Abstract
To develop a method of controlling the deposit tube surface temperature, the rules of deposition and fouling on the fireside, and the influence factors of the surface distribution were determined through experiments and theoretical calculations. The surface temperature distribution of a clean tube was compared with that of a deposit tube. Through theoretical calculations, the influence factors of the deposit tube surface temperature were evaluated. Based on the investigation, surface temperature control technology applicable to a super- heater was proposed and the feasibility of this heater was determined. A bimodal distribution was obtained when the temperature distribution of the deposit tube was plotted as a function of the angle, whereas a unimodal distribution was obtained for the clean tube. The results revealed that the heat exchange tube surface temperature is most effectively controlled by controlling the flue gas temperature. Prior to the development of higher performance materials (compared with conventional materials), surface temperature control technology can be used to ensure that the super-heater surface temperature lies below the allowable temperature of existing super-heater materials.
References
1.
Ullah
, H.
, Liu
, G.
, Yousaf
, B.
, Ubaid
, M.
, Abbas
, Q.
, Zhou
, C.
, and Rashid
, A.
, 2018
, “Hydrothermal Dewatering of Low-Rank Coals: Influence on the Properties and Combustion Characteristics of the Solid Products
,” Energy
, 158
, pp. 1192
–1203
. 10.1016/j.energy.2018.06.0522.
Yohanes
, K.
, Kim
, J.
, Lim
, H.
, Kim
, S.
, and Jeon
, C.
, 2016
, “Prediction of Unburned Carbon and NO Formation From Low-Rank Coal During Pulverized Coal Combustion : Experiments and Numerical Simulation
,” Fuel
, 185
, pp. 478
–490
. 10.1016/j.fuel.2016.08.0263.
Robinson
, A. L.
, Junker
, H.
, and Baxter
, L. L.
, 2002
, “Pilot-Scale Investigation of the Influence of Coal-Biomass Cofiring on Ash Deposition
,” Energy Fuels
, 16
(2
), pp. 343
–355
. 10.1021/ef010128h4.
Valmari
, T.
, Lind
, T. M.
, Kauppinen
, E. I.
, Sfiris
, G.
, Nilsson
, K.
, and Maenhaut
, W.
, 1999
, “Field Study on Ash Behavior During Circulating Fluidized-Bed Combustion of Biomass. 2. Ash Deposition and Alkali Vapor Condensation
,” Energy Fuels
, 13
(2
), pp. 390
–395
. 10.1021/ef98008665.
Li
, M. J.
, Tang
, S. Z.
, Wang
, F. l.
, Zhao
, Q. X.
, and Tao
, W. Q.
, 2017
, “Gas-Side Fouling, Erosion and Corrosion of Heat Exchangers for Middle/Low Temperature Waste Heat Utilization: A Review on Simulation and Experiment
,” Appl. Therm. Eng.
, 126
, pp. 737
–761
. 10.1016/j.applthermaleng.2017.07.0956.
Bryers
, R. W.
, 1996
, “Fireside Slagging, Fouling, and High-Temperature Corrosion of Heat-Transfer Surface Due to Impurities in Steam-Raising Fuels
,” Prog. Energy Combust. Sci.
, 22
(1
), pp. 29
–120
. 10.1016/0360-1285(95)00012-77.
Yang
, X.
, Ingham
, D.
, Ma
, L.
, Zhou
, H.
, and Pourkashanian
, M.
, 2017
, “Understanding the Ash Deposition Formation in Zhundong Lignite Combustion Through Dynamic CFD Modelling Analysis
,” Fuel
, 194
, pp. 533
–543
. 10.1016/j.fuel.2017.01.0268.
Miles
, T. R.
, Miles
, T. R.
, Baxter
, L. L.
, and Bryers
, R. W.
, 1996
, “Boiler Deposits From Firing Biomass Fuels
,” Biomass Bioenergy
, 10
(2–3
), pp. 125
–138
. 10.1016/0961-9534(95)00067-49.
Han
, J.
, Yu
, D.
, Wu
, J.
, Yu
, X.
, Liu
, F.
, Wang
, J.
, and Xu
, M.
, 2019
, “Fine Ash Formation and Slagging Deposition During Combustion of Silicon-Rich Biomasses and Their Blends With a Low-Rank Coal
,” Energy Fuels
, 33
(7
), pp. 5875
–5882
. 10.1021/acs.energyfuels.8b0419310.
Wu
, J.
, Yu
, D.
, Zeng
, X.
, Yu
, X.
, Han
, J.
, Wen
, C.
, and Yu
, G.
, 2018
, “Ash Formation and Fouling During Combustion of Rice Husk and Its Blends With a High Alkali Xinjiang Coal
,” Energy Fuels
, 32
(1
), pp. 416
–424
. 10.1021/acs.energyfuels.7b0229811.
Rezaei
, H. R.
, Gupta
, R. P.
, Bryant
, G. W.
, Hart
, J. T.
, Liu
, G. S.
, Bailey
, C. W.
, Wall
, T. F.
, Miyamae
, S.
, Makino
, K.
, and Endo
, Y.
, 2000
, “Thermal Conductivity of Coal Ash and Slags and Models Used
,” Fuel
, 79
(13
), pp. 1697
–1710
. 10.1016/S0016-2361(00)00033-812.
Anderson
, D. W.
, Viskanta
, R.
, and Incropera
, F. P.
