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Introduction of Burners with In-Furnace Flue Gas Recirculation at a Power Boiler

  • STEAM BOILERS, POWER PLANT FUELS, BURNER UNITS, AND BOILER AUXILIARY EQUIPMENT
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Abstract

The results of the reconstruction of an E-500-13.8-560 KDT (TPE-430) boiler performed to reduce nitrogen oxide (NOx) emissions are discussed. In this case, a NOx concentration of 119 mg/m3 has been reached only by using new burner devices. It has been demonstrated that the applicable environmental legislation contains a set of measures having a considerable effect on the current and planned business activities of the thermal power industry and power machine building enterprises. A brief description of the boiler is presented. Challenging issues of its operation are considered, and the operating and investment expenditures are analyzed. The thermal design of the boiler is assessed. The available burner devices with ultralow emissions are considered, and their best option has been selected. It has been demonstrated that successful implementation of the project requires special engineering activities to be performed before replacing the burners in the boilers to optimize the design and parameters of the air path. To construct a model of the air path, on-site studies of the air ducts of the TPE-430 boiler were carried out. On the basis of the obtained data, a physical model of the air path was made of plexiglass air. It was blown with cold air whose flow was visualized using helium soap microbubbles. The results of the physical simulation were used to arrange the annular ducts from the manifold to the new burners and to determine location and size of structural members to be installed in air ducts and burner boxes to achieve the required uniformity of the air flow.

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Notes

  1. The boilers are classified by the characteristics of the active combustion zone into seven groups for the selection of measures for environmental protection.

  2. Unfortunately, all GOSTs that comply with the Law on Technical Regulation no. 184-FZ are voluntary or advisory in nature. “Standard values” are set as “process indicators” in the Information-and-Engineering Handbook ITS 38-2017; however, when this paper was prepared, they had not yet been approved by the order of the Ministry of Natural Resources of the Russian Federation.

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Authors and Affiliations

  1. National Research University Moscow Power Engineering Institute, 111250, Moscow, Russia

    N. A. Zroychikov & A. V. Pay

  2. OOO Ecogor, 115280, Moscow, Russia

    D. R. Grigoriev

  3. Zeeco Inc., 74014, Oklahoma, United States

    M. Gamburg

Authors
  1. N. A. Zroychikov
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  2. D. R. Grigoriev
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  3. M. Gamburg
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  4. A. V. Pay
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Corresponding authors

Correspondence to N. A. Zroychikov, D. R. Grigoriev, M. Gamburg or A. V. Pay.

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Translated by T. Krasnoshchekova

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Zroychikov, N.A., Grigoriev, D.R., Gamburg, M. et al. Introduction of Burners with In-Furnace Flue Gas Recirculation at a Power Boiler. Therm. Eng. 68, 865–872 (2021). https://doi.org/10.1134/S0040601521110082

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  • DOI: https://doi.org/10.1134/S0040601521110082

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