The process of Crude Oil Storage Tank Cleaning is somewhat a challenge to many. It is a comprehensive activity involving the removal of the bottom crude oil sludge, treating the oil sludge and washing the receptacle . There is the conventional method of washing it and several scientific methods that come up every day as research goes on.
Starting with the conventional method, the sludge is manually removed from the tank bottom. It may take about 100 days depending on the number of personnel working on it and the machines being used. With more operators it can even take 2 months. At times tank cleaning machines that are remotely operated are used; this can take double the time taken above.
Once the sludge has been removed, it is treated. This results in it being separated into waste water, recovered oil and solid matter. All this happens inside the chamber after which it is pumped out of the storage chamber before cleaning.
Once all this has been done, the receptacle is subjected to high pressure cleaning to wash its walls, roof and floor. A process called sand blasting is then employed so as to de-rust and d-paint the chamber. This stage can take around 50 days for one team and 30 days if two teams are working simultaneously on it. The outer walls of the storage chamber will require another 1 t o2 months de-painting and de-rusting. One can choose to sue the more expensive but effective ultra-high pressure cleaning so as to save time.
There is also a one step tank cleaning technology in use. It is more efficient than the conventional method and takes relatively less time. Here, nozzles are fitted on top the storage chamber and diesel is pumped through them into the sludge. This washes the sludge after which the mixture of diesel and sludge is pumped out of the receptacle.
Even though this method is more efficient than the conventional one, some sludge will still remain solid and stuck to the tank base. This may take up to four months to dissolve then the mixture is pumped out into another tank. This means that an extra receptacle is required to store the mixture before it I separated.
A two step washing technology is also in use. This is an advanced method and is very different from the first two. It cleans oil tanks in a matter of weeks as compared to the 4 months for the other processes. The first step involves the use of submerged rotary jet mixer to dissolve the sludge into the oil solutions, a process called re-suspension. Around 90% of the hydrocarbons can be recovered using this process. This only takes 10 days, 7 days for equipment installation and 3 days for cleaning.
The second step can be skipped if the client feels so. But if there is a need, then the residual sludge is removed. And since it is only 10%, the process will take way less time. And after the thorough and violent mixing, the remaining sludge is quite soft and easy to handle as compared to when using the conventional method of Crude Oil Storage Tank Cleaning.
Starting with the conventional method, the sludge is manually removed from the tank bottom. It may take about 100 days depending on the number of personnel working on it and the machines being used. With more operators it can even take 2 months. At times tank cleaning machines that are remotely operated are used; this can take double the time taken above.
Once the sludge has been removed, it is treated. This results in it being separated into waste water, recovered oil and solid matter. All this happens inside the chamber after which it is pumped out of the storage chamber before cleaning.
Once all this has been done, the receptacle is subjected to high pressure cleaning to wash its walls, roof and floor. A process called sand blasting is then employed so as to de-rust and d-paint the chamber. This stage can take around 50 days for one team and 30 days if two teams are working simultaneously on it. The outer walls of the storage chamber will require another 1 t o2 months de-painting and de-rusting. One can choose to sue the more expensive but effective ultra-high pressure cleaning so as to save time.
There is also a one step tank cleaning technology in use. It is more efficient than the conventional method and takes relatively less time. Here, nozzles are fitted on top the storage chamber and diesel is pumped through them into the sludge. This washes the sludge after which the mixture of diesel and sludge is pumped out of the receptacle.
Even though this method is more efficient than the conventional one, some sludge will still remain solid and stuck to the tank base. This may take up to four months to dissolve then the mixture is pumped out into another tank. This means that an extra receptacle is required to store the mixture before it I separated.
A two step washing technology is also in use. This is an advanced method and is very different from the first two. It cleans oil tanks in a matter of weeks as compared to the 4 months for the other processes. The first step involves the use of submerged rotary jet mixer to dissolve the sludge into the oil solutions, a process called re-suspension. Around 90% of the hydrocarbons can be recovered using this process. This only takes 10 days, 7 days for equipment installation and 3 days for cleaning.
The second step can be skipped if the client feels so. But if there is a need, then the residual sludge is removed. And since it is only 10%, the process will take way less time. And after the thorough and violent mixing, the remaining sludge is quite soft and easy to handle as compared to when using the conventional method of Crude Oil Storage Tank Cleaning.
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