Water alkalinity on-line measuring device based on solution image technology and measuring method thereof

Abstract

The invention relates to a water alkalinity on-line detection device, a water alkalinity on-line measuring device based on solution image technology and a measuring method thereof, and is characterized in that according to the invention, based on the detection of solution image RGB values during the titration of water to be detected by a HCl solution, an image RGB value-titration solution volume measuring curve is plotted, and the water alkalinity of the solution to be detected is calculated according to the titration solution volume corresponding to an inflection point of the image RGB value measuring curve. With computer image processing technology, the invention establishes a mathematical model of solution RGB values with the change of the titration solution volume during titration, determines the titration end point automatically, establishes a color constancy algorithm model based on a neural network algorithm, and thus increases the precision and reliability of alkalinity measurement. With the device of the invention, on-line measurement of phenolphthalein alkalinity and total alkalinity can be performed optionally, and the operation is convenient. The device is applicable to industry of electric power, petroleum, chemical industry, metallurgy, etc.

Description

technical field [0001] The invention relates to an online detection device for water quality alkalinity applied in the fields of industrial water treatment and environmental monitoring. Background technique [0002] Alkalinity refers to the total amount of substances in water that can neutralize strong acids, such substances include strong bases, weak bases, strong bases and weak salts, etc. In the field of industrial water treatment, alkalinity is one of the indicators to measure the quality of circulating cooling water and boiler water. During the circulating cooling process of water, due to the evaporation of water, the concentration of dissolved salts, the escape of carbon dioxide, the entry of external pollutants, etc. Reasons, such as scaling, corrosion and bacteria and algae reproduction, will seriously affect the normal operation of the circulating water system, and even cause imbalances in the production process. Among them, the water alkalinity is one of the import...

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