Drum level measurement
Thread Content
What is a good method for measuring the liquid level in a steam drum these days? And the calculation method for the measurements; thank you for your guidance~~~:) :) :)
We use a two-chamber balance container along with an intelligent differential pressure transmitter for measurement, and the results are quite good. The calculation of the measurement range depends mainly on the height that needs to be measured; in addition, it’s important to take into account the density of water.
Our factory uses intelligent differential pressure transmitters, which offer good measurement accuracy and performance.
Use floats and double-flange transmitters; be sure to choose more than two types of level gauges
We use a dual-flange smart differential pressure transmitter (with a capillary) for measurement; the parameters are read using a 375 handheld controller. As for bubble migration, the method is as follows: the value of URV obtained indicates the lower limit of the liquid level (LRV), with URV = height * density + LRV.
Dual-balanced container with differential pressure transmitter, as well as a two-color level gauge
The intelligent capacitive drum level gauge has a simple principle – it does not result in false level readings, which is something worth considering
We plan to use Croni floaters for measurements, but we’ve heard that these floats can get stuck or fall after being used for a while, which obviously is not good for taking accurate measurements. Has anyone used floats to measure the liquid level in steam drums? How can such incidents be prevented during use?
Electrocontact level gauges are also a very good option; most of them make use of industrial cameras to monitor the level indicated by the dual-color glass plate level gauge
The measurement using a two-chamber balance vessel along with an intelligent differential pressure transmitter is the most commonly used method at present, but its accuracy is not very high. An intelligent capacitive drum level gauge is a good option, yet it comes at a high cost
Buoyants are rarely used on pressure vessels; mechanical instruments pose risks to production safety. If large investments are not desired, differential pressure types can be used instead
There are many methods for measuring the drum liquid level, and the key lies in the differences in operating conditions. Dual-balanced containers, combined with intelligent differential pressure transmitters and multi-point electric contact level gauges for remote monitoring, are widely used in high-pressure steam generation boilers.
Does the two-color water level gauge have any power supply requirements?
Our company uses glass tube level gauges and electrode point level gauges. In good condition.
On the boiler drum, a magnetic flap combined with magnetostrictive technology can be used; the magnetostrictive element is placed outside the magnetic flap, allowing for both on-site display and remote transmission, which is quite good. It can also reduce the number of openings and the two stop valves! The key is to find magnetic flap devices that can withstand high temperatures, as well as the KM26+AT200 from KTEK – there are specialized solutions for boiler drum applications! KM26 can withstand temperatures of 538°C, while AT200 can withstand 427°C; the temperature range is more than sufficient!
Intelligent differential pressure transmitters, electric float level gauges, and magnetostrictive level gauges are used to measure the remote transmission signals； Local measurement is carried out using magnetic flap level gauges and glass plate level gauges.