Online statistical method for abnormal conditions of high-temperature heated surfaces of thermal power plant DCS boilers

Abstract

The invention relates to an online statistical method for the abnormal conditions of the high-temperature heated surfaces of thermal power plant DCS boilers. The method comprises the following steps of (1) collecting field data, and transmitting the data to a DCS real-time database; (2) processing the date, specifically, 1 determining an alarm constant value, and storing the alarm constant value in the DCS real-time database, 2 judging the abnormal conditions of the temperature of pipe walls, namely determining whether the current temperature of the pipe walls is in an over-temperature condition or not, generating Boolean type intermediate variable b, and storing the Boolean type intermediate variable b in the DCS real-time database,3 recording the maximum value of the temperature of the pipe walls in real time, and storing the maximum value in the DCS real-time database; (3) generating a report, specifically generating statistics of the abnormal conditions of the temperature of the pipe walls of all the high-temperature heated surfaces of every boilers; (4) checking the report, specifically checking the abnormal conditions of the high-temperature heated surfaces of the boilers, and regulating and controlling the operation process conditions; and (5) exporting the report, specifically exporting the statistics of the abnormal conditions of the temperature of the pipe walls of the heated surfaces in an EXCEL format. According to the method, the comprehensive application of a DCS is expanded, online statistic collecting of the abnormal conditions of the temperature of the pipewalls of the high-temperature heated surfaces of the boilers is realized, and the real-time performance of important parameter analysis is improved.

Description

technical field [0001] The invention belongs to the technical field of automatic detection and management of equipment, relates to a statistical and monitoring method for a boiler in a thermal power plant, and in particular to an online statistical method for abnormal conditions of a high-temperature heating surface of a boiler based on a DCS system. Background technique [0002] Boiler is one of the most important equipment of thermal power plant unit, so it is very important to ensure its safe and stable operation. At present, the "four-tube blasting" is the most frequent boiler accident. Since the reheater has been working in a harsh environment for a long time, the number of over-temperature and tube bursts accounts for the largest proportion. According to statistics, tube explosion accidents on the high-temperature heating surface of boilers account for more than 60 percent of boiler accidents. A pipe burst accident will reduce the availability of equipment and increas...

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Problems solved by technology

This patent realizes the online monitoring of the safety of the high-temperature heating surface of the power plant boiler, but the personnel on duty cannot grasp the abnormal situation of the high-temperature heating surface in time and analyze the important parameters

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