Syngas cooler
A syngas cooler is configured to cool a syngas. The syngas cooler includes a superheater heat exchanger, which further includes a first header configured to receive saturated steam, a second header configured to discharge superheated steam, and a first group of tubes directly coupled to and vertically extending between the first and second headers. Each tube of the first group of tubes includes an outer surface that interfaces with the syngas and a respective length between the first and second headers, and each tube of the first group of tubes does not contact another tube along the respective length to enable a flow of the syngas around each tube's outer surface along its respective length and between each tube.
1. A system, comprising:
a syngas cooler configured to cool a syngas, wherein the syngas cooler comprises:
a superheater heat exchanger, comprising:
a first header configured to receive saturated steam;
a second header configured to discharge superheated steam;
a first plurality of tubes directly coupled to and vertically extending between the first and second headers, wherein each tube of the first plurality of tubes comprises an outer surface that interfaces with the syngas and a respective length between the first and second headers, and each tube of the first plurality of tubes does not contact another tube along the respective length to enable a flow of the syngas around each tube's outer surface along its respective length and between each tube;
a third header configured to receive water;
a fourth header configured to discharge saturated steam; and
a second plurality of tubes directly coupled to and vertically extending between the third and fourth headers, wherein each tube interfaces with the syngas, wherein the superheater heat exchanger and the saturation heat exchanger are located at a same axial location relative to a longitudinal axis of the syngas cooler.
2. The system of claim 1 , wherein the syngas cooler comprises a plurality of superheater heat exchangers and a plurality of saturation heat exchangers, and each superheater heat exchanger of the plurality of superheater heat exchangers is circumferentially disposed relative to the longitudinal axis between a pair of saturation heat exchangers of the plurality of saturation heat exchangers.
3. The system of claim 1 , wherein the superheater heat exchanger and the saturation heat exchanger are disposed radially adjacent each other relative to the longitudinal axis, and a majority of the superheater heat exchanger is radially outward of the saturation heat exchanger relative to the longitudinal axis.
4. The system of claim 1 , wherein the syngas cooler comprises a substantially cylindrical vessel having a top end and a bottom end, and the superheater heat exchanger vertically extends from adjacent the top end to adjacent the bottom end.
5. The system of claim 1 , wherein the syngas cooler comprises a tube cage disposed radially outward of both the superheater heat exchanger and the saturation heat exchanger relative to a longitudinal axis of the syngas cooler.
6. The system of claim 1 , wherein the first plurality of tubes is directly coupled to the first header and the second header in a staggered arrangement.
7. The system of claim 1 , wherein the syngas cooler comprises a radiant syngas cooler.
8. The system of claim 1 , comprising a gasifier coupled to the syngas cooler.
9. The system of claim 1 , comprising an integrated gasification combined cycle system comprising the syngas cooler.
10. A syngas cooler configured to cool a syngas, wherein the syngas cooler comprises:
a plurality of superheater heat exchangers, wherein each superheater heat exchanger comprises:
a first header configured to receive saturated steam;
a second header configured to discharge superheated steam; and
a first plurality of tubes directly coupled to and vertically extending between the first and second headers, wherein each tube of the first plurality of tubes comprises an outer surface that interfaces with the syngas and has a respective length between the first and second headers, and each tube of the first plurality of tubes does not contact another tube along the respective length to enable a flow of the syngas around each tube's outer surface along its respective length and between each tube; and
a plurality of saturation heat exchangers, wherein each saturation heat exchanger, comprises:
a third header configured to receive water;
a fourth header configured to discharge saturated steam; and
a second plurality of tubes directly coupled to and vertically extending between the third and fourth headers, wherein each tube of the second plurality of tubes interfaces with the syngas;
wherein the plurality of superheater heat exchangers and the plurality of saturation heat exchangers are located at a same axial location relative to a longitudinal axis of the syngas cooler.
11. The syngas cooler of claim 10 , wherein each superheater heat exchanger of the plurality of superheater heat exchangers is circumferentially disposed relative to the longitudinal axis between a pair of saturation heat exchangers of the plurality of saturation heat exchangers.
12. The syngas cooler of claim 10 , wherein at least one superheater heat exchanger of the plurality of superheater heat exchangers and at least one saturation heat exchanger of the plurality of saturation heat exchangers are disposed radially adjacent each other relative to the longitudinal axis, and a majority of the at least one superheater heat exchanger is disposed radially outward of the at least one saturation heat exchanger relative to the longitudinal axis.
13. The syngas cooler of claim 10 , wherein each superheater heat exchanger of the plurality of superheater heat exchangers is circumferentially disposed relative to the longitudinal axis between a pair of saturation heat exchangers of the plurality of saturation heat exchangers.
14. The syngas cooler of claim 10 , wherein the syngas cooler comprises a substantially cylindrical vessel having a top end and a bottom end, and both the plurality of superheater heat exchangers and the plurality of saturation heat exchangers vertically extend from adjacent the top end to adjacent the bottom end.
15. A syngas cooler configured to cool a syngas, wherein the syngas cooler comprises:
a plurality of superheater heat exchangers, wherein each superheater heat exchanger comprises:
a first header configured to receive saturated steam;
a second header configured to discharge superheated steam; and
a first plurality of tubes directly coupled to and vertically extending between the first and second headers, wherein each tube of the first plurality of tubes comprises an outer surface that interfaces with the syngas and a respective length between the first and second headers, and each tube of the first plurality of tubes does not contact another tube along the respective length to enable a flow of the syngas around each tube's outer surface along its respective length and between each tube;
a plurality of saturation heat exchangers, wherein each saturation heat exchanger, comprises:
a third header configured to receive water;
a fourth header configured to discharge saturated steam; and
a second plurality of tubes directly coupled to and vertically extending between the third and fourth headers, wherein each tube of the second plurality of tubes interfaces with the syngas;
wherein the plurality of superheater heat exchangers and the plurality of saturation heat exchangers are located at different axial locations relative to a longitudinal axis of the syngas cooler; and
a tube cage disposed radially outward of both the plurality of superheater heat exchangers and the plurality of saturation heat exchangers relative to the longitudinal axis.
16. The syngas cooler of claim 15 , wherein the tube cage comprises a conical section axially disposed relative to the longitudinal axis between the plurality of superheater heat exchangers and the plurality of saturation heat exchangers.