5 For the pneumatic transport of starch, what should be the gas-solid ratio? What is the basis for the selection?
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This post was last edited by jintchinssen on 2011-7-19 09:31. Hello, esteemed colleagues – what should be the gas-solid ratio for the pneumatic conveying of starch? What is the basis for making this choice? Some say 0.5, while others say it should be small; I think it’s small in any case. May I ask what value would be appropriate?
There are no exact figures for pneumatic conveying; it is mainly based on practical applications. For your starch, using conventional pneumatic conveying with DN100 pipes, it takes 6 to 7 minutes to transport 1 ton of starch. Seek out a professional manufacturer specializing in powder conveying.
This also depends on the distance over which it is transmitted; there is no fixed ratio, and it’s best to have a professional manufacturer carry out the calculations
The solid-to-gas ratio is selected based on the material properties, transportation distance, and available pressure. Starch transportation is usually in a dilute phase, with rotary blowers being used for air supply; the solid-to-gas ratio can range from 2 to 10, and a lower value should be chosen for longer transportation distances.
When designing a pneumatic conveying system, the appropriate conveying method should be selected based on factors such as the properties of the material to be conveyed, the technical and economic requirements of the equipment, as well as the process characteristics and requirements of the production process. It is recommended to refer to HG/T 20570.7 Calculation of pipeline pressure drop – 5 Gas-solid two-phase flow
The \"Chemical Process Design Manual\" published by Shanghai Pharmaceutical Design Institute includes examples of pneumatic conveying, along with information on the selection of the material-to-gas ratio.
It’s better to choose a smaller one; higher energy consumption is the worst that can happen. If it’s chosen too large, the pipes will get clogged or the flow won’t be possible, and that will cause problems. :lol