Section 100
Naptha Hydro- Desulphurization
Plant

Section 150
Stretford Sulfur Recovery

Section 200
Hydrogen Plant
Catalytic Rich Gas (CRG)

Section 300
Water Treatment:
Deionization Plant

Support Facilities

Process
Instrumentation
Drawings

 

 

 

 

 

 

 

 

Synthetic Natural Gas Plant

Philadelphia, PA

Plant Details

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 The SNG facility was constructed in 1977 but has seen very little operational activity.  The SNG Facility employs the British Gas hydro gasification process to convert naptha feedstock into SNG at a design rate of 60,000 decatherms per day, and was constructed by Foster Wheeler Energy Corporation.  The principle areas of the plant that are offered for sale are as follows:


Naptha Hydrodesulphurization Plant
Section 100


This section provides a water wash system to remove possible salt contaminants from the raw naptha feedstock.  A deaerator is also present in this section to strip dissolved oxygen from the naptha feedstock.  The HDS section will treat up to 117,500 lbs/hr of heavy naptha of 2000 ppm sulfur to a sulfur content reduced to 5 ppm.

Vessels                   Exchangers                 Pumps                  Compressors                  Mixers

Process Flow Diagram

 


Stretford Sulfur Recovery

Section 150

 The bulk of the sulfur in the plant naptha feed is removed in the hydrodesulphurization (HDS) unit, the sweet naptha going to the SNG unit and the sulfur leaving the HDS unit as H2S in the sour gas purge. The sour gas, composed of mainly light hydrocarbons, is burnt in the plant fuel system. In order to reduce pollution of the atmosphere by combustion products to an absolute minimum, the H2S is removed from the sour gas before combustion, by the Stretford Process.
The Stretford Process was developed by the North Western Gas Board, now part of the British Gas Corporation, who license the process.  The Stretford Process for H2S removal is by continuous liquid washing using an adequate alkaline solution containing dyestuff intermediates.  The H2S+O is converted to elemental sulfur, which is separated from the solution, washed to remove the  solution from the sulfur cake, and stored ready for disposal.    The Stretford Unit that we are offering is designed to treat 78.71 lb. mol/hr of sour gas containing up to 7.34 lb. mols of H2S and to reduce the H2S content of the sweet gas to less than 1 vppm.  Alternatively, the unit can treat 148.92 lb. mols/hr of sour gas containing up to 1.84 lb. mols H2S.

Vessels                   Exchangers                   Pumps                 Blowers
 


Hydrogen Plant
Catalytic Rich Gas (CRG)
Section 200

The CRG process employs the British Gas hydro gasification concept.  Full capacity standby reactors are available for the first stage (CRG) reactor and the second (hydro gasification) reactor. Supplemental equipment is available for shut down and start up operations and for catalyst reductions.  Hydrogen is produced in the CRG section by combining rich gas or natural gas with superheated steam over nickel catalyst beds in a hydrogen reformer which has a capacity of 5.9 MMSCFD of  hydrogen. A Benfield hot potassium carbonate process accomplishes CO2 removal.  A  PSA purification skid is available for this H2 plant
 that elevates H2 purity to 99.9% or higher, if desired.

Vessels                   Exchangers                 Pumps                   Compressors
 


Deionization/Demineralization Plant

Support Facilities
Section 300

Support facilities include drums, tanks, pumps, compressors, blowers, de-aerator, boilers, electrical systems and a full demineralization plant/water treatment package.

Vessels                  Pumps                Compressors              Blowers

De-Aerator        H2O Treatment       Transformers
 

   

 

Flare Tower
 

                       Tower                        

              
 

 

 

Process & Instrumentation Drawings
 

                       Drawings                        

              
 

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