Device for treating shale gas wastewater based on disc tube type reverse osmosis membrane

Abstract

The invention discloses a device for treating shale gas wastewater based on a disc tube type reverse osmosis membrane, which comprises a shell. An upper pressing plate and a lower pressing plate are arranged in the shell, a central screw rod is vertically arranged at the central position of the upper pressing plate and the lower pressing plate, and a clear water outlet is formed in the side surface of an upper positioning cushion block above the central screw rod. The upper plane of the upper pressing plate is respectively provided with a water inlet, a flushing water supply pipe and a concentrated solution outlet, the lower pressing plate is provided with a flushing water drainage pipe, an S-shaped flow guide disc and a membrane are arranged between the upper pressing plate and the lower pressing plate, one end of the membrane is horizontally arranged between the clamping blocks, and springs are arranged at the contact positions of the clamping blocks and the membrane. A clear water channel is arranged between the clamping block and the central screw rod, the clear water channel extends upwards to be communicated with a clear water outlet, a plurality of convex points protruding outwards are evenly arranged on the surfaces of the flow guide discs, and the membrane is horizontally arranged between the flow guide discs. The device has the advantages of high pollution rejection rate, good purification effect, long service life of the membrane, easy maintenance, and low investment and operation cost.

Description

technical field [0001] The invention belongs to the technical field of water purification equipment, and in particular relates to a device for treating shale gas wastewater based on a disc tube type reverse osmosis membrane. Background technique [0002] Shale gas is an unconventional natural gas resource with huge geological reserves. The fracturing process of exploiting shale gas requires a large amount of water. Taking a single shale gas horizontal well in the Sichuan Basin of my country as an example, 20,000 to 30,000 square meters of water are required for fracturing. During the exploitation of shale gas, hydraulic fracturing technology is used to break the underground rock formation and release the shale gas in it. The water injected into the formation will flow back at different stages of shale gas production, which is called produced water. . At present, the volume fracturing technology of slick water system and the long-section horizontal well technology are the m...

AI Technical Summary

Problems solved by technology

The produced water flowback stage has complex water components and contains a large amount of polymers. In the produced water, in addition to the produced water components, there are also pollutants such as sediment, and the salinity, mainly sodium chloride, gradually increases. Heavy metals and radioactive elements may be contained in strata in some areas and carried back to the ground with the flowback of produced water. Improper disposal will cause environmental pollution risks to soil and surface water, causing social problems

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