Discharge characteristics of coal and extraction residue from direct coal liquefaction in partial fluidization silo

Zhen Liu; Haiquan An; Jiansheng Zhang

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Discharge characteristics of coal and extraction residue from direct coal liquefaction in partial fluidization silo

Full Length Article | Updated：2026-01-06

- Discharge characteristics of coal and extraction residue from direct coal liquefaction in partial fluidization silo
- Chinese Journal of Chemical Engineering Vol. 52, Issue 12, Pages: 78-87(2022)
- Affiliations：
  
  1. Department of Energy and Power Engineering, Tsinghua University,Beijing,China,100084
  2. National Institute of Clean-and-Low-Carbon Energy,Beijing,China,100084
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2022
- Accepted：
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Zhen Liu, Haiquan An, Jiansheng Zhang. Discharge characteristics of coal and extraction residue from direct coal liquefaction in partial fluidization silo[J]. Chinese Journal of Chemical Engineering, 2022, 52(12): 78-87.
DOI：

Zhen Liu, Haiquan An, Jiansheng Zhang. Discharge characteristics of coal and extraction residue from direct coal liquefaction in partial fluidization silo[J]. Chinese Journal of Chemical Engineering, 2022, 52(12): 78-87. DOI：

摘要

Abstract

Gasification of extraction residue (ER) from direct coal liquefaction with pulverized coal is an efficient way for the utilization of carbonaceous wastes

which improve the overall efficiency of direct coal liquefaction technology. The discharge characteristics of ER mixing with pulverized coal is important paraments for its gasification process

which is seldom studied in the literature. In this study

the discharge characteristics of the pulverized coal (M1) as well as its mixture with ER (M2) were systematically investigated in an atmospheric pressure partial fluidization silo with different fluidization apparent velocity. It was observed that although M2 is a viscous powder with lower flowability than M1

the mass flow rate of M2 is 65% higher than M1 at the 3.7 mm·s

-1

apparent gas velocity. M2 exhibits the properties of Geldart A type powder

which improves the mass flow rate and stability of the discharged material. The mass flow rate of both M1 and M2 first increases and then slowly decreases with the increase of apparent gas velocity of the fluidizing air

which means the discharge process of M1 and M2 can be optimized by the apparent gas velocity.

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