How is the annual output of an intermittent production facility calculated?
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How is the annual output of an intermittent production facility calculated? What are the differences between reaction vessels for batch production and those for continuous production?
Intermittent production can be calculated based on the production cycle, the capacity of each reactor, and the number of reactors.
If one batch in a reactor takes 3 days (including material addition, processing, and reactor cleaning) to produce 100 kg, then with 300 days per year, the production capacity is 10 tons per year； Continuous operation refers to establishing a flow process within the reactor, with continuous feeding and discharging of materials into and out of the reactor. There is no significant difference in terms of structure; the difference lies in the fact that continuous processes generally offer higher efficiency in heat and mass transfer compared to intermittent processes
Do I need to wash the tank for each batch of material? Isn’t it necessary? Should we only calculate the feeding time and reaction time? How long should the feeding time be? Half an hour should be sufficient, right? For example, in a process where raw materials pass through two reaction vessels in sequence to produce a product, it is necessary to ensure that the processing time in the second reaction vessel is equal to that in the first reaction vessel, right? Otherwise, the material in the first reactor has already completed its reaction process, while that in the second reactor hasn’t; thus, the material from the first reactor cannot proceed to the next stage, which only results in a loss of time
What does the production cycle refer to? Could you give a specific calculation example?
The structures of reaction vessels for continuous production and batch production are different, right? Mixers like this can’t be used for continuous production, right? The material goes into the tank but hasn’t been mixed yet before it’s discharged again?
Because these are related to the size and specifications of the equipment – what size should the equipment be? What size should the reactors, tanks, pumps, and dryers be? And how should these pumps, reactors, tanks, and machines be coordinated with each other?
Are there any standards, specifications, or books and manuals that can be referred to?
For the entire period from the start of feeding, through the reaction, to the end of discharging, please refer to professional books.
Have you heard of the residence time distribution? It is recommended to consult relevant books for learning; in continuous production, multiple reactors are often connected in series. I have also come across horizontal mixing equipment with partitions inside, which essentially functions as multiple reactors connected in series as well
What you mentioned relates to process design issues, which include cost calculations, selection of appropriate components, and so on; it’s best to engage a professional design firm for this task.