Optical continuous water quality analytical system

Abstract

The invention discloses optical continual water quality analysis system. It includes sampling device, measuring device, and analyzing device. The analyzing device includes diluting device which is formed by measured water sample box, diluting liquid box, and mixing device. Both of the former two are set flow inlet, discharge flow port, and overflow port. And the last one is set flow inlet and discharge flow port. The measured water sample and diluted liquid ran out from the discharge flow port of the measured water sample box and diluting liquid box are flowed into the flow inlet of the mixing device.

Description

technical field [0001] The invention relates to a water quality analysis system, in particular to an optical continuous water quality analysis system. Background technique [0002] like figure 1 As shown, a commonly used water quality COD detection system includes a sampling device 1, a measuring device and an analyzing device 5. The sampling device 1 usually adopts a peristaltic pump; the measuring device includes a measuring cell 3 , an ultraviolet light source 2 , and a light receiving device 4 . The water sample to be measured flows through the measurement pool 3 from bottom to top after being sampled by the peristaltic pump 1, and the ultraviolet light source 2 on one side of the measurement pool 3 emits light. The light receiving device 4 on the side receives it, and the received signal is sent to the analysis device 5 for analysis, and then the COD value in the tested water sample is obtained. Such device also has some deficiencies: 1) measurement range is small; I...

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Problems solved by technology

Such device also has some deficiencies: 1) measurement range is small; In order to measure the water sample that COD is less, need to use longer measuring light path, but at this moment, the water sample of high COD value is too strong to the absorption of ultraviolet light, As a result, the light signal through the water sample is weak or absent, making it impossible to measure; 2) It is impossible or difficult to measure water samples with high concentrations of COD, because it is difficult to design a small measurement optical path, and the pollutants in the water samples will contaminate The measurement window leads to a large relative change in the measurement optical path, thereby reducing the measurement accuracy; 3) The application field of the device is narrow. Due to the limitation of the measurement range and the upper limit of the measurement, it is impossible to complete the water quality analysis in many fields, such as the water at the entrance of the wastewater treatment plant. Water quality analysis, etc.

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