E. A. Philimonova et al. : Cleaning of Gas Flow Using Chemical Reaction Database
261
Our experience has shown that the total lists of components and reactions can be
reduced by more than a factor of two. The results obtained with the reduced
kinetics are practicalJy identical to those for the total set of equations. This alJows
users to solve problems faster and with reasonable accuracy. For example, we
studied the evolution of a system that was described with 160 species and 1250
reactions. For 1-10 sec of physical time the solution required 4-5 min computing
time on a DELL PowerLine PENTlUM-60. This time was lessened by a factor of
1.5 when the reduced kinetics were used.
6 TOOLS FOR REPRESENTING RESULTS
The various information in convenient form is given by the tools representing
results. The user can find the operating time intervals for each component when it
is included in the operating set of equations. This depends on development of the
chemical processes. More detailed information about each component with
leading reactions is given as a diagram (an example is shown below).
The interactive graphic representation is used for the concentrations of
components versus time dependence. The user can select (un select) any
component in the species list and its time-dependent concentration will be drawn
on the diagram marked in its own colour. It is possible to change the scale of axes,
their type (linear or logarithmic), and to move the diagram along the axes. The
diagram can be printed in the graphic mode.
7
USER INTEGRATED ENVIRONMENT
The user integrated environment was developed using Borland Pascal with Objects
7.0. It operates under DOS on IBM compatible pes. We can incorporate it into
Windows.
The described applications software has been used for simulating the cleaning
processes of possible flue gases. CO 2 , H 2 0, 02 and impurities NO, S02, CO are
considered. It is assumed that the flow field (velocity, density) is known and a high
voltage pulsed electrical discharge of the corona type operates in the flow. Usually
discharges of this type propagate in gases as many thin filaments (streamers) in
which diverse active species are produced. Usually the discharge slightly disturbs
the main flow and the initial volume of the streamers is small. In such a manner
the non-uniform reactive gas flow takes into consideration the streamer
interactions due to their diffusion expansion. The diffusion model was described
in [5]. After execution of the program involving reduced kinetics the operating
files contain 84 reagents and 474 reactions.
The numerical results show that the main process leading to removal of toxic
components is oxidation of S02 and NO. The diagram for NO is presented in
Figure 1. On the left side there is a list of leading reactions. Integer numbers in the
main part of the chart correspond to the intensity of the reaction in which a chosen
chemical component is produced by each reaction. Examples of concentration
variation vs. time is shown in Figure 2. After operation of 450 pulses the total
261
Our experience has shown that the total lists of components and reactions can be
reduced by more than a factor of two. The results obtained with the reduced
kinetics are practicalJy identical to those for the total set of equations. This alJows
users to solve problems faster and with reasonable accuracy. For example, we
studied the evolution of a system that was described with 160 species and 1250
reactions. For 1-10 sec of physical time the solution required 4-5 min computing
time on a DELL PowerLine PENTlUM-60. This time was lessened by a factor of
1.5 when the reduced kinetics were used.
6 TOOLS FOR REPRESENTING RESULTS
The various information in convenient form is given by the tools representing
results. The user can find the operating time intervals for each component when it
is included in the operating set of equations. This depends on development of the
chemical processes. More detailed information about each component with
leading reactions is given as a diagram (an example is shown below).
The interactive graphic representation is used for the concentrations of
components versus time dependence. The user can select (un select) any
component in the species list and its time-dependent concentration will be drawn
on the diagram marked in its own colour. It is possible to change the scale of axes,
their type (linear or logarithmic), and to move the diagram along the axes. The
diagram can be printed in the graphic mode.
7
USER INTEGRATED ENVIRONMENT
The user integrated environment was developed using Borland Pascal with Objects
7.0. It operates under DOS on IBM compatible pes. We can incorporate it into
Windows.
The described applications software has been used for simulating the cleaning
processes of possible flue gases. CO 2 , H 2 0, 02 and impurities NO, S02, CO are
considered. It is assumed that the flow field (velocity, density) is known and a high
voltage pulsed electrical discharge of the corona type operates in the flow. Usually
discharges of this type propagate in gases as many thin filaments (streamers) in
which diverse active species are produced. Usually the discharge slightly disturbs
the main flow and the initial volume of the streamers is small. In such a manner
the non-uniform reactive gas flow takes into consideration the streamer
interactions due to their diffusion expansion. The diffusion model was described
in [5]. After execution of the program involving reduced kinetics the operating
files contain 84 reagents and 474 reactions.
The numerical results show that the main process leading to removal of toxic
components is oxidation of S02 and NO. The diagram for NO is presented in
Figure 1. On the left side there is a list of leading reactions. Integer numbers in the
main part of the chart correspond to the intensity of the reaction in which a chosen
chemical component is produced by each reaction. Examples of concentration
variation vs. time is shown in Figure 2. After operation of 450 pulses the total