Steam generator, especially waste heat recovery steam...

F - Mech Eng,Light,Heat,Weapons – 01 – K

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F01K 23/10 (2006.01)

Patent

CA 2301524

A first (5, 9) and a second (8) evaporator heating surface are located in an elongate gas flue (2) for hot gas of a steam generator. A first supply line (10) for feed water is throughflow-connected on the inlet side to the first evaporator heating surface (5, 9) whilst the second evaporator heating surface (8) is throughflow-connected on the inlet and the outlet side to a low-pressure drum (7). The low-pressure drum (7) is provided with a second supply line (6) for feed water. The first supply line (10) has a first treatment point (47) and the second supply line (6) a second treatment point (46); each of the two treatment points serves for adding and/or extracting chemicals for water treatment, so that each evaporator heating surface (5, 9, 8) can receive only feed water which is conditioned according to the regulations applying to the said evaporator heating surface.

Dans un conduit de gaz (2) allongé destiné au gaz chaud d'un générateur de vapeur se trouvent une première (5, 9) et une deuxième (8) surface chauffante d'évaporateur. Sur la première surface chauffante d'évaporateur (5, 9) est raccordée côté entrée une première canalisation d'amenée (10) destinée à l'eau d'alimentation, tandis que la deuxième surface chauffante d'évaporateur (8) est raccordée côté entrée et côté sortie à un tambour basse pression (7). Ce dernier est muni d'une deuxième canalisation d'amenée (6) destinée à l'eau d'alimentation. La première canalisation d'amenée (10) comporte un premier point de traitement (47) et la deuxième canalisation d'amenée (6) possède un deuxième point de traitement (46); chacun des deux points de traitement sert à ajouter et ou à enlever des produits chimiques destinés au traitement de l'eau, de sorte que chaque surface chauffante d'évaporateur (5, 9, 8) ne peut recevoir que l'eau d'alimentation conditionnée conformément à la réglementation en vigueur.

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