METHOD FOR DISINFECTION OF SMOKE GASES OF FUELBURN AGGREGATES Russian patent published in 2009 - IPC F23G7/00 

FIELD: technological processes.

SUBSTANCE: invention is related to methods for disinfection of smoke gases and may be used in metallurgical and other industry fields. Method for disinfection of smoke gases of fuelburn aggregates includes burning of fuel in fuel chamber 1 of fuelburn aggregate in mode of incomplete fuel burning at minimum possible coefficient of air excess α. Afterburning of smoke gases that are exhausted from fuelburn aggregate is realised in reactor 5, by introduction of additional gaseous fuel and air into reactor 5. Temperature in reactor 5 is maintained at the level of 750-1200°C. For burning of combustible components of fuel and smoke gases oxygen is used, which is contained in smoke gases. Regulation of smoke gases afterburning mode is carried out by regulation of additional gaseous fuel supply as per the following dependence: where: φ_p is amount of additional gaseous fuel, m³/hr; φ_sg is amount of smoke gases, which were sent for disinfection, m³/hr; C_sg is heat capacity of smoke gases, ccal/m³ °C; t_r is temperature of smoke gases in reactor, °C; t_sg is temperature of smoke gases at the outlet of fuel chamber of fuelburn aggregate, °C; Q_VNS is heat loss emitted into environment, ccal/hr; Q_ps is amount of heat produced from burning of combustible components contained in smoke gases, ccal/hr, q_p is calorific value of additional gaseous fuel, ccal/m³, Regulation of additional air supply for burning of additional gaseous fuel as per the following dependence: where: L_aa is amount of additional air, m³/hr; 0_2t is theoretical amount of oxygen required for burning of additional fuel, m³/m³; O_2sg is amount of oxygen in smoke gases, m³/m³; α_r is coefficient of air excess in reactor; φ_p is amount of additional gaseous fuel, m³/hr; φ_sg is amount of smoke gases that was sent for disinfection, m³/hr.

EFFECT: disinfection of smoke gases by reduction of carbon and nitrogen oxides concentration in smoke gases.

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