| Abstract |
The appropriate designs of odor reduction from bottom ash used lab-scale modified expanded bed reactor, which simulated induced heat and CO2 emission from incinerator, were investigated in this study. This research was based on the test results of previous studies "The characteristics of odor reduction of bottom ash in expanded bed reactor", to improve the efficiency of odor reduction. The investigation of lab-scale expand bed reactor appropriate condition, including the pore size of bottom ash loading plate, the ratio of bottom area and effective height of the reactor and the ratio of air diversion pipe length and effective height of the bottom reactor, had been completed. The efficiency of odor removal of bottom ash were determined by the electronic nose. The conditions for the optimal efficiency of odor reduction from bottom ash in lab-scale modified expanded bed reactor, including the temperature of thermal desorption reaction controlled at 200℃, the flow rate of air and CO2 5.0 L/min to air, 0.1 L/min to CO2, the ratio of bottom area and effective height of the reactor controlled at 1:3 and the ratio of air diversion pipe length and effective height of the bottom reactor 1:2, respectively. In order to obtain the optimum operation condition for odor reduction of bottom ash in expanded bed reactor, radius of intake and exhaust pipe were controlled at 0.05 cm and 2.0 cm, respectively. The ratio of length of outlet pipe to radius of reactor bottom has been established as the reaction space of bottom ash in expanded bed reactor. After modification of the expanded bed reactor, the odor strength was significantly decreased from 1,000 to 100 approximately, and overall reduction rate was improved more than 2 times. The odor of bottom ash has reduced significantly in modified lab-scale expand bed reactor, and saving energy and reducing carbon emission with the temperature and CO2 of incinerator flue emission were achieved, simultaneously. |
