Steam extraction device for contaminated soil remediation

Abstract

The utility model relates to the technical field of soil remediation, in particular to a steam extraction device for contaminated soil remediation, which comprises a mounting plate, an air extracting pump, an air extracting mechanism, a connecting mechanism, a gas injection well and an air injection pump. The connecting mechanism is used for communicating the connecting pipe with the air extracting mechanism, the air extracting mechanism is used for extracting air in soil, the gas injection well is fixedly mounted on the mounting plate, the gas injection pump is fixedly mounted on the mounting plate, the gas injection pump communicates with the gas injection well through a conveying pipe, and the air extracting mechanism comprises a gas extracting well, a well lid and a fixing frame. According to the steam extraction device for contaminated soil remediation, through the arrangement of the air extracting pump, the connecting pipe and the air extracting mechanism, the air extracting pipe can be driven by the moving column to drill into soil to extract steam, use of precisely-connected parts such as threads and gears is avoided, and therefore the using effect of the steam extraction device is improved, and the service life of the steam extraction device is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of soil remediation technology, specifically to a steam extraction device for remediating contaminated soil. Background Technology

[0002] Soil remediation refers to the use of physical, chemical, and biological methods to transfer, absorb, degrade, and transform pollutants in the soil, reducing their concentration to acceptable levels, or converting toxic and harmful pollutants into harmless substances. This improves the physical, chemical, and biological properties of the contaminated soil, re-establishes a healthy soil ecosystem, promotes the growth and reproduction of microorganisms, plants, and other organisms in the soil, and enhances the soil's self-purification capacity and ecological service functions.

[0003] Steam extraction is a physicochemical method for remediating contaminated soil. It involves introducing steam into the contaminated soil, causing the pollutants to volatilize under the influence of heat and steam. The contaminated steam is then extracted from the soil, collected, and treated, thereby removing the pollutants. In this process, the steam raises the soil temperature, accelerating the volatilization of pollutants, while the steam flows through the soil pores, carrying the volatilized pollutants out of the soil.

[0004] Considering that existing steam extraction devices typically require drilling into the soil to extract steam, and that the drill rod is usually connected to the well wall via a threaded connection, the drill bit is driven into the soil by the rotation of the motor gears. However, the steam in the soil is usually corrosive, which means that under long-term working conditions, the threads and gears of the drill rod are prone to corrosion, rust, and damage, thus reducing the effectiveness and service life of the steam extraction device. Utility Model Content

[0005] The purpose of this invention is to provide a steam extraction device for the remediation of contaminated soil.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A steam extraction device for contaminated soil remediation is provided, comprising a mounting plate, an air extraction pump, an air extraction mechanism, a connecting mechanism, an injection well, and an injection pump. The air extraction pump is fixedly mounted on the mounting plate and is connected to the connecting mechanism via a connecting pipe. The connecting mechanism is used to connect the connecting pipe and the air extraction mechanism. The air extraction mechanism is used to extract air from the soil. The injection well is fixedly mounted on the mounting plate, and the injection pump is fixedly mounted on the mounting plate and is connected to the injection well via a delivery pipe.

[0008] Furthermore, the air extraction mechanism includes an air extraction well, a well cover, and a fixing frame. The air extraction well is fixedly installed on the mounting plate, and a through hole is opened on the air extraction well. The well cover is fixedly installed on the air extraction well, and the fixing frame is fixedly installed on the air extraction well.

[0009] Furthermore, the air extraction mechanism also includes an air extraction pipe, a conical head, and a moving mechanism. The air extraction pipe passes through the fixed frame and has an exhaust hole. The conical head is fixedly installed on the air extraction pipe and has an air inlet hole. The air inlet hole is connected to the exhaust hole. The moving mechanism is fixedly installed on the air extraction well and is used to drive the air extraction pipe to move.

[0010] Furthermore, the moving mechanism includes a hydraulic cylinder, a cylinder, a moving column, and a hinged rod. The hydraulic cylinder is fixedly installed on the well cover, the cylinder is fixedly installed on the air extraction well, and a sliding groove is provided on the cylinder. The moving column is slidably installed on the cylinder, and the moving column is fixedly connected to the output end of the hydraulic cylinder. The moving column is hinged to the hinged rod through the hinged column, and the hinged column is slidably connected to the sliding groove. The air extraction pipe is hinged to the hinged rod through a cylindrical block.

