A method for early warning of overheating of organic heat carrier boilers based on gas phase analysis

Abstract

The invention provides a method for early warning of overheating of an organic heat carrier boiler based on gas phase analysis, which relates to the technical field of special equipment safety and includes the following steps: collecting oil and gas samples of organic heat carrier boilers on site; detecting the hydrogen content in the oil and gas samples; finding suspected overheated Boiler, and use the gas detector for online detection and alarm: Among them, step (3) specifically includes: removing the hydrogen stored in the tank at the initial stage of detection before detection: observing the detection value, average value M and Standard deviation σ; when the standard deviation σ is less than 10ppm, take σ=10; set the low alarm threshold, when M>low alarm threshold, and last for more than 15min, the alarm is considered valid; set "M+3σ" as the high When the detection result is greater than the upper alarm threshold and lasts for more than 15 minutes, the alarm is considered valid. The invention can detect overheating and give an accurate warning when the boiler is running, and take measures in time to eliminate hidden dangers.

Description

technical field [0001] The invention relates to the technical field of special equipment safety, in particular to an overheat early warning method for an organic heat carrier boiler based on gas phase analysis. Background technique [0002] The organic heat carrier boiler is a boiler with an organic heat carrier as the operating medium. It has the characteristics of outputting a medium with a high process temperature under the condition of liquid phase low pressure. The temperature of the medium is relatively stable during normal operation. It is widely used in the chemical industry, printing and dyeing, and chemical fiber industries. . Due to the poor thermal stability of organic heat carriers, local over-temperature phenomena often occur during operation. The fire accident rate caused by over-temperature failure of boiler heating surface tubes is about 0.3%, which is about ten times higher than other boiler accident rates. Accidents often cause boiler scrapping, medium fa...

AI Technical Summary

Problems solved by technology

There are the following defects: the quality inspection of organic heat transfer material is cumbersome and time-consuming, and the organic heat transfer material is usually a fluid mixture during boiler operation, and the test results reflect its comprehensive characteristics and historical characteristics at the same time, while the inspection of the heating surface inside the boiler is often It can only be carried out when the boiler is shut down, neither of these two methods can realize the online monitoring of the boiler overheating state, so there is also the problem of low detection accuracy

In addition, the above-mentioned traditional inspection methods need to rely on expensive instruments, such as automatic petroleum product flash point tester (closed), petroleum product carbon residue tester, petroleum product automatic trace carbon residue tester, automatic kinematic viscosity tester, potentiometer Titrator, Karl Fischer titrator, etc., the detection cost is high, and it is not easy to popularize and use

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