Essential Site Maintenance: Authorea-powered sites will be updated circa 15:00-17:00 Eastern on Tuesday 5 November.
There should be no interruption to normal services, but please contact us at [email protected] in case you face any issues.

loading page

A sliding-window based signal processing method for characterizing clusters in gas-solids high-density CFB reactor
  • +5
  • Chengxiu Wang,
  • Mengjie Luo,
  • Xin Su,
  • Xingying Lan,
  • Zeneng Sun,
  • Jinsen Gao,
  • Mao Ye,
  • Jesse Zhu
Chengxiu Wang
China University of Petroleum Beijing State Key Laboratory of Heavy Oil Processing

Corresponding Author:[email protected]

Author Profile
Mengjie Luo
China University of Petroleum Beijing State Key Laboratory of Heavy Oil Processing
Author Profile
Xin Su
China University of Petroleum Beijing State Key Laboratory of Heavy Oil Processing
Author Profile
Xingying Lan
China University of Petroleum Beijing State Key Laboratory of Heavy Oil Processing
Author Profile
Zeneng Sun
The University of Western Ontario
Author Profile
Jinsen Gao
China University of Petroleum Beijing State Key Laboratory of Heavy Oil Processing
Author Profile
Mao Ye
Dalian Institute of Chemical Physics, Chinese Academy of Sciences
Author Profile
Jesse Zhu
The University of Western Ontario
Author Profile

Abstract

Particle clusters in CFB risers were identified from the instantaneous solids holdup signals by a new sliding-window based signal processing method. By shifting the sliding time window and calculating the mean and the standard deviation within it, a non-linear threshold curve for identifying the clusters was derived instead of the conventional constant threshold. The optimal sliding window size was determined as Wb = 1024 data points based on the bisection method on the entire piece of signals. Using the proposed method, a more realistic characterization of the clusters in both the HDCFB and LDCFB was obtained by considering the bulk fluctuation of the gas-solids flow. The clusters in the HDCFB have higher solids holdup and lower velocity than that in the LDCFB. The HDCFB is also found to have a greater number of loose clusters for better gas-solids contacting and exchanges in the center of the riser.