Sludge solidified soil acid rain erosion simulation experiment device

Abstract

The invention provides a sludge solidified soil acid rain erosion simulation experiment device, and belongs to the technical field of soil improvement, the sludge solidified soil acid rain erosion simulation experiment device comprises an experiment unit; the experiment unit comprises a sample space used for placing a solidified soil sample, a sample sensor arranged in the sample space and used for monitoring sample parameters, an acid liquor bin used for placing acid liquor, and a spraying device used for extracting the acid liquor from the acid liquor bin and spraying the acid liquor to the outer surface of the solidified soil sample; the sludge solidified soil acid rain erosion simulation experiment device is used for carrying out a contrast test on solidified soil under erosion of acid rain with different acidity values, acid liquor with a specific pH value is manually blended to simulate acid rain, and the acid liquor is sprayed to the surface of a solidified soil sample to simulate the erosion effect of the acid rain on the sludge solidified soil; the sample sensor arranged in the solidified soil sample can collect sample parameter information so as to analyze erosion parameters of the acid liquor to the solidified soil sample.

Description

Technical Field

[0001] The invention belongs to the technical field of soil improvement, and more specifically relates to a silt solidified soil acid rain erosion simulation experimental device. Background Art

[0002] Silt-stabilized soil is a type of soil that uses silt and other materials and is processed through a specific process to give it a certain strength and stability. This material is mainly used in the fields of soil improvement, environmental remediation, and waste disposal. The main functions of silt-stabilized soil include: Silt-stabilized soil can be used to effectively treat and utilize silt and reduce its pollution to the environment. Silt-stabilized soil has a certain strength and stability and can be used for soil improvement to increase the bearing capacity and stability of the soil. Silt-stabilized soil can also be used for environmental remediation, such as the restoration of landfills and abandoned mines.

[0003] According to the existing technology, the roadbed of some roads uses silt-solidified soil as the main material. However, the rainfall in some areas is acidic, and acid rain may have some impact on the roadbed made of silt-solidified soil, mainly the erosion of silt-solidified soil by acid rain. The acidic substances in acid rain may erode the surface of silt-solidified soil roadbed, causing damage and falling off of the roadbed surface. Summary of the invention

[0004] Based on this, the object of the present invention is to provide a silt solidified soil acid rain erosion simulation experimental device, which is used to conduct comparative tests on solidified soil under acid rain erosion of different acidities; the silt solidified soil acid rain erosion simulation experimental device comprises an experimental unit; the experimental unit comprises a sample space for placing solidified soil samples, a sample sensor arranged in the sample space for monitoring sample parameters, an acid liquid tank for placing acid liquid, and a spraying device for extracting acid liquid from the acid liquid tank and spraying the acid liquid onto the outer surface of the solidified soil sample;

[0005] The acid liquid is a liquid adjusted to a specific pH value. The spraying device sprays the acid liquid onto the surface of the solidified soil sample. The acid liquid penetrates from the surface of the solidified soil sample into the interior of the solidified soil sample to simulate the erosion effect of acid rain on the solidified soil sample. The sample sensor is used to detect the erosion parameters of the acid liquid on the solidified soil sample inside the solidified soil sample.

[0006] Preferably, the sample space comprises a semi-enclosed space surrounded by three side baffles and a bottom plate, two opposite side baffles of the three side baffles are symmetrical trapezoids, and the other side baffle and the bottom plate are rectangular; the solidified soil sample is a trapezoidal body with four side surfaces, three of the four side surfaces are perpendicular to the bottom surface and are respectively in contact with the three side baffles of the sample space, and the other side surface is inclined to the bottom surface;

[0007] A sensor bracket is arranged on the bottom plate of the sample space, and a sample sensor is arranged on the end of the sensor bracket away from the bottom plate of the sample space; the sample sensor extends from the bottom of the solidified soil sample into the interior of the solidified soil sample through the sensor bracket.

[0008] Preferably, the spraying device comprises a top spray head and an inclined spray head; the top spray head is used to spray acid liquid onto the top surface of the solidified soil sample, and the inclined spray head is used to spray acid liquid onto the inclined side of the solidified soil sample.

[0009] Preferably, a plurality of sample sensors are arranged inside the sample space, and the position of each sample sensor is inconsistent with that of other sample sensors inside the sample space; the plurality of sample sensors in the sample space are used to detect parameters of different positions inside the solidified soil sample eroded by the acid.

