CN215143337U - Electric heat conduction in-situ thermal desorption repair system for contaminated soil - Google Patents
Electric heat conduction in-situ thermal desorption repair system for contaminated soil Download PDFInfo
- Publication number
- CN215143337U CN215143337U CN202121324112.4U CN202121324112U CN215143337U CN 215143337 U CN215143337 U CN 215143337U CN 202121324112 U CN202121324112 U CN 202121324112U CN 215143337 U CN215143337 U CN 215143337U
- Authority
- CN
- China
- Prior art keywords
- layer
- shaped heating
- heat conduction
- heating pipe
- thermal desorption
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a be used for polluting soil electric heat conduction normal position thermal desorption repair system, include: the U-shaped heating assembly comprises a U-shaped heating pipe connected with an external power distribution system, a heating sleeve arranged outside the U-shaped heating pipe and a high-temperature heat conducting medium, and is used for realizing uniform heat conduction in the U-shaped heating pipe and enlarging the heat conduction range, and the U-shaped heating pipe and the heating sleeve form an integrated structure through a plurality of connecting pieces; the ground barrier layer comprises an HDPE film layer, a sandstone layer, a light insulating brick layer and a concrete layer which are sequentially arranged from bottom to top. The utility model provides a "U" type heating element increases underground contaminated soil and thermal area of contact and thermal conduction scope for soil temperature's even rising has improved heat conduction efficiency, and the ground barrier layer can reduce the meaningless of heat energy and give off, avoids the unorganized loss of gasification pollutant.
Description
Technical Field
The utility model relates to a soil remediation field especially relates to a be used for polluting soil electric heat conduction normal position thermal desorption repair system.
Background
In recent years, the research on the polluted soil treatment technology is gradually emphasized all over the country, wherein the polluted soil thermal desorption technology has the advantages of wide range, short restoration period, good restoration effect, low secondary pollution and the like, and has great advantages and application prospects in the field of restoring low-permeability soil, deeper pollution depth and serious organic matter pollution, and is receiving more and more attention and research.
At present, the in-situ thermal desorption technology is mainly divided into two forms of fuel combustion heating and electric heat conduction according to energy use, wherein the electric heat conduction in-situ thermal desorption restoration technology is to insert a heating resistance wire or a heating pipe into soil to form a high-temperature heat source, and transfer heat to surrounding soil through heat conduction and heat radiation to raise the temperature of the soil in a field so as to promote volatilization or decomposition of pollutants.
The electric heat conduction thermal desorption technology can heat up the soil to 500-800 ℃, but because of radiation heat conduction, the heating effect to the area near the heating well is better, the heating speed to the soil far away is slower, the heating effect is not good, a large amount of heat energy loss is easily caused, and in the in-situ repair process, along with the temperature rise, the junction of the electric heat conduction technology separation system and the heating pipe is suitable for generating gaps due to expansion and contraction, the gasified pollutants are easy to cause secondary pollution due to unorganized loss.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides a be used for polluting soil electric heat conduction normal position thermal desorption repair system, through changing original heat source separation system processing mode, optimizes heating pipe inner structure simultaneously, reaches the reduction energy loss, effectively avoids pollutant inorganization loss to cause secondary pollution.
In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a be used for contaminated soil electric heat conduction normal position thermal desorption repair system, includes: the U-shaped heating assembly is configured to comprise a U-shaped heating pipe connected with an external power distribution system, a heating sleeve arranged outside the U-shaped heating pipe and a high-temperature heat-conducting medium filled between the U-shaped heating pipe and the heating sleeve, and is used for realizing uniform heat conduction in the U-shaped heating pipe, increasing the heat conduction range and ensuring that the temperature of soil far away from the U-shaped heating pipe quickly and uniformly rises;
the ground barrier layer is configured as an HDPE film layer, a sandstone layer, a light insulating brick layer and a concrete layer which are arranged from bottom to top in sequence,
wherein the HDPE film is used for isolating polluted steam and other gasified pollutants;
the sand-stone layer is used for improving the bearing capacity of the shallow foundation layer and reducing the settlement of the shallow foundation layer;
the light insulating brick layer is used for reducing the loss of electrode heating energy and reducing energy loss;
the concrete layer is used for improving the water stability and frost heaving resistance of the ground barrier layer and can diffuse load so as to reduce deformation and cracking of the barrier layer;
a connector configured to integrate the "U" shaped heating tube with the heating sleeve connector into a unitary structure.
