The S-PAA can be seen as a Global Optimization solution, based on the fundamental principles of Engineering, Thermodynamics, Mass Balance, Phase Equilibrium), being complementary to conventional control solutions and independent from advanced control. S-PAA was born online and uses technology that has been tested in critical conditions, such as those in the petrochemical and sugar-ethanol market.
Real Time Optimization (S-PAA)
S-PAA FOR SUGAR & ETHANOL PRODUCTION PROCESS
The search for increasing the efficiency of sugar-energy processes emerges as a major concern in a very competitive market. This leads companies to look for a differential and reduce operational costs.
Complexity of the sugar & ethanol market:
High variability in the quality and in the productivity of the raw material;
There are multiple objectives and interrelated processes in a sugar & alcohol industrial plant;
There are multiple target markets (sugar, ethanol and electric power generation);
Prices and demands fluctuate frequently;
There is a growth in environmental restrictions.
This scenario indicates that the operation must adapt quickly to the dynamics of the business. This requires tools, methods and procedures that allow a quick and continuous performance in the various operational parameters.
In this context, the S-PAA presents itself as an online system that simulates the behavior of the plant and predict the deployment of actions, indicating a better way to operate it, considering the economic, technical, environmental aspects, equipment limitation, safety, quality and commitments assumed by the plant management team.
The features available at S-PAA make it possible to carry out studies and process analysis easily, allowing the monitoring of indicators and process variables through graphical tools and detailed reports.
S-PAA graphic tool.
On-line sugar balance
On-line vapor balance
Custom reports and automatic e-mail sending
PDCA ON-LINE - OPEN LOOP
The S-PAA, when in Open Loop mode, directs the operational action in the moment that the variations occur, based on the mass balance and engineering definitions.
In addition to assessing whether the applied actions had an effect, the S-PAA provides a justification field for the operator to report his decision making.
With the history of alarms and justifications, it is possible to determine actions that are more consistent with the operational reality.
The S-PAA points out deviations and variables that are outside the operational range, through visual alarms.
An Integrated Tutotial shows the operator which action, pre-determined, must be taken to correct the deviation pointed out.
The S-PAA Open Loop acts as a truly operational management tool in real time.
ON-LINE ACTION - CLOSED LOOP
The performance of the S-PAA in Closed Loop, consists of configuring the system to interact with the plant supervisory system so that the S-PAA could automatically determine specific set points of the process. In this way, the updating and validation of critical set points is done continuously, and can occur every 10 seconds.
S-PAA automatically controlling the set points
S-PAA Closed Loop example acting on a supervisory screen.