The issue of stabilizing the pressure of the process nitrogen supply
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I have a question for the experts in HaiChuan process piping. When working on processes or piping installations, we sometimes encounter scenarios where nitrogen is used for long-distance transportation, with nitrogen pressure stabilization tanks being employed in this process. From the user’s perspective, placing a pressure stabilizing tank near each user can ensure relatively stable pressure and flow of the gas supply to that user. However, if considered on a plant-wide scale, such an arrangement results in too high costs. So, is it possible to locate it at a location where the gas source is farther away, perhaps near the point where the maximum gas consumption occurs? Is it normal or acceptable for the gas in the pressure stabilizing tank to flow back when there is a sudden leak in the pipeline or when another user with high flow rate comes online? I know that many systems have check valves installed in the gas supply direction of the nitrogen tanks, but this prevents the system from being stabilized when faced with the aforementioned problems. Thank you, Shutong Database
When transporting nitrogen over long distances, it is indeed necessary to maintain a stable pressure and flow rate. In this case, using a pressure stabilizing tank is a viable solution. Placing a pressure stabilizing tank near the user site can indeed ensure stable pressure and flow, but it is costly. If cost savings are a concern, installing a pressure stabilizing tank at some intermediate point along the pipeline, especially near the point of highest gas consumption, is also an option. This can provide stable pressure for subsequent users. Regarding the issue of possible gas backflow, if gas does backflow, it may be due to a design flaw or an accidental situation. The proper operation of a pressure stabilizing tank relies on pressure differences to maintain the flow of gas to the user side. Therefore, if there is a large amount of leakage or new high-flow users cause a pressure drop, the gas in the pressure regulator tank may flow back. This is usually not a normal phenomenon, as these possible situations should be taken into account when designing the pressure stabilizing tanks and piping systems. Check valves are used to prevent gas from flowing back toward the gas source in the event of a system shutdown or abnormal pressure, thereby ensuring the safety and stability of the system. During design, a check valve can be installed between the pressure stabilizing tank and the user side, depending on actual needs and safety requirements. In practical operation, the design of the system requires taking into account factors such as the amount of gas used, the length of the pipelines, pressure losses, potential leakage issues, and changes in user requirements, in order to ultimately create a system layout that is both economical and safe. Engineers typically apply the principles of fluid mechanics and piping engineering, along with practical experience, to determine the optimal methods for nitrogen delivery and pressure stabilization. .
Your question requires taking into account the gas usage characteristics of each unit. When setting up the overall gas storage tank, it is necessary to consider improving pressure transmission, which can relatively reduce transmission resistance losses. It is necessary to install check valves, as some units also need to prevent the backflow of materials. Taking into account the design considerations of all user units, this should not be a problem. For reference.