CN112676330A - Filler for in-situ thermal desorption repair of heating well in polluted site and preparation method thereof - Google Patents
- ️Tue Apr 20 2021
Info
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Publication number
- CN112676330A CN112676330A CN202011581524.6A CN202011581524A CN112676330A CN 112676330 A CN112676330 A CN 112676330A CN 202011581524 A CN202011581524 A CN 202011581524A CN 112676330 A CN112676330 A CN 112676330A Authority
- CN
- China Prior art keywords
- filler
- premix
- thermal desorption
- partition plate
- situ thermal Prior art date
- 2020-12-28 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.)
- Pending
Links
- 239000000945 filler Substances 0.000 title claims abstract description 87
- 238000010438 heat treatment Methods 0.000 title claims abstract description 59
- 238000003795 desorption Methods 0.000 title claims abstract description 46
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 38
- 230000008439 repair process Effects 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000002689 soil Substances 0.000 claims abstract description 41
- 238000005192 partition Methods 0.000 claims abstract description 33
- 239000000463 material Substances 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 23
- 238000002156 mixing Methods 0.000 claims abstract description 18
- 238000005067 remediation Methods 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 11
- 239000006004 Quartz sand Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 6
- 235000019738 Limestone Nutrition 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 239000010459 dolomite Substances 0.000 claims description 5
- 229910000514 dolomite Inorganic materials 0.000 claims description 5
- 239000006028 limestone Substances 0.000 claims description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 5
- 239000000395 magnesium oxide Substances 0.000 claims description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 4
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 3
- 239000002131 composite material Substances 0.000 abstract description 7
- 239000002994 raw material Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 238000006386 neutralization reaction Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000003900 soil pollution Methods 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000003802 soil pollutant Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a filler for in-situ thermal desorption repair of a heating well in a polluted site and a preparation method thereof, wherein the method comprises the following steps: step 1, blending and uniformly mixing an alkaline material and an original filler to obtain a first premix; step 2, mixing and uniformly mixing the heat conduction material and the original filler to obtain a second premix; step 3, arranging a partition plate between the soil and the outer wall of the heating well pipe, and filling the first premix between the soil and the partition plate to form a first premix layer; step 4, filling the second premix between the partition plate and the outer wall of the heating well pipe to form a second premix layer; and 5, taking out the partition plate to finish filling. The invention also provides the filler prepared by the method. The composite filler provided by the invention can improve the use efficiency of the heating well and prolong the service life of the heating well through a specific filling mode, has the outstanding characteristics of easily available raw materials, simplicity in operation, good heat conduction effect, protection of the wall of the heating well and the like, and has a wide application prospect.
Description
Technical Field
The invention relates to a filler used in the technical field of in-situ thermal desorption remediation of a polluted site and a preparation method thereof, in particular to a filler which is used for an in-situ thermal desorption remediation heating well of the polluted site and is placed between an underground heating well pipe and a soil pore gap around the underground heating well pipe and a preparation method thereof.
Background
The thermal desorption remediation of the polluted soil refers to a process of heating the soil by means of heat exchange and the like, so that pollutants in the soil are evaporated, volatilized and separated from the soil. The thermal desorption remediation technology can effectively separate pollutants such as volatile organic compounds and semi-volatile organic compounds in the soil under a high-temperature environment, so that the concentration of the soil pollutants is reduced, the requirements of relevant soil remediation targets are met, and the purpose of soil remediation is achieved.
The in-situ thermal desorption remediation technology for the polluted land is widely applied to soil pollution remediation engineering at present, and common in-situ thermal desorption technologies for the polluted soil comprise a steam heating thermal desorption technology, a resistance heating thermal desorption technology, a heat conduction thermal desorption technology and the like. The heat conduction and desorption technology can be suitable for the polluted soil containing chlorine and high-boiling-point organic pollutants, and has strong applicability to the restoration of various organic polluted plots.
