What type of level gauge is suitable for measuring 98% sulfuric acid?
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The sulfuric acid tanks in our factory require level measurement; the acid consists of 98% concentration. The tank walls are protected with acid-resistant bricks, so it’s not possible to install flanges on the sides. There is a drain outlet at the bottom, and a spare flange at the top. The radar level gauge that was used before caused problems due to the swirls that occur on the surface once the pump starts operating, as well as the layer of foam on the surface of the sulfuric acid, which greatly affected the accuracy of measurements. May I ask experts what is the best type of level gauge for such conditions?
Should a float ball work? Should magnetostriction work too?
This post was last edited by qugd on 2015-12-9 at 22:34. If the temperature of the sulfuric acid is not high, an immersion level gauge made of acid-resistant stainless steel can be considered. Additionally, the air-blown level gauges commonly used in the sulfuric acid industry in the past are a good choice; although their accuracy is not high, they are durable. These two types of level measurement require few specifications regarding the condition of the liquid surface, and there are basically no installation issues. http://f.hiphotos.baidu.com/baike/c0%3Dbaike92%2C5%2C5%2C92%2C30/sign=b0e50def4c540923be646b2cf331ba6c/f703738da97739128e4f76adfd198618377ae295.jpg This shows the basic principle of a pneumatic level gauge; aside from the exhaust pipe on the high-pressure side which is in contact with the medium, all other components that are not in contact with the medium make maintenance and operation much simpler.
Our factory uses float level gauges, but they are difficult to maintain
An anti-corrosive immersion level gauge can be used when the temperature is not too high
Radio frequency admittance and magnetostriction can be considered
The automatic acid concentration meter from Nanhua Research Institute is quite good
Our company uses single-flange level gauges. .
Personally, I think a guided wave radar should work for the conditions described by the poster