Issues regarding the sludge tank in the acidic water stripping unit.
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When removing oil from the acidic water tank, the pressure in the sludge tank increases, which results in slow flow of sludge into that tank and makes oil removal inconvenient. Generally, it is necessary to open the vent on the oil tank top to relieve pressure, but this will pollute the environment. There will also be dangers. Ours is discharged directly. I would like to ask the experts here if there are any good methods for dealing with this venting issue.
There are nitrogen sealing pipelines at the top of both the sludge oil tank and the raw water tank, which are connected to the water seal tank. The pressure at the top of the sludge oil tank and at the top of the raw water pipeline should be equal. Does your sludge oil tank have a nitrogen sealing pipeline?
Reply to 1#: It seems that on both the top of the sewage tank and the top of the sewage storage tank, there are non-condensable gas lines. These lines are usually connected to the nitrogen seal on the top of the sewage storage tank, and from there they are connected to the water seal of the sewage storage tank. When the pressure in these non-condensable gas lines reaches a certain level, the water seal is broken to allow pressure to be released
Reply to 2# string_0: No, ours is just a pipeline that leads to an open space. How exactly is this done? Could you introduce it? Thank you
Reply to 4# linweihua6: I’ve never heard of \"alkaline sealing\". Could you give me some information on it? Thank you
You know the water-sealing tank? You just need to fill it with alkali; if you want better results, you can make it larger
If there is no nitrogen seal line, the only option is to vent directly, which is relatively dangerous; you must be using high-pressure venting, right? Be careful not to drain the oil completely, to prevent acidic water from entering the sludge tank; the release of acidic gases can be fatal.
Reply to 8# string_0: Our freeboard is very low, less than two meters on the topping platform. It’s hard to tell for sure whether the oil has not been completely drained
Given the situation you have described, the appropriate approach is to carry out technical modifications by connecting the top of the oil tank to the top of the acidic water tank, thereby creating a connection and preventing pressure buildup; operating under the current conditions is extremely dangerous.
Yes, in our plant, the oil skimming tank for the acidic water tanks is connected at its top vapor line directly to the vapor line at the top of the large acidic water tank. The vapor from the large acidic water tank is routed to an absorption tower, where it is absorbed to prevent the formation of unpleasant odors. This works well.