A liquid ammonia leakage monitoring method and monitoring system

Abstract

The present invention proposes a liquid ammonia leakage monitoring method and monitoring system, which includes the following steps: S1, obtaining the safety production history data of monitoring indicators, and calculating the index average value and index variance of monitoring indicators respectively; S2, obtaining monitoring indicators Real-time data; S3, if the real-time data of any monitoring index does not exceed the corresponding alarm threshold, then calculate the warning value Lv according to the real-time data of the monitoring index and the above-mentioned index average and index variance of the corresponding monitoring index; S4, according to different The early warning value produces different early warning signals. The present invention obtains the early warning value through a unique algorithm, and in the process of obtaining the early warning value, different early warning signals are generated according to the contribution degree of each monitoring index to the early warning value, so as to realize hierarchical early warning, thereby avoiding the occurrence of a single monitoring index only False positives and false positives occur.

Description

technical field [0001] The invention relates to the technical field of dangerous goods production, in particular to a liquid ammonia leakage monitoring method and monitoring system. Background technique [0002] Ammonia is an important chemical raw material. During the transportation, storage and use of liquid ammonia, improper operation or damage to storage tanks and valves will lead to leakage of liquid ammonia, damage the ecological environment and cause personnel poisoning and fires. Explosion accident. [0003] At present, in the ammonia-related refrigeration industry, in order to monitor the state of the ammonia storage, three sensors are usually installed on each ammonia storage, which are used to collect the data changes of ammonia concentration, pressure and liquid level, so as to ensure that ammonia does not occur. gas leak incident. For example, the patent application with the application number 201810216472.9 ("A Liquid Ammonia Security Control Method") disclos...

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Problems solved by technology

[0005] In order to solve the above technical problems, the present invention proposes a liquid ammonia leakage monitoring method and monitoring system, which obtains the early warning value through a unique algorithm, and in the process of obtaining the early warning value, according to the contribution degree of each monitoring index to the early warning value Generate different early warning signals to achieve hierarchical early warning, thereby avoiding false positives and missed negatives caused by only considering a single monitoring indicator

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