[0010] Preferably, the experimental unit further comprises an acid liquid circulation channel, which is used to collect the acid liquid and transport the collected acid liquid to the acid liquid tank; the acid liquid circulation channel has the effect of recycling the acid liquid.

[0011] Preferably, the acid circulation channel includes a filter channel arranged at the bottom of the sample space, the filter channel includes a proximal end and a distal end, the acid flows into the filter channel through the proximal end, a first liquid pump is arranged at the distal end of the filter channel, the first liquid pump is used to transport the acid at the distal end of the filter channel to the acid tank; a first filter screen is arranged at the proximal end of the filter channel, the first filter screen is used to prevent large particles of impurities from entering the filter channel; a sedimentation tank is also arranged in the filter channel, a second filter screen is arranged in the sedimentation tank near the distal end of the filter channel, the sedimentation tank and the second filter screen are used to filter small particles of impurities;

[0012] A slope is arranged between the sedimentation tank and the far end of the filtering channel, and the slope is used to guide the acid liquid filtered by the sedimentation tank and the second filter screen to the far end of the filtering channel.

[0013] Preferably, the acid liquid tank comprises two spaces, a proximal acid liquid tank and a distal acid liquid tank, and a second liquid pump is arranged between the proximal acid liquid tank and the distal acid liquid tank; the spray device extracts acid from the proximal acid liquid tank, and the first liquid pump transports the acid at the distal end of the filtration channel to the distal acid liquid tank;

[0014] The proximal acid liquid tank is provided with a pH detection device, a pH adjustment device and a stirring device; the pH detection device is used to detect the pH value of the acid liquid in the proximal acid liquid tank; the pH adjustment device is used to inject acidic liquid and / or alkaline liquid into the proximal acid liquid tank to adjust the pH value of the acid liquid in the proximal acid liquid tank; the stirring device is used to stir the acid liquid in the proximal acid liquid tank;

[0015] Liquid level sensors are arranged in the proximal acid liquid tank and the distal acid liquid tank, and the liquid level sensors are used to detect the liquid levels of the acid liquid in the proximal acid liquid tank and the distal acid liquid tank.

[0016] Preferably, the experimental unit further comprises an air blowing device, which is used to blow air toward the surface of the solidified soil sample to simulate the weathering of the solidified soil sample by natural wind in a natural environment.

[0017] Preferably, the experimental unit further comprises a light source, and the light source is used to illuminate the surface of the solidified soil sample to simulate the influence of sunlight on the solidified soil sample in a natural environment.

[0018] Preferably, the silt solidified soil acid rain erosion simulation experimental device comprises a plurality of experimental units, and the acid liquid tank of each experimental unit is respectively filled with acid liquid with different pH values; the silt solidified soil acid rain erosion simulation experimental device can simultaneously test the erosion effect of acid rain with different pH values ​​on solidified soil.

[0019] According to an embodiment of the present invention, a silt-solidified soil acid rain erosion simulation experimental device is provided, which is used to conduct comparative tests on solidified soil under acid rain erosion of different acidities. Acid rain is simulated by manually mixing an acid liquid with a specific pH value, and then spraying the acid liquid onto the surface of the solidified soil sample to simulate the erosion effect of acid rain on the silt-solidified soil. A sample sensor arranged inside the solidified soil sample can collect sample parameter information to analyze the erosion parameters of the acid liquid on the solidified soil sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present disclosure includes drawings, which should be considered to be included in and constitute a part of the specification, and together with the specification, illustrate various exemplary embodiments, features and aspects of the present disclosure, and are used to explain the principles of the present disclosure. The present invention will be more fully understood through the following detailed description in conjunction with the drawings. Among them:

[0021] Figure 1 Schematic diagram of an experimental unit of a silt solidification soil acid rain erosion simulation experimental device according to an embodiment of the present invention;

[0022] Figure 2 Schematic diagram of a sample space of a silt solidification soil acid rain erosion simulation experimental device according to an embodiment of the present invention;

[0023] Figure 3 It is a schematic diagram of the internal structure of an experimental unit of a silt solidification soil acid rain erosion simulation experimental device according to an embodiment of the present invention;

[0024] Figure 4 yes Figure 3 A partial enlarged view of the middle A;

[0025] Figure 52 is a schematic diagram of a remote acid liquid tank of a silt solidification soil acid rain erosion simulation experimental device according to an embodiment of the present invention;

[0026] Figure 6 2 is a schematic diagram of a proximal acid liquid tank of a silt solidification soil acid rain erosion simulation experimental device according to an embodiment of the present invention;

