CN113798312A - Thermal desorption device for repairing polluted site below building - Google Patents
Thermal desorption device for repairing polluted site below building Download PDFInfo
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- CN113798312A CN113798312A CN202111154813.2A CN202111154813A CN113798312A CN 113798312 A CN113798312 A CN 113798312A CN 202111154813 A CN202111154813 A CN 202111154813A CN 113798312 A CN113798312 A CN 113798312A
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- heating
- well
- building
- extraction
- thermal desorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/06—Reclamation of contaminated soil thermally
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a thermal desorption device for repairing a polluted site below a building, which comprises a soil heating system and an extraction system, wherein the soil heating system comprises a plurality of heating wells and a plurality of heating devices; the extraction system comprises a heat tracing extraction pipe arranged on the side part of the heating well and an extraction well positioned above the heating well; the building is arranged on the ground, an operable area is arranged on the side portion of the building, the tail gas treatment system is arranged adjacent to the side portion of the operable area, a pollution source is arranged on the lower portion of the building, two ends of the extraction well are respectively communicated with the pollution source and the operable area, a horizontal drilling hole is arranged at the end portion of the heating well, and the horizontal drilling hole is used for horizontal drilling construction of the heating well. The heating device, the heating well, the extraction well and the operable area are matched for operation, so that the problem that polluted soil below a building is repaired without a dismantling plan in a short period can be solved, the interference of soil repairing activities to the building and surrounding residents is reduced, and the problem of poor operability is solved.
Description
Technical Field
The invention relates to the technical field of soil remediation, in particular to a thermal desorption device for remediation of a polluted site below a building.
Background
At present, the in-situ electric heating repair technology has wide application prospect because of high energy utilization rate and sectional heating. However, the buildings on some sites cannot be dismantled in a short period of time, and pollutants below the buildings are migrated and converted into underground water, so that the health of nearby residents is influenced. If the pollution source under the building is not repaired, the groundwater pollution can be continuously existed. The patent document with the application number of CN201922112141.3 discloses an original site oblique angle thermal desorption device for restoring polluted soil below a building, which comprises a drainage system, a working well, a thermal desorption system, a multiphase extraction system and a tail gas treatment system; the thermal desorption system adopts an electric heating mode; the thermal desorption system comprises a power supply distribution box, an electric connection lead, a tube plate, a heating well, a heating rod, a gasket, heat conduction fillers, a temperature measuring core and a heat insulation plate; the heating well is positioned below the polluted area; the heating well is arranged in the working well, and the inclination angle of the heating well and the horizontal plane is 0-15 degrees; the heating rod is positioned at the axial lead position of the heating well; a gasket is welded on the outer side of the heating rod; the size of the gasket ensures that the heating rod is attached to the heating well, and the gasket enables the heating rod to be kept on the central axis of the heating well; the space between the heating rod and the heating well is filled with heat-conducting filler. The utility model discloses can be used to solve the restoration that can not demolish building below polluted soil, guarantee that the original planning in place does not receive destruction.
However, the above patent documents disclose that the following defects exist in the repair of contaminated sites under buildings:
a working well is excavated and constructed on the side of an original site, a heating well is arranged at the bottom of the working well, the inclination angle between the heating well and the horizontal plane is 0-15 degrees, the problem of repairing polluted soil below a building is solved, and the working well is small in space, difficult to drill in an inclined direction and free of operability.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a thermal desorption device for repairing a polluted site below a building, which can solve the problem of poor operability.
One of the purposes of the invention is realized by adopting the following technical scheme:
a thermal desorption device for repairing a polluted site below a building comprises a soil heating system and an extraction system, wherein the soil heating system comprises a plurality of heating wells and a plurality of heating devices; the extraction system comprises a heat tracing extraction pipe arranged on the side part of the heating well and an extraction well positioned above the heating well; the heating device is characterized in that the building is arranged on the ground, an operable area is arranged on the side portion of the building, the tail gas treatment system is arranged adjacent to the side portion of the operable area, a pollution source is arranged on the lower portion of the building, the heating device is arranged in the area of the pollution source, two ends of the heating well are respectively communicated with the pollution source and the operable area, two ends of the extraction well are respectively communicated with the pollution source and the operable area, a horizontal drilling hole is arranged at the end portion of the heating well, and the horizontal drilling hole is used for horizontal drilling construction of the heating well.
Further, the heating well and the extraction well are distributed on two sides of the building.
Furthermore, the heating wells and the extraction wells distributed on one side of the building form single-side assemblies, and each single-side assembly comprises 1-5 heating wells and one extraction well arranged at the upper part of each heating well.
Further, each single-sided assembly was provided with 2 heater wells.
Further, each single-sided assembly includes 1-5 heating devices.
Furthermore, a plurality of sieve pores are formed in the lower side of the extraction well face, the sieve pores are connected with the heat tracing extraction pipe, and extracted gas enters a tail gas treatment system for treatment.
