Detail publikace

Mechanisms and strategies for ash deposition reduction in flue gas heat exchanger

Guo, Z., Li, N., Klemeš, J.J., Wang, Q., Zeng, M.

Originální název

Mechanisms and strategies for ash deposition reduction in flue gas heat exchanger

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Abstract: Ash deposition in flue gas heat exchanger affects its heat transfer performance and lifecycle, which becomes a crucial factor restricting the efficient recovery and utilization of flue gas waste heat. In this paper, a numerical method was established to investigate the characteristics of ash deposition in tube bundle heat exchangers. An integrated fouling model including transport, rebound, deposition, and removal of particles was employed to predict the behaviour of particles. Then, the effects of particle diameter and flue gas velocity on collision mass, deposition mass, absolute deposition ratio, and relative deposition ratio were studied. At last, the thermal–hydraulic and ash deposition characteristics of three different tube shapes were compared. The results showed that the low-velocity regions on the circumference were the primary locations of particle deposition, and the medium-diameter particles were the main deposition components. With the increase in flue gas velocity, the deposition mass of large-diameter particles decreased, and that of small-diameter particles increased. The use of an elliptical tube and flattened round tube with an apex angle of 60°had also excellent thermal–hydraulic and anti-fouling performances. Consequently, the ash deposition and wear can be reduced by increasing flue gas velocity, filtering medium and large-diameter particles, and using elliptical and flattened round tubes. Graphic abstract: [Figure not available: see fulltext.]. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

Klíčová slova

Ash deposition; Heat exchanger; Numerical simulation; Waste heat recovery

Autoři

Guo, Z., Li, N., Klemeš, J.J., Wang, Q., Zeng, M.

Vydáno

8. 6. 2021

Nakladatel

Springer Nature Switzerland AG

ISSN

1618-954X

Periodikum

Clean Technologies and Environmental Policy

Číslo

1

Stát

Spojené státy americké

Strany od

1

Strany do

2

Strany počet

13

URL

https://link.springer.com/article/10.1007%2Fs10098-021-02083-2

BibTex

@article{BUT171866,
  author="Jiří {Klemeš}",
  title="Mechanisms and strategies for ash deposition reduction in flue gas heat exchanger",
  journal="Clean Technologies and Environmental Policy",
  year="2021",
  number="1",
  pages="1--2",
  doi="10.1007/s10098-021-02083-2",
  issn="1618-954X",
  url="https://link.springer.com/article/10.1007%2Fs10098-021-02083-2"
}