Monitoring method and device for real-time working condition of catalytic reforming device

Abstract

The invention provides a monitoring method for real-time working conditions of a catalytic reforming device, wherein the method comprises the steps: constructing a historical data set according to historical data of the catalytic reforming device; calculating a control limit value for judging whether the working condition of the catalytic reforming device is abnormal or not according to the historical data set; acquiring real-time operation data of the catalytic reforming device, and acquiring a real-time result of working condition monitoring based on the real-time operation data; obtaining acomparison result of the real-time result and the control limit value, judging whether the working condition is abnormal or not according to the comparison result, and obtaining an abnormal reason ifthe working condition is abnormal; and directly analyzing and calculating a control limit value for judging whether the working condition is abnormal or not from the historical data, and judging thereason of the abnormal working condition by constructing a directed graph. Compared with a mode of setting fixed limitation purely according to experience, the abnormal condition of the real-time working condition can be judged more comprehensively and quickly, and the defect of improper setting of the fixed limitation is avoided.

Description

technical field [0001] The invention belongs to the field of petrochemical condition monitoring, and in particular relates to a monitoring method and device for real-time working condition of a catalytic reforming device. Background technique [0002] The catalytic reforming unit is one of the main units of petroleum refining. Its main process is to convert naphtha into aromatics and high-octane gasoline through complex catalytic reactions and by-product hydrogen. Most of the products and production units have flammable, flammable To ensure the smooth and safe operation of the reforming unit and product quality, it is necessary to monitor the abnormal conditions of the working conditions in real time and remind the operators to intervene to avoid safety accidents. [0003] At present, the catalytic reforming unit mainly relies on the conventional DCS monitoring and alarm system for real-time monitoring of working conditions. Its main defect lies in the use of fixed limit ala...

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Problems solved by technology

[0003] At present, the catalytic reforming unit mainly relies on the conventional DCS monitoring and alarm system for real-time monitoring of working conditions. Its main defect lies in the use of fixed limit alarms. Since the fixed limits are often set artificially, if the setting is improper, there will be a large number of invalid Alarm events, on the one hand, it is easy to form alarm floods that cannot be dealt with in an effective time; on the other hand, a large number of invalid alarm events will make operators relax their vigilance and ignore potential risk factors

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