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Jing D, Ma M, Ge S, Zhang T, Meng X, Ren S. Study on the dust migration law and a spray dust suppression scheme in transportation roadway. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:59316-59326. [PMID: 37004612 DOI: 10.1007/s11356-023-26716-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 03/25/2023] [Indexed: 05/10/2023]
Abstract
To solve the problem of excessive dust concentration in the belt transportation roadway of the mine. Numerical simulations were used to study the dust migration in the belt transportation roadway under 1.5 m/s ventilation conditions. The simulation results show the process of dust ejection from the inflow chute to contamination of the whole belt transportation roadway, and the spatial distribution of dust velocity. A comprehensive dust reduction scheme of "central suppression and bilateral splitting" was designed according to the dust distribution, with simultaneous control of the infeed chute and the roadway. In practical application, pneumatic spraying greatly reduces the amount of dust in the guide chute. The misting screen has a significant effect on dust collection and segregation. The solution effectively controls the dust in the space of 20 m on both sides of the transfer point, and the dust removal efficiency reaches more than 90%.
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Affiliation(s)
- Deji Jing
- College of Safety Science and Engineering, Liaoning Technical University, Fuxin, 123000, China
- Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education, Liaoning Technical University, Fuxin, 123000, China
| | - Mingxing Ma
- College of Safety Science and Engineering, Liaoning Technical University, Fuxin, 123000, China.
- Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education, Liaoning Technical University, Fuxin, 123000, China.
| | - Shaocheng Ge
- College of Safety and Emergency Management Engineering, Taiyuan, 03000, China
| | - Tian Zhang
- College of Safety Science and Engineering, Liaoning Technical University, Fuxin, 123000, China
- Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education, Liaoning Technical University, Fuxin, 123000, China
| | - Xiangxi Meng
- Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education, Liaoning Technical University, Fuxin, 123000, China
- College of Software, Liaoning Technical University, Huludao, 125105, China
| | - Shuaishuai Ren
- College of Safety Science and Engineering, Liaoning Technical University, Fuxin, 123000, China
- Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education, Liaoning Technical University, Fuxin, 123000, China
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Qian J, Wang J, Liu H, Xu H. Numerical Investigation of Fine Particulate Matter Aggregation and Removal by Water Spray Using Swirling Gas Flow. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:16129. [PMID: 36498216 PMCID: PMC9740401 DOI: 10.3390/ijerph192316129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 11/26/2022] [Accepted: 11/30/2022] [Indexed: 06/17/2023]
Abstract
In this paper, a mathematical model based on the two-fluid frame model coupled with the population balance model which considers the aggregation of particles and droplets in detail for cyclonic spray dedusting is proposed. The model is applied to study the characteristics of multiphase flow field and the effects of the gas velocity, spray volume, and particle concentration on the removal efficiency. In addition, the simulation results are verified by the experimental data. The results suggest that the turbulence kinetic energy increases near the wall as the inlet velocity increases, and the spray region increases as the spray volume increases. This is conducive to turbulent mixing of the particles and droplets, and the agglomeration efficiency of the particles is improved, so the particle size increases, and the particle removal efficiency increases to 99.7% by simulation results are within the allowable range of error (about 99-99.5% in dedusting efficiency by experimental data). As the particle concentration increases, the particle removal efficiency initially increases, then decreases and reaches the highest value at 2 g/m3, which is due to the limited adsorption efficiency of the spray droplets. The results are helpful for providing a theoretical basis for spray to promote agglomeration of particles and improving the dust removal efficiency in the swirl field.
