What are the consequences if acid water stripping is carried out without a feed water tank and the liquid is fed directly into the tower?
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Conventional acid water stripping involves feeding the material from a raw water tank to a deodorization unit, then to an acid water tank, and finally to the tower. What impact will it have on the entire system if two tanks are removed, and the resulting acidic liquid goes directly into the degreaser before entering the tower? Who can give an analysis?
The performance of the oil remover is difficult to guarantee, and it is highly affected by fluctuations in the upstream equipment; should any abnormalities occur upstream, the device’s buffering capacity is insufficient, which can lead to issues such as tower overpressure
Firstly, the oil removal effect is insufficient; the oil and gas that is removed along with the gas will enter subsequent units or processes along with the acidic gas； Acidic water stripping towers are generally used for stripping H2S and NH3; they require both hot and cold feed streams. With a processing capacity of 18 t/h, if there are no storage tanks to act as a buffer, the pumps can easily get emptied. I don’t think those two tanks are necessary.
Upstream fluctuations are basically not an issue, because for the solvent regeneration rich liquid, there is only a flash tank and no storage tank; it goes directly into the tower, and its properties remain similar. If it’s just for buffering, there’s no real need for it
My question is mainly about removing the deodorization unit; something similar to a solvent regeneration unit, where the feed water goes into the tower after passing through the oil remover
By fluctuations, I mean things like oil contamination
The raw water tank serves to provide a mean value and act as a buffer.
I think the function of the raw material water tank is mainly: buffering, settling coke powder, removing light hydrocarbons and some acidic gases; and most importantly, removing oil
Without a tank, the tower is difficult to operate; its temperature can rise easily, which may lead to a collapse of the tower
High impurity content and short operating time； If the raw water contains a high level of oil, the operation of the stripping tower will not be possible to some extent; the tower cannot function properly, and there’s no need to say anything else about that.
Theoretically, it’s not necessary! In fact, some companies really didn’t do it either, and there’s basically no problem! The biggest problem is that when the system is unstable or fluctuating, the untreated water that does not meet quality standards has nowhere to go. There are acidic water tanks that can be returned. Additionally, the acidic water tank itself acts as a buffer for the system, preventing widespread shutdowns due to issues with the acidic water system. Therefore, it is generally considered necessary to proceed, while also taking appropriate margins into account. Because the probability of problems occurring in sulfur treatment units is still relatively high