The heat conduction and desorption technology indirectly heats the polluted soil by conducting heat outwards through a high-temperature medium in the heating well, and the heat in the heating well needs to sequentially pass through a plurality of layers of media such as a heating well pipe wall, a well pipe external filler and the like in the heat conduction process, and finally is conducted to the peripheral soil and heated. The existing filling materials such as quartz sand used between a heating well pipe and a soil gap generally have the problems of small heat capacity, low heat transfer efficiency and the like, and how to improve the filling materials becomes one of key technologies for improving the energy efficiency of an in-situ thermal desorption technology. Meanwhile, in the practical application process of the in-situ thermal desorption technology, the problems that characteristic pollutants in soil such as chlorinated organic pollutants are subjected to pyrolysis and hydrolysis reaction in the repair process, so that an acid environment is formed in the soil and a heating well pipe is corroded are solved, and the problems can be solved by improving the filler.
Disclosure of Invention
The invention aims to provide a composite filler and a preparation method thereof, which aim at overcoming the defects of the existing filler of a heating well in an in-situ thermal desorption repair mode and solve the existing problems through a specific filling mode, thereby improving the use energy efficiency of the heating well and prolonging the service life of the heating well.
In order to achieve the above object, the present invention provides a method for preparing a filler for in-situ thermal desorption repair of a heater well in a contaminated site, wherein the method comprises: step 1, blending an alkaline material and an original filler, and uniformly mixing to obtain a first premix;
step2, mixing the heat conduction material and the original filler, and uniformly mixing to obtain a second premix;
step3, arranging a partition plate between the soil and the outer wall of the heating well pipe, and filling the first premix obtained in the step 1 between the soil and the partition plate through the partition plate to form a first premix layer;
step4, filling the second premix obtained in the
step2 between the partition plate and the outer wall of the heating well pipe through the partition plate to form a second premix layer; and 5, taking out the partition plate to finish filling.
The preparation method of the filler for the heating well for in-situ thermal desorption remediation of the contaminated site comprises the step of preparing the raw filler, wherein the raw filler comprises quartz sand and/or ceramsite.
The preparation method of the filler for the in-situ thermal desorption repair heating well of the polluted site comprises the step of preparing the filler for the in-situ thermal desorption repair heating well of the polluted site, wherein the alkaline material comprises any one or more of granular limestone, dolomite and magnesium oxide.
The preparation method of the filler for the in-situ thermal desorption repair heating well of the polluted site comprises the following steps of mixing the alkaline material and the original filler according to the weight ratio of (10-50) to (90-50).
In the
step2, the heat conducting material with the particle equivalent diameter ratio of (10-40) to (90-60) and the original filler are mixed according to the volume ratio of 20: 80.
The preparation method of the filler for the in-situ thermal desorption repair heating well of the polluted site is characterized in that the heat conducting material comprises any one or more of granular alumina, silicon carbide and aluminum balls.
The preparation method of the filler for the heating well for in-situ thermal desorption remediation of the contaminated site comprises the
step3, wherein the thickness of the first premix layer is 2-5 cm.
The preparation method of the filler for the heating well for in-situ thermal desorption remediation of the contaminated site comprises the
step4, wherein the thickness of the second premix layer is 5-10 cm.
The preparation method of the filler for the heating well for in-situ thermal desorption remediation of the polluted site is characterized in that the partition plate is a bottomless cylindrical partition plate.
The invention also provides the filler for the heating well for in-situ thermal desorption remediation of the contaminated site, which is prepared by the method.
The filler for the heating well for in-situ thermal desorption remediation of the polluted site and the preparation method thereof provided by the invention have the following advantages:
(1) the acidic corrosion of the heating well pipe wall can be effectively improved, and the alkaline substance in the filler close to one side of the soil and the hydrogen chloride/hydrochloric acid generated in the thermal desorption process are subjected to neutralization reaction to generate salt and water, so that the corrosion to the pipe wall is relieved, and the service life of the heating well is prolonged.
(2) The heat conducting performance of the filler can be enhanced, the heat conducting materials with relatively high heat conducting coefficient and high temperature resistance are mixed uniformly in the original filler to form a heat conducting network, and meanwhile, the contact thermal resistance is reduced or eliminated, and the overall heat transfer efficiency of the filler is improved.
(3) The performance advantages of the composite filler for neutralizing acidic substances and conducting heat can be exerted, and the layer of the alkaline mixed filler is arranged on the layer far away from the heating well, so that the neutralization reaction is prevented from occurring on one side close to the pipe wall, and the protection effect of the filler on the heating well pipe is enhanced; meanwhile, the mixed heat-conducting filler is arranged on a layer close to the heating well pipe, so that the heat-conducting property advantage of the filler can be well exerted.
