Device and method for testing salt content of salinized soil

Abstract

The invention discloses a device and a method for testing the salt content of salinized soil. The device comprises a left water tank, a valve, a guide rail, a knob, a right water tank, a heating wire, an air compressor, a rotary stirrer, a phenolphthalein rod, a water injection guide pipe, a rotary nozzle, a flushing chamber, a filter screen, a water storage chamber, a lifting rope, a moisture sensor, a heating sheet, an exhaust port and a salt leaching chamber. During testing, salinized soil is weighed and placed at the bottom of the salt leaching chamber, after water is sprayed to the salinized soil through the left water tank, the rotary stirrer is started to crush the salinized soil, meanwhile, the valve of the right water tank is opened, the air compressor and the heating wire are started, and high-temperature, high-pressure and high-humidity air is formed and enters the salt leaching chamber to conduct washing and salt leaching on the salinized soil; the phenolphthalein rod is moved through the rotary knob and the guide rail to detect whether salinized soil at different positions still contains salt or not, and saline water in the water storage chamber is dried through the heating piece. Finally, the salt particles are weighed, the salt content is calculated, salinized soil salt content testing is completed, and the method has important significance in salinized soil salt content quantitative judgment and whether engineering application can be carried out or not.

Description

Technical Field

[0001] This invention belongs to the field of engineering application technology of saline soil, and in particular relates to a device and method for testing the salt content of saline soil. Background Technology

[0002] Due to the engineering characteristics of saline soil, such as salt swelling and solution collapse, its mechanical properties differ significantly from those of traditional roadbed fillers. For example, a salt content of less than 2% indicates that it can be used for the subbase of low-grade highways. However, the main challenge in the application of saline soil subgrades remains the difficulty in testing its salt content.

[0003] The salinity testing device and method for saline soil is used to evaluate the salinity of saline soil and achieve its rational and effective utilization. Current testing devices are not perfect; therefore, this proposed device and method enable rapid on-site testing and assessment of salinity in saline soil, which is of great significance for roadbed construction using saline soil.

[0004] In view of this, the present invention discloses a salinity testing device and method for saline soil, which can quickly test the salinity on the construction site. The device is simple, easy to operate, and highly automated, and can be used on the construction site. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in the current application of saline soil in roadbed filling. It develops a saline soil salt content testing device and testing method, which realizes rapid testing and identification of saline soil, and clarifies whether it can be used in engineering. The device has a reasonable structural design, is fast and efficient, and the method is simple to operate and energy-saving and environmentally friendly.

[0006] The salinity testing device for saline soil includes a left water tank, valve, guide rail, knob, right water tank, heating wire, air compressor, rotary stirrer, phenolphthalein rod, water injection pipe, rotary nozzle, rinsing chamber, filter screen, water storage chamber, suspension rope, moisture sensor, heating element, exhaust port, and salt washing chamber.

[0007] Furthermore, the phenolphthalein rod includes left and right phenolphthalein rods, which are suspended in the salt washing chamber and can be moved up and down by a knob. The guide rail can move the phenolphthalein rod left and right to detect the salinity at different positions. The inside is an iron rod with a layer of phenolphthalein on the surface. When the phenolphthalein comes into contact with the salt NaCl, a chemical reaction occurs, turning it red, indicating that the salt in the soil particles has not been washed away and further washing is required.

[0008] Furthermore, the moisture sensor is suspended in the water storage chamber by a rope and can move up and down to detect different parts, which is used to detect whether the saline soil is dried and to determine whether to continue heating and drying.

[0009] Furthermore, the air compressor delivers pressurized air to the salt washing chamber through an air supply pipe. A heating wire is installed inside the air supply pipe to heat the air. A small amount of water is injected through the right water tank, allowing the high-temperature, high-pressure, and high-humidity air to enter the salt washing chamber and fully dissolve and wash away the salt in the soil particles.

[0010] Furthermore, the rotary agitator can expand its blades as the rotation speed increases, which allows the saline soil particles to be fully broken down and fully contacted with the high-temperature, high-pressure, and high-humidity gas, ensuring that the salt on the particle surface is fully dissolved and washed away.

[0011] Furthermore, the filter screen is located at the bottom of the salt washing chamber, with a mesh size of less than 0.001 mm, which allows water to enter the next stage of the rinsing chamber while preventing soil particles from entering.

[0012] Furthermore, the heating element is located at the bottom of the water storage chamber, which can heat and dry the filtered water containing salt, and finally weigh the salt, calculate the salt content, and complete the salt content test of the saline soil.

