FIELD: thermal, mechanical, metal- working, and construction engineering, and other industries. SUBSTANCE: tube has U-shaped radiating case, recuperator in one line and burner in other formed by set of coaxial pipes; gas combustion in burner is ensured due to double-stage air supply; U-shaped radiating case is made of fire-proof ceramic material and has contactless joint with metal members, that is recuperative line is fixed structure sealed with packing gland and burner line is movable one sealed with bellows and packing gland; hot air flow section between recuperator and burner lines is provided with bellows. Ratio of sectional areas of holes and sectional area of annular outlet duct is 0.6 to 1.0. EFFECT: enhanced operating reliability and safety in wide temperature range. 2 cl, 3 dwg, 1 tbl
| Title | Year | Author | Number |
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RU2192912C1 |