On the whole, the invention has the outstanding characteristics of easily available raw materials, simple operation, good heat conduction effect, protection of the wall of the heating well pipe and the like, and has wide application prospect.
Drawings
Fig. 1 is a schematic longitudinal structural diagram of the packing arrangement of the heating well for in-situ thermal desorption remediation of a contaminated site.
Fig. 2 is a schematic diagram of a transverse structure of the packing arrangement of the heating well for in-situ thermal desorption remediation of a contaminated site.
Wherein: 1. soil holes; 2. a partition plate; 3. a heating well; 4. a second premix layer; 5. a first premix layer.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1 and fig. 2, the present invention provides a method for preparing a filler for in-situ thermal desorption remediation of a heater well in a contaminated site, which comprises: step 1, blending an alkaline material and an original filler, and uniformly mixing to obtain a first premix;
step2, mixing the heat conduction material and the original filler, and uniformly mixing to obtain a second premix;
step3, arranging a
partition plate2 between a soil hole 1 in soil and the outer wall of a well pipe of a heating well 3, and filling the first premix obtained in the step 1 between the soil and the
partition plate2 through the
partition plate2 to form a first premix layer 5;
step4, filling the second premix obtained in the
step2 between the
partition plate2 and the outer wall of the well pipe of the heating well 3 through the
partition plate2 to form a
second premix layer4; and 5, taking out the
partition plate2 to finish filling.
Preferably, the primary filler comprises quartz sand and/or ceramic grains.
The alkaline material comprises any one or more of granulated limestone, dolomite, and magnesia.
The alkaline material and the original filler are mixed according to the weight ratio of (10-50) to (90-50).
In the
step2, the heat conduction material with the particle equivalent diameter ratio of (10-40) to (90-60) and the original filler are proportioned according to the volume ratio of 20: 80.
The heat conducting material comprises any one or more of granular alumina, silicon carbide and aluminum balls.
In the
step3, the thickness of the first premix layer 5 is 2-5 cm.
In the
step4, the thickness of the
second premix layer4 is 5-10 cm.
The
partition board2 is a hollow cylindrical partition board of bottomless cylinder type.
The invention also provides the filler for the heating well for in-situ thermal desorption remediation of the contaminated site, which is prepared by the method.
One of the principles of the invention is as follows: in view of the corrosion of hydrogen chloride (hydrochloric acid) possibly generated underground to a steel well pipe of a heating well in the practical application of in-situ thermal desorption remediation, the basic material is added into the filler by utilizing the principle of generating salt and water by acid-base neutralization, and the material can perform neutralization reaction with acidic substances in soil, and does not generate toxic and harmful substances to cause new soil pollution. The alkaline material comprises any one or combination of more of granulated limestone, dolomite, magnesium oxide, and the like.
The second principle is as follows: the mixed filler is prepared by mixing two or more different types of fillers to change the parameters of the original single filler, such as heat conductivity, mechanical property and the like, wherein the mixed filler comprises a filler with a large heat conductivity coefficient doped in a common filler, or a filler with good heat conductivity and a filler with good heat storage performance; meanwhile, the heat-conducting property of the matched fillers with different particle size grades is changed obviously, the heat-conducting coefficient of air is far lower than that of the solid fillers, and the heat-conducting coefficient of the mixed fillers is lower when the porosity of the mixed fillers is larger. The original filler is doped with the heat conduction material with relatively high heat conductivity coefficient and high temperature resistance, so that the contact thermal resistance among the fillers can be reduced or eliminated, and the overall heat transfer efficiency of the filler is improved by selecting proper particle size grading. The thermally conductive material comprises any one or combination of more of granular alumina, silicon carbide, aluminum balls, and the like.
The third principle is as follows: the layered filling is to fill two or more different types of fillers according to different levels, wherein the fillers have different properties and obvious limits. According to the actual conditions and requirements in engineering, double-layer or multi-layer filling modes can be designed in pertinence at positions with different distances from the heating source, so that the filling material can fully exert the advantages in the aspects of heat conduction, heat storage and well wall protection.
The filler for in-situ thermal desorption repair of a heater well in a contaminated site and the preparation method thereof provided by the invention are further described below with reference to the examples.