[0027] Figure 7 Schematic diagram of an acid circulation channel of a silt solidification soil acid rain erosion simulation experimental device according to an embodiment of the present invention;

[0028] Figure 8 Schematic diagram of a silt solidification soil acid rain erosion simulation experimental device in use according to an embodiment of the present invention;

[0029] Wherein: experimental unit 10, sample space 11, sample sensor 12, acid delivery pipeline 13, sensor bracket 14, solidified soil sample 20, filtration channel 21, first liquid pump 22, first filter screen 23, sedimentation tank 24, second filter screen 25, diversion channel 26, proximal acid liquid tank 31, distal acid liquid tank 32, second liquid pump 33, pH detection device 41, pH adjustment device 42, stirring device 43, liquid level sensor 44, air blowing device 51, light source 52. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings, but the present invention is not limited to the following embodiments.

[0031] Silt-stabilized soil is a type of soil that uses silt and other materials and is processed through a specific process to give it a certain strength and stability. This material is mainly used in the fields of soil improvement, environmental remediation, and waste disposal. The main functions of silt-stabilized soil include: Silt-stabilized soil can be used to effectively treat and utilize silt and reduce its pollution to the environment. Silt-stabilized soil has a certain strength and stability and can be used for soil improvement to increase the bearing capacity and stability of the soil. Silt-stabilized soil can also be used for environmental remediation, such as the restoration of landfills and abandoned mines.

[0032] According to the existing technology, the roadbed of some roads uses silt-solidified soil as the main material. However, the rainfall in some areas is acidic, and acid rain may have some impact on the roadbed made of silt-solidified soil, mainly the erosion of silt-solidified soil by acid rain. The acidic substances in acid rain may erode the surface of silt-solidified soil roadbed, causing damage and falling off of the roadbed surface.

[0033] In order to solve the above problems, the purpose of the present invention is to provide a silt solidified soil acid rain erosion simulation experimental device, which is used to conduct comparative tests on solidified soil under acid rain erosion of different acidities; the silt solidified soil acid rain erosion simulation experimental device comprises an experimental unit 10; the experimental unit 10 comprises a sample space 11 for placing a solidified soil sample 20, a sample sensor 12 arranged in the sample space 11 for monitoring sample parameters, an acid liquid tank for placing acid liquid, and a spraying device for extracting acid liquid from the acid liquid tank and spraying the acid liquid onto the outer surface of the solidified soil sample 20;

[0034] The acid liquid is a liquid adjusted to a specific pH value. The spraying device sprays the acid liquid onto the surface of the solidified soil sample 20. The acid liquid penetrates from the surface of the solidified soil sample 20 into the interior of the solidified soil sample 20 to simulate the erosion effect of acid rain on the solidified soil sample 20. The sample sensor 12 is used to detect the erosion parameters of the acid liquid on the solidified soil sample 20 inside the solidified soil sample 20.

[0035] In this embodiment, the preparation process of silt solidified soil generally includes the following steps:

[0036] The sludge is pre-treated, including dehydration and drying, to make it suitable for solidification. This can be done by centrifugal dehydration, natural drying, etc.

[0037] Add a curing agent to the pretreated sludge. Common curing agents include cement, lime, fly ash, etc. The type and amount of curing agent added are determined according to the properties and requirements of the sludge.

[0038] Mix the sludge and curing agent thoroughly to ensure that the curing agent is evenly distributed in the sludge.

[0039] The mixed silt solidified soil undergoes a solidification reaction under the action of the solidifying agent to form solidified soil with certain strength and stability.

[0040] The solidified soil can be further post-processed, such as crushing, screening, etc., to meet the needs of different uses.

[0041] Using silt solidified soil as the roadbed also requires that the evenly mixed silt solidified soil be laid on the roadbed and compacted using equipment such as rollers to ensure the density and stability of the roadbed. The surface of the roadbed is leveled and trimmed to ensure that the surface of the roadbed is flat and uniform.

[0042] like Figure 1 , Figure 2As shown, a silt solidified soil acid rain erosion simulation experimental device of this embodiment is mainly used for comparative tests of solidified soil under acid rain erosion of different acidities. The specific process is mainly to make the silt solidified soil to be tested into a solidified soil sample 20 and place the solidified soil sample 20 into the sample space 11. The shape of the solidified soil sample 20 matches the sample space 11, and a sample sensor 12 is arranged in the sample space 11. The sample sensor 12 protrudes upward from the bottom of the sample space 11 to the inside of the sample space 11, and a blind hole for the sample sensor 12 to pass through is arranged at the bottom of the solidified soil sample 20.

