Power plant with a combustion chamber with combustion in a fluidized bed

A power plant with a combustion chamber having a wall having an outer and inner side, said wall defining a combustion chamber space in which fuel is burnt in a fluidized bed of particulate material said wall comprising:

• a layer of thermally insulating material provided on the inner side of the wall and including;
• a plurality of flanged channel-section members, having flanges directed inwardly toward the combustion chamber and a plurality of U-shaped guiding members;
• said channel-section members and said guiding members defining a grid, said grid including a plurality of grid units, each unit including at least two channel-section members and guiding members constituting corners of said unit, each guiding member receiving ends of said channel section members,
• at least one end of each channel-section member being movably disposed in said guiding member;
• a plurality of cover plates having edge elements, each cover plate covering a respective unit of said grid, said edge elements extending between said flanges of said channel-section members forming said grid unit;
• a plurality of fixing members overlapping corners of said cover plates;
• and,
• means for securing said fixing means to the outer side of the wall and retaining said cover plates in place in said grid unit.