97/04831 Long-term experience with the non-catalytic denitrification in coal-fired boilers in the Czech Republic: von der Heide, B. et al. VGB Tech. Ver. Grosskraftwerksbetr., 1997, (VGB-TB 315, Power Plant and Environment 1997), 18, 1–23
- Publisher
- Elsevier Science
- Year
- 1997
- Weight
- 190 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0140-6701
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✦ Synopsis
The net plant efficiency and operating strategy of boilers are affected by boiler ash deposits generated during combustion of coal, biomass, black liquor, and energetic materials. Such deposits decrease convective and radiative heat exchange with boiler heat transfer surfaces. Even a small amount of ash on a surface decreases local heat transfer rates by factors of three or more in many cases. In addition, ash deposits represent potential operational problems and boiler maintenance issues, such as plugging, tube wastage (erosion and corrosion), and structural damage. This report relates the chemical and microstructural properties of ash deposits to their physical and transport properties.
Deposit emissivity, thermal condition, tenacity, and strength relate quantity to deposit microstructure and chemical. Data and algorithms illustrating the accuracy and limitations of such relationships are provided. 97104820 Calculating method of the optimum recycle rate for circulating fluidized bed boiler design and operation Luo, C. et al. Ranshao Kexlre YLC Jishu., 1996, 2, (I), 72-77. (In Chinese) The last ten years has seen expansion in the development of circulating fluidized bed (CFB) combustion, due to environmental pollution and shortage of energy. The recycle rate is one of the most important parameters for CFB boiler design and operation. An optimum design method of CFB boiler is proposed, and the model of optimum recycle rate is discussed.