[0011] Furthermore, the moving mechanism also includes a guide rod and a connecting plate. One end of the guide rod is fixedly connected to the cylinder, and the other end of the guide rod is fixedly connected to the fixed frame. The guide rod passes through the connecting plate, and the connecting plate is fixedly installed on the exhaust pipe.

[0012] Furthermore, the connection mechanism includes a pipe fitting, a sealing gasket, a ferrule, and a locking block. The pipe fitting is fixedly installed on the manhole cover, the ferrule is inserted into the pipe fitting and communicates with the connecting pipe, the locking block is connected to the pipe fitting by a spring and is slidably connected to the pipe fitting, the sealing gasket is inserted into the ferrule and has a locking groove, and the locking block engages with the locking groove.

[0013] The beneficial effects of this utility model are as follows: This steam extraction device for contaminated soil remediation, through the installation of an air pump, connecting pipe, and air extraction mechanism, can extract steam by driving the air extraction pipe into the soil through a moving column. This avoids the use of precision-connected components such as threads and gears, thereby improving the effectiveness and service life of the steam extraction device. In addition, the connecting mechanism can tightly and seal the connecting pipe and pipe joint, preventing leakage of extracted steam. It also facilitates the installation, disassembly, and replacement of the connecting pipe and pipe joint, further improving the effectiveness and efficiency of the steam extraction device. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments of this utility model will be briefly introduced below.

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the internal structure of the extraction well of this utility model;

[0017] Figure 3 This is a schematic cross-sectional view of the extraction well of this utility model;

[0018] Figure 4 This is a schematic diagram of the main structure of the moving mechanism of this utility model;

[0019] Figure 5 This is a schematic diagram of the disassembled structure of the connecting mechanism of this utility model.

[0020] In the diagram: 1. Mounting plate; 2. Air pump; 3. Connecting pipe; 4. Air extraction mechanism; 41. Air extraction well; 42. Well cover; 43. Through hole; 44. Air extraction pipe; 45. Fixing frame; 46. Conical head; 47. Air inlet; 48. Air outlet; 49. Moving mechanism; 491. Hydraulic cylinder; 492. Cylinder; 493. Moving column; 494. Slide groove; 495. Hinge rod; 496. Guide rod; 497. Cylindrical block; 498. Hinge column; 499. Connecting plate; 5. Connecting mechanism; 51. Pipe joint; 52. Sealing gasket; 53. Sleeve; 54. Locking block; 55. Spring; 56. Slot; 6. Delivery pipe; 7. Air injection well; 8. Air injection pump. Detailed Implementation

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0023] Reference Figure 1The steam extraction device for contaminated soil remediation shown includes a mounting plate 1, an air extraction pump 2, an air extraction mechanism 4, a connecting mechanism 5, an injection well 7, and an injection pump 8. The air extraction pump 2 is fixedly installed on the mounting plate 1 and is connected to the connecting mechanism 5 through a connecting pipe 3. By starting the air extraction pump 2, steam containing pollutants can enter the air extraction pump 2 from the connecting pipe 3 and be discharged outward. The connecting mechanism 5 is used to connect the connecting pipe 3 and the air extraction mechanism 4. The connecting mechanism 5 can improve the sealing effect between the connecting pipe 3 and the air extraction mechanism 4 and facilitate the installation and removal of the connecting pipe 3. The air extraction mechanism 4 is used to extract air from the soil and can transport steam in the soil to the connecting pipe 3. The injection well 7 is fixedly installed on the mounting plate 1 and is used to inject steam into the soil. The injection pump 8 is fixedly installed on the mounting plate 1 and is connected to the injection well 7 through a delivery pipe 6. By starting the injection pump 8, clean steam is delivered to the injection well 7.

[0024] Reference Figures 1 to 3 The extraction mechanism 4 includes an extraction well 41, a well cover 42, and a fixing frame 45. The extraction well 41 is fixedly installed on the mounting plate 1, and a through hole 43 is provided on the extraction well 41. The extraction well 41 is used to transport steam containing pollutants to the connecting pipe 3. The through hole 43 is used for the extraction pipe 44 to extend into and out of the extraction well 41. The well cover 42 is fixedly installed on the extraction well 41, and the fixing frame 45 is fixedly installed on the extraction well 41. The fixing frame 45 is used to support and guide the extraction pipe 44.

