DEVELOPMENT OF CONCEPTUAL TECHNICAL SOLUTIONS AND METHODS OF THEIR IMPLEMENTATION DURING THE DESIGN OF A DUST COAL STEAM GENERATOR OF SUPER-SUPER CRITICAL PARAMETERS OF STEAM 28 MPA/600 °С/600 °С FOR 300 MW ENERGY UNIT. PART 1.

  • B.B. Rokhman Coal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv
  • N.I. Dunaevska Coal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv
  • V.G. Vifatnyuk Coal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv
Keywords: steam generator, pressure, temperature, boiler, technique, furnace, coal, combustion

Abstract

Increasing efficiency of power plant unit, reducing fuel costs, and CO2, NOx and SOx emissions can be achieved by increasing the pressure and temperature of the steam. Analysis carried out for boilers designed for supercritical steam parameters, showed that the increase in pressure and temperature is directly related to the stresses arising in the metal of the superheater, and, consequently, with the need of using high-temperature alloys. Thus, steam generators can be conventionally divided into three groups: supercritical (SC), super supercritical (SSC) and ultra supercritical (USC). The efficiency of the power units of the USC is 3–4 % higher than the efficiency of the SC units, and the efficiency of the power units of the USC is 6–8 % higher than the efficiency of the SC units. For the manufacture of USC boilers, steels based on nickel alloys are required, which are mainly at the stage of development and testing, while for the production of SSC steam generator, steels are manufactured on an industrial scale, therefore, currently, the best option is the construction of SSC power unites. The first part of the work describes the calculation method, the algorithm and the program with the help of which the design and verification thermal calculations of the SSC 28 MPa/600 °С/600 °С were carried out for a 300 MW power unit at rated loads. Two designs of vortex burners (coiled-blade and blade-blade) with a thermal power of 34.471 MJ/s and productivity (for coal) of 5902 kg/h have been developed. Original technical solutions have been developed to improve the reliability of the live steam output stage and to reduce the surface of the first stage of the reheater. Bibl. 5, Fig. 4, Tab. 1.

Author Biographies

B.B. Rokhman, Coal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv

Doctor of Technical Sciences

N.I. Dunaevska, Coal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv

Doctor of Technical Sciences

References

Mitsubishi Hitachi Power Systems Ltd. Boiler Business and Technology Development. Mitsubishi Heavy Industries Technical Review. 2015. 52 (2). pp. 55–62.

P. J. Maziasz, J. P. Shingledecker, R. W. Swindeman, R. L. Klueh, and N. D. Evans. ‘High Creep-Strength Alloys’, Oak Ridge National Laboratory Fossil Energy Program, Annual Progress Report for Period Ending FY04.

Dongke Zhang Ultra-supercritical Coal Power Plants. Materials, Technologies and Optimisation (2013, Woodhead Publishing). 300 p.

R. Viswanathan, Material Technology for Coal-Fired Power Plants, Advanced Materials & Processes, 2004. 162 (8). pp. 73–76.

Kuznetsov N. V., Mitor V. V., Dubovskiy I.E., Karasina E.S. Teplovoy raschet kotelnyih agregatov (Normativnyiy metod). [Thermal calculation of boiler units (Norma-tive method)]. Moscow : Energiya, 1973. 296 p.

Published
2020-12-20
How to Cite
Rokhman, B., Dunaevska, N., & Vifatnyuk, V. (2020). DEVELOPMENT OF CONCEPTUAL TECHNICAL SOLUTIONS AND METHODS OF THEIR IMPLEMENTATION DURING THE DESIGN OF A DUST COAL STEAM GENERATOR OF SUPER-SUPER CRITICAL PARAMETERS OF STEAM 28 MPA/600 °С/600 °С FOR 300 MW ENERGY UNIT. PART 1. Energy Technologies & Resource Saving, (4), 4-19. https://doi.org/10.33070/etars.4.2020.01