Wall structure of hot fluid chamber

A wall structure of a hot fluid chamber, comprising

• an inner metal wall directly contacting a hot fluid;
• support pins outwardly projecting from the outer surface of the inner metal wall and equidistantly arranged in both longitudinal and lateral directions of the inner metal wall;
• coupling members fixed to the inner metal wall by the support pins, each coupling member made of a heat-insulating refractory material and having a truncated quadrangular pyramid shape;
• rod-like heat-insulating refractory blocks, each mounted between two adjacent coupling members, having an oblong upper face, an oblong lower face, two trapezoidal side faces conforming with and making sliding motions along the trapezoidal side faces of the coupling member, two reversed trapezoidal side faces, and a cushioning layer formed of an elastic refractory material and providing the lower portion of the rod-like block;
• plate-like heat-insulating refractory blocks, each having a reversed truncated quadrangular pyramid shape, mounted in a concavity formed by four rod-like heat-insulating refractory blocks in a manner to make sliding motions along the reversed trapezoidal side faces of the rod-like blocks, and having a cushioning layer made of an elastic refractory material in the underside portion of the plate-like block;
• a heat-insulating layer formed of an elastic refractory material and uniformly covering the outer faces of the coupling members and of the heat-insulating refractory blocks;
• and
• an outer metal wall covering the heat-insulating layer.