Installation method for liquid ammonia horizontal tank level gauge
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In addition to the common spherical tanks, horizontal tanks are also used in chemical plants for storing liquid ammonia. The diagram below shows how an external level gauge is installed on a horizontal tank for storing liquid ammonia. It should be noted that in some horizontal tanks on site, the liquid ammonia level must not exceed half of the tank’s capacity; under such conditions, the calibration probes located on the sides cannot function properly. In such cases, an external level gauge is activated automatically, and temperature calibration is used to ensure the accuracy of measurements taken by this external level gauge.
What are the advantages and disadvantages of ultrasonic level gauges installed on the top and bottom of tanks? Please explain, OP~~ Hehe~~
In some horizontal storage tanks, the liquid ammonia level must not exceed half of the tank’s capacity; under such conditions, the calibration probes located on the sides cannot function properly. In these cases, an external level gauge is activated automatically, and temperature calibration is used to ensure the accuracy of measurements taken by this external level gauge. I don’t understand the description above – does it mean that the liquid level cannot exceed this upper probe? Must the liquid level still not be lower than this upper probe? ? With such restrictions, do you think it can be implemented on-site? Why can’t this upper probe be installed on the top of the horizontal tank? ? How is temperature calibration used to ensure the measurement accuracy of the external level gauge? ? What is temperature calibration? Does the environment have an impact on it? ? Additionally, I would like to ask: if the pipe wall becomes corroded and thinner, or is uneven, or if the medium deposits dirt on it causing the wall to thicken, can this level gauge still function properly? Can the level gauge detect changes in the wall thickness of this tube? ? The measurement probe is installed at the bottom of the horizontal tank. How can we ensure that contamination in the medium inside the tank does not affect the measurements, and how can we prevent impurities and moisture present in the medium from impacting the measurements? ?
What principle is at work here? Is it radar?
Top-mounted ultrasonic level gauges require an opening at the top, and the atomization phenomenon above the medium can easily affect them. The sonar waves used by the external level gauge at the bottom of the tank are different from ultrasonic waves; their frequency is much higher. Moreover, installation requires no drilling, no shutdown of operations, and no use of fire.
This uses the principle of sonar wave ranging; it’s completely different from radar! The installation method is also different.
Are the so-called ultrasonic level gauges available on the market actually ultrasonic waves or sound waves? ~~Could you please explain this~~ Hehe~~