Method for cleaning polluting combustion fumes
AssigneeCinovatec S.A. DE C.V.
InventorGermán CASTAÑEDA FONSECA
Life of this patent
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Abstract
A process for cleaning non-condensable pollutant fumes, produced by a combustion; said system comprises: concentrating the non-condensable polluting fumes; mix the contaminating fumes with an alkaline mixture and water vapor; injecting the above mixture into a post-combustion furnace; incinerating said mixture into the oven; conducting the resulting combustion flow by means of a reaction duct without heat, wherein the solid particles will be joined to the solid particles of the alkaline mixture, leaving the air free; separating the formed agglomerates from the gaseous part; and recovering the precipitated agglomerates.
Claims15
A process for cleaning non-condensable pollutant fumes, produced by a combustion, wherein the process comprises:
- i) concentrate non-condensable polluting fumes;
- ii) mixing the contaminating fumes with an alkaline mixture and steam with the aid of a steam generating apparatus;
- iii) injecting the above mixture into a combustion furnace (35),
- iv) incinerate the mixture in the combustion furnace;
- v) conducting the resulting combustion flow through a duct without heat, where the solid particles that accompany the polluting fumes, will be united to the solid particles of the alkaline mixture, thus cleaning the fumes;
- vi) separating the agglomerates formed in the previous step from the gaseous part with the aid of a solids precipitating apparatus (63);
- where the gaseous part is released into the environment;
- y
- vii) to recover precipitated agglomerates.
The process of the preceding claim, wherein the post-combustion furnace (35) comprises:
- i) a body (36) made of materials resistant to combustion and/or incineration temperatures, for example of refractory brick, the walls of which are externally sheathed with metal sheets (37) and the upper face is open;
- ii) a bell-shaped part (39), with an upper aperture (40), made of metal foil, seals the upper face of the furnace body (36);
- iii) a perforation (45) is provided on one of the side faces of the body (36) for receiving the external heat generated by a source of pollutant fumes covered by a housing (10);
- iv) a duct (15) which is connected in the perforation (45) and a bore (14) having the casing (10), to convey concentrated heat in said casing (10) to the interior of the afterburner (35);
- v) a perforation (47) on another of the side faces of the body (36), to receive the non-condensed polluting fumes, produced combustion;
- and
- vi) a hinged door (46) is provided to seal a fully open side face of the body (36).
The process of the preceding claim, wherein the afterburner (35) further comprises a structure (42), on which said afterburner (35) is placed so that it is at a suitable height and interacts correctly with the others components.
The process of the preceding claim, wherein the structure further comprises means (44) for height regulation.
The process according to the preceding claim, wherein the mixture is a combination of calcium hydroxide (CaOH) and sodium bicarbonate (NaCO2).
The process of the preceding claim, wherein the concentration of calcium hydroxide (CaOH) and sodium bicarbonate (NaCO2) is 3:1.
The process according to the preceding claim, wherein the source of non-condensable contaminating fumes is a combustion/incineration, gasification, thermolysis and/or pyrolysis.
The process of the preceding claim, wherein the source is pyrolysis.
Dependencies are inferred from the claim text.