Water quality online monitoring instrument flat membrane pretreatment system

Abstract

The present invention relates to a water quality online monitoring instrument flat membrane pretreatment system, comprising: a control cabinet shell, a pretreatment device arranged inside the controlcabinet shell, a sampling device, an aeration pump, a diaphragm pump, a solenoid valve device and an automatic control system; wherein the pretreatment device is connected to a raw water source, a tapwater source and a subsequent wastewater treatment device through a raw water inlet pipe, a tap water inlet pipe and a drainage pipe, and is connected to the aeration pump and the diaphragm pump through an air pipe and a water pumping pipe respectively; the sampling device is arranged between a pretreatment device and a water quality online monitoring device, and the sampling port of the samplingdevice is connected with the water outlet of the diaphragm pump, the sampling port is connected with at least one water quality online monitoring device, and a water drainage is connected with the subsequent wastewater treatment device; the automatic control system is connected to the aeration pump, the diaphragm pump and the solenoid valve device for automatic or manual control over the aerationpump, the diaphragm pump and the solenoid valve device. The system can be widely used in the field of sample pretreatment for water quality monitoring.

Description

technical field [0001] The invention relates to a flat membrane pretreatment system of an online water quality monitoring instrument, belonging to the field of sample pretreatment for water quality monitoring. Background technique [0002] The actual use environment of online water quality monitoring instruments is mostly surface water, and the water body has a high sediment content. Particulate impurities in water samples will block the sampling pipeline and affect the transmission of optical signals, which will have a considerable impact on the test accuracy and stability of the instrument. Therefore, effective measures must be taken to filter the water samples before they can enter the sampling system of the online monitoring instrument. Most of the traditional filtration methods for online water quality monitoring instruments are hollow fiber membrane filtration. The disadvantages of this method are that the membrane resistance is large, the water production per unit ar...

AI Technical Summary

Problems solved by technology

Most of the traditional filtration methods for online water quality monitoring instruments are hollow fiber membrane filtration. The disadvantages of this method are that the membrane resistance is large, the water production per unit area is small, the membrane pores are easy to block and difficult to clean, and the application will greatly increase the maintenance of pretreatment equipment. The workload cannot guarantee the high-frequency testing and long-term stable operation of the water quality online monitoring instrument

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