The main criterion characterizing the efficiency of the equipment of an industrial facility is its operation without failures and damages. To reduce the emergency rate, there has been proposed an emergency prevention system targeted at identifying the technological situation at the facility, predicting its further development, and also de-veloping the control actions to return the facility to normal operation. The task of identifying pre-emergency and emergency situations for technological objects is realized as a particular task of recognizing a technological situation based on a situational mathematical model of an object. The situational mathematical model of the object is implemented as a set of production rules that reflect the knowledge of experts about the identification of pre-emergency situations at the object, as well as possible trajectories for bringing the control object into normal operation. A three-level grouping of the rules of the situational mathematical model by security levels is proposed. The features of the formation of the rules of the situational mathematical model in the processing of qualitative information about the object are considered. Based on the situational mathematical model, a method for identifying pre-emergency situations is proposed, the stages of the method implementation are described. An algorithm of functioning the emergency prevention system has been developed. The interaction scheme of the proposed emergency prevention system and the process control system based on the SCADA system is determined. The use of the proposed system will improve the safety and stability of the operation of hazardous technological facilities
Fail-safety taken as a factor of completeness of using the resources of the production facility is important for characterizing the technological process. In most modern automated process control systems the above factor is implemented by means of the emergency protection system which allows to avoid the progressing emergency. However, such measures significantly increase the downtime of process equipment, since the possibility of developing pre-emergency and emergency situations when combining several permissible and close to emergency values of parameters is not taken into account. To solve the problem of reducing machinery downtime, a method for determining the object state indicator has been proposed. It takes into account all variants of the influence of technological parameters on each other as well as their combinations leading to the emergency progress. As well, the proposed solution helps to set the proximity of the operating mode of the production equipment to the threshold emergency, which greatly reduces the risk of emergency in situ, thereby reducing equipment downtime and economic losses. The method of determining the indicator of the state of the object is considered on the example of the stabilization block of hydrogenate catalytic reforming unit.
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