As an indispensable equipment in chemical, pharmaceutical and food processing industries, the level monitoring of internal substances is crucial to ensure product quality and production safety. Traditional level measurement methods such as float type, pressure type, etc. in the application of stirred reactor there are many limitations, and the radar level meter with its non-contact measurement characteristics, in such occasions show a unique advantage.

Stirred reactor is usually used to carry out chemical reaction between liquid and liquid, liquid and solid or liquid and gas. It has the following characteristics: 1. complex structure: the stirred reactor is equipped with stirrers to promote the mixing and reaction of materials. 2. variable medium: the medium in the kettle may be due to the reaction process and the physical properties (such as viscosity, density) and chemical properties of the change. 3. harsh environment: the reaction process may be accompanied by high temperature, high pressure, corrosive media or foam generation. 4. real-time monitoring needs: in order to control the reaction condition The liquid level needs to be accurately monitored in real time. The radar level meter measures the distance by transmitting microwave signals and receiving their reflected waves. When the microwave signal meets the surface of the medium, it will be reflected, and the meter calculates the liquid level height according to the time difference between the transmitted and received signals. Advantages include: 1. non-contact measurement, not affected by changes in the characteristics of the medium. 2. high accuracy and repeatability, suitable for precision measurement needs. 3. high temperature and high pressure resistance, suitable for harsh working conditions. 4. easy installation and maintenance, does not affect the reaction process in the kettle.

During a polymerization reaction in a chemical plant, the level of a stirred reactor containing a variety of solvents and catalysts needs to be monitored. The reactor has a diameter of 3 meters and a height of 5 meters, with an internal temperature of 150°C and a pressure of 1 MPa at atmospheric pressure, accompanied by steam and foam. A radar level meter suitable for high-temperature and high-pressure environments was selected for installation. When installing, considering the influence of the stirrer, the meter was chosen to be installed in the center of the top of the reactor to avoid the interference of the stirrer and other internal parts on the microwave signal. At the same time, a targeting tool is used to ensure that the radar beam is correctly aligned with the center of the kettle bottom to reduce the measurement error. During the commissioning stage, technicians calibrate the radar level meter for empty and full kettle to ensure the measurement accuracy. In actual operation, the china solid radar level meter successfully realizes the continuous monitoring of the liquid level in the stirred reaction kettle, and maintains a stable and accurate output signal even in the environment of foam and steam generation.

Through the above case study, it can be seen that the radar level meter performs well in the level measurement of stirred reactor, which can adapt to the complex working conditions and provide reliable data support. Although the initial investment of radar level meter is relatively high, its long-term stable performance and low maintenance cost make it a worthwhile investment in complex applications such as stirred reactor.