[0025] Reference Figure 2 and Figure 4 The extraction mechanism 4 also includes an extraction pipe 44, a conical head 46, and a moving mechanism 49. The extraction pipe 44 passes through the fixed frame 45 and has an exhaust hole 48. The extraction pipe 44 is used to extend into or out of the soil. The exhaust hole 48 is used to transport the vapor containing pollutants in the extraction pipe 44 to the extraction well 41. The conical head 46 is fixedly installed on the extraction pipe 44 and has an air inlet 47. The conical head 46 facilitates the insertion of the extraction pipe 44 into the soil. The air inlet 47 is used to allow vapor in the soil to enter the extraction pipe 44. The air inlet 47 is connected to the exhaust hole 48. The moving mechanism 49 is fixedly installed on the extraction well 41 and is used to move the extraction pipe 44, thereby causing the extraction pipe 44 to extend into or out of the soil.

[0026] Reference Figures 2 to 4The moving mechanism 49 includes a hydraulic cylinder 491, a cylinder 492, a moving column 493, and a hinged rod 495. The hydraulic cylinder 491 is fixedly installed on the well cover 42. By activating the hydraulic cylinder 491, the moving column 493 can be moved. The cylinder 492 is fixedly installed on the air extraction well 41, and a sliding groove 494 is provided on the cylinder 492. The cylinder 492 guides the moving column 493, improving the stability of the moving column 493 during movement. The moving column 493 is slidably installed on the cylinder 492, and the moving column 495... 93 is fixedly connected to the output end of hydraulic cylinder 491. The movement of the moving column 493 can drive the hinge column 498 to move. The moving column 493 is hinged to the hinge rod 495 through the hinge column 498, and the hinge column 498 is slidably connected to the slide groove 494. The movement of the hinge column 498 can drive the hinge rod 495 to move. The suction pipe 44 is hinged to the hinge rod 495 through the cylindrical block 497. The movement of the hinge rod 495 causes the cylindrical block 497 to drive the suction pipe 44 to move.

[0027] Reference Figure 3 and Figure 4 The moving mechanism 49 also includes a guide rod 496 and a connecting plate 499. One end of the guide rod 496 is fixedly connected to the cylinder 492, and the other end of the guide rod 496 is fixedly connected to the fixing frame 45. The guide rod 496 prevents the guide rod 496 from falling off. The guide rod 496 passes through the connecting plate 499, and the connecting plate 499 is fixedly installed on the suction pipe 44. The guide rod 496 and the connecting plate 499 guide the suction pipe 44, preventing the suction pipe 44 from deviating during movement, thereby further improving the stability of the suction pipe 44 during movement.

[0028] Reference Figure 1 and Figure 5The connecting mechanism 5 includes a pipe connector 51, a sealing gasket 52, a clamping sleeve 53, and a locking block 54. The pipe connector 51 is fixedly installed on the well cover 42. The clamping sleeve 53 is inserted into the pipe connector 51 and communicates with the connecting pipe 3. By inserting the clamping sleeve 53 into the pipe connector 51, polluted vapor contained in the extraction well 41 enters the connecting pipe 3 through the pipe connector 51 and the clamping sleeve 53. The locking block 54 is connected to the pipe connector 51 by a spring 55, and the locking block 54 is slidably connected to the pipe connector 51. The elastic force ensures that the locking block 54 remains engaged with the locking groove 56 even without external force. The sealing gasket 52 is inserted into the sleeve 53, which has a locking groove 56. The sleeve 53 and the pipe joint 51 compress the sealing gasket 52, causing the sealing gasket 52 to expand and deform, thereby improving the sealing performance between the sleeve 53 and the pipe joint 51. The locking block 54 engages with the locking groove 56, and the engaging effect of the locking block 54 and the locking groove 56 limits the sleeve 53, keeping it fixed.

