Compact burner for an entrained-flow gasifier having no liquid cooling
a gasifier and compact technology, applied in the field of compact burners, can solve the problems of recurring burner repairs, burner tip on the reaction chamber side with limited service life, burner cooling parts that are operated with cooling water and formed as closed pressure chambers, etc., and achieve the effect of eliminating expenditure and reducing stress
Inactive Publication Date: 2017-09-07
SIEMENS AG
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Benefits of technology
The patent text describes a new method for producing burner nozzles using a laser melting process which saves money and allows for better contouring of the nozzle. The design also optimizes the mixing of fuel and oxidizing agent for better conversion. Additionally, the use of sliding guides with sealing at the nozzles eliminates stresses caused by obstructed thermal expansion and eliminates the need for additional measures such as expansion compensators in the media-channel walls.
Problems solved by technology
Mainly due to start-up and shutdown operations, the burner tip on the reaction chamber side has a limited service life.
At the same time, particularly the burner cooling parts that are operated with cooling water and formed as closed pressure chambers require a high maintenance effort with regard to the recurring burner repairs.
The various media to be supplied, such as for example fuel gas, pulverized fuel dust and oxidizing agent, have different temperatures and require structurally complex measures (e.g. corrugated expansion joints) for accommodating the different expansions of the burner channel walls.
Method used
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Embodiment Construction
[0028]Identical elements are denoted by identical designations in the figures.
[0029]In FIG. 1 the basic construction of a media-cooled burner tip is shown, the contact surface (1) of which on the reaction chamber side is reduced. The nozzle parts (2, 3, 4, 5) are formed in such a manner that they are sufficiently cooled by means of a defined flushing gas quantity, such as for example nitrogen, or by an operating medium, such as for example fuel gas or an oxidizing agent. They are no longer parts of a pressure vessel and are adapted in their form to cost-effective production by means of generative processes, such as the SLM process (Selective Laser Melting). The existing material-intensive and time-consuming machining manufacturing from forged parts is reduced to a large extent. The media-induced different thermal expansion of the tubes (6) separating the individual burner channels is possible without hindrance at the sliding guides (7) of the burner nozzles in a stress-free manner a...
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A compact burner for the pressurized gasification of pulverized fuel dust for producing synthesis gas, wherein a plurality of concentric media channels transition into a conical burner tip. The burner tip provides a reduced contact surface on the reaction chamber side. The nozzle components of the burner tip are produced by selective laser melting, which permits a design for cooling by supplied media, such as fuel gas, flushing gas, or oxidation. A sliding guide having an intermediate seal is arranged between the nozzle components of two media channels to equalize temperature-driven linear extensions. The compact burner makes the expense for liquid cooling unnecessary.
Description
CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is the US National Stage of International Application No. PCT / EP2015 / 069412 filed Aug. 25, 2015, and claims the benefit thereof. The International Application claims the benefit of German Application No. DE 102014218219.0 filed Sep. 11, 2014. All of the applications are incorporated by reference herein in their entirety.FIELD OF INVENTION[0002]The invention relates to a compact burner for the pressurized gasification of pulverized fuel dust for producing synthesis gas.BACKGROUND OF INVENTION[0003]In reactors for the entrained-flow gasification of pulverized fuel dust under elevated pressure to produce synthesis gas, pilot burners and main burners that are water-cooled several times on the reaction chamber side are used for supplying all the media. The water cooling processes are provided by pressure chambers, which present toward the reaction chamber an enlarged contact surface for the burner flame and the hot gases from ...
Claims
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IPC IPC(8): F23D14/24F23D14/34F23D14/52F23D14/78
CPCF23D14/24F23D14/78F23D14/34F23D14/48F23D2213/00F23D14/46F23D14/20F23D14/52F23D2214/00F23D2211/00
Inventor DEGENKOLB, DIETMARFU, WEIJUST, TINOKIENER, CHRISTOPH
Owner SIEMENS AG