, 1987
, “Effective Thermal Conductivity of Coal Ash Deposits at Moderate to High Temperatures
,” ASME J. Eng. Gas Turbines Power
, 109
(2
), pp. 215
–221
. 10.1115/1.324002713.
Dai
, B. Q.
, Low
, F.
, De Girolamo
, A.
, Wu
, X.
, and Zhang
, L.
, 2013
, “Characteristics of Ash Deposits in a Pulverized Lignite Coal-Fired Boiler and the Mass Flow of Major Ash-Forming Inorganic Elements
,” Energy Fuels
, 27
(10
), pp. 6198
–6211
. 10.1021/ef400930e14.
Nielsen
, H. P.
, Baxter
, L. L.
, Sclippab
, G.
, Morey
, C.
, Frandsen
, F. J.
, and Dam-Johansen
, K.
, 2000
, “Deposition of Potassium Salts on Heat Transfer Surfaces in Straw-Fired Boilers: A Pilot-Scale Study
,” Fuel
, 79
(2
), pp. 131
–139
. 10.1016/S0016-2361(99)00090-315.
Kar
, S. K.
, Rosendahl
, L. A.
, and Baxter
, L. L.
, 2006
, “Towards a CFD-Based Mechanistic Deposit Formation Model for Straw-Fired Boilers
,” Fuel
, 85
(5-6
), pp. 833
–848
. 10.1016/j.fuel.2005.08.01616.
Garba
, M. U.
, Ingham
, D. B.
, Ma
, L.
, Degereji
, M. U.
, Pourkashanian
, M.
, and Williams
, A.
, 2013
, “Modelling of Deposit Formation and Sintering for the Co-Combustion of Coal With Biomass
,” Fuel
, 113
, pp. 863
–872
. 10.1016/j.fuel.2012.12.06517.
Yang
, X.
, Ingham
, D.
, Ma
, L.
, and Troiano
, M.
, 2019
, “Prediction of Particle Sticking Efficiency for Fly Ash Deposition at High Temperatures
,” Proc. Combust. Inst.
, 37
(3
), pp. 2995
–3003
. 10.1016/j.proci.2018.06.03818.
Huang
, Q.
, Li
, S.
, Shao
, Y.
, Zhao
, Y.
, and Yao
, Q.
, 2019
, “Dynamic Evolution of Impaction and Sticking Behaviors of Fly Ash Particle in Pulverized Coal Combustion
,” Proc. Combust. Inst.
, 37
(4
), pp. 4419
–4426
. 10.1016/j.proci.2018.06.03519.
Gopan
, A.
, Yang
, Z.
, and Axelbaum
, R. L.
, 2019
, “Predicting Particle Deposition for Flow Over a Circular Cylinder in Combustion Environments
,” Proc. Combust. Inst.
, 37
(4
), pp. 4427
–4434
. 10.1016/j.proci.2018.06.22020.
Li
, G.
, Wang
, C.
, Yan
, Y.
, Jin
, X.
, Liu
, Y.
, and Che
, D.
, 2016
, “Release and Transformation of Sodium During Combustion of Zhundong Coals
,” J. Energy Inst.
, 89
(1
), pp. 48
–56
. 10.1016/j.joei.2015.01.01121.
Zhang
, X.
, Zhang
, H.
, and Na
, Y.
, 2015
, “Transformation of Sodium During the Ashing of Zhundong Coal
,” Procedia Eng.
, 102
, pp. 305
–314
. 10.1016/j.proeng.2015.01.14722.
Wang
, X.
, Xu
, Z.
, Wei
, B.
, Zhang
, L.
, Tan
, H.
, Yang
, T.
, Mikulčić
, H.
, and Duić
, N.
, 2015
, “The Ash Deposition Mechanism in Boilers Burning Zhundong Coal With High Contents of Sodium and Calcium: A Study From Ash Evaporating to Condensing
,” Appl. Therm. Eng.
, 80
, pp. 150
–159
. 10.1016/j.applthermaleng.2015.01.05123.
Yang
, S.
, and Tao
, W.
, 2006
, Heat Transfer
, 4th ed., Higher Education Press
, Beijing
.24.
Xiaoling Mao
, P. W.
, 2006
, “Evaluation of Super 304H and XA704 Tubes for Ultra Supercritical Boiler
,” Dongfang Electric Rev.
, 20
(3
), pp. 31
–36
.25.
Zhou
, Q.
, 2013
, Principles of Boiler
, 3rd ed., China Electric Power Press
, Beijing
.26.
Phongphiphat
, A.
, Ryu
, C.
, Yang
, Y. B.
, Finney
, K. N.
, Leyland
, A.
, Sharifi
, V. N.
, and Swithenbank
, J.
, 2010
, “Investigation Into High-Temperature Corrosion in a Large-Scale Municipal Waste-to-Energy Plant
,” Corros. Sci.
, 52
(12
), pp. 3861
–3874
. 10.1016/j.corsci.2010.07.03227.
Raask
, E.
, 1985
, Mineral Impurities in Coal Combustion: Behavior, Problems, and Remedial Measures
, Taylor & Francis
, London
.28.
Iseda
, A.
, Okada
, H.
, Semba
, H.
, and Igarashi
, M.
, 2007
, “Long Term Creep Properties and Microstructure of SUPER304H, TP347HFG and HR3C for A-USC Boilers
,” Energy Mater.
, 2
(4
), pp. 199
–206
. 10.1179/174892408X382860Copyright © 2021 by ASME
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