THERMAL SCIENCE

International Scientific Journal

Konstantin A. Pleshanov

,

Ekaterina G. Khlyst

,

Mikhail N. Zaichenko

,

Kirill V. Sterkhov

DESIGN OF A NATURAL CIRCULATION CIRCUIT FOR 85 MW STEAM BOILER

ABSTRACT
The paper describes research and design of fluidized bed steam boiler natural circulation circuit. The capacity of the drum boiler is 85 MW, superheated steam pressure is 98 bar. There are two variants research results of the designed circulation circuit. The first circulation circuit variant was designed as a complex circuit with a common downcomers and risers for the boiler evaporating screen. In the second variant the flow is separately supplied to and discharged from the evaporator that is divided into independent sections. We have researched and described the influence of heat absorption inequality on the furnace evaporation pads using the Boiler Designer software. We also have calculated main characteristics of the two-phase flow in the evaporation pads and evaluated reliability of the natural circulation. The circulation circuit is optimized from point of view of reliability and metal expenses. Results demonstrate that the specific quantity of metal of complex and simple circuit variants is approximately the same with equal reliability.
KEYWORDS
steam, drum, boiler, natural circulation, Boiler Designer, evaporator, reliability, circulation circuit, calculation, optimization
PAPER SUBMITTED: 2016-10-05
PAPER REVISED: 2016-12-17
PAPER ACCEPTED: 2016-12-21
PUBLISHED ONLINE: 2017-01-14
DOI REFERENCE: https://doi.org/10.2298/TSCI161005320P
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2017, VOLUME 21, ISSUE Issue 3, PAGES [1503 - 1513]
REFERENCES
  1. Lokshin V.A. et al., Standard Methods of Hydraulic Design for Power Boilers, Hemisphere Publishing, New York, USA, 1988.
  2. Pleshanov, K.A., et al., Development of Biofuel Steam and Hot-Water Boilers for Russian Energy Sector Needs, Euro Heat & Power, 13 (2016), 1, pp. 36-40.
  3. Pleshanov, K.A., et al., Combustion of Bark and Wood Waste in the Fluidized Bed Boiler, Thermal Engineering, 63 (2016), 11, pp. 813-818. DOI 10.1134/S0040601516110057
  4. Nagiar, H. M.,et al., Modeling of the buckstay system of membrane walls in watertube boiler construction, Thermal science, 18 (2014), 1, pp. 59-72. DOI 10.2298/TSCI120204174N
  5. Steam/ its generation and use, Ed. by Kitto, J.B. and Stults, S.C. 41 edition, The Babcock & Wilcox company, Barberton, Ohio, USA, 2005.
  6. Belyakov, I.I., Experience Gained from the Operation of a Drum Boiler for a Pressure of 18.5 MPa, Thermal Engineering, 54 (2007), 7, pp. 572-577.
  7. Dvoinishnikov, V.A., et al., The substantiation and choice of basic Solutions on the E-160-3.9-440 boiler for the AO MOSENERGO state power station no. 1 (GES-1), Thermal Engineering, 50 (2003), 12, pp. 994-1001.
  8. Roslyakov, P.V., et al., A study of natural circulation in the evaporator of a horizontal-tube heat recovery steam generator, Thermal Engineering, 67 (2014), 7, pp. 465-472. DOI 10.1134/S004060151407009X
  9. Pleshanov, K.A., et al., Calculating the Dynamic Characteristics of a Boiler-Utilizer at the Novogor'kovskaya Heat and Electric Power Plant, Power Technology and Engineering, 49 (2015), 3, pp. 206-211. DOI 10.1007/s10749-015-0600-8
  10. Bolhàr-Nordenkampf, M., et al., Combustion of clean biomass at high steam parameters of 540°C results from a new 120 MWTH unit, Proceedings, 18th European Biomass Conference, Florence, Italy, Vol. 1 (2010).
  11. Vainikka, P., et al., Trace elements found in the fuel and in-furnace fine particles collected from 80MW BFB combusting solid recovered fuel, Fuel Processing Technology, 105 (2013), pp. 202-211. DOI 10.1016/j.fuproc.2011.06.023
  12. Roslyakov, P.V., et al., Studying the possibility of separate and joint combustion of Estonian shales and oil shale retort gas at thermal power plants, Thermal Engineering, 62 (2015), 10, pp. 691-702. DOI 10.1134/S0040601515100080
  13. Scala, F., Salatino, P., Modelling fluidized bed combustion of high-volatile Solid fuels, Chemical Engineering Science, 57 (2002), pp. 1175-1196.
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Design of a natural circulation circuit for 85 MW steam boiler

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