Fossil-fired continuous-flow steam generator

Details Fossil-fired continuous-flow steam generator Fossil-fired continuous-flow steam generator

F - Mech Eng,Light,Heat,Weapons

22

B

F22B 21/34 (2006.01) F22B 29/06 (2006.01) F22B 37/14 (2006.01)

Patent

CA 2369019

A continuous-flow steam generator (2) has a combustion chamber (4) with evaporator tubes (10) for fossil fuel (B), which is followed on the fuel-gas side, via a horizontal gas flue (6), by a vertical gas flue (8). When the continuous-flow steam generator is in operation, temperature differences in a connecting portion (Z), which comprises the outlet region (34) of the combustion chamber (4) and the inlet region (32) of the horizontal gas flue (6), are to be kept particularly low. For this purpose, of a plurality of evaporator tubes (10) capable of being acted upon in parallel by flow medium (S), a number of evaporator tubes (10) are guided in the form of a loop in the connecting portion (Z).

L'invention concerne un générateur de vapeur instantané (2) qui comporte une chambre de combustion (4) pourvue de tubes évaporateurs (10) pour combustible fossile (B), en aval de laquelle est monté un conduit de gaz vertical (8), par l'intermédiaire d'un conduit de gaz horizontal (6). Pendant le fonctionnement du générateur de vapeur instantané, les différences de températures doivent être maintenues particulièrement faibles dans une partie de liaison (Z) qui comprend la zone de sortie (34) de la chambre de combustion (4) et la zone d'entrée (32) du conduit de gaz horizontal (6). A cet effet, une pluralité de tuyaux évaporateurs (10) sont guidés, en forme de boucle, dans la partie de liaison (Z), par une pluralité de tubes évaporateurs (10) pouvant être alimentés, en parallèle, avec du fluide en écoulement (S).

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