Further, the heat tracing extraction pipes are arranged on the left side, the right side and the lower side of the heating well.
Further, a drill bit for horizontal drilling is arranged at the position of the horizontal drilling hole, and the drill bit is provided with a radio frequency navigation system.
Further, the depth of the heating well ranges from 4 m to 8 m.
Further, the length of the heating well ranges from 50 m to 100 m.
Compared with the prior art, the invention has the beneficial effects that:
the extraction system comprises a heat tracing extraction pipe arranged on the side part of the heating well and an extraction well positioned above the heating well; the heating device is characterized in that the building is arranged on the ground, an operable area is arranged on the side portion of the building, the tail gas treatment system is arranged adjacent to the side portion of the operable area, a pollution source is arranged on the lower portion of the building, the heating device is arranged in the area of the pollution source, two ends of the heating well are respectively communicated with the pollution source and the operable area, two ends of the extraction well are respectively communicated with the pollution source and the operable area, a horizontal drilling hole is arranged at the end portion of the heating well, and the horizontal drilling hole is used for horizontal drilling construction of the heating well. The heating device, the heating well, the extraction well and the operable area are matched for operation, so that the problem that polluted soil below a building is repaired without a dismantling plan in a short period can be solved, the interference of soil repairing activities to the building and surrounding residents is reduced, and the problem of poor operability is solved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view of a preferred embodiment of a thermal desorption device of the present invention for remediation of contaminated sites beneath a building;
FIG. 2 is a top view of the thermal desorption apparatus shown in FIG. 1 for remediation of a contaminated site beneath a building;
fig. 3 is another plan view of the thermal desorption apparatus for restoration of a contaminated site under a building shown in fig. 1.
In the figure: 1. a heating device; 2. a building; 3. a heating well; 4. an operable area; 5. horizontally drilling a hole; 6. an extraction well; 7. a tail gas treatment system.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1-3, a thermal desorption device for repairing a contaminated site below a building comprises a soil heating system and an extraction system, wherein the soil heating system comprises a plurality of heating wells 3 and a plurality of heating devices 1; the extraction system comprises a heat tracing extraction pipe arranged on the side part of the heating well 3 and an extraction well 6 positioned above the heating well 3; the building 2 is arranged on the ground, an operable area 4 is arranged on the side portion of the building 2, a tail gas treatment system 7 is arranged adjacent to the side portion of the operable area 4, a pollution source is arranged on the lower portion of the building 2, the heating device 1 is arranged in the area of the pollution source, two ends of the heating well 3 are respectively communicated with the pollution source and the operable area 4, two ends of the extraction well 6 are respectively communicated with the pollution source and the operable area 4, a horizontal drilling hole 5 is arranged at the end portion of the heating well 3, and the horizontal drilling hole 5 is used for drilling horizontally to construct the heating well 3. The heating device 1, the heating well 3, the extraction well 6 and the operable area 4 are matched for operation, so that the problem that polluted soil below a building is repaired without a dismantling plan in a short period of time can be solved, the interference of soil repairing activities to the building and surrounding residents is reduced, and the problem of poor operability is solved.
Preferably, the heating wells 3 and the extraction wells 6 are distributed on both sides of the building 2. The heating wells 3 and the extraction wells 6 distributed on one side of the building 2 form single-side assemblies, and each single-side assembly comprises 1-5 heating wells 3 and one extraction well 6 arranged on the upper part of each heating well 3. Specifically, in this embodiment, 2 heater wells 3 are provided per one-sided assembly. Each one-sided assembly comprises 1-5 heating devices 1. The burner is arranged at the upper port of the inner pipe of the heating well 3, the heating temperature of the heating device closest to the earth surface is set according to the boiling point of the pollutant, and the heating temperature of the heating device rises in sequence along with the gradual increase of the distance between the heating device and the earth surface.
In particular, underground utility infrastructure that may adversely affect drilling is identified, located, and mapped, including but not limited to water supply pipelines, drainage pipelines, underground optical fibers, underground cables, and the like. And setting parameters such as a horizontal drilling angle, a heating well depth, a heating well length and the like according to the distribution of underground facilities, the range of a pollution source region and an operable region.
Preferably, the lower side of the surface of the extraction well 6 is provided with a plurality of sieve pores, the sieve pores are connected with the heat tracing extraction pipe, and the extracted gas enters the tail gas treatment system 7 for treatment.
Preferably, the heat tracing extraction pipes are arranged at the left side, the right side and the lower side of the heating well.
Preferably, a drill bit for horizontal drilling is arranged at the horizontal drilling hole 5, and the drill bit is provided with a radio frequency navigation system. The signal frequency of the navigation system does not interfere with the normal communication of residents, and meanwhile, the signal transmission is prevented from being blocked or weakened by buildings.
