Research Of Risk Source Analysis And Safety Control For Natural Gas Conversion

Alongside the advance of process of urban modernization, the gas industry of china has entered upon a rapidly developmental stage. The setup of gas system has come into being, which is dominated by the pipeline gas supplying system and assisted by bottled gas system. There exist many kinds of gas source of the pipeline gas supplying system, mainly as water gas, liquefied petroleum gas, and natural gas. With the implementation of the gas project, such as"The Gas Transportation from the West to the East of China","The Russia's Supply of Gas for its Southern Neighboring Countries", etc. natural gas gradually becomes the main gas source in the city. In the view of the advantageous characteristics of natural gas beyond that of other gases, the project of conversion from other gases to natural gas has been sequentially implemented all over the country. Owing to the explosibility, combustibility, and even toxicity of the gases, within the pipeline gas supplying system there inevitably exist the sources of lurking danger. On the grounds that the composition and running pressure varies from different gas sources as one kind of gas source is converted into another, the safety of pipeline gas supplying system should come into more vigorous request.In consequence of the introduction of LNG (Liquefied Natural Gas) from GuangDong province, the clean natural gas has been widely used in ShenZhen. Since the gas source used in ShenZhen is pare liquefied petroleum gas, of which the composition and running pressure is vastly different from that of natural gas, it is necessary to carry out the work of gas conversion. The gas in natural belongs to dangerous material of explosibility and combustibility, which increases the dangerous in the course of conversion. In order to provide against the occurrence of accidents, it is compelling to discriminate the source of danger in the course of gas conversion and arrive at an effective conclusion upon the analysis.By the methods and principles of the fault tree analysis in the safety system engineering, this article systematically, as well as comprehensively comments on and analyses the possible of arising from the pipeline gas supplying system in the course of gas conversion. Upon the analysis of the fault tree, the would-be sources of danger generated from the gas conversion and the one existing in the above-said pipeline gas supplying system can be consequently discriminated, upon the foundation of which the diagram of fault tree and mathematical model are established and quantitatively, as well...