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In order to accurately grasp the operation of each treatment link of sewage treatment, it is necessary to monitor the relevant parameters entering each structure
.
Some measurement of these parameters requires manual testing, and some can be automatically detected by instruments
.
COD online analyzer is one of the important instruments to automatically detect water quality
.
What is the working principle of the COD measuring instrument used to measure the important data of sewage treatment? Let's take a look at the working principle of COD online monitoring
.
According to the regulations, a COD online analyzer must be installed at the final discharge outlet.
This analyzer is to systematically and programmatically realize the working principle of a common COD analyzer through the laboratory analysis process of COD.
The water sample is lifted from the discharge open channel to the influent fine filter sampling cup by the self-priming pump, and then the water sample is lifted into the reaction chamber by the influent peristaltic pump P1
.
Then, potassium dichromate, sulfuric acid-silver sulfate and distilled water are respectively extracted into the reaction chamber by peristaltic pumps P2, P3, and P4 in sequence
.
After the sample injection, start microwave heating for 5 minutes (the heating time can be set and modified by yourself), after the heating is completed, inject distilled water to dilute and cool to room temperature, and then blow the mixture to the measuring chamber by the air pressure pump for measurement, and automatically calculate and display measurement results
.
Finally, the mixed liquid is discharged by the air pump and the pipeline is purged to enter the next measurement cycle
.
The whole cycle process is controlled by PLC and is carried out automatically
.
.
Some measurement of these parameters requires manual testing, and some can be automatically detected by instruments
.
COD online analyzer is one of the important instruments to automatically detect water quality
.
What is the working principle of the COD measuring instrument used to measure the important data of sewage treatment? Let's take a look at the working principle of COD online monitoring
.
According to the regulations, a COD online analyzer must be installed at the final discharge outlet.
This analyzer is to systematically and programmatically realize the working principle of a common COD analyzer through the laboratory analysis process of COD.
The water sample is lifted from the discharge open channel to the influent fine filter sampling cup by the self-priming pump, and then the water sample is lifted into the reaction chamber by the influent peristaltic pump P1
.
Then, potassium dichromate, sulfuric acid-silver sulfate and distilled water are respectively extracted into the reaction chamber by peristaltic pumps P2, P3, and P4 in sequence
.
After the sample injection, start microwave heating for 5 minutes (the heating time can be set and modified by yourself), after the heating is completed, inject distilled water to dilute and cool to room temperature, and then blow the mixture to the measuring chamber by the air pressure pump for measurement, and automatically calculate and display measurement results
.
Finally, the mixed liquid is discharged by the air pump and the pipeline is purged to enter the next measurement cycle
.
The whole cycle process is controlled by PLC and is carried out automatically
.