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Affiliation(s)
- Jianghai Qian
- Department of Fluid Mechanics, School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Junfeng Wang
- Department of Fluid Mechanics, School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Hailong Liu
- Department of Fluid Machinery, School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Haojie Xu
- Department of Engineering Thermal Physics, School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China
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Ahad J, Farooq A, Siddique W, Ahmed A, Ahmad M, Waheed K, Qureshi KR, Irfan N. Influence of variation in converging section and orifice plane on the performance of venturi scrubber by using CFD. PROGRESS IN NUCLEAR ENERGY 2022. [DOI: 10.1016/j.pnucene.2022.104323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Yang X, Yu H, Zhao J, Cheng W, Xie Y. Research on the coupling diffusion law of airflow-dust-gas under the modularized airflow diverging dust control technology. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2022.117703] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Farooq M, Ahmed A, Qureshi K, Shah A, Waheed K, Siddique W, Irfan N, Ahmad M. Study of an improved and novel venturi scrubber configuration for removal of radioactive gases from NPP containment air during severe accident. NUCLEAR ENGINEERING AND TECHNOLOGY 2022. [DOI: 10.1016/j.net.2022.03.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Nie W, Ma Q, Cai X, Peng H, Xu C, Guo C, Zhang S, Cheng L. A multi-indicator orthogonal investigation into the dust suppression effect of a shearer-mounted negative-pressure spraying device. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2022.117135] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Chakrovorty RS, Zinnah MA, Alam MR, Forhad HM, Moniruzzaman M, Saha B, Ahmed S, Roy R. Incorporating ash removal unit in local rice parboiling industries for flue gas cleaning and heat recovery. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 286:112172. [PMID: 33639424 DOI: 10.1016/j.jenvman.2021.112172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 01/20/2021] [Accepted: 02/08/2021] [Indexed: 06/12/2023]
Abstract
Local rice parboiling industries of Bangladesh are burdened with heavy emission. Despite recent modification in the rice-parboiling boiler, the amount of stack emission (especially particulate matter) from local rice parboiling industry is still considerably high to jeopardize public health and environmental sustainability. There is no provision of flue gas cleaning in these industries since flue gas cleaning often requires significant investment, complicated installation and heavy-maintenance. Therefore, a modified flue gas cleaning system, namely Ash removal unit (ARU) was designed for simultaneously and synergistically removing particulate matter (PM), SO2, NOx, CO2 and heat from flue gas of local rice parboiling industries. In this study, ARU was incorporated in a local rice parboiling industry in order to evaluate the co-removal efficiency achieved by the ARU. Installation of ARU eliminated PM from flue gas by 91.8%, while it removed 78.5% SO2, 78.3% NOx and 23.9% CO2 respectively from the emitting stack. Other than flue gas cleaning , ARU also facilitates heat exchange between flue gas and boiler feed water. Hence, flue gas temperature was dropped by 42.1%, while boiler feed water temperature was raised by 36% in 30 min. Moreover, adopting ARU also improved the ambient air quality surrounding the industrial area, since it reduced SO2, NOx, SPM, PM2.5 and PM10 level in ambient air by 81.7%, 78.2%, 21.1%, 22.9% and 43.1% respectively.
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Affiliation(s)
- R S Chakrovorty
- Bangladesh Council of Scientific & Industrial Research (BCSIR), Dhaka, Bangladesh
| | - Muhammad Ali Zinnah
- Bangladesh Council of Scientific & Industrial Research (BCSIR), Dhaka, Bangladesh
| | - Md Robiul Alam
- Bangladesh Council of Scientific & Industrial Research (BCSIR), Dhaka, Bangladesh
| | - H M Forhad
- Bangladesh Council of Scientific & Industrial Research (BCSIR), Dhaka, Bangladesh
| | | | - Badhan Saha
- Bangladesh Council of Scientific & Industrial Research (BCSIR), Dhaka, Bangladesh
| | - Shoeb Ahmed
- Bangladesh University of Engineering & Technology (BUET), Dhaka, Bangladesh.
| | - Rupesh Roy
- Bangladesh Council of Scientific & Industrial Research (BCSIR), Dhaka, Bangladesh.
