Chlorine micro water analyzer is an instrument used to detect the trace moisture content in chlorine gas, widely used in industries such as chlor alkali, petrochemical, and semiconductor.
working principle
Electrolysis method: Based on Faraday's law of electrolysis, the moisture content is calculated by measuring the amount of electricity consumed by electrolyzing the fully vaporized liquid chlorine. During the electrolysis process, water reacts on the electrode, and the amount of electricity consumed is proportional to the water content.
Phosphorus pentoxide (P ₂ O ₅) method: Utilizing the high hygroscopicity of phosphorus pentoxide, water reacts with it to generate phosphoric acid, while releasing hydrogen gas. By measuring changes in electrolysis current or reaction products, a balance relationship between moisture content and electrical signals can be established to achieve accurate detection.
advantage
High precision and high sensitivity: The electrolysis method produces hydrogen and oxygen by electrolyzing water molecules, and the current signal is strictly proportional to the moisture content. The full range accuracy can reach ± 1%, and the repeatability error is ≤± 0.1%. It can detect moisture content as low as ppm. The pentoxide method utilizes hygroscopicity to establish a balance between electrolytic current and moisture, and also has high-precision characteristics.
Quick response: The electrolysis method usually has a response time of less than 1 second, and the T50 response time is less than 8 seconds, meeting real-time monitoring requirements; Although the equilibrium time of the pentoxide method is slightly longer, modern instruments have significantly shortened the response cycle through optimized design.
Strong corrosion resistance: In response to the strong corrosiveness of chlorine gas, the instrument uses corrosion-resistant materials (such as platinum or rhodium electrodes, glass cylindrical sensors) to ensure long-term stability.
Operating standards and safety precautions
Strictly follow the operating procedures
Chlorine gas has strong corrosiveness and toxicity, and operators need to have professional experimental skills and safety awareness.
Exhaust pipe treatment
The exhaust pipe must be connected to a sodium hydroxide solution neutralization device to prevent chlorine gas leakage.
Regular maintenance and calibration
Regularly inspect the sensor electrode film layer and perform regeneration treatment if necessary to ensure measurement accuracy.
personal protection
Wear a gas mask, protective gloves, and lab coat during operation to avoid direct contact with chlorine gas.