DEVICE AND METHOD FOR COOLING OF WASTE GASES OF BURNING FURNACE IN ITS BYPASS CIRCUIT Russian patent published in 2013 - IPC F27D19/00 F27B7/20 

FIELD: metallurgy.

SUBSTANCE: according to the proposed method, some portion of gases is removed from burning system (1, 3) and cooled in mixing chamber (9) containing a tubular casing, to which gases are introduced from one end through inlet channel (11). Cooled gases are removed from the other end through outlet channel (13). Cooling gases are supplied to the mixing chamber through tangential inlet channel (15) with draft device (17). Waste gases are drawn through the bypass circuit with the second draft device (19). Mass flow rate m_A and flow velocity v_A of the gases supplied to mixing chamber (9), and mass flow rate m_B and flow velocity v_B of cooled waste gases removed from chamber (9) are measured. Actual mass flow rate m_C and velocity flow v_C of the gases drawn through bypass circuit (7) is determined based on values m_A, v_A, m_B and v_B and compared to the specified value for waste gases directed through the bypass circuit. Actual swirl ratio S is determined for gases in mixing chamber (9) based on values m_A, v_A, m_C and v_C and compared to the specified required value. At least draft device (17) and draft device (19) is controlled.

EFFECT: reduction of the amount of fouling in the burning system and reduction of penetration of cooling gases to the burning system.

10 cl, 3 dwg