An online residual chlorine sensor with self-cleaning device

Abstract

The present invention relates to an on-line residual chlorine sensor with a self-cleaning device, the on-line residual chlorine sensor comprises a constant current device, a T-tee, a three-way solenoid valve and a flow-through cell, the beneficial effects are as follows: 1) physical grinding and hydrochloric acid washing are performed interactively, the physical grinding strength is controllable, performance is improved, effect is better, and the on-line residual chlorine sensor is fully automatic and controllable; 2) the micro constant current device can ensure a smaller volume, meanwhile substantially increases the output end pressure, and increases the load capacity to increase the reliability of a waterway, and the constant current device rear end waterway may not cutoff; and 3) the constant current device flow rate is affected by earth gravity, liquid level difference and the water flow pipe diameter section, influence on performances are in linear relation, and analysis, debugging, testing and use are facilitated.

Description

technical field [0001] The invention relates to a residual chlorine sensor, in particular to an online residual chlorine sensor, which belongs to the technical field of sensors. Background technique [0002] In the field of on-line residual chlorine measurement, a constant voltage residual chlorine sensor is usually used for measurement. The constant voltage residual chlorine sensor works by relying on two platinum rings on the electrode to carry out redox reaction. When impurities are attached to the platinum ring, the output signal of the electrode will change and the working state of the electrode will be changed. [0003] In order to obtain stable residual chlorine measurement results during the continuous operation of the electrode, it is necessary to add a corresponding cleaning device. At present, the combination of manual grinding and hydrochloric acid cleaning is mainly used to solve this problem. Manual grinding: regularly use metallographic sandpaper to grind the ...

AI Technical Summary

Problems solved by technology

[0003] In order to obtain stable residual chlorine measurement results during the continuous operation of the electrode, it is necessary to add a corresponding cleaning device. At present, the combination of manual grinding and hydrochloric acid cleaning is mainly used to solve this problem. Manual grinding: regularly use metallographic sandpaper to grind the electrode, To ensure that the surface of the electrode is fully polished and remove the attachments on the surface; hydrochloric acid cleaning: soak the electrode in 5% dilute hydrochloric acid for 10 seconds, then take it out, wash it with clean water, and dry it with a soft cloth. The following disadvantages: 1) During manual grinding, if ordinary sandpaper is used, the electrode will be worn a lot, resulting in severe wear of the platinum ring and greatly reducing the life of the electrode; 2) Manual grinding and hydrochloric acid cleaning require the electrode to be disassembled. Convenient, or inconvenient location for staff to access, will lead to maintenance difficulties; 3) Manual cleaning is a waste of manpower, and the interval between two cleanings is long. influences

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