Online monitoring system for COD of high-concentration sewage
A monitoring system and high-concentration technology, which is applied in the direction of test water, measurement devices, and test sample preparation, can solve the problems of dilution device blockage and easy precipitation, etc., to reduce workload, have strong applicability, and ensure reliable operation Effect
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[0021] Such as figure 1 , 2 As shown, a high-concentration sewage COD online monitoring system includes a sampling system, a dilution water flushing system, a COD analyzer 1, and a PLC2. The sampling system includes a sequentially connected sampling water pipe 3 and a manual ball valve-4. , Y-type filter 5, electric ball valve three 6, three-way 18, sampling metering pump 7; the dilution water flushing system includes dilution water flushing water pipe 8 connected in sequence, manual ball valve two 9, electric ball valve one 10, dilution metering Pump 11; the output ends of the sampling metering pump 7 and the dilution metering pump 11 are respectively connected to the upper feed port of the mixing tank 12, and the COD analyzer 1 is sampled from the mixing tank 12; the bottom outlet of the mixing tank 12 is connected to the The electric ball valve two 14 is connected between the drain pipes 13, the third interface of the tee 18 is connected with a manual ball valve three 15 t...
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