Dampferzeuger, insbesondere Abhitzedampferzeuger und Verfahren zum Betrieb dieses Dampferzeugers

摘要

A first (5,9) and a second evaporator heating surface (8) are arranged in a long stretched-out gas duct (2) for the hot gas pertaining to a steam generator. A first feed-water supply pipe (10) is connected to the input of the first evaporator heating surface (5,9) enabling through-flow. The input and output of the second evaporator heating surface (8) are joined to a low-pressure drum (17) also enabling through-flow. The low-pressure drum is provided with a second feed-water supply pipe (6). The first supply pipe (10) has a first treatment point (47) and the second supply pipe (6) has a second treatment point (46); each treatment point is used to add or remove chemicals for water treatment, so that each evaporator heating surface (8) can only contain feed-water which is conditioned according to the appropriate regulations.