According to different materials, chemical storage tanks are generally divided into three categories, namely: metal storage tanks, non-metal storage tanks, and metal and non-metal composite storage tanks. Due to the large volume of these chemical storage tanks, some chemical storage tanks still need to be placed outdoors all year round. Therefore, the liquid level measuring instruments installed in the chemical storage tanks must have quality characteristics such as high accuracy and strong reliability. At present, the most commonly used level measuring instruments used in chemical storage tanks include float level gauges, magnetic flap level gauges, ultrasonic level gauges, radar level gauges, and so on. According to different measurement principles, methods and characteristics of working conditions, each measuring instrument has its own advantages and scope of application. Today, we will focus on the application of radar level gauges in large chemical storage tanks.
First of all, in order to better understand the application of radar level gauges in large chemical storage tanks, let's first understand the measurement principle of radar level gauges.
The working principle of radar level gauge is very simple, usually there are three steps: launch, reflect and receive. Based on the design principle of the high-frequency waveguide, the microwave pulse of the radar level gauge emits electromagnetic wave signals from the end of the antenna through the PTFE emitter. The transmitted wave will be reflected on the surface of the material to be measured, and the reflected echo signal is still received by the antenna. Through the principle of time expansion technology, the time interval between the transmitted pulse and the received pulse can be accurately calculated, so as to further calculate the distance between the antenna and the surface of the measured medium.
In practical applications, especially in the case of more complicated working conditions, the existence of false echoes has a great possibility. In order to avoid false echoes, the Rada-21 high-frequency pulse radar level gauge uses an automatic false echo suppression function, which can intelligently eliminate fixed interference and accurately identify liquid level echoes.
Secondly, it is necessary to know the characteristics of the radar level gauge, that is, what advantages it has when applied to large chemical storage tanks.
Generally speaking, radar level gauges have the following characteristics and advantages:
1. High accuracy
Because electromagnetic waves are not affected by the environment, and the radar level gauge does not have any contact with the storage tank or medium, the radar level gauge can still measure quickly and accurately even under severe conditions.
2. Wide range of tested liquid medium
Microwave signals are similar to visible light and have good penetrability. Its reflected power depends on the conductivity and dielectric constant of the measured medium. The larger the dielectric constant, the better the reflection effect of the echo signal, so the chemical properties are different. For liquid media, such as toxic media, corrosive media and other liquid and slurry media, the radar level gauge can be well qualified for measurement.
3. Safe and energy saving
Because the microwave emission power of the radar is small and can be electrostatically shielded by the outer wall of the metal container, the application of the radar level gauge is less restricted by the site and is harmless to the human body.
4. Wide application range
According to the shape of the tank, the radar level gauge can measure the liquid level of spherical tanks, horizontal tanks, cylindrical tanks, cylindrical cones, etc.; according to the function of the tank, it can measure the liquid level of storage tanks, buffer tanks, The liquid level in the microwave tube and the bypass tube is measured.
From the working principle and product characteristics of the above-mentioned radar level gauge, it is not difficult to see that its application advantages in large chemical storage tanks are very obvious. Next, let's take a look at how the three radar level gauges with cone antennas, parabolic antennas and rod antennas are used in large chemical storage tanks.
1. The radar level gauge with cone antenna is suitable for chemical storage tanks with a large measurement range. It is recommended to install it on the top of the tank or install a wave guide.
2. The radar level gauge with parabolic antenna is suitable for liquid and solid measurement applications. Because of its narrow radar beam, it can be applied to a large range of chemical storage tanks. In addition, the radar level gauge of the parabolic antenna can also be used in working conditions where there is a bonding fluid such as asphalt and liquid sulfur.
3. The radar level gauge with rod antenna antenna is small in size, suitable for measurement applications with sanitary requirements or corrosive chemical materials.
Because the radar level gauge not only meets the requirements of high measurement accuracy and automation, but also ensures a certain degree of measurement repeatability and stability, laying a good foundation for the efficient operation of factories and workshops, and is suitable for large chemical storage tanks. As far as the liquid level measurement is concerned, the radar level gauge is the best choice.
The above is the relevant introduction of "Application of Radar Level Gauge in Large Chemical Storage Tanks". I hope it will be helpful to the instrument counterparts. For example, if you want to know more about level switches (level switches, level switches), level meters (Level gauge, level gauge) and other level measuring instruments, welcome to log on to the official website of Jiweimeter or follow the WeChat public account: Jiweimeter to view. (The article is excerpted from:, please indicate the source for reprinting.)
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