Tank farm water injection system
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The water injection system for the tank area shares the same pump as the fire pump; however, the pressure from the fire pump is too low at the moment. What about pipeline pumps?
This question seems a bit general. This is because it depends on the functions of the water injection system, as well as whether the pressure and flow requirements for fire-fighting water are consistent with those specified for the water injection system; only after that can relevant issues be discussed. For reference.
It depends on how the injection pump is used. In my case, the injection pump is used for spherical tanks; it has a DN100 outlet. The pipes for fire pumps are generally quite large, right? I’m a beginner; please don’t criticize me, experts
What does a water injection pump mean? Fill the storage tank with water? Or tank spraying?
The water injection system for the propylene tank farm serves as a safety feature; it supplies water into the spherical tanks in the event of a propylene leak, so that water is what leaks out. The pump in the water injection system is a fire-fighting pump; when the water injection system is in operation, it is found that the pressure is insufficient, and water cannot be pumped into the tank. The owners want to change their current situation. My idea is to add a pipeline pump to the water injection pipe to increase the pressure.
The steady-high-pressure fire pump is shared with the water injection system pump. It has been found that the pressure is too low, so the water cannot be forced into the tank.
This is likely a design issue; the water filling system for our tanks is divided into two parts: low-pressure tanks are filled directly with fire-fighting water, while high-pressure tanks have a separate water pumping unit. Another injection pump will do; we use centrifugal pumps. Pipeline pumps with the same head should be more expensive, so it’s worth comparing them. For reference only.
The problem you’re facing now is that the pressure is too low when using the fire pump and the injection pump; could it be that the power and head of these pumps are not sufficient? What if you replace them with other pumps? If the pressure in the main fire water pipeline is low, then you definitely need to look for other causes. As you suggested, adding a booster pump after the pump seems like a good option; moreover, an interlock system could be installed to enable delayed start or simultaneous start
In a previous project of ours, the fire protection experts disagreed with using fire water. . . How did you pass it? The basis is Article 8.5.1 of GB50160-2008 Code for Fire Protection Design of Petrochemical Enterprises (2018 edition), which states that the fire water supply system shall not be used for other purposes
The fire protection measures for the water injection mode are not specified; only that the sprinklers cannot be used is mentioned. If you add a pipeline pump now, aren’t you still using domestic water?
If this is the current situation, it should be a design issue. It is recommended that a design institute develop the relevant implementation plan and file it, as this matter falls under the scope of security inspections. There should be a complete set of design plans for emergency facilities; it cannot be solely based on the owner’s requests. Some jobs can be taken on, while others require following certain procedures. If a pipeline pump is to be used, the pressure is also limited by the flow rate, which seems not to be a good approach; for reference only.