Scrubber mathematical model

Some investigators have proposed, mostly on the basis of mathematical modeling, to optimize the design of scrubbers to obtain a given efficiency with a minimum power consumption (e.g., Goel and Hollands, op. cit.). In fact, no optimum in performance appears to exist apart from some avoidable regions of unfavorable operation, increased contacting power yields increased efficiency. 

Subsequently, Calvert (R-19, p. 228) has combined mathematical modeling with performance tests on a variety of industrial scrubbers and has obtained a refinement of the power-input/cut-size relationship as shown in Fig. 14-130. He considers these relationships sufficiently reliable to use this data as a tool for selection of scrubber type and performance prediction. The power input for this figure is based solely on gas pressure drop across the device. 

The sulfite oxidation rate in hold tanks of antipollution scrubbers is central to flue gas desulfurization technology. The accurate description of the rate of disappearance of sulfite slurry particles (from the scrubber liquor) bears upon both process selection and economics. This article will describe a mathematical model for a semi-batch, stirred tank reactor in which S(IV) anions, sulfite and bisulfite, are reacted with dissolved oxygen gas at saturation. Experimental work to secure several physical parameters and to verify the... 

Detailed mathematical models and design equations for predicting the grade penetration and systan pressure drop have been developed [2,18,29,52,56,57,59]. Summaries of some of these models are shown in Tables 53.11 and 53.12. Pressure drop equations for other scrubbers can be found in standard Chemical and Environmental Engineering texts or handbooks [11-16]. 

The program ANSYS-14/CFX mathematical model of motion of polydispersed gas system. The character of the movement of dust particles under the influence of centrifugal force. This allowed choosing the desired hydrodynamic conditions and taking into account of the design under various conditions of scrubber. Experimental study of the hydrodynamic characteristics of the device to determine the empirical constants and test the adequacy of the hydrodynamic model. 

For calculation of fractional efficiency of a dust separation in a scrubber the mathematical model of a mass transport firm of gas in liquid in a zone of motion of a twirled layer of drops is made. At model formulation it was considered that the dust separation in the apparatus occurs as at the expense of centrifugal separation in the twirled stream, and by their inertia... 

The mathematical model of motion of a dispersion stream in a scrubber Is devised. At the heart of model studying of a mechanical trajectory of separate corpuscles and drops, in terms of effects regime and the design data of a scrubber which are sized up by a similarity parameter of apparatuses on the basis of similarity theory of physical processes is necessary. 

Creating a mathematical model of the motion of a particle of dust in the swirling flow allowed us to estimate the influence of various factors on the collection efficiency of dust in the offices of the centrifugal type, and create a methodology to assess the effectiveness of scrubber. 

Rigorous, flow-sheet-based models for hydrocrackers include sub-models for furnaces, pumps, compressors, reactors, quench zones, flash drums, recycle gas scrubbers, fractionation towers, and - importantly - economic data. As discussed in Chapter 23 by Mudt, et al., such models can comprise hundreds of reactions and hundreds of thousands of equations. The model grows when inequalities are included to ensure a feasible solution that honors process constraints. To solve such models in real time (i.e., in less than an hour), open-equation mathematics and high-powered solvers are used. 

The mathematical description of a fluid kinetics of the scrubber, allowing defining profiles an axial and peripheral component of speed of a gas stream Is offered. The model reflects essential features of the twirled motion of phases in characteristic hydrodynamic zones of the apparatus. 

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