Nitrogen flow rate and consumption, seeking advice on tank heating issues
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Good evening, everyone. I have just started working on the design of the tank area, and there are some basic questions I’m not sure about, so I’d like to ask for your help. 1. There are two benzene tanks in this tank area, equipped with hot water heating; there are two inlet and two outlet ports for hot water in front of the tanks. I want to know whether the heating water is supplied to both tanks at the same time, or one after the other? When supplying water, are two inlet pipelines used simultaneously? Or separately? 2. What is the typical gas flow rate in steam, nitrogen, and instrument air pipelines? I checked some standards; some state that for nitrogen purging, the flow rate should be above 20 M/S, while others suggest calculating it based on a maximum allowable pressure drop of 7 KPa per 100 meters. I’m completely confused. . . . Does this flow rate refer to the flow rate in utility pipelines such as those for nitrogen, or to the flow rate when nitrogen is used for purging in other pipelines? If calculated based on pressure drop, then the flow velocity is only around 5 m/s. For example, in a DN50 nitrogen pipeline used for purging, how should the nitrogen supply volume be calculated?
Neither of your two questions is a problem; it is recommended to consult the operating procedures to understand the process requirements and the principles behind the workflow. As a foundational book, reading \"Principles of Chemical Engineering\" can help with your learning and problem-solving.
No matter how much money you have, you can’t use nitrogen for purging; check the national standards regarding the design and construction specifications for industrial metal pipelines, and then outline these requirements
The issue of heating hot water in storage tanks depends on the heating requirements. Since the two tanks are in different states, it is undoubtedly necessary to set them up separately and supply heat as required. However, it seems unnecessary to provide heat tracing for benzene storage tanks. The flow rate of gas within the pipeline is determined fundamentally to meet flow requirements and achieve optimal investment returns. A high gas pressure can meet the requirements for pressure drop due to resistance, allowing for a higher flow rate; conversely, the flow rate can be set lower in order to determine the pipe diameter. The nitrogen purge flow rate and the nitrogen pipeline flow rate are two completely different concepts. The former is to meet the requirement of a thorough nitrogen purge, rather than based on the need to satisfy the supply flow rate.