Dust particle removal efficiency of a venturi scrubber

Abstract The venturi scrubber is one of the most efficient gas cleaning devices to remove the contaminated particles from gaseous stream during severe accident in nuclear power plant. This study is focused on the dust particle removal efficiency of the venturi scrubber experimentally and theoretically. The venturi scrubber encapsulates the dust particles in petite water droplets flowing into it. The water injected into the scrubber is in the form of water film. The study investigates the removal efficiency of venturi scrubber for throat gas velocities of 130, 165 and 200 m/s and liquid flow rates 0.3–1 m 3 /h, whereas dust concentration ranges between 0.1 and 1 g/m 3 . The hydrophobic titanium dioxide (TiO 2 ) particles having density 4.23 g/cm 3 and mean diameter of 1 μm are used as dust particles in this research. Filtration technique is used to measure the concentration of dust particles at inlet and outlet. Experimental results show that the removal efficiency is higher with the increase of throat gas velocity and liquid flow rate. A mathematical model is employed for the verification of experimental results. The model concurs well with the experimental results.

[1]  Smeeta Fokeer,et al.  An investigation of geometrically induced swirl applied to lean phase pneumatic flows , 2006 .

[2]  W H WALTON,et al.  The suppression of airborne dust by water spray. , 1960, International journal of air pollution.

[3]  Wenju Jiang,et al.  Simultaneous absorption of NOx and SO2 from flue gas with pyrolusite slurry combined with gas-phase oxidation of NO using ozone. , 2011, Journal of hazardous materials.

[4]  S. Nukiyama,et al.  An Experiment on the Atomization of Liquid : 5th Report, The Atomization Pattern of Liquid by means of an Air Stream , 1938 .

[5]  Walter Reim,et al.  Protection of the containment of the twin BWR KRB II plant against overpressure failure during severe accidents , 1995 .

[6]  D. Haschke,et al.  Pressure release of containments during severe accidents in Switzerland , 1995 .

[7]  M. Lehner,et al.  Aerosol Separation Efficiency of a Venturi Scrubber Working in Self-Priming Mode , 1998 .

[8]  Roy M. Harrison,et al.  Graphical Analysis of the Performance of Venturi Scrubbers for Particle Abatement. Part I: Rapid Collection Efficiency Evaluation , 2007 .

[9]  R. H. Boll.  Particle Collection and Pressure Drop in Venturi Scrubbers , 1973 .

[10]  H. F. Barbarika,et al.  Venturi scrubber performance model , 1978 .

[11]  S. Calvert.  Venturi and other atomizing scrubbers efficiency and pressure drop , 1970 .

[12]  Joachim Kolditz.  GKN I and GKN II: Reactor containment pressure relief and measures against hydrogen energy release in case of severe accidents , 1995 .

[13]  K. Chang,et al.  Performance estimation of a Venturi scrubber using a computational model for capturing dust particles with liquid spray. , 2006, Journal of hazardous materials.

[14]  T. Mi,et al.  Dust removal and desulphurization in a novel venturi scrubber , 2012 .

[15]  W. Marshall,et al.  The rates of evaporation of sprays , 1968 .

[16]  F. Mayinger,et al.  Operating results and aerosol deposition of a venturi scrubber in self-priming operation , 1995 .

[17]  Yasusi Tanasawa,et al.  An Experiment on the Atomization of Liquid by Means of an Air Stream (the 2nd Report). , 1937 .

[18]  H. Johnstone,et al.  Collection of Aerosols in a Venturi Scrubber , 1951 .

[19]  S. H. Lee,et al.  Prediction for particle removal efficiency of a reverse jet scrubber , 2006 .

[20]  Katsumi Shozugawa,et al.  Deposition of fission and activation products after the Fukushima Dai-ichi nuclear power plant accident. , 2012, Environmental pollution.

[21]  N. Nevers,et al.  Air Pollution Control Engineering , 1994 .