4-12
All Rights Reserved. Copyright © 2004, Yokogawa Electric Corporation
TI 11M12A01-01E
4. Application
<Toc> <Ind>
a) Petroleum refinery process fired heater example
There are two possible locations for the sample point in fired heaters for petroleum refining and
petrochemicals: in the stack, or in the vicinity of the furnace outlet (convection zone).
T0411.EPS
Stack
Furnace outlet
(convection zone)
L2, L3
H2, H3
D1, D2
D5, D6
Explosion proof type with terminal box
may also be selected.
T0412.EPS
Name
Stack
Convection
Temperature
°
C
Approx. 300 to 500
Approx. 600 to 900
2
1
Outlet
Outlet
Outlet
Inlet
Inlet
Inlet
Con
v
ection Section
Radiant Heating Section
Steam
Superheater
Section
Process Fluid
Preheat
Section
Steam
Superheater
Section
Petroleum refinery process
fired heater
Furnace
Window Box
Air Preheater
Stack
Draft Blower
Exhaust Blower
F0412.EPS
1
2
1
2
3
4
5
6
1
6
4
2
5
3
May 31, 2004-00
