Publication detail

Pressure loss and droplet entrainment under spray absorber conditions

CEJPEK, O. MALÝ, M. PRINZ, F. HÁJEK, O. BĚLKA, M. LINDOVSKÝ, J. HÁJEK, J. NOVOSAD, P. JEDELSKÝ, J.

Original Title

Type

journal article in Web of Science

Language

English

Original Abstract

The interaction of spray with counter-flowing flue gas causes pressure loss (Delta P) and influences droplet entrainment and sorbent loss in gas-liquid scrubbers. As these phenomena were usually investigated separately and not linked with atomizer characteristics, it is difficult to obtain insight into the scrubber operation and select an atomization device proper to particular process. Atomizers typically used in a spray column, together with pressure-swirl and twin fluid effervescent types, were tested in column-like conditions. All the atomizers were tested at the same liquid flow rate of 140 kg/h, with inlet pressure (p(in)) from 0.025 to 0.2 MPa under the counter-flow velocity (u(cf)) ranging from 0 to 1 m/s. A small-scale low-speed wind tunnel was specially designed to simulate spray column flow conditions. The Delta P and droplet entrainment were correlated with atomizer operating regimes. Empirical and analytical models of Delta P were compared with experimental results for different atomizers. Limitations of both models are discussed. The Delta P is influenced by the spray velocity at the discharge orifice (u(L)) and correlates well with the liquid kinetic energy (E-k) and Reynolds number at the discharge orifice. The atomizers working on higher p(in), provide a larger interfacial area, but yield higher E-k at the discharge orifice, causing larger Delta P and a greater risk of sorbent loss due to presence of smaller droplets.

Keywords

Hollow-cone; Full-cone; Effervescent; Pressure loss; Droplet entrainment; Spray column

Authors

CEJPEK, O.; MALÝ, M.; PRINZ, F.; HÁJEK, O.; BĚLKA, M.; LINDOVSKÝ, J.; HÁJEK, J.; NOVOSAD, P.; JEDELSKÝ, J.

Released

23. 8. 2024

Publisher

ELSEVIER

Location

AMSTERDAM

ISBN

1383-5866

Periodical

SEPARATION AND PURIFICATION TECHNOLOGY

Year of study

354

Number

State

Kingdom of the Netherlands

Pages count

URL

https://www.sciencedirect.com/science/article/pii/S1383586624030788

BibTex

@article{BUT189409,
  author="Ondřej {Cejpek} and Milan {Malý} and František {Prinz} and Ondřej {Hájek} and Miloslav {Bělka} and Jiří {Lindovský} and Jiří {Hájek} and Pavel {Novosad} and Jan {Jedelský}",
  title="Pressure loss and droplet entrainment under spray absorber conditions",
  journal="SEPARATION AND PURIFICATION TECHNOLOGY",
  year="2024",
  volume="354",
  number="8",
  pages="11",
  doi="10.1016/j.seppur.2024.129339",
  issn="1383-5866",
  url="https://www.sciencedirect.com/science/article/pii/S1383586624030788"
}