out technical plan at the moment.
After that,we will call on 3-5 expert team to visit Nigeria to get acquant with ourselves about sample site and conditions,and fully discuss the feasibility report and participation.

I am responsible for communication,while I am not engineer,and i am facing some difficulties in translation especially when I need explain the technology..so..I am thinking if I can get help from someone ,I prefer he is both
engineer and perfect english and can baby me,can check my documents before sending to our partner....

I feel i am the lucky one,when i googled i came here ...Thank you very much,sir

Best wishes
Dali

[vishal_rwt]

i am chemical engineering student of final year. i have to make a project on Flare Gas Recovery Unit. please help me with anything related to FGRU working or design.

[Nazi]

hello everyone
Does anyone has any information regarding designing of flare gas recovery systems?
how to interpret the flow data that is obtained? I mean if we have a graph for gas flaring for each month of the year, how I should obtain the capacity of the system?
And also how should I design the rest of the system? for example, which compressor to choose? how many of them should be chosen? 2 or 3? parallel? 2-stage or other things?
I'd appreciate your help. Thank you in advance.

[jrtailor09]

Dali & victor petrochem

Please refer below link for the flare gas recovery project.

This is implemeted by one the largest grass route refinery in world. ( Reliance, Jamnagar).

http://www.pcra.org/...al/flaregas.htm

This is the first company in india which has implemented flare gas recovery project.

Regards,

Jatin Tailor

[ankur2061]

Refer the attachment for an overview on FGRS design.

Regards,
Ankur.

Attached Files

•  fgr_min_flaring_hp.pdf   1.24MB   161 downloads

Edited by ankur2061, 21 May 2012 - 12:45 PM.