Computer system for fouling assessment in coal-fired utility boilers

• Autorzy: Taler J. , Trojan M. , Taler D.
• Języki publikacji: EN

Abstrakty

EN

The computer based boiler performance system, presented in the paper, has been developed to provide a direct and quantitative assessment of furnace and convective surface cleanliness. Measurements of temperatures, pressures, flows, and gas analysis data are used to perform heat transfer analysis in the boiler furnace and evaporator. Power boiler efficiency is calculated by an indirect method. The on-line calculation of a combustion chamber allows for an on-line heat flow rate determination, which is transferred to the boiler evaporator. Based on the energy balance for the boiler evaporator, superheated steam mass flow rate is calculated taking into the account water flow rate in attemperators. Comparing the calculated and measured superheated steam mass flow rate, the average slagging factor for a combustion chamber wall is determined in the on-line mode. Sootblower sequencing can be optimized based on actual cleaning requirements rather than on fixed time cycles contributing to lowering of the medium usage in sootblowers and increasing of the water-wall lifetime.

Słowa kluczowe

EN

boiler; fouling; performance monitoring; Sootblower

PL

kocioł; monitorowanie wydajności; przegrzewacz; Superheater; zanieczyszczenie; zdmuchiwacz sadzy

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2009
• Tom: Vol. 30, no. 2
• Strony: 59--76
• Opis fizyczny: Bibliogr. 7 poz.,Rys., tab., wykr., wz.,

Twórcy

autor

Taler J.

autor

Trojan M.

autor

Taler D.

• Cracow University of Technology, Department of Power Plant Machinery, Institute of Process and Power Engineering, Al. Jana Pawia II 37, 31-864 Cracow, Poland,

Bibliografia

• [1] LITTLER D.J. (Editor): Modern Power Station Practice, Volume G: Station Operation and Maintenance, Pergamon Press, Oxford 1991.
• [2] STULTZ S. C. and KITTO J. B. (Editors): Steam/its generation and use, The Babcock & Wilcox Company, Baberton, Ohio, USA 1992.
• [3] BREEDING CH., SCHMIT J. and ZHUANG H.: Ash measurement at NRG Huntley using high temperature strain gauges, ASME Power, April 5-7, 2005, Chicago, PWR2005-50203, 1-8.
• [4] TALER J. and TALER D.: Tubular type heat flux meter for monitoring internal scale deposits in large steam boilers, Heat Transfer Engineering 2007, Vol. 28, No. 3, 230-239.
• [5] TALER J., WĘGLOWSKI B., ZIMA W, DUDA P., GRĄDZIEL S., SOBOTA T., CEBULA A. and TALER D.: Computer system for monitoring power boiler operation, Proc. IMechE, Part A: J. Power and Energy, 222(2008), 13-24.
• [6] TALER J.: Determination of local heat transfer coefficient from the solution of the inverse heat conduction problem, Forschung im Ingenieurwesen, 71(2007), 69-78.
• [7] KUZNETSOV N. V., MITOR V.V., DUBOVSKIJ I.E. and KARASINA E.S. (Editors): Standard Methods of Thermal Design for Power Boilers, Central Boiler and Turbine Institute, Energija, Moscow 1973, (in Russian).