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Effect of Gas-Liquid Contact Intensification on Heat and Mass Transfer in Deflector and Rod Bank Desulfurization Spray Tower. Processes (Basel) 2021. [DOI: 10.3390/pr9081269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The deflector and the rod bank are commonly used to optimize flue gas distribution in the original spray tower (OST) of a wet flue gas desulfurization system (WFGD). In this paper, the internal optimization mechanism of the deflector desulfurization spray tower (DST) and the rod bank desulfurization spray tower (RBST) are studied. Based on the Euler–Lagrange method, the standard k-ε turbulence model, an SO2 absorption model and a porous media model, the numerical simulation of the desulfurization spray tower is carried out with the verification of the model rationality. The results show that there are gas-liquid contact intensification effects in DST and RBST. Compared with OST, gas-liquid contact intensification enhances the heat and mass transfer effects of DST and RBST. The temperature difference between inlet and outlet of flue gas increased by 3.3 K and the desulfurization efficiency of DST increased by 1.8%; the pressure drop decreased by 37 Pa. In RBST, the temperature difference between the flue gas inlet and outlet increased by 5.3 K and the desulfurization efficiency increased by 3.6%; the pressure drop increased by 33 Pa.
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del Valle-Zermeño R, Formosa J, Chimenos JM. Wet flue gas desulfurization using alkaline agents. REV CHEM ENG 2015. [DOI: 10.1515/revce-2015-0002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThe continued great dependency on fossil fuels entails increasing SO
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Koech L, Everson R, Neomagus H, Rutto H. Dissolution kinetics of sorbents and effect of additives in wet flue gas desulfurization. REV CHEM ENG 2014. [DOI: 10.1515/revce-2014-0024] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractFlue gas desulfurization (FGD) technology has been adopted by a number of power stations for the removal of sulfur dioxide (SO
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Rutto H, Enweremadu C. Dissolution of a South African calcium based material using urea: An optimized process. KOREAN J CHEM ENG 2011. [DOI: 10.1007/s11814-011-0136-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Joshi JB, Nere NK, Rane CV, Murthy BN, Mathpati CS, Patwardhan AW, Ranade VV. CFD simulation of stirred tanks: Comparison of turbulence models. Part I: Radial flow impellers. CAN J CHEM ENG 2011. [DOI: 10.1002/cjce.20446] [Citation(s) in RCA: 123] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Rutto HL. Effect of Addition of Ammonium Compounds on the Dissolution Rate of a South African Magnesium-Based Material. JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 2011. [DOI: 10.1252/jcej.10we017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Rutto H, Siagi Z, Mbarawa M. Effect of ammonium compounds on dissolution rate of South African calcium-based material. JOURNAL OF HAZARDOUS MATERIALS 2009; 168:1532-1536. [PMID: 19447546 DOI: 10.1016/j.jhazmat.2009.03.097] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2008] [Revised: 03/07/2009] [Accepted: 03/10/2009] [Indexed: 05/27/2023]
Abstract
The rate at which limestone dissolves is very important in wet flue gas desulphurisation process (FGD). High dissolution rates provide better alkalinity that is important for sulphur dioxide (SO(2)) absorption. The dissolution characteristics have been studied by using a pH-Stat method at 60 degrees C, at pH value of 5, stirrer speed of 100 rpm and particle size of 44 microm. This paper examines the use of ammonium compound as the possible additives that will enhance the dissolution rate of limestone. The dissolution rates were measured according to the shrinking core model with surface control, i.e. (1-(1-X)(1/3))=k(r)t. It was found that the dissolution rate increases in the presence of ammonium compounds. Upon addition of 0.5 g of ammonium nitrate, the dissolution rate constants increased by 170%. As the pH is increased the dissolution rate decreases. The dissolution reaction follows a shrinking core model with the chemical reaction control as the rate-controlling step.