Preferably, the depth of the heating well 3 ranges from 4 to 8 m. The length of the heating well 3 ranges from 50 m to 100 m. Specifically, the extraction pressure of the heat tracing extraction pipe and the extraction well is adjusted in real time according to the concentration data of the surface gaseous pollutants.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (10)
1. The utility model provides a thermal desorption device for building below contaminated site is restoreed, includes soil heating system and extraction system, its characterized in that:
the soil heating system comprises a plurality of heating wells and a plurality of heating devices;
the extraction system comprises a heat tracing extraction pipe arranged on the side part of the heating well and an extraction well positioned above the heating well;
the heating device is characterized in that the building is arranged on the ground, an operable area is arranged on the side portion of the building, the tail gas treatment system is arranged adjacent to the side portion of the operable area, a pollution source is arranged on the lower portion of the building, the heating device is arranged in the area of the pollution source, two ends of the heating well are respectively communicated with the pollution source and the operable area, two ends of the extraction well are respectively communicated with the pollution source and the operable area, a horizontal drilling hole is arranged at the end portion of the heating well, and the horizontal drilling hole is used for horizontal drilling construction of the heating well.
2. The thermal desorption device for the restoration of the polluted site below the building according to claim 1, wherein: the heating well and the extraction well are distributed on two sides of the building.
3. The thermal desorption device for the restoration of the polluted site below the building according to claim 2, wherein: the heating wells and the extraction wells distributed on one side of the building form single-side assemblies, and each single-side assembly comprises 1-5 heating wells and one extraction well arranged at the upper part of each heating well.
4. The thermal desorption device for the restoration of the polluted site below the building according to claim 3, wherein: each single-sided assembly was provided with 2 heater wells.
5. The thermal desorption device for the restoration of the polluted site below the building according to claim 3, wherein: each single-sided assembly includes 1-5 heating devices.
6. The thermal desorption device for the restoration of the polluted site below the building according to claim 1, wherein: and a plurality of sieve pores are formed in the lower side of the extraction well surface, the sieve pores are connected with the heat tracing extraction pipe, and the extracted gas enters a tail gas treatment system for treatment.
7. The thermal desorption device for the restoration of the polluted site below the building according to claim 6, wherein: the heat tracing extraction pipes are arranged on the left side, the right side and the lower side of the heating well.
8. The thermal desorption device for the restoration of the polluted site below the building according to claim 1, wherein: a drill bit for horizontal drilling is arranged at the position of the horizontal drilling hole, and a radio frequency navigation system is arranged on the drill bit.
9. The thermal desorption device for the restoration of the polluted site below the building according to claim 1, wherein: the depth range of the heating well is 4-8 m.
10. The thermal desorption device for the restoration of the polluted site below the building according to claim 1, wherein: the length of the heating well ranges from 50 m to 100 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111154813.2A CN113798312A (en) | 2021-09-29 | 2021-09-29 | Thermal desorption device for repairing polluted site below building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111154813.2A CN113798312A (en) | 2021-09-29 | 2021-09-29 | Thermal desorption device for repairing polluted site below building |
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| Publication Number | Publication Date |
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| CN113798312A true CN113798312A (en) | 2021-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111154813.2A Pending CN113798312A (en) | 2021-09-29 | 2021-09-29 | Thermal desorption device for repairing polluted site below building |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107552557A (en) * | 2017-07-05 | 2018-01-09 | 中海石油环保服务（天津）有限公司 | Reinforced in-situ chemical oxidation remediation process for soil and underground water |
| CN108817053A (en) * | 2018-07-20 | 2018-11-16 | 武汉都市环保工程技术股份有限公司 | Multiphase extraction system and its control method for gas station's soil and groundwater remediation |
| CN111515237A (en) * | 2020-04-22 | 2020-08-11 | 浙江农林大学 | Soil remediation device and method |
| CN212916997U (en) * | 2020-04-24 | 2021-04-09 | 中圣环境科技发展有限公司 | Device for comprehensively repairing soil and underground water based on horizontal directional drilling process |
| CN213968290U (en) * | 2020-12-01 | 2021-08-17 | 中建八局环保科技有限公司 | Horizontal well repair system for in-situ thermal desorption |
-
2021
- 2021-09-29 CN CN202111154813.2A patent/CN113798312A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107552557A (en) * | 2017-07-05 | 2018-01-09 | 中海石油环保服务（天津）有限公司 | Reinforced in-situ chemical oxidation remediation process for soil and underground water |
| CN108817053A (en) * | 2018-07-20 | 2018-11-16 | 武汉都市环保工程技术股份有限公司 | Multiphase extraction system and its control method for gas station's soil and groundwater remediation |
| CN111515237A (en) * | 2020-04-22 | 2020-08-11 | 浙江农林大学 | Soil remediation device and method |
| CN212916997U (en) * | 2020-04-24 | 2021-04-09 | 中圣环境科技发展有限公司 | Device for comprehensively repairing soil and underground water based on horizontal directional drilling process |
| CN213968290U (en) * | 2020-12-01 | 2021-08-17 | 中建八局环保科技有限公司 | Horizontal well repair system for in-situ thermal desorption |
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Application publication date: 20211217 |