Research on Ash Removal for the Water Wall of Coal Gasifier under Impact Loadings

Abstract:

Vibration responses of the water wall of coal gasifier under impact loads were investigated. The influences of different diameters of water walls and impact loads on the effectiveness of ash removal were further considered. The results showed that the peak acceleration along the axial direction of the water wall is greater than 80% of the peak acceleration at the impact point when rapping devices are installed at the 1/4, 1/2 and 3/4 heights. Moreover, rapping devices should be staggered 30 degree in the hoop direction at different heights to avoid the dead zone of ash removal. Furthermore, vibration accelerations increase with increasing the diameter of water wall, while the impact time should be as short as possible for higher efficiency of ash removal.

• Periodical: Applied Mechanics and Materials (Volumes 226-228)
• Pages: 227-231
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.226-228.227
• Online since: November 2012
• Authors: Xiao Tao Zheng, Jing Jing, Jiu Yang Yu, Cheng Gang Wang, Jian Min Xu
• Keywords: Ash Removal, Fatigue Strength, Gasifier, Impact

References

[1] D.J. Ye. The development stratagem of "green coal" [R]. The management of Chinese electricity establishment (in Chinese).2005,10,19~20.

[2] S.J. Wang. Design of Shell Coal Gasification key equipment[J]. Gas Purification (in Chinese).2003, 3(5):11-13.

[3] J.Y. Yu,Y. Chang and C.G. Wang et al. Rapping devices(in Chinese). 200510018677 [P]. 2005-10-26.

[4] Khan, Zahirul H. Bench- and pilot-testing of sieving electrostatic precipitator[D]. Russia: The Russ College of Engineering and Technology, 2007.

[5] F.Miloua1, A.Tilmatine1 et al. Optimization of the rapping process of an intermittent electrostatic precipitator[J]. Applied Physics. 2008, 1(41): 81-85.

[6] K.Y. Chen, J. Sun. ESP anode plate rapping mechanism analysis [J]. Labor protection technology (in Chinese).1981, 11: 8~15.

[7] K.Y. Chen. The impact of the impulse response caused by uneven plate surface [J].Vibration and dynamic testing (in Chinese).1983, 2: l~8.

[8] K.Y. Chen.Analysis of vibration characteristics of the anode plate of the electrostatic precipitator[J]. Electric Power Environmental Protection (in Chinese).1992,1(8):54-61.

[9] K.Y. Chen.The use and development of Rapping technology in the dust removal equipment.Vibration,testing and diagnosis (in Chinese).1997, 2(17):8-14.

[10] L.Q. Ma.Orthogonal experiment method to play in ESP vibration cycle test[J]. Henan Electric (in Chinese). 1996, 4:42-43.

[11] W. He.Rapping waste heat boiler ash device development[J].Energy Engineering (in Chinese). 1999, 4:31-33.

[12] J.Y. Yu, X.T. Zheng. Reach on Mechanical behavior of Rapping-off ash On the Coal gasifier water wall. Chamical Engineering and Machinery (in Chinese). In press.2011.

[13] J.Y. Yu, X.T. Zheng Y.H. Liu. The Distribution analysis of the Rapping-off-ash Device on the Water-cooling Wall of Gasifier[J].Oil and Chemical Equipment (in Chinese).2007, 4(10):11-13.