CN219401650U

CN219401650U - Soil layer structure for restoring polluted soil

Info

Publication number: CN219401650U
Application number: CN202223321185.5U
Authority: CN
Inventors: 余冰; 钱学斌
Original assignee: Zhejiang Haocheng Construction Co ltd
Current assignee: Zhejiang Haocheng Construction Co ltd
Priority date: 2022-12-10
Filing date: 2022-12-10
Publication date: 2023-07-25
Anticipated expiration: 2032-12-10

Abstract

The utility model discloses a soil layer structure for repairing polluted soil, which relates to the technical field of soil repair and has the technical scheme that the soil layer structure comprises a bedrock and a soil body from bottom to top, wherein the soil body is provided with a matrix layer, a deposition layer and a leaching layer from bottom to top; the reagent adding structure comprises a nutrient tank arranged on the upper side of the soil body, a plurality of droppers connected to the leaching layer, and a conveying pipe connected with the droppers and the nutrient tank; the device also comprises an oxygen supply structure, wherein the oxygen supply structure comprises a wind source arranged on the upper side of the soil body, a plurality of gas pipes connected to the matrix layer, the deposition layer and the leaching layer, and a pipeline connected with the gas pipes and the wind source; an organic layer is arranged on the upper side of the soil body. The method has the technical effects of relatively simple process, convenient installation, low cost, no need of operation of soil turning equipment, repair in 6-24 months, good combination of various treatment processes and no conflict.

Description

Soil layer structure for restoring polluted soil

Technical Field

The utility model relates to the technical field of soil remediation, in particular to a soil layer structure for remediating polluted soil.

Background

At present, in the prior art, more published patents are combined with mechanical equipment to break soil, turn soil and backfill soil in the process of treating soil pollution. In the process, chemical reagent is added for restoration, the engineering amount of the process is relatively large, and in some soil restoration processes, the time sequence between the steps is before, after and long, so that the equipment needs to be in a construction field for a long time, the mechanical soil breaking restoration time is long, and the engineering cost is relatively high.

Disclosure of Invention

The utility model aims to provide a soil layer structure for repairing polluted soil, which has the advantages of combination of various repairing means, first repairing cost and wide technical applicability.

The technical aim of the utility model is realized by the following technical scheme:

the soil layer structure for repairing the polluted soil comprises a bedrock and a soil body from bottom to top, wherein the soil body is provided with a matrix layer, a deposition layer and an leaching layer from bottom to top;

the reagent adding structure comprises a nutrient tank arranged on the upper side of the soil body, a plurality of droppers connected to the leaching layer, and a conveying pipe connected with the droppers and the nutrient tank;

the device also comprises an oxygen supply structure, wherein the oxygen supply structure comprises a wind source arranged on the upper side of the soil body, a plurality of gas pipes connected to the matrix layer, the deposition layer and the leaching layer, and a pipeline connected with the gas pipes and the wind source;

an organic layer is arranged on the upper side of the soil body.

Further set up: the gas pipe comprises a gas phase section positioned on the leaching layer, an adsorption phase section positioned on the deposition layer and a release phase section positioned on the matrix layer.

Further set up: the gas transmission pipe comprises an inner sleeve and an outer sleeve, the outer sleeve is provided with a plurality of first air holes which are respectively communicated with the matrix layer, the deposition layer and the leaching layer, the inner sleeve is provided with a plurality of second air holes which correspond to the first air holes, and the second air holes are communicated with the first air holes according to the rotation of the inner sleeve.

Further set up: the top of the inner sleeve is provided with a supporting part, and the outer ring of the supporting part is provided with a protruding block.

Further set up: the side wall of inner skleeve and bottom is equipped with first water outlet, and first water outlet is located on a non-straight line with first gas port, the inner skleeve is equipped with the second water outlet that corresponds with first water outlet, and second water outlet is according to the first gas port of inner skleeve rotation intercommunication.

Further set up: a heating device is arranged in the wind source or at the pipeline.

Further set up: the air delivery pipe is vertically arranged, and the dropper is transversely arranged.

Further set up: the organic matter layer is provided with a vegetation layer and an artificial humic acid layer.

In summary, the utility model has the following beneficial effects:

first, the specific soil layer structure is treated, so that the specific treatment process is ensured to be positioned in the specific soil layer structure, and a proper treatment result is achieved.

Secondly, in the treatment, nutrient solution can be added in the nutrient tank, chemical treatment additives can be added, corresponding needed nutrition and needed repairing agent for targeted treatment are supplemented for the soil, ventilation treatment is combined, aerobic microorganism degradation pollutants are promoted at the ventilation and oxygen supply position in the polluted soil, and biological repair and chemical repair are combined and overlapped, so that the treatment effect is better.

