RECUPERATOR Russian patent published in 1997 - IPC

FIELD: metallurgy; heating of air in furnaces. SUBSTANCE: cross section of inlet channel is made variable-section in length of walls of T-shaped channel. Ratio of minimum distance h between walls of inlet channel to maximum distance H between walls is 0.1-0.6. Ratio of maximum distance H between walls to distance S between axes of T-shaped members is 0.35-0.5. Ratio of thickness δ of web of T-shaped member to its length 1 is 0.001-0.5. Summary area F of inlet channels is set following the dependence: where F - summary area of inlet sections of channels m²,; Q - flow rate of air passing in through all channels of recuperator, m³/s, ΔP - pressure differential between air and smoke channels, kg/m²; K - empirical coefficient characterizing hydraulic resistance of inlet channels equal to 0.25-0.30 0,25-0,30 s•kg^0,5/m².. EFFECT: enlarged operating capabilities. 2 cl, 3 dwg , 1 tbl