Optimization of Nozzle Design for Pulse Cleaning of Ceramic Filter

›› 2008, Vol. 16 ›› Issue (2): 306-313.

• PROCESS AND PRODUCT TECHNOLOGY • Previous Articles Next Articles

Optimization of Nozzle Design for Pulse Cleaning of Ceramic Filter

CHI Huachang^1,2, YU Liang², CHOI Joo-Hong², JI Zhongli¹

1. Department of Mechanical and Electrical Engineering, China University of Petroleum, Beijing 102249, China;
2. Department of Chemical and Biological Engineering, Gyeongsang National University, Jinju 660701, South Korea

Received:2007-09-14 Revised:2007-12-20 Online:2008-04-28 Published:2008-04-28
Supported by:
the National Natural Science Foundation of China(50411140527);Korea Science and Engineering Foundation

Optimization of Nozzle Design for Pulse Cleaning of Ceramic Filter

迟化昌^1,2, 于亮², 崔柱洪², 姬忠礼¹

1. Department of Mechanical and Electrical Engineering, China University of Petroleum, Beijing 102249, China;
2. Department of Chemical and Biological Engineering, Gyeongsang National University, Jinju 660701, South Korea

通讯作者: JI Zhongli,E-mail:jizhongli63@vip.sina.com
基金资助:
the National Natural Science Foundation of China(50411140527);Korea Science and Engineering Foundation

Abstract

Abstract: The experimental study was carried out to optimize the nozzle shape and dimension for the pulse clean-ing of a ceramic filter candle.A bench scale unit of ceramic filter consisting of four commercial filter elements was used to measure the traces of the transient pressure around the nozzle and the overpressure in the filter cavity during the pulse-jet injection of pulse gas.Overpressure in the filter cavity is related to the pulse cleaning force.Nozzle design is concerned to increase the overpressure at the open end of filter element of pulse cleaning inlet,as well as to minimize the consumption of pulse gas.Convergent nozzle induces more secondary flow and generates higher pulse cleaning effect than straight nozzle.Nozzles of different convergent ratio(ratio of outlet to inlet diameter of nozzle)by changing the convergent angle and height were tested.The outlet diameter of convergent nozzle seri-ously influences the cleaning effect.The optimum convergent ratio increases with the increase of pulse gas pressure. The nozzle position(distance of nozzle tip from the open end of filter inlet)is also important to decide the nozzle dimension.Nozzle of large outlet diameter accepts high pressure of pulse gas to provide large overpressure in the filter cavity of top position by applying long distance.

Key words: nozzle, ceramic filter, pulse cleaning

摘要： The experimental study was carried out to optimize the nozzle shape and dimension for the pulse clean-ing of a ceramic filter candle.A bench scale unit of ceramic filter consisting of four commercial filter elements was used to measure the traces of the transient pressure around the nozzle and the overpressure in the filter cavity during the pulse-jet injection of pulse gas.Overpressure in the filter cavity is related to the pulse cleaning force.Nozzle design is concerned to increase the overpressure at the open end of filter element of pulse cleaning inlet,as well as to minimize the consumption of pulse gas.Convergent nozzle induces more secondary flow and generates higher pulse cleaning effect than straight nozzle.Nozzles of different convergent ratio(ratio of outlet to inlet diameter of nozzle)by changing the convergent angle and height were tested.The outlet diameter of convergent nozzle seri-ously influences the cleaning effect.The optimum convergent ratio increases with the increase of pulse gas pressure. The nozzle position(distance of nozzle tip from the open end of filter inlet)is also important to decide the nozzle dimension.Nozzle of large outlet diameter accepts high pressure of pulse gas to provide large overpressure in the filter cavity of top position by applying long distance.

关键词: nozzle, ceramic filter, pulse cleaning

CHI Huachang, YU Liang, CHOI Joo-Hong, JI Zhongli. Optimization of Nozzle Design for Pulse Cleaning of Ceramic Filter[J]. , 2008, 16(2): 306-313.

迟化昌, 于亮, 崔柱洪, 姬忠礼. Optimization of Nozzle Design for Pulse Cleaning of Ceramic Filter[J]. , 2008, 16(2): 306-313.

