CN112474766A - Manufacturing method of standardized in-situ heat removal additional heating element - Google Patents
Manufacturing method of standardized in-situ heat removal additional heating element Download PDFInfo
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- CN112474766A CN112474766A CN202011306992.2A CN202011306992A CN112474766A CN 112474766 A CN112474766 A CN 112474766A CN 202011306992 A CN202011306992 A CN 202011306992A CN 112474766 A CN112474766 A CN 112474766A
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- heating
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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
- B09C1/062—Reclamation of contaminated soil thermally by using electrode or resistance heating elements
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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
Abstract
The invention discloses a method for manufacturing a standardized in-situ thermal desorption additional heat element, which comprises the following steps of firstly determining the pollution depth of polluted soil and heating temperatures required by different depths; one or more standardized heating pipes of different sizes and/or different powers are then selected according to the contamination and connected in series to form a heating unit, and then a top connection unit is connected at the top of the heating unit and a bottom connection unit is connected at the bottom to form a heating element.
Description
Technical Field
The invention relates to a soil remediation technology, in particular to a manufacturing method of a standardized in-situ thermal desorption heating element.
Background
The in-situ thermal desorption technology has the advantages of high restoration efficiency, wide adaptability, small disturbance and the like, and is widely applied at home and abroad. Hydrogeology of the site to be repaired, pollutant types, distribution conditions and the like are important factors influencing the design and application of the in-situ thermal desorption technology. In actual engineering, the distribution concentration and the depth difference of pollutants in a polluted site are large, and the heating temperatures required by different types of pollutants or stratum conditions are also different, so that when the in-situ thermal desorption technology is used for repairing, the condition of the polluted site needs to be finely depicted, and an in-situ thermal desorption additional thermal element suitable for the site can be designed according to the specific condition of the site and the heating requirement for repairing. The heating element of high pertinence, customization leads to heating components and parts cycle length of processing, and is difficult in the pollution place repetition of difference, and rate of equipment utilization is low, and is extravagant serious. In addition, the existing heater can not carry out accurate heating according to the difference of the properties of target pollutants, the difference of the heating rates of different hydrogeological conditions and the like, so that the technical energy consumption is large, and the repair cost is high.
Disclosure of Invention
Aiming at partial or all problems in the prior art, the invention provides a method for manufacturing a standardized in-situ thermal release additional heat element, which comprises the following steps:
determining the pollution condition of the polluted soil, including the pollution depth and the heating temperature required by different depths;
selecting a heating pipe, and selecting one or more standard heating pipes with different sizes and/or different powers according to the pollution condition; and
assembling a heating element, connecting selected heating tubes in series to form a heating unit, and connecting a top connection unit at a top of the heating unit and a bottom connection unit at a bottom of the heating unit to form a heating element.
Arranging the one or more heating elements in the contaminated soil, in-situ thermal desorption can be implemented, wherein the top connecting unit is exposed out of the ground, and the heating unit and the bottom connecting unit are arranged below the ground.
Further, the standardized heating tube comprises:
the connector comprises an inner sleeve, wherein a connector is arranged at the top of the inner sleeve, the bottom of the inner sleeve is of a groove structure, a connecting hole is formed in the bottom surface of the inner sleeve, and the connecting hole is matched with the connector in shape;
the resistance wire is arranged inside the inner sleeve in a wire winding or straight wire mode, and the resistance wire is electrically connected with the connector and the connecting hole;
the magnesium oxide powder or the aluminum oxide powder is filled in the inner sleeve and coats the resistance wire; and
and the insulating heat-insulating waterproof material is arranged at the part, which is not provided with the connecting hole, of the bottom of the inner sleeve.
Further, the standardized heating pipe has a length of 1-6m and a diameter of 30-50 mm.
Furthermore, the power of the standardized heating pipes is determined according to the resistance value of the resistance wire, and one heating element can be formed by connecting the standardized heating pipes with different or the same resistance values in series, so that different parts of the same heating element have different or the same heating power.
