NL2030379B1 - Novel aeration zone leaching experimental device - Google Patents

Abstract

The embodiment of the utility model provides a novel aeration zone leaching experimental device, which comprises: a water supply and water level control system, 5 used for providing a constant water head and counting the flow of water entering and exiting the device; a soil column system, used for bearing and containing a device for simulating the soil body of the aeration zone under the natural environment, and water intake of different layers can be realized, the water supply and water level control system being connected with the soil column system. The embodiment of the utility model 10 provides a novel aeration zone leaching experimental device which can simulate the leaching process of pollutants in an aeration zone under natural conditions and is used for evaluating the pollution risk of the pollutants to the aeration zone and providing an effective reference for pollution prevention and control of the aeration zone.

Description

NOVEL AERATION ZONE LEACHING EXPERIMENTAL DEVICE

TECHNICAL FIELD

[01] The invention relates to the technical field of soil tests, and in particular to a novel aeration zone leaching experimental device.

BACKGROUND ART

[02] With the rapid development of the economy, the demand for water resources is increasing day by day, coupled with the increase of industrial pollution and agricultural fertilizers and pesticides usage amount, the pollution of water resources is increasing day by day, water resources have gradually become a factor restricting the development of China and the improvement of living standard. The pollutants in the surface water cause groundwater pollution due to the leaching action of the soil, so the study on the migration and transformation law of the pollutants in the unsaturated zone can effectively provide the basis for the risk assessment and restoration of the polluted soil and the reduction of groundwater pollution. A constant water head water supply device is needed for carrying out the aeration zone leaching experiment, the traditional Mariotte bottle is not sensitive, and in practical application, it is found that the pressure in the bottle needs to be reduced to a certain level before it starts to inhale air, causing fluctuations in the water level and possibly causing excessive water replenishment in the later stage.

SUMMARY

[03] The embodiment of the utility model provides a novel aeration zone leaching experimental device to overcome the defects of the prior art.

[04] In order to achieve the above object, the utility model adopts the following technical scheme.

[05] A novel aeration zone leaching experimental device comprises:

[06] a water supply and water level control system, used for providing a constant water head and counting the flow of water entering and exiting the device; and,

[07] a soil column system, used for bearing and containing a device for simulating the soil body of the aeration zone under the natural environment, and water intake of different layers can be realized,

[08] the water supply and water level control system being connected with the soil column system.

[09] Preferably, the water supply and water level control system comprises: a

Mariotte bottle and a balance bottle;

[10] an upper end of the Mariotte bottle is connected with an air inlet pipe and an air closing valve, a lower end of the Mariotte bottle is connected with a water feeding pipe, and a side surface of the Mariotte bottle is connected with a first guide pipe used for being connected with a balance bottle;

[11] a drain pipe and a second guide pipe connected with the soil column system are arranged at the bottom of the balance bottle;

[12] a height of the bottom of the air inlet pipe is higher than the height of an upper surface of the soil column in the soil column system.

[13] Preferably, valves are provided at the air inlet pipe, the water feeding pipe, the drain pipe, the first guide pipe, and the second guide pipe.

[14] Preferably, the soil column system comprises: a test tube used for bearing and containing soil body samples, and water outlets being arranged at different heights of the test tube.

[15] Preferably, the exterior of the test tube is wrapped with a black opaque curtain and the soil sample inside the test tube incorporates a bacterial inhibitor.

[16] According to the technical scheme provided by the embodiment of the utility model, the novel aeration zone leaching experimental device provided by the embodiment of the utility model can simulate the leaching process of pollutants in an aeration zone under natural conditions, is used for evaluating the pollution risk of the pollutants to the aeration zone, and provides an effective reference for pollution prevention and control of the aeration zone. The utility model has simple structure,

convenient operation, and effectively saves manpower and material resources, the water supply of the system is more uniform by adding the balance bottle connected with the

Mariotte bottle, the layered water intake can be realized by arranging the water outlets at different heights of the test tube, the flow of water entering and exiting the device can be counted, the experiment precision is improved, the error is reduced, and meanwhile, that the test tube is wrapped with a black opaque curtain and the soil sample inside the test tube incorporates a bacterial inhibitor greatly avoid the interference of sunlight and microbial growth on the experimental results.

