LINING OF TUBE FURNACE FLUE GAS TUNNEL OF STEAM REFORMING Russian patent published in 2006 - IPC F27D1/00 

FIELD: structural components, of thermal sets, in particular, lining of the tube furnace flue gas tunnel of steam reforming, being part of an ammonia synthesis plant, and also applicable in production of other products, for example, methanol.

SUBSTANCE: the lining includes wall with openings for passage of flue gases positioned on the furnace bottom and shoulders in the upper part reducing the tunnel span, made of refractory articles laid in rows and a broken joint and with expansion joints, and a floor resting on the shoulders of the walls, the floor is made of staggered T-shaped articles of mirror directivity. The lining is made continuous with vertical expansion joints between all the articles; all articles are laid dry and fastened to one another by means of tenons and slots longitudinally oriented in the tunnel axis; the shoulders are made in the form of refractory shaped articles with beveled angles facing the tunnel, whose center of gravity is inside the wall cross-section, and the lower row of each wall is made of refractory articles, the length of each of them is not multiple of the length of the wall article and exceeds the latter by less than 3 times; the floor is joined to the shoulders by means of tenons positioned on the larger base of the N-shaped articles; the width of holes 7 makes up less than half the length of the wall article.

EFFECT: enhanced durability of the lining of the flue gas tunnel, simplified production of the lining, its partial repairs and diagnostics of the headers.

3 dwg