In a preferred embodiment of the present invention, the connecting member is a buckle, and a plurality of the buckles are distributed on the inner wall of the heating sleeve.
In a preferred embodiment of the present invention, the U-shaped heating pipe and the heating sleeve are made of stainless steel.
In a preferred embodiment of the present invention, the diameter of the heating sleeve is 1.5-3 times of the diameter of the U-shaped heating tube.
In a preferred embodiment of the present invention, the high temperature heat-conducting medium is magnesium oxide particles.
In a preferred embodiment of the present invention, the HDPE film is laid to a thickness of 1-2mm, the sand layer fills the gap between the light insulating brick layer and the HDPE film, the light insulating brick layer is laid to a thickness of 10-12cm, the concrete layer is C20 concrete layer, and the laying thickness is 10-12 cm.
The utility model has the advantages that: the utility model discloses a pollute soil electric heat conduction normal position thermal desorption repair system adopts "U" type + sleeve pipe structure and fills high temperature heat-conducting medium magnesium oxide granule, can accelerate the heat uniform conduction in the heating tube, increases the area of contact of underground contaminated soil and heat and thermal conduction scope, has accelerated the soil temperature that is far away from the heating tube and has evenly risen, has improved heat conduction efficiency, has reduced the meaningless diffusion of heat energy; the ground barrier layer changes the disposal mode of the original heat source barrier system, simultaneously optimizes the internal structure of the heating pipe, reduces energy loss, effectively avoids secondary pollution caused by the unorganized dissipation of pollutants, has a wide application range, is convenient to control the repair cost, improves the repair efficiency and reduces energy consumption.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:
fig. 1 is a schematic structural diagram of the utility model relates to a thermal desorption repair system for contaminated soil electrothermal conduction normal position.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a system for repairing contaminated soil by electric heat conduction and in-situ thermal desorption, including: the heating device comprises a U-shaped heating assembly arranged in a heating well 10 in a pollution site and a ground blocking layer arranged above the heating well, wherein the U-shaped heating assembly comprises a U-shaped heating pipe 2 connected with an external power distribution system 1, a heating sleeve 3 arranged outside the U-shaped heating pipe and a high-temperature heat-conducting medium 4 filled between the U-shaped heating pipe and the heating sleeve and used for realizing uniform heat conduction in the U-shaped heating pipe, increasing the heat conduction range and ensuring that the temperature of soil far away from the U-shaped heating pipe rapidly and uniformly rises, the U-shaped heating pipe and the heating sleeve form an integral structure through a plurality of connecting pieces 5, the connecting pieces are buckles, the buckles are distributed on the inner side pipe wall of the heating sleeve, in the specific embodiment, fixed U-shaped buckles are arranged at every 50cm of the pipe walls on the two sides in the sleeve, and the material of the U-shaped buckles is the same as that of the heating sleeve, the U-shaped buckle is used as a connecting component between the U-shaped heating pipe and the heating sleeve pipe, and plays a role in fixing.
The high-temperature heat-conducting medium is magnesium oxide particles which are arranged in the gap between the heating sleeve and the diameter of the U-shaped heating pipe, so that the heat-conducting efficiency is improved, and the U-shaped heating pipe can be protected to a certain extent.
The U-shaped heating pipe and the heating sleeve are both made of stainless steel pipes, and the pipe diameter of the heating sleeve is 1.5-3 times of that of the U-shaped heating pipe.
