Which flow meter is suitable for measuring the flow rate of high-temperature concentrated sulfuric acid?
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For 99% concentrated sulfuric acid at 190 degrees, what type of flow meter is suitable for measuring its flow rate? Please recommend one. Thank you. The pipes are made of 310 material; since it’s a corrosive medium, I thought of using a diaphragm, but the diaphragm cannot withstand such high temperatures. Using pressure transfer tubes to carry the fluid away from the high-temperature area is an option, but I’m not sure how to address the corrosion issue. Is it possible to use pressure transfer tubes and then install a flange with a diaphragm?
An ultrasonic flow meter can be used, as it does not come into contact with the medium.
High-temperature resistant ultrasonic flowmeters have low requirements regarding the material of the pipeline; PVC and fiberglass are both suitable. Our company uses Siemens 1011 series models sold by Shanghai Subotai, and they perform very well.
I wonder if anyone has used a pressure lead to connect to a diaphragm-flanged device? In that case, can a differential pressure transmitter with a diaphragm capillary be used?
Personally, I think it is possible to use a pressure lead to draw the pressure down, and then install a transmitter with a diaphragm. But transmitters with capillaries cannot be used; the flange with capillaries comes into contact with the medium first, so the temperature measurement is likely not accurate.
Based on measurement accuracy options: 1. Variable area flowmeters – not very accurate but inexpensive – the KROHNE Baffle plate flowmeter can be used; 2. Electromagnetic flowmeters should work as well, since 99% H2SO4 is conductive, right? 3. Mass flow meters have high precision, but they are expensive. Let’s all come up with ideas and share our choices along with the reasons behind them.
As mentioned above: 1. Electromagnetic methods definitely won’t work, as the temperature isn’t high enough. 2. Mass flow meters are simply not cost-effective I think ultrasonic ones should work
Ultrasonic flow measurement should work fine, but in my application there is also a pressure transmitter that is subject to high-temperature corrosion; I’m not sure if anyone has used pressure conduits to lead the pressure signal to a diaphragm pressure transmitter
1. Why isn’t the electromagnetic option suitable? If the temperature is too high, a split-type design can be used; the key issues are the electrodes and the lining. 2. Mass flow meters are not cost-effective. 3. Ultrasonic options should work well and represent a good choice as well