GB994833A - Chequer bricks for the chequer work of regeneratively operated hot-blast stoves - Google Patents

Abstract

994,833. Thermal regenerators. STEULER INDUSTRIEWERKE G.m.b.H. March 19, 1962 [March 23, 1961], No. 10371/62. Heading F4K. Chequer brick work for a hot blast stove comprises a plurality of flow zones each joined by a mixing zone, the bricks forming the flow zones being identical and having passages therethrough which are aligned to form gas flow paths and the bricks forming the mixing zones being identical and having larger passages therethrough, the dimensions of the larger passages being such that each larger passage can be aligned with a plurality of gas flow paths and the bricks of the mixing zone being so arranged that the gas flow paths in a flow zone communicating with one passage in an adjacent mixing zone communicate with a plurality of passages in the other adjacent flow zone. The bricks A of the flow zones are as shown in Fig. 1 and have pairs of channels 4, 4a of equilateral triangular cross-section arranged around the vertical axis X-X of the brick, the channels being defined by radial walls 1 and separating walls 2. A circular recess 5 is formed at the centre of the brick and part circular recesses 5a are formed at the outermost points of intersection of the walls 2. Corresponding projections (not shown) are formed on the underside of the brick to enable the bricks to be stacked together to form a flow zone. The bricks B forming the mixing zone are as shown in Fig. 2 and are the same as bricks A except in that the portions of the walls 2 separating the channels 4 and 4a are omitted to define channels 7 of rhomboidal cross-section, and the recesses 5 and 5a are omitted and replaced by recesses 8 located as shown. The projections on the underside of the brick are the same as those of brick A. On assembly a horizontal layer of bricks B is placed on a flow zone formed by superimposed horizontal layers of bricks A so that each pair of passages 4, 4a communicate with a separate, single, passage 7. Further bricks A are then placed on top of the first layer of bricks B and, due to the location of the recesses 8, these bricks are offset with respect to the bricks A beneath the layer of bricks B. If now a second layer of bricks B is placed on the further bricks A the passages 7 in this second layer will be offset with respect to those of the first layer. Thus, the two passages 4 and/or 4a of the further bricks A which communicate with a single passage 7 in the first layer of bricks B will communicate with two different passages 7 in the second layer of bricks B.