[17] Additional aspects and advantages of the utility model will be set forth in part in the description which follows and will become obvious from the description, or may be learned by practice of the utility model.

BRIEF DESCRIPTION OF THE DRAWINGS

[18] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings used in the description of the embodiments will be briefly described below. Obviously, the drawings in the description below are only some embodiments of the utility model, and for a person skilled in the art, other drawings can be obtained according to these drawings without involving any inventive effort.

[19] FIG. 1 is a schematic diagram showing the structure of a novel aeration zone leaching experimental device provided by the embodiment of the utility model.

[20] Reference numerals:

[21] 1. water supply and water level control system; 2. soil column system; 3.

Mariotte bottle; 4. balance bottle;

[22] 5. air inlet pipe; 6. air closing valve; 7. water feeding pipe; 8. first guide pipe; 9. drain pipe; 10. second guide pipe; 11. test tube; 12. water outlet; 13. quartz sand; 14. soil sample; 15. valve A.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[23] The embodiments of the utility model will be described in detail below,

examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the utility model and are not to be construed as limiting the utility model.

[24] Those skilled in the art will appreciate that, as used herein, the singular forms “a”, “an”, “said” and “the” may include the plural forms as well, unless expressly stated otherwise. It should be further understood that the term “comprise” when used in this specification is taken to specify the presence of stated features, integers, steps, operations, elements, and/or assemblies, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, assemblies, and/or groups thereof. It will be understood that when an element is referred to as being “connected” or “coupled” to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Furthermore, “connected” or “coupled” as used herein may include wirelessly connected or coupled.

As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items.

[25] In the description of the utility model, it should be noted that the directional or positional relationships indicated by the terms “center”, “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inner”, “outer”, and the like are based on the directional or positional relationships shown in the drawings, only for the convenience of describing the utility model and simplifying the description, but do not indicate or imply that the referenced device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms “first”, “second”, and “third” are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

[26] Inthe description of the utility model, it is to be noted that the terms “mounted”, “linked” and “connected” are to be construed in a broad sense unless explicitly stated and defined otherwise, e.g. may be fixedly connected, or detachably connected, or integrally connected; may be mechanically connected, or electrically connected; may be connected directly or indirectly through an intermediary, and may be interconnected between two elements. For those skilled in the art, specific meanings of the above terms in the utility model can be specifically understood.

[27] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. It should also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless so defined.

[28] In order to facilitate the understanding of the embodiments of the utility model, several specific embodiments will be further explained with reference to the accompanying drawings, and each embodiment is not to be construed as limiting the embodiments of the utility model.

[29] The embodiment of the utility model provides a novel aeration zone leaching experimental device, as shown in FIG. 1, which comprises:

[30] a water supply and water level control system 1 and a soil column system 2, the water supply and water level control system 1 being positioned above the soil column system 2, the water supply and water level control system 1 being used for providing a constant water head and counting the flow of water entering and exiting the device, the soil column system 2 being used for bearing and containing a device for simulating the soil body of the aeration zone under the natural environment, and water intake of different layers can be realized. [BI] The water supply and water level control system 1 comprises: a Mariotte bottle 3 and a balance bottle 4. An upper end of the Mariotte bottle 3 is connected with an air inlet pipe 5 and an air closing valve 6, a lower end of the Mariotte bottle 3 is connected with a water feeding pipe 7, and a side surface of the Mariotte bottle 3 is connected with a first guide pipe 8; a drain pipe 9 and a second guide pipe 10 are arranged at the bottom of the balance bottle 4, the Mariotte bottle 3 is connected with the balance bottle 4 through a first guide pipe 8, wherein, valves are provided at the air inlet pipe 5, the water feeding pipe 7, the drain pipe 9, the first guide pipe 8 and the second guide pipe 19.

