Wear resistance improvement of thermal plant fan mill impact plates based on numerical flow simulation
Authors
Kozić, M.Ristić, Slavica S.
Katavic, B.
Jegdić, Bore

Prvulović, M.
Prokolab, M.
Linić, Suzana

Article (Published version)
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Numerical simulation of 3D multiphase flow is performed to determine the velocity field in the fan mill. The mixture model of the Euler-Euler approach is used. Recirculating gas is a primary phase that carries granular phases including the coal powder and sand. The latter causes heavy wear of mill impact plates. The optimal form of hardfacing geometry and technology has an impact both on velocity magnitude and direction of flow in such a way as to reduce plate wear. This paper presents results of surface modification (based on numerical simulation), implemented on impact plates of the fan mill in the Kostolac B power plant in Serbia. Fishbone hardfacing is made in order to increase the lifetime of impact plates and extend the period between overhauls of fan mills. The experimental tests of fishbone surfacing plates, in exploitation conditions, show that the applied modification, hardfacing technologies and coating materials, give expected results. The application of this hardfacing in ...the form of a fishbone is simpler, faster and more economical compared to complete overlaying and honeycomb impact plate surfacing. The relative weight loss of base plate after an 1440-hour period of exploitation is 8%, while the weight losses for the hard-faced plate is below 7%.
Keywords:
CFD / Fan mill / Multiphase flow / Thermal power plant / WearSource:
Structural Integrity and Life, 2017, 17, 3, 221-228Publisher:
- Society for Structural Integrity and Life, Institute for Material Testing
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IHTMTY - JOUR AU - Kozić, M. AU - Ristić, Slavica S. AU - Katavic, B. AU - Jegdić, Bore AU - Prvulović, M. AU - Prokolab, M. AU - Linić, Suzana PY - 2017 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/2216 AB - Numerical simulation of 3D multiphase flow is performed to determine the velocity field in the fan mill. The mixture model of the Euler-Euler approach is used. Recirculating gas is a primary phase that carries granular phases including the coal powder and sand. The latter causes heavy wear of mill impact plates. The optimal form of hardfacing geometry and technology has an impact both on velocity magnitude and direction of flow in such a way as to reduce plate wear. This paper presents results of surface modification (based on numerical simulation), implemented on impact plates of the fan mill in the Kostolac B power plant in Serbia. Fishbone hardfacing is made in order to increase the lifetime of impact plates and extend the period between overhauls of fan mills. The experimental tests of fishbone surfacing plates, in exploitation conditions, show that the applied modification, hardfacing technologies and coating materials, give expected results. The application of this hardfacing in the form of a fishbone is simpler, faster and more economical compared to complete overlaying and honeycomb impact plate surfacing. The relative weight loss of base plate after an 1440-hour period of exploitation is 8%, while the weight losses for the hard-faced plate is below 7%. PB - Society for Structural Integrity and Life, Institute for Material Testing T2 - Structural Integrity and Life T1 - Wear resistance improvement of thermal plant fan mill impact plates based on numerical flow simulation VL - 17 IS - 3 SP - 221 EP - 228 UR - https://hdl.handle.net/21.15107/rcub_cer_2216 ER -
@article{ author = "Kozić, M. and Ristić, Slavica S. and Katavic, B. and Jegdić, Bore and Prvulović, M. and Prokolab, M. and Linić, Suzana", year = "2017", abstract = "Numerical simulation of 3D multiphase flow is performed to determine the velocity field in the fan mill. The mixture model of the Euler-Euler approach is used. Recirculating gas is a primary phase that carries granular phases including the coal powder and sand. The latter causes heavy wear of mill impact plates. The optimal form of hardfacing geometry and technology has an impact both on velocity magnitude and direction of flow in such a way as to reduce plate wear. This paper presents results of surface modification (based on numerical simulation), implemented on impact plates of the fan mill in the Kostolac B power plant in Serbia. Fishbone hardfacing is made in order to increase the lifetime of impact plates and extend the period between overhauls of fan mills. The experimental tests of fishbone surfacing plates, in exploitation conditions, show that the applied modification, hardfacing technologies and coating materials, give expected results. The application of this hardfacing in the form of a fishbone is simpler, faster and more economical compared to complete overlaying and honeycomb impact plate surfacing. The relative weight loss of base plate after an 1440-hour period of exploitation is 8%, while the weight losses for the hard-faced plate is below 7%.", publisher = "Society for Structural Integrity and Life, Institute for Material Testing", journal = "Structural Integrity and Life", title = "Wear resistance improvement of thermal plant fan mill impact plates based on numerical flow simulation", volume = "17", number = "3", pages = "221-228", url = "https://hdl.handle.net/21.15107/rcub_cer_2216" }
Kozić, M., Ristić, S. S., Katavic, B., Jegdić, B., Prvulović, M., Prokolab, M.,& Linić, S.. (2017). Wear resistance improvement of thermal plant fan mill impact plates based on numerical flow simulation. in Structural Integrity and Life Society for Structural Integrity and Life, Institute for Material Testing., 17(3), 221-228. https://hdl.handle.net/21.15107/rcub_cer_2216
Kozić M, Ristić SS, Katavic B, Jegdić B, Prvulović M, Prokolab M, Linić S. Wear resistance improvement of thermal plant fan mill impact plates based on numerical flow simulation. in Structural Integrity and Life. 2017;17(3):221-228. https://hdl.handle.net/21.15107/rcub_cer_2216 .
Kozić, M., Ristić, Slavica S., Katavic, B., Jegdić, Bore, Prvulović, M., Prokolab, M., Linić, Suzana, "Wear resistance improvement of thermal plant fan mill impact plates based on numerical flow simulation" in Structural Integrity and Life, 17, no. 3 (2017):221-228, https://hdl.handle.net/21.15107/rcub_cer_2216 .