Purification system for micro-polluted raw water and purification method thereof

Abstract

The invention relates to a purification system for micro-polluted raw water, comprising a stripping oil separation tank, a coagulating sedimentation tank, a coagulating chemical dosing device, a first middle water tank, a water feeding pump, a biological aerated filter, a second middle water tank, a coagulating chemical dosing unit, a filtering lift pump, a multi-media filter, a manganese sand filter, an active carbon filter, an acid dosing device, a scale inhibitor dosing device, a mixer, a reverse osmosis device, an alkali dosing device, a disinfection device and an ultraviolet sterilization device. The purification system for micro-polluted raw water disclosed by the invention has the following advantages that: main pollutants are especially removed at first, and then a reverse osmosis technology is used as a safety guarantee; the reverse osmosis pre-treatment is designed adequately, and the operation of the system is safe and stable, so that the occurrence frequency of pollution and blockage phenomena is greatly decreased, chemical cleaning period is greatly prolonged, and the recycling rate of water is up to 75%; and the purification system is suitable for the occasions of treating the drinking water of municipal administration, villages, industrial enterprises and mine fields or for the occasions of reusing the reclaimed water which needs advanced treatment. The invention further refers to a purification method of the purification system for micro-polluted raw water.

Description

technical field [0001] The invention relates to the field of water treatment and purification, in particular to a slightly polluted raw water purification system and a purification method for purifying slightly polluted groundwater, surface water and mine water into drinking water. Background technique [0002] With the rapid development of social economy, the pollution of water resources is becoming more and more serious, especially the pollution of drinking water is particularly prominent, and the safety of water for human daily life is increasingly threatened. In some areas where water resources are scarce, especially remote areas with relatively backward economy, rural areas and areas where water sources are polluted, because the selection and transportation of high-quality water sources require a large amount of investment, the local people and the government cannot afford the investment. The use of surface water or exploited groundwater is directly or simply clarified ...

AI Technical Summary

Problems solved by technology

The drinking water that is supplied in these ways is unsafe and poses potential hazards to the health of users.

[0003] The existing various micro-polluted raw water purification technologies have a relatively single process design, which cannot fully guarantee the ability to provide safe and qualified drinking water for raw water with increasingly complex pollution sources, more and more types of pollutants, and a large fluctuation range of pollutant concentration

[0004] The application of membrane technology has brought about a revolution in water treatment technology, but the widespread application of membrane technology has gradually revealed the shortcomings in the method of use. The removal load of various pollutants is placed on ultrafiltration, nanofiltration, and reverse osmosis membranes. The design of the pretreatment process cannot fully meet the requirements of membrane treatment influent, and it is not able to adapt to the impact caused by the fluctuation of raw water quality, which aggravates the fouling of the membrane, and leads to an increase in the cost of water purification, and the operation of the water purification system is unstable , low utilization of water resources

Images