[0043] In some embodiments, the solidified soil sample 20 can be directly solidified in the sample space 11 , which can ensure that the solidified soil sample 20 is closely fitted to the sample space 11 and that the sample sensor 12 is in full contact with the solidified soil sample 20 .

[0044] In some embodiments, the sample sensor 12 may be a humidity sensor for measuring the humidity of soil at a specific location of the solidified soil sample 20 , thereby determining the effect of acid rain on the solidified soil sample 20 .

[0045] The pH value is usually used to express the acidity and alkalinity of acid rain. The pH value is an indicator of the acidity and alkalinity of a solution. The smaller the value, the more acidic the solution is, and the larger the value, the more alkaline the solution is. A pH value of 7 means neutral. The pH value of acid rain is usually between 4.2 and 5.0, but it can be lower, even lower than 4.0. The pH range of acid rain is mainly affected by the formation of acidic substances such as sulfuric acid and nitric acid in the atmosphere by gases such as nitrogen oxides and sulfur dioxide in the atmosphere and water vapor. These acidic substances combine with water vapor to form acid rain during rainfall, resulting in a decrease in the pH value of the rainfall, making acid rain corrosive and harmful to the environment.

[0046] The experimental unit 10 includes a sample space 11, an acid tank and a spraying device. The pH value of the acid can be determined according to the pH value of acid rain in the area where the silt-solidified soil is used, or according to different test requirements. The acid is pre-adjusted to a specific pH value and placed in the acid tank, or it can be directly adjusted in the acid tank.

[0047] The spraying device includes a pump for extracting acid from the acid tank and a spray head for spraying the acid outward, and also includes an acid delivery pipeline 13 connected to the spray head.

[0048] In some embodiments, the acid liquid tank is disposed at the end of the sample space 11 in the length direction, one or more acid liquid delivery pipes 13 may be disposed in the width direction of the sample space 11 , and one or more spray heads may be disposed on each acid liquid delivery pipe 13 .

[0049] In the present embodiment, two acid delivery pipes 13 are arranged in the width direction of the sample space 11. The two acid delivery pipes 13 are connected to the outlet pipe of the pump for extracting acid from the acid tank through a three-way joint. The two acid delivery pipes 13 spray acid outward at the same time, so that the acid can be evenly sprayed onto the surface of the solidified soil sample 20.

[0050] Further, the sample space 11 includes a semi-enclosed space surrounded by three side baffles and a bottom plate, two opposite side baffles of the three side baffles are symmetrical trapezoidal, and the other side baffle and the bottom plate are rectangular; the solidified soil sample 20 is a trapezoidal body with four side surfaces, three of the four side surfaces are perpendicular to the bottom surface and are respectively in contact with the three side baffles of the sample space 11, and the other side surface is inclined to the bottom surface;

[0051] A sensor bracket 14 is provided on the bottom plate of the sample space 11 , and a sample sensor 12 is provided on the sensor bracket 14 at an end away from the bottom plate of the sample space 11 ; the sample sensor 12 extends from the bottom of the solidified soil sample 20 into the interior of the solidified soil sample 20 through the sensor bracket 14 .

[0052] In this embodiment, Figure 2 , Figure 3 as well as Figure 7 As shown, the solidified soil sample 20 of this embodiment includes a bottom surface, four side surfaces, and a top surface parallel to the bottom surface, three of the four side surfaces are perpendicular to the bottom surface and are respectively in contact with the three side baffles of the sample space 11, and the other side surface is inclined to the bottom surface. The semi-enclosed sample space 11 refers to the bottom surface and three side surfaces that surround the solidified soil sample 20, and the top surface and the inclined side surfaces of the solidified soil sample 20 are open.

[0053] Three of the four side surfaces of the solidified soil sample 20 are perpendicular to the bottom surface and are in contact with three side baffles of the sample space 11 , respectively, so as to prevent the acid from penetrating to the bottom of the sample space 11 through the gap between the solidified soil sample 20 and the sample space 11 .

[0054] In some embodiments, the spraying device includes a top spray head and an inclined spray head; the top spray head is used to spray acid onto the top surface of the solidified soil sample 20 , and the inclined spray head is used to spray acid onto the inclined side of the solidified soil sample 20 .

