Development Prospects of Pneumatic Conveying Systems for Bulk Solids

Abstract

The article analyzes the current state of pneumatic conveying systems for bulk solids. Four key problems affecting the efficiency of such systems are considered: 1) abrasive wear of system components, 2) formation of material blockages in pipelines, 3) low energy efficiency, 4) degradation of conveyed material. It is established that the intensity of abrasive wear is determined by the conveying gas flow velocity and the mass concentration of the conveyed material. It is shown that blockage formation is caused by flow velocity reduction below minimum required values, changes in properties of the conveyed material, and system operation instability. The patterns of pressure loss variation as a function of air flow velocity and material mass concentration are presented. Methods and promising technologies for improving the efficiency of pneumatic conveying systems are systematized: transition to dense phase conveying mode, application of wear-resistant materials and special structural elements, use of stepped systems with variable pipeline diameter, implementation of fault monitoring systems and automatic control of process parameters. The results of the conducted research can be used in the design, operation, and modernization of industrial pneumatic conveying systems for bulk solids

Please cite this article in English as:

Demikhov K.E., Ochkov A.A., Skornyakov V.M. Development prospects of pneumatic conveying systems for bulk solids. Herald of the Bauman Moscow State Technical University, Series Mechanical Engineering, 2026, no. 2 (157), pp. 85--101 (in Russ.). EDN: MZKPOK

References

[1] Ostrovskiy G.M. Pnevmaticheskiy transport sypuchikh materialov v khimicheskoy promyshlennosti [Pneumatic transport of bulk materials in the chemical industry]. Leningrad, Khimiya Publ., 1984.

[2] Tarasov V.P., Tarasov A.V. Analysis of the features of pneumatic transport injection systems with drive feeders during their operation in transient and unsteady modes. Polzunovskiy vestnik, 2022, no. 3, pp. 50--57 (in Russ.). EDN: BRJDJI

[3] Mills D. Pneumatic conveying design guide. Oxford, Elsevier, 2004.

[4] De Freitas A.G., dos Santos R.B., Riascos L.A.M., et al. Experimental design and optimization of a novel solids feeder device in energy efficient pneumatic conveying systems. Energy Rep., 2023, vol. 9, pp. 387--400. DOI: https://doi.org/10.1016/j.egyr.2023.05.270

[5] Abe M.C., Gelladuga G.A., Mendoza C.J., et al. Pneumatic conveying technology: recent advances and future outlook. Eng. Proc., 2023, vol. 56, no. 1, art. 205. DOI: https://doi.org/10.3390/ASEC2023-16267

[6] Klinzing G.E., Rizk F., Marcus R.D., et al. Pneumatic conveying of solids. Chapman & Hall, 1997.

[7] Putilov V.Ya., Prokhorov V.B., Putilova I.V. Analyzing abrasive wear in the pipelines of pneumatic systems conveying finely dispersed loose materials. Therm. Eng., 2003, vol. 50, no. 1, pp. 64--71.

[8] Duarte C.A.R., de Souza F.J., de Vasconcelos Salvo R., et al. The role of inter-particle collisions on elbow erosion. Int. J. Multiph. Flow, 2017, vol. 89, pp. 1--22. DOI: https://doi.org/10.1016/j.ijmultiphaseflow.2016.10.001

[9] Verma R., Agarwal V.K., Pandey R.K., et al. Erosive wear reduction for safe and reliable pneumatic conveying systems: review and future directions. Life Cycle Reliab. Saf. Eng., 2018, vol. 7, no. 3, pp. 193--214. DOI: https://doi.org/10.1007/s41872-018-0055-7

[10] Zhou J.W., Liu Y., Liu S.Y., et al. Effects of particle shape and swirling intensity on elbow erosion in dilute-phase pneumatic conveying. Wear, 2017, vol. 380, pp. 66--77. DOI: https://doi.org/10.1016/j.wear.2017.03.009

[11] Macchini R., Bradley M.S.A., Deng T. Influence of particle size, density, particle concentration on bend erosive wear in pneumatic conveyors. Wear, 2013, vol. 303, no. 1-2, pp. 21--29. DOI: https://doi.org/10.1016/j.wear.2013.02.014

[12] Zhang Y., Zhou C., Liu H., et al. Abrasion resistant elbow. Patent CN 202828953. Appl. 23.04.2012, publ. 27.03.2013.

[13] Yang C., Yang Z., Yang B. Abrasion-resistant ceramic elbow. Patent US 20080169642. Appl. 14.08.2007, publ. 17.07.2008.

