Multi-parameter integrated continuous online monitoring system for water quality of underground water

Abstract

The invention provides a multi-parameter integrated continuous online monitoring system for water quality of underwater. The monitoring system comprises a large barrel fixed on a support, a small barrel is disposed in the large barrel, and the support is provided with a plurality of wheels at the bottom. The large barrel is provided with a water outlet at the bottom, and the small barrel is provided with a water inlet at the bottom. The top of the small barrel is open, top of the small barrel is provided with a barrel cover, and a dissolved oxygen electrode, a conductive electrode, a pH electrode and an ORP (oxidation-reduction potential) electrode penetrate through the barrel cover to extend into the small barrel respectively. Water flow enters from the water inlet at the bottom of the small barrel, overflows from the top of the small barrel and flows out of the water outlet at the bottom of the large barrel. By the design of a flow-through pool of the small barrel sleeved by the large barrel, the electrodes are stretched into the small barrel through the barrel cover of the large barrel, and accordingly water quality to be detected is isolated from the outside so as to reflect truth of water quality. The whole system is designed in a demountable 'handcart' type, so that the monitoring system can move conveniently and flexibly, the handcart can be demounted to conveniently move, and motion operation is facilitated for a user according to the environment.

Description

technical field [0001] The invention belongs to the technical field of groundwater quality monitoring, in particular to a groundwater quality multi-parameter integrated continuous on-line monitoring system. Background technique [0002] With the progress of society and the improvement of environmental requirements, more and more attention has been paid to the prevention and control of groundwater pollution. Groundwater quality analysis and investigation are inevitably involved in the process of groundwater development and protection. Groundwater quality analysis must be done through borehole sampling and analysis. Since the borehole is left to stand for a period of time before groundwater sampling, the water quality in the borehole may change due to contact with air or some physical and chemical changes with non-target water intake layers during this period, so it is necessary to pump out a part of the groundwater before Sampling is taken to reflect the true water quality ...

AI Technical Summary

Problems solved by technology

[0003] At present, the groundwater quality sampling methods that meet this requirement are: one is to directly sample in monitoring wells or boreholes, which cannot ensure the authenticity of groundwater quality; the other is to randomly sample a certain amount of groundwater, which is random. Large, if the amount of water pumped out is small, it cannot reflect the authenticity of groundwater, and if the amount of water pumped out is large, it may waste manpower and financial resources

The monitoring methods for the five environmentally sensitive parameters of pH, ORP, dissolved oxygen, conductivity and temperature are as follows: one is to analyze in the laboratory after sampling, which obviously cannot represent its true value; On-site analysis of a single sample cannot represent its true value; the third is to use a dedicated instrument for independent analysis of each parameter. This method requires a large number of instruments (for example, the monitoring of the above 5 parameters requires 5 instruments), and the cost High, cumbersome operation; the fourth is to carry out intermittent sampling and analysis of the pumped groundwater until the water quality is stable. This method requires multiple sampling and analysis, which is cumbersome to operate and has a large labor load. The analysis after each sampling is out of the online environment, which is difficult. Reflect the authenticity of water quality

The above shows that none of the existing technologies can meet the requirements of groundwater quality analysis.

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