[0055] In this embodiment, two acid delivery pipes 13 are arranged in the width direction of the sample space 11, and two spray heads are arranged on each of the two acid delivery pipes 13, one spray head sprays acid onto the top surface of the solidified soil sample 20, and the other spray head sprays acid onto the inclined side of the solidified soil sample 20.

[0056] Such a setting can be used to simulate the erosion effect of acid rain on silt-solidified soil under flat road and slope conditions.

[0057] In some embodiments, a plurality of sample sensors 12 are arranged inside the sample space 11, and the position of each sample sensor 12 inside the sample space 11 is inconsistent with that of other sample sensors 12; the plurality of sample sensors 12 in the sample space 11 are used to detect parameters of different positions inside the solidified soil sample 20 eroded by acid.

[0058] In this embodiment, Figure 2 , Figure 3 As shown, a plurality of sample sensors 12 are arranged inside the sample space 11, and the sample sensors 12 are arranged according to the thickness of the solidified soil sample 20, and the thickness of the solidified soil sample 20 is the distance between the top surface and the bottom surface. The acid penetrates inward through the top surface and the inclined side surface of the solidified soil sample 20, and the sample sensors 12 at different thickness positions can detect the penetration and erosion speed of the acid in the solidified soil sample 20.

[0059] Furthermore, the experimental unit 10 also includes an acid liquid circulation channel, which is used to collect the acid liquid and transport the collected acid liquid to the acid liquid tank; the acid liquid circulation channel has the effect of recycling the acid liquid.

[0060] In this embodiment, Figure 1 , Figure 3 , Figure 5 as well as Figure 7 As shown, the source of the acid collected in the acid circulation channel is mainly the acid that is sprayed onto the surface of the solidified soil sample 20 but does not penetrate into the inside.

[0061] In some embodiments, the acid circulation channel includes a filter channel 21 disposed at the bottom of the sample space 11, the filter channel 21 includes a proximal end and a distal end, the acid flows into the filter channel 21 through the proximal end, and a first liquid pump 22 is disposed at the distal end of the filter channel 21, and the first liquid pump 22 is used to transport the acid at the distal end of the filter channel 21 to the acid tank; a first filter screen 23 is disposed at the proximal end of the filter channel 21, and the first filter screen 23 is used to prevent large particles of impurities from entering the filter channel 21; a sedimentation tank 24 is also disposed in the filter channel 21, and a second filter screen 25 is disposed in the sedimentation tank 24 near the distal end of the filter channel 21, and the sedimentation tank 24 and the second filter screen 25 are used to filter small particles of impurities;

[0062] A slope is provided between the sedimentation tank 24 and the far end of the filtering channel 21 , and the slope is used to guide the acid liquid filtered by the sedimentation tank 24 and the second filter screen 25 to the far end of the filtering channel 21 .

[0063] The filter channel 21 is used to filter the particles of the solidified soil sample 20 mixed in the acid solution. A first filter screen 23 is provided at the proximal end of the filter channel 21. The first filter screen 23 is used to prevent large particles of impurities from entering the filter channel 21. A sedimentation tank 24 is also provided in the filter channel 21. A second filter screen 25 is provided in the sedimentation tank 24 near the distal end of the filter channel 21. The sedimentation tank 24 and the second filter screen 25 are used to filter small particles of impurities. The sedimentation tank 24 is a liquid pool with side walls. Impurities in the acid solution are precipitated downward to the bottom of the sedimentation tank 24 by gravity, and these precipitated impurities will not flow with the acid solution due to the obstruction of the pool wall.

[0064] A slope is provided between the sedimentation tank 24 and the far end of the filter channel 21 , and the slope is used to guide the acid liquid filtered by the sedimentation tank 24 and the second filter screen 25 to the far end of the filter channel 21 , and the first liquid pump 22 recovers the acid liquid from the far end of the filter channel 21 .

[0065] In some embodiments, flow channels 26 are provided on both sides of the sample space 11. Figure 7 As shown, the diversion channel 26 is a groove, and the diversion channel 26 can divert the acid solution sprayed onto the surface of the solidified soil sample 20 but not penetrating inward and flowing from both sides of the solidified soil sample 20 to the filtering channel 21 .

[0066] The diversion channel 26 can also prevent the acid from accumulating on both sides of the solidified soil sample 20 and then penetrating into the sample space 11 through the gap between the solidified soil sample 20 and the sample space 11 .

