Influence of Different Outlet Diameters on Atomization Performance of Liquid Beset Gas Nozzles


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The wet FGD system with the characteristics of stable and mature, which had been widely used in the large thermal power plants. In this system, spray nozzle plays a key role, and the atomization performance of the spray nozzle affects the desulfurization reaction rate and efficiency directly. A new type spray nozzle, liquid beset gas nozzle was came up with in this article. It makes use of compressed gas in the internal pipeline to crush the liquid flowed out of the external pipeline into small particles. To optimize the nozzle's structure and develop its atomization performance, then considered outlet diameters of nozzle as one of the main influencing factors, sets three outlet diameters of nozzles: 4mm, 5mm and 6mm. This experiment with water for medium uses a laser particle size analyzer and a high speed camera for analysis to take atomization performance's tests of liquid beset gas nozzles under different outlet diameters and working conditions. The results of experimental studies were concluded. Firstly, when the outlet diameter is 5mm, the total spraying performance was the best. Because this outlet diameter can make the nozzle be in a balance between effective crush, fully mixing and jams preventing. Secondly, the new type nozzle had certain adaptability, when working pressures changed, and can be widely used in the wet FGD system.



Advanced Materials Research (Volumes 550-553)

Edited by:

Zili Liu, Feng Peng and Xiaoguo Liu




D. P. Liu and B. J. Zhang, "Influence of Different Outlet Diameters on Atomization Performance of Liquid Beset Gas Nozzles", Advanced Materials Research, Vols. 550-553, pp. 3184-3187, 2012

Online since:

July 2012




[1] Yao Bingdong; Jiang Jinbao. Researches and Progress on the Spray Nozzles for Wet FGD [J]. Chemical Engineering & Machinery, 2006, 33 (7): 194-197.

[2] L. Juslin et al. Droplet size measurement: I. The effect of three independent variables on the droplet size distribution and spray angle from a pneumatic nozzle [J]. International Journal of Pharmaceutics 123 (1995)247-256.


[3] L. Juslin et al. Droplet size measurement: II. The effect of three independent variables with parameters describing the droplet size distribution from a pneumatic nozzle studied by multilinear stepwise regression analysis [J]. International Journal of Pharmaceutics 123 (1995).


[4] Germán Ferreira, Juan Antonio García et al. Design optimization of twin-fluid atomizers with an internal mixing chamber for heavy fuel oils [J]. Fuel Processing Technology 90 (2009)270-278.


[5] W. Duangkhamchan, F. Rains et al. CFD study of droplet atomic using a binary nozzle in fluidised bed coating [J]. Chemical Engineering Science 68 (2012)555-566.


[6] Aidan Leach, Gareth Chaplin et al. Comparison of the performance of liquid–gas injection nozzles in a gas–solid fluidized bed [J]. Chemical Engineering and Processing 48 (2009)780-788.


[7] D. Nuyttens, K. Batten et al. Effect of nozzle type, size and pressure on spray droplet Characteristics [J]. Biosystems engineering 97 (2007)333-345.