Experimental device for measuring migration rule of volatile organic pollutants

Abstract

The utility model discloses an experimental device for measuring the migration rule of volatile organic pollutants. The soil liquid collector and the soil parameter sensor are arranged on the simulation column assembly; the circulating water outlet is formed in the top of the simulation column assembly; the circulating water inlet and the underground water inlet are formed in the two sides of the bottom of the simulation column assembly; the water area circulating device is connected to the circulating water inlet and the circulating water outlet; the peristaltic pump and the water tank are connected to the underground water inlet. Through the combined arrangement of the column interlayer, the circulating water outlet, the water area circulating device and the circulating water inlet, the freezing and thawing experiment effect is realized; through the arrangement of an air layer, an air sampling component, an air circulating component and the like, the gas-phase pollution of the organic polluted soil body can be determined in the organic polluted soil body determination process; by arranging the heat preservation layer, the temperature of the deep soil body is guaranteed, and the influence of a water area in the side column interlayer is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of volatile organic pollutant determination, in particular to an experimental device for determining the migration law of volatile organic pollutants. Background Art

[0002] Among many pollutants, volatile organic pollutants are difficult to treat due to their unique three-phase (gas-liquid-NAPL) properties. In particular, when NAPL enters a low-permeability closed layer composed of fine particles, it is trapped in the closed layer, causing persistent pollution and causing serious damage to public health and the environment. Especially when it is in soil containing groundwater, seasonal changes such as freeze-thaw make it more difficult to measure the migration changes of its pollutants, so targeted device settings are required. Utility Model Content

[0003] The utility model provides an experimental device for determining the migration law of volatile organic pollutants, which is used to solve

[0004] Technical issues such as freezing and thawing of soil contaminated by organic pollutants, groundwater level fluctuations, and determination of migration of various phases at multiple interfaces.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An experimental device for determining the migration law of volatile organic pollutants, comprising a simulation column assembly, a soil liquid collector and a soil parameter sensor arranged on the simulation column assembly, a circulating water outlet arranged on the top of the simulation column assembly, a circulating water inlet and a groundwater inlet arranged on both sides of the bottom of the simulation column assembly, a water area circulation device connected to the circulating water inlet and the circulating water outlet, and a peristaltic pump and a water tank connected to the groundwater inlet;

[0007] The simulated column assembly comprises a column body, a column interlayer arranged around the column body, and a column cover detachably connected to the top of the column body;

[0008] The column interlayer is provided with a circulating water outlet and a circulating water inlet, and the groundwater inlet directly penetrates into the column body and is connected to the water tank through a peristaltic pump;

[0009] The column cover is provided with a gas sampling port and an air port, the gas sampling port is connected to the gas sampling device; the air port is connected in series with the gas flow rate instrument and the air cleaning device.

[0010] Furthermore, the gas sampling port and the air port are both tubular holes, and the gas sampling port and the air port are both made integrally with the column cover.

[0011] Furthermore, a temperature sensor is provided at the bottom of the column cover, and the temperature sensor is connected to the control terminal.

[0012] Furthermore, the water tank forms a U-shaped connection with the column body, and a stable submerged layer is formed through the U-shaped device principle, and the top surface of the submerged layer is the groundwater level.

[0013] Furthermore, the column body is filled with contaminated soil, and a thermal insulation layer is also provided inside the corresponding column body.

[0014] Furthermore, the insulation layer is a flexible insulation and waterproof material, and the insulation layer is arranged along the inner wall of the column body in a circumferential direction; the bottom of the insulation layer corresponds to the inner bottom of the column body, and the top of the insulation layer is located at the top of the contaminated soil.

[0015] Furthermore, temperature control devices are respectively provided at the circulating water inlet and the circulating water outlet, and the temperature control device and the water area circulation device are arranged in parallel; the interlayer water area is filled with ethylene glycol solutions of different concentrations according to the design temperature requirements.

[0016] The beneficial effects of the utility model are embodied in:

[0017] 1) The utility model is conducive to controlling the temperature of the contaminated soil in the column body through the joint arrangement of the column interlayer, the circulating water outlet, the water circulation device and the circulating water inlet, thereby achieving the freeze-thaw experimental effect;

[0018] 2) The utility model is conducive to ensuring that the gas phase pollution of organic polluted soil is measured during the measurement process through the arrangement of air layer and air sampling and circulation components, so as to more comprehensively measure the migration of organic pollutants;

[0019] 3) The utility model is conducive to ensuring the setting of the phreatic layer in the contaminated soil body through the setting of the groundwater inlet, peristaltic pump and water tank;

[0020] 4) The utility model provides a heat-insulating layer and a temperature sensor, wherein the heat-insulating layer is conducive to ensuring that the temperature of the deep soil is transferred from top to bottom, thereby reducing the influence of the water area in the side column interlayer; the temperature sensor is conducive to ensuring the adaptability of the air temperature.

[0021] Other features and advantages of the utility model will be described in the subsequent description, and in part will become apparent from the description, or be understood by implementing the utility model; the main purpose and other advantages of the utility model can be realized and obtained through the solutions particularly pointed out in the description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the experimental device for determining the migration law of volatile organic pollutants;

[0023] Figure 2 It is a schematic diagram of the column body and its connection structure.

