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<p>The optimal solution for the dehydration of magnesium chloride MgCl<sub>2</sub>·6H<sub>2</sub>O or carnallite KCl·MgCl<sub>2</sub>· 6H<sub>2</sub>O crystalline hydrates is the removal of four water molecules at low temperatures to obtain solid bi-hydrous unhydrolyzed salts and their subsequent melting with simultaneous blowing of the melt with HCl-containing gases. A simple and efficient method of producing HCl-containing gases is to burn CH<sub>4</sub> methane in a mixture of chlorine and air in an immersion burner. In order to maximize the hydrogen chloride content of the combustion products, air is metered in an amount that ensures the oxidation of methane carbon only to carbon monoxide. Depending on the flare core temperature, carbon dioxide and particulate carbon (soot) were present in the combustion products. The CO/CO<sub>2</sub> ratio in the combustion products corresponds to the Boudouard’s equilibrium, and at the core temperature of the combustion plume, <i>T</i> ≥ 1073&#xa0;K, this ratio is &gt; 60, and the soot was practically absent. The adiabatic combustion temperature of the mixture is <i>T</i><sub>ad</sub> ~ 2300&#xa0;K, so, by reducing the heat loss, this condition is satisfied. The normal combustion velocities of the mixture of methane, chlorine and air are in the range of 0.45–0.85&#xa0;m/s, decreasing with increasing air dosage, and their ignition temperatures were in the range of <i>T</i> = 500–550&#xa0;K. An immersion burner was designed with separate feed of methane and oxidants (Cl<sub>2</sub> + air) into the combustion chamber, the latter being made in the form of a diffuser.</p>

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Development of an Immersion Burner for the Production of Hydrogen Chloride and Its Use in the Technology of MgCl2 Contained Melts

  • 期刊论文

  • 发表日期：

    2025年7月23日

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  • Dmitry Pruttskov,
  • Nikolai Krivoruchko,
  • Alexey Kirichenko

摘要

The optimal solution for the dehydration of magnesium chloride MgCl2·6H2O or carnallite KCl·MgCl2· 6H2O crystalline hydrates is the removal of four water molecules at low temperatures to obtain solid bi-hydrous unhydrolyzed salts and their subsequent melting with simultaneous blowing of the melt with HCl-containing gases. A simple and efficient method of producing HCl-containing gases is to burn CH4 methane in a mixture of chlorine and air in an immersion burner. In order to maximize the hydrogen chloride content of the combustion products, air is metered in an amount that ensures the oxidation of methane carbon only to carbon monoxide. Depending on the flare core temperature, carbon dioxide and particulate carbon (soot) were present in the combustion products. The CO/CO2 ratio in the combustion products corresponds to the Boudouard’s equilibrium, and at the core temperature of the combustion plume, T ≥ 1073 K, this ratio is > 60, and the soot was practically absent. The adiabatic combustion temperature of the mixture is Tad ~ 2300 K, so, by reducing the heat loss, this condition is satisfied. The normal combustion velocities of the mixture of methane, chlorine and air are in the range of 0.45–0.85 m/s, decreasing with increasing air dosage, and their ignition temperatures were in the range of T = 500–550 K. An immersion burner was designed with separate feed of methane and oxidants (Cl2 + air) into the combustion chamber, the latter being made in the form of a diffuser.