[14] Haugland I.B., Chladek J., Halstensen M. Monitoring of erosion in a pneumatic conveying system by non-intrusive acoustic sensors --- a feasibility study. Linkoping Electronic Conference Proceedings, 2019, vol. 1709, no. 12, pp. 78--84. DOI: https://doi.org/10.3384/ecp2017078

[15] Henry R.M., Al-Faysale M.S.M. Condition monitoring of bends in pneumatic conveying systems. In: COMADEM 89 International. Boston, Springer, 1989, pp. 525--529. DOI: https://doi.org/10.1007/978-1-4684-8905-7_84

[16] Razumov I.M. Psevdoozhizhenie i pnevmotransport sypuchikh materialov [Fluidization and pneumatic transport of bulk materials]. Moscow, Khimiya Publ., 1972.

[17] Barbosa P.R., Seleghim Jr.P. On the application of fuzzy logic control in pneumatic conveying systems. Journal of the Brazilian Neural Network Society, 2011, vol. 9, no. 4, pp. 256--265. DOI: http://dx.doi.org/10.21528/lnlm-vol9-no4-art4

[18] Li Z., Chu K., Pan R., et al. Computational study of gas‐solid flow in a horizontal stepped pipeline. Math. Probl. Eng, 2019, art. 2545347. DOI: https://doi.org/10.1155/2019/2545347

[19] Zheng Y., Rinoshika A. Analysis of particle dynamics in a horizontal pneumatic conveying of the minimum pressure drop based on POD and wavelet transform. Powder Technol., 2017, vol. 320, pp. 726--738. DOI: https://doi.org/10.1016/j.powtec.2017.07.092

[20] Jia W., Yan J. Pressure drop characteristics and minimum pressure drop velocity for pneumatic conveying of polyacrylamide in a horizontal pipe with bends at both ends. Powder Technol., 2020, vol. 372, pp. 192--203. DOI: https://doi.org/10.1016/j.powtec.2020.06.004

[21] Dikty M., Hilgraf P., Worthington R. Energy-saving pneumatic conveying pipe system. IEEE Cement Industry Techn. Conf. Record, 2008, pp. 229--240. DOI: https://doi.org/10.1109/CITCON.2008.25

[22] Kofu K. Pressure loss reduction in horizontal plug conveying of granular particles with ultrasonic vibration. Powder Technol., 2016, vol. 294, pp. 202--210. DOI: https://doi.org/10.1016/j.powtec.2016.02.034

[23] Kalman H. Attrition of powders and granules at various bends during pneumatic conveying. Powder Technol., 2000, vol. 112, no. 3, pp. 244--250. DOI: https://doi.org/10.1016/S0032-5910(00)00298-9

[24] Chapelle P., Christakis N., Abou-Chakra H., et al. Computational model for prediction of particle degradation during dilute-phase pneumatic conveying: modeling of dilute-phase pneumatic conveying. Adv. Powder Technol., 2004, vol. 15, no. 1, pp. 31--49. DOI: https://doi.org/10.1163/15685520460740052

[25] Ochkov A.A., Skornyakov V.M. Optimizing geometric parameters of a pipeline elbow in the pneumatic polyethylene transportation systems. Herald of the Bauman Moscow State Technical University, Series Mechanical Engineering, 2024, no. 4 (151), pp. 82--95 (in Russ.).EDN: WFXKYM

[26] Lorenz R.D. A theory of angel hair: analytic prediction of frictional heating of particulates in pneumatic transport. Powder Technol., 2019, vol. 355, pp. 264--267. DOI: https://doi.org/10.1016/j.powtec.2019.07.057

[27] Dhodapkar S., Solt P., Klinzing G. Understanding bends in pneumatic conveying systems. Chem. Eng., 2009, vol. 116, no. 4, pp. 53--60.

[28] Kotzur B.A., Bradley M.S., Berry, R.J., et al. Breakage characteristics of granulated food products for prediction of attrition during lean-phase pneumatic conveying. Int. J. Food Eng., 2016, vol. 12, no. 9, pp. 835--850. DOI: https://doi.org/10.1515/ijfe-2016-0045

[29] Brosh T., Kalman H., Levy A. DEM simulation of particle attrition in dilute-phase pneumatic conveying. Granular Matter, 2011, vol. 13, no. 2, pp. 175--181. DOI: https://doi.org/10.1007/s10035-010-0201-z