device for reducing emissions of pollutants in flue gases from combustion plants.

摘要

1. Device for reducing noxious gases during the operation of combustion plants, consisting of reactors (32) operating on a wet or dry basis and their associated regenerative heat exchangers (1) which are used either for cooling and reheating, or else for preheating and recooling, the flue gas stream, in which the storage masses (3) of the regenerative heat exchanger (1) are subdivided (4) concentrically into at least two storage mass regions (3a and 3b) and the heat-transmitting and heat-absorbing media can each be passed in two separate, parallel streams through these storage masses (3, or 3a and 3b), and in which in addition either the storage masses (3, or 3a, 3b) are stationary and lie between rotatable media supply and discharge hoods (5, 6, 7, 8, 13, 14) and their connected media supply and discharge ducts (9, 10, 11, 12), or the storage masses (3, 3a, 3b) are located so that they can rotate between stationary media supply and discharge hoods with corresponding media supply and discharge ducts, characterized in that each storage mass region (3a and 3b) has on one side a connection in the shape of an annular sector to its own media supply hood (6 or 5) and on the other side a media discharge hood (14), also of annular sector shape, is allocated jointly to both storage mass regions (3a and 3b) and lies opposite the media supply hoods (6 and 5), in that furthermore a media discharge hood (7) is allocated to the storage mass region (3a) adjacent to the media supply hood (6) and a media discharge hood (8) is allocated to the storage mass region (3b) adjacent to the media supply hood (5) and each of which said media discharge hoods cover the sections of the storage mass regions (3a and 3b) not covered at any time by the media supply hoods (6 and 5), in that in addition the media discharge hood (14) is surrounded by a media supply hood (13) which covers the sections of both storage mass regions (3a and 3b) which at any time are not covered by the media supply hood (14), and in that at the same time by means of media supply hoods (6 and 5) and/or the media discharge hoods (7 and 8) each of the two parallel streams both of the heat transmitting medium and of the heat absorbing medium can be supplied (6, 5 or 13) as required individually to the associated sections (3a or 3b) of the storage mass (3) or in that the media supply and discharge ducts (9, 10, 11, 12) can be shut off individually as required (flaps 21, 22, 24, 25).