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Optimization Investigation on Operating Parameters of a Scrubbing Tower Using a Genetic Algorithm. Chem Eng Technol 2020. [DOI: 10.1002/ceat.201900524] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Ma Q, Nie W, Yang S, Xu C, Peng H, Liu Z, Guo C, Cai X. Effect of spraying on coal dust diffusion in a coal mine based on a numerical simulation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 264:114717. [PMID: 32417573 DOI: 10.1016/j.envpol.2020.114717] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 04/26/2020] [Accepted: 04/30/2020] [Indexed: 05/14/2023]
Abstract
Aimed at effectively controlling coal dust pollution in the mining face of a coal mine, this study first conducted a theoretical analysis and then combined a spraying experiment and a numerical simulation to perform an in-depth examination of the atomizing characteristics and dust suppression performance of a coal cutter external spraying device. Based on the experimental spraying results, the optimal nozzle was determined to be a pressure round-mouth nozzle with an X-shaped core. The characteristics of the spray fields from nozzles of different calibers (1.6, 2.0 and 2.4 mm) at different spraying pressures (2, 4, 6 and 8 MPa) were then analyzed. It was found that the droplet concentration in the spray field increased with increasing spraying pressure and nozzle caliber. The droplet diameter was mainly dependent on the spraying pressure and varied more slowly with increased spraying pressure. At a spraying pressure of 8 MPa, the spray field formed could achieve effective dust suppression; specifically, the droplet concentration in the spray field was mostly more than 15 g/m3, and the droplet size was mainly distributed in the range of 30-100 μm. When using a 2.4 mm caliber nozzle, the dust concentration measured around the coal cutter operator was reduced to 87.21 mg/m3 under a spraying pressure of 8 MPa, suggesting adequate dust suppression.
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Affiliation(s)
- Qingxin Ma
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China; State Key Laboratory of Mining Disaster Prevention and Control Co-found by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China.
| | - Wen Nie
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China; State Key Laboratory of Mining Disaster Prevention and Control Co-found by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China.
| | - Shibo Yang
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China; State Key Laboratory of Mining Disaster Prevention and Control Co-found by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China.
| | - Changwei Xu
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China; State Key Laboratory of Mining Disaster Prevention and Control Co-found by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China.
| | - Huitian Peng
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China; State Key Laboratory of Mining Disaster Prevention and Control Co-found by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China.
| | - Zhiqiang Liu
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China; State Key Laboratory of Mining Disaster Prevention and Control Co-found by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China.
| | - Cheng Guo
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China; State Key Laboratory of Mining Disaster Prevention and Control Co-found by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China.
| | - Xiaojiao Cai
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China; State Key Laboratory of Mining Disaster Prevention and Control Co-found by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China.
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Ahmed A, Shah A, Qureshi K, Waheed K, Irfan N, Siddique W, Ahmad M, Farooq A. Investigation of iodine removal efficiency in a venturi scrubber using mass transfer model for CFD. PROGRESS IN NUCLEAR ENERGY 2020. [DOI: 10.1016/j.pnucene.2020.103243] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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11
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Yu H, Cheng W, Xie Y, Peng H. Spray dedusting scheme under hybrid ventilation at a fully mechanized excavation face. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:7851-7871. [PMID: 31889270 DOI: 10.1007/s11356-019-07453-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2019] [Accepted: 12/19/2019] [Indexed: 06/10/2023]
Abstract
In order to evaluate the dust suppression performance with a spraying system at the fully mechanized excavation face, an airflow-droplet-dust multiphase coupling model was established based on the Eulerian-Lagrangian method. Subsequently, the model's accuracy was validated experimentally using a self-developed system for measuring dust suppression efficiency. For the pressure/exhaust hybrid ventilation condition, the following conclusions can be drawn: with an increase of airflow migration distance, the number of vortices gradually decreased, and dust-capturing probability caused by collision with wall decreased gradually along the axial direction of the roadway. Jointly driven by the rebounded airflow, the entrainment effect of high-velocity jets around the pressure inlet, and the transverse vortex field near the cutting face, three high-concentration dust particle clusters, denoted as particle flows I, II, and III, were formed, and the distribution patterns of dust particle clusters after the implementation of different spray schemes were determined. By analyzing the droplet field distribution surrounding the coal cutting head and comparing the dust suppression performance, the study proposed two optimal spray schemes: with gravity-driven supply of water, the spray scheme K2.0-4 MPa delivered optimum dust suppression performance, and the mean dust concentrations at specific fixed operating points dropped to 130 mg/m3; after utilizing a booster pump, the P2.0-8 MPa spray scheme delivered optimum dust suppression performance, with a mean dust concentration at fixed operating points dropping to 65 mg/m3. After applying the K2.0-4 MPa and P2.0-8 MPa schemes, the dust suppression performance was better for the dust with bigger size. The dust suppression efficiencies for the respirable dust were less than 60.7 and 72.5%, respectively. Other dust prevention measures should be taken to further reduce the dust hazard.