References

1 Cuenca, M.A., Anthony, E.J., Pressurized Fluidized Bed Combustion, Blackie Academic & Professional, Glasgow, 211-254 (1995).
2 Peukert, W., “High temperature filtration in the process industry”, Filtr. Sep., 35 (6), 461-464 (1998).
3 Ji, Z.L., Shi, M.X., Ding, F.X., “Transient flow analysis of pulse-jet generating system in ceramic filter”, Powder Technol., 139, 200-207 (2004).
4 Seville, J.P.K., Chuah, T.G., Sibanda, V., Knight, P., “Gas cleaning at high temperatures using ceramic filters”, Adv. Powder Technol., 14 (6), 657-672 (2003).
5 Koch, D., Schulz, K., Seville, J.P.K., Clift, R., “Regeneration of rigid ceramic filters”, In: Proceedings of the 2nd International Symposium on Gas Cleaning at High Temperatures, Clift, R., Seville, J.P.K., Eds., Blackie Academic & Professional, Glasgow, 244-265 (1993).
6 Koch, D., Seville, J.P.K., Clift, R., “Dust cake detachment from gas filters”, Powder Technol., 86, 21-29 (1996).
7 Duo, W., Kirkby, N.F., Seville, J.P.K., Clift, R., “Patchy cleaning of rigid gas filters-I. A probabilistic model”, Chem. Eng. Sci., 52 (1), 141-151 (1997).
8 Kavouras, A., Krammer, G., “Deriving cake detachment versus cake area load in a jet pulsed filter by a mechanistic model”, Powder Technol., 133, 134-146 (2003).
9 Smith, D.H., Powell, V., Ahmadi, G., Ibrahim, E., “Analysis of operational filtration data Part I. Ideal candle filter behavior”, Powder Technol., 94, 15-21 (1997).
10 Ahmadi, G., Smith, D.H., “Analysis of steady-state filtration and backpulse process in a hot-gas filter vessel”, Aerosol Sci. Tech., 36, 665-677 (2002).
11 Schildermans, I., Baeyens, J., Smolders, K., “Pulse jet cleaning of rigid filters: A literature review and introduction to process modelling”, Filtr. Sep., 41 (5), 26-33 (2004).
12 Berbner, S., L ffler, F., “Pulse jet cleaning of rigid filter elements at high temperatures”, In: Proceedings of the 2nd International Symposium on Gas Cleaning at High Temperatures, Clift, R., Seville, J.P.K., Eds., Blackie Academic & Professional, Glasgow, 225-243 (1993).
13 Laux, S., Giernoth, B., Bulak, H., Renz, U., “Aspects of pulse-jet cleaning of ceramic filter elements”, In: Proceedings of the 2nd International Symposium on Gas Cleaning at High Temperatures, Clift, R., Seville, J.P.K., Eds., Blackie Academic & Professional, Glasgow, 203-224 (1993).
14 Ji, Z.L., Meng, X.B., Shi, M.X., Ding, F.X., “The interim process between pulse-backing cleaning and normal filtration processes of ceramic filter”, In: Proceedings of the 4th International Symposium on Gas Cleaning at High Temperatures, Dittler, A., Kasper, G., Eds., Karlsruhe, Germany, 211-219 (1999).
15 Choi, J.H., Seo, Y.G., Chung, J.W., “Experimental study on the nozzle effect of the pulse cleaning for the ceramic filter candle”, Powder Technol., 114, 129-135 (2001).
16 Ito, S., “Pulse jet cleaning and internal flow in a large ceramic tube filter”, In: Proceedings of the 2nd International Symposium on Gas Cleaning at High Temperatures, Clift, R., Seville, J.P.K., Eds., Blackie Academic & Professional, Glasgow, 266-279 (1993).
17 Ji, Z.L., Peng, S., Tan, L.C., “Numerical analysis of flow field in ceramic filter during pulse cleaning”, Chin. J. Chem. Eng., 11 (6), 626-632 (2003).
18 Ji, Z.L., Jiao, H.Q., Chen, H.H., “Image analysis on detachment process of dust cake on ceramic filter candle”, Chin. J. Chem. Eng., 13 (2), 178-183 (2005).
19 Cui, X.L., Ji, Z.L., Chen, H.H., “Effect of nozzle structure in the transient pressure in ceramic filter candle”, J. China Univ. Petrol., 25 (3), 65-67 (2001). (in Chinese)
20 Ito, S., Tanaka, T., Kawamura, S., “Changes in pressure loss and face velocity of ceramic filter candles caused by reverse cleaning in hot coal gas filtration”, Powder Technol., 100, 32-40 (1998).
21 Zhao, C.Q., Jiang, Y., Dynamics of Gas Jet, Beijing Institute of Technology Press, Beijing, 48-52 (1998). (in Chinse)
22 Grannell, S.K., Seville, J.P.K., “Effect of venture inserts on pulse cleaning of rigid ceramic filters”, In: Proceedings of the 4th International Symposium on Gas Cleaning at High Temperatures, Dittler, A., Kasper, G., Eds., Karlsruhe, Germany, 96-110 (1999).

[1]	XU Cong. Effects of Geometric Configurations on the Performance of Reverse Flow Diverters in Reverse Flow Mode [J]. Chin.J.Chem.Eng., 2012, 20(5): 856-862.
[2]	CHI Huachang, JI Zhongli, SUN Dongmei, CUI Lishan. Experimental Investigation of Dust Deposit within Ceramic Filter Medium during Filtration-Cleaning Cycles [J]. , 2009, 17(2): 219-225.
[3]	LI Haixia, JI Zhongli, WU Xiaolin, CHOI Joo-Hong. Numerical Investigation of Coupling Effect in Multipipe Ceramic Filter Vessel [J]. , 2008, 16(4): 558-563.
[4]	JI Zhongli, PENG Shu, TAN Licun. Numerical Analysis of Flow Field in Ceramic Filter During Pulse Cleaning [J]. , 2003, 11(6): 626-632.

Optimization of Nozzle Design for Pulse Cleaning of Ceramic Filter

Optimization of Nozzle Design for Pulse Cleaning of Ceramic Filter

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