Seeking guidance on the design standards for cofferdams for acidic water tanks
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Gentlemen, when experts from the Jiangsu Provincial Environmental Protection Department came to inspect our company, they said that the dike surrounding the acidic water tank in our facility was too low and did not meet the standards. I would like to ask fellow marine engineers: does anyone have the design standards for acid water tank cofferdams? Could you share it!
This post was last edited by ylb913 on 2015-6-10 09:44. We have two sulfur-containing wastewater tanks, located within one cofferdam. We proceed by tearing open the bottom of each tank, taking into account the capacity of the cofferdam to hold this water, or ensuring that it can be quickly poured into other relevant systems.
It would be easy to say if the device had that much space. We have three tanks, with the largest one having a capacity of 3000 cubic meters; the other two have a capacity of 2000 cubic meters each. In total, this amounts to 7000 cubic meters. The cofferdam required for this would be extremely large, and our installation space is too limited to accommodate such a cofferdam. So it is necessary to look up the relevant standards!
With a construction volume of 3,000 cubic meters, and due to limited space, the height of the cofferdam can be increased appropriately to 2–2.5 meters.
2-2.5m, dear, your cofferdam meets the requirements, but it has now become a confined space as well! What is the height of an ordinary, normal person? Are you sure you’re not joking? I think it’s possible to set up cofferdams based on the rupture of a single tank; there’s no need for them to be very tall. If I’m not mistaken, the standards specify that the height of cofferdams should not exceed 1 meter.
Yes, the height of the cofferdam for our newly designed acidic water tank is 1 meter, but it should be constructed from concrete to prevent leaks.
But we have 4 large tanks with a capacity of 5,000 cubic meters each, while the total capacity of the cofferdam is only over 3,300 cubic meters – it’s not enough to hold them all. This is based on the assumption that only 1 tank is leaking, without deducting the volume occupied by the other 3 tanks that are not leaking.