Ms. Ren Congjing, born in January 1983, is a lecturer. She received her bachelor's degree in Chemical Engineering and technology from Zhejiang University in July 2005, and her doctorate degree in chemical engineering from Zhejiang University in June 2010. From July 2010 to July 2020, she worked in Zhejiang University, and served as the director of the teaching section and the director of the office of the School of Innovation and Entrepreneurship. She was awarded the titles of advanced individual in entrepreneurship education in national universities, outstanding contributor to the preparation of the Fifth China "Internet +" College Student Innovation and Entrepreneurship Competition, and Advanced Worker of Zhejiang University in 2019.

1. Educational situation

2. working experience

3. Teaching work

1. Taught the postgraduate course Advanced Reaction Engineering (from September 2020 to now).

4. Scientific research

Ms. Ren Congjing has been engaged in multi-phase flow reactor process optimization, reactor acoustic detection and other related work for a long time, and has good theoretical foundation and practical experience in multiphase flow polymerization reactors and reactor acoustic detection. In scientific research work, aiming at various critical phenomena and key parameters existing in multiphase flow system, acoustic emission measurement technology with real-time online, safe and environmental protection, simple and accurate, non-intrusive flow field and suitable for industrial equipment and other harsh external environment characteristics is selected as a means, the direct correlation between the key parameters of the gas-solid two-phase system and the liquid-solid two-phase system and the acoustic signals in the multiphase flow system is obtained. Based on the analysis of the signal characteristics of a single channel in time domain, the criteria of critical parameters including critical fluidization velocity, critical turbulent velocity and critical suspension speed are established. Based on the analysis of multi-channel signal characteristics with spatial variation, the criteria of critical phenomena including particle flow structure, fluidization quality deterioration and slurry suspension height are established. Based on the theory of critical phenomena, the regulation basis of particle flow structure was established according to the essence of different particle flow structure and its transformation rule. The influence laws of distribution plate structure, gas distribution mode, external mixing equipment and bed structure on the flow structure of particles in gas-solid system were obtained respectively, and the corresponding improvement strategies of fluidization quality under the influence of different factors were put forward. The above research results provide an important basis for industrial production. Related academic achievements have been published in IECR, AIChE J, Chemical Journal, Chemical Progress and other domestic and foreign journals, and a total of 16 papers have been published, which have been recognized by experts in the same field.

5. Research direction

Multiphase flow reaction engineering, multiphase flow detection technology and signal analysis, process optimization and enhancement

6. The project being studied

1. Research on Fluidization State of Multiphase flow polymerization Reactor Based on particle vibration Signal Measurement and process Strengthening, Research Start-up Project of Ningbo Institute of Technology, Zhejiang University, 2020

2. "Development of new Production Process of Metallocene Fluidized bed ethylene octene copolymer", Science and Technology Project entrusted by enterprises and institutions, 2021

3. Development of Dry powder polyethylene catalyst feeding System, Science and Technology Project entrusted by enterprises and institutions, 2021

4. "500,000 tons/year Pentane solvent slurry method HDPE process package Development", science and technology project commissioned by enterprises and institutions, 2021

7. Representative article

1. Ren Congjing, Yang Yao, Huang Zhengliang, Sun Jingyuan*, Yang Yongrong, Wang Jingdai. Effect of scale up process on reactor performance within riser: Simulation using ozone decomposition. IECR, 2021, 60, 11479–11489.

2. Peng Liang, Yuming Chen, Congjing Ren*, Mei Chen, Binbo Jiang, Jingdai Wang, Yongrong Yang, Wei Li*. Efficient synthesis of low-polydispersity UHMWPE by elevating active sites on anchored POSS molecules. IECR , 2020, 59, 19964-19971.

3. Mei Chen, Yuming Chen, Wei Li*, Peng Liang, Congjing Ren*, Binbo Jiang, Jingdai Wang, Yongrong Yang. Synthesis of Weakly Entangled Ultra-High-Molecular-Weight Polyethylene with a Fine Particle Size. IECR, 2021, 60, 3354-3362.

