Hydrogen leakage detection alarm and event grade estimation method

Abstract

The invention relates to a hydrogen leakage detection alarm and event grade estimation method, which belongs to the technical field of gas concentration sensing detection. The method comprises the following steps of 1, simulating on-site leakage events in advance, and testing near-end and far-end hydrogen concentration detectors to obtain prior data, 2, obtaining data through a leakage event test,and determining a leakage detection alarm threshold value and an event grade estimation threshold value, and 3, in an operation stage, continuously outputting and detecting records by the near-end detector and the far-end detector, and outputting a final result after condition judgment is carried out on the records and the previously determined alarm threshold value and event grade estimation threshold value. Compared with a traditional mode, the method has the advantages of being rapid in response, reliable in detection result, capable of providing deep machining information and the like, and a good effect is achieved in application.

Description

Technical field [0001] The present invention relates to a hydrogen leak detection alarm and an event level estimate, which belongs to the field of gas concentration detection control technology. Background technique [0002] Hydrogen energy has highlights, sources, clean and environmental protection, etc., many countries have used hydrogen energy as an important energy strategy. However, hydrogen is flammable and explosive, wide combustion range, low ignition energy, high diffusion coefficient, has potential leakage and explosion during preparation, storage, transportation, filling and use, and hydrogen leak detection alarm device is hydrogen energy Important guarantees are also a must-have part. [0003] In the prior art, there is mainly the following problems: first, in response to general slow retardation, hydrogen concentration detector use electrochemical, catalytic combustion or semiconductor type, and the response time is generally up to 30s or even longer, and the actual ...

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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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