Optimization of Nozzle Design for Pulse Cleaning of Ceramic Filter

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

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

收稿日期:2007-09-14 修回日期:2007-12-20 出版日期:2008-04-28 发布日期:2008-04-28
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

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

摘要/Abstract

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

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

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.

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.

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Optimization of Nozzle Design for Pulse Cleaning of Ceramic Filter

Optimization of Nozzle Design for Pulse Cleaning of Ceramic Filter

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