Heterogeneous solution gas content detection device and detection method

Abstract

The invention discloses a heterogeneous solution gas content detection device and detection method. The detection device is fixedly connected with an ultrasonic transducer on the upper surface of a quartz crystal wedge block to form an ultrasonic probe, and the ultrasonic transducer is sequentially connected with a pulse generating and receiving instrument and a data signal processing instrument through wires. The ultrasonic feedback is not influenced by physical factors such as bubble conductivity, shape and speed, so that the detection sensitivity is improved. The non-invasive detection of the gas content of the solution is realized, the detection requirement is greatly reduced, and the convenience is improved. And in the detection process, the multi-point in-situ detection of the solution can be realized. And the comprehensiveness and the accuracy of a detection result are improved. And an amplitude ratio calculation method is adopted to judge the gas content, so that the quantification degree of the ultrasonic detection gas content is improved. The detection device is low in detection cost, light in equipment, safe to operate, high in penetrating power, small in influence of reaction media and capable of achieving in-situ detection. Defects and deficiencies of common gas content detection means can be effectively avoided.

Description

technical field [0001] The invention relates to the field of gas holdup detection of heterogeneous solution. Specifically relates to a heterogeneous solution gas holdup detection device and detection method. Background technique [0002] Stirring and mass transfer of heterogeneous solutions are often encountered in petroleum, biological, pharmaceutical and chemical industries, such as extraction towers, reactors, flotation columns and other chemical and pharmaceutical processing equipment. Among them, the gas dispersion and gas-liquid mass transfer process in the heterogeneous process are relatively complicated, and the mass transfer efficiency will have a direct impact on the reaction result. Therefore, the control and detection of mass transfer efficiency is an extremely important factor in the production process. Gas holdup is one of the important flow characteristic parameters to reflect the effect of gas-liquid two-phase mass transfer. When the solution contains more ...

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Problems solved by technology

There are many methods for measuring gas holdup commonly used, such as: optical fiber method, conductivity method, differential pressure method, etc. Among them, the optical fiber method can obtain more detailed information on local gas holdup, such as bubble velocity, bubble size and distribution etc., but the fiber optic method generally can only measure the situation when the gas velocity is small. The method can only measure the average bubble behavior between the two sections of the reactor, and cannot measure the bubble behavior at a local point like the optical fiber and conductometric method

At the same time, the above-mentioned methods all require the detector to be immersed in the reaction solution, which brings great difficulties to the in-situ real-time detection of gas holdup.

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