Device for efficiently removing nitrate from underground water

Abstract

The utility model discloses a device for efficiently removing nitrate in underground water, which comprises a tank body, the tank body comprises a tank body upper part and a tank body bottom part, flanges are arranged at the joints of the tank body upper part and the tank body bottom part, a quartz sand cushion layer is arranged in one side of the tank body at the tank body bottom part, and a resin layer is arranged on one side of the tank body above the quartz sand cushion layer; the utility model has the following advantages: the quartz sand cushion layer, the resin layer and the microbial filler layer are additionally arranged in the tank body, and underground water enters the tank body in a bottom-in and top-out manner; nitrate in underground water is degraded into nitrogen through denitrification of the exchange resin layer and the microbial filler layer, the nitrogen is intensively discharged through the nitrogen discharge port, subsequent collection is facilitated, the integration level is high, the occupied space is effectively reduced, and the practicability is high.

Description

Technical Field

[0001] This utility model relates to the technical field of groundwater nitrate removal devices, specifically to a highly efficient device for removing nitrates from groundwater. Background Technology

[0002] Over the years, excessive use of chemical fertilizers and pesticides, along with sewage discharge, has led to excessive nitrate levels in shallow groundwater in rural areas. Nitrates are converted into nitrites in the human body, which can cause methemoglobinemia and produce carcinogens in infants. High nitrate levels can trigger acute illnesses, even leading to hypoxia and death, necessitating purification measures. Domestic and international methods for treating groundwater with excessive nitrate levels mainly include ion exchange, reverse osmosis, and biological methods. Chinese patent CN212269790U discloses a highly efficient nitrate removal device for groundwater, specifically relating to the field of groundwater nitrate removal. It includes a nitrate-removing filter, with a primary aeration purification tank on one side and a secondary filtration purification tank on the other side. This invention employs a denitrification biological filter, a primary aeration purification tank, and a secondary filtration purification tank. During operation, groundwater is introduced into the denitrification filter via an inlet pipe. The denitrification filter utilizes lightweight, porous spherical ceramic particles as the filter media, with added sucrose as the carbon source. The surface is enriched with numerous functional microorganisms to remove nitrate nitrogen from the water. The water then flows into the primary aeration purification tank to remove residual organic matter, followed by the secondary filtration purification tank to remove suspended solids. Finally, ultraviolet disinfection equipment is used. This simple and reliable process effectively inactivates microorganisms in the water. Using this process to treat groundwater ensures that the effluent meets quality standards.

[0003] The existing technologies described above have the following shortcomings: although they can remove nitrates from groundwater, the equipment requires a large space, making it inconvenient to centrally discharge the nitrogen gas generated during degradation and hindering subsequent collection. Therefore, this paper proposes a highly efficient device for removing nitrates from groundwater to solve these problems. Utility Model Content

[0004] To solve the problems mentioned above, the technical solution adopted by this utility model is: a highly efficient device for removing nitrates from groundwater, comprising: a tank body, the tank body including an upper part and a bottom part, flanges provided at the connection between the upper part and the bottom part of the tank body, a quartz sand pad layer provided inside the tank body on one side of the bottom part, a resin layer provided on the side of the tank body above the quartz sand pad layer, and a microbial packing layer provided above the resin layer.

[0005] As a preferred embodiment of this utility model, the tank body is provided with a water outlet on one side of the upper part of the tank body, and one end of the water outlet is connected to a wire-wound water collector, and the water outlet is located above the microbial packing layer.

[0006] As a preferred embodiment of this utility model, a nitrogen vent is provided at the top of the upper part of the tank, and the nitrogen vent is connected to the inside of the tank.

[0007] As a preferred technical solution of this utility model, a filler inlet is provided on the upper part of the tank, above the side opposite to the water outlet, and a sediment discharge outlet is provided on the lower side of the bottom of the tank. Both the filler inlet and the sediment discharge outlet are connected to a sealing cap by screws.

[0008] As a preferred embodiment of this utility model, a water inlet is provided at the bottom center of the tank body, and the water inlet is connected to the inside of the tank body.

[0009] As a preferred embodiment of this utility model, the bottom of the tank is provided with support legs, and the number of support legs is three.

