Granular-Bed-Filter Development Program, Phase II. Granular-Bed-Filter Analytical Model: Software User Manual

摘要

The Granular-Bed Filter (GBF) being developed by Combustion Power Company is modeled by a set of 3 governing equations which are solved using finite-difference techniques on a digital computer. The equations model the gas flow, capture of suspended particles, and distribution of captured particles. In lieu of a fourth equation describing the flow of granular material, experimental data are used. The equations are described and their merits briefly discussed. The solution techniques used to solve the governing equation are presented in detail. Numerical stability of the interative procedures is discussed along with other possible problems that may occur during the execution of the program. Some solutions to these problems are presented. The computer model produces results that include the spatial distribution of pressure, particle concentration (suspended and adhering) and gas flow in addition to the average penetration of particles and pressure drop across the filter. The inputs to the program selectable by the user describe the operating conditions of the filter, nature of the particles and rates of reentrainment. Parameters required by the model for solution but not easily measured or usually known are discussed and suggested values are presented. Typical execution time on a Digital Equipment Corporation PDP 11/23 computer is between 30 and 40 minutes. (ERA citation 08:014653)