Gachsaran Olefin Project
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1 The Facility
GACHSARAN OLEFIN PLANT is located at Gachsaran petrochemical complex in Gachsaran, Kohgiluyeh-va-Boyerahmad province, Iran.
The Olefin plant is an integrated, ethane-based cracker, to produce ethylene, C3+, and hydrogen.
The ethane feed is supplied from the 2nd Bidboland refinery.
The required utilities of the Gachsaran Olefin Plant will be provided by the utility units and all necessary packages located inside the plant.
2 Process Introduction In Our Scope
This part describes the process of CSW+ZLD plant, based on a softening, an ultrafiltration, two stages of reverse osmosis (RO1+High pressure RO), and a multiple effect evaporator.
Our treatment process for GACHSARAN OLEFIN PLANT is planned to receive RO brine from water treatment plant with an average capacity 6000 m3/d and this flow rate can be increased to 8400 m3/d.
The softening step consists of the following main equipment:
- CSW Storage tank
- Softening reactor
- DAF separators
- Sludge storage tank-thickener
- Press filter
After softening step, water passes through a self-cleaning filter (100 microns) then Filtered water comes to UF trains. each train has 36 modules of dead-end membranes. Effluent from UF is the feed of advanced treatment.
- UF
- RO
- High Pressure RO
- ZLD
- Client : Tyler Inc.
- Location : California City FL 23059
- Area : 1.690 m2
- Finished On : September 17, 2014
- Value : $789.000,00
- Remarks : The project was completed under the budget, with the savings returned to the owner.
3 General overview and process description
After discussion and calculation of High Operation Cost mainly from chemical consumption, that was decided to consider ZLD Package for treatment of all stream in Ilam complex.
The ZLD system is consists of:
*Degasser system: A degassing system consisting of a degassing column, flash tank, and set of preheaters has been provided to separately degas the spent caustic stream before mixing it with the wastewater.
*Four Effect Forced Circulation Evaporation:
Heating of wastewater by pre-heaters and perform the process of evaporation and separation in the evaporator.
*Pusher Centrifuge & Dryer System
for separating the salt and crystal-clear water from the wastewater feed.
Schematic of process is shown as below:
