How do float interface level gauges reduce the impact of density changes on the displayed level
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There is a crude oil three-phase testing separator that uses two float level gauges to measure the height of the oil-water interface. Due to the varying densities of each oil well, the density of water ranges from 1020 to 1220, while the density of oil varies between 769 and 810. When testing different oil wells, the difference between the float level gauge and the glass plate level gauge can be as much as +150 mm at times, or -170 mm at other times, which severely affects the proper operation of the separator. I would like to ask the experts here: is there any way to reduce the error in the interface level caused by changes in density?
It is necessary to go to the manufacturing plant to determine whether the selected float is suitable, and to decide whether to use an internal float or an external float; the external float will yield better results
“Is the density of water between 1020 and 1220? Can the density of water vary by as much as 200 kg/cm3? If the density of water could really change from 1000 to 1200, could it still be called water? Damn, how about an elephant? I, Grass Elephant, gave birth to a male lion at the zoo – can you believe it? Who among you believes it? Who will lend me a ladder to help me climb onto the elephant’s back? Hahaha......
What is an internal floating tank and what is an external floating tank?
It’s not pure water; it’s saline water with a very high salt content, which is why its density is high.
The last edit to this post was made by 1111111 on 2019-9-17 at 09:36. Large fluctuations in the density of \"saline-alkaline\" fluids violate the measurement principle of float level gauges; how can level measurements be accurate under such conditions? :lol
In essence, a float level gauge measures the liquid level by detecting density; it is unable to measure levels when there are changes in density.
There’s no good solution; change to another gauge – the float type isn’t suitable.
This post was last edited by 1111111 on 2019-9-20 at 13:06. Despite the severe instability in the density of the aqueous phase, as shown in the diagram above, by employing a workaround and carrying out density monitoring in two stages – one at the top and one at the bottom – in the drainage monitoring section (Section H), it is still possible to ensure 100% proper drainage! So, in terms of logical reasoning, how should one approach saline-alkaline water with severely unstable density? If anyone is interested in purchasing a table, please come and ask me.