A device for verifying the effect of saline-alkali land improvement blocking agent

Abstract

The utility model relates to a device for verifying the effect of a saline-alkali land improvement blocking agent, comprising a water storage tank, a salt-returning device and a heat source located above the salt-returning device, the salt-returning device comprising a salt-returning box placed in the water storage tank, the salt-returning box being provided with filter paper, a saline soil layer, a blocking layer and a planting soil layer in sequence from bottom to top, a plurality of water-permeable holes being opened on the bottom surface of the salt-returning box, the salt-returning device of the utility model is placed in the water storage tank, with the bottom suspended in the air, keeping the water surface parallel to the saline soil layer so as to form water absorption by the salt-returning device, the water absorption by the salt-returning device is used to moisten the saline soil layer and increase the water content of the saline soil layer, the water-permeable holes are used for water permeation, so that the water in the water storage tank passes through the filter paper and enters the saline soil layer, compared with the original method for verifying the effect of the saline-alkali land blocking agent which fails to simulate water transport and transpiration, the utility model has the characteristics of smooth water exchange and promotion of soil transpiration, and the utility model combines the principle that salt follows water to form a supporting device for quickly verifying the effect of the blocking agent.

Description

Technical Field

[0001] The utility model relates to the technical field of screening saline-alkali land improvement blocking agents, in particular to a device used for verifying the effect of saline-alkali land improvement blocking agents. Background Art

[0002] Saline-alkali soil is widely distributed around the world. According to statistics, there are about 955 million hm2 of saline-alkali soil in the world. 2 , with the rapid development of the global economy, the irrational development and utilization of land resources by humans has led to the deterioration of soil structure and ecological environment, and accelerated the process of soil salinization. my country's saline-alkali land improvement work started late, and generally went through three processes: biological improvement, biological and engineering improvement, and comprehensive improvement. The main technologies used in my country's saline-alkali land improvement are water conservancy improvement technology, physical and agricultural improvement technology, chemical and biological improvement technology, etc. Among them, effective physical blocking in physical improvement technology is extremely critical. In the soil, capillary water is the most effective soil moisture and an important indicator for measuring field water holding capacity. In arid environments, the salt in the soil rises to the surface with capillary water, and the salt accumulates on the surface after evaporation. The principle of physical blocking is to cut off the capillary water rising path. "Xinjiang Agricultural Science and Technology" 2021 Issue 5 A brief analysis of saline-alkali land management technology mentioned that my country has currently applied physical blocking improvement measures, and now lays coarse sand layers, bark chips, wood chips or furnace ash slag to form a salt barrier. Chinese invention patent CN 113141802A provides a device for simulating water and salt migration in saline-alkali soil and a method for inhibiting salt in saline-alkali land, including a soil column main body circular tube equipped with a connecting pipe and a liquid receiving pool, filling and laying a saline-alkali soil layer, filling and laying a salt isolation layer, and filling and laying a high-quality soil layer in the soil column device, and verifying the blocking effect by simulating the water and salt migration of saline-alkali soil, but the bottom permeability of the device is not sufficient, and transpiration is not considered. Chinese utility model patent CN 205320501 U provides a soil layer structure for improving saline-alkali land and backfilling land using fly ash and desulfurized gypsum, which includes a hydrophobic layer, a blocking layer and an original soil layer from top to bottom, but it mainly uses inert materials to construct the soil layer structure, and cannot quickly screen the inert materials of the blocking agent for saline-alkali land improvement.

[0003] Nowadays, there are many kinds of physical blocking inert materials, but there is a lack of a quick and simple device that can simulate water transport and environment to screen and verify the effects of inert blocking materials, so as to accelerate the process of saline-alkali land improvement. Utility Model Content

[0004] The utility model aims at the deficiencies of the prior art and provides a device for verifying the effect of a blocking agent for improving saline-alkali land.

