Integrated device and method used for detecting COD (Chemical Oxygen Demand) and cleaning cuvette automatically

Abstract

The invention discloses an integrated device and method used for detecting COD (Chemical Oxygen Demand) and cleaning a cuvette automatically. A water spraying structure is arranged at an upper opening part of the cuvette; the upper part of the water spraying structure is connected to an automatic pump through a water flow guide pipe; through the water flow guide pipe, the automatic pump is respectively connected to a distilled water bottle containing distilled water after passing through a distilled water electromagnetic valve and a cleaning agent bottle containing a cleaning agent after passing through a cleaning agent electromagnetic valve; ultrasonic cleaning devices are tightly adhered at the outer sides of two pieces of ground glass of the cuvette; and an optical detection device is arranged aside the optical outer side surface of the cuvette. A single-chip control system controls the distilled water electromagnetic valve, the cleaning agent electromagnetic valve, a waste liquid pond electromagnetic valve, the ultrasonic cleaning devices, the optical detection device and the automatic pump to work; the distilled water or cleaning agent is input and sprayed on the inner wall of the cuvette; the cuvette is cleaned with the cooperation of the ultrasonic cleaning device; and after the cleaning, the COD detection is finished when a photoelectric detection device works. Therefore, the cleaning quality is guaranteed, an exact and reliable measuring value is obtained, and a high automation degree is achieved.

Description

technical field [0001] The invention relates to COD (chemical oxygen demand) detection technology and a cleaning device for a COD detection cuvette, in particular to a device for automatic cleaning of a COD detection cuvette and a device for automatic detection of COD, a cuvette cleaning method, and a COD cuvette cleaning method. Detection method. Background technique [0002] Chemical oxygen demand (COD) is an important index to evaluate the degree of water pollution. At present, commonly used COD detection and analysis methods include rapid digestion method, spectrophotometer method, colorimetric method, etc., and these detection and analysis methods all involve the use, maintenance and cleaning of cuvettes. Whether the cuvette is clean or not is one of the factors that affect the accuracy of COD determination. The principles of cuvette cleaning are: first, the structure and light transmission performance of the cuvette should not be damaged, and second, the cuvette can ...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defective of prior art, provide a kind of with single-chip microcomputer control system, apply ultrasonic cleaning technology to the online automatic cleaning of COD detection cuvette and the integrated integrated device of online automatic detection COD, solve The problems of unclean cleaning of the inner wall of the cuvette and poor measurement accuracy of COD; another object of the present invention is to provide the online automatic cleaning method of the cuvette and the online automatic detection method of COD, so as to realize the automatic cleaning of the cuvette and the detection of COD. Accurate detection online, reducing manual operations, shortening cleaning and detection time, and saving costs

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