[0024] Figure numerals: 1-simulation column assembly, 101-column body, 102-column interlayer, 103-column cover, 2-soil liquid collector, 3-soil parameter sensor, 4-circulating water outlet, 5-water area circulation device, 6-circulating water inlet, 7-gas sampling port, 8-gas sampling device, 9-air port, 10-gas flow rate instrument, 11-air cleaning device, 12-groundwater inlet, 13-peristaltic pump, 14-water tank, 15-temperature sensor. DETAILED DESCRIPTION

[0025] An experimental device for determining the migration law of volatile organic pollutants comprises a simulation column assembly 1, a soil liquid collector 2 and a soil parameter sensor 3 arranged on the simulation column assembly 1, a circulating water outlet 4 arranged on the top of the simulation column assembly 1, a circulating water inlet 6 and a groundwater inlet 12 arranged on both sides of the bottom of the simulation column assembly 1, a water area circulation device 5 connected to the circulating water inlet 6 and the circulating water outlet 4, and a peristaltic pump 13 and a water tank 14 connected to the groundwater inlet 12.

[0026] In this embodiment, the soil liquid collector 22 collects the contaminated liquid in the soil; the soil parameter sensor 33 is externally connected to the control terminal and internally inserted into the contaminated soil body 16; the soil parameter sensor 33 measures the temperature, humidity, conductivity and pH in the index soil.

[0027] In this embodiment, the simulated column assembly 1 includes a column body 101, a column interlayer 102 disposed around the column body 101, and a column cover 103 detachably connected to the top of the column body 101. The column body 101 and the column interlayer 102 are made of organic glass.

[0028] In this embodiment, a circulating water outlet 4 and a circulating water inlet 6 are provided on the column interlayer 102 , and a groundwater inlet 12 directly penetrates into the column body 101 and is connected to a water tank 14 through a peristaltic pump 13 .

[0029] In this embodiment, a gas sampling port 7 and an air port 9 are provided on the column cover 103, and the gas sampling port 7 is connected to the gas sampling device 8; the air port 9 is connected in series with the gas flow rate instrument 10 and the air cleaning device 11. The gas sampling port 7 and the air port 9 are both tubular holes, and the gas sampling port 7 and the air port 9 are made integrally with the column cover 103. A temperature sensor 15 is also provided at the bottom of the column cover 103, and the temperature sensor 15 is connected to the control terminal.

[0030] In this embodiment, the water tank 14 forms a U-shaped connection with the column body 101, and a stable submerged layer is formed through the U-shaped device principle, and the top surface of the submerged layer is the groundwater level.

[0031] In this embodiment, the column body 101 is filled with contaminated soil, and a thermal insulation layer is also provided inside the corresponding column body 101. The thermal insulation layer is a flexible thermal insulation and waterproof material, and the thermal insulation layer is arranged along the inner wall of the column body 101 in a circumferential direction; the bottom of the thermal insulation layer corresponds to the bottom of the column body 101, and the top of the thermal insulation layer is located at the top of the contaminated soil. The thermal insulation layer is 3 mm thick.

[0032] In this embodiment, temperature control devices are respectively provided at the circulating water inlet 6 and the circulating water outlet 4, and the temperature control device and the water area circulation device 5 are arranged in parallel; the interlayer water area is filled with ethylene glycol solutions of different concentrations according to the design temperature requirements.

[0033] The above description is only a preferred specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that a technician familiar with the technical field thinks of within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. An experimental device for determining the migration law of volatile organic pollutants, characterized in that: The invention comprises a simulation column assembly (1), a soil liquid collector (2) and a soil parameter sensor (3) arranged on the simulation column assembly (1), a circulating water outlet (4) arranged on the top of the simulation column assembly (1), a circulating water inlet (6) and a groundwater inlet (12) arranged on both sides of the bottom of the simulation column assembly (1), a water area circulation device (5) connected to the circulating water inlet (6) and the circulating water outlet (4), and a peristaltic pump (13) and a water tank (14) connected to the groundwater inlet (12); The simulated column assembly (1) comprises a column body (101), a column interlayer (102) arranged around the column body (101), and a column cover (103) detachably connected to the top of the column body (101); The column interlayer (102) is provided with a circulating water outlet (4) and a circulating water inlet (6); the groundwater inlet (12) directly penetrates into the column body (101) and is connected to the water tank (14) via a peristaltic pump (13); The column cover (103) is provided with a gas sampling port (7) and an air port (9); the gas sampling port (7) is connected to a gas sampling device (8); and the air port (9) is connected in series with a gas flow rate instrument (10) and an air cleaning device (11).

2. The experimental device for determining the migration law of volatile organic pollutants according to claim 1, characterized in that: The gas sampling port (7) and the air port (9) are both tubular holes, and the gas sampling port (7) and the air port (9) are integrally manufactured with the column cover (103).

3. The experimental device for determining the migration law of volatile organic pollutants according to claim 1, characterized in that: A temperature sensor (15) is also provided at the bottom of the column cover (103), and the temperature sensor (15) is connected to the control terminal.

4. The experimental device for determining the migration law of volatile organic pollutants according to claim 1, characterized in that: The water tank (14) and the column body (101) form a U-shaped connection, and a stable submerged layer is formed through the U-shaped device principle, and the top surface of the submerged layer is the underground water level line.

5. The experimental device for determining the migration law of volatile organic pollutants according to claim 1, characterized in that: The column body (101) is filled with contaminated soil, and a thermal insulation layer is also provided inside the corresponding column body (101).

6. The experimental device for determining the migration law of volatile organic pollutants according to claim 5, characterized in that: The thermal insulation layer is a flexible thermal insulation and waterproof material, and is arranged along the inner wall of the column body (101) in a circumferential direction; the bottom of the thermal insulation layer corresponds to the inner bottom of the column body (101), and the top of the thermal insulation layer is located at the top of the contaminated soil.

7. The experimental device for determining the migration law of volatile organic pollutants according to claim 1, characterized in that: Temperature control devices are respectively provided at the circulating water inlet (6) and the circulating water outlet (4), and the temperature control device and the water area circulation device (5) are arranged in parallel; the interlayer water area is filled with ethylene glycol solutions of different concentrations according to the design temperature requirements.

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