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Affiliation(s)
- Hillary Rutto
- Department of Mechanical Engineering, Pretoria Campus, Tshwane University of Technology, Private Bag X680, 0001 Pretoria, South Africa
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YAGI HIDEHARU, OKAMOTO KYOSUKE, NAKA KEIJI, HIKITA HARUO. CHEMICAL ABSORPTION OF CO2 AND SO2 INTO Ca(OH) 2 SLURRY. CHEM ENG COMMUN 2007. [DOI: 10.1080/00986448408940198] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- HIDEHARU YAGI
- a Department of Chemical Engineering , University of Osaka Perfecture , 4-804 Mozu-Umemachi, Sakai City, Osaka, 591, Japan
| | - KYOSUKE OKAMOTO
- a Department of Chemical Engineering , University of Osaka Perfecture , 4-804 Mozu-Umemachi, Sakai City, Osaka, 591, Japan
| | - KEIJI NAKA
- a Department of Chemical Engineering , University of Osaka Perfecture , 4-804 Mozu-Umemachi, Sakai City, Osaka, 591, Japan
| | - HARUO HIKITA
- a Department of Chemical Engineering , University of Osaka Perfecture , 4-804 Mozu-Umemachi, Sakai City, Osaka, 591, Japan
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Kakaraniya S, Kari C, Verma R, Mehra A. Gas Absorption in Slurries of Fine Particles: SO2−Mg(OH)2−MgSO3 System. Ind Eng Chem Res 2007. [DOI: 10.1021/ie061461h] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sajan Kakaraniya
- Department of Chemical Engineering, Indian Institute of Technology, Bombay, Powai, Mumbai-400076, India
| | - Chandrakala Kari
- Department of Chemical Engineering, Indian Institute of Technology, Bombay, Powai, Mumbai-400076, India
| | - Ravish Verma
- Department of Chemical Engineering, Indian Institute of Technology, Bombay, Powai, Mumbai-400076, India
| | - Anurag Mehra
- Department of Chemical Engineering, Indian Institute of Technology, Bombay, Powai, Mumbai-400076, India
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Akbar M, Ghiaasiaan S. Modeling the gas absorption in a spray scrubber with dissolving reactive particles. Chem Eng Sci 2004. [DOI: 10.1016/j.ces.2003.10.024] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Takashina T, Honjo S, Ukawa N, Iwashita K. Effect of Ammonium Concentration on SO2 Absorption in a Wet Limestone Gypsum FGD Process. JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 2002. [DOI: 10.1252/jcej.35.197] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Toru Takashina
- Hiroshima Research and Development Center, Mitsubishi Heavy Industries, Ltd
| | - Shintaro Honjo
- Hiroshima Research and Development Center, Mitsubishi Heavy Industries, Ltd
| | - Naohiko Ukawa
- Hiroshima Research and Development Center, Mitsubishi Heavy Industries, Ltd
| | - Koichiro Iwashita
- Engineering and Construction Center, Mitsubishi Heavy Industries, Ltd
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TAKASHINA TORU, HONJO SHINTARO, UKAWA NAOHIKO, OISHI TSUYOSHI. Effect of Limestone Concentration and Particle Size on SO2 Absorption in Wet FGD Process. JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 2001. [DOI: 10.1252/jcej.34.810] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- TORU TAKASHINA
- Hiroshima Research & Development Center, Mitsubishi Heavy Industries, Ltd
| | - SHINTARO HONJO
- Hiroshima Research & Development Center, Mitsubishi Heavy Industries, Ltd
| | - NAOHIKO UKAWA
- Hiroshima Research & Development Center, Mitsubishi Heavy Industries, Ltd
| | - TSUYOSHI OISHI
- Engineering & Construction Center, Mitsubishi Heavy Industries, Ltd
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Brogren C, Karlsson HT. Modeling the absorption of SO2 in a spray scrubber using the penetration theory. Chem Eng Sci 1997. [DOI: 10.1016/s0009-2509(97)00126-7] [Citation(s) in RCA: 101] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Gas absorption into a slurry accompanied by chemical reaction with solute from sparingly soluble particles. ACTA ACUST UNITED AC 1987. [DOI: 10.1016/0300-9467(87)80023-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Tamhankar S, Gupte S, Chaudhari R. Kinetics of a non-catalytic slurry reaction: Reaction of acetylene with cuprous oxide suspended in water. ACTA ACUST UNITED AC 1981. [DOI: 10.1016/0300-9467(81)85002-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Miyachi M, Iguchi A, Uchida S, Koide K. Effect of solid particles in liquid-phase on liquid-side mass transfer coefficient. CAN J CHEM ENG 1981. [DOI: 10.1002/cjce.5450590515] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Alper E, Deckwer WD, Danckwerts P. Comparison of effective interfacial areas with the actual contact area for gas absorption in a stirred cell. Chem Eng Sci 1980. [DOI: 10.1016/0009-2509(80)85118-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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