Investigation Of Nozzle Atomizing And Mass Transfer Characteristic In Impinging Streams Absorber

Gas-continuous impinging streams (GIS) absorption is a novel chemical industry unit operation of growing up in recent several years. The high interphase velocity and the great disperse are able to enhance the transfer ability, which the tradition technology can not catch up with. In this thesis the influence factor and the intensify mass transfer effect of the absorption process are discussed, and the main research content as follow:1. The droplets characteristic parameter is study through experiment in Phase Doppler Particle Analyzer(PDPA). The influence of nozzle pressure, spray distance, nozzle distance and solution concentration to jet atomization, impinging atomization and gas-liquid two phase impinging stream atomization are measured. The result show that, the enhance of pressure and spray distance play a driving role to atomization in every atomization form, besides, the nozzle distance and the solution concentration do harmful to atomization.2. Experimental research of impinging stream is processed in fast reversible reaction Na2CO3-CO2. The influence of nozzle pressure, nozzle distance, gas flow and solution concentration to the result of absorption are investigated, and compared with the bubble absorption in the same operating condition. The result show that, the absorption results of bubble absorption are superior to the impinging streams in all of the operating condition, which indicate that GIS absorber is unsuitable to the gas-liquid fast reversible reaction.3. Experimental research of impinging stream is processed in fast irreversible reaction NaOH-CO2, and the absorption result are investigated in the same operating condition of fast reversible reaction Na2CO3-CO2, and then the comparative analysis is processed. The result show that, the absorption results of NaOH-CO2absorption are superior in all of the operating condition; GIS performance superior to the bubble absorption in fast irreversible reaction.4. The non-dimensional treatment is processed to the parameters on the basis of the experimental research. The relational of the technology parameters, a, k^a, Fr, Re is obtained. The relational can well forecast GIS absorption reaction of different parameters in the experimental.