Showing papers on "Spray tower published in 1991"
TL;DR: In this paper, the heat transfer to, and the resultant evaporation of, drops of a volatile liquid sprayed upward in an immiscible liquid flowing down in a vertical column are analyzed to enable calculation of the volumetric heat transfer coefficient in the column.
Abstract: The heat transfer to, and the resultant evaporation of, drops of a volatile liquid sprayed upward in an immiscible liquid flowing down in a vertical column are analyzed to enable calculation of the volumetric heat transfer coefficient in the column. For this analysis, a model is contrived that assumes no nucleation delay in initially monodispersed drops and a heat transfer to each of the drops, with simultaneous evaporation, that can be approximated by an empirical correlation for heat transfer to an isolated drop evaporating in a quiescent, sufficiently extended medium. The expression obtained for the volumetric heat transfer coefficient is used to predict its values under some particular column operating conditions, which are then compared with relevant experimental data found in the literature.
14 citations
Patent•
12 Feb 1991
TL;DR: In this article, the authors proposed a method to remove CO2 from combustion exhaust gas while preventing the deterioration of a CO2 absorbing solution and the lowering of CO2 removing efficiency by subjecting combustion exhaust gases to wet desulfurization treatment and removing CO 2 from the treated exhaust gas before removing a harmful substance therefrom.
Abstract: PURPOSE:To remove CO2 from combustion exhaust gas while preventing the deterioration of a CO2 absorbing solution and the lowering of CO2 removing efficiency by subjecting combustion exhaust gas to wet desulfurization treatment and removing CO2 from the treated exhaust gas before removing a harmful substance therefrom. CONSTITUTION:At first, combustion exhaust gas is treated in a wet desulfurization process 2 due to a limestone/gypsum method or a gas bubbling method. Subsequently, the exhaust gas after desulfurization treatment is treated in a CO2 separating process 4 due to a monoethanolamine method to remove CO2. Further the exhaust gas after the treatment in the CO2 separating process 4 is washed in a spray tower 5 using city water to remove a harmful substance. As mentioned above, since wet desulfurization treatment is performed prior to the removal of CO2 in the exhaust gas, dust, SOx and the like are reduced and the deterioration of a CO2 absorbing solution is eliminated and CO2 can be effectively removed.
6 citations
TL;DR: In this paper, a numerical model describing performance of a liquid-liquid spray column heat exchanger is developed, for a dispersed packed column operating in steady state, where the fundamental equations for the continuous and distributed phases are developed in Eulerian and Lagrangian forms, respectively.
Abstract: A numerical model describing performance of a liquid-liquid spray column heat exchanger is developed. The model is for a disperse packed column operating in steady state. The fundamental equations for the continuous and distributed phases are developed in Eulerian and Lagrangian forms, respectively. The model predicts simultaneously the volume fraction, velocity, and temperature for each phase. Energy and momentum are exchanged between phases through source variables. Empiricism in the model is limited to the specification of droplet drag coefficient and Nusselt number correlations which are utilized to calculate momentum and energy source terms. Application of the computer model to column operation yields predictions that compare closely with experimental results.
6 citations