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ISSN Печать: 1044-5110
ISSN Онлайн: 1936-2684
Indexed in
VISUALIZATIONS OF GAS-ASSISTED ATOMIZATION OF BLACK LIQUOR AND SYRUP/WATER MIXTURES AT ELEVATED AMBIENT PRESSURES
Краткое описание
Pressurized entrained flow high-temperature black liquor gasification (PEHT-BLG) is a novel technique to recover the inorganic chemicals and available energy in black liquor originating from kraft pulping. One of the key parts in the PEHT-BLG process is the spray atomizer where the viscous black liquor is disintegrated into a spray of fine droplets into the hot gasifier. In this study a high-speed photography system was used in order to visualize the spray formation of black liquor and syrup/water mixtures at elevated ambient pressures based on a conventional coaxially convergent gas-assisted atomizer. The main conclusion is that the breakup and atomization of black liquor by a gas-assisted atomizer is similar to that of a syrup/water mixture with similar physical properties. The observed difference in sphericity between black liquor and syrup/water may be explained by rapid cooling of the black liquor by the cool nitrogen gas at the nozzle exit, resulting in a sudden decrease in viscosity and possible skinning of the black liquor. Furthermore, it was found that an increased ambient pressure appeared to contract the spray to a more dense cloud of droplets compared to the corresponding atmospheric case.
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Carlsson Per, Wiinikka Henrik, Marklund Magnus, Grönberg Carola, Pettersson Esbjörn, Lidman Marcus, Gebart Rikard, Experimental investigation of an industrial scale black liquor gasifier. 1. The effect of reactor operation parameters on product gas composition, Fuel, 89, 12, 2010. Crossref
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Häggström Caroline, Öhrman Olov, Rownaghi Ali A., Hedlund Jonas, Gebart Rikard, Catalytic methanol synthesis via black liquor gasification, Fuel Processing Technology, 94, 1, 2012. Crossref
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Jakobs T., Djordjevic N., Fleck S., Mancini M., Weber R., Kolb T., Gasification of high viscous slurry R&D on atomization and numerical simulation, Applied Energy, 93, 2012. Crossref
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Kim Hakduck, Kim Changyeon, Lim Heechang, Song Juhun, Spray Formation of a Liquid Carbon Dioxide-Water Mixture at Elevated Pressures, Energies, 9, 11, 2016. Crossref
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Wachter Simon, Jakobs Tobias, Kolb Thomas, Experimental investigation on the influence of system pressure on resulting spray quality and jet breakup applying pressure adapted twin-fluid nozzles, International Journal of Multiphase Flow, 125, 2020. Crossref
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Wachter Simon, Jakobs Tobias, Kolb Thomas, Towards system pressure scaling of gas assisted coaxial burner nozzles – An empirical model, Applications in Energy and Combustion Science, 5, 2021. Crossref
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Arefin Amit M. E., Ananno Anan Ashrabi, Masud Mahadi Hasan, Rahman Mostafijur, Mourshed Monjur, Nahar Kamrun, Akhter Shamim, Design and experimental investigation of an internal mixing twin-fluid atomiser for the generation of test aerosol particles, Australian Journal of Mechanical Engineering, 2020. Crossref
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Mlkvik M., Stähle P., Schuchmann H.P., Gaukel V., Jedelsky J., Jicha M., Twin-fluid atomization of viscous liquids: The effect of atomizer construction on breakup process, spray stability and droplet size, International Journal of Multiphase Flow, 77, 2015. Crossref
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Broumand Mohsen, Thomson Murray J., Yun Sean, Hong Zekai, Spray Characterization of a Preheated Bio-Oil Surrogate at Elevated Pressures, Journal of Engineering for Gas Turbines and Power, 144, 11, 2022. Crossref