Heat exchanger incorporating a tube bundle arranged in a cylindrical bundle casing held radially inside an outer cylindrical casing

Heat exchanger incorporating a tube bundle (2) arranged in a cylindrical bundle casing (5) held radially inside an outer cylindrical casing (3) and placed coaxially with the latter, a set of spacer plates (8) arranged transversely relative to the bundle (2) inside the casing (5) and spaced along its length and several sets of supporting components (20, 30) fixed integrally to the bundle casing (5), arranged radially at the level of the spacer plates (8) and each inserted between the outer edge of a spacer plate (8) and the inner surface of the outer casing (3), with interposition of wedging means (23, 33) between the spacer plate (8) and the supporting component (20, 30), in which

• (a) the bundle casing (5) incorporates in its wall openings (14) each corresponding to a supporting component (20, 30), openings, cylindrical sleeves (15, 25) being fixed along the edge of said openings and projecting radially into the space between the bundle casing (5) and the outer wall (3) of the heat exchanger;
• and
• (b) each of the supporting components (20, 30) incorporates two cylindrical parts (20a, 20b-30a, 30b) having a common axis (XX'), one in extension of the other, including a large-diameter part (20a, 30a) welded by its outer side surface to the inside of the corresponding sleeve (15, 25) and incorporating a surface for supporting (20c, 30c) wedging means (23, 33) directed towards the tube bundle (2) and sloping radially relative to the axis XX' of the supporting component (20, 30), and a smaller-diameter part (20b, 30b) abutting with its end against the inner surface of the outer casing (3) of the heat exchanger.