[0005] The utility model is realized through the following technical scheme, and provides a device for verifying the effect of a blocking agent for improving saline-alkali land, comprising a water storage tank, a salt return device and a heat source located above the salt return device, wherein the salt return device comprises a salt return box placed in the water storage tank, wherein filter paper, a salt soil layer, a blocking layer and a planting soil layer are sequentially arranged in the salt return box from bottom to top, and a plurality of water permeable holes are opened on the bottom surface of the salt return box.

[0006] The salt-returning device in this scheme is placed in a water storage tank with its bottom suspended in the air, keeping the water surface parallel to the saline soil layer to form water absorption by the salt-returning device. The water absorption by the salt-returning device is used to moisten the saline soil layer and increase the water content of the saline soil layer. The water-permeable holes are used to permeate water, so that the water in the water storage tank passes through the filter paper and enters the saline soil layer. After the salt-returning device completes water absorption, it is placed under a heat source to form a blocking agent effect verification stage.

[0007] As an optimization, the salt return box is supported in the water tank by a base, the base includes an outer frame surrounding the outer periphery of the salt return box and a plurality of fixed sleeves fixedly connected to the bottom of the outer frame, the lower end of the outer frame extends inward with a support flange supported under the salt return box, the lower end of the fixed sleeve is threadedly connected with an anchor screw, and the lower end of the anchor screw is fixedly connected with a foot. The anchor screw in this solution can adjust the height of the base after rotating, thereby adjusting the height of the salt return box under water.

[0008] As an optimization, a vertical fixing rod is fixedly connected to the side of the water storage tank, an adjusting screw is threadedly connected to the upper end of the fixing rod, a transverse connecting rod is fixedly connected to the upper end of the adjusting screw, and the heat source is fixedly connected to the transverse connecting rod. The adjusting screw in this solution is threadedly connected to the fixing rod, and the height of the heat source can be adjusted by rotating the adjusting screw. At the same time, the heat source can be rotated and swung to the rear by rotating the adjusting screw, so as to facilitate the taking and placing operation of the salt return device.

[0009] As an optimization, the water storage tank and the salt return box are both rectangular boxes with upper openings, which are convenient for processing with acrylic plates.

[0010] As an optimization, the heat source is a long strip of heat-generating light source, which can simulate the transpiration effect caused by sunlight.

[0011] As an optimization, the thicknesses of the saline soil layer, blocking layer and planting soil layer are 10 cm, 2 cm and 15 cm respectively.

[0012] As an optimization, the filter paper is provided with at least two layers. The filter paper is used to absorb moisture from the lower part and receive the upper part to prevent leakage, so the two layers can prevent the filter paper from being damaged and causing verification failure.

[0013] The beneficial effects of the utility model are as follows: the utility model is a device for verifying the effect of saline-alkali land improvement blocking agents. Compared with the original verification of the effect of saline-alkali land blocking agents which fails to simulate water transport and transpiration, the utility model has the characteristics of smooth water exchange and promotion of soil transpiration. The utility model combines the principle that salt follows water to form a supporting device for quickly verifying the effect of blocking agents. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the utility model from another angle;

[0016] Figure 3 This is an explosion diagram of the utility model;

[0017] Figure 4 This is a front view of the salt return device of the utility model;

[0018] Figure 5 This is a schematic diagram of the base structure of the utility model;

[0019] As shown in the figure:

[0020] 1. Salt return box, 2. Planting soil layer, 3. Blocking layer, 4. Salt soil layer, 5. Filter paper, 6. Water storage tank, 7. Heat source, 8. Mounting seat, 9. Fixing rod, 10. Adjusting screw, 11. Horizontal connecting rod, 12. Water permeable hole, 13. Outer frame, 14. Support flange, 15. Fixing sleeve, 16. Anchor screw, 17. Anchor. DETAILED DESCRIPTION

[0021] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0022] like Figures 1 to 5 As shown, the utility model is a device for verifying the effect of a saline-alkali land improvement blocking agent, comprising a water storage tank 6, a salt return device and a heat source 7 located above the salt return device. The water storage tank 6 is a rectangular box with an upper opening, made of transparent acrylic material, and filled with clean water with a water storage capacity of more than 10 cm.

