Boiler startup under conditions of convective heating of the highly reactive coal dust

A. V. Zhuikov, V. A. Kulagin, M. P. Baranova, D. O. Glushkov

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Experimental research of conditions and characteristics of ignition of the pulverized coal (with a particle size of approximately 80 μm) of different-type brown coals (1B, 2B, and 3B) during convective heating by a heated airflow (at a temperature of 425–600°С and velocity of 1–5 m/s) is carried out. The use of low-inertia thermocouples, a high-speed video camera, and dedicated software has made it possible to determine the minimum oxidizer parameters needed for coal dust ignition, and the approximation dependences of a main characteristic of the process under study―ignition delay time―on the air temperature. Results of experimental studies provide a basis for developing an optimal scheme of the boiler startup without heavy oil, which differs from the known schemes by the relatively low energy consumption for fuel-burning initiation. By example of the BKZ 75-39FB boiler, the economic usefulness of applying the boiler startup without heavy oil is shown. This scheme can be implemented using the proposed ignition burner that functions as a part of the direct system of pulverized-fuel preparation.

Original languageEnglish
Pages (from-to)870-875
Number of pages6
JournalThermal Engineering (English translation of Teploenergetika)
Volume63
Issue number12
DOIs
Publication statusPublished - 1 Dec 2016

Keywords

  • boiler
  • boiler startup without heavy oil
  • brown coal
  • heated airflow

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Energy Engineering and Power Technology

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