Experimental study on the particle flow patterns in a cyclone dipleg with a trickle valve
An experimental apparatus including a dipleg and a trickle valve was established to simulate the operation of a suspended dipleg-trickle valve system of cyclone used in fluid catalytic cracking (FCC) unit. The flow regimes in the dipleg and the discharge modes in the trickle valve were studied by co...
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| Published in | Petroleum science Vol. 17; no. 3; pp. 822 - 837 |
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| Main Authors | , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Beijing
China University of Petroleum (Beijing)
01.06.2020
KeAi Publishing Communications Ltd |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1672-5107 1995-8226 |
| DOI | 10.1007/s12182-020-00449-7 |
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| Abstract | An experimental apparatus including a dipleg and a trickle valve was established to simulate the operation of a suspended dipleg-trickle valve system of cyclone used in fluid catalytic cracking (FCC) unit. The flow regimes in the dipleg and the discharge modes in the trickle valve were studied by combining the observation of experimental phenomena with the analysis of transient pressure fluctuation. The results show that the flow regimes in the dipleg have two types—the dilute–dense phase coexisting falling flow and the dilute falling flow. Correspondingly, the trickle valve also has two discharge modes—the intermittent periodic dumping discharge and the continuous trickling discharge. The power spectrum density of pressure fluctuation displays that the gas–solids flow in the dipleg-trickle valve system is characterized by a low-frequency pulsation. The coherence coefficient explains the origin and propagation of pressure fluctuation in the system. Eventually, a map describing the flow regimes and discharge modes related to the operation parameters was proposed, which can provide a helpful guidance for the operation of cyclone dipleg-trickle valve system in FCC unit. |
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| AbstractList | An experimental apparatus including a dipleg and a trickle valve was established to simulate the operation of a suspended dipleg-trickle valve system of cyclone used in fluid catalytic cracking (FCC) unit. The flow regimes in the dipleg and the discharge modes in the trickle valve were studied by combining the observation of experimental phenomena with the analysis of transient pressure fluctuation. The results show that the flow regimes in the dipleg have two types—the dilute–dense phase coexisting falling flow and the dilute falling flow. Correspondingly, the trickle valve also has two discharge modes—the intermittent periodic dumping discharge and the continuous trickling discharge. The power spectrum density of pressure fluctuation displays that the gas–solids flow in the dipleg-trickle valve system is characterized by a low-frequency pulsation. The coherence coefficient explains the origin and propagation of pressure fluctuation in the system. Eventually, a map describing the flow regimes and discharge modes related to the operation parameters was proposed, which can provide a helpful guidance for the operation of cyclone dipleg-trickle valve system in FCC unit. |
| Author | Wei, Yao-Dong Lu, Chun-Xi Yan, Chao-Yu Chen, Jian-Yi Sun, Guo-Gang |
| Author_xml | – sequence: 1 givenname: Chao-Yu surname: Yan fullname: Yan, Chao-Yu organization: Beijing Key Laboratory of Process Fluid Filtration and Separation, College of Mechanical and Transportation Engineering, China University of Petroleum-Beijing – sequence: 2 givenname: Guo-Gang surname: Sun fullname: Sun, Guo-Gang email: ggsunbj@163.com organization: Beijing Key Laboratory of Process Fluid Filtration and Separation, College of Mechanical and Transportation Engineering, China University of Petroleum-Beijing – sequence: 3 givenname: Jian-Yi surname: Chen fullname: Chen, Jian-Yi organization: Beijing Key Laboratory of Process Fluid Filtration and Separation, College of Mechanical and Transportation Engineering, China University of Petroleum-Beijing – sequence: 4 givenname: Yao-Dong surname: Wei fullname: Wei, Yao-Dong organization: Beijing Key Laboratory of Process Fluid Filtration and Separation, College of Mechanical and Transportation Engineering, China University of Petroleum-Beijing – sequence: 5 givenname: Chun-Xi surname: Lu fullname: Lu, Chun-Xi organization: State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering and Environment, China University of Petroleum-Beijing |
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| Cites_doi | 10.1016/0032-5910(78)80044-8 10.1016/S0032-5910(97)03341-X 10.1016/S0009-2509(00)00499-1 10.1007/s12182-016-0087-4 10.1016/j.pecs.2007.02.001 10.1007/978-3-662-07377-3 10.1016/0032-5910(86)80112-7 10.1016/S0921-8831(08)60525-7 10.1205/cherd.04123 10.1016/j.ijmultiphaseflow.2010.12.007 10.1016/0032-5910(86)80107-3 10.1016/j.ces.2007.12.024 10.1016/S0032-5910(00)00296-5 10.1016/S0009-2509(99)00282-1 10.1002/aic.690360619 10.1016/S0032-5910(05)80025-7 10.1002/aic.690270308 10.1016/S0032-5910(98)00156-9 10.1016/0032-5910(73)80047-6 10.1016/S1385-8947(99)00144-8 10.1016/j.ces.2006.12.092 10.1163/156855200750172060 10.1016/S1672-2515(07)60159-6 10.1016/j.ces.2004.09.054 10.1021/ie034213j 10.1016/S0032-5910(97)03395-0 10.1016/S0032-5910(96)03226-3 10.1016/0009-2509(91)80001-F 10.1016/0032-5910(83)85010-4 10.1016/S0032-5910(02)00215-2 |
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| SubjectTerms | Catalytic cracking Coherence coefficient Cyclones Dilution Discharge Dumping Earth and Environmental Science Earth Sciences Economics and Management Energy Policy Falling Flow distribution Flow mapping Flow pattern Fluid catalytic cracking Industrial and Production Engineering Industrial Chemistry/Chemical Engineering Mineral Resources Modes Ocean dumping Original Paper Pressure Solids flow |
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| Title | Experimental study on the particle flow patterns in a cyclone dipleg with a trickle valve |
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