Technology

Operators
required

Working day

Total man-hour (man-day)

Conventional

Using pump and bull dozer entering the tank to remove bottom sludge
4,000 MT (100%)

15

120

1800

Remote control +
conventional
equipment

Remote control bull dozer, pumps, etc. Remove oil sludge
4,000 MT (100%)

10

240

2400

2S-TC

Step-1
P43 re-suspension
Recover soluble hydrocarbon
3,600MT (90%)

5

10

50

190

Step-2
Using conventional way Remove Oil sludge
400 MT (10%)

10

14

140

Tank
Washing Technology
(COW)

Utilizing diesel to wash tank (remove oil sludge) 4000MT (100%)

10

60

Oil Sludge

Reduction

in tank

Step 1:
P43
Re-spension• ．recover 90% soluble hydrocarbon

• reduction of bottom oil sludge

circulation pump

Driven P43

1-3

Shell-mounted P43

Recovery soluble hydrocarbon

1-3

14 inch gate valve

Pump controller

1-3

10 inch gate valve

Pump controller

1-3

14 inch tank cleaning hose

Linking pump and manhole of the tank

1-3

10 inch tank cleaning hose

Linking pump and manhole of the tank

1-3

Step 2: Remove 10% residual
bottom sludg

Used when oil sludge level is over edge of the manhole

Hot tapping machine

Used when oil sludge level is over edge of the manhole

1

Small crane

Mounting and dismounting P43

1

Diesel engine hydraulic power pack

To drive sludge pump & dozers

1 or 2

Mini bull dozer

Collect oil sludge In the tank

1

Oil sludge pump

Pumping oil sludge out from the tank

1-3

Hydraulic hose with reel

Linking hydraulic power pack and pump or bull dozer

1-2

Step 3:
Tank Washing & Tank de-rusting

High pressure steam cleaner

Cleaning tank wall and floor

1-2

Sand-blasting

Equipment
De-rusting & de-painting

1-2