primary reformer
DESCRIPTION
Primary reformer presentationTRANSCRIPT
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PRIMARY REFORMERF201NITHIN KUMAR K S T. NO : 2660
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CONTENTSINTRODUCTIONCONTRUCTION FURNACE INLET & OUTLET COFFIN BOX TUBES BURNERCONCLUSION
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INTRODUCTIONReforming is a process of converting higher molecular weight hydrocarbon into smaller fraction.It is an endothermic reaction.Steam naphtha reforming process.It is a catalytic reformerICI London
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REFORMER FURNACEOuter wall Carbon steel Refractory/Ceramic wool lining Floor Refractory bricks & carbon steel casingRoof ceramic moduleFurnace roof, walkways & 50% of the tube weight is carried by roof trusses.Flue gas tunnels of refractory bricks are built in sections to allow thermal expansionFurnace length : 62 feet 7 inch width : 32 feet 6 inch
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CUT VIEW OF REFORMER
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FEED LINEFeed stock inlet 2Further divides 2 4 RisersRisers cross header 44 long pigtail connected to each cross header 16Primary header 14 short pig tails 224 MOC : Carbon steel
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OUTLET 224 outlet pigtails 4 outlet header 2 rows of tubes single outlet header 56 Outlet header combines to form a single transfer main. MOC : Incolloy
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OUTLET HEADER
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COFFIN BOX Two 2 outlet header in each coffin box. Lined with refractory bricks to minimise heat loss.
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TUBES No. of tubes : 224 Rows : 4 56 Overall length : 12.326 m Heating length: 10.668 m ID : 113mm OD : 130.6mm Tube pitch : 13 inch
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MOC OF TUBES Paralloy H39WM HP Microalloy Composition: C : 0.4% increases material strengthCr : 25% increases corrossion resistanceNi : 35% imparts high temp strengthNb : 1% increases creep strengthTitanium/zirconium Prevents formation of chromium carbide High temperature resistance Corrossion resistance
- CATALYST Top Portion : C-11-NK 47% Ni : 14 wt%Al2O3 : 65-70 wt%CaO : 10-14 wt%K2O : 1.4-1.8 wt%Carbon :
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BURNER Number : 60 (48 Naphtha & 12 dual) Rows : 5 Burners/row : 12 Burner pitch : 1524mm Combustion air temperature : 2720C Combustion air Pressure : 62mm of water Atomising steam : 3 Kg/cm2 & 1700C Top fired burner
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1, 2, 4 & 5 row Naphtha only 3rd row dual type Naphtha & steam mixed internally Atomising takes place Combustion takes place at the cone tipFuel gas flows through the outer tube Fuel gas ignites due to combustion of naphtha
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BURNER GUN
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COMBUSTION AIR MAINS FD fans Combustion air heated Flue gas Combustion air mains 5 rows Cross section area decreasing Further divides to 56 branchesDamper inlet air duct For isolation of the burner not to control the combustion air flow to burner
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COMBUSTION AIR DISTRIBUTION
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OUTLET COMPOSITION
DESIGN (%)PRESENT(%)ARGON0.010.01NITROGEN0.430.42METHANE9.399.33CARBON MONOXIDE11.898.95CARBONDIOXIDE15.2416.43HYDROGEN63.0564.86
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CONCLUSSION
Heart of Ammonia Plant Critical system
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