Device for repairing nitrate pollution in underground water by PRB (Permeable Reactive Barrier) technology

Abstract

The utility model discloses a device for remedying nitrate pollution in underground water by a PRB (permeable reactive barrier) technology, which relates to the technical field of PRB remedying and comprises a base plate, a frame body fixedly mounted at the top of the base plate, a well cover fixedly mounted at the top of the frame body, a cover plate arranged inside the well cover, a sleeve plate fixedly mounted at the bottom of the cover plate and a conveying box fixedly mounted at the top of the base plate. The device has the advantages that ion exchange resin can be injected into the sleeve plate through rotation of the spiral conveying shaft, water can be drained by the material pipe through the drainage plate, underground water can be filtered through the quartz sand filling material layer, the coal ash filling material layer and the activated carbon filling material layer, and the underground water can be recycled. Nitrate in water can be removed through ion exchange resin in the sleeve plate, secondary filtration is completed, on the contrary, when the ion exchange resin needs to be replaced, the motor rotates reversely, the whole structure does not need to be taken out, and practicability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to PRB repair technical field, concretely is a device that PRB technology repairs nitrate pollution in groundwater. BACKGROUND

[0002] At present, groundwater pollution repair technology mainly includes extraction treatment technology, chemical oxidation / reduction technology, biological technology, permeable reaction wall technology (PRB), double / multiple phase extraction technology etc., wherein, extraction, extraction technology etc. need to utilize relevant equipment to extract groundwater to handle again, and the energy consumption is big, and the control cost is high;Chemical, biological etc. related technology needs to add chemical substance or biological colony to groundwater to handle, and can cause secondary pollution;And PRB technology is the pollution treatment system that installs specific reaction medium below the ground, can block the pollution zone, and the pollutant in it is converted into the form that the environment can accept, and does not damage the flow of groundwater, and is widely applied.

[0003] And the filtering efficiency of the filler in the existing PRB filtering device will decrease and disappear after long time use, and needs to be replaced, and different fillers react different impurities, and the service life is also different, and the existing device usually takes out all the fillers during maintenance, and some fillers can continue to be used during taking out, which leads to the complicated maintenance, and therefore the device that PRB technology repairs nitrate pollution in groundwater is provided. UTILITY MODEL CONTENT

[0004] In view of the defects of the prior art, the utility model provides a device that PRB technology repairs nitrate pollution in groundwater, which solves the problems in the background technology.

[0005] To achieve the above object, the utility model realizes the following technical scheme: a device that PRB technology repairs nitrate pollution in groundwater, including the base plate, the top of the base plate is fixedly installed with the frame body, the top of the frame body is fixedly installed with the well lid, the inside of the well lid is provided with the cover plate, the bottom of the cover plate is fixedly installed with the sleeve plate, the top of the base plate is fixedly installed with the conveying box, the top of the conveying box is fixedly installed with the motor, the output end of the motor is fixedly connected with the spiral conveying shaft, the outside of the conveying box is provided with the feeding port, the outside of the conveying box is fixedly installed with the material pipe, and the sleeve plate and the conveying box are all water permeable materials.

[0006] Preferably, the bottom of the cover plate is provided with a quartz sand filler layer, the bottom of the cover plate is provided with a fly ash filler layer, and the bottom of the cover plate is provided with an activated carbon filler layer.

[0007] Preferably, the top of the cover plate is provided with a pull ring.

[0008] Preferably, the two sides of the substrate are fixedly installed with drainage plates, and the two sides of the frame body are provided with through grooves.

[0009] Preferably, the particle size of the quartz sand filler in the quartz sand filler layer is 15 mesh, the particle size of the coal ash filler in the coal ash filler layer is 15 mesh, and the particle size of the activated carbon filler in the activated carbon filler layer is 30 mesh.

[0010] The device for repairing nitrate pollution in groundwater by PRB technology has the following beneficial effects:

[0011] The device for repairing nitrate pollution in groundwater by PRB technology places the cover plate on the top of the well lid, injects the ion exchange resin into the inside of the conveying box through the material pipe, rotates the spiral conveying shaft by the motor, injects the ion exchange resin into the inside of the sleeve plate by the rotation of the spiral conveying shaft, drains water by the drainage plate of the material pipe, filters groundwater by the quartz sand filler layer, the coal ash filler layer and the activated carbon filler layer, removes nitrate in water by the ion exchange resin in the sleeve plate, and completes secondary filtration, and when the ion exchange resin needs to be replaced, the motor is reversed, so that the whole structure does not need to be taken out, and the practicability is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is a structural schematic view of the utility model;

[0013] Fig. 2 It is a front view of the utility model;

[0014] Fig. 3 It is a split schematic view of the utility model.

