LINING OF SMOKE FLUE OF VERTICAL MULTICHAMBER RADIANT-CONVECTIVE FURNACE Russian patent published in 2005 - IPC

FIELD: structural members of tube furnaces of the petroleum refining industry, in particular, construction of the lining of the smoke flue of the vertical multichamber radiant-convective furnace used in installation of catalytic reforming, hydrofining and aromatization.

SUBSTANCE: the construction has vertical walls: an inner wall engageable with the working space of the furnace radiant chambers and having holes for passage of flue gases, and an outer wall located on the side of the furnace jacket, made of tongued refractory products laid in rows in a broken joint and with expansion joints of the tongued refractory products and having on the side of the flue mirror-located projecting rows of supporting products positioned one under another in height of the flue, the connecting partitions are made of refractory shaped members installed on the projecting rows forming the horizontal tunnels of the flue, and a heat insulation adjoining the jacket. The novelty is in the fact that each member of the partitions is made in the form of two refractory shaped products installed for independent displacement relative to each other in the vertical axis of the flue at a thermal expansion of the lining walls and interconnected by means of L-shaped bulges made on the ends of the products, facing the flue axis and built in the vertical walls by other tongued ends laid on the supporting beveled products of the projecting row, the outer wall is made tied to the jacket for displacement in the vertical axis of the flue at a thermal expansion of the lining by means of successively engageable shaped members with holes positioned in rows in the lining of the outer wall at an interval of 6 to 9 rows, shackles with one end installed in the hole of the product, and with the other - in the hole of the angle piece welded to the jacket; all the products of the lining are dry laid, with the vertical expansion joints between each product. The outer and inner vertical walls with built-in refractory shaped members of the partitions are made of materials with a different coefficient of linear thermal expansion, larger one at the outer wall.

EFFECT: enhanced stability of the smoke flue lining due to enhanced building strength of it at a thermal expansion.

4 cl, 2 ex, 5 dwg