[0023] The salt return device includes a salt return box 1 placed in a water storage tank 6. The salt return box 1 is a rectangular box with an upper opening and is made of transparent acrylic material. A plurality of water holes 12 are opened on the bottom of the salt return box 1. The water holes 12 are densely arranged at the bottom of the salt return box 1, and the spacing between the water holes 12 is 5 mm.

[0024] The salt return box 1 is provided with filter paper 5, salt soil layer 4, blocking layer 3 and planting soil layer 2 from bottom to top, and the thickness of the salt soil layer 4, blocking layer 3 and planting soil layer 2 are 10 cm, 2 cm and 15 cm respectively. The filter paper 5 is provided with at least two layers, and the filter paper in this embodiment is provided with two layers.

[0025] The heat source 7 is a long strip of heat source, which can be a heating tungsten wire. In order to achieve the fixation and height adjustment of the heat source 7, a vertical fixing rod 9 is fixed to the side of the water tank 6. The fixing rod 9 is a metal rod with a mounting seat 8 welded to the lower end. The mounting seat 8 is fixed to the outer side of the middle of the long side of the water tank 6 by bolts.

[0026] The upper end of the fixing rod 9 is threadedly connected with a vertical adjusting screw 10, and the upper end of the adjusting screw 10 is fixedly connected with a horizontal connecting rod 11. The heat source 7 is fixedly connected to the horizontal connecting rod 11, so that the heat source 7 extends to the top of the salt return box 1. The heat source 7 can be swung backward by rotating the adjusting screw 10, so as to avoid the top of the salt return box, which is convenient for operating the salt return box, and the height of the heat source can be adjusted by continuous rotation.

[0027] The salt return box 1 is supported in the water storage tank 6 by a base, and the base includes an outer frame 13 surrounding the outer periphery of the salt return box 1 and a plurality of fixed sleeves 15 fixedly connected to the bottom of the outer frame 13. The lower end of the outer frame 13 extends inwardly to have a supporting flange 14 supported under the salt return box 1. In this embodiment, the outer frame 13 is welded from four angle steels, one side of the angle steel forms the outer frame 13, and the other side forms the supporting flange 14.

[0028] The lower end of the fixing sleeve 15 is threadedly connected with a foundation screw 16, and the lower end of the foundation screw 16 is fixedly connected with a foundation 17. This facilitates the leveling and height adjustment of the base.

[0029] The use of the utility model:

[0030] When in use, two layers of filter paper 5 are laid flat on the bottom of the salt return box 1, and the filter paper is used to absorb moisture from the lower part and connect the upper part to prevent leakage; 10 cm of saline soil is added above the filter paper to form a saline soil layer 4, and the saline soil layer can be made of natural saline-alkali soil or a mixture of salt and normal soil; 2 cm of blocking agent is laid flat on the saline soil layer, and the blocking agent is an inert blocking material to form a blocking layer 3, which is used to block the connection between the lower saline soil and the upper part; 15 cm of normal planting soil is filled above the blocking layer 3 to form a planting soil layer 2, and the normal planting soil layer is used to absorb the blocking effect of the feedback blocking layer; the salt return box 1 is supported in a water storage tank 6 by a base, and the bottom is suspended to keep the water surface parallel to the formation of the saline soil layer Figure 4The salt return device absorbs water, and the water absorbed by the salt return device is used to moisten the saline soil layer and increase the water content of the saline soil layer; after the salt return device completes the water absorption, it evaporates in cooperation with the light source and the base.