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Affiliation(s)
- Haiming Yu
- College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Weimin Cheng
- College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao, 266590, China.
- State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China.
| | - Yao Xie
- College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Huitian Peng
- College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao, 266590, China
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Investigation on the Effect of Structural Parameters on Cavitation Characteristics for the Venturi Tube Using the CFD Method. WATER 2019. [DOI: 10.3390/w11102194] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The venturi tube is a special kind of pipe which has been widely applied in many fields. Cavitation is one of the most important research issues for the Venturi tube. Hence, three key structural parameters (contraction angle, diffusion angle and contraction ratio) were selected to investigate the influence of different factors on cavitation characteristics, using the computational fluid dynamics (CFD) method. A series of experiments for measuring the relationship between differential pressure and flow rate were carried out to verify the accuracy of the simulation method. Results showed that the simulation results had a high accuracy and the numerical method was feasible. The average vapor volume fraction of cross-section from the throat in the axial direction increased with increasing contraction angle. The cavity length increased with increasing contraction angle. The average volume fraction in the diffusion section rapidly decreased with increasing diffusion angle. The diffusion angle had no significant effect on the cavitation characteristics in the throat section and had a significant influence in the diffusion section. The average vapor volume fraction increased with decreasing contraction ratio. The contraction ratio had no significant effect on the cavity length under the same differential pressure. The average vapor volume fraction increased with decreasing contraction ratio. However, the variation in the throat section was less than the diffusion section. Under the same inlet and outlet pressure, the cavity lengths for different contraction ratios were basically the same, which indicated that the contraction ratio had no significant effect on the cavity length.
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Droplet size prediction model based on the upper limit log-normal distribution function in venturi scrubber. NUCLEAR ENGINEERING AND TECHNOLOGY 2019. [DOI: 10.1016/j.net.2019.03.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Li C, Lu P, Zhang A, Zhang C, Yan X. Mass transfer modeling and industrial validation for sodium aerosols removal in a designed turbulent contact absorber. Chem Eng Res Des 2019. [DOI: 10.1016/j.cherd.2019.04.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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15
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Wang J, Sun Y, Gao X, Mannan MS, Wilhite B. Experimental study of electrostatic hazard inside scrubber column using response surface methodology. Chem Eng Sci 2019. [DOI: 10.1016/j.ces.2018.12.060] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Ashfaq T, Qureshi K, Shah A, Waheed K, Siddique W, Irfan N, Ahmed M, Farooq A. CFD investigation of iodine mass transfer in venturi scrubbing solution of Filtered Containment Venting System. PROGRESS IN NUCLEAR ENERGY 2019. [DOI: 10.1016/j.pnucene.2018.11.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Bal M, Reddy TT, Meikap B. Performance evaluation of venturi scrubber for the removal of iodine in filtered containment venting system. Chem Eng Res Des 2018. [DOI: 10.1016/j.cherd.2018.08.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Investigation of dust particle removal efficiency of self-priming venturi scrubber using computational fluid dynamics. NUCLEAR ENGINEERING AND TECHNOLOGY 2018. [DOI: 10.1016/j.net.2018.01.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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19
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An investigation of the nozzle’s atomization dust suppression rules in a fully-mechanized excavation face based on the airflow-droplet-dust three-phase coupling model. ADV POWDER TECHNOL 2018. [DOI: 10.1016/j.apt.2018.01.012] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Ali H, Plaza F, Mann A. Flow visualization and modelling of scrubbing liquid flow patterns inside a centrifugal wet scrubber for improved design. Chem Eng Sci 2017. [DOI: 10.1016/j.ces.2017.06.047] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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21
