WATER-STEAM ARC HEATER Russian patent published in 2014 - IPC H05B7/18 

FIELD: electricity.

SUBSTANCE: invention is related to the field of electric engineering and namely to electric arc gas heaters (plasma guns) used for receipt of stationary flows of low-temperature gas plasma of different gases, and it may be used in chemical industry and metallurgy, machine engineering and power generation sectors and for environment protection as well. In the water-steam arc heater containing in-series connected and installed along the longitudinal axis an electrode-anode, a ring for working gas delivery and an electrode-cathode, inner surface of the inner electrode-anode and a narrowed part of the output electrode-cathode are covered closely by the adjoining metal tube with low thermal conductivity and thickness of the wall equal to δ=(4÷8)·10^-3m, through which cooling of the inner electrode-anode is made partially, and the narrowed part of the output electrode-cathode. The ratios of the electrode dimensions are as follows: d₁/d₂=1.1÷1.3, l₁/d₁=1.5÷4, l₂/d₂=3÷7, D₁/d₁≥1.5, D₂/d₂≥1.6, where d₁, d₂ are diameters of the narrowed parts (m), D₁, D₂ are diameters of the expanded parts (m), l₁, l₂ are lengths of the narrowed parts (m) of the inner electrode-anode and output electrode-cathode respectively.

EFFECT: increasing operational life of heater.

1 dwg