[0010] This utility model has the following advantages: By adding a quartz sand pad layer, a resin layer, and a microbial packing layer inside the tank, and by introducing groundwater into the tank through a bottom-in, top-out method, the denitrification of nitrates in the groundwater by the exchange resin layer and the microbial packing layer degrades the nitrogen gas into nitrogen gas, which is then discharged through the nitrogen gas outlet, facilitating subsequent collection. It has a high degree of integration, effectively reduces the space occupied, and is highly practical. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention;

[0012] Figure 2 This is a schematic diagram of the internal structure of the tank according to a preferred embodiment of the present invention;

[0013] Figure 3 This is a schematic diagram of the connection structure between the water outlet and the wire-wound water collector in a preferred embodiment of this utility model.

[0014] Explanation of reference numerals in the attached drawings: 1. Upper part of the tank; 2. Bottom of the tank; 3. Flange; 4. Quartz sand pad; 5. Resin layer; 6. Microbial packing layer; 7. Water outlet; 8. Wire-wound tube water collector; 9. Nitrogen vent; 10. Packing material addition port; 11. Sedimentation discharge port; 12. Water inlet; 13. Support leg. Detailed Implementation

[0015] The technical solution of this utility model will now be clearly and completely described in conjunction with the accompanying drawings. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Please refer to the following: Figures 1-3 This utility model discloses a highly efficient device for removing nitrates from groundwater, comprising: a tank body, the tank body including an upper part 1 and a bottom part 2, a flange 3 at the connection between the upper part 1 and the bottom part 2, a quartz sand pad 4 inside the tank body located on one side of the bottom part 2, a resin layer 5 above the quartz sand pad 4, and a microbial packing layer 6 above the resin layer 5.

[0019] A water outlet 7 is provided on one side of the upper part 1 of the tank body. One end of the water outlet 7 is connected to a wire-wound water collector 8. The water outlet 7 is located above the microbial packing layer 6. A nitrogen vent 9 is provided at the top of the upper part 1 of the tank body. The nitrogen vent 9 is connected to the inside of the tank body. A packing material addition port 10 is provided on the side opposite to the water outlet 7 of the upper part 1 of the tank body. A sedimentation discharge port 11 is provided on one side of the lower end of the bottom 2 of the tank body. Both the packing material addition port 10 and the sedimentation discharge port 11 are connected to a sealing cap by screws. A water inlet 12 is provided in the middle of the bottom end of the bottom 2 of the tank body. The water inlet 12 is connected to the inside of the tank body. Three support legs 13 are provided at the bottom end of the bottom 2 of the tank body. The water to be treated enters the tank through inlet 12, automatically flows upwards, and then passes through the quartz sand pad layer 4 for preliminary filtration of impurities. It then passes through the resin layer 5 for further filtration. The filtered water enters the microbial packing layer 6, where microorganisms degrade nitrates in the groundwater into nitrogen gas, which is then discharged through the nitrogen vent 9, thus achieving the effect of nitrate degradation.

[0020] The above are merely preferred embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

[0021] All other parts of this utility model that are not described in detail belong to the prior art, and therefore will not be described in detail here.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A highly efficient device for removing nitrates from groundwater, comprising: The tank body is characterized in that the tank body includes an upper part (1) and a bottom part (2), a flange (3) is provided at the connection between the upper part (1) and the bottom part (2), a quartz sand pad (4) is provided inside the tank body on one side of the bottom part (2), a resin layer (5) is provided on the side of the tank body above the quartz sand pad (4), and a microbial packing layer (6) is provided above the resin layer (5). The upper part (1) of the tank body is provided with a filler inlet (10) above the outlet (7) on the opposite side. The bottom (2) of the tank body is provided with a sediment discharge outlet (11) on the lower side. The filler inlet (10) and the sediment discharge outlet (11) are both connected to a sealing cap by screws.

2. The highly efficient nitrate removal device for groundwater as described in claim 1, characterized in that, The tank body has an outlet (7) on one side of the upper part (1), and one end of the outlet (7) is connected to a wire-wound water collector (8). The outlet (7) is located above the microbial packing layer (6).

3. The highly efficient nitrate removal device for groundwater as described in claim 1, characterized in that, The upper part (1) of the tank is provided with a nitrogen vent (9), which is connected to the inside of the tank.

4. The highly efficient nitrate removal device for groundwater as described in claim 1, characterized in that, A water inlet (12) is provided at the bottom center of the tank (2), and the water inlet (12) is connected to the inside of the tank.

5. The highly efficient nitrate removal device for groundwater as described in claim 1, characterized in that, The bottom (2) of the tank body is provided with a support leg (13), and the number of the support legs (13) is three.

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