Thirdly, the process is relatively simple, the installation is convenient, the cost is low, the operation of soil turning equipment is not needed, the repair is carried out within 6-24 months, the combination of various treatment processes is good, and no conflict exists.

Fourth, in the process of supplying oxygen to the soil, the gas which can be conveyed inwards is heated, and on the basis of restoration, the auxiliary heat treatment is added to perform partial disinsection, so that the volatility of SVOCs is improved.

Drawings

Fig. 1 is a schematic view of a soil layer structure of soil;

FIG. 2 is a schematic view of a soil layer structure for restoring contaminated soil;

FIG. 3 is a schematic view of the structure of a gas delivery pipe.

In the figure, 100, bedrock; 101. a matrix layer; 102. depositing a layer; 103. a leaching layer; 104. an organic layer;

200. a reagent addition structure; 201. a feed tank; 202. a dropper; 203. a delivery tube;

300. an oxygen supply structure; 301. a wind source; 302. a pipe; 303. a heating device;

400. a gas pipe; 401. a gas phase section; 402. an adsorption phase section; 403. releasing the phase section; 404. an outer sleeve; 405. an inner sleeve; 406. a first air hole; 407. a second air hole; 408. a first water discharge port; 409. a second water discharge port; 410. a support section; 411. and a bump.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings.

First preferred embodiment:

the soil layer structure for restoring the polluted soil comprises a bedrock 100 from bottom to top and a soil body, wherein the soil body is provided with a matrix layer 101, a sediment layer 102 and a leaching layer 103 from bottom to top. An organic layer 104 is arranged on the upper side of the soil body. The organic layer 104 has a vegetation layer and an artificial humic acid layer. The artificial humic acid layer can be a fertilizer or can be humic acid plants which can be generated after the decay of straw and the like. The vegetation layer may be turf.

As shown in fig. 2, the reagent adding structure 200 is further included, and the reagent adding structure 200 includes a nutrient tank 201, a plurality of drip pipes 202, and a transport pipe 203 connecting the drip pipes 202 and the nutrient tank 201. The number of the droppers 202 can be one or more, the number of the nutrient tanks 201 can be one or more, and the number of the conveying pipes 203 can be one or more, which is determined according to the dosage of the areas. The nutrient tanks 201 are all arranged on the upper side of the soil body. The drip tube 202 is arranged laterally and within the leaching layer 103, and the delivery tube 203 is connected to the drip tube 202 within the leaching layer 103 in part and to drip irrigation in another part.

As shown in fig. 2, the oxygen supply structure 300 is further included, and the oxygen supply structure 300 includes a wind source 301 provided at the upper side of the soil body, a plurality of gas pipes 400 connected to the matrix layer 101, the deposition layer 102, the leaching layer 103, and a pipeline 302 connecting the gas pipes 400 and the wind source 301. Heating devices 303 are arranged in the wind source 301 or at the gas delivery pipe 400, and the heating devices 303 are mainly devices capable of heating gas, such as a steam generating device and an electric heating device 303.

The air source 301 is used for ventilation and oxygenation to the inside of the soil, and the ventilation and oxygen supply positions in the polluted soil promote aerobic microorganisms to degrade pollutants, so that the soil polluted by solvents, the soil polluted by pesticides, the soil polluted by wood preservatives or other chemical pollution can be treated. According to the requirement, the oxygen-enriched air can be heated, so that the volatility of SVOCs is further improved.

As shown in fig. 2 and 3, the gas pipe 400 is vertically arranged to facilitate construction of a borehole. The gas line 400 includes a gas phase section 401 located in the leaching layer 103, an adsorption phase section 402 located in the deposition layer 102, and a de-phase section 403 located in the matrix layer 101. Several segments are the mechanical changes in morphology during oxygenation and are not structural changes to the gas line 400. For the structure of the gas delivery pipe 400, the gas delivery pipe comprises an inner sleeve 405 and an outer sleeve 404, the outer sleeve 404 is provided with a plurality of first air holes 406 which are respectively communicated with the matrix layer 101, the deposition layer 102 and the leaching layer 103, the inner sleeve 405 is provided with a plurality of second air holes 407 corresponding to the first air holes 406, and the second air holes 407 are communicated with the first air holes 406 in a autorotation manner according to the inner sleeve 405. The side wall of inner sleeve 405 and bottom is equipped with first water outlet 408, and first water outlet 408 is located non-collinear with first air vent 406, and inner sleeve 405 is equipped with the second water outlet 409 that corresponds with first water outlet 408, and second water outlet 409 is according to inner sleeve 405 rotation intercommunication first air vent 406. The top of the inner sleeve 405 is provided with a supporting portion 410, and the outer ring of the supporting portion 410 is provided with a protruding block 411. The wrench is sleeved on the supporting part 410, and is limited by the wrench and the protruding block 411, and the protruding block 411 drives the inner sleeve 405 to rotate, so that two states are changed. When the ventilation is needed, the first air vent 406 and the second air vent 407 are rotated to be in communication with each other, and the first water drain 408 and the second water drain 409 are not in communication with each other. When installed, a piece of cloth may be placed over the air conduit 400 and the surface silt may flow back into the inner sleeve 405. Geotechnical cloth prevents a part of moisture from entering the inner sleeve 405, so that when ventilation is not needed, the inner sleeve 405 is rotated, the first air hole 406 and the second air hole 407 are misplaced, the first water drain hole 408 and the second water drain hole 409 are communicated, and the inner sleeve 405 is slowly oozed out downwards through gravity.