Furthermore, the resistance wire is made of iron nickel or iron nickel, and the surface load of the resistance wire is not higher than 3w/cm2The resistance wires with different resistance values are obtained by adjusting the length or the diameter of the resistance wires.
Furthermore, the outer side of the top of the inner sleeve is provided with outer spiral threads, and the inner surface of the groove structure at the bottom of the inner sleeve is provided with inner spiral threads, so that the standardized heating pipes can be in threaded connection.
Further, a temperature measuring probe is arranged inside the standardized heating pipe.
Further, the top connecting unit is of a standardized design and comprises a protection pipe and a rainproof and power-on box, wherein a wiring hole and a temperature measuring hole are formed in the bottom of the rainproof and power-on box, the wiring hole is used for wiring and is used for providing a power supply for the heating unit, the temperature measuring hole is used for installing a temperature measuring probe, the protection pipe is coated outside the rainproof and power-on box, and inner spiral threads are formed in the bottom of the protection pipe, so that the top connecting unit can be in threaded connection with the heating unit.
Further, the bottom connecting unit is of a standardized design and comprises an insulating base, a connecting key and a protective sleeve, wherein the connecting key is arranged at the top of the connecting base and is matched and electrically connected with a connecting hole of the lowest-layer standardized electric heating tube, the protective sleeve is coated outside the insulating base, and outer spiral threads are arranged on the outer wall of the protective sleeve, so that the bottom connecting unit can be in threaded connection with the heating unit.
According to the manufacturing method of the standard in-situ thermal desorption additional heat element, the standard heating pipes with different lengths or powers are selected for assembly according to the property difference of target pollutants and the temperature rise rate difference of different hydrogeological conditions, so that the polluted soil is accurately heated, the remediation efficiency is improved, the energy consumption is reduced, and the remediation cost is reduced. As the adopted units are standardized design products, the whole heating system is very convenient to install and disassemble, can be universal among different repair sites, can be recycled, and greatly shortens the construction period. The present invention is based on the unique insight of the inventors: the inventor finds that in a polluted site, pollutant components and pollution degree in soil can change along with the depth of the soil, and if a uniform heating mode is adopted for restoration, the situation that the soil restoration effects at different depths are different greatly often occurs, and the energy conservation is not facilitated; in the invention, by adopting an assembled and differentiated heating scheme (namely, heating pipes with different powers are adopted at different depths) at the soil with different depths, the precise remediation of the soil with different depths can be achieved, meanwhile, the energy waste caused by overheating is avoided, and the heating element is convenient to install and disassemble and can be used universally among different remediation sites.
Drawings
To further clarify the above and other advantages and features of embodiments of the present invention, a more particular description of embodiments of the present invention will be rendered by reference to the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. In the drawings, the same or corresponding parts will be denoted by the same or similar reference numerals for clarity.
FIG. 1 is a schematic flow chart illustrating a method of fabricating a standardized in-situ thermal release add-on thermal element according to one embodiment of the invention;
fig. 2 shows a schematic view of a standardized in-situ thermal desorption heating element according to an embodiment of the present invention;
FIG. 3 shows a schematic structural view of a standardized heating tube according to an embodiment of the invention;
FIG. 4 shows a schematic structural diagram of a top connection unit of one embodiment of the present invention; and
fig. 5 shows a schematic structural diagram of a bottom connection unit according to an embodiment of the present invention.
Detailed Description
In the following description, the present invention is described with reference to examples. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details, or with other alternative and/or additional methods, materials, or components. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention. Similarly, for purposes of explanation, specific numbers, materials and configurations are set forth in order to provide a thorough understanding of the embodiments of the invention. However, the invention is not limited to these specific details. Further, it should be understood that the embodiments shown in the figures are illustrative representations and are not necessarily drawn to scale.
Reference in the specification to "one embodiment" or "the embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.
It should be noted that the embodiment of the present invention describes the process steps in a specific order, however, this is only for the purpose of illustrating the specific embodiment, and does not limit the sequence of the steps. Rather, in various embodiments of the present invention, the order of the steps may be adjusted according to process adjustments.
