In the chemical and petrochemical industries, distillation columns are common separation equipment used to separate components of a mixture according to boiling point or vapor pressure differences. The efficient operation of the distillation column depends on the precise control of the liquid level in the column, and the accuracy of the level measurement directly affects the product quality and production efficiency. In this paper, we will discuss the application of guided waveradar level meter in the level measurement of distillation tower and its advantages.

Guided wave radar level meter is a kind of liquid level measurement instrument based on the principle of time domain reflection. It works by transmitting electromagnetic pulses that propagate along the probe cable or rod. When encountering the surface of the measured medium, part of the pulses are reflected to form an echo and return to the pulse transmitting device along the same path. By calculating the time difference between the transmitted pulse and the received echo, the liquid level height can be derived. This measurement method is characterized by high accuracy and reliability, and is not affected by medium changes, temperature, inert gas, steam, dust, foam and other factors. The advantages of guided wave radar level meter in distillation tower level measurement include

1. high accuracy: guided wave radar level meter has high measurement accuracy, which can meet the strict requirements of the distillation tower on the level control. 2. high reliability: because of its measurement principle does not depend on the physical properties of the medium, so even in the high temperature, high pressure, strong corrosion and other harsh environments can maintain a stable measurement performance. 3. anti-adhesion ability: in the distillation tower, the material is often high viscosity and volatility, and is easy to Adhesion phenomenon. Guided wave radar level meter adopts single rod measuring probe with anti-adhesion design, which can effectively reduce the impact of adhesion on the measurement.4. Strong adaptability: guided wave radar level meter can be used to measure a variety of liquid media, including corrosive liquids, viscous liquids, etc., and it is suitable for a variety of types of containers and working conditions.

Take the deethanization tower of a chemical plant as an example, the operating temperature of the tower is as high as 260~400℃, the pressure range is +0.5~3bar, and the medium is a mixture of light hydrocarbons. In this working condition, the traditional liquid level measurement instrumentation is often difficult to meet the requirements. After adopting guided wave radar level meter, it has successfully solved the problems of high temperature, high pressure and adhesion, and realized stable and reliable liquid level measurement. At the same time, the level meter also has a complete diagnostic function, which can detect and deal with potential faults in a timely manner, improving the operational safety and reliability of the equipment.

Guided wave radar level meter has significant advantages and application value in distillation tower level measurement. Its high accuracy, high reliability, strong adhesion resistance, low maintenance requirements and adaptability make it an ideal choice for distillation tower level control.