Boiler drum liquid level measurement, how effective are your various methods?
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There are many measurement methods for boiler drum liquid level measurement. I wonder which method everyone uses and how good the measurement results are.
Electric contact level gauge, two-color level gauge, dual-chamber balancing vessel, differential pressure transmitter, and guided wave radar all have pretty good effects.
For boiler drum liquid level measurement, K-TEK's magnetic flap + magnetostriction is a very good solution, and its technical indicators of high temperature and high pressure resistance are particularly suitable for this working condition.
This problem is very annoying. There will be many problems in the actual production process of the air bag water level control, such as: false water level. This has always been annoying enough. From a control point of view, the three-impulse scheme was generally used in production control in the past. As far as I know (mainly from information and papers), the general control effect is not very good. It does not mean that it can be solved by using that meter. The fundamental solution to the control of the air bag water level must be solved through the control scheme. Theoretically, from the perspective of the current thesis, it mainly uses predictive control solutions, but it is difficult to implement in production. I don’t know why. It may be due to cost and actual co-conditions. This is the difference between theory and practice. This reminds me of what an engineer said: No matter what technology some professors in the school have filled the domestic gap in a field, this thing cannot be brought into production. It can only stay on paper. And abroad starts from actual production.
That will produce false liquid levels. It is recommended to use a density compensation method to measure the liquid level. Use two differential pressure liquid level transmitters, one to measure the liquid level and one to measure the density. The one that measures the density should be kept high and low and always covered by liquid. This post was last written by tang * Edited by udong on 2008-1-30 12:52 ]
We are using electrical contacts and differential voltage
It depends on the pressure\temperature of your steam drum. Generally speaking, if you don't need too much accuracy, just use a magnetic flap level gauge.
We use three types of sensors in air bag liquid level measurement: radar, differential pressure, and magnetostriction. Radar sometimes has jumping signals. Since there is no density compensation for differential pressure, the measured value is very different from other measurements. Magnetostriction is relatively stable.
Boilers seem to use float level gauges for indication, which means that since they are all external level gauges and have glass level gauges to assist judgment, there is no problem in use.
Displacement level gauges and differential pressure level gauges with dual-chamber balancing vessels can be used.
What we use here is a double-chamber balance container + TV monitoring glass plate level gauge, which has better results.
Electric contact level meter, two-color level meter, two-chamber balance container, differential pressure transmitter
We use a double chamber balancing vessel differential pressure transmitter
We use the method of dual-chamber balancing vessel differential pressure transmitter + float level gauge, and the effect is very good! ! ! ! !
On the spot: Two-color water level gauge with remote rotation: Balance container + differential change
It’s the same as mine, haha!
We also use a dual chamber balancing vessel differential pressure transmitter
Balance container + differential pressure transmitter, float level gauge.