How to effectively prevent false liquid level readings in various towers
Thread Content
For the four-nozzle gasification system (the towers that are crucial for gasification, such as the water scrubbing tower, the hot water evaporation tower, and the cyclone separator), apart from installing additional level gauges, what effective methods can be used to prevent false readings of the liquid level? It has been found in practice that in many factories, due to years of operation, only one level gauge per tower is still functional. If even that last level gauge starts giving faulty readings, what other effective methods can operators on-site and those in the control room use to make judgments and take action? I hope experts can share their knowledge; I’m a beginner seeking guidance. I hope to learn the most practical methods, as I think these are problems we are likely to encounter once we start working formally.
Other than “redundancy,” there really isn’t any particularly good solution~~ Add a level switch? Actually, it’s similar to choosing between two or three options~~ Of course, it’s also possible to use flow meters to monitor incoming and outgoing flows~~ but that seems more complicated~~ Additionally, it depends on an individual’s skill in operation; for example, judging the true level by checking the opening degree of the inlet and outlet valves~~
1. The scrubber tower is equipped with two remote-mounted level gauges of different types (some including buffer tanks), as well as an on-site magnetic flap level gauge, which can be used to cross-verify each other. 2. How to determine it? By looking at the water balance. 3. For each problem that arises, there is a corresponding solution; some involve replenishing moisture, while others involve reducing drainage, etc
Do you mean that the valve opening degree and the corresponding flow rate value are not the same?
I wonder if, by observing the flow rate, blockages in the pipelines could cause fluctuations in the flow, thereby interfering with accurate judgment? Is it possible to make a more intuitive judgment by changing the level of pressure or pressure difference?
1. Important equipment must be equipped with three level gauges, which should be connected from different pressure tapping points. 2. From practical experience, local magnetic flip valves are practically useless due to frequent clogging.
1- The level gauge should be flushed regularly. 2- The water quality in the system needs to be controlled properly; if scaling forms at the pressure-taking port of the level gauge, it will be difficult to clean it away using the flushing water for the level gauge. 3- Coal quality is also crucial; avoid using coal with high calcium content.
Three level gauges are required! It cannot be operated without a level gauge
The measurement of remote liquid levels involves converting pressure differences; as for preventing inaccuracies, flushing water is generally used to avoid blockages