Example 1
The pipe diameter of the heating well 3 is 120cm, a gap of 10cm is formed between the pipe wall and the soil hole 1, and composite filler is filled in the gap.
The composite filler comprises the following raw materials in percentage by weight:
the first premix layer 5 (particle size 0.6-1.2mm) composed of an alkaline mixture comprises, in parts by weight: 20 parts of dolomite and 80 parts of quartz sand.
The
second premix layer4 composed of the heat-conducting mixed material comprises the following components in parts by weight: 20 parts of alumina with the particle diameter of 0.5mm and 80 parts of quartz sand with the particle diameter of 1.0 mm.
The filler is prepared and filled, and the specific process is as follows:
and preparing materials according to the components to respectively obtain the uniformly mixed alkaline premix and the heat-conducting premix.
A bottomless
cylindrical partition plate2 with the diameter of 136cm is inserted into a gap between a heating well 3 pipe and a soil hole 1, and the soil hole 1 is divided into an inner layer close to a well pipe and an outer layer close to soil.
The alkaline premix, i.e., the first premix, is filled into the outer layer of the soil hole 1.
The heat-conductive premix, i.e., the second premix, is filled into the inner layer of the soil hole 1.
Taking out the bottomless
cylindrical partition board2 which is put into the soil hole 1.
Example 2
The pipe diameter of the
heating well3 is 120cm, a 15cm gap is formed between the pipe wall and the soil hole 1, and composite filler is filled in the gap.
The composite filler comprises the following raw materials in percentage by weight:
the first premix layer 5 (particle size 0.8-1.6mm) composed of an alkaline mixture comprises, in parts by weight: 30 parts of limestone and 70 parts of ceramsite.
The
second premix layer4 composed of the heat-conducting mixed material comprises the following components in parts by weight: 20 parts of aluminum balls with the particle diameter of 0.6mm and 80 parts of ceramsite with the particle diameter of 1.2 mm.
The filler is prepared and filled, and the specific process is as follows:
and preparing materials according to the components to respectively obtain the uniformly mixed alkaline premix and the heat-conducting premix.
A bottomless
cylindrical partition plate2 with the diameter of 140cm is inserted into a gap between a well pipe and a soil hole 1 of a
heating well3, and the soil hole 1 is divided into an inner layer close to the well pipe and an outer layer close to soil.
The alkaline premix, i.e., the first premix, is filled into the outer layer of the soil hole 1.
The heat-conductive premix, i.e., the second premix, is filled into the inner layer of the soil hole 1.
Taking out the bottomless
cylindrical partition board2 which is put into the soil hole 1.
The filler for the heating well for in-situ thermal desorption repair of the polluted site and the preparation method thereof provided by the invention solve the existing problems through a specific filling mode, thereby improving the use energy efficiency of the heating well and prolonging the service life of the heating well. The method has the outstanding characteristics of easily obtained raw materials, simple operation, good heat conduction effect, protection of the wall of the heating well pipe and the like, and has wide application prospect.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (10)
1. A preparation method of a filler for in-situ thermal desorption repair of a heating well of a polluted site is characterized by comprising the following steps:
step 1, blending an alkaline material and an original filler, and uniformly mixing to obtain a first premix;
step 2, mixing the heat conduction material and the original filler, and uniformly mixing to obtain a second premix;
step 3, arranging a partition plate between the soil and the outer wall of the heating well pipe, and filling the first premix obtained in the step 1 between the soil and the partition plate through the partition plate to form a first premix layer;
step 4, filling the second premix obtained in the step 2 between the partition plate and the outer wall of the heating well pipe through the partition plate to form a second premix layer;
and 5, taking out the partition plate to finish filling.
2. The method for preparing the filler for the in-situ thermal desorption repair heater well of the polluted site as claimed in claim 1, wherein the original filler comprises quartz sand and/or ceramsite.
3. The method for preparing the filler for the in-situ thermal desorption repair heater well of the polluted site as claimed in claim 1, wherein the alkaline material comprises any one or more of granular limestone, dolomite and magnesium oxide.
4. The method for preparing the filler for the in-situ thermal desorption repair heater well of the polluted site as claimed in claim 3, wherein the weight ratio of the alkaline material to the original filler is (10-50) to (90-50).
