Device and method for treating flue gases
AssigneeS.A. Lhoist Recherche et Developpement
InventorsKevin De Bois, Donatien Laloux
Life of this patent
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Abstract
Device (10) for injecting powders into a furnace pipe (500), comprising a chamber (230) connected to a peripheral pipe (220) and, on the other hand, to the said furnace pipe via the said peripheral pipe (220), which comprises a first part (221) of diameter DP1, and a second part (222) of diameter DP2, having a downstream end (222a) and intended to be in communication with the furnace pipe, and a powder conveying pipe (120) which has a diameter DT and a downstream end (121), characterized in that the second part of the peripheral pipe has a length L≥the diameter (DP2) of the second part of the peripheral pipe, and in that the diameter (DT) and the diameter (DP2) are connected by the relationship 0<DP2−DT<½ DT.
Claims22
Device for injecting a powdered compound for abatement of pollutants of flue gases into a furnace pipe, said device comprising:
- a chamber connected to a peripheral pipe and arranged to be connected to a first blowing element arranged to blow a peripheral gas into said chamber and into said peripheral pipe, and to said furnace pipe via said peripheral pipe,
- said peripheral pipe comprising a first portion having a diameter DP1, connected to the chamber, and a second portion having a diameter DP2, opposite the first portion, having a downstream end, and intended to be in communication with the furnace pipe,
- a transportation pipe for transporting powdered compound, intended to be connected to a second blowing element arranged to blow a transportation gas into said transportation pipe, simultaneously to the jet of peripheral gas, said transportation pipe having a diameter DT and a downstream end,
- said transportation pipe passing through said first portion of the peripheral pipe concentrically and longitudinally, in such a way that the downstream end of said transportation pipe is located in a secant plane between the first and the second prion of the peripheral pipe,
- wherein said transportation pipe passes through said chamber impermeably, and exits therefrom concentrically to the peripheral pipe inside said peripheral pipe,
- wherein the second portion of the peripheral pipe has a length L greater than or equal to the diameter DP2 of the second portion of the peripheral pipe and in that the diameter DT of the transportation pipe and the diameter DP2 of the second portion of the peripheral pipe are linked by the following relationship:
- 0<DP2−DT<½DT.
Device for injecting a powdered compound for abatement of pollutants of flue gases into a furnace pipe, said device comprising:
- a chamber connected to a peripheral pipe and arranged to be connected to a first blowing element arranged to blow a peripheral gas into said chamber and into said peripheral pipe, and to said furnace pipe via said peripheral pipe,
- said peripheral pipe composing a first portion having a diameter DP1, connected to the chamber, and a second portion having a diameter DP2, opposite the first portion, having a downstream end, and intended to be in communication with the furnace pipe,
- a pipe for transporting powdered compound intended to be connected to a second blowing element arranged to blow a transportation gas into said transportation pipe, simultaneously to the jet of peripheral gas, said transportation pipe having a diameter DT and a downstream end,
- said transportation pipe passing through said first portion of the peripheral pipe concentrically and longitudinally, in such a way that the downstream end of said transportation pipe is located in a secant plane between the first and the second portion of the peripheral pipe, and
- wherein the second portion of the peripheral pipe has a length L greater than or equal to the diameter DP2 of the second portion of the peripheral pipe and in that the diameter DT of the transportation pipe and the diameter DP2 of the second portion of the peripheral pipe are linked by the following relationship;
- wherein the peripheral pipe further comprises a third portion comprising an upstream portion provided with an upstream end and a downstream portion provided with a downstream end, having a diameter DP3 less than the diameter DP2, said upstream end being intended to be connected to the downstream end of the second portion of the peripheral pipe, said downstream end being intended to be connected to the furnace pipe.
Dependencies are inferred from the claim text.