CN214767767U

CN214767767U - Contaminated site in-situ multiphase extraction DNAPL separation and repair device

Info

Publication number: CN214767767U
Application number: CN202120946055.7U
Authority: CN
Inventors: 梁信; 李娜
Original assignee: Jiangsu Zhongchuan Ecological Environment Co Ltd
Current assignee: Jiangsu Zhongchuan Ecological Environment Co Ltd
Priority date: 2021-05-06
Filing date: 2021-05-06
Publication date: 2021-11-19
Anticipated expiration: 2031-05-06

Abstract

The utility model discloses a contaminated site in-situ multiphase extraction DNAPL separation and restoration device, which comprises a soil layer, an extraction well is fixedly arranged in the soil layer, a water permeable sieve tube is fixedly arranged at the lower end of the inner wall of the extraction well, the bottom end of the water-permeable sieve tube is fixedly connected with a DNAPL collecting device, the upper surface of the soil layer is provided with a liquid pump and a liquid storage tank, a liquid storage cavity is arranged inside the liquid storage tank, an oil-gas separator is fixedly arranged at the top end inside the liquid storage tank, the bottom end of the oil-gas separator is communicated with the liquid storage cavity through a connecting pipe, the right end of the oil-gas separator is fixedly connected with an exhaust pipe, the inclined baffle arranged at the bottom of the wall pipe can block DNAPL sinking into the wall pipe due to overlarge density to be gathered in the wall pipe, when DNAPL is full, the DNAPL is independently pumped out, so that the blockage of pumping equipment can be avoided, and the loss and maintenance frequency of the equipment are reduced.

Description

Contaminated site in-situ multiphase extraction DNAPL separation and repair device

Technical Field

The utility model relates to a pollute place separation prosthetic devices technical field, especially relate to a pollute heterogeneous DNAPL separation prosthetic devices of extracting in place.

Background

The multiphase extraction (DPE) technology is a polluted site in-situ remediation technology, and is characterized in that water is pumped around an extraction well to form a water level funnel, and air is simultaneously pumped to remove newly exposed severe volatile substances in unsaturated soil by using vacuum negative pressure. The technology is commonly used for in-situ remediation of volatile organic contaminated sites with poor permeability while treating contaminants in the soil gas phase and the underground water phase.

In a volatile organic field with higher pollution concentration, the pollutants exist in more phases, besides a dissolved phase dissolved in underground water and a gas phase volatilized into soil pores, a free phase in which the pollutants are simply gathered also exists, when the specific gravity of the free phase is higher, heavy non-aqueous phase liquid (DNAPL) is formed at the bottom of an aquifer, and due to the fact that the DNAPL is high in viscosity, ordinary DPE is difficult to remove the DNAPL and remove the pollutants in the gas phase and the water phase. DNAPL in a stratum can continuously release pollutants into the stratum, so that the long-time restoration cannot reach the standard easily, and therefore the DNAPL separation and restoration device for in-situ multiphase extraction of the polluted site is provided.

SUMMERY OF THE UTILITY MODEL

In order to overcome the deficiency of the prior art, the utility model provides a contaminated site normal position multiphase extraction DNAPL separation prosthetic devices improves the DPE system, makes it increase the function of getting rid of DNAPL on original function of handling gaseous phase and aqueous phase pollutant to shorten the repair cycle in the volatile organic site contaminated site of high concentration to containing DNAPL.

In order to solve the technical problem, the utility model provides a following technical scheme: the in-situ multiphase extraction DNAPL separation and repair device for the polluted site comprises a soil layer, wherein an extraction well is fixedly installed inside the soil layer, a water permeable sieve pipe is fixedly installed at the lower end of the inner wall of the extraction well, a DNAPL collection device is fixedly connected to the bottom end of the water permeable sieve pipe, a liquid pump and a liquid storage tank are arranged on the upper surface of the soil layer, a liquid storage cavity is formed in the liquid storage tank, an oil-gas separator is fixedly installed at the top end inside the liquid storage tank, the bottom end of the oil-gas separator is communicated with the liquid storage cavity through a connecting pipe, an exhaust pipe is fixedly connected to the right end of the oil-gas separator, the exhaust end of the exhaust pipe penetrates through the inner top wall of the liquid storage tank and extends to the outside, the output end of the liquid pump is communicated with a liquid discharge pipe, and the output end of the liquid discharge pipe is communicated with the oil-gas separator.