[0013] The operating method of the above-mentioned salinity testing device for saline soil is as follows: During testing, a certain amount of saline soil is weighed and placed at the bottom of the washing chamber. After a measured amount of water is sprayed onto the saline soil through the left water tank, the water spray valve is closed, and the rotary agitator is started to break up the saline soil. Simultaneously, the right water tank valve is opened, and the air compressor and heating wire are started to create high-temperature, high-pressure, and high-humidity air that enters the washing chamber to wash the saline soil. After a certain period of time, the phenolphthalein rod is moved using a knob and guide rail to check whether the saline soil at different locations still contains salt. If the phenolphthalein rod turns red, it indicates that it has not been washed clean. Stirring continues, and high-temperature, high-pressure, and high-humidity air is continuously injected for washing until the phenolphthalein rod does not change color at the next test, proving that the salt has been washed away. Due to the presence of the filter screen, the soil particles are not... The brine will enter the rinsing chamber, where salty water will also enter. Due to the presence of high-temperature, high-pressure gas, some brine will remain on the surface of the filter screen and the inner wall of the rinsing chamber. Therefore, the rotating nozzle is turned on to rinse the filter screen and the inner wall of the rinsing chamber to ensure that the salt does not adhere to the inner wall of the rinsing chamber. The lower part of the rinsing chamber has a funnel structure, which facilitates all the brine to enter the water storage chamber. The brine in the water storage chamber is dried by heating elements. Whether the water is completely dried is detected by a moisture sensor at the bottom of the suspension rope to ensure that there is no moisture left in the salt particles in the water storage chamber. After it is completely dried, the salt particles are weighed, the salt content is calculated, and the salt content test of the saline soil is completed. This is of great significance for the quantitative determination of the salt content of saline soil and whether it can be used in engineering.

[0014] The advantages and technical effects of this invention are as follows: 1. The phenolphthalein rod consists of left and right phenolphthalein rods, which are suspended in the salt washing chamber. They can be moved up and down by a knob, and the guide rail can move the phenolphthalein rods left and right to detect the salinity at different positions. The inside is an iron rod with a layer of phenolphthalein on the surface. When phenolphthalein comes into contact with salt NaCl, a chemical reaction occurs and it turns red, indicating that the salt in the soil particles has not been washed away and further washing is required. 2. The air compressor delivers pressurized air to the salt washing chamber through the air supply pipe. The heating wire is installed inside the air supply pipe to heat the air. A small amount of water is injected through the right water tank, so that the high-temperature, high-pressure, and high-humidity air enters the salt washing chamber to fully dissolve and wash away the salt in the soil particles. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention. In the diagram: 1—Left water tank, 2—Valve, 3—Guide rail, 4—Knob, 5—Right water tank, 6—Heating wire, 7—Air compressor, 8—Rotary agitator, 9—Phenolphthalein rod, 10—Water injection pipe, 11—Rotary nozzle, 12—Rinsing chamber, 13—Filter screen, 14—Water storage chamber, 15—Hanging rope, 16—Moisture sensor, 17—Heating element, 18—Exhaust port, 19—Salt washing chamber. Detailed Implementation

[0016] The structure and operation method of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Example 1

[0017] See Figure 1 The salinity testing device for saline soil includes a left water tank, valves, guide rails, knobs, a right water tank, heating wires, an air compressor, a rotary stirrer, phenolphthalein rods, a water injection pipe, a rotary nozzle, a rinsing chamber, a filter screen, a water storage chamber, a hanging rope, a moisture sensor, a heating element, an exhaust port, and a salt washing chamber.

[0018] The phenolphthalein rods include left and right phenolphthalein rods, which are suspended in the salt washing chamber. They can be moved up and down by a knob, and the guide rails can move the phenolphthalein rods left and right to detect the salinity at different positions. The inside is an iron rod with a layer of phenolphthalein on the surface. When the phenolphthalein comes into contact with the salt NaCl, a chemical reaction occurs, turning it red, indicating that the salt in the soil particles has not been washed away and further washing is required.

[0019] The moisture sensor is suspended from the water storage chamber by a rope and can move up and down to detect different parts of the soil. It is used to detect whether the saline soil is dry and to determine whether to continue heating and drying.

[0020] The air compressor delivers pressurized air to the salt washing chamber through an air supply pipe. A heating wire is installed inside the air supply pipe to heat the air. A small amount of water is injected through the right water tank, allowing the high-temperature, high-pressure, and high-humidity air to enter the salt washing chamber and fully dissolve and wash away the salt in the soil particles.

[0021] The rotary agitator can expand its blades as the rotation speed increases, which allows the saline soil particles to be fully broken down and fully contacted with the high-temperature, high-pressure, and high-humidity gas, ensuring that the salt on the particle surface is fully dissolved and washed away.

[0022] The filter screen is located at the bottom of the salt washing chamber, with a mesh size of less than 0.001 mm, which allows water to enter the next stage of the rinsing chamber while preventing soil particles from entering.

[0023] The heating element is located at the bottom of the water storage chamber, which can heat and dry the filtered water containing salt, and finally weigh the salt, calculate the salt content, and complete the salt content test of the saline soil.