4. Huang Zhengliang, Zhang Peng, Yang Yao, Ren Congjing *, Wang Jingdai, Yang Yongrong. Effects of external DC/AC electric fields on particle motions and wall sticking in fluidized bed with electrostatics. Journal of Chemical Engineering, 2021, 72 (9)

5. Ren Congjing, Tang Yueqi, Wang Jingdai*, Yang Yongrong. Online Estimation of Coke in a Circulating Fluidized Bed Based on Acoustic Emission Sensors and Multivariate Calibration; IECR, 2011, 50(14): 8420-8429.

6. Ren Congjing, Wang Jingdai, Song Di, Jiang Binbo, Liao Zuwei*, Yang Yongrong. Determination of particle size distribution by multi-scale analysis of acoustic emission signals in gas-solid fluidized bed. JZUSA, 2011, 12(4): 260–267.

7. Dong Kezeng, Ren Congjing *, Wang Jingdai, Yang Yongrong. Measurement of bed mass in propylene polymerization horizontal stirred bed reactor, 2011, 62(6):1509-1514.

8. Ke Yunlong, Ren Congjing *, Wang Jingdai, Yang Yongrong. Determination of Polyethylene Bulk Temperature by Raman Spectrum with Partial Least Square Method. Petrochemical Industry, 2011, 40(3):312-316.

9. Ren Congjing, Chen Min, Cao Yijia, Huang Zhengliang, Wang Jingdai *, Yang Yongrong. Application of passive acoustic emission measurement in chemical processes. Advances in Chemical Industry, 2011, 30(5):918-929.

10. Wang Jingdai, Ren Congjing, Yang Yongrong*. Characterization of flow regime transition and fluidization quality using acoustic emission measurement in gas-solid fluidized bed. AIChE J, 2010, 56(5): 1173-1183.

11. Ren Congjing, Wang Jingdai, Yang Yongrong *. Flow pattern and its transition of different particles in gas-solid fluidized bed. Journal of Zhejiang University Engineering and Technology, 2010, 44(2):305-309.

12. Ren Congjing, Wang Jingdai, Yang Yongrong *. Minimum fluidization velocity of bimodal polyethylene particles. Journal of Zhejiang University Engineering and Technology, 2009, 43(8):1687-1691.

13. Ren Congjing, Wang Jingdai, Yang Yongrong *, Chen Jiexun. Detection of distributor dead-zone in gas-solid fluidized bed by acoustic emission method. Journal of Zhejiang University Engineering and Technology, 2009, 43(3): 477-480.

14. Wang Jingdai, Ren Congjing, Yang Yongrong*, Hou Linxi. Characterization of particle fluidization pattern in a gas solid fluidized bed based on acoustic emission (AE) measurement. IECR, 2009, 48(18): 8508-8514.

15. Ren Congjing, Jiang Xiaojing, Wang Jingdai*, Yang Yongrong, Zhang Xiaohuan. Determination of critical speed for complete solid suspension using acoustic emission method based on multiscale analysis in stirred tank. IECR, 2008, 47(15): 5323-5327.

16. Ren Congjing, Wang Jingdai *, Yang Yongrong, Zhang Xiaohuan. Measurement of critical suspension speed for solid particles in stirred vessel based on acoustic method. Journal of Chemical Engineering, 2008, 59(8): 1986-1991.

17. Ren Congjing, Wang Jingdai *, Yang Yongrong, Shu Weijie. Sound signal analysis of particle movement and judgment of fluidization quality in gas-solid fluidized bed. Science in China B: Chemistry, 2008, 38(7): 645-651.

18. Ren Congjing, Wang Jingdai *, Yang Yongrong, Zhang Xiaohuan. Measurement of slurry suspension height in stirred tank by multi-scale analysis of acoustic emission technology. Chinese Journal of Chemical Engineering, 2008, 59(6): 1383-1389.