As a preferred technical scheme of the utility model, DNAPL collection device includes wall pipe and oblique baffle, the top of wall pipe and the bottom fixed connection of the screen pipe that permeates water, baffle fixed mounting makes it be the closure form to one side in the bottom of wall pipe, the inside top fixed mounting of wall pipe has the level gauge, the tip department fixed mounting of oblique baffle has the liquid suction pipe, the input and the inside being linked together of wall pipe of liquid suction pipe, the output of liquid suction pipe runs through the soil horizon and is linked together with the drawing liquid pump.

As an optimal technical scheme of the utility model, the lateral wall fixed mounting of liquid storage pot has the supporting leg, and the supporting leg is provided with four altogether, four supporting leg evenly distributed is around the liquid storage pot.

As a preferred technical scheme of the utility model, the leakage fluid dram has been seted up to the bottom of liquid storage pot, the bottom threaded connection of leakage fluid dram has sealed lid.

As an optimal technical scheme of the utility model, the inside fixed mounting of liquid storage pot has level sensor, the fixed surface of liquid storage pot installs liquid level display, liquid level display is electric connection with level sensor.

As an optimal technical scheme of the utility model, the positive surface mounting of liquid storage pot has the start button, oil and gas separator, liquid level display and level sensor all with start button electric connection.

As an optimal technical scheme of the utility model, the lateral wall fixed mounting of the screen pipe that permeates water has the mounting panel, the screen pipe that permeates water passes through the mounting panel and is fixed with the interior wall of extraction well.

Compared with the prior art, the utility model discloses the beneficial effect that can reach is:

1. through the inclined baffle that the wall pipe bottom set up, can block because of the too big DNAPL that sinks in the wall pipe of density, make its gathering inside the wall pipe, after DNAPL gathers full, take out alone to it again and can avoid blockking up pumping equipment, reduce the loss and the maintenance frequency of equipment, the setting of this structure has increased the function of getting rid of DNAPL to shorten the restoration cycle in the high concentration volatility organic field pollution place that contains DNAPL.

2. The oil-gas separator arranged in the liquid storage tank can separate the free phase from the water phase, so that the increase of the concentration of pollutants in the water phase after the oil and the water are mixed is avoided, and the subsequent treatment difficulty is reduced.

Drawings

FIG. 1 is a perspective view of the liquid storage tank of the present invention;

fig. 2 is a front sectional view of the present invention;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2 according to the present invention;

fig. 4 is a perspective view of the water permeable sieve tube of the present invention.

Wherein: 1. a soil layer; 2. an extraction well; 3. a water permeable sieve tube; 4. a DNAPL collection device; 5. a wall pipe; 6. an inclined baffle plate; 7. a liquid pump; 8. a liquid storage tank; 9. a liquid level meter; 10. a liquid pumping pipe; 11. an oil-gas separator; 12. a connecting pipe; 13. an exhaust pipe; 14. a liquid discharge pipe; 15. supporting legs; 16. a liquid discharge port; 17. a sealing cover; 18. a liquid level sensor; 19. a liquid level display; 20. a start button; 21. and (7) mounting the plate.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the functions of the invention easy to understand, the invention is further explained below with reference to the specific embodiments, but the following embodiments are only the preferred embodiments of the invention, not all. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents and the like used in the following examples are commercially available unless otherwise specified.