5. The method for preparing the filler for the in-situ thermal desorption repair heater well of the polluted site as claimed in claim 1, wherein in the step 2, the heat conducting material with the particle equivalent diameter ratio of (10-40) to (90-60) and the original filler are proportioned according to the volume ratio of 20: 80.
6. The method for preparing the filler for the in-situ thermal desorption repair heater well of the polluted site as claimed in claim 5, wherein the heat conduction material comprises any one or more of granular alumina, silicon carbide and aluminum balls.
7. The method for preparing the filler for the in-situ thermal desorption repair heater well of the polluted site according to claim 1, wherein in the step 3, the thickness of the first premix layer is 2-5 cm.
8. The method for preparing the filler for the in-situ thermal desorption repair heater well of the polluted site according to claim 1, wherein in the step 4, the thickness of the second premix layer is 5-10 cm.
9. The method for preparing the filler for the in-situ thermal desorption repair heater well of the polluted site as claimed in claim 1, wherein the partition plate is a bottomless cylindrical partition plate.
10. A filler for in-situ thermal desorption remediation of a heater well in a contaminated site prepared by the method of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011581524.6A CN112676330A (en) | 2020-12-28 | 2020-12-28 | Filler for in-situ thermal desorption repair of heating well in polluted site and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011581524.6A CN112676330A (en) | 2020-12-28 | 2020-12-28 | Filler for in-situ thermal desorption repair of heating well in polluted site and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112676330A true CN112676330A (en) | 2021-04-20 |
Family
ID=75453676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011581524.6A Pending CN112676330A (en) | 2020-12-28 | 2020-12-28 | Filler for in-situ thermal desorption repair of heating well in polluted site and preparation method thereof |
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| CN (1) | CN112676330A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1441709A (en) * | 2000-04-14 | 2003-09-10 | 国际壳牌研究有限公司 | Heater element for use in situ thermal desorption soil remediation system |
| US20100276115A1 (en) * | 2008-08-05 | 2010-11-04 | Parrella Michael J | System and method of maximizing heat transfer at the bottom of a well using heat conductive components and a predictive model |
| US20120071573A1 (en) * | 2009-03-30 | 2012-03-22 | Erema Engineering Recycling Maschinen Und Anlagen Gesellschaft M.B.H. | Neutralization by Filler |
| CN104810631A (en) * | 2015-04-23 | 2015-07-29 | 国家电网公司 | Ground connection resistance reduction composite padding for acid red soil |
| CN107952789A (en) * | 2017-11-14 | 2018-04-24 | 中国环境科学研究院 | Thermal desorption system, thermal desorption-oxidation repair system in situ and restorative procedure in situ |
| CN109336241A (en) * | 2018-11-30 | 2019-02-15 | 中国矿业大学 | A kind of closed coal mine acid mine water treatment method |
-
2020
- 2020-12-28 CN CN202011581524.6A patent/CN112676330A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1441709A (en) * | 2000-04-14 | 2003-09-10 | 国际壳牌研究有限公司 | Heater element for use in situ thermal desorption soil remediation system |
| US20100276115A1 (en) * | 2008-08-05 | 2010-11-04 | Parrella Michael J | System and method of maximizing heat transfer at the bottom of a well using heat conductive components and a predictive model |
| US20120071573A1 (en) * | 2009-03-30 | 2012-03-22 | Erema Engineering Recycling Maschinen Und Anlagen Gesellschaft M.B.H. | Neutralization by Filler |
| CN104810631A (en) * | 2015-04-23 | 2015-07-29 | 国家电网公司 | Ground connection resistance reduction composite padding for acid red soil |
| CN107952789A (en) * | 2017-11-14 | 2018-04-24 | 中国环境科学研究院 | Thermal desorption system, thermal desorption-oxidation repair system in situ and restorative procedure in situ |
| US20190143385A1 (en) * | 2017-11-14 | 2019-05-16 | Chinese Research Academy Of Environmental Sciences | In-situ thermal desorption system, in-situ thermal desorption-oxidation repair system and repair method |
| CN109336241A (en) * | 2018-11-30 | 2019-02-15 | 中国矿业大学 | A kind of closed coal mine acid mine water treatment method |
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