In order to realize accurate heating according to the difference of target pollutant properties, different hydrogeological conditions, the difference of heating rates and the like, the invention provides a manufacturing method of a standardized in-situ thermal desorption additional heating element.
Fig. 1 is a flow chart illustrating a method for fabricating a standardized in-situ thermal release add-on thermal element according to an embodiment of the invention. As shown in fig. 1, a method for manufacturing a standardized in-situ thermal release additional thermal element includes:
first, in step 101, the heating temperature of the different depths of contaminated soil is determined. Analyzing the rock-soil conditions of the polluted site, and determining the heating temperatures required at different depths according to the properties of pollutants in the soils at different depths, the heating rate of the soil layer and the difference of heat dissipation;
next, at step 102, a heating tube is selected. Selecting one or more standardized heating pipes with different lengths and/or different powers according to the pollution depth and the required heating temperature determined in the step 101, wherein the length of each standardized heating pipe is determined according to the thickness of a polluted soil layer, a standardized heating pipe with high power is selected for the depth requiring high-temperature heating, and a standardized heating pipe with low power is selected for the depth requiring low-temperature heating, so that rapid and accurate heating is realized; in one embodiment of the present invention, the length of the standardized heating tube is 1-6m, preferably 1m, 2m, 4m or 6m, the diameter of the standardized heating tube is 30-50mm, and standardized heating tubes with different lengths and diameters can be selected as required for assembly; in yet another embodiment of the present invention, the standardized heating tube is configured as shown in fig. 3, and includes:
the connector 0311 is arranged at the top of the inner sleeve 031, the bottom of the inner sleeve 031 is a groove structure, the bottom surface of the inner sleeve 031 is provided with a connecting hole 0312, and the connecting hole 0312 is matched with the connector 0311 in shape; in an embodiment of the present invention, the outer side of the top of the inner sleeve 031 is provided with an external spiral thread, and the inner surface of the groove structure at the bottom of the inner sleeve 031 is provided with an internal spiral thread, so that the standardized heating tube can be heated by the standardized heating tube
Can be connected with other components in a threaded manner;
a resistance wire 032, which is disposed inside the inner sleeve 031 in a wire winding or straight manner, wherein the resistance wire 032 is electrically connected to the connector 0311 and the connection hole 0312; in one embodiment of the present invention, the power of the standardized heating tube is determined according to the resistance value of the resistance wire 032, the resistance wire 032 is made of iron nickel or iron nickel, and the surface load of the resistance wire 032 is not higher than 3w/cm2The resistance wires with different resistance values can be obtained by adjusting the length or the diameter of the resistance wires, so that the standard heating pipes with different powers can be obtained, one heating element can be formed by connecting the standard heating pipes with different or the same resistance values in series, and the heating powers of different parts of the same heating element are different or the same. According to the parameter calculation, the heating power of the standardized heating pipe is 0-2kw/m and can be continuously adjusted;
magnesium oxide powder or aluminum oxide powder 033 filled inside the inner sleeve 031 and wrapping the resistance wire 032 to prevent the resistance wire 032 from being short-circuited; and
the insulating heat-insulating waterproof material 034 is arranged at the part, which is not provided with the connecting hole, of the bottom of the inner sleeve;
in a further embodiment of the invention, a temperature probe 035 is arranged inside the standardized heating tube for real-time monitoring of the temperature inside each standardized heating tube, wherein the temperature probe 035 is placed from the top of the standardized heating tube, whereby, in a further embodiment of the invention, the standardized heating tube further comprises a temperature sensor extending through the standardized heating tube
The mounting hole is used for placing the temperature measuring probe; and
finally, at step 103, the heating element is assembled. Connecting the selected standardized heating pipes in series to form a heating unit 003, after the connection is completed, the current values of the standardized heating pipes are equal, then connecting a top connecting unit 001 at the top of the heating unit 003, and connecting a bottom connecting unit 002 at the bottom of the heating unit 003, as shown in fig. 2; in an embodiment of the present invention, the top connection unit 001 is of a standardized design, and as shown in fig. 4, includes a protection tube 011 and a rainproof box 012, wherein the rainproof box 012 is provided at the bottom thereof with a wiring hole 0121 and a temperature measurement hole 0122, wherein the wiring hole 0121 is used for wiring and providing power for the heating unit 003, the temperature measurement hole 0122 is used for installing a temperature measurement probe, the protection tube 011 covers the rainproof box 012, and the bottom of the protection tube 011 is provided with an internal spiral thread, so that the top connection unit 001 can be in threaded connection with the heating unit 003; in another embodiment of the present invention, the bottom connection unit 002 is of a standardized design, as shown in fig. 5, and includes an insulating base 021, a connection key 022 and a protection sleeve 023, wherein the connection key 022 is disposed on the top of the connection base 021, and is adapted to and electrically connected to the connection hole of the lowermost standardized electrical heating tube, the protection sleeve 023 is wrapped outside the insulating base 021, and an outer wall of the protection sleeve 023 is provided with an external spiral thread, so that the bottom connection unit 002 can be screwed with the heating unit 003.