Example (b):

as shown in fig. 1-4, an in-situ multiphase extraction DNAPL separation and remediation device for a contaminated site comprises a soil layer 1, wherein an extraction well 2 is fixedly installed inside the soil layer 1, a water permeable sieve tube 3 is fixedly installed at the lower end of the inner wall of the extraction well 2, a DNAPL collection device 4 is fixedly connected to the bottom end of the water permeable sieve tube 3, a liquid suction pump 7 and a liquid storage tank 8 are arranged on the upper surface of the soil layer 1, a liquid storage cavity is formed inside the liquid storage tank 8, an oil-gas separator 11 is fixedly installed at the top end inside the liquid storage tank 8, the bottom end of the oil-gas separator 11 is communicated with the liquid storage cavity through a connecting pipe 12, an exhaust pipe 13 is fixedly connected to the right end of the oil-gas separator 11, an exhaust end of the exhaust pipe 13 penetrates through the inner top wall of the liquid storage tank 8 and extends to the outside, an output end of the liquid suction pump 7 is communicated with a liquid discharge pipe 14, and an output end of the liquid discharge pipe 14 is communicated with the oil-gas separator 11;

when DNAPL enters the liquid storage tank 8 through the liquid discharge pipe 14, firstly, liquid flows into the oil-gas separator 11, the free phase and the water phase can be pumped and separated through the oil-gas separator 11, the increase of the concentration of pollutants in the water phase after oil-water mixing can be avoided, the subsequent processing difficulty is reduced, the separated gas is discharged to the outside of the liquid storage tank 8 through the arranged exhaust pipe 13, and the liquid is discharged into the liquid storage cavity for storage through the arranged connecting pipe 12.

In other embodiments, the DNAPL collection device 4 comprises a wall tube 5 and an inclined baffle 6, the top end of the wall tube 5 is fixedly connected with the bottom end of the water-permeable screen tube 3, the inclined baffle 6 is fixedly installed at the bottom of the wall tube 5 to be closed, a liquid level meter 9 is fixedly installed above the inside of the wall tube 5, an extraction tube 10 is fixedly installed at the tip end of the inclined baffle 6, the input end of the extraction tube 10 is communicated with the inside of the wall tube 5, and the output end of the extraction tube 10 penetrates through the soil layer 1 and is communicated with an extraction pump 7;

when the well pipe is used for pumping a water source in the extraction well 2, a small part of DNAPL can be pumped out by the well pipe along with underground water flow, most of DNAPL can sink into the wall pipe 5 at the bottom of the well under the action of gravity due to high density, the DNAPL can be gathered in the wall pipe through the arranged inclined baffle 6, when the liquid level meter 9 shows that the DNAPL is fully gathered, the liquid pumping pump 7 is started, the DNAPL can be pumped out through the arranged liquid pumping pipe 10 and the arranged liquid discharging pipe 14 and is discharged into the liquid storage tank 8, and the DNAPL can be pumped out independently through the arrangement of the structure, so that the blockage of water pumping equipment is avoided, and the loss and the maintenance frequency of the equipment are reduced.

In other embodiments, the outer side wall of the liquid storage tank 8 is fixedly provided with four supporting legs 15, and the four supporting legs 15 are uniformly distributed around the liquid storage tank 8; the supporting legs 15 can support and fix the liquid storage tank 8.

In other embodiments, the bottom end of the liquid storage tank 8 is provided with a liquid outlet 16, and the bottom end of the liquid outlet 16 is in threaded connection with a sealing cover 17; through the lid handle of installation on the sealed lid 17, can make things convenient for the staff to open sealed lid 17, then the inside liquid of liquid storage pot 8 just can be followed leakage fluid dram 16 and discharged, makes things convenient for the staff to collect.

In other embodiments, a liquid level sensor 18 is fixedly installed inside the liquid storage tank 8, a liquid level display 19 is fixedly installed on the outer surface of the liquid storage tank 8, and the liquid level display 19 is electrically connected with the liquid level sensor 18; through the level sensor 18 who sets up, can give liquid level display 19 with the inside liquid water level data transmission of liquid storage pot 8 to show inside liquid water level data through liquid level display 19, supply the staff to refer to, the staff of being convenient for knows the inside liquid water level condition.

In other embodiments, the front surface of the liquid storage tank 8 is provided with a starting button 20, and the oil-gas separator 11, the liquid level display 19 and the liquid level sensor 18 are all electrically connected with the starting button 20; the starting button 20 is started, so that the machine can work, the operation is simple and convenient, and the practicability is high.