[0029] This steam extraction device for contaminated soil remediation, through its air extraction pump, connecting pipe, and extraction mechanism, can extract steam by driving the extraction pipe into the soil via a moving column. This avoids the use of precision-connected components such as threads and gears, thereby improving the effectiveness and service life of the steam extraction device. In addition, the connecting mechanism ensures a tight and sealed connection between the connecting pipe and the pipe fitting, preventing steam leakage and facilitating the installation, disassembly, and replacement of the connecting pipe and pipe fitting, further enhancing the effectiveness and efficiency of the steam extraction device.

[0030] It should be stated that the above-described specific embodiments are merely preferred embodiments of this utility model and the technical principles employed. Those skilled in the art should understand that various modifications, equivalent substitutions, and variations can be made to this utility model. However, such variations, as long as they do not depart from the spirit of this utility model, should be within the protection scope of this utility model. Furthermore, some terminology used in this application specification and claims is not limiting, but merely for ease of description.

Claims

1. A steam leaching apparatus for remediation of contaminated soil, characterized by, The system includes a mounting plate (1), an air pump (2), an air extraction mechanism (4), a connecting mechanism (5), an air injection well (7), and an air injection pump (8). The air pump (2) is fixedly installed on the mounting plate (1), and the air pump (2) is connected to the connecting mechanism (5) through a connecting pipe (3). The connecting mechanism (5) is used to connect the connecting pipe (3) and the air extraction mechanism (4). The air extraction mechanism (4) is used to extract air from the soil. The air injection well (7) is fixedly installed on the mounting plate (1), and the air injection pump (8) is fixedly installed on the mounting plate (1), and the air injection pump (8) is connected to the air injection well (7) through a delivery pipe (6).

2. The apparatus for soil vapor extraction of a contaminated soil according to claim 1, wherein, The air extraction mechanism (4) includes an air extraction well (41), a well cover (42), and a fixing frame (45). The air extraction well (41) is fixedly installed on the mounting plate (1), and a through hole (43) is provided on the air extraction well (41). The well cover (42) is fixedly installed on the air extraction well (41), and the fixing frame (45) is fixedly installed on the air extraction well (41).

3. A steam stripping apparatus for remediation of contaminated soil according to claim 2, wherein The air extraction mechanism (4) further includes an air extraction pipe (44), a conical head (46), and a moving mechanism (49). The air extraction pipe (44) passes through the fixed frame (45) and has an exhaust hole (48). The conical head (46) is fixedly installed on the air extraction pipe (44) and has an air inlet hole (47). The air inlet hole (47) is connected to the exhaust hole (48). The moving mechanism (49) is fixedly installed on the air extraction well (41) and is used to drive the air extraction pipe (44) to move.

4. The apparatus for steam stripping of contaminated soil according to claim 3, wherein The moving mechanism (49) includes a hydraulic cylinder (491), a cylinder (492), a moving column (493), and a hinge rod (495). The hydraulic cylinder (491) is fixedly installed on the well cover (42). The cylinder (492) is fixedly installed on the air extraction well (41), and a sliding groove (494) is provided on the cylinder (492). The moving column (493) is slidably installed on the cylinder (492), and the moving column (493) is fixedly connected to the output end of the hydraulic cylinder (491). The moving column (493) is hinged to the hinge rod (495) through a hinge column (498), and the hinge column (498) is slidably connected to the sliding groove (494). The air extraction pipe (44) is hinged to the hinge rod (495) through a cylindrical block (497).

5. A steam stripping apparatus for the remediation of contaminated soil according to claim 4, wherein, The moving mechanism (49) also includes a guide rod (496) and a connecting plate (499). One end of the guide rod (496) is fixedly connected to the cylinder (492), and the other end of the guide rod (496) is fixedly connected to the fixing frame (45). The guide rod (496) passes through the connecting plate (499), and the connecting plate (499) is fixedly installed on the exhaust pipe (44).

6. The apparatus for steam stripping of contaminated soil according to claim 1, wherein The connecting mechanism (5) includes a pipe joint (51), a sealing gasket (52), a ferrule (53), and a locking block (54). The pipe joint (51) is fixedly installed on the manhole cover (42). The ferrule (53) is inserted into the pipe joint (51) and is connected to the connecting pipe (3). The locking block (54) is connected to the pipe joint (51) by a spring (55) and is slidably connected to the pipe joint (51). The sealing gasket (52) is inserted into the ferrule (53) and a locking groove (56) is provided on the ferrule (53). The locking block (54) is engaged with the locking groove (56).

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