[0015] In the drawing: 1, substrate; 2, drainage plate; 4, sleeve plate; 5, material port; 6, spiral conveying shaft; 7, pull ring; 8, through groove; 9, well lid; 10, quartz sand filler layer; 11, coal ash filler layer; 12, activated carbon filler layer; 13, cover plate; 14, motor; 15, conveying box; 16, material pipe; 17, frame body. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0017] Embodiment one:

[0018] Please refer to Figs. 1 to 3The utility model provides a technical scheme: a device that PRB technology repairs nitrate pollution in underground water, including base plate 1, the top fixed mounting of base plate 1 has frame body 17, the top fixed mounting of frame body 17 has well lid 9, the inside of well lid 9 is provided with cover plate 13, the bottom fixed mounting of cover plate 13 has sleeve board 4, the top fixed mounting of base plate 1 has delivery box 15, the top fixed mounting of delivery box 15 has motor 14, the output of motor 14 is fixedly connected with spiral conveying shaft 6, the outside of delivery box 15 is provided with material mouth 5, the outside fixed mounting of delivery box 15 has material pipe 16, sleeve board 4 and delivery box 15 are all water -permeable material, the bottom of cover plate 13 is provided with quartz sand filling material layer 10, the bottom of cover plate 13 is provided with fly ash filling material layer 11, the bottom of cover plate 13 is provided with activated carbon filling material layer 12, the top of cover plate 13 is provided with pull ring 7, the both sides of base plate 1 are all fixedly installed with drainage plate 2, the both sides of frame body 17 are all provided with through slot 8, the particle size of quartz sand filling material in quartz sand filling material layer 10 is 15 mesh, the particle size of coal ash filling material in fly ash filling material layer 11 is 15 mesh, the particle size of activated carbon filling material in activated carbon filling material layer 12 is 30 mesh, by placing cover plate 13 to the top of well lid 9, by material pipe 16, ion exchange resin is injected into the inside of delivery box 15, by using motor 14 to drive spiral conveying shaft 6 to rotate, by using spiral conveying shaft 6 rotation can be injected into the inside of sleeve board 4, material pipe 16 can drain water using drainage plate 2, by using quartz sand filling material layer 10, fly ash filling material layer 11, activated carbon filling material layer 12 can filter underground water, using the ion exchange resin in the inside of sleeve board 4 can remove nitrate in water, complete secondary filtration, when needing to replace ion exchange resin, using motor 14 reverse rotation can, do not need to take out the whole structure, improved practicability.

[0019] Summarizing, the device that PRB technology repairs nitrate pollution in underground water, when using, first place cover plate 13 to the top of well lid 9, by material pipe 16, ion exchange resin is injected into the inside of delivery box 15, by using motor 14 to drive spiral conveying shaft 6 to rotate, by using spiral conveying shaft 6 rotation can be injected into the inside of sleeve board 4, material pipe 16 can drain water using drainage plate 2, by using quartz sand filling material layer 10, fly ash filling material layer 11, activated carbon filling material layer 12 can filter underground water, using the ion exchange resin in the inside of sleeve board 4 can remove nitrate in water, complete filtration work.

[0020] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A device for remediating nitrate contamination in groundwater using PRB technology, comprising a substrate (1), characterized in that: A frame (17) is fixedly installed on the top of the base plate (1), a manhole cover (9) is fixedly installed on the top of the frame (17), a cover plate (13) is provided inside the manhole cover (9), a sleeve plate (4) is fixedly installed at the bottom of the cover plate (13), a conveyor box (15) is fixedly installed on the top of the base plate (1), a motor (14) is fixedly installed on the top of the conveyor box (15), a spiral conveying shaft (6) is fixedly connected to the output end of the motor (14), a material port (5) is opened on the outside of the conveyor box (15), a material pipe (16) is fixedly installed on the outside of the conveyor box (15), and both the sleeve plate (4) and the conveyor box (15) are made of water-permeable material.

2. The apparatus for remediating nitrate contamination in groundwater using PRB technology according to claim 1, characterized in that: The bottom of the cover plate (13) is provided with a quartz sand filling layer (10), the bottom of the cover plate (13) is provided with a fly ash filling layer (11), and the bottom of the cover plate (13) is provided with an activated carbon filling layer (12).

3. The apparatus for remediating nitrate contamination in groundwater using PRB technology according to claim 1, characterized in that: The top of the cover plate (13) is provided with a pull ring (7).

4. The apparatus for remediating nitrate contamination in groundwater using PRB technology according to claim 1, characterized in that: Both sides of the substrate (1) are fixedly installed with a flow guide plate (2), and both sides of the frame (17) are provided with through slots (8).

5. The apparatus for remediating nitrate contamination in groundwater using PRB technology according to claim 2, characterized in that: The quartz sand filler in the quartz sand filler layer (10) has a particle size of 15 mesh, the fly ash filler in the fly ash filler layer (11) has a particle size of 15 mesh, and the activated carbon filler in the activated carbon filler layer (12) has a particle size of 30 mesh.

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