A New Sampling Device for COD On-Line Measurement

Abstract

The invention relates to a novel sampling device and a sampling method for online COD (chemical oxygen demand) measurement. An existing online COD detection device adopting an online UV (ultraviolet) method adopts a peristaltic pump sampling system, thereby being unsuitably mounted for wastewater treatment process control. The novel sampling device structurally comprises a water brush transmission rod (3) which is connected with an output shaft of a motor (2) and mounted in a transition seal barrel (5), the output shaft of the motor is connected with a transmission support (6), the transmission support (6) is connected with an injector internal rod (7) which is mounted in an injector (8), the injector is mounted in a main fixing support (9), the upper end of the transition seal barrel is connected with a travel switch mounting frame (11) through a pressing plate (10), the water brush transmission rod is connected with a water brush device (13) with a water brush plate (12), the water brush device is mounted in a frame (14) and is connected with a water connector (16), and the frame is connected with a receiving support (17) and a lamp tube support (18). The novel sampling device and the sampling method are used for online COD measurement sampling.

Description

[0001] Technical field: [0002] The invention relates to a novel sampling device and sampling method for COD on-line measurement. [0003] Background technique: [0004] COD (Chemical Oxygen Demand, chemical oxygen demand) is one of the most important comprehensive indicators of organic pollution in water environment monitoring. COD refers to the amount of oxidant consumed when reducing substances in water are oxidized by strong oxidants under certain conditions, converted into oxygen concentration, in mg / L, and is a comprehensive indicator to characterize reducing substances in water. For the research and evaluation of domestic sewage and industrial wastewater, COD is an extremely important parameter. [0005] At present, most of them are carried out by manual sampling and artificial chemical analysis in the laboratory. This is an isolated and static measurement method with low efficiency and non-real-time. It is difficult to provide accurate and real-time dynamic scientifi...

AI Technical Summary

Problems solved by technology

This is an isolated and static measurement method with low efficiency and non-real-time. It is difficult to provide accurate and real-time dynamic scientific data for water quality monitoring, water environment quality assessment and environmental governance.

The traditional method of monitoring environmental pollution sources by means of manual on-site sampling and laboratory instrument analysis takes a long time to monitor, cannot reflect the status of sewage discharge in time, causes secondary pollution caused by chemical reagents, and requires high maintenance costs.

The existing on-line UV method COD on-line detection devices all use a peristaltic pump sampling system, which is mainly installed at the outlet of the treated sewage outlet. The cost is high and the volume is large, so it is not suitable for installation in the process control of sewage treatment.

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