Assoc.Prof. Guozhao Ji
Dalian University of Technology
Title: Pyrolysis of plastic waste in rotary kiln with solid heat carriers
Abstarct: Plastic is the basic material of industrial and agricultural production in human society. Due to the characteristic of easy aging and damage during using process, a large amount of plastic wastes is produced and accumulated in the environment, causing serious environmental pollution problem and resource waste. Therefore, plastic waste pollution prevention and control has become an important part of the national development strategy. Pyrolysis technology is a promising method for the green and high-value treatment, disposal, and resource utilization of organic solid waste. It can not only convert plastic waste into high value-added energy product in the form of pyrolysis oil, gas, and char, but also is an effective way to control and reduce plastic waste pollution and explore a low-carbon and sustainable social development model. However, there are many problems such as high energy consumption, poor operation stability, and complex products in the pyrolysis process, which have become the key issues that limit the development of pyrolysis technology. In this presentation, based on the pyrolysis mechanism of plastic waste, and from the property of plastic wastes, the solid heat carrier was added in the self-designed rotary kiln reactor to improve the heat and mass transfer efficiency. This study provided a significant theoretical basis of the application of pyrolysis of plastic waste process based on the rotary kiln with solid heat carrier.
Prof. Zhongliang Liu
College of Environmental & Energy Engineering, Beijing University of Technology
Deputy director of the Chinese Society of Heat Transfer under the Chinese Society of Engineering Thermophysics
Title: Advances in the studies and control technologies of frost deposition on cold surface
Abstarct: Frost deposition is a very common phenomenon occurring on cold surfaces in both our daily lives and engineering applications. It can result in many serious negative effects on cryogenic equipment and systems, including flow passage blockage, poor heat transfer performance, pressure drop increase, low energy efficiency and even system malfunction. Therefore, frost deposition control is very important for the equipment and these systems and has been attracting huge attentions from both industries and scientists. In this talk, the frost formation fundamentals and the influences of cold surface characteristics (hydrophilicity and hydrophobicity) and external fields (electric and magnetic) are briefly reviewed and advances in frost deposition control including basic theory and various technologies are introduced in full length. The outlook for feasible frost deposition control technologies is presented.