Install an automatic dripping device in the kettle
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When adding phosphorus trichloride, it is necessary to control the temperature, the time taken, as well as the rate of addition over a fixed period of time. What equipment can be used to achieve this?
What about the metering pump? In the field of fine chemicals, those involved in pesticide or pharmaceutical production use substances that are added in a dropwise manner, and metering pumps can be used for this purpose.
Only a metering pump can achieve your goal of precise dosing
I’m not very familiar with metering pumps. Control valves can be used to regulate the opening degree and thus control the feed rate, but high demands are placed on such valves; some manufacturers’ control valves do not achieve such a high level of precision!
Does this metering pump work with a PLC? There are too many conditions that need to be controlled. . Thank you all for your support. Are there any brand recommendations?
For the addition of phosphorus trichloride, we use a metering tank along with a control valve; the metering tank is equipped with a weighing module. To achieve accurate measurement, it is recommended to use a mass flow meter, a control valve, and a shut-off valve.
The whole set might be a bit expensive
For electric metering pumps, adding a frequency converter is a good idea; if you’re concerned, include a mass flow meter as well. This setup works very well – the frequency converter controls the flow rate while the mass flow meter verifies it. If the requirements aren’t too high, calibrating the pump once will allow it to function properly for a long time without issues. However, explosion-proof metering pumps are hard to find. Using a mass flow meter together with a control valve makes it difficult to achieve accurate measurement
It’s not that we lack money that much; just clarify your requirements, and I’ll prepare a table for software development for you. Let’s get started. . .