Through the above technical scheme, the organic matter layer 104 is arranged on the upper side of the leaching layer 103, and the organic matter accumulation of the soil layer structure is artificially increased to decompose minerals, so that the rotten plant roots and branches and animal remains form a mixture of humic substances and mineral substances which are not easy to dissolve. The gas line 400 provides a more rapid decomposition process at this portion of the oxygenation.

In the lower part of the leaching layer 103 there is usually a layer of magnesium, iron, calcium etc. ions decomposed from minerals, and minerals and plasma dissolved by the leaching layer 103 are all precipitated in this layer, so that the substances of iron oxide, aluminum and clay are deposited in a relatively rich way, and most of metal ions in the leaching layer 103 move downwards to the deposition layer 102 along with groundwater containing organic acid, and the gas pipe 400 forms an adsorption phase in this part to remove heavy metal pollutants in soil.

In the dephasing section 403 of the matrix layer 101, the matrix layer 101 is located deeper and further distal to the gas line 400. Can produce an effect, but the oxygenation effect and the filtration effect are relatively weak. And is therefore referred to as the cancel phase section 403.

The above-described embodiments are provided for illustration only and not for limitation of the present utility model, and modifications may be made to the embodiments without creative contribution by those skilled in the art after reading the present specification, as long as they are protected by patent laws within the scope of claims of the present utility model.

Claims

1. The soil layer structure for repairing the polluted soil is characterized by comprising a bedrock (100) from bottom to top and a soil body, wherein the soil body is provided with a matrix layer (101), a deposition layer (102) and a leaching layer (103) from bottom to top;

the device further comprises a reagent adding structure (200), wherein the reagent adding structure (200) comprises an nutrient tank (201) arranged on the upper side of a soil body, a plurality of drip tubes (202) connected into the leaching layer (103), and a conveying pipe (203) connected with the drip tubes (202) and the nutrient tank (201);

the device also comprises an oxygen supply structure (300), wherein the oxygen supply structure (300) comprises a wind source (301) arranged on the upper side of the soil body, a plurality of gas pipes (400) connected to the matrix layer (101), the deposition layer (102) and the leaching layer (103), and a pipeline (302) connected with the gas pipes (400) and the wind source (301);

an organic matter layer (104) is arranged on the upper side of the soil body.

2. A soil layer structure for restoring contaminated soil according to claim 1, wherein: the gas pipe (400) comprises a gas phase section (401) positioned on the leaching layer (103), an adsorption phase section (402) positioned on the deposition layer (102) and a release phase section (403) positioned on the matrix layer (101).

3. A soil layer structure for repairing contaminated soil according to claim 2, wherein: the gas delivery pipe (400) comprises an inner sleeve (405) and an outer sleeve (404), the outer sleeve (404) is provided with a plurality of first air holes (406) which are respectively communicated with the matrix layer (101), the deposition layer (102) and the leaching layer (103), the inner sleeve (405) is provided with a plurality of second air holes (407) which correspond to the first air holes (406), and the second air holes (407) are communicated with the first air holes (406) in a self-rotating mode according to the inner sleeve (405).

4. A soil layer structure for restoring contaminated soil according to claim 3, wherein: the top of the inner sleeve (405) is provided with a supporting part (410), and the outer ring of the supporting part (410) is provided with a protruding block (411).

5. A soil layer structure for restoring contaminated soil according to claim 3, wherein: the side wall of inner skleeve (405) and bottom is equipped with first water outlet (408), and first water outlet (408) are located non-collinear with first gas port (406), inner skleeve (405) are equipped with second water outlet (409) that correspond with first water outlet (408), and second water outlet (409) are according to inner skleeve (405) rotation intercommunication first gas port (406).

6. A soil layer structure for restoring contaminated soil according to claim 1, wherein: a heating device (303) is arranged in the wind source (301) or at the pipeline (302).

7. A soil layer structure for restoring contaminated soil according to claim 1, wherein: the air delivery pipe (400) is vertically arranged, and the dropper (202) is transversely arranged.

8. A soil layer structure for restoring contaminated soil according to claim 1, wherein: the organic matter layer (104) is provided with a vegetation layer and an artificial humic acid layer.