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Good Practices developed at Bottom of the Barrel's
2002 Coking.com Best Practices Seminar in Houston, TX.
QUENCHING
1. Auto-cooling... based on:
- Temperature and pressure
- Flow and level
- Time delays and spikes
- This reduces stress on drums, required manpower and it gives consistency among shifts.
2. Fill drum during cooling
- Overfill with water to blowdown
- Put to atmosphere at the top level indicator
- Overflow to put when out of blowdown
3. Switch straight to blowdown; stay out of the frac with steam stripping - can cut 30 to 60 minutes of cycle time.
Drum Steaming &: Quenching
| Oprt |
Cycle Time |
Stm to Frac |
#/Hr. |
Coke VCM |
Stm to Blow |
HGI |
Sludge Injection |
| Anode |
20 hrs |
30 min |
|
6% 98# |
2 2/1 Hrs |
|
|
| Shot |
18 hrs |
30 min |
10k |
|
1hr/30k |
|
100 b/40 min |
| Shot |
18 hrs |
30 min |
15k |
98% |
45 min/30k |
|
|
| Shot |
16-18 hrs |
30 min |
|
|
45 min/40k |
|
|
| Anode |
22 hrs |
30 min |
5k |
10% cot 960F |
3 1/2/15k |
80 |
|
| Shot |
18 hrs |
15 min |
5k |
|
45 min/15k |
|
100 b/20 min |
| Sponge |
16 hrs |
45 min |
|
5-7%cot 935F 18# |
45 min |
55 |
yes |
| Drum Diameter |
Type |
Time |
Soak Time |
Water Rate/Start & Finish |
M/C |
Total H2O gallons |
| 22 ft. |
M |
6-7 hrs. |
- |
210 gpm / 900 gpm |
C |
|
| 27 ft. |
H/C |
6-7 hrs. |
- |
- |
C |
160 - 180,000 |
|
H/C |
6 hrs. |
- |
200 - 1200 |
M |
|
| 30 ft. |
H/C |
6 1/2 hrs. |
- |
300 - 1200 |
C |
270,000 |
| 24 ft. |
M |
4 hrs. |
- |
75 |
C |
|
| 28 ft. |
H/C |
4 hrs. |
- |
100 |
C |
180,000 |
| 29 ft. |
H/C |
5 hrs. |
(1) |
|
C |
|
C = Manual Based versus Computer Based
H&C/M = Hahn & Clay versus Mechanical
| Steam Out Time |
Drain Time |
Pressure Time |
Drum Age |
Warm-up Time/Temperature |
Cutting Time |
| 30 min. |
3 hrs. |
30 min. |
12 yrs. |
3 hrs. |
3 hrs. |
| 1 1/2 hrs. |
2 hrs. |
|
7 yrs. |
2 hrs. |
3 hrs. |
| 30 min. |
1 hr. |
20 min/20# |
6 yrs. |
3 hrs./300 degrees |
|
| 20 min. |
1 hr. |
20 min |
6 mnths. |
2-4 hrs/400 degrees |
1-4 hrs. |
| 30 min. |
2 hr. |
30 min/40# |
15 yrs. |
5 hrs./550 degrees |
1 hr. |
| 1 hr. |
1 hr. |
30# |
7 yrs. |
4 hrs./450 degrees |
1-3 hrs. |
| 30 min. |
|
30 min @ 35# |
11 yrs. |
4 hrs./350 degrees |
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