Cooling wall, gasifier, integrated gasification combined cycle, and manufacturing method of cooling wall

1. A cooling wall comprising:

a wall surface defined by arrangement of central axes of a plurality of cooling tubes in which a cooling medium flows; and

an opening formed in a part of the wall surface in which a burner is inserted and installable,

wherein each of the plurality of cooling tubes forming the opening has a straight portion and a curved portion,

wherein the plurality of cooling tubes include

a first cooling tube whose first virtual axis extending in an axial direction of the straight portion overlaps the opening, and

a second cooling tube whose second virtual axis extending in an axial direction of the straight portion is located outside an outer circumference of the opening in a radial direction,

wherein the curved portion of the first cooling tube is arranged so as to form a curve along the outer circumference surface of the opening and on a surface along the wall surface, or arranged so as to be spaced apart by a predetermined distance or less from the wall surface in a direction orthogonal to the wall surface and form a curve,

wherein the curved portion of the second cooling tube is arranged so as to be spaced apart from the first cooling tube in a direction orthogonal to the wall surface and form a curve, and

wherein the curved portion of the first cooling tube is arranged so as to be spaced apart from the wall surface in a direction orthogonal to the wall surface with the predetermined distance being less than or equal to a pitch of the same length as a diameter of the first cooling tube.

2. The cooling wall according to claim 1 ,

wherein a fin is arranged between the plurality of cooling tubes,

wherein the wall surface is formed in a cylindrical shape, and

wherein a combustion gas is generated by the burner inside with respect to the wall surface.

3. The cooling wall according to claim 1 , wherein the curved portions of a plurality of first cooling tubes are arranged on a surface along the wall surface.

4. The cooling wall according to claim 1 , wherein the curved portions of a plurality of second cooling tubes are arranged outside the wall surface in a radial direction with respect to the first cooling tube.

5. The cooling wall according to claim 1 further comprising a closed portion installed inside with respect to the wall surface around the opening and including a refractory material.

6. The cooling wall according to claim 1 further comprising a closed vessel installed outside with respect to the wall surface around the opening and connected to an outside of the wall surface and the burner, wherein a refractory material is filled in the closed vessel.

7. The cooling wall according to claim 6 , wherein the refractory material in the closed vessel is arranged so as to be spaced apart from a burner cooling pipe installed around the burner, and the closed vessel is detachable.

8. A gasifier comprising the cooling wall according to claim 1 .

9. An integrated gasification combined cycle comprising:

the gasification unit that generates a raw syngas by combusting and gasifying carbonaceous feedstock and has the cooling wall according to claim 1 ;

a gas turbine rotationally driven by at least partial combustion of a raw syngas generated by the gasification unit;

a steam turbine rotationally driven by steam generated by a heat recovery steam generator that introduces a turbine flue gas discharged from the gas turbine; and

a generator coupled to a rotary drive of the gas turbine and/or the steam turbine.