Patent Number: 
Section: claims

1. A chimney structure comprising:a guide structure defining an opening having a plurality of gaps; anda plurality of chimney partitions including 1 to N chimney partitions concentrically arranged between the plurality of gaps and spaced apart from each other on the guide structure, the 1 to N chimney partitions each defining a curved opening over the opening of the guide structure for providing a fluid flow path therethrough, and N being an integer greater than 1. 2. The chimney structure of claim 1, whereinthe 1 to N chimney partitions each have a tubular shape, andthe 1 to N chimney partitions have different radii. 3. The chimney structure of claim 1, wherein each one of the 1 to N chimney partitions is spaced apart from an adjacent one of the 1 to N chimney partitions by a same distance. 4. The chimney structure of claim 3, wherein a value of the same distance is configured to reduce the formation of Eddy currents if a steam mixture flows through the 1 to N chimney partitions. 5. The chimney structure of claim 1, whereinan upper surface of the guide structure defines M grooves spaced apart from each other,M is an integer greater than or equal to N,parts of the 1 to N chimney partitions are in the M grooves defined by the upper surface of the guide structure. 6. The chimney structure of claim 1, further comprising:a top plate on the 1 to N chimney partitions, whereinthe top plate defines an opening over the curved openings of the 1 to N chimney partitions. 7. The chimney structure of claim 1, further comprising:a plurality of slats between two adjacent chimney partitions among the 1 to N chimney partitions, whereinthe plurality of slats are configured to divide a space between the two adjacent chimney partitions into smaller sections. 8. The chimney structure of claim 7, whereinthe plurality of slats are attached to an inner surface of an outer chimney partition among the two adjacent chimney partitions,the plurality of slats are configured to be positioned toward the inner chimney partition among the two adjacent chimney partitions in order to divide the space between the two adjacent chimney partitions into smaller sections, andthe plurality of slats are configured to be positioned against an inner surface of the outer chimney partition among the two adjacent chimney partitions in order to avoid dividing the space between the two adjacent chimney partitions into smaller sections. 9. The chimney structure of claim 7, whereinthe plurality of slats are attached to the inner chimney partition among the two adjacent chimney partitions,the plurality of slats are configured to be positioned toward the outer chimney partition among the two adjacent chimney partitions in order to divide the space between the two adjacent chimney partitions into smaller sections, andthe plurality of slats are configured to be positioned against the inner chimney partition among the two adjacent chimney partitions in order to avoid dividing the space between the two adjacent chimney partitions into smaller sections. 10. The chimney structure of claim 1, whereinthe 1 to N chimney partitions each have a tubular shape, andeach one of the 1 to N chimney partitions is spaced part from an adjacent one of the 1 to N chimney partitions by a distance that is about equal to an inner diameter of the 1st chimney partition among the 1 to N chimney partitions. 11. The chimney structure of claim 10, whereinthe inner diameter of the 1st chimney partition is about 16 inches,a diameter of the Nth chimney partition is about 30 feet,a height of the 1 to N chimney partitions ranges from about 18 to 22 feet along an axial direction of the 1 to N chimney partitions, andN is greater than or equal to 4 and less than or equal to about 12. 12. The chimney structure of claim 1, whereinthe 1 to N chimney partitions include 2nd to (N−1)th chimney partitions between the 1st and the Nth chimney partitions in sequential order,the 1 to N chimney partitions each have a tubular shape,the 1 to N chimney partitions have different radii, anda separation distance between the 1st chimney partition and the 2nd chimney partition is different than a separation distance between two adjacent chimney partitions among the 2nd to (N−1)th chimney partitions. 13. The chimney structure of claim 1, whereinthe 1 to N chimney partitions include steel, anda thickness of 1 to N the chimney partitions ranges from about 0.25 inches to about 0.50 inches. 14. A reactor comprising:a reactor wall; andthe chimney structure of claim 1 secured to the reactor wall. 15. A chimney structure comprising:a tubular chimney housing having an input opening and an output opening sharing a central axis with the input opening and defining a fluid flow path therethrough; anda tubular partition arranged in and spaced from the tubular chimney housing to provide a central fluid flow path through the tubular partition and a first annular fluid flow path through an annular spacing defined by the tubular chimney housing and the tubular partition;wherein the chimney structure is configured to permit a fluid to flow from an input end to an output end of the tubular chimney housing through both the central fluid flow path and the first annular fluid flow path. 16. A method of manufacturing a chimney structure, comprising:concentrically arranging a plurality of chimney partitions on a guide structure, the guide structure defining an opening having a plurality of gaps,the plurality of chimney partitions including 1 to N chimney partitions concentrically arranged between the plurality of gaps and spaced apart from each other on the guide structure,the 1 to N chimney partitions each defining a curved opening over the opening of the guide structure for providing a fluid flow path therethrough,N being an integer greater than 1. 17. The chimney structure of claim 15, whereinthe tubular partition defines an opening that has a polygonal cross-section, andthe tubular chimney housing has a polygonal cross-section. 18. A chimney structure comprising:a guide structure defining an opening;a plurality of chimney partitions including 1 to N chimney partitions concentrically arranged and spaced apart from each other on the guide structure, the 1 to N chimney partitions each defining a curved opening over the opening of the guide structure, and N being an integer greater than 1; and one ofat least one rod secured to the guide structure,a plurality of divider plates extending through the 1 to N chimney partitions, the divider plates and the 1 to N chimney partitions defining a plurality of curved opening sections, based on sectionally dividing the curved openings of the 1 to N chimney partitions, anda partition structure surrounding the 1 to N chimney partitions, an inner surface of the partition structure defining a round opening, the partition structure including divider plates that divide the round opening into round opening sections, the 1 to N chimney partitions each having a tubular shape, and the 1 to N chimney partitions having different radii. 19. The chimney structure of claim 18, wherein the chimney structure includes the: at least one rod secured to the guide structure. 20. The chimney structure of claim 18, wherein the chimney structure includes the plurality of divider plates extending through the 1 to N chimney partitions, the divider plates and the 1 to N chimney partitions define the plurality of curved opening sections, based on sectionally dividing the curved openings of the 1 to N chimney partitions. 21. The chimney structure of claim 18, wherein the chimney structure includes the partition structure surrounding the 1 to N chimney partitions, the inner surface of the partition structure defines the round opening, the partition structure includes divider plates that divide the round opening into round opening sections, the 1 to N chimney partitions each have the tubular shape, and the 1 to N chimney partitions have different radii. 22. The chimney structure of claim 21, wherein the divider plates are metal sheets, the divider plates include notches corresponding to the 1 to N chimney partitions, and the 1 to N chimney partitions are in the notches of the divider plates.