Can I ask you guys what sort of system normally used for batching purposes. I am working on a system where I have to pump a certain amount of aqueous Ammonia in a mixing tank. it's a batch process.

I suppose you should have a closed system to prevent escape of ammonia. You may either use a batch weighing system using load cell or by using level sensor. if you can be more specific, providing you with a precise answer may be easier.

It will depend on the quantities you require, the accuracy that you need, what you are pumping from and to, what you are trying to achieve etc. You could use a flow meter/mass flow meter to totalise what is added, or as Amitava suggests use weight gain or loss of weight.

We do a lot of batch process work in 50 to 500 gallon reactors and there is no single system that meets every need. I can say that a typical jacketed mixing tank system will have a feed line, a dip tube for sampling, a bottom valve for draining and a vent line that passes through a condenser. Depending on your feed rate you can go with a weight differential for quick additions or if you need to meter it in check out 'micro motion' for flow meters. We typically like to use either gear or FMI pumps. Best of luck.

dear atif can you give us more details.

Thanks All, The system I need is to prepare a batch of 256Kg (1.46% AgNO3 and 6.12% NH3, and the rest is water) . This batch is required every hour, Aq. NH3 and AgNO3 needs to be pumped into the mixing tank for this purpose I need to design a system that can provide an arrangement to prepare the batch. for Aqueos Ammonia I also need what sort of Pipe materials are useablse.
For batching purpose we are planning to use a coriolis type flow meter. Thanks Atif

Typically ammonia passivates carbon steel, so that should not be an issue.

I would use metering pumps and flow meters to make sure the mix is consistent. Have one pump feed (by ratio) according to the flowrate of the higher volume component. If there is no significant heat of reaction you might be able to use motionless mixers.

256 kg/hr is a flowrate of about 4 l/min (do the math to make sure), and you can make a continuous system to deliver on demand. This is small scale stuff (the vessel would be on the order of 50 liters).

hello attif
it is better u use tank for mixing and stripping vessel on the top of the mixing tank, and in the stripping vessel u feed the water from top and ammonia from the bottom of stripping vessel, and this striping vessel output is feed to the mixing tank from top after you added the AgNH3, and use pump for
1-mixing tank circulation from the bottom of the mixing tank to the stripping vessel to the mixing tank again
2- take sample from discharge of the pump to analysis before drying and packaging.
3- from the discharge line of the pump from the bottom of mixing tank make t connection with valve to discharge the product of the batch

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@ Atif. Did you check the possibility of ejector?