A beginner in storage and transportation has questions and needs help
Thread Content
I’ve only been in the design industry for a short time and am still a complete beginner. I have a few quite basic questions that I’d like to ask the experts here; I hope they can help me figure them out. I am currently working on a tank farm design, and I have the following questions: 1. For example, there are two gasoline tanks and one centrifugal pump; the gasoline is delivered from the reforming unit. Should the fuel be fed into both tanks simultaneously, or should it first be poured into one tank and only after that into the second tank? 2. Can the storage tank take in material while discharging it? 3. All four gasoline storage tanks are equipped with nitrogen seals. When calculating the nitrogen consumption, should it be the sum of the discharge volumes from all four tanks, or just the discharge volume of one tank? 4. Storage tanks for different oil products are all equipped with purging systems. Should the purging be carried out simultaneously, or for multiple tanks containing the same type of oil at once, or one after another? According to the standards, the speed of steam purging must be no less than 30 m/s. Does this refer to a flow velocity of no less than 30 m/s at the DN25 fitting, or a flow velocity of no less than 30 m/s in the DN50 steam pipeline? How to calculate steam consumption? I hope fellow sailors can help me figure this out. Thank you all~
To your several questions, the brief answers are as follows: 1. There are two gasoline tanks; generally, feeding is done one tank at a time, as simultaneous feeding would cause fluctuations in the liquid level. The same goes for discharging. 2. The feed and discharge usually occur in different tanks, allowing for a settling time while also preventing the formation of vortices. 3. The amount of nitrogen sealing needs to be determined based on the operating conditions; if additional effects are required (such as thermal breathing), adjustments must be made. 4. Except during startup, the maintenance and purging of storage tanks are generally carried out in a sequential manner, one tank at a time, to ensure that there are available tanks in emergency situations while also reducing waste of oil at the bottom of the tanks. As for the steam purge requirements, they refer to the required velocity at the final outlet.
1. There are two gasoline tanks; usually, feeding is done one tank at a time, as simultaneous feeding can cause fluctuations in the liquid level. If the pump flow rate is high, it is possible to consider feeding both tanks at the same time. The same goes for discharging. 2. This mainly depends on what type of inlet is used? It can be either a diffuser-type or a dilator-type design; the inlet and outlet are usually in different tanks, allowing for a settling time while also preventing the formation of vortices. 3. The amount of nitrogen sealing needs to be determined based on the operating conditions; if additional effects are required (such as thermal breathing), adjustments must be made. 4. Except during startup, the maintenance and purging of storage tanks are generally carried out in a sequential manner, one tank at a time, to ensure that there are available tanks in emergency situations while also reducing waste of oil at the bottom of the tanks. As for the steam purge requirements, they refer to the required velocity at the final outlet.