Furnace wall, gasification unit and integrated gasification combined cycle, and method of manufacturing furnace wall

A furnace wall comprising:

• a plurality of tubes arrayed in a predetermined direction and defining a cylindrical construction, a coolant flowing inside the tubes;
• and
• a plurality of connections hermetically sealing spaces between the adjacent tubes, wherein
• the tubes are disposed in contact with each other at contact areas in a throat section of the cylindrical construction having a horizontal cross-section having a diameter smaller than the diameter of the cross-section of other portions of the cylindrical construction, and some of the connections comprise inner-circumferential-side connections disposed closer to the inner circumferential side of the cylindrical construction than contact areas, and
• the contact areas of at least some of the tubes have flat portions formed by cutting outer faces of the tubes.

A furnace wall comprising:

• a plurality of tubes arrayed in a predetermined direction and defining a cylindrical construction, a coolant flowing inside the tubes;
• and
• a plurality of connections hermetically sealing spaces between the adjacent tubes, wherein
• the tubes are disposed in contact with each other at contact areas in a throat section of the cylindrical construction having a horizontal cross-section having a diameter smaller than the diameter of the cross-section of other portions of the cylindrical construction, and some of the connections comprise inner-circumferential-side connections disposed closer to the inner circumferential side of the cylindrical construction than contact areas, and
• the centers of the tubes are disposed on a horizontal cross-section of the cylindrical construction at different radial distances from the center of the cylindrical construction in the throat section.

A method of manufacturing a furnace wall comprising:

• arraying a plurality of tubes in a predetermined direction and defining a cylindrical construction, a coolant flowing inside the tubes;
• and
• disposing a plurality of connections hermetically sealing spaces between the adjacent tubes, wherein
• the tubes are disposed in contact with each other at contact areas in a throat section of the cylindrical construction having a horizontal cross-section having a diameter smaller than the diameter of the cross-section of other portions of the cylindrical construction, and the connections are disposed closer to the inner circumferential side of the cylindrical construction than contact areas,
• some of the connections in the throat section comprise outer-circumferential-side connections disposed closer to the outer circumferential side of the cylindrical construction than the contact areas,
• the outer-circumferential-side connections comprise rod-like members extending in the longitudinal direction of the tubes,
• the inner-circumferential-side connections comprise rod-like members extending in the longitudinal direction of the tubes,
• the rod-like members of the outer-circumferential-side connections are connected with the respective rod-like members of the inner-circumferential-side connections, the outer-circumferential-side connections and the inner-circumferential-side connections having end portions being folded back, and
• the rod-like members of the outer-circumferential-side connections each have at least one cut.