Investigation of Circulation and Separation of Solids Binary Mixture in the Units with Chemical-Lopping Combustion and Gasification of Solid Fuels

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


The technology of chemical looping combustion and gasification of fuels is one of the most promising for CO2 capturing from power plants. During the combustion and gasification of solid fuels, a ash-coke residue is added to the metal oxides - oxygen carriers. Thus, solid flux consists of particles with different density. In these conditions it is important to determine how the circulation is changing and how the particles are separated in cyclones of the circulation loop. A description of methodology for simulating these processes, the experimental setup, and the experimental conditions are given. Data on effect of the gas velocity in a reactor with a circulating fluidized bed on the specific solid flow rate of the circulating material are given. It is shown that the influence of addition of light weight fraction (sand) in range of 3…12% to the mass of metal oxides (Al2O3) does not significantly change specific solid flow rate. The capture efficiency of the cyclone at a high concentration of solids is very high and exceeds 99.99%. With increasing of solid concentration, it increases somewhat. A complex dependence of mass concentration of the particles on the cyclone resistance is observed. As a result of the analysis of the experimental data of this work, as well as previous studies and foreign data, a formula is proposed for calculating the correction to the cyclone resistance on a pure gas flow. The noticeable influence of sand additive in range of 3…12% to the mass of Al2O3 is not found, which allows using the previously developed dependences for calculating the circulation and separation of particles in the combustion systems of solid fuels in chemical looping systems.

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Beal C., Epple B., Strohle J. Chemical looping: a Breakthrough CO2 Capture Technology, Proc. of the 22nd Int. Conf. on Fluidized Bed Conversion, Turky, Finland, 2015, pp. 871-878.

Mattisson T. et al. Chemical-looping technologies using circulating fluidized bed systems: status of development, Proc. of 12th. Conference on fluidized bed Technology, Krakow, Poland, 2017, pp. 23-34.

Ryabov G. et al. The Investigation of fluidization of solids mixture with different particles density, Proc. of CFB12, Krakow, Poland, 2017, pp. 179-186.

Sankin D.A., Ryabov G.A., Folomeev O.M., Dolgushin I.A. Investigation of fluidization of solids mixture with different particle density for chemical-looping combustion and gasification, Russian Internet Journal of Industrial Engineering, 2016, vol.4, no.4, pp. 15-20. (in Russ.). DOI: 10.24892/RIJIE/20160403

Ohlemüller P., Busch J.-P., Ströhle J., Epple B. Operation of a 1 MWth Chemical Looping Plant, Proc. of the 22nd Int. Conf on Fluidized Bed Conversion, Turku.

Ryabov G.A., Folomeev O.M., Sankin D.A., Melnikov D.A. Results Of Theoretical And Experimental Studies Of Hydrodynamics Of Circulation Loops In Circulating Fluidized Bed Reactors And Systems With Interconnected Reactors, Thermal Engineering, 2015, vol.62, iss.2, pp. 110-116. DOI: 10.1134/S0040601515020081

Krohmer B., Roper B., Seeber J., Stamatelopoulos G.-N. Operating experience with measures for improvement of cyclone removal efficiency, Proc. of 19-th Int. Conf. on FBC, Vienna, Austria, 2006.

Ryabov G.A., Folomeev O.M. Substantiating the techniques for calculating the furnace circuit of circulating fluidized bed boilers, Thermal Engineering, 2011, vol.58, no.6, pp. 456-463. DOI: 10.1134/S0040601511060115

Uzhov V.N. et al. Ochistka promyshlennykh gazov ot pyli [Purification of industrial gases from a dust], Moscow, Chemistry, 1981, 344 p. (in Russ.)

Knowlton T. Cyclone Systems in Circulating Fluidized Beds, Proc. of CFB12, Krakow, Poland, 2017, pp. 47-64.

Dolgov V.N. Aerodinamika i teploobmen tsiklona – utilizatora teploty zapylennykh gazov: avtoref. dis. kand. tekhn. nauk [Aerodynamics and heat exchange of the cyclone-heat recovery of dusty gases: author's abstract], Sverdlovsk, UPI, 1988, 16 p. (in Russ.)

Ryabov G.A., Folomeev O.M., Shaposhnik D.A. A study of systems for collecting and returning ash at installations with a circulating fluidized bed, Thermal Engineering, 2002, vol. 49, no.8, pp. 631-637.

Martínez A., Lisbona P., Lara Y. et al. Measurement of Solid Entrainment by Pressure Drop in the Cyclone, Proc. of 21-th Int. Conf. on Fluidized Bed Combustion, Naples, Italy, 2012, pp. 666-672



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