Arranging one or more heating elements in the contaminated soil as required, and then implementing in-situ thermal desorption, wherein the top connecting unit is exposed out of the ground, and the heating unit and the bottom connecting unit are arranged below the ground.
The standardized heating pipes, the top connecting unit and the bottom connecting unit which are selected in the embodiment of the invention are all in standardized design, and the processing technology and equipment adopted by different standardized heating pipes are basically the same, so that the standardized heating pipes can be produced in batches and kept in stock. When the repair is required, the standardized heating pipes of different specifications are selected for assembly only according to the property difference of the target pollutants, the heat dissipation difference of different depths and the temperature rise difference of different lithological properties, and then the heating elements of corresponding specifications are manufactured, so that the time for customizing the repair equipment is greatly shortened on one hand, and the repair construction period is shortened. On the other hand, the device can carry out accurate heating repair pertinently, improves the repair efficiency, reduces unnecessary energy consumption and reduces the repair cost compared with the traditional uniform heating mode. Meanwhile, the system adopts a mode of splicing standard parts which can be produced in a large scale, is convenient to install and disassemble, can be recycled, and has a wide application range.
While various embodiments of the present invention have been described above, it should be understood that they have been presented by way of example only, and not limitation. It will be apparent to persons skilled in the relevant art that various combinations, modifications, and changes can be made thereto without departing from the spirit and scope of the invention. Thus, the breadth and scope of the present invention disclosed herein should not be limited by any of the above-described exemplary embodiments, but should be defined only in accordance with the following claims and their equivalents.
Claims (10)
1. A method for manufacturing a standardized in-situ thermal release additional heating element is characterized by comprising the following steps:
determining the pollution condition of the polluted soil, including the pollution depth and the heating temperature required by different depths;
selecting one or more standardized heating pipes of different sizes and/or different powers according to the pollution condition; and
selected standardized heating tubes are connected in series to form a heating unit, and a top connection unit is connected at the top of the heating unit and a bottom connection unit is connected at the bottom of the heating unit to form a heating element.
2. The method of claim 1, wherein the heating temperature required for different depths is determined by the difference in heat dissipation from the soil at different depths, the rate of temperature rise of the lithology of the soil layer, and the nature of the contaminants.
3. The method of manufacturing of claim 1, wherein the standardized heating tube comprises:
the connector comprises an inner sleeve, wherein a connector is arranged at the top of the inner sleeve, the bottom of the inner sleeve is of a groove structure, and the bottom surface of the inner sleeve is provided with a connecting hole matched with the connector in shape;
the resistance wire is arranged inside the inner sleeve in a wire winding or straight wire mode, and the resistance wire is electrically connected with the connector and the connecting hole;
the magnesium oxide powder or the aluminum oxide powder is filled in the inner sleeve and coats the resistance wire; and
and the insulating heat-insulating waterproof material is arranged at the part, which is not provided with the connecting hole, of the bottom of the inner sleeve.
4. The method of claim 3, wherein the standardized heating tube has a length of 1-6m and a diameter of 30-50 mm.
5. The method according to claim 3, wherein the output of the standardized heating tube is determined as a function of the resistance value of the resistance wire.
6. The manufacturing method of claim 5, wherein the resistance wire is made of iron nickel or iron nickel, and the surface load of the resistance wire is not higher than 3w/cm2The resistance wires with different resistance values are obtained by adjusting the length or the diameter of the resistance wires.
7. The method of claim 3, wherein the outer side of the top of the inner sleeve is provided with an external spiral thread and the inner surface of the groove structure at the bottom of the inner sleeve is provided with an internal spiral thread, so that the standardized heating tube can be screwed together.
8. The method of claim 3, wherein a temperature probe is further disposed within the standardized heating tube.
9. The manufacturing method of claim 1, wherein the top connection unit is of standardized design and comprises a protection tube and a rainproof connection box, wherein the bottom of the rainproof connection box is provided with a wiring hole and a temperature measuring hole, the wiring hole is used for wiring and providing power for the heating unit, the temperature measuring hole is used for installing a temperature measuring probe, the protection tube is coated outside the rainproof connection box, and the bottom of the protection tube is provided with an internal spiral thread.
10. The manufacturing method according to claim 1, wherein the bottom connection unit is of a standardized design and includes an insulation base, a connection key and a protection sleeve, wherein the connection key is disposed on the top of the connection base and is adapted to and electrically connected with the connection hole of the lowest standardized electrical heating tube, the protection sleeve is covered outside the insulation base, and an outer wall of the protection sleeve is provided with an outer spiral thread.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011306992.2A CN112474766A (en) | 2020-11-20 | 2020-11-20 | Manufacturing method of standardized in-situ heat removal additional heating element |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011306992.2A CN112474766A (en) | 2020-11-20 | 2020-11-20 | Manufacturing method of standardized in-situ heat removal additional heating element |
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| CN112474766A true CN112474766A (en) | 2021-03-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112517621A (en) * | 2020-11-18 | 2021-03-19 | 吉林大学 | Heating pipe for in-situ thermal desorption additional heat device for polluted soil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107552555A (en) * | 2017-09-29 | 2018-01-09 | 中科鼎实环境工程股份有限公司 | The system and method for electric heater unit and in-situ immobilization ultra-deep organic polluted soil |
| CN207386153U (en) * | 2017-10-17 | 2018-05-22 | 杰瑞环保科技有限公司 | Soil targets heating unit |
| CN209222874U (en) * | 2018-12-12 | 2019-08-09 | 吉林大学 | A kind of soil remediation thermal desorption heating device |
| CN111229803A (en) * | 2020-01-13 | 2020-06-05 | 中国石油化工股份有限公司 | In-situ thermal desorption device and in-situ thermal desorption system |
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2020
- 2020-11-20 CN CN202011306992.2A patent/CN112474766A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107552555A (en) * | 2017-09-29 | 2018-01-09 | 中科鼎实环境工程股份有限公司 | The system and method for electric heater unit and in-situ immobilization ultra-deep organic polluted soil |
| CN207386153U (en) * | 2017-10-17 | 2018-05-22 | 杰瑞环保科技有限公司 | Soil targets heating unit |
| CN209222874U (en) * | 2018-12-12 | 2019-08-09 | 吉林大学 | A kind of soil remediation thermal desorption heating device |
| CN111229803A (en) * | 2020-01-13 | 2020-06-05 | 中国石油化工股份有限公司 | In-situ thermal desorption device and in-situ thermal desorption system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112517621A (en) * | 2020-11-18 | 2021-03-19 | 吉林大学 | Heating pipe for in-situ thermal desorption additional heat device for polluted soil |
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Effective date of registration: 20220825 Address after: Room b1-4265, building 3, 20 Yong'an Road, Shilong Economic Development Zone, Mentougou District, Beijing 102300 Applicant after: Zhongke langmai Technology Co.,Ltd. Address before: Room 928, Xinghai international building, 28 Wansheng street, Suzhou Industrial Park, Suzhou area, Suzhou pilot Free Trade Zone, Jiangsu Province 215128 Applicant before: Suzhou elite environmental protection Co.,Ltd. |
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Application publication date: 20210312 |