Furnace

Case study n°1

Duration of the cleaning: 4 days.

	BEFORE CLEANING	AFTER CLEANING	DELTA
Feed	821 m3/hour	871 m3/hour	+50 m3/hour (+6.1%)
Radiation Cell temperature	866°C	736°C	-130°C
Convection Cell temperature	357°C	308°C	-49°C

Source: Furnace T2F****

Furnace

Case study n°2

Duration of the cleaning: 4 days.

	BEFORE CLEANING	AFTER CLEANING	DELTA
Radiation Cell1 temperature	847°C	667°C	-180°C
Radiation Cell2 temperature	842°C	648°C	-194°C
Convection Cell3 temperature	850°C	639°C	-211°C

Source: Furnace 40*A, 3 Radiations cells

Ethylen Furnace

Case study n°3

	ENG. UNITS	BEFORE CLEANING	AFTER CLEANING
Feed (naphta)	kg/hr	9 071	9 403
COT	°C	825	825
Fuel gas flow	kg.hr	1 500	1 426
Fuel gas pressure	bar g	1.60	1.33
O2	vol %	2.62	2.54
Excess air	%	1.142	1.138
Draft	mmH2O	3.45	3.31
Fan speed	rpm	1 550	1 400
Damper O.P.	%	106.9	100.0
Stack temperature	°C	254	205
Ambient temperature	°C	20	20

Fuel gas net heating value : 12 200 kcal/kg.
Combustion air required : 17.38 kg/kg fuel.