Description of technological object
Automated control system (ACS) of slurry preparation
on division of two-stage slurry correction at 'Podilsky Cement' enterprise
is performed on the basis of technical requirements elaborated as
a result of preliminary inspection of technological process of preparation
of set-point titre slurry in operational basin by means of automatic
stabilization of ratio of different titre slurry supply from first-stage
slurry basins.
Destination of the ACS
On the whole the system is intended for automated
control of technological process of set-point titre slurry making
in operational slurry basin. At that visualization of the process
and accounting of slurry is provided.
Main task of the system is implementation of hardware
and software solution on division of two-stage slurry correction
that enables to perform automated control of slurry preparation.
At that stability of titre of slurry is achieved in operational slurry
basin. It provides making of high quality end product, and as a
result promotes improvement of technical and economic indices of
production.
Structure and functions of the ACS
The ACS of slurry preparation is integrated automated
system that is based on present-day universal automation system
SIMATIC C7 from SIEMENS and computer,
which both perform the functions of measurement, monitoring, automatic
and remote manual control, visualization and archiving of events
and parameters of technological process.
Structure chart of the system is represented on figure
1.
Figure 1 - Structure chart of the
ACS of slurry preparation
The system provides automatic maintenance of set-point
value of titre of slurry in operational slurry basin, namely:
visualization of slurry preparation process
and calculation of amount of slurry gone;
automatic stabilization of ratio of flow rates
of slurry of different titres;
measurement of slurry flow rates with accumulation
(point-by-point integration of flow) in every first stage
basin (3 basins);
indication of valve position on slurry supply
(4 valves);
automatic adjustment and remote control of
valve position;
monitoring and visualization of historical
trends of slurry flow;- capacity of information transfer to
production manager (by means of PROFIBUS
industrial network);
The appearance of control cabinet is represented on
figure 2. It contains compact control module SIMATIC
C7-635 (SIEMENS), signal converters MAG5000
(4 ones) from SIEMENS for induction flowmeters MAGFLO
with MAG3100 sensors, elements of manual
remote control of slurry valves and indication of their position,
interposing relays, automatic circuit breakers, connector blocks
and other auxiliary hardware. |