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Prediction of hydrodynamic characteristics of a venturi scrubber by using CFD simulation. SOUTH AFRICAN JOURNAL OF CHEMICAL ENGINEERING 2017. [DOI: 10.1016/j.sajce.2017.10.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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22
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Characteristics and mechanism of bubble breakup in a bubble generator developed for a small TMSR. ANN NUCL ENERGY 2017. [DOI: 10.1016/j.anucene.2017.05.015] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Moharana A, Goel P, Nayak AK. Performance estimation of a venturi scrubber and its application to self-priming operation in decontaminating aerosol particulates. NUCLEAR ENGINEERING AND DESIGN 2017. [DOI: 10.1016/j.nucengdes.2017.05.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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25
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Guerra VG, Achiles AE, Béttega R. Influence of Droplet Size Distribution on Liquid Dispersion in a Venturi Scrubber: Experimental Measurements and CFD Simulation. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.6b03761] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vádila G. Guerra
- Department
of Chemical Engineering, Federal University of São Carlos, Rodovia Washington Luiz, km 235, 13565-905 São Carlos, São Paulo, Brazil
| | - Ana Elisa Achiles
- Department
of Chemical Engineering, Federal University of São Carlos, Rodovia Washington Luiz, km 235, 13565-905 São Carlos, São Paulo, Brazil
| | - Rodrigo Béttega
- Department
of Chemical Engineering, Federal University of São Carlos, Rodovia Washington Luiz, km 235, 13565-905 São Carlos, São Paulo, Brazil
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26
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Experimental research on aerosols collection performance of self-priming venturi scrubber in FCVS. PROGRESS IN NUCLEAR ENERGY 2015. [DOI: 10.1016/j.pnucene.2015.09.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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27
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Ali M, Yan C, Sun Z, Gu H, Mehboob K. Dust particle removal efficiency of a venturi scrubber. ANN NUCL ENERGY 2013. [DOI: 10.1016/j.anucene.2012.11.005] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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28
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CFD simulation of dust particle removal efficiency of a venturi scrubber in CFX. NUCLEAR ENGINEERING AND DESIGN 2013. [DOI: 10.1016/j.nucengdes.2012.12.013] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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29
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A combined CFD modeling with population balance equation to predict pressure drop in venturi scrubbers. RESEARCH ON CHEMICAL INTERMEDIATES 2013. [DOI: 10.1007/s11164-013-1018-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Xue HT, Wang HG, Huang XD, Shen P, Ji GZ. Loss of Smad4 expression inhibits epithelial-mesenchymal transition in SMMC-7721 cells. Shijie Huaren Xiaohua Zazhi 2012; 20:923-929. [DOI: 10.11569/wcjd.v20.i11.923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the influence of loss of Smad4 expression on TGF-β1-induced epithelial-mesenchymal transition in the human hepatocellular carcinoma cell line SMMC-7721.
METHODS: The influence of loss of Smad4 expression on the expression of β-catenin and Vimentin mRNAs and proteins was evaluated by RT-PCR and Western blot. Immunofluorescence was used to analyze the location and fluorescence intensity of Smad4, β-catenin, Vimentin in non-transfected SMMC-7721 cells and those transfected with Smad-specific siRNAs (RNAi-Smad4-2 and RNAi-Smad4-12) or unspecific siRNA (RNAi-NC).
RESULTS: Compared to non-transfected SMMC-7721 cells and those tranfected with RNAi-NC, the expression of β-catenin mRNA and protein remarkably increased in SMMC-7721 cells transfected with RNAi-Smad4-2 or RNAi-Smad4-12 (all P < 0.05). Loss of Smad4 expression promoted β-catenin nuclear translocation. Immunofluorescence assay revealed that β-catenin fluorescence was located in the nuclei of non-transfected SMMC-7721 cells and those tranfected with RNAi-NC, but in the cytoplasm of SMMC-7721 cells transfected with RNAi-Smad4-2 or RNAi-Smad4-12. On the other hand, loss of Smad4 expression down-regulated Vimentin protein expression (P < 0.05) and cytoplasmic fluorescence intensity, but had no significant impact on Vimentin mRNA expression in SMMC-7721 cells and those transfected with different siRNAs.
CONCLUSION: Loss of Smad4 expression regulates β-catenin and Vimentin and therefore plays an important role in inhibiting epithelial-mesenchymal transition in SMMC-7721 cells.
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