Jet Loop Reactor에서 연소배가스중 CO2를 이용한 알칼리염색폐수 중화

Abstract

Absorption experiments of CO2 in a synthetic alkaline dye wastewater are carried out to investigate the effect of operating parameters on neutralization characteristics in a bench-scale jet loop reactor. Operating parameters investigated in the study are the gas flow rate, recirculating liquid flow rate and liquid temperature. The experimental results at semi-batch operation show that the pH of the wastewater rapidly decreases with the gas flow rate in the reactor. However, the amount of CO2 used may be the same to neutralize the same amount of the wastewater from the initial wastewater pH of 10.1 to pH 7.0. At constant gas flow rate, the time required to fall from the initial wastewater pH of 10.1 to pH 7.0 decreases with the liquid recirculating flow rate, reaches a minimum value in the range of QL=16L/min and QL=24L/min ,and then increases with further increase in QL. In the case of Neutralize speed according to temperature, reducing time decreases to reaches pH7 with increasing temperature. The experimental results at continuous operation show that gas-liquid ratio increases, the pH of the treated water has low emissions, but utilization of CO2 tended to decrease. At gas-liquid ratio is 1, wastewater is discharged into the pH 7.11. At this time, showed a high CO2 utilization of 88%. And, when the gas-liquid ratio 1 schedule with increasing the gas flow rate, Lower the pH of the wastewater, but utilization of CO2 is decreased Significantly. Throughout the experiment the utilization capacity of CO2 neutralize the wastewater is higher in the high pH.