Sealed sewage discharge for the storage tank or a sump to be installed?
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How is the tank drainage designed in current raw material tank areas or finished product tank areas? Conventionally, double valves are installed at the sewage outlets, and a sump is created on the ground for open discharge. The water supply and drainage team installs water seal wells outside the fire dike. With increasingly strict environmental regulations, is it necessary to implement a closed-discharge system and set up underground oil tanks? Additionally, is it necessary to make the sewage discharge from the tank area pumps part of a closed system? The tank areas I work on these days mostly use open-type waste discharge systems; for example, in the case of methanol tanks and methanol pumps. I’ve been quite puzzled about this, and I hope the experts here can offer some guidance
I’m here to learn *; please give me a lot of support
In 2013, I saw that in a gasoline and diesel storage area, the drainage from the storage tanks was handled by using double valves at the drainage outlets; from there, pipelines led to the fire dike, and from there to underground oil storage tanks located in the storage area where the oil was processed.
Currently, environmental regulations require that sewage pipes undergo a water tightness test; most buried pipes cannot be made completely leak-free. Our reservoir area adopts an open-pipe layout, with connection ports installed in the area. When the storage tank needs to be cleaned, a mobile pump is used to pump the wastewater into open pipes, which lead to the wastewater collection tank.
Conventional sump well designs not only fall short in terms of environmental requirements but also pose safety risks due to the accumulation of oil and gas.
In our reservoir area, it’s diesel and heavy oil; both are lighter than water. They are all connected to the oil-water separation tank through open pipes, with the water being drained away and the oil remaining
I recommend that companies with the necessary resources install closed-system dehydration facilities. I have comparisons available; in terms of both the working conditions on site and occupational health, such facilities are much better than designs that involve burying oily wastewater underground. The initial investment for these facilities is acceptable, but what’s important is whether there is a proper system for handling the gas phase; otherwise, the investment will still be high.