Is it necessary to add an acidic water buffer tank at the top of the catalytic fractionation tower?
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A acidic water buffer tank has been added to the water pocket located below the three-phase separation vessel for gas, water, and oil at the top of the distillation tower. Is this necessary? Why can’t the acidic water be directly pumped out using a pump from the water tank?
Either one is fine; both approaches exist, each with its own advantages and disadvantages. There are no technical issues; it depends on the designer’s level of understanding of the problem~~~
Reply to 2# humin: Could you go into more detail? What are the differences?
Look at the amount of acidic water produced by the device; using a dehydration pack along with a pump to pump it out allows for control of the level. If the level can be controlled, there’s no need to add anything else. Otherwise, the oil won’t be able to be recovered if it ends up in the buffer tank. None of the manufacturers we’ve worked with have done this
The design of the design institute involves adjusting the boundary conditions; however, due to the influence of the crude oil, the oil-water separation time can sometimes be long, making it difficult to control acidic water containing oil. Later, an additional unit was added to increase the residence time.
It prevents operational fluctuations in subsequent equipment caused by acidic water carrying oil, and it also meets environmental protection requirements!
The acidic water from the reflux tank at the top of the catalytic fractionation tower is sent to an acidic water buffer tank via a water-in-oil system; the function of this buffer tank is primarily to further separate the oil present in the acidic water, and it is usually installed by the company itself later on； The acidic water is sealed in a dehydration package and transported to the acidic water treatment unit. The entire system, including the degassing tank and the oil-scraping tank, is sealed within the acidic water treatment facility; therefore, it has no impact on environmental protection nor on the acidic water treatment unit itself ； The reason companies install acidic water and oil tanks is to recover the high-octane gasoline contained within them in order to increase their profitability