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Primary reformer presentation
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PRIMARY REFORMERF201NITHIN KUMAR K S T. NO : 2660
CONTENTSINTRODUCTIONCONTRUCTION FURNACE INLET & OUTLET COFFIN BOX TUBES BURNERCONCLUSION
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
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
CUT VIEW OF REFORMER
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
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
OUTLET HEADER
COFFIN BOX Two 2 outlet header in each coffin box. Lined with refractory bricks to minimise heat loss.
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
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
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
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
BURNER GUN
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
COMBUSTION AIR DISTRIBUTION
OUTLET COMPOSITION
DESIGN (%)PRESENT(%)ARGON0.010.01NITROGEN0.430.42METHANE9.399.33CARBON MONOXIDE11.898.95CARBONDIOXIDE15.2416.43HYDROGEN63.0564.86
CONCLUSSION
Heart of Ammonia Plant Critical system
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