Seek advice on the size design of gas buffer tanks in pneumatic conveying systems
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I would like to ask everyone: When using nitrogen to transport coal powder at a flow rate of 3000 Nm3/h, what duration of buffer capacity should be taken into account when designing the gas buffer tank?； Are there any relevant regulatory requirements? Regarding the buffer capacity of the instrument air storage tank, I checked the relevant standards; according to HGT 20510-2014, the Design Code for Instrument Air Supply, the buffer time is specified as 15–20 minutes ； According to SH/T 3020-2013 \"Design Specifications for Gas Supply in Petrochemical Instruments\", the buffer time is specified as 15–30 minutes ； Which standard does the buffer tank in the pneumatic conveying system follow? Thank you!
Additional note: SH/T 3152-2007, \"Technical Specifications for Pneumatic Conveying of Powder and Granular Products in the Petrochemical Industry,\" also does not specify a buffer time for gas storage tanks. Could you please advise?
Generally, the volume of the buffer tank should be set at 10–15% of the gas consumption per minute; the larger it is, the better, although this increases costs. However, if a detailed calculation is required, it becomes more complicated as factors such as the air supply volume of the air compressor, operating pressure, and the operating mode of the pneumatic conveying device must be taken into account.