How to choose the length-diameter ratio of a container?
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What is a reasonable length-to-diameter ratio for containers that helps save material and is also beneficial for the design of the agitator?
According to the textbook, it is specified to be 4-10, but in actual manufacturing, the value is chosen based on the medium flow rate, and it is generally on the lower side.
Generally, the length-diameter ratio is determined based on process requirements; the value of this ratio has little impact on material savings. Generally, high-voltage equipment tends to have a relatively large length-to-diameter ratio
As recommended by design experience and relevant standards.
What kind of container are fingers 4 to 10? How tall is the tower, approximately?
Vertical containers use the least material when following a 1:1 ratio, especially those at atmospheric pressure
If the container you design is equipped with an agitator, by specifying the diameter of the container, you can ask the agitator manufacturer to help determine the appropriate height. The mixing efficiency is calculated by the agitator manufacturer; it is necessary to provide information on the properties of the medium and the operational requirements. For ordinary containers, it is recommended to refer to the series dimensions specified in HG5-1571-1580 when making a selection.
The geometric dimensions of chemical processing equipment should be determined by process engineers, as it is necessary to meet the requirements of the process as well as the conditions of the installation site. If there are no restrictions on the site, then its volume must be known. Once the volume is known, the diameter can be determined by referring to existing equipment and relevant standards; thereafter, the length of the cylinder body can be fixed. You can refer to Volume 3 published by the Equipment Design Technology Center of the Ministry of Chemical Industry. Alternatively, if the container you are designing includes an agitator, you can consult Table 8-1 on page 141 of the comprehensive book on chemical processing equipment design: for solid-liquid or liquid-liquid mixtures, H/Di = 1–1.3; for gas-liquid mixtures, H/Di = 1–2; for fermentation tanks, H/Di = 1.7–2.5. If heat transfer is required, the diameter can be smaller, which facilitates heat transfer and also increases the heat transfer area. If heat transfer is not necessary, the diameter can be larger, allowing for a shorter agitator shaft.
For a container with an aspect ratio as high as eighteen, I wonder what the specific reasons for making such a choice are.
On the 8th floor, I downloaded the three volumes of the \"Standard Series for Chemical Equipment.\" Perhaps due to the large amount of content, I was unable to find what you mentioned regarding \"liquid-solid or liquid-liquid phase materials with H/Di=1~1.3.\" Could you tell me the exact page numbers?
The issue of the length-to-diameter ratio isn’t very clear, but I’ve encountered it when working on horizontal containers. If the length-to-diameter ratio is too high, a reinforcement ring must be added for the calculations to be valid.