Estudo de simulações computacionais das principais malhas de controle de uma caldeira aquatubular para avaliação das estratégias de controle típicas

Abstract

Steam production is an effective and commonly used procedure for heat transfer in industrial applications and energy production. To make this operation viable, boilers play a fundamental role. However, it is important to highlight that these systems are associated with considerable operational risks, ranging from possible hazards to high-temperature steam leaks and accumulation of toxic toxic gases. For these reasons, it is important that this type of process is better managed with the help of automation, control and instrumentation. In this context, the proposal of this work consists of implementing a computational model to simulate the joint operation of the main control loops (upper tube water level loop, steam pressure in the boiler exhaust and temperature in the combustion chamber) of a boiler. watertube, which operates integrated in a hypothetical scenario to evaluate the performance of designed control systems in particularities of changes in process steam demand and other disturbances. Therefore, the work ranges from obtaining the models, choosing the strategy and type of control, to evaluating the tuning performed. This process aims at effective coordination between the different control loops, allowing one loop to respond appropriately to any disturbance caused by another loop. This, in turn, allows the drivers to adjust and correct the disturbances generated, thus keeping the initially defined reference values stable and accurate.