A hydrogen leak detection alarm and event level estimation method

Abstract

The invention relates to a hydrogen leakage detection alarm and event level estimation method, belonging to the technical field of gas concentration sensing and detection. Step 1. Pre-simulate the on-site leakage event, test the near-end and remote hydrogen concentration detectors to obtain prior data; Step 2, obtain data through the leakage event test, determine the leak detection alarm threshold and event level estimation threshold; Step 3, run In the stage, the near-end and far-end detectors continuously output and detect records, and then output the final result after conditional judgment with the previously determined alarm threshold and event level estimation threshold. Compared with the traditional method, the present invention has the characteristics of quick response, reliable detection result, deep processing information and the like, and obtains good effect in application.

Description

technical field [0001] The invention relates to a hydrogen leakage detection alarm and event level estimation method, belonging to the technical field of gas concentration detection and control. Background technique [0002] Hydrogen energy has outstanding advantages such as convenient storage and transportation, diverse sources, clean and environmental protection, etc. Many countries regard the development of hydrogen energy as an important energy strategy. However, hydrogen is flammable and explosive, has a wide combustion range, low ignition energy, and a large diffusion coefficient. It has potential leakage and explosion hazards during preparation, storage, transportation, filling, and use. Therefore, hydrogen leakage detection and alarm devices are hydrogen energy An important guarantee for the application and a necessary component. [0003] In the prior art, there are mainly the following problems: First, the response is generally slow. The hydrogen concentration dete...

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Problems solved by technology

[0003] In the prior art, there are mainly the following problems: First, the response is generally slow. The hydrogen concentration detectors mostly adopt electrochemical, catalytic combustion or semiconductor type, and the response time is generally as high as 30S or even longer, and the actual site is mostly installed in places where hydrogen is easy to accumulate. At the top, when the detector locally reaches the alarm threshold, a relatively dangerous leakage event may have occurred; second, the range of the existing detectors is too low, and most of them will cause performance degradation and significantly shortened life in an atmosphere with high hydrogen concentration, and even Fault failure; at the same time, there is generally a lack of actual testing of allowable leakage in actual scenarios, targeted determination of alarm thresholds and estimation of leakage event levels

In practice, it is unacceptable to set the threshold too low to cause false alarms and frequent alarms. For example, frequent automatic emergency response measures will affect the continuous operation of production and pay a high additional unnecessary cost.

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