Investigation of Fluidization of Solids Mixture with Different Particle Density for Chemical-Looping Combustion and Gasification

D.A. Sankin, G.A. Ryabov, O.M. Folomeev, I.A. Dolgushin

Abstract


The paper deals with the combustion and gasification of fuels in chemical looping systems with metal oxides - oxygen carriers. During the combustion and gasification of solid fuels the char-coal added to the circulating metal oxides. This results in a problem with fluidization of a binary mixture of solid particles with significantly different densities. At these circumstances, it is important to determine the hydrodynamic parameters of fluidization, minimal fluidization velocities and operation regimes of interconnected reactors. The paper describes the experimental setup and characteristics of chosen types of particles. The experimental results for minimal fluidization velocities, maximum pressure drop and pressure drop at minimal fluidization velocity were obtained for sand particles and for two types of aluminum oxides. It is shown that the addition of sand significantly reduces the minimum fluidization velocity and the pressure drop decreases almost linearly with increasing the volume fraction of sand. The investigations on acceptable relations to determine the parameters of hydrodynamics of binary mixtures of particles of different densities are continuing.


Full Text:

PDF

References


Lyngfelt A., Johansson M., Mattisson T. Chemical loop-ing combustion – Status of development, Proc. of CFB 9, Hamburg, 2008, pp. 39-53.

Markstr?m P., Lyngfelt A., Linderholm C. Chemical Looping Combustion in a 100 KW Unit for Solid Fuels, Proc. of Int. Conf. FBC 21, Naples, 2012, pp. 285-292.

Ad?nez Juan Chemical-Looping Combustion of Coal: Recent Developments and Technology Challenges, plenary lecture, Proc. of Int. Conf. FBC 21, Naples, 2012, pp. 12-27.

Ryabov G.A., Folomeyev O.M., Litun D.S., Sankin D.A. Separation of CO2 using chemical looping combustion and gasification of fuels [Separatsiya SO2 s ispolzovaniyem khimicheskikh tsiklov szhiganiya i gazifikatsii topliv], Tep-loenergetika [Thermal Engineering], 2009, no.6, pp. 39-49. (in Russ.)

Ryabov G.A., Sankin D.A., Folomeyev O.M. Using the technology of circulating fluidized-conductive layer for CO2 capture. Combustion and gasification in chemical cycles, Proceedings of the Russian Academy of Sciences. Power En-gineering Journal, 2014, no.4. (in Russ.)

Bolh? r – Nordenkampf, Kolbitsch J.P., Pr?ll T., Hof-bauer H. Performance of a NiO - Based Oxygen Carrier for Chemical Looping Combustion and Reforming in a 120 KW Unit, Paper Presented at the 9th International Conference on Greenhouse Gas Control Technologies, 2008.

Вerguerand N., Lyngfelt A. Design and Operation of a 10 KWth Chemical - Looping Combustor for Solid Fuels – Testing with South African Coal, Fuel, 2008, no.87(12), рр. 2713-2726.

Shen L., Wu J., Gao Z., Xiao J. Reactivity Deterioration of NiO/Al2O3 Oxygen Carrier for Chemical Looping Combus-tion of Coal in a 10 KWth Reactor, Combustion and Flame, 2009, no.156(7), рр. 1377-1385.

Shen L., Wu J., Xiao J. Experiments on Chemical Loop-ing Combustion of Coal with a NiO Based Oxygen Carrier, Combustion and Flame, 2009, no.156(3), рр. 721-728.

Shen L., Wu J., Xiao J., Song Q., Xiao R. Chemical - Looping Combustion of Biomass in a 10 KWth Reactor with Iron Oxide as an Oxygen Carrier, Energy & Fuels, 2009, no.23, рр. 2498-2505.

Ohlem?ller P., Busch J.-P., Str?hle J., Epple B. Opera-tion of a 1 MWth Chemical Looping Plant, Proc. of the 22nd Int. Conf on Fluidized Bed Conversion, Turku.

Ryabov G.A., Folomeyev O.M. Methods of calculating the fluidization in the material return system devices CFB, Proceedings of the Russian Academy of Sciences. Power En-gineering Journal, 2014, no.5. (in Russ.)

Aerov M.E., Todes O.M. Gidravlicheskiye i teplovyye osnovy raboty apparatov s statsionarnym i kipyashchim sloy-em [Hydraulic and thermal basics of devices with fixed and fluidized bed], Leningrad, Khimiya, 1968, 512 p. (in Russ.)

Goo J.H., Seo1 M.W., Kim S.D., Song B.H. Effects of Temperature and Particle Size on Minimum Fluidization and Transport Velocities in a Dual Fluidized bed, Proc. of the 20th Int. Conf. on FBC, Xian, 2009.

Isyemin R.L., Kuzmin S.N., Konyakhin V.V., Kon-dukov N.B. On the question of the calculation of the mini-mum fluidization velocity layer consisting of particles frac-tions differ greatly in size and shape (for example, anthracite culm and biogranules) [K voprosu o raschete minimalnoy skorosti psevdoozhizheniya sloya, sostoyashchego iz fraktsiy chastits, rezko otlichayushchikhsya po forme i razmeru (na primere antratsitovogo shtyba i biogranul)], Promyshlennaya teplotekhnika [Industrial heating engineering], 2007, vol. 29, no.7, pp. 155-158. (in Russ.)




DOI: http://dx.doi.org/10.24892/RIJIE/20160403

Refbacks

  • There are currently no refbacks.


Copyright (c) 2017 D.A. Sankin, G.A. Ryabov, O.M. Folomeev, I.A. Dolgushin

© Russian Internet Journal of Industrial Engineering. ISSN 2310-0818

E-mail: indust.engineering.ru@gmail.com

Another version of the web site: http://indust-engineering.ru