When the Mariotte bottle 3 needs to be replenished with water, the valve of the water feeding pipe 7 and the air closing valve 6 are opened, and the valve A15 is closed; when water is supplied to the soil system 2, the valve of the water feeding pipe 7 and the air closing valve 6 are closed, and the valve A15 is opened. The soil column system 2 comprises: a test tube 11 used for bearing and containing soil body samples, and connected with the balance bottle 4 through the second guide pipe 10. A plurality of water outlets 12 are arranged at different heights of the test tube 11 (only one is shown in FIG. 1), and the layered water intake can be realized, and the height of the bottom of the air inlet pipe 5 in the Mariotte bottle 3 must be higher than the height of the upper surface of the soil column in the test tube 11; the exterior of the test tube is wrapped with a black opaque curtain, so that decomposition of a sample caused by sunlight irradiation is avoided, and the soil sample inside the test tube incorporates a bacterial inhibitor to inhibit growth of microorganisms. Under the premise that the diameter of the Mariotte bottle is known, the inlet water flow is equal to the cross-sectional area of the Mariotte bottle multiplied by the water head difference in the Mariotte bottle within the experimental period, and the outlet water flow can be obtained by using the volume of the water sample in the sampling container within the experimental period.

[32] The aeration zone leaching experiment using the device of the utility model comprises the following specific steps of:

[33] the soil sample 14 is collected according to the requirements of the simulation experiment, and the content and distribution of pollutants in the soil sample are determined. The test tube 11 is sequentially filled with quartz sand 13, soil sample 14 and quartz sand 13 from bottom to top, and incorporates a bacterial inhibitor. The test tube 11 is connected with the balance bottle 4 through a second guide pipe 10, and a valve between the test tube 11 and the balance bottle 4 is opened, so that the water levels of the test tube 11, the balance bottle 4 and the Mariotte bottle 3 are the same. In the experimental stage, the water level of the balance bottle 4 is reduced due to the reduction of the water level in the test tube 11, and the Mariotte bottle 3 supplies water to the balance bottle 4 in time, so that the water levels of the test tube 11, the balance bottle 4 and the Mariotte bottle 3 continue to be the same. A sampler is used for collecting samples at water outlets 12 of different layers of the test tube 11, measuring the content of pollutants in the samples, and calculating the volume of the samples.

[34] Those of ordinary skill in the art will appreciate that: the drawings are only schematic illustrations of one embodiment, and the modules or processes in the drawings are not necessarily required to practice the utility model.

[35] Those of ordinary skill in the art will appreciate that: the components of the device of the embodiment may be distributed in the device of the embodiment as described in the embodiment or may be varied accordingly in one or more devices different from the embodiment. The components of the embodiments described above may be combined into one component or may be further divided into a plurality of sub- components.

[36] The above description is merely a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any changes or substitutions which may be readily conceivable by those skilled in the art within the technical scope disclosed in the utility model are intended to be within the scope of protection of the utility model. Therefore, the scope of protection of the utility model should be determined by the scope of protection of the claims.

Claims (5)

Conclusions A novel aeration zone leaching experimental apparatus, characterized by comprising the following: a water supply and a water level control system, which is used to provide a constant water head and count the flow of water entering and exiting the apparatus; and, a soil column system, which is used to support and contain a device for simulating the soil body of the aeration zone under the natural environment and water intake of different layers can be realized; wherein the water supply and water level control system is connected to the bottom column system. The device according to claim 1, characterized in that the water supply and water level control system comprises: a Mariotte bottle and a balance bottle; wherein an upper end of the Mariotte bottle is connected to an air inlet pipe and an air cut-off valve, a lower end of the Mariotte bottle is connected to a water supply pipe, and a side surface of the Mariotte bottle is connected to a guide pipe used for being connected to a balance bottle; wherein a discharge pipe and a second guide pipe connected to the bottom column system are arranged on the bottom of the balance bottle; wherein a height of the bottom of the air inlet pipe is higher than the height of an upper surface of the bottom column in the bottom column system. The device according to claim 2, characterized in that valves are provided on the air inlet pipe, the water supply pipe, the drain pipe, the first guide pipe and the second guide pipe. An apparatus according to claim 1, characterized in that the soil column system comprises: a test tube used for carrying and containing the soil body samples and wherein water outlets are arranged at different heights of the test tube. An apparatus according to claim 4, characterized in that the outer space of the test tube is wrapped with a black opaque curtain and the soil sample within the test tube contains a bacterial inhibitor.