Membrane filtration pretreatment system of on-line water quality monitor

Abstract

The invention relates to a membrane filtration pretreatment system of an on-line water quality monitor. The membrane filtration pretreatment system is characterized by comprising a filtration device, a control cabinet and the on-line water quality monitor, wherein the filtration device comprises a framework which is immersed in a mixed liquid to be sampled in a reaction cell; filtration nets are arranged around and at the bottom of the framework; a membrane component is arranged in the framework; aeration pipes are arranged below and on one side of the membrane component; an air compressor, a metering pump, a water tank and a time relay are arranged in the control cabinet; a control panel is also arranged on the control cabinet; the air compressor is communicated with the aeration pipes through air pipes; the water inlet end of the metering pump is communicated with the membrane component through a pumping pipe; the water outlet end of the metering pump is communicated with the water tank through a water pipe; the water tank is also communicated with the on-line water quality monitor through a sample injection pipe; the time relay is electrically connected with the metering pump to control the start and the stop of the metering pump; the control panel is electrically connected with the air compressor and the time relay to control the start and the stop of the air compressor and the time relay. The membrane filtration pretreatment system disclosed by the invention can be widely applied to the field of water sample pretreatment.

Description

technical field [0001] The invention relates to an environment monitoring system, in particular to an on-line water quality monitoring instrument membrane filtration pretreatment system. Background technique [0002] Online water quality monitoring instruments can conduct real-time and continuous online monitoring of pollutants in water, which is of great significance for improving the total amount of pollutants control and environmental management capabilities. With the development of science and technology and the improvement of national environmental protection policies, online water quality monitoring instruments have been widely used in actual monitoring, and sewage treatment plants are one of the most widely used fields. By the end of 2011, more than 3,000 urban sewage treatment plants had been built and put into operation across the country, with a treatment capacity of more than 130 million cubic meters per day. A large number of on-line water quality monitoring ins...

AI Technical Summary

Problems solved by technology

However, in practical applications, these pretreatment devices still have problems such as low flux of membrane modules, poor anti-pollution ability and easy damage of membrane modules, which affect their normal use in biochemical units.

Therefore, due to the large maintenance workload (usually 1 to 2 days, the membrane module needs to be fully cleaned once), the working environment of the membrane module lacks protective measures, the replacement cycle of accessories is short, and the cost is high. Large-scale application in biochemical units of sewage plants

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