Research on Impinging Stream Technology and Development of Reaction Device

Impinging stream is one of the most effective methods to enhance heat and mass transfer between phases. It can be widely used in many unit operation processes, such as mixing, extraction, crystallization, crushing, adsorption and desorption.

Professor Zhang Jianwei of the College of Energy and Power Engineering led the research team to engage in research work on impinging stream technology and reactor development since 2000. In order to explore the unique flow structure and state in the impact zone, advanced laser measurement techniques such as PDA, PIV and PLIF were used to study the velocity field, concentration field and pressure field in the impact zone. The distribution characteristics of parameters such as instantaneous and time averaged velocity, concentration and turbulent kinetic energy were obtained. On this basis, nonlinear analysis methods such as chaos, fractal and wavelet transform were used to describe the relationship between the nonlinear parameters of chaotic flow field and the macroscopic motion characteristics of the flow field. The mathematical model of "two or more immersion impinging streams" was established and the nonlinear dynamic characteristics were studied by numerical simulation. The model was modified and improved by comparing with experimental data. More than 50 papers has been published in many well-known academic journals, such as J. Chem. Eng. Jpn., Can. J. Chem. Eng., Chem. Eng. Technol., Int. J. Chem. React. Eng., Chemical Journal, University Journal of Chemical Engineering and so on.

On the basis of theoretical research, the research team focused on the application of impinging stream technology and the transformation of scientific research achievements, and developed a variety of new impinging stream reactors and supporting devices. The "immersion circulating impinging stream reactor" and "multi-group coaxial impinging stream reactor" have been independently developed and designed. Among them, "a multi-component laminar impinging stream reactor" (ZL2014 1 0678158.4) and "a horizontal three-way impinging stream mixed reactor" (ZL2014 1 0678254.9) have been approved by the national invention patents, and utility model patents of nearly 10. It is proved that the reactor with impinging stream technology as the core has the characteristics of fast reaction speed, high mixing uniformity and low energy loss compared with the traditional reactors, which can effectively improve the economic benefits. In addition, there are no rotating parts in the equipment avoiding the phenomenon of “running, falling and dripping”, which embodies the design concept of environmental protection and energy saving, and has remarkable social benefits.

The above-mentioned research works have been supported by the National Natural Science Foundation of China, the Liaoning Natural Science Foundation, the Liaoning Provincial College Excellent Talents Support Program, the Liaoning Provincial Science and Technology Research Project, the Shenyang Major Scientific and Technological Achievements Transformation Project. The technology transfer with Shenyang orient Titanium Industry Co., Ltd. has achieved the industrialization of scientific research achievements.

College of energy and power engineering  Zhang Jianwei