A novel particle trap impactor for use with the gas-quenching probe sampling system
Artikel i vetenskaplig tidskrift, 2004

A novel particle trap impactor has been developed for use with the gas-quenching probe in order to exclude solid particles from entering into the probe during sampling of gaseous metallic species in fluidized bed combustion conditions. The impactor must be small in size (empty set(impactor)less than or equal toempty set(probe) = 45 mm) but capable of collecting a relatively large amount of particles at elevated temperatures. As the first step, the impactor was designed, constructed, and tested at room temperature for KCl aerosol particles. The impactor with a nozzle of 0.95 mm in diameter, in combination with the orifice-to-jet diameter ratio of 1.5 and the ratio of the jet-to-plate spacing to jet diameter at 1.4 yielded a sharp cutoff curve with a maximum collection efficiency of about 0.9 and a rootStk(50) value of about 0.22. In addition, the collection efficiency of the impactor was compared with the particle removal efficiency of a filter of the same type as the filter previously used with the gas-quenching probe. The difference from the comparison is very small, indicating that the impactor can be used to replace the filter to prevent fly ash particles from entering the gas-quenching probe in fluidized bed combustion conditions.

HIGH-PRESSURE

AMMONIA

COMBUSTION-CHAMBER

HIGH-TEMPERATURE

PERFORMANCE

CONDENSATION

SIZE DISTRIBUTIONS

AEROSOLS

IMPACTOR

FLUIDIZED-BED BOILER

VIRTUAL

Författare

K. Q. Tran

Göteborgs universitet

Magnus Hagström

Göteborgs universitet

John G. Korsgren

Göteborgs universitet

Britt-Marie Steenari

Chalmers, Institutionen för kemi och biovetenskap

Oliver Lindqvist

Göteborgs universitet

Jan B. C. Pettersson

Göteborgs universitet

Aerosol Science and Technology

0278-6826 (ISSN) 1521-7388 (eISSN)

Vol. 38 955-962

Ämneskategorier

Fysikalisk kemi

DOI

10.1080/027868290511290