GAS OUTLET SHAFT OF CHIMNEY Russian patent published in 2003 - IPC

FIELD: civil engineering, ferrous and non- ferrous metallurgy, chemical industry. SUBSTANCE: invention is related to design of exhaust gas outlet shafts of chimneys. Gas outlet shaft of chimney includes ring sections with form-forming structure made up of set of supporting stringers attached to joining ring frames. Ring sections are made of composite fibrous material. Supporting stringers are additionally attached to form-forming ring frames, form-forming structure is lined on the inside with the use of multilayer glass fiber jacket which thickness ensures temperature difference between hot surface passed over by stack gases and surface contacting power set to value safe for structural material of stringer and frame members of form-forming structure. Joining frames of structure are fastened together by means of at least three equidistant outer centering stringers protruding above outer diameter of joining frames to form ventilation duct between gas outlet and bearing shafts of chimney and bulging out with their ends beyond face cuts of joining frames to center joined adjacent ring sections of gas outlet shaft. EFFECT: simplified design, prolonged service life, chemical and thermal resistance of gas outlet shaft, reduced usage of materials and shortened time of its erection. 10 cl, 4 dwg