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AssigneeMesser Griesheim GmbH
InventorsGerhard Gross, Paul Ludwig, Diana Wassmann, Hans-Peter Theis
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According to a conventional method for incinerating organic waste material, a fluidization device causes an oxygenous fluidizing gas to flow through the waste material, which is located in an incineration chamber, from underneath while forming a fluidized panicle layer and the waste material is incinerated. The resulting flue gas is withdrawn via an open space situated above the particle layer and is subjected to a secondary incineration in a secondary reaction zone or secondary incineration chamber. Expanding upon the prior art, the aim of the invention is enable a high throughput for the incineration material while resulting in a low level of nitrogen oxide production, and to increase the productivity for the incineration of organic waste material. To these ends, the invention provides that the fluidized particle layer (3) is concentrated with oxygen in such a manner that a mean oxygen content ranging from 0-3 vol. % is set in the open space (6).
Process for the incineration of organic waste, in which the waste material in an incineration chamber is flown through from below by an oxygen containing fluidization gas by way of a fluidization device, whereby a fluidized particle layer is formed and the waste material is incinerated, and flue gas generated is withdrawn by way of an open space above the particle layer and combusted in a in a post-incineration reaction zone or post-incineration combustion chamber, characterized in that the fluidized particle layer (3) is enriched with oxygen, whereby a mean oxygen content in the range of 0 to 3% by volume occurs in the open space (6).
Process according to one of the preceding claims, characterized in that oxygen is fed to the fluidized particle layer (3) in a second feed zone (16) above the fluidization device (2).
Process according to one of the preceding claims, characterized in that the oxygen content in the open space (6) is continuously measured and a mean determined from the measurements, and that the feed of oxygen into the fluidized particle layer (3) and/or the feed or the organic waste (7) into the incineration chamber are controlled by way of the mean.
Process according to one of the preceding claims, characterized in that at least a part of the fluidization gas (4) is formed by recirculated flue gas (23).
Process according to one of the preceding claims, characterized in that uncombusted, solid or gaseous fuels in the flue gas are combusted in a post-incineration combustion zone (13) or a post-incineration combustion chamber together with a secondary fuel (8) with added secondary air (9), whereby for the maintaining of a preset minimum oxygen content in the flue gas (12) the flue gas (12) is enriched with secondary oxygen (15) or with an oxygen containing gas with at least 80% by volume oxygen.
Process for the incineration of organic waste, in which the waste material in an incineration chamber is flown through from below by an oxygen containing fluidization gas by way of a fluidization device, whereby a fluidized particle layer is formed and the waste material is incinerated, and flue gas generated is withdrawn by way of an open space above the particle layer and combusted in a in a post-incineration reaction zone or post-incineration combustion chamber, characterized in that secondary oxygen is fed into the post-incineration combustion zone (13) or post-incineration combustion chamber in such a way that an oxygen content of at least 6% by volume occurs in the flue gas (12) behind the post-incineration combustion zone (13) or post-incineration combustion chamber.
Dependencies are inferred from the claim text.