Support ring for accommodating a plate-like element in a vessel

1. A vessel for producing SO 3 from SO 2 -containing gas, the vessel comprising:

a plate-like element; and

a bracket disposed on a wall of the vessel and configured to support the plate-like element, the bracket having a supporting surface that is an upper supporting surface curved downward away from the plate-like element in an unloaded state of the vessel or a lower supporting surface curved upward away from the plate-like element in the unloaded state of the vessel.

2. The vessel as recited in claim 1 , wherein the plate-like element is a circular ring, and further comprising a second bracket configured to support the circular ring at an inside portion thereof, the second bracket including a second supporting surface corresponding to the supporting surface of the bracket that is an upper supporting surface curved downward relative to horizontal or a lower supporting surface curved upward relative to horizontal.

3. The vessel as recited in claim 1 , wherein the bracket is a ring extending around the wall of the vessel.

4. The vessel as recited in claim 1 , wherein each of the bracket and the plate-like element include at least one respective through hole for at least one mounting bolt.

5. The vessel as recited in claim 1 , wherein the bracket is welded to the plate-like element.

6. The vessel as recited in claim 1 , wherein the bracket is screwed to the plate-like element.

7. The vessel as recited in claim 1 , further comprising a supporting bar braced against the wall of the vessel, wherein the supporting bar is configured to support the bracket from below.

8. The vessel as recited in claim 1 , further comprising a supporting bar connected to the wall of the vessel, wherein the supporting bar is configured to support the plate-like element from above.

9. The vessel as recited in claim 1 , further comprising a supporting cone braced against the wall of the vessel, wherein the supporting cone is configured to support the bracket from below.

10. The vessel as recited in claim 1 , further comprising a supporting cone connected to the wall of the vessel, wherein the supporting cone is configured to support the plate-like element from above.

11. The vessel as recited in claim 1 , wherein the supporting surface has at least two successive radii of different magnitude along the curve.

12. The vessel as recited in claim 11 , wherein the magnitude of the at least two successive radii decreases along the curve, a radius closest to the wall of the vessel being larger than the radii located further away from the wall.

13. The vessel as recited in claim 11 , wherein the radius closest to the wall of the vessel has a magnitude of from 500 to 900 mm.

14. The vessel as recited in claim 13 , wherein a radius next closest to the wall of the vessel has a magnitude of from 300 to 700 mm.