Energy conservation and emission reduction are the development goals of future industry, and heat exchangers play a vital role in the efficient use of energy. But the fly ash formed by the insufficiently burnt coal powder and other impurities has many negative effects in the waste heat recovery. Tube bundle wear and ash deposition in heating surface are common problems in engineering. To explore the effect of fly ash on heat transfer, a small heat transfer testor was established in laboratory, and the characteristics of fly ash, such as particle concentration, velocity, and particle size were studied in this testor. Based on experimental work, it is helpful to improve the service life of equipment. The summed empirical formula has certain guiding significance for actual engineering production.
Heat transfer coefficient Dusty airflow Fly ash characteristics Ash deposit Experimental study
This is a preview of subscription content, log in to check access.
The author expresses gratitude to the national key research and development program, the research on the integrated control technology of coal-fired boiler pollutants (SO2, NOx, PM) and engineering demonstration (2016YFB0600701).
Lee BE et al (2002) Computational study of fouling deposit due to surface-coated particles in coal-fired power utility boilers. Fuel 81(15):2001–2008CrossRefGoogle Scholar
Pan Y et al (2011) An integrated theoretical fouling model for convective heating surfaces in coal-fired boilers. Powder Technol 210(2):150–156CrossRefGoogle Scholar
Han H et al (2014) A parameter study of tube bundle heat exchangers for fouling rate reduction. Int J Heat Mass Transf 72:210–221CrossRefGoogle Scholar
Sato N et al (2015) Growth and gravity shedding of ash deposition layer in pulverized coal combustors. Fuel Process Technol 134:1–10CrossRefGoogle Scholar
Naganuma H et al (2013) Control of ash deposition in solid fuel fired boiler. Fuel Process Technol 105:77–81CrossRefGoogle Scholar
Nagarajan R et al (2009) Development of predictive model for fly-ash erosion phenomena in coal-burning boilers. Wear 267(1-4):122–128CrossRefGoogle Scholar
Dong M et al (2013) A dynamic model for the normal impact of fly ash particle with a planar surface. Energies 6(8):4288–4307CrossRefGoogle Scholar
Bazzo Edson (2012) Characterization and growth modeling of ash deposits in coal fired boilers. Powder Technol 217:61–68CrossRefGoogle Scholar