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How to obtain laboratory analysis values on-site

2011-03-17View Original

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How to obtain the medium concentration: When the medium flows in a vertical pipe, the pressure difference between any two measurement points consists of two components, namely the static pressure difference and the frictional resistance. The static pressure difference, with the positions of the two measurement points fixed, depends on the concentration (density) of the medium. To accurately obtain the concentration information of the medium from the differential pressure output signal, it is necessary to remove the frictional resistance signal from the measured differential pressure signal. Furthermore, errors caused by changes in the dielectric temperature and ambient temperature will also be compensated for. The typical accuracy can reach ±0.5%. How to determine the viscosity of the medium: To improve the reaction efficiency within the reactor, almost all polymerization reactors are equipped with stirring devices. For a given reaction setup, the power required for stirring depends on parameters such as the viscosity of the material, temperature, density, liquid level in the reactor, and stirring speed. Relatively speaking, three parameters need to be considered: stirring power (stirring current), a parameter that indicates the power consumed for stirring ; Stirring speed, this parameter indicates the magnitude of the shear rate ; For polymer temperature, the effect of temperature on viscosity also exhibits a highly nonlinear relationship, requiring compensatory correction. The typical accuracy can reach ±3%. Experts, can these two types of online monitoring and control meet the requirements of the manufacturing process?
Reply #22011-03-18
Our online monitoring team is capable of conducting real-time, continuous monitoring of parameters such as the density/concentration of liquids, polymerization rate, viscosity (polymerization degree), ratio control, phase separation interfaces, and the termination time of batch reactions, by using techniques such as soft sensing and data mining
Reply #32013-12-11
Are there any other opinions from everyone? Feel free to post, thank you.

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