1

PSV PSV

Anti-Foam Vent Vent Anti-FoamQuenchQuench

SM Wt SM Wt

PIT

CCD CCD

PIT

Blow Down

Blow Down

M F M F

Heater

IDLE CO

KING

2

PSV PSV

Anti-Foam Vent Vent Anti-FoamQuenchQuench

SM Wt SM Wt

PIT

CCD CCD

PIT

Blow Down

Blow Down

M F M F

Heater

COKING

TOP BOTTOMHEADING

3

PSV PSV

Anti-Foam Vent Vent Anti-FoamQuenchQuench

SM Wt SM Wt

PIT

CCD CCD

PIT

Blow Down

Blow Down

M F M F

Heater

COKING

STEAMING

4

PSV PSV

Anti-Foam Vent Vent Anti-FoamQuenchQuench

SM Wt SM Wt

PIT

CCD CCD

PIT

Blow Down

Blow Down

M F M F

Heater

COKING

CONDENSAT

E DRAINI

NG

5

PSV PSV

Anti-Foam Vent Vent Anti-FoamQuenchQuench

SM Wt SM Wt

PIT

CCD CCD

PIT

Blow Down

Blow Down

M F M F

Heater

COKING

PRESSTESTIN

G

6

PSV PSV

Anti-Foam Vent Vent Anti-FoamQuenchQuench

SM Wt SM Wt

PIT

CCD CCD

PIT

Blow Down

Blow Down

M F M F

Heater

COKING

PRESSRELEASING

7

PSV PSV

Anti-Foam Vent Vent Anti-FoamQuenchQuench

SM Wt SM Wt

PIT

CCD CCD

PIT

Blow Down

Blow Down

M F M F

Heater

COKING

VAPOUR

HEATING

8

PSV PSV

Anti-Foam Vent Vent Anti-FoamQuenchQuench

SM Wt SM Wt

PIT

CCD CCD

PIT

Blow Down

Blow Down

M F M F

Heater

CHANGE

OVER

CHANGE

OVER

9

PSV PSV

Anti-Foam Vent Vent Anti-FoamQuenchQuench

SM Wt SM Wt

PIT

CCD CCD

PIT

Blow Down

Blow Down

M F M F

Heater

STEAM QUENCHING

COKING

10

PSV PSV

Anti-Foam Vent Vent Anti-FoamQuenchQuench

SM Wt SM Wt

PIT

CCD CCD

PIT

Blow Down

Blow Down

M F M F

Heater

STEAM QUENCHING

COKING

11

PSV PSV

Anti-Foam Vent Vent Anti-FoamQuenchQuench

SM Wt SM Wt

PIT

CCD CCD

PIT

Blow Down

Blow Down

M F M F

Heater

WATER QUENCHING

COKING

12

PSV PSV

Anti-Foam Vent Vent Anti-FoamQuenchQuench

SM Wt SM Wt

PIT

CCD CCD

PIT

Blow Down

Blow Down

M F M F

Heater

WATER DRAINI

NG

COKING

13

PSV PSV

Anti-Foam Vent Vent Anti-FoamQuenchQuench

SM Wt SM Wt

PIT

CCD CCD

PIT

Blow Down

Blow Down

M F M F

Heater

RAEDY FOR

DECOKING

COKING

A E FDCB

1 32

14

GR DCUFG

Firing

A E FDCB

1 32

15

PDRP DCUFG

Firing

A E FDCB

1 32

16

GR DCUPilot

A E FDCB

1 32

17

PDRP DCUPilot

A E FDCB

1 32

18

GR DCUFO

Firing

A E FDCB

1 32

19

PDRP DCUFO

Firing

A E FDCB

1 32

20

GR DCU

Emergency

Steam

A E FDCB

1 32

21

PDRP DCU

Emergency

Steam

HEATER CELL CONVECTION

To isolate or to control the isolation valves of Pass C/Vs within minimum time is not possible as those are on the convection platform of the heater

Combustion AirTypical Heater Burner Assembly & Air Resistor

Difficulty in heater operation as the burner assembly and air resistor are unapproachable

•Heater stack height is lower than coke drum cutting platform.•Chances of having hazardous ambience at the cutting platform if wind direction is towards it.

GUJ

DCU

PDRP DCU

• One DCV for each Coke cutting pumps.

To Coke Drums

Bypass

Bypass

To Coke Drums

DCV

DCV

DCV

Coke cutting pump

Coke cutting pump

COKE DRUM

Vertical Water Pump Motors get submerged during water draining and hydraulic decoking of drums.

27

BLOWDOWNTOWE

R

T<176

Wax tailing Steam From V-1,2,3,4

Blow downSettling Drum

To Main Fractionator

To Coke Drum As Quench

BEFORE AFTER

BLOWDOWNTOWE

R

T<200

Wax tailing Steam From V-1,2,3,4

Blow downSettling Drum

To Main Fractionator

To Coke Drum As Quench