Gasification cooling system having seal

1. A system, comprising:

a gasification cooling system comprising:

a housing having an inlet, an outlet, and an interior between the inlet and the outlet, wherein the interior comprises a throat adjacent the inlet, and the throat expands in a flow direction from the inlet toward the outlet to define a gas passage;

a first plurality of thermally insulative bricks disposed about the gas passage;

a second plurality of thermally insulative bricks disposed about the first plurality of thermally insulative bricks;

a seal disposed in the throat of the housing around the second plurality of thermally insulative bricks, wherein the seal comprises a bellows having alternating ribs and grooves, and a thermally insulative material conforming to the alternating ribs and grooves of the bellows;

a thermally insulative liner disposed between the second plurality of thermally insulative bricks and the seal; and

a heat shield comprising thermally resistant material, wherein the heat shield is disposed between the thermally insulative liner and the thermally insulative material.

2. The system of claim 1 , wherein the bellows comprises an annular wall having an alternating diameter that radially increases and decreases in an alternating manner along the flow direction to define the alternating ribs and grooves.

3. The system of claim 1 , the thermally insulative material extends directly along a wall of the alternating ribs to fill the space within the ribs.

4. The system of claim 1 , wherein an upper and a lower axial face of each brick of the second plurality of thermally insulative bricks comprises an annular protrusion, an annular groove, and a radial abutment between the annular protrusion and the annular groove.

5. The system of claim 4 , wherein an interlocking interface is formed between axial ends of adjacent bricks when the annular protrusions and grooves of adjacent bricks are received by one another.

6. The system of claim 2 , wherein the bellows comprises a base diameter, and the alternating diameter radially increases and decreases both greater than and less than the base diameter.

7. The system of claim 2 , wherein the bellows comprises a base diameter, and the alternating diameter radially increases and decreases only greater than the base diameter.

8. The system of claim 2 , wherein the bellows comprises a base diameter, and the alternating diameter radially increases and decreases only less than the base diameter.

9. The system of claim 1 , wherein the bellows is metal, and the bellows is configured to expand and contract along the flow direction.

10. The system of claim 1 , wherein the gasification cooling system comprises heat exchanger tubing disposed downstream in the flow direction from the annular seal inside of the housing.

11. The system of claim 1 , wherein the second plurality of thermally insulative bricks is axially staggered relative to the first plurality of thermally insulative bricks.

12. A system, comprising:

a gasification cooling system comprising:

a housing comprising a gas passage extending in a flow direction lengthwise along an axial axis of the housing;

a first plurality of thermally insulative bricks disposed circumferentially about the gas passage and the axial axis of the housing;

a second plurality of thermally insulative bricks disposed circumferentially about the first plurality of thermally insulative bricks and the axial axis of the housing, and comprising an interlocking interface between axial ends of adjacent bricks disposed along the axial axis of the housing to block radial movement between adjacent bricks along a radial axis of the housing, wherein the radial axis extends in a radial direction relative to the axial axis of the housing;

a bellows seal disposed about the second plurality of thermally insulative bricks; and

a plurality of heat exchanger tubes disposed downstream from the bellows seal, wherein the bellows seal is configured to expand and contract in response to thermal contraction or expansion of the plurality of heat exchanger tubes.

13. The system of claim 12 , wherein the bellows seal comprises bellows having alternating ribs and grooves, and a thermally insulative material conforming to the alternating ribs and grooves of the bellows.

14. The system of claim 12 , wherein the second plurality of thermally insulative bricks is axially staggered relative to the first plurality of thermally insulative bricks.

15. The system of claim 12 , wherein the gasification cooling system comprises a thermally insulative liner disposed about the second plurality of thermally insulative bricks.

16. The system of claim 15 , wherein the gasification cooling system comprises a thermally insulative material disposed between the thermally insulative liner and the bellows seal.

17. The system of claim 12 , wherein an upper and a lower axial face of each brick of the second plurality of thermally insulative bricks comprises an annular protrusion, an annular groove, and a radial abutment between the annular protrusion and the annular groove, and wherein when the interlocking interface is formed between axial ends of adjacent bricks, the annular protrusions and grooves of adjacent bricks are received by one another to form the interlocking interface.

18. A system, comprising:

a gasification cooling system comprising:

a housing comprising a gas passage extending in a flow direction lengthwise along the housing;

a first plurality of thermally insulative bricks circumferentially disposed about the gas passage;

a second plurality of thermally insulative bricks circumferentially disposed about the first plurality of thermally insulative bricks, wherein each brick of the second plurality of thermally insulative bricks comprises:

a first axial surface having a first interlocking interface comprising a first groove, a first protrusion, and a first radial abutment between the first groove and the first protrusion;

a second axial surface having a second interlocking interface comprising a second groove, a second protrusion, and a second radial abutment between the second groove and the second protrusion, wherein the first and second axial surfaces are disposed on axially opposite sides of the brick; and

wherein the first interlocking interface of a first brick mates with the second interlocking interface of a second brick to define an interlocking interface, wherein the first and second bricks of second plurality of thermally insulative bricks are axially stacked one over another, and the interlocking interface blocks radial movement between the first and second bricks;

a thermally insulative liner disposed about the second plurality of thermally insulative bricks;

a bellows seal disposed about the thermally insulative liner and comprising bellows having alternating ribs and grooves;

a thermally insulative material disposed between the thermally insulative liner and the bellows seal; and

a plurality of heat exchanger tubes downstream of the bellows seal, wherein the bellows seal is configured to expand and contract in the flow direction.

19. The system of claim 18 , wherein the bellows seal comprises an annular wall having an alternating diameter that radially increases and decreases in an alternating manner along the flow direction.

20. The system of claim 18 , wherein the housing comprises a throat in a dome-shaped portion of the housing, and the bellows seal is disposed in a first 40 percent of the dome-shaped portion near a gas inlet into the housing.