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Abstract <p>The productivity and efficiency of most high-temperature bed processes are determined by the development of mass exchange and mass transfer forces and depend on the formation of nonstationarity in the velocities of the main gas flows. The creation of artificial nonstationarity in the form of a pulsating primary air flow at the burner of a rotary kiln is accompanied by: (1) an increase in the thermal efficiency of the lime shaft cooler, ensuring deeper cooling of the calcined products; (2) when the pulsating gas flow passes through the limestone preheater with an interruption frequency of up to 20 Hz, heat exchange processes are enhanced, reducing the energy costs for their transportation, decreasing the material preheating temperature, the exhaust gas temperature and increasing thermal efficiency; (3) when the gas flow pulsation frequency in the working space of the rotary kiln changes insignificantly, the conditions for the development of flare processes change; (4) when using a blast with a pulsation frequency of up to 20 Hz, there is a reduction in the heat consumption of fuel and preheated air in the kiln, with an increase in the sensible heat of limestone preheating and thermal efficiency.</p>

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Features of Thermal Operation of a Rotating Kiln with the Influence of Primary Air Pulsations on a Two-Wire Burner

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • V. I. Matyukhin,
  • A. V. Bolotov,
  • A. V. Matyukhina

摘要

Abstract

The productivity and efficiency of most high-temperature bed processes are determined by the development of mass exchange and mass transfer forces and depend on the formation of nonstationarity in the velocities of the main gas flows. The creation of artificial nonstationarity in the form of a pulsating primary air flow at the burner of a rotary kiln is accompanied by: (1) an increase in the thermal efficiency of the lime shaft cooler, ensuring deeper cooling of the calcined products; (2) when the pulsating gas flow passes through the limestone preheater with an interruption frequency of up to 20 Hz, heat exchange processes are enhanced, reducing the energy costs for their transportation, decreasing the material preheating temperature, the exhaust gas temperature and increasing thermal efficiency; (3) when the gas flow pulsation frequency in the working space of the rotary kiln changes insignificantly, the conditions for the development of flare processes change; (4) when using a blast with a pulsation frequency of up to 20 Hz, there is a reduction in the heat consumption of fuel and preheated air in the kiln, with an increase in the sensible heat of limestone preheating and thermal efficiency.