Regarding the calculation of liquid seals
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Hello, everyone who is into the sea! I have a question: As shown in the diagram, Tank A contains 80% sulfuric acid at a pressure of -70 KPA. It is necessary to maintain a liquid level of 300 mm; a liquid seal control device ② is installed at the outlet, after which the fluid enters Tank B. The pressure in Tank B is -80 KPA, and from there the fluid proceeds to Tank C (with a pressure of -80 KPA) ； May I ask what appropriate heights are for ① and ②?
It depends on the specific liquid you use for sealing
I recommend the book \"Principles of Chemical Engineering\". How should the medium for the liquid seal be selected, and what is the density of this medium? Since calculation is involved, one needs to understand its principles; simply applying formulas blindly belongs to the realm of design. Can you really be sure about that? For reference.
The liquid seal consists of 80% sulfuric acid as the material inside it； Density 1742 Kg/m3
If pipe resistance is not taken into account, the water seal height at the 2 locations should be 300. As for the water seal height at the 1st location, it should be such that the hydrostatic head resulting from the height difference between the liquid level in B and that in A is exactly 10 KPa. These are my personal opinions; I haven’t done any detailed calculations, so please correct me if there are any mistakes.
It’s exactly the opposite of what the people upstairs think; I hope everyone will discuss it more! Just discussing it isn’t enough to guide the design! If pipe resistance is not taken into account, the water seal height at location 1 should be less than 10 kPa. As for location 2, the water seal height should ensure that the hydrostatic pressure difference between the liquid level in B and that in A is exactly 10 KPa. These are my personal opinions; I haven’t done any detailed calculations, so please correct me if there are any mistakes.
Thinking about it again, that’s not right! Is the sum of the differences between level 1 and level 2, and between that and level 300, equal to 10 kPa?