In other embodiments, the outer side wall of the water-permeable screen pipe 3 is fixedly provided with a mounting plate 21, and the water-permeable screen pipe 3 is fixed with the inner wall of the extraction well 2 through the mounting plate 21; through the mounting panel 21 that sets up, make the screen pipe 3 that permeates water can be better fix in the inside of extraction well 2, prevent that the screen pipe 3 that permeates water from taking place to drop, influence subsequent use.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An in-situ multiphase extraction DNAPL separation and repair device for a polluted site comprises a soil layer (1) and is characterized in that: an extraction well (2) is fixedly arranged in the soil layer (1), a water permeable sieve tube (3) is fixedly arranged at the lower end of the inner wall of the extraction well (2), the bottom end of the water permeable sieve tube (3) is fixedly connected with a DNAPL collecting device (4), the upper surface of the soil layer (1) is provided with a liquid pump (7) and a liquid storage tank (8), a liquid storage cavity is arranged inside the liquid storage tank (8), an oil-gas separator (11) is fixedly arranged at the top end inside the liquid storage tank (8), the bottom end of the oil-gas separator (11) is communicated with the liquid storage cavity through a connecting pipe (12), the right end of the oil-gas separator (11) is fixedly connected with an exhaust pipe (13), the exhaust end of the exhaust pipe (13) penetrates through the inner top wall of the liquid storage tank (8) and extends to the outside, the output end of the liquid pump (7) is communicated with a liquid discharge pipe (14), and the output end of the liquid discharge pipe (14) is communicated with the oil-gas separator (11).

2. The device for separating and repairing in-situ multiphase extracted DNAPL of the polluted site as claimed in claim 1, wherein: the DNAPL collecting device (4) comprises a wall pipe (5) and an inclined baffle (6), the top end of the wall pipe (5) is fixedly connected with the bottom end of a water permeable sieve pipe (3), the inclined baffle (6) is fixedly installed at the bottom of the wall pipe (5) to be in a closed state, a liquid level meter (9) is fixedly installed above the inner portion of the wall pipe (5), a liquid pumping pipe (10) is fixedly installed at the tip end of the inclined baffle (6), the input end of the liquid pumping pipe (10) is communicated with the inner portion of the wall pipe (5), and the output end of the liquid pumping pipe (10) penetrates through a soil layer (1) and is communicated with a liquid pumping pump (7).

3. The device for separating and repairing in-situ multiphase extracted DNAPL of the polluted site as claimed in claim 1, wherein: supporting legs (15) are fixedly mounted on the outer side wall of the liquid storage tank (8), and four supporting legs (15) are arranged, wherein the four supporting legs (15) are uniformly distributed around the liquid storage tank (8).

4. The device for separating and repairing in-situ multiphase extracted DNAPL of the polluted site as claimed in claim 1, wherein: a liquid outlet (16) is formed in the bottom end of the liquid storage tank (8), and a sealing cover (17) is connected to the bottom end of the liquid outlet (16) in a threaded manner.

5. The device for separating and repairing in-situ multiphase extracted DNAPL of the polluted site as claimed in claim 1, wherein: the liquid level meter is characterized in that a liquid level sensor (18) is fixedly mounted inside the liquid storage tank (8), a liquid level display (19) is fixedly mounted on the outer surface of the liquid storage tank (8), and the liquid level display (19) is electrically connected with the liquid level sensor (18).

6. The device for separating and repairing in-situ multiphase extracted DNAPL in a polluted site as claimed in claim 5, wherein: the front surface of the liquid storage tank (8) is provided with a starting button (20), and the oil-gas separator (11), the liquid level display (19) and the liquid level sensor (18) are all electrically connected with the starting button (20).

7. The device for separating and repairing in-situ multiphase extracted DNAPL of the polluted site as claimed in claim 1, wherein: the outer side wall of the water-permeable sieve tube (3) is fixedly provided with a mounting plate (21), and the water-permeable sieve tube (3) is fixed with the inner wall of the extraction well (2) through the mounting plate (21).