COD (chemical oxygen demand) online monitoring instrument
A technology of monitor and photoelectric detector, applied in the direction of instruments, analytical materials, etc., can solve the problems of high reagent cleanliness, frequent maintenance, errors, etc., and achieve low reagent consumption, low maintenance, and low failure. rate effect
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[0018] The above scheme will be further explained below in conjunction with the drawings and examples.
[0019] Implementation example figure 1 , A COD online monitor, including a sample and reagent storage device and a reaction device connected to the control pipeline of a PLC control system, and a photoelectric metering tube 2 connected to the control pipeline, and a piston for injection is arranged outside the pipeline Pump 1, the sample and reagent storage device includes a water sample bottle 31 which is selectively opened and closed by a multi-way valve 3, a zero point standard solution bottle 32, a COD standard solution bottle 33, a masking agent solution bottle 34, an oxidant solution bottle 35, and a catalyst solution bottle 36. Multi-way valve 3 chooses to open and close water sample or reagent pipeline to control sample injection. The reaction device includes a heating wire 45, a digestion colorimetric tube 4, a fan 41, a colorimetric light source 42, and an upper sol...
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