[0024] The operating method of the above-mentioned salinity testing device for saline soil is as follows: During testing, a certain amount of saline soil is weighed and placed at the bottom of the washing chamber. After a measured amount of water is sprayed onto the saline soil through the left water tank, the water spray valve is closed, and the rotary agitator is started to break up the saline soil. Simultaneously, the right water tank valve is opened, and the air compressor and heating wire are started to create high-temperature, high-pressure, and high-humidity air that enters the washing chamber to wash the saline soil. After a certain period of time, the phenolphthalein rod is moved using a knob and guide rail to check whether the saline soil at different locations still contains salt. If the phenolphthalein rod turns red, it indicates that it has not been washed clean. Stirring continues, and high-temperature, high-pressure, and high-humidity air is continuously injected for washing until the phenolphthalein rod does not change color at the next test, proving that the salt has been washed away. Due to the presence of the filter screen, the soil particles are not... The brine will enter the rinsing chamber, where salty water will also enter. Due to the presence of high-temperature, high-pressure gas, some brine will remain on the surface of the filter screen and the inner wall of the rinsing chamber. Therefore, the rotating nozzle is turned on to rinse the filter screen and the inner wall of the rinsing chamber to ensure that the salt does not adhere to the inner wall of the rinsing chamber. The lower part of the rinsing chamber has a funnel structure, which facilitates all the brine to enter the water storage chamber. The brine in the water storage chamber is dried by heating elements. Whether the water is completely dried is detected by a moisture sensor at the bottom of the suspension rope to ensure that there is no moisture left in the salt particles in the water storage chamber. After it is completely dried, the salt particles are weighed, the salt content is calculated, and the salt content test of the saline soil is completed. This is of great significance for the quantitative determination of the salt content of saline soil and whether it can be used in engineering.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A device for testing the salinity of saline soil, characterized in that: The device includes a left water tank, valves, guide rails, knobs, a right water tank, heating wires, an air compressor, a rotary stirrer, phenolphthalein rods, a water injection pipe, a rotary nozzle, a rinsing chamber, a filter screen, a water storage chamber, a suspension rope, a moisture sensor, a heating element, an exhaust port, and a salt washing chamber. The phenolphthalein rods, consisting of left and right rods suspended in the salt washing chamber, can be moved up and down via the knob. The guide rail allows for left and right movement of the phenolphthalein rods, enabling salinity detection at different locations. The rods are made of iron with a layer of phenolphthalein on their surface. When the phenolphthalein encounters NaCl (salt), a chemical reaction occurs, turning the surface red, indicating that the soil particles have not been thoroughly rinsed of salt and require further rinsing. The moisture sensor, suspended in the water storage chamber by the suspension rope, can move up and down to detect different locations and is used to determine whether the saline soil is dry and whether further heating is needed. The air compressor delivers pressurized air to the salt washing chamber through an air injection pipe. The heating wire is located inside the air injection pipe to heat the air. Water is injected through the right water tank, allowing the high-temperature, high-pressure, and high-humidity air to enter the salt washing chamber and thoroughly dissolve and rinse the soil particles of salt.

2. The apparatus according to claim 1, characterized in that: The rotary agitator can expand its blades as the rotation speed increases, which allows the saline soil particles to be fully broken down and fully contacted with the high-temperature, high-pressure, and high-humidity gas, ensuring that the salt on the particle surface is fully dissolved and washed away.

3. The apparatus according to claim 1, characterized in that: The filter screen is located at the bottom of the salt washing chamber, with a mesh size of less than 0.001 mm, which allows water to enter the next stage of the rinsing chamber while preventing soil particles from entering.

4. The apparatus according to claim 1, characterized in that: The heating element is located at the bottom of the water storage chamber, which can heat and dry the filtered water containing salt, and finally weigh the salt, calculate the salt content, and complete the salt content test of the saline soil.

5. The operating method of the salinity testing device for saline soil according to any one of claims 1-4, characterized in that, The specific operating steps are as follows: During the test, the weighed saline soil is placed at the bottom of the washing chamber. After spraying a measured amount of water into the saline soil through the left water tank, the water spray valve is closed, and the rotary agitator is started to break up the saline soil. At the same time, the right water tank valve is opened, and the air compressor and heating wire are started to generate high-temperature, high-pressure, and high-humidity air that enters the washing chamber to wash the saline soil. After a certain period of time, the phenolphthalein rod is moved by the knob and guide rail to test whether the saline soil at different locations still contains salt. If the phenolphthalein rod turns red, it indicates that it has not been washed clean. Stirring continues, and high-temperature, high-pressure, and high-humidity air is continuously injected for washing until the phenolphthalein rod does not change color at the next test, proving that the salt content is low. After rinsing, soil particles will not enter the rinsing chamber due to the presence of the filter screen, while salt water will enter. Due to the presence of high-temperature and high-pressure gas, some salt water will remain on the surface of the filter screen and the inner wall of the rinsing chamber. The rotating nozzle is turned on to rinse the filter screen and the inner wall of the rinsing chamber, ensuring that salt does not adhere to the inner wall of the rinsing chamber. The lower part of the rinsing chamber has a funnel structure, which facilitates all the salt water to enter the water storage chamber. The salt water in the water storage chamber is dried by heating elements. Whether the water is completely dried is detected by a moisture sensor at the bottom of the suspension rope. It is ensured that there is no moisture left in the salt particles in the water storage chamber. The salt particles are then weighed and the salt content is calculated to complete the salinity test of the saline soil.

Images