[0031] Embodiment 1:

[0032] A device for verifying the effect of a saline-alkali land improvement blocking agent, the specific steps are as follows:

[0033] (1) Figure 4 Two layers of thick filter paper are laid flat on the bottom of the salt return box 1, and the filter paper is used to absorb moisture from the lower part and receive the upper part to prevent leakage;

[0034] (2) adding 10 cm of saline soil above the filter paper to form a saline soil layer 4, wherein the saline soil layer is natural saline-alkali soil in Moyu County, Xinjiang, with a total soluble salt content of 30‰ and a pH of 8.2;

[0035] (3) Spreading a 2 cm thick blocking agent on the saline soil layer, wherein the blocking agent is an inert blocking material to form a blocking layer 3 for blocking the connection between the lower saline soil and the upper part, wherein the inert blocking material is slag, fly ash, zeolite, or a mixture of fly ash and zeolite in a ratio of 1:1;

[0036] (4) Filling 15 cm of normal planting soil above the blocking layer to form a planting soil layer 2, wherein the normal planting soil layer is used to absorb the blocking effect of the feedback blocking layer, and the normal planting soil is the planting soil of Ningyang County, Tai'an City, Shandong Province, with a total soluble salt content of 1.8‰ and a pH of 6.8;

[0037] (5) The salt return device is placed in a water tank with the bottom suspended in the air to keep the water surface parallel to the salt soil layer. Figure 4 The salt return device absorbs water, and the salt return device absorbs water to moisten the saline soil layer and increase the water content of the saline soil layer;

[0038] (6) After the salt return device has completed water absorption, it cooperates with the heating light source to form a blocking agent effect verification stage;

[0039] (7) The above-mentioned mixture of fly ash and zeolite in a ratio of 1:1 is referred to as fly ash + zeolite;

[0040] (8) The same steps were performed without adding inert blocking materials as a control;

[0041] (9) As can be seen from Table 1, different inert blocking materials have different blocking effects on salt. The fly ash has the best effect, as can be seen from the increase in salt content. After 7 days, the salt content of normal planting soil increased by only 0.30‰ compared with that on day 0. After 14 days and 21 days, the salt content of normal planting soil increased by 0.18‰ compared with that on day 0. The blocking effects of other materials are fly ash + zeolite > zeolite > slag. Although the blocking effects of various materials are not the same, they are all better than the control group without adding inert blocking materials. Among them, the inert blocking material fly ash + zeolite, the salt content of normal planting soil increased by 0.50‰, 0.21‰ and 0.19‰ after 7d, 14d and 21d compared with the salt content on 0d; the inert blocking material zeolite, the salt content of normal planting soil increased by 0.52‰, 0.37‰ and 0.37‰ after 7d, 14d and 21d compared with the salt content on 0d; the inert blocking material slag, the salt content of normal planting soil increased by 3.17‰, 1.08‰ and 1.00‰ after 7d, 14d and 21d compared with the salt content on 0d; the salt content of normal planting soil in the control group increased by 8.45‰, 4.80‰ and 4.75‰ after 7d, 14d and 21d compared with the salt content on 0d. The utility model can quickly screen the optimal inert blocking material within 7-14 days.

[0042] Table 1 Salt dynamic detection table

[0043]

[0044] Embodiment 2:

[0045] A device for verifying the effect of a saline-alkali land improvement blocking agent, the specific steps are as follows:

[0046] (1) Figure 4 Two layers of thick filter paper are laid flat on the bottom of the salt return box 1, and the filter paper is used to absorb moisture from the lower part and receive the upper part to prevent leakage;

[0047] (2) adding 10 cm of saline soil above the filter paper to form a saline soil layer 4, wherein the saline soil layer is normal planting soil mixed with 3% sodium chloride;

[0048] (3) Spreading a 2 cm thick blocking agent on the saline soil layer, wherein the blocking agent is an inert blocking material to form a blocking layer 3 for blocking the connection between the lower saline soil and the upper part, wherein the inert blocking material is slag, fly ash, zeolite, or a mixture of fly ash and zeolite in a ratio of 1:1;

