Online measurement device for chemical boiler cleaning system

Abstract

The invention relates to the field of boiler cleaning and discloses an online measurement device for a chemical boiler cleaning system. The chemical boiler cleaning system comprises a cleaning system main pipeline. The online measurement device comprises a cleaning medium guiding pipeline, a tubular sample clamping portion and an electrochemical workstation, wherein the cleaning medium guiding pipeline is communicated with the cleaning system main pipeline and is arranged to make the flow of a cleaning medium in the cleaning medium guiding pipeline adjustable, the tubular sample clamping portion is arranged on the cleaning medium guiding pipeline to clamp and serially connect a pair of tubular samples into cleaning medium guiding pipeline, the electrochemical workstation is electrically connected with the pair of tubular samples on the tubular sample clamping portion so as to measure the corrosion degree of the tubular samples or the dissolution degree of oxide skin on the inner walls of the tubular samples. The online measurement device for the chemical boiler cleaning system can conduct real-time monitoring on material corrosion in the chemical boiler cleaning process.

Description

technical field [0001] The invention relates to the field of chemical cleaning of boilers, in particular to an on-line measuring device for a chemical cleaning system of a boiler. Background technique [0002] At present, when the boiler chemical cleaning system is used to chemically clean the boiler (including the boiler superheater) of the power station, the coupon weight loss method is used to evaluate the corrosion rate of the material during the chemical cleaning process, but this method has certain limitations. The main reason is that this method can only detect the corrosion of the material after the chemical cleaning is over, so it can only get the average corrosion rate of the material in the entire chemical cleaning process after the chemical cleaning, and it is impossible to detect the corrosion of the material in the chemical cleaning process in real time. From an engineering point of view, real-time monitoring of material corrosion during chemical cleaning is of...

AI Technical Summary

Problems solved by technology

[0002] At present, when the boiler chemical cleaning system is used to chemically clean the boiler (including the boiler superheater) of the power station, the coupon weight loss method is used to evaluate the corrosion rate of the material during the chemical cleaning process, but this method has certain limitations. The main reason is that this method can only detect the corrosion of the material after the chemical cleaning is over, so it can only get the average corrosion rate of the material in the entire chemical cleaning process after the chemical cleaning, and it is impossible to detect the corrosion of the material in the chemical cleaning process in real time. From an engineering point of view, real-time monitoring of material corrosion during chemical cleaning is of great significance. The acquisition of reliable real-time corrosion data is conducive to timely guiding on-site operations and improving the reliability of material corrosion control.

[0003] In addition, during the chemical cleaning process of the boiler, a section of monitoring tube is usually installed in the boiler pipe. After the chemical cleaning is completed, the effect of chemical cleaning can be judged by observing the cleaning state of the scale on the inner wall of the monitoring tube. The end point of chemical cleaning It can be roughly judged by measuring the increase rate of iron content in the cleaning solution and previous chemical cleaning experience. Therefore, it is currently impossible to effectively and accurately judge the cleaning end point during chemical cleaning of the boiler, and it is also impossible to continuously monitor the dissolution of the scale

Images