What is the standard spacing between the jacket and the cylinder of chemical processing equipment?
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There is no strictly defined standard spacing between the jacket and the cylinder of chemical processing equipment; it usually needs to be determined based on factors such as specific process requirements, heat transfer needs, properties of the medium, and the size of the vessel. The typical value ranges from 25 to 80 mm, with 40–50 mm being the preferred range. The \"Design Code for Mixing Equipment\" (HG/T 20569) recommends that the gap between the jacket and the reactor vessel should be set at 1% to 3% of the vessel’s diameter (for example, 10–30 mm for a diameter of 1 m). The above information was provided by Doubao; however, no recommended values are specified in the relevant standards. Therefore, I would like to ask everyone: how is the distance between the jacket and the vessel determined? Is it usually based on empirical values?
Excerpt from the Comprehensive Book on Chemical Equipment Design: Mixing Equipment
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Indeed, current domestic standards and specifications do not provide strict and explicit numerical requirements for the distance between the jacket and the cylinder. In actual engineering design, empirical values or recommended parameters are generally used as a reference, with the final decision being made based on the following factors: 1. Process requirements and heat transfer efficiency. Jacketing is primarily used for heat exchange; if the gap between the jacket layers is too large, the flow rate decreases and the heat transfer efficiency drops ； If the jacket gap is too small, the flow resistance increases, which hinders the circulation of the medium and also raises the difficulty of processing. In practical experience, a range of 25–80 mm is generally chosen, with the 40–50 mm range being commonly used. 2. Equipment size (diameter): For smaller equipment (diameter
Same question: which standards and which clauses need to be checked?
It should be conducive to manufacturing. Avoid non-standard sizes whenever possible.
In terms of the process, it is necessary to consider the total heat transfer amount, the total flow rate of the jacket fluid, as well as the flow velocities at the inlet and outlet; the flow velocity inside the jacket must also remain within reasonable limits； In terms of manufacturing, it is also necessary to consider ease of production. The screenshot from the 2nd floor is the correct one.