Application of radar level gauge in chemical storage tank

According to different materials, storage tanks are generally divided into three categories: metal storage tanks, non-metallic storage tanks, and composite storage tanks. At present, the most commonly used liquid level measuring instruments in chemical storage tanks are float level gauges, magnetic flap level gauges, ultrasonic level gauges, externally attached ultrasonic level gauges and radar level gauges, etc. Each measuring instrument has its own scope of application. Let's discuss the application of radar level gauge in chemical storage tank. Measuring principle of radar level gauge The working principle of radar level gauge usually has three steps: transmitting, reflecting and receiving. Based on the design principle of high-frequency waveguide, the microwave pulse of the radar level gauge transmits electromagnetic wave signals from the end of the antenna through the PTFE emitter, and the transmitted wave will be reflected on the measured liquid surface, and the reflected echo signal is still received by the antenna. Calculate the time interval between the transmitted pulse and the received pulse, so as to further calculate the distance from the antenna to the measured liquid meter. In the case of complex working conditions, the existence of false echoes has a great possibility. In order to avoid false echoes, the popular high-frequency pulse radar liquid level gauge adopts the false echo suppression function, which can intelligently eliminate fixed interference and accurately identify liquid level echoes. The radar level gauge has the following and advantages: 1. High accuracy Since the electromagnetic wave is not affected by the environment, and the radar level gauge has no contact with the storage tank and the medium, the radar level gauge can still quickly, Measure precisely. 2. The measured liquid medium has a wide range. The microwave signal is similar to visible light and has good penetrability. The 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. The better, so for liquid media with different chemical properties, such as toxic media, corrosive media and other liquid and slurry media, the radar level gauge can be well qualified for the measurement work. 3. Safety and energy saving Because the microwave transmission power of the radar is small, it can be electrostatically shielded by the outer wall of the metal container, so the application of the radar level gauge is less restricted by the site and 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, vertical tanks and other tank shapes; according to the function of the tank, it can be used for storage tanks, buffer tanks , microwave tube, the liquid level in the bypass tube to measure. The following analyzes the application of three types of radar level gauges with cone antenna, parabolic antenna and rod antenna in 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 on the still-pipe. 2. The radar level gauge with parabolic antenna is suitable for the measurement of liquids and solids. Because of its narrow radar beam, it can be used in large-scale chemical storage tanks. In addition, the radar level gauge of the parabolic antenna can also be used in the presence of binding liquids, such as asphalt and liquid sulfur. 3. The radar level gauge with rod antenna antenna is small in size and suitable for measurement applications with hygienic requirements or corrosive chemical materials.
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