USE OF THE REBURNING TECHNOLOGY WITH BIOMASS PYROLYSIS PRODUCTS AS A REBURNING FUEL TO REDUCE EMISSIONS OF NITROGEN OXIDES FROM TPP 312 BOILER


  • S.G. Kobzar Institute of Engineering Thermophysics of the National Academy of Sciences of Ukraine
  • A.A. Khalatov Institute of Engineering Thermophysics of the National Academy of Sciences of Ukraine
Keywords: biomass, pyrolysis gas, coal combustion, nitrogen oxides, nitrogen oxides reduction

Abstract

In Ukraine, a three-stage coal combustion system fueled by a natural gas as a reburning fuel for nitrogen oxides emission reduction was mounted on Unit № 4 of the Ladyzhyn TPP. This system was developed in cooperation with Combustion Engineering (USA), VTI (Russia) and the Gas Institute of the National Academy of Sciences of Ukraine and was assembled by the Ladyzhyn TPP staff in 1992. The test runs of this system had confirmed the effectiveness of this method of reducing emissions of nitrogen oxides into the atmosphere (up to 50%).Unfortunately, due to the high price of natural gas and the introduction of limits on its use, currently the use of natural gas as a fuel for reburning is impossible. One of the possible ways to reduce emissions of nitrogen oxides from the coal-fired boiler TPP 312 is the operation of Reburning technology with the biomass pyrolysis product as reburning fuel.

The aim of the work was to evaluate the possibility of the application the biomass pyrolysis products as a reburning fuel in Reburning technology to reduce nitrogen oxides from the coal-fired boiler TPP 312. For this purpose, a detailed computer model of a standard TPP 312 boiler and a TPP 312 boiler with a coal reburning combustion system was developed and built.

The study of the operation the Reburning coal combustion system, which is mounted on the unit №4 DTEK Ladyzhynska TPP, on the design parameters of the operation for the boiler load of 280 MWe was carried out. It was determinate that the supply of reburning fuel at 12% of the total heat capacity of the boiler gives a good level of the reduction of nitrogen oxides (up to 25%), provides no slag conditions for superheater pipes and does not lead to increase of the fuel losses with unburnt carbon.

References

1. Mospan Yu.M., Lisovoy V.G. Results of the implementation of a three-stage fuel combustion scheme at the TPP 312 boiler at Ladyzhinskaya GRES // First American-Ukrainian Conference "Protection of atmospheric air from hazardous emissions from thermal power plants", September 9-10, 1996, Kiev., P. 84 - 88. (Rus)
2. Kobzar SG, Khalatov A.A. Determination of zones of increased erosion of furnace screens depending on the load mode of the boiler CCI 312 Ladyzhynska TPP// Promyshlennaya teplotehnika [Industrial Heat Engineering]. 2011. 33, № 4. P. 55-62. (Ukr.)
3. Kobzar SG, Khalatov AA. Determination of the efficiency of reducing emissions of nitrogen oxides by a system of step-by-step combustion of a boiler of coal TPP-312 of block # 6 of DTEK Ladyzhinsk TPP // Bulletin of NTUU KhPI. Series: Power and heat engineering processes and equipment. 2014 # 13 (1056). P.85-91 (Ukr.)
4. Reducing the erosion of furnace screens by controlling the structure of the flow in the volume of the furnace boiler TPP-312 / Kobzar SG, Khalatov AA // in the book. Problems of resource and safety of structures, structures and machines: Collection of scientific articles according to the results obtained in 2010-2012 - Kyiv: Institute of Electric Welding. Є.О. Paton of the National Academy of Sciences of Ukraine, 2012. - 612 pp. / P. 279 - 288. (Ukr.)
5. Kobzar, S., & Khalatov, A.. The investigation of the efficiency of the nitrogen oxides reduction by advanced reburning method application with the coal dust as a reburning fuel. Thermophysics and Thermal Power Engineering, 2017, 39(5), 91-96. https://doi.org/10.31472/ihe.5.2017.15 (Ukr.)
6. Kobzar, S., & Khalatov, A. Application of the biomass pyrolisis products as a reburning fuel for nitrogen oxides reduction: testing the chemical kinetics mechanism. Thermophysics and Thermal Power Engineering, 2020, 42(2), 92-98. https://doi.org//10.31472/ttpe.2.2020.10 (Ukr.)

Abstract views: 61
PDF Downloads: 84
Published
2021-03-04
How to Cite
Kobzar, S., & Khalatov, A. (2021). USE OF THE REBURNING TECHNOLOGY WITH BIOMASS PYROLYSIS PRODUCTS AS A REBURNING FUEL TO REDUCE EMISSIONS OF NITROGEN OXIDES FROM TPP 312 BOILER. Thermophysics and Thermal Power Engineering, 43(1), 82-88. https://doi.org/https://doi.org/10.31472/ttpe.1.2021.10
Section
Fuel Utilization and Burning, Heat Power Units, Ecology

Most read articles by the same author(s)