Specifically, a ground barrier layer is arranged on an original soil layer on the upper side of the heating well and used for plugging the heating well and other accessory device systems and reducing heat loss and unorganized dissipation of gasified pollutants, the ground barrier layer comprises an HDPE film layer 6, a sand stone layer 7, a light insulating brick layer 8 and a concrete layer 9 which are sequentially arranged from bottom to top, the HDPE film is laid to be 1-2mm thick, the sand stone layer is filled in a gap between the light insulating brick layer and the HDPE film, the light insulating brick layer is laid to be 10-12cm thick, the concrete layer is a C20 concrete layer and is laid to be 10-12cm thick, the HDPE film is arranged on the ground barrier layer and used for isolating polluted steam and other gasified pollutants, the sand stone layer is used for improving the bearing capacity of a shallow foundation layer and reducing the settlement of the shallow foundation layer, and the light insulating brick layer is used for reducing the loss of electrode heating energy, the concrete layer is used for improving the water stability and frost heaving resistance of the ground barrier layer and can diffuse load so as to reduce deformation and cracking of the barrier layer.
In the heating process in the heating tube, the temperature of the surface barrier layer can also rise, and then the energy is released to the air, so that the energy loss is caused, when the light insulating brick is added into the barrier layer, the heat conductivity coefficient of the ground barrier layer is reduced, and the energy loss is effectively reduced.
To sum up, the utility model discloses a be used for polluting soil electric heat conduction normal position thermal desorption repair system has following beneficial effect:
(1) in the aspect of temperature rising efficiency, the heating pipe is different from the existing straight pipe type in-situ thermal desorption heating pipe structure, has a U-shaped sleeve structure and is filled with high-temperature heat-conducting medium magnesium oxide particles, can accelerate the uniform heat conduction in the heating pipe, increases the contact area of the underground polluted soil and the heat conduction range, accelerates the uniform temperature rise of the soil far away from the heating pipe, improves the heat conduction efficiency, and reduces the meaningless heat emission of heat energy;
(2) in structural form, the heat pipe is different from the existing straight pipe type in-situ heat removal additional heat pipe structure, a U-shaped structure and a sleeve pipe structure are structurally arranged, the U-shaped structure can enable high temperature heating to be uniform, the sleeve pipe structure can protect a heating pipe, the heat conduction range is enlarged through pipe walls on two sides of the sleeve pipe, and the heat conduction efficiency is improved;
(3) in the aspect of secondary pollution prevention and cure, the utility model discloses ground barrier layer adopts the multilayer structure form, and the light insulating brick is united to the HDPE membrane, is different from the surface separation system that adopts the HDPE membrane to lay, the effectual heating tube heat that has reduced gives off, and lays the concrete in the barrier layer and fills the sandstone layer, more effectual stability and the anti rupture ability that has improved the barrier layer, avoids the unorganized loss of gasification pollutant.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, all included in the same way in the patent protection scope of the present invention.
Claims (6)
1. The utility model provides a be used for polluting soil electric heat conduction normal position thermal desorption repair system which characterized in that includes:
the U-shaped heating assembly is configured to comprise a U-shaped heating pipe connected with an external power distribution system, a heating sleeve arranged outside the U-shaped heating pipe and a high-temperature heat-conducting medium filled between the U-shaped heating pipe and the heating sleeve, and is used for realizing uniform heat conduction in the U-shaped heating pipe, increasing the heat conduction range and ensuring that the temperature of soil far away from the U-shaped heating pipe quickly and uniformly rises;
the ground barrier layer is configured as an HDPE film layer, a sandstone layer, a light insulating brick layer and a concrete layer which are arranged from bottom to top in sequence,
wherein the HDPE film is used for isolating polluted steam and other gasified pollutants;
the sand-stone layer is used for improving the bearing capacity of the shallow foundation layer and reducing the settlement of the shallow foundation layer;
the light insulating brick layer is used for reducing the loss of electrode heating energy and reducing energy loss;
the concrete layer is used for improving the water stability and frost heaving resistance of the ground barrier layer and can diffuse load so as to reduce deformation and cracking of the barrier layer;
a connector configured to integrate the "U" shaped heating tube with the heating sleeve connector into a unitary structure.
2. The in-situ thermal desorption remediation system for contaminated soil by electrothermal conduction of claim 1, wherein the connecting member is a buckle, and a plurality of buckles are distributed on the inner wall of the heating casing.