[0067] Furthermore, the acid liquid tank includes two spaces, a proximal acid liquid tank 31 and a distal acid liquid tank 32, and a second liquid pump 33 is provided between the proximal acid liquid tank 31 and the distal acid liquid tank 32; the spray device extracts acid from the proximal acid liquid tank 31, and the first liquid pump 22 transports the acid at the distal end of the filter channel 21 to the distal acid liquid tank 32;

[0068] The proximal acid liquid tank 31 is provided with a pH detection device 41, a pH adjustment device 42 and a stirring device 43; the pH detection device 41 is used to detect the pH value of the acid liquid in the proximal acid liquid tank 31; the pH adjustment device 42 is used to inject acidic liquid and / or alkaline liquid into the proximal acid liquid tank 31 to adjust the pH value of the acid liquid in the proximal acid liquid tank 31; the stirring device 43 is used to stir the acid liquid in the proximal acid liquid tank 31;

[0069] Liquid level sensors 44 are provided in the proximal acid liquid tank 31 and the distal acid liquid tank 32 . The liquid level sensors 44 are used to detect the liquid levels of the acid liquid in the proximal acid liquid tank 31 and the distal acid liquid tank 32 .

[0070] In this embodiment, Figure 5 , Figure 6As shown, the acid liquid tank includes two spaces, the proximal acid liquid tank 31 and the distal acid liquid tank 32. The proximal acid liquid tank 31 is used to place the acid liquid after the pH is adjusted, or to provide a space for adjusting the acid liquid. The distal acid liquid tank 32 is used to temporarily store the recovered acid liquid. A second liquid pump 33 is arranged between the proximal acid liquid tank 31 and the distal acid liquid tank 32; the spray device extracts the acid liquid from the proximal acid liquid tank 31, and the first liquid pump 22 transports the acid liquid at the distal end of the filter channel 21 to the distal acid liquid tank 32.

[0071] The proximal acid liquid tank 31 is provided with a pH detection device 41, a pH adjustment device 42 and a stirring device 43; the pH detection device 41 is used to detect the pH value of the acid in the proximal acid liquid tank 31; the pH adjustment device 42 is used to inject acidic liquid and / or alkaline liquid into the proximal acid liquid tank 31 to adjust the pH value of the acid in the proximal acid liquid tank 31; the stirring device 43 is used to stir the acid in the proximal acid liquid tank 31.

[0072] The pH detection device 41 can be an electronic pH meter, and its principle is based on Bohr's law and electrochemical principles. Bohr's law is a law that describes the relationship between the concentration of hydrogen ions and the pH value in acid-base solutions. According to Bohr's law, the pH value is equal to the negative logarithm (base 10) of the hydrogen ion concentration, that is, pH = -log [H+]. Therefore, the smaller the pH value, the higher the hydrogen ion concentration in the solution, and the more acidic the solution. The electronic pH meter determines the pH value of the solution by measuring the potential difference of the electrode in the solution. The electronic pH meter usually includes a glass electrode and a reference electrode. The glass electrode is sensitive to the hydrogen ion concentration, and the reference electrode is used to provide a stable reference potential. When the glass electrode is immersed in the solution, the glass film on the surface of the glass electrode reacts with the hydrogen ions in the solution to generate a potential difference. The pH value of the solution can be calculated by measuring this potential difference.

[0073] The pH detection device 41 converts the pH into an electrical signal, and the pH adjustment device 42 is used to inject acidic liquid and / or alkaline liquid into the proximal acid liquid tank 31 to adjust the pH value of the acid in the proximal acid liquid tank 31 .

[0074] like Figure 4 As shown, the pH adjusting device 42 can be an injection container for placing a pH adjusting agent, and a driver for driving the injection container, and the driver can be a linear motor for driving the injection container piston to move.

[0075] The pH regulator can be injected into the proximal acid liquid tank 31 by the injection container to adjust the pH of the acid liquid in the proximal acid liquid tank 31. The stirring device 43 is used to stir the acid liquid in the proximal acid liquid tank 31 after the pH regulator is injected.

[0076] The liquid level sensor 44 is used to detect the liquid level of the acid liquid in the proximal acid liquid tank 31 and the distal acid liquid tank 32. The specific liquid level sensor 44 may include a low liquid level sensor 44 and a high liquid level sensor 44. Different electrical signals will be generated when the liquid contacts or does not contact the liquid level sensor 44. When the liquid level is lower than the low liquid level sensor 44, an electrical signal may be output to replenish the liquid.

[0077] In some embodiments, the experimental unit 10 further includes an air blowing device 51, which is used to blow air to the surface of the solidified soil sample 20 to simulate the weathering of the solidified soil sample 20 by natural wind in the natural environment. The experimental unit 10 further includes a light source 52, which is used to illuminate the surface of the solidified soil sample 20 to simulate the influence of sunlight on the solidified soil sample 20 in the natural environment.

[0078] The air blowing device 51 may be a spiral blade and a motor driving the spiral blade to rotate, and the air blowing device 51 is used to blow air to the surface of the solidified soil sample 20, and the light source 52 is used to illuminate the surface of the solidified soil sample 20 to simulate the weathering and sunlight of the natural wind in the natural environment on the solidified soil sample 20. For some silt solidified soil, the erosion effect of acid rain on it is different under different weathering degrees and sunlight.

[0079] In some embodiments, the silt solidified soil acid rain erosion simulation experimental device includes multiple experimental units 10, and the acid liquid tank of each experimental unit 10 is respectively filled with acid liquid with different pH values; the silt solidified soil acid rain erosion simulation experimental device can simultaneously test the erosion effect of acid rain with different pH values ​​on solidified soil.

[0080] like Figure 8 As shown, the silt solidified soil acid rain erosion simulation experimental device of this embodiment includes 4 experimental units 10, and the acid liquid tank of each experimental unit 10 is respectively filled with acid liquid with different pH values; the silt solidified soil acid rain erosion simulation experimental device can simultaneously test the erosion effect of acid rain with different pH values ​​on solidified soil.

[0081] In some embodiments, a third filter screen is provided at the bottom of the proximal acid liquid tank 31 and the distal acid liquid tank 32, the water inlet of the second liquid pump 33 and the spray device is above the third filter screen, and the water outlet of the second liquid pump 33 and the first liquid pump 22 is provided below the third filter screen. The acid liquid input into the proximal acid liquid tank 31 and the distal acid liquid tank 32 is input through the bottom of the third filter screen, and after being filtered by the third filter screen, it is input into the proximal acid liquid tank 31 and the spray device, which can play a further filtering role.

[0082] The various embodiments disclosed in the present invention have been described above. The above description is exemplary and not exhaustive, and the scope of the present invention is not limited to the above embodiments. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the spirit and scope of the present invention. In other words, those of ordinary skill in the art can make various changes and improvements to the present invention in form and detail, and these are considered to fall within the scope of protection of the present invention. The choice of terms used herein is intended to best explain the principles of the various embodiments, practical applications, or improvements to the technology in the market, or to enable those of ordinary skill in the art to understand the various embodiments disclosed herein.

Claims

1. A silt solidified soil acid rain erosion simulation experimental device, used for comparative testing of solidified soil under acid rain erosion of different acidities; characterized by: The silt solidified soil acid rain erosion simulation experimental device comprises an experimental unit (10); the experimental unit (10) comprises a sample space (11) for placing a solidified soil sample (20), a sample sensor (12) arranged in the sample space (11) for monitoring sample parameters, an acid liquid tank for placing acid liquid, and a spraying device for extracting acid liquid from the acid liquid tank and spraying the acid liquid onto the outer surface of the solidified soil sample (20); The acid liquid is a liquid adjusted to a specific pH value. The spraying device sprays the acid liquid onto the surface of the solidified soil sample (20). The acid liquid penetrates from the surface of the solidified soil sample (20) into the interior of the solidified soil sample (20), simulating the erosion effect of acid rain on the solidified soil sample (20). The sample sensor (12) is used to detect the erosion parameters of the acid liquid on the solidified soil sample (20) inside the solidified soil sample (20).

2. The silt solidification soil acid rain erosion simulation experimental device according to claim 1 is characterized by: The sample space (11) comprises a semi-enclosed space surrounded by three side baffles and a bottom plate, two of the three side baffles being opposite to each other are in a symmetrical trapezoidal shape, and the other side baffle and the bottom plate are in a rectangular shape; the solidified soil sample (20) is a trapezoidal body having four side surfaces, three of the four side surfaces are perpendicular to the bottom surface and are in contact with the three side baffles of the sample space (11) respectively, and the other side surface is inclined to the bottom surface; A sensor bracket (14) is arranged on the bottom plate of the sample space (11), and the sample sensor (12) is arranged on the end of the sensor bracket (14) away from the bottom plate of the sample space (11); the sample sensor (12) extends from the bottom of the solidified soil sample (20) into the interior of the solidified soil sample (20) through the sensor bracket (14).

3. The silt solidification soil acid rain erosion simulation experimental device according to claim 2 is characterized by: The spraying device comprises a top spray head and an inclined spray head; the top spray head is used to spray acid liquid onto the top surface of the solidified soil sample (20), and the inclined spray head is used to spray acid liquid onto the inclined side surface of the solidified soil sample (20).

4. The silt solidification soil acid rain erosion simulation experimental device according to claim 2 is characterized by: A plurality of sample sensors (12) are arranged inside the sample space (11), and the position of each sample sensor (12) and other sample sensors (12) inside the sample space (11) are inconsistent; the plurality of sample sensors (12) inside the sample space (11) are used to detect parameters of different positions inside the solidified soil sample (20) eroded by acid.

5. The silt solidification soil acid rain erosion simulation experimental device according to claim 1, characterized in that: The experimental unit (10) also includes an acid liquid circulation channel, which is used to collect the acid liquid and transport the collected acid liquid to the acid liquid tank; the acid liquid circulation channel has the effect of recycling the acid liquid.

6. The silt solidification soil acid rain erosion simulation experimental device according to claim 5, characterized in that: The acid liquid circulation channel comprises a filter channel (21) arranged at the bottom of the sample space (11), the filter channel (21) comprising a proximal end and a distal end, the acid liquid flows into the filter channel (21) through the proximal end, a first liquid pump (22) is arranged at the distal end of the filter channel (21), the first liquid pump (22) is used to transport the acid liquid at the distal end of the filter channel (21) to the acid liquid tank; a first filter screen (23) is arranged at the proximal end of the filter channel (21), the first filter screen (23) is used to prevent large particles of impurities from entering the filter channel (21); a sedimentation tank (24) is also arranged in the filter channel (21), a second filter screen (25) is arranged in the sedimentation tank (24) near the distal end of the filter channel (21), the sedimentation tank (24) and the second filter screen (25) are used to filter small particles of impurities; A slope is provided between the sedimentation tank (24) and the far end of the filtration channel (21), and the slope is used to guide the acid liquid filtered by the sedimentation tank (24) and the second filter screen (25) to the far end of the filtration channel (21).

7. The silt solidification soil acid rain erosion simulation experimental device according to claim 6, characterized in that: The acid liquid tank comprises two spaces, a proximal acid liquid tank (31) and a distal acid liquid tank (32), and a second liquid pump (33) is arranged between the proximal acid liquid tank (31) and the distal acid liquid tank (32); the spray device extracts acid liquid from the proximal acid liquid tank (31), and the first liquid pump (22) transports the acid liquid at the distal end of the filter channel (21) to the distal acid liquid tank (32); The proximal acid liquid tank (31) is provided with a pH detection device (41), a pH adjustment device (42) and a stirring device (43); the pH detection device (41) is used to detect the pH value of the acid liquid in the proximal acid liquid tank (31); the pH adjustment device (42) is used to inject acidic liquid and / or alkaline liquid into the proximal acid liquid tank (31) to adjust the pH value of the acid liquid in the proximal acid liquid tank (31); the stirring device (43) is used to stir the acid liquid in the proximal acid liquid tank (31); Liquid level sensors (44) are provided in the proximal acid liquid tank (31) and the distal acid liquid tank (32), and the liquid level sensors (44) are used to detect the liquid levels of the acid liquid in the proximal acid liquid tank (31) and the distal acid liquid tank (32).

8. The silt solidification soil acid rain erosion simulation experimental device according to claim 1, characterized in that: The experimental unit (10) further comprises an air blowing device (51), which is used to blow air toward the surface of the solidified soil sample (20) to simulate the weathering of the solidified soil sample (20) by natural wind in a natural environment.

9. The silt solidification soil acid rain erosion simulation experimental device according to claim 1, characterized in that: The experimental unit (10) further comprises a light source (52), wherein the light source (52) is used to illuminate the surface of the solidified soil sample (20) to simulate the influence of sunlight on the solidified soil sample (20) in a natural environment.

10. A silt solidified soil acid rain erosion simulation experimental device according to any one of claims 1 to 9, characterized in that: The silt solidified soil acid rain erosion simulation experimental device comprises a plurality of experimental units (10), wherein the acid liquid tank of each experimental unit (10) is respectively filled with acid liquids with different pH values; the silt solidified soil acid rain erosion simulation experimental device can simultaneously test the erosion effects of acid rains with different pH values ​​on solidified soil.

Images