How is the medium in this process measured?
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At the outlet of the disinfection channel in the wastewater treatment plant, the medium used is ferric chloride. The customer chose an electromagnetic flowmeter for this purpose. I need to check: ferric chloride is highly corrosive when it reacts with water. What is the typical concentration of ferric chloride used in wastewater treatment plants? Since the customer is an intermediary, I can only turn to experts for answers. Can titanium electrodes or tantalum electrodes be used in electromagnetic flowmeters? The selection guide leaves the option for tantalum electrodes blank. Titanium electrodes can be used; they’re not the best option, but platinum electrodes are too expensive. Moreover, the delivery time is too long
Our company specializes in the production of electromagnetic flowmeters, and we have provided support to environmental protection engineering companies for a long time, boasting extensive experience in their use.
The last edit to this post was made by 1111111 on 2017-10-20 at 18:03. 1. “Disinfection channel” – since it’s a channel and not a pipe, do you have any way to ensure that the channel remains completely full? , or it’s half full, but the liquid level remains a constant value – is there any way to do that? 2. If not, then what if you use an electromagnetic method? How can you accurately measure the flow rate in that case? 3. I think you should use a (throttle groove + level gauge), that is, an open-channel flow meter, which would be the right choice. . . .
If someone asks a technical question, you who just bought a watch, please stop complaining, okay?
Electromagnetic flowmeters are installed in pipelines; how was the pipeline flowmeter installed in your channel? Ferric chloride solutions cannot use stainless steel electrodes, but Hastelloy or titanium electrodes can be used. It is also possible to use a capacitive electromagnetic flowmeter; such flowmeters do not have liquid-contacting electrodes and rely on inductive measurement, offering the same accuracy as conventional electromagnetic flowmeters.
Send the parameters of the wastewater to the manufacturer so that they can make a choice. There’s no need to worry about it yourself.
First of all, the tantalum electrode is definitely fine. Secondly, is this outlet a round tube? Full pipe? This needs to be considered; if that’s not possible, use a open channel, and then there’s no need to worry about the material.