[0049] (4) Filling 15 cm of normal planting soil above the blocking layer to form a planting soil layer 2, wherein the normal planting soil layer is used to absorb the blocking effect of the feedback blocking layer, and the normal planting soil is the planting soil of Ningyang County, Tai'an City, Shandong Province, with a total soluble salt content of 1.8‰ and a pH of 6.8;

[0050] (5) The salt return device is placed in a water tank with the bottom suspended in the air to keep the water surface parallel to the salt soil layer. Figure 4 The salt return device absorbs water, and the salt return device absorbs water to moisten the saline soil layer and increase the water content of the saline soil layer;

[0051] (6) After the salt return device has completed water absorption, it cooperates with the heating light source to form a blocking agent effect verification stage;

[0052] (7) The above-mentioned mixture of fly ash and zeolite in a ratio of 1:1 is referred to as fly ash + zeolite;

[0053] (8) The same steps were performed without adding inert blocking materials as a control;

[0054] (9) It can be seen from Table 2 that different inert blocking materials have different blocking effects on salt. The increase in salt content shows that fly ash has the best effect. After 7 days, the salt content of normal planting soil increased by only 0.28‰ compared with 0 days. After 14 days and 21 days, the salt content of normal planting soil increased by 0.20‰ compared with 0 days. The blocking effects of other materials are fly ash + zeolite > zeolite > slag. Although the blocking effects of various materials are not the same, they are all better than the control group without adding inert blocking materials. Among them, the inert blocking material fly ash + zeolite, the salt content of normal planting soil increased by 0.37‰, 0.25‰ and 0.25‰ after 7d, 14d and 21d respectively compared with the salt content on 0d; the inert blocking material zeolite, the salt content of normal planting soil increased by 0.41‰, 0.38‰ and 0.35‰ after 7d, 14d and 21d respectively compared with the salt content on 0d; the inert blocking material slag, the salt content of normal planting soil increased by 3.01‰, 1.20‰ and 0.90‰ after 7d, 14d and 21d respectively compared with the salt content on 0d; the salt content of normal planting soil in the control group increased by 6.88‰, 4.53‰ and 4.25‰ after 7d, 14d and 21d respectively compared with the salt content on 0d. The utility model can quickly screen the optimal inert blocking material within 7-14 days.

[0055] Table 2 Dynamic detection table of salt content

[0056]

[0057] Embodiment 3:

[0058] A device for verifying the effect of a saline-alkali land improvement blocking agent, the specific steps are as follows:

[0059] (1) Figure 4 Two layers of thick filter paper are laid flat on the bottom of the salt return box 1, and the filter paper is used to absorb moisture from the lower part and receive the upper part to prevent leakage;

[0060] (2) adding 10 cm of saline soil above the filter paper to form a saline soil layer 4, wherein the saline soil layer is natural saline-alkali soil in Moyu County, Xinjiang, with a total soluble salt content of 30‰ and a pH of 8.2;

[0061] (3) A 15 cm normal planting soil blocking agent mixed layer is laid on the saline soil layer, the mixed layer is composed of normal planting soil and an inert blocking material added in an amount of 10%, the normal planting soil is the planting soil of Ningyang County, Tai'an City, Shandong Province, the total amount of soluble salt is 1.8‰, the pH is 6.8, and the inert blocking material is slag, fly ash, zeolite, and a mixture of fly ash and zeolite in a ratio of 1:1;

[0062] (4) The salt return device is placed in a water tank with the bottom suspended in the air to keep the water surface parallel to the salt soil layer. Figure 4 The salt return device absorbs water, and the salt return device absorbs water to moisten the saline soil layer and increase the water content of the saline soil layer;

[0063] (5) After the salt return device has completed water absorption, it cooperates with the heating light source to form a blocking agent effect verification stage;

[0064] (6) The above-mentioned mixture of fly ash and zeolite in a ratio of 1:1 is referred to as fly ash + zeolite;

