Device for concentrating and separating colloid in underground water

Abstract

The invention discloses a device for concentrating and separating colloid in underground water. The device comprises a left-end sealing cover, a right-end sealing cover and a separating device positioned between the left-end sealing cover and the right-end sealing cover; the left-end sealing cover, the separating device and the right-end sealing cover are connected with each other in turn through fastening bolts; one side, far away from the separating device, of the right-end sealing cover is provided with a liquid inlet; one side, far away from the separating device, of the left-end sealing cover is provided with a liquid outlet; a first sealing ring is arranged between the right-end sealing cover and the separating device; one side, close to the right-end sealing cover, of the first sealing ring is provided with a first filtering film; a second sealing ring is arranged between the left-end sealing cover and the separating device; one side, far away from the left-end sealing cover, of the second sealing ring is provided with a second filtering film; and the aperture size of the first filtering film and the aperture size of the second filtering film range from 1 to 450nm and the aperture size of the first filtering film is greater than the aperture size of the second filtering film. The device can concentrate and separate colloid substances in an underground water system in real time, effectively, conveniently and fast.

Description

technical field [0001] The invention relates to a separation device, in particular to a device for concentrating and separating colloids in underground water. Background technique [0002] In the past ten years, the research on the transport of pollutants promoted by colloids in groundwater has changed some of the previous understandings on the transport of pollutants in groundwater. The concentration of colloids in groundwater ranges from a few milligrams to several hundred milligrams per liter, including inorganic colloids such as silicate, aluminosilicate, various chlorides (iron, chlorine, silicon, manganese, etc.), calcium carbonate, etc. Hu Min Organic colloids and inorganic-organic complexes such as acid and fulvic acid. The separation effect of colloids in groundwater directly affects people's understanding of the transport, action mechanism and transformation behavior of pollutants in groundwater. At present, the common colloidal separation methods mainly include ...

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Problems solved by technology

[0009] The physical method of separating colloidal particles maintains the original characteristics of colloidal particles to a certain extent, and does not use other chemical reagents. It is in line with the current concept of "green, environmental protection, and economical" advocated by the country, but there are many problems in it, such as microwave Treatment, magnetization treatment, and ultrasonic treatment have the problem that the treatment effect is not very good. When dealing with groundwater with low colloid content, the treatment effect is not ideal; at the same time, these methods have used Some high-power instruments and equipment are contrary to the concept of low-carbon economy advocated by the state

Membrane separation technology, the separation effect is more obvious, but it also has certain shortcomings: the colloid after separation is attached to the filter membrane, which will cause a certain loss during recovery; and because the pore size of the membrane is fixed, it can only be separated. All colloidal particles larger than the membrane pore size, so the selectivity is low; and the separated colloid, dissolved in the eluent after elution, has changed the external liquid phase environment of the original colloid to a certain extent, so it also makes the original colloid The properties of colloids have changed

[0016] The chemical method for colloid separation has the advantages of high efficiency, short time, and good treatment effect, but the chemical method generally needs to add certain chemical reagents for colloid separation. Therefore, its disadvantage is that it will cause secondary pollution, and the chemical reagents added at the same time change The nature of the original colloidal solution, which also changes the properties of the colloidal particles

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