19. Ren Congjing, Wu Xuemei, Wang Jingdai, Jiang Binbo *. Multi-scale resolution of acoustic emission in gas-solid fluidized bed. Journal of Zhejiang University Engineering and Technology, 2008, 42(7): 1255-1261.

20. Ren Congjing, Wang Jingdai, Yang Yongrong, Jiang Binbo *. Determination of flow regime by analysis of acoustic signals from impaction between particles and distributor; Chinese Journal of Chemical Engineering, 2008, 59(4): 875-880.

8. Patents

1. Method for high pressure olefin polymerization], Patent number: ZL 202011117760.2, Patent application date: 2020.10.19, License Announcement date: September 7, 2021, Inventors: Jiang Binbo, Chen Zhanmin, Ren Congjing, Yang Yongrong, Wang Jingdai, Liao Zuwei, Huang Zhengliang, Sun Jingyuan, Yang Yao, Ma Yulong. [Authorized]

2. [Olefin gas-phase polymerization method], Patent number: ZL 202010213347.X, Patent application date: 2020.3.24, License Announcement date:, Inventor: Jiang Binbo, Jiang Chao, Ren Cong Jing, Yang Yongrong, Wang Jingdai, Huang Zhengliang, Sun Jingyuan, Yang Yao. [Authorized]

3. [Polyolefin production process grade switching method], Patent number: ZL 202011109285.4, patent application date: 2020.10.16, Authorization announcement date:,; Fan Xiaoqiang, Sun Jingyuan, Xu Liuqing, Yang Yao, Wang Jingdai, Huang Zhengliang, Liao Zuwei, Ren Congjing, Yang Yongrong, Jiang Binbo, Wu Wenqing, Han Guo Dong, Wang Xiaofei, Cui Yuhui, Wang Qingjiang [Authorized]

4. [Sound wave detecting method for catalyzer coke content in reactor], Patent number: ZL 200710164606.9, Patent application date: December 21, 2007, License Announcement date: August 11, 2010, Inventor: Yang Yongrong, Wang Jingdai, Yu Xianbo, Ren Congjing, Jiang Binbo.【Authorized】

5. [Method for detecting gas-phase method fluidized-bed polyethylene condensation process dewpoint], patent number: ZL 200710156123.4, patent application date: 2007.10.16, Authorization date: 2010.10.6, Certificate number: 684966, inventor: Wang Jingdai, Yang Yongrong, Cao Yijia, Ren Congjing, Yu Xianbo, Liu Wei, Jiang Xiaojing, Jiang Binbo, Liao Zuwei 【Authorized】

6. [Method for testing fluid bed reactor distributing plate], ZL 200710156125.3, Patent application date: October 16, 2007, License Announcement date: August 31, 2011, Inventor: Wang Jingdai, Yang Yongrong, Ren Congjing, Cao Yijia, Chen Jiexun, Jiang Xiaojing, Xu Xianjun, Jiang Binbo, Liao Zuwei [Authorized]

7. [Method for detecting viscosity of flowing system], Patent number: ZL 200910152607.0, Patent application date: September 10, 2009, Authorized Announcement date: November 23, 2011, Inventor: Wang Jingdai, Wang Bing, Chen Jiechun, Huang Zhengliang, Ren Congjing, Yang Yongrong [Authorized]

8. [Method for producing polyolefin Abstract], Patent number: ZL 202010856480.7, Application number: 202010856480.7, date of application: 2020.08.24, Date of Authorization: 2021.06.22, Inventor: Sun Jingyuan, Cheng Jianan, Wang Jingdai, Huang Zhengliang, Yang Yao, Fan Xiaoqiang, Yang Yongrong, Li Wei, Ren Congjing, Jiang Binbo, Liao Zuwei, Chen Yuming, Wu Wenqing, Han Guo Dong, Wang Xiaofei, Cui Yuhui, Wang Qingjiang [Authorized]