[0065] (7) The same steps were performed without adding inert blocking materials as a control;

[0066] (8) It can be seen from Table 3 that different inert blocking materials mixed with soil increase the salt content of the planting soil in Ningyang County, Tai'an City to a certain extent, which is reflected in the increase of soil salt on day 0. Different inert blocking materials have different blocking effects on salt. It can be seen from the increase in salt that fly ash has the best effect. After 7 days, the salt content of normal planting soil increased by only 0.40‰ compared with 0 days. After 14 days and 21 days, the salt content of normal planting soil increased by 0.38‰ and 0.37‰ respectively compared with 0 days. The blocking effects of other materials are fly ash + zeolite > zeolite > slag. Although the blocking effects of various materials are not the same, they are all better than the control group without adding inert blocking materials. Among them, the inert blocking material fly ash + zeolite, the salt content of normal planting soil increased by 0.67‰, 0.63‰ and 0.60‰ respectively after 7d, 14d and 21d compared with the salt content on 0d; the inert blocking material zeolite, the salt content of normal planting soil increased by 0.75‰, 0.71‰ and 0.65‰ respectively after 7d, 14d and 21d compared with the salt content on 0d; the inert blocking material slag, the salt content of normal planting soil increased by 2.16‰, 1.80‰ and 1.64‰ respectively after 7d, 14d and 21d compared with the salt content on 0d; the salt content of normal planting soil in the control group increased by 8.53‰, 4.80‰ and 4.70‰ respectively after 7d, 14d and 21d compared with the salt content on 0d. The utility model can quickly screen the optimal inert blocking material within 7-14 days.

[0067] Table 3 Salt dynamic detection table

[0068]

[0069] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A device for verifying the effect of a saline-alkali land improvement blocking agent, characterized in that: The invention comprises a water storage tank (6), a salt return device and a heat source (7) located above the salt return device. The salt return device comprises a salt return box (1) placed in the water storage tank (6). The salt return box (1) is provided with filter paper (5), a salt soil layer (4), a blocking layer (3) and a planting soil layer (2) in order from bottom to top. The bottom surface of the salt return box (1) is provided with a plurality of water permeable holes (12).

2. A device for verifying the effect of a saline-alkali land improvement blocking agent according to claim 1, characterized in that: The salt return box (1) is supported in a water storage tank (6) via a base, the base comprising an outer frame (13) surrounding the outer periphery of the salt return box (1) and a plurality of fixed sleeves (15) fixedly connected to the bottom of the outer frame (13), a support flange (14) extending inwardly from the lower end of the outer frame (13) and supported below the salt return box (1), a ground screw (16) being threadedly connected to the lower end of the fixed sleeve (15), and a ground screw (17) being fixedly connected to the lower end of the ground screw (16).

3. The device for verifying the effect of a saline-alkali land improvement blocking agent according to claim 1, characterized in that: A vertical fixing rod (9) is fixedly connected to the side of the water storage tank (6); an adjusting screw (10) is threadedly connected to the upper end of the fixing rod (9); a transverse connecting rod (11) is fixedly connected to the upper end of the adjusting screw (10); and the heat source (7) is fixedly connected to the transverse connecting rod (11).

4. The device for verifying the effect of a saline-alkali land improvement blocking agent according to claim 1, characterized in that: The water storage tank (6) and the salt return box (1) are both rectangular boxes with an upper opening.

5. The device for verifying the effect of a saline-alkali land improvement blocking agent according to claim 1, characterized in that: The heat source (7) is a long strip-shaped heat-generating light source.

6. The device for verifying the effect of a blocking agent for improving saline-alkali land according to claim 1, characterized in that: The thicknesses of the saline soil layer (4), the blocking layer (3) and the planting soil layer (2) are 10 cm, 2 cm and 15 cm respectively.

7. The device for verifying the effect of a saline-alkali land improvement blocking agent according to claim 1, characterized in that: The filter paper (5) is provided with at least two layers.

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