3. The in-situ thermal desorption remediation system for contaminated soil by electrothermal conduction according to claim 1, wherein the U-shaped heating pipe and the heating sleeve are made of stainless steel pipes.
4. The in-situ thermal desorption remediation system for contaminated soil by electrothermal conduction according to claim 1, wherein the pipe diameter of the heating sleeve is 1.5-3 times that of the U-shaped heating pipe.
5. The in-situ thermal desorption remediation system for contaminated soil by electrothermal conduction of claim 1, wherein the high temperature heat-conducting medium is magnesium oxide particles.
6. The in-situ thermal desorption remediation system for contaminated soil through electric heat conduction as claimed in claim 1, wherein the HDPE film is laid to a thickness of 1-2mm, the sand layer is filled in a gap between the light insulating brick layer and the HDPE film, the light insulating brick layer is laid to a thickness of 10-12cm, the concrete layer is a C20 concrete layer, and the laying thickness is 10-12 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121324112.4U CN215143337U (en) | 2021-06-15 | 2021-06-15 | Electric heat conduction in-situ thermal desorption repair system for contaminated soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121324112.4U CN215143337U (en) | 2021-06-15 | 2021-06-15 | Electric heat conduction in-situ thermal desorption repair system for contaminated soil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215143337U true CN215143337U (en) | 2021-12-14 |
Family
ID=79385829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121324112.4U Active CN215143337U (en) | 2021-06-15 | 2021-06-15 | Electric heat conduction in-situ thermal desorption repair system for contaminated soil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215143337U (en) |
-
2021
- 2021-06-15 CN CN202121324112.4U patent/CN215143337U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1884694A (en) | Heat-conductive asphalt road surface solar energy heat-collecting system and its uses | |
| CN105234166B (en) | A kind of system of solar energy home position strengthening gas phase extracting rehabilitating soil organic pollution | |
| CN111250523B (en) | Gas thermal desorption heating well with longitudinal soil heated uniformly | |
| CN215143337U (en) | Electric heat conduction in-situ thermal desorption repair system for contaminated soil | |
| CN210497636U (en) | Heating well system for in-situ soil thermal desorption | |
| CN205561615U (en) | Ground depth of origin well energy storage exchange system land used buries heat exchange tube | |
| CN104358962A (en) | Solar photovoltaic thermal/electric heat tracing system for permafrost-buried pipe | |
| CN111042160B (en) | Composite covering layer system suitable for slope polluted site and construction method thereof | |
| CN112058893A (en) | Improved generation resistance heating normal position thermal desorption system | |
| CN109821874B (en) | Water and steam stopping structure and method for repairing in-situ thermal desorption soil by using structure | |
| CN211424520U (en) | Solar energy composite heating system | |
| CN201738211U (en) | Snow-smelting device with low temperature heat pipes | |
| CN204141896U (en) | A kind of device improving ground heat exchanger performance | |
| CN106077064B (en) | Steam extraction soil repair system | |
| CN213763426U (en) | Energy-saving and efficient reactor type thermal desorption system | |
| KR20100128364A (en) | Protecting device for preventing foreign substance of energy pile type earth tube heat exchanger | |
| CN107671116B (en) | Improved in-situ resistance heating thermal remediation system and method for organic matter contaminated soil or underground water | |
| CN212656241U (en) | Device for protecting high-grade highway subgrade side slope in permafrost region | |
| CN216226132U (en) | Moisture supply type in-situ electric heating and multiphase extraction coupling soil remediation system | |
| CN105651093A (en) | Underground heat exchange tube for energy exchange system of ground-source deep well | |
| CN204662479U (en) | A kind of building steel concrete accumulation of energy basis | |
| CN219198398U (en) | Seepage-proofing device for municipal engineering water supply and drainage pipe | |
| CN212494529U (en) | Improved generation resistance heating normal position thermal desorption system | |
| CN217726630U (en) | Resistance heating normal position thermal desorption system | |
| CN217234619U (en) | Direct-buried road-crossing laying protection device for thermal pipeline |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |