A heating well and contaminated soil remediation device

Abstract

The utility model provides a heating well, including an outer tube, an air intake pipe, an exhaust pipe and a plurality of choke assemblies, wherein the air intake pipe is inserted into the outer tube, and the plurality of choke assemblies are arranged at intervals along the length direction of the air intake pipe, and the choke assembly includes a connected choke tube and a connecting sleeve, wherein the connecting sleeve is arranged outside the air intake pipe, and a first flow gap is formed between the small diameter end of the choke tube and the air intake pipe. By designing the choke tube and the connecting sleeve as an integral structure, when assembling the heating well, by arranging the connecting sleeve on the air intake pipe and fixing it, the installation of the choke assembly is realized, and it is also convenient to subsequently put the air intake pipe and the plurality of choke assemblies into the outer tube as a whole, so that the heating well can be quickly assembled, the assembly efficiency is improved, and batch production and manufacturing are convenient. At the same time, when the heating well is in use, the utilization rate of energy can be improved and the heat loss can be reduced. The utility model also provides a contaminated soil remediation device, including the above-mentioned heating well.

Description

Technical Field

[0001] The utility model relates to the technical field of soil remediation, in particular to a heating well and a contaminated soil remediation device. Background Art

[0002] In-situ thermal desorption technology is a highly efficient remediation method that heats the contaminated soil to above the boiling point of the target pollutants, vaporizes or decomposes the pollutants, separates the target pollutants from the soil particles through extraction, and then removes the pollutants in the soil. The technology is widely used because of its advantages such as short remediation time, wide applicability, high remediation efficiency, and no need for large-scale site excavation.

[0003] As the most important component of the in-situ thermal desorption repair device, the heating well greatly affects the repair effect of the repair device and the utilization rate of energy. For the improvement of the heating well, a flow blocking mechanism is usually designed to extend the residence time of the high-temperature airflow in the heating well, thereby improving the heating effect of the heating well. Since the heating well is generally a tubular structure, it is not convenient to install the flow blocking mechanism in the heating well during assembly. Therefore, how to quickly realize the assembly of the heating well with a flow blocking mechanism is a problem that needs to be solved urgently by technical personnel in this field. Utility Model Content

[0004] In view of the defects in the prior art, the purpose of the utility model is to provide a heating well and a contaminated soil remediation device, so as to facilitate the rapid assembly operation of the heating well, improve the assembly efficiency, and facilitate mass production and manufacturing.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a heating well, comprising an outer tube, which is a closed structure at both ends; an air intake pipe, which is inserted into the outer tube along the length direction of the outer tube, the air intake pipe extends out of the top end of the outer tube, and the bottom end of the air intake pipe is close to the bottom of the cavity of the outer tube; an exhaust pipe, one end of which is connected to the outer tube, and the connection between the exhaust pipe and the outer tube is close to the top end of the outer tube; and a plurality of choke components, which are arranged at intervals along the length direction of the intake pipe, and the choke components include a connected choke tube and a connecting sleeve, the choke tube is an inverted cone structure with openings at both ends, the connecting sleeve is arranged in the choke tube and the two are coaxial, and the connecting sleeve is sleeved outside the intake pipe, a first flow gap is formed between the small diameter end of the choke tube and the intake pipe, and the edge of the large diameter end of the choke tube abuts or approaches the inner side wall of the outer tube.

[0006] Preferably, the baffle assembly also includes a guide plate, which is sleeved on the outside of the connecting sleeve or the intake pipe, and the guide plate ring is located above a corresponding small-diameter end of the baffle tube, and a second flow gap is formed between the guide plate and the inner wall of the outer tube, and the guide plate is used to guide the airflow passing through the first flow gap to the second flow gap.

[0007] Preferably, a guide surface is provided on the bottom surface of the guide plate, and one end of the guide surface away from the axis of the air intake pipe is inclined upward.

[0008] Preferably, the guide plate is sleeved outside the connecting sleeve.

[0009] Preferably, a plurality of connecting rods are provided on the outer side wall of the connecting sleeve, and the other ends of the connecting rods are connected to the inner side wall of the choke cylinder.

[0010] Preferably, the outer tube includes an intermediate tube body, a plug and a tube cap, the intermediate tube is an open structure at both ends, the plug blocks the bottom end of the intermediate tube body, and the tube cap blocks the top end of the intermediate tube body; the edge of the large diameter end of the choke tube abuts or approaches the inner wall of the intermediate tube body, the intake pipe passes through the tube cap, and the exhaust pipe is passed through the intermediate tube body.

[0011] Preferably, the inner side wall of the plug is provided with a limiting flange, and the outer side wall of the lowermost baffle cylinder abuts against the limiting flange.

[0012] Preferably, the limiting flange extends along the circumferential direction of the plug, and the limiting flange is provided with a limiting surface that matches with the outer side wall of the choke tube.

[0013] The utility model also provides a contaminated soil remediation device, comprising the above-mentioned heating well.

[0014] Beneficial effects of the utility model:

[0015] The utility model discloses a heating well, which designs a choke cylinder and a connecting sleeve into an integral structure. When assembling the heating well, the connecting sleeve is placed on the air intake pipe and fixed, thereby achieving the installation of the choke component and facilitating the subsequent placement of the air intake pipe and multiple choke components into an outer pipe as a whole, thereby enabling rapid assembly operations on the heating well, improving assembly efficiency, and facilitating mass production and manufacturing.

[0016] At the same time, when the heating well is in use, the high-temperature airflow provided by the heat source enters from the upper end of the air inlet pipe and enters the outer tube from the bottom end of the air inlet pipe. During the flow of the high-temperature airflow, part of the high-temperature airflow will stay in the angle area formed between the outer wall of the choke tube and the inner wall of the outer tube. In this way, part of the high-temperature airflow will be intercepted at each choke tube, which extends the residence time of the high-temperature airflow in the heating well, and the outer tube heats the soil more effectively. In this way, the energy utilization rate is improved, the heat loss is reduced, and the repair effect of the heating well is improved.

[0017] The utility model discloses a contaminated soil remediation device. By using the above-mentioned heating well, the overall structure is easy to manufacture and produce, and the difficulty of assembly is reduced. At the same time, the shallow layer, middle layer and lower layer of the soil in the target area can be heated relatively fully, thereby improving the utilization rate of energy and enhancing the remediation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0019] Figure 1 A cross-sectional schematic diagram of a heating well provided in one embodiment of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the flow-blocking component;

[0021] Figure 3 is a cross-sectional schematic diagram of a flow-blocking component;

[0022] Figure 4 for Figure 1 The local schematic diagram of the A in the middle;

[0023] Figure 5 is a cross-sectional schematic diagram of the plug;

[0024] Figure 6 This is a schematic diagram of the explosion of the outer tube;

[0025] Reference numerals:

[0026] 10. Outer tube; 11. Intermediate tube body; 12. Plug; 121. Limiting flange; 122. Limiting surface; 13. Pipe cap; 20. Inlet pipe; 30. Exhaust pipe; 40. Thwart assembly; 41. Thwart tube; 42. Connecting sleeve; 43. Guide plate; 431. Guide surface; 44. Connecting rod; 51. First flow gap; 52. Second flow gap. DETAILED DESCRIPTION

[0027] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0028] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present utility model, the meaning of "plurality" is more than two, unless otherwise clearly and specifically limited.

[0031] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0032] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] Embodiment 1

[0034] like Figure 1-6 As shown, in one embodiment of the utility model, a heating well is provided, including an outer tube 10, an air intake pipe 20, an exhaust pipe 30 and a plurality of flow-blocking components 40. The outer tube 10 is a closed structure at both ends. The air intake pipe 20 is arranged in the outer tube 10 along the length direction of the outer tube 10. The air intake pipe 20 extends out of the top end of the outer tube 10, and the bottom end of the air intake pipe 20 is close to the bottom of the cavity of the outer tube 10. One end of the exhaust pipe 30 is connected to the outer tube 10, and the connection between the exhaust pipe 30 and the outer tube 10 is close to the top end of the outer tube 10. A plurality of choke assemblies 40 are arranged at intervals along the length direction of the intake pipe 20. The choke assemblies 40 include a choke tube 41 and a connecting sleeve 42 that are connected. The choke tube 41 is an inverted cone structure with openings at both ends. The connecting sleeve 42 is arranged inside the choke tube 41 and the two are coaxial. The connecting sleeve 42 is sleeved outside the intake pipe 20. A first flow gap 51 is formed between the small diameter end of the choke tube 41 and the intake pipe 20, and the edge of the large diameter end of the choke tube 41 abuts or approaches the inner wall of the outer tube 10.

[0035] A heating well disclosed in the present embodiment is designed to have an integral structure by designing a choke tube 41 and a connecting sleeve 42. When assembling the heating well, the connecting sleeve 42 is sleeved on the air intake pipe 20 and fixed (such as by welding). This achieves the installation of the choke assembly 40, and also facilitates the subsequent placement of the air intake pipe 20 and multiple choke assemblies 40 as a whole into the outer tube 10, so that the heating well can be assembled quickly, thereby improving the assembly efficiency and facilitating mass production and manufacturing.

[0036] At the same time, when the heating well is in use, the high-temperature airflow provided by the heat source enters from the upper end of the air inlet pipe 20 and enters the outer tube 10 from the bottom end of the air inlet pipe 20. During the flow of the high-temperature airflow, due to the angle area formed between the outer wall of the choke tube 41 and the inner wall of the outer tube 10, part of the high-temperature airflow will stay in the angle area. In this way, each choke tube 41 will intercept part of the high-temperature airflow, extending the residence time of the high-temperature airflow in the heating well, and the outer tube 10 will heat the soil more effectively. In this way, the energy utilization rate is improved, the heat loss is reduced, and the repair effect of the heating well is also improved. Of course, there may be a very small part of the hot airflow that passes through the gap between the edge of the large diameter end of the choke tube 41 and the inner wall of the outer tube 10.

[0037] In one embodiment, the baffle assembly 40 further includes a guide plate 43, which is sleeved on the connecting sleeve 42 or the intake pipe 20. The guide plate 43 is located above the small diameter end of a corresponding baffle tube 41. A second flow gap 52 is formed between the guide plate 43 and the inner wall of the outer tube 10. The guide plate 43 is used to guide the airflow passing through the first flow gap 51 to the second flow gap 52. After the high-temperature airflow passes through the first flow gap 51, it will be blocked by the guide plate 43 during the flow process, so that it can only flow to the second flow gap 52. After the high-temperature airflow passes through the second flow gap 52, part of the high-temperature airflow will flow to the angle area formed between the outer wall of the baffle tube 41 and the inner wall of the outer tube 10, while part of the high-temperature airflow continues to flow upward.

[0038] By designing the guide plate 43, the high-temperature airflow passing through the first flow gap 51 can be guided to the angle area formed by the upper baffle tube 41 and the outer tube 10. At the same time, the upward flow path of the high-temperature airflow is correspondingly extended, so that the temperature of the heating well is more uniform during operation, the utilization rate of the heat source is improved, and the heat loss is reduced.

[0039] In one embodiment, in order to further improve the deflection effect of the deflector plate 43 , a deflector surface 431 is provided on the bottom surface of the deflector plate 43 , and one end of the deflector surface 431 away from the axis of the intake pipe 20 is inclined upward.

[0040] In one embodiment, the guide plate 43 is sleeved on the outside of the connecting sleeve 42. By integrating the baffle cylinder 41 and the guide plate 43 on the connecting sleeve 42 in advance, after the connecting sleeve 42 is fixedly sleeved on the intake pipe 20, the installation of the baffle assembly 40 is realized, which simplifies the assembly process and facilitates the mass production of the baffle assembly 40.

[0041] In one embodiment, the outer wall of the connecting sleeve 42 is provided with a plurality of connecting rods 44, and the other end of the connecting rod 44 is connected to the inner wall of the choke tube 41. With the connection of the plurality of connecting rods 44, a firm connection between the connecting sleeve 42 and the choke tube 41 is achieved, and at the same time, the design of the connecting rod 44 also facilitates the passage of high-temperature airflow.

[0042] In one embodiment, the outer tube 10 includes an intermediate tube body 11, a plug 12 and a cap 13. The intermediate tube is open at both ends. The plug 12 blocks the bottom end of the intermediate tube body 11, and the cap 13 blocks the top end of the intermediate tube body 11. The edge of the large-diameter end of the choke tube 41 abuts against or approaches the inner wall of the intermediate tube body 11. The air intake pipe 20 passes through the cap 13, and the exhaust pipe 30 is arranged on the intermediate tube body 11. By designing the outer tube 10 as a split structure, it is convenient to assemble the air intake pipe 20 pre-assembled with multiple choke assemblies 40 into the intermediate tube body 11, thereby facilitating the assembly of the heating well and improving the product quality.

[0043] In one embodiment, the inner side wall of the plug 12 is provided with a limiting flange 121, and the outer side wall of the lowermost choke tube 41 abuts against the limiting flange 121. The limiting flange 121 extends along the circumference of the plug 12, and the limiting flange 121 is provided with a limiting surface 122 matched with the outer side wall of the choke tube 41.

[0044] During the assembly process, the plug 12 and the exhaust pipe 30 can be welded and fixed to the intermediate pipe body 11 respectively, and the multiple flow-blocking components 40 can be welded and fixed to the intake pipe 20. Then, the intake pipe 20 is inserted into the intermediate pipe body 11. When the outer wall of the lowest flow-blocking cylinder 41 abuts against the limiting surface 122 of the limiting flange 121, the exhaust pipe 30 can no longer be sent into the intermediate pipe body 11, indicating that the position of the exhaust pipe 30 has been installed in place. Finally, the pipe cap 13 is welded and fixed to the intermediate pipe body 11 and the intake pipe 20 respectively, and in this way, the assembly of the heating well is realized.

[0045] Embodiment 2

[0046] In another embodiment of the utility model, a contaminated soil remediation device is provided, including the heating well in the above-mentioned embodiment 1. By using the above-mentioned heating well, the overall structure is easy to manufacture and produce, and the difficulty of assembly is reduced. At the same time, the shallow layer, middle layer and lower layer of the soil in the target area can be heated relatively fully, thereby improving the utilization rate of energy and enhancing the remediation effect.

[0047] In the specification of the present utility model, a lot of specific details are described. However, it is understood that the embodiments of the present utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A heating well, characterized in that: include: The outer tube (10) is a closed structure at both ends; An air inlet pipe (20) is arranged inside the outer pipe (10) along the length direction of the outer pipe (10), the air inlet pipe (20) extends out of the top end of the outer pipe (10), and the bottom end of the air inlet pipe (20) is close to the bottom of the cavity of the outer pipe (10); an exhaust pipe (30), one end of which is in communication with the outer pipe (10), wherein the connection between the exhaust pipe (30) and the outer pipe (10) is close to the top end of the outer pipe (10); and A plurality of flow-blocking components (40) are arranged at intervals along the length direction of the air intake pipe (20), the flow-blocking components (40) comprising a connected flow-blocking cylinder (41) and a connecting sleeve (42), the flow-blocking cylinder (41) being an inverted cone structure with openings at both ends, the connecting sleeve (42) being arranged inside the flow-blocking cylinder (41) and the two being coaxial, the connecting sleeve (42) being sleeved outside the air intake pipe (20), a first flow-through gap (51) being formed between the small-diameter end of the flow-blocking cylinder (41) and the air intake pipe (20), and the edge of the large-diameter end of the flow-blocking cylinder (41) being in contact with or close to the inner side wall of the outer tube (10).

2. The heating well according to claim 1, characterized in that: The baffle assembly (40) further comprises a guide plate (43), wherein the guide plate (43) is sleeved on the connecting sleeve (42) or the intake pipe (20), wherein the guide plate (43) is located above a corresponding small-diameter end of the baffle cylinder (41), and a second flow gap (52) is formed between the guide plate (43) and the inner side wall of the outer pipe (10), and the guide plate (43) is used to guide the airflow passing through the first flow gap (51) to the second flow gap (52).

3. The heating well according to claim 2, characterized in that: The bottom surface of the guide plate (43) is provided with a guide surface (431), and one end of the guide surface (431) away from the axis of the air intake pipe (20) is inclined upward.

4. The heating well according to claim 3, characterized in that: The guide plate (43) is sleeved outside the connecting sleeve (42).

5. The heating well according to claim 1, characterized in that: The outer side wall of the connecting sleeve (42) is provided with a plurality of connecting rods (44), and the other ends of the connecting rods (44) are connected to the inner side wall of the baffle cylinder (41).

6. The heating well according to claim 1, characterized in that: The outer tube (10) comprises an intermediate tube body (11), a plug (12) and a tube cap (13); the intermediate tube is open at both ends; the plug (12) blocks the bottom end of the intermediate tube body (11) and the tube cap (13) blocks the top end of the intermediate tube body (11); The edge of the large diameter end of the baffle tube (41) abuts against or is close to the inner wall of the intermediate tube body (11), the air intake pipe (20) passes through the tube cap (13), and the exhaust pipe (30) is disposed on the intermediate tube body (11).

7. The heating well according to claim 6, characterized in that: The inner side wall of the plug (12) is provided with a limiting flange (121), and the outer side wall of the lowermost baffle cylinder (41) abuts against the limiting flange (121).

8. The heating well according to claim 7, characterized in that: The limiting flange (121) extends along the circumferential direction of the plug (12), and the limiting flange (121) is provided with a limiting surface (122) that matches the outer side wall of the baffle cylinder (41).

9. A contaminated soil remediation device, characterized in that: Comprising the heating well described in any one of claims 1-8.

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