Delivery device for ex-situ thermal desorption of contaminated soil

Abstract

This utility model relates to the field of conveying technology and discloses a conveying device for ex-situ thermal desorption of contaminated soil, including a unit. The outer wall of the unit is provided with an external feeding valve port, an external discharge valve port, an external heat flow conveying port, and an exhaust assembly. When the crushing blade rotates, the limited slider also moves synchronously, thereby driving the side plate, transmission rod, and scraper to move linearly back and forth. This allows the scraper to scrape off the soil adhering to the inner wall of the unit and crush clumps of soil, facilitating the subsequent scraper movement to push the soil out of the external discharge valve port. When the scraper moves, it is periodically touched by the ejector pin, ensuring that soil can pass through the scraper slots, allowing the contaminated soil to better accept heat conduction and enable the pollutants to volatilize.

Description

Technical Field

[0001] This utility model relates to the field of conveying technology, specifically to a conveying device for ex-situ thermal desorption of contaminated soil. Background Technology

[0002] Currently, research and practice in the remediation of organically contaminated soil has become an important aspect of my country's environmental governance. According to a published patent document (Announcement No.: CN214866096U), a device for ex-situ thermal desorption remediation of organically contaminated soil is disclosed. In this device, the heat transfer surface is continuously renewed as the heat transfer disc rotates. The disc surface only serves a heat transfer function. Soil is propelled towards the discharge port by a pusher. The friction between the soil and the heat transfer disc is low, resulting in a long service life for the disc. Furthermore, the heat transfer is uniform, allowing pollutants in the soil to volatilize into a gaseous phase and detach from the soil, resulting in good cleaning performance. Additionally, the included scraper can forcefully clean the soil, preventing it from adhering inside the furnace.

[0003] However, in actual operation, although the aforementioned equipment can achieve heat transfer through the rotation of the heat transfer disc and remove the attached soil with the help of a scraper, soil clods are easily formed during the soil heating process. This results in the soil inside the clods not being fully crushed and heated, affecting the thermal desorption efficiency. In view of this, we propose a conveying device for ex-situ thermal desorption of contaminated soil. Utility Model Content

[0004] The purpose of this invention is to provide a conveying device for ex-situ thermal desorption of contaminated soil, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a conveying device for ex-situ thermal desorption of contaminated soil, comprising a unit, an external feeding valve port provided on the outer wall of the unit, an external discharge valve port provided on the outer wall of the unit, an external heat flow conveying port provided on the outer wall of the unit, an exhaust assembly provided on the outer wall of the unit, and a conveying anti-adhesion assembly provided on the inner wall of the unit. The conveying anti-adhesion assembly includes an outer frame, which is fixedly connected to the outer wall of the unit. A motor is fixedly connected to the outer wall of the outer frame. A reciprocating screw is fixedly connected to the output end of the motor through the outer frame. A pulverizing blade is fixedly connected to the outer wall of the reciprocating screw, and a slider is slidably connected to the outer wall of the reciprocating screw.

[0006] A side plate is fixedly connected to the outer wall of the slider. A transmission rod is fixedly connected to the outer wall of the side plate. A scraper is fixedly connected to the end of the transmission rod. A flow diversion hole is opened on the outer wall of the scraper. A pin is fixedly connected to the inner wall of the unit.

[0007] Preferably, the number of diversion holes is several, and the several diversion holes are arranged in a circumferential array on the outer wall of the scraper.

[0008] Preferably, the transmission rod is slidably connected to the inner wall of the unit, and the outer wall of the transmission rod is adapted to the inner wall of the unit.

[0009] Preferably, the centerline of the reciprocating lead screw and the centerline of the scraper are on the same straight line, so that the scraper can move smoothly.

[0010] Preferably, the outer wall of the scraper is provided with a guide assembly, the guide assembly including a sliding groove, the sliding groove being formed on the outer wall of the scraper, and a diversion guide rod being fixedly connected to the inner wall of the unit.

[0011] Preferably, the scraper is slidably connected to the outer wall of the diversion guide rod, so that the scraper can be guided when it is displaced.

[0012] Preferably, the number of diversion guide rods is two sets, and the two sets of diversion guide rods are arranged on both sides mirroring the center plane of the scraper.

[0013] Compared with the prior art, this utility model provides a conveying device for ex-situ thermal desorption of contaminated soil, which has the following beneficial effects:

[0014] 1. This conveying device for ex-situ thermal desorption of contaminated soil features a limiting slider that moves synchronously as the crushing blades rotate. This movement drives the side plate, transmission rod, and scraper to move linearly back and forth. As the scraper moves, it removes soil adhering to the inner wall of the unit and crushes clumps of soil, facilitating the subsequent discharge of soil through the external outlet valve. The periodic contact of the ejector pins with the scraper during displacement ensures that soil can pass through the scraper slots, allowing the contaminated soil to better absorb heat and volatilize pollutants.

[0015] 2. The conveying device used for ex-situ thermal desorption of contaminated soil has a sliding groove and a diversion guide rod that further guide the scraper when the side plate moves back and forth in a straight line with the transmission rod and scraper. When the soil is added from the external feeding valve, it will be separated and dropped by the two diversion guide rods to prevent the soil from accumulating in clumps, thus further improving the overall practicality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the reciprocating lead screw structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the pulverizing blade structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the scraper structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the diversion guide rod structure of this utility model.

[0021] In the diagram: 1. Unit; 2. External feed valve port; 3. External discharge valve port; 4. External hot flow conveying port; 5. Exhaust assembly; 6. Conveying anti-adhesion assembly; 601. Frame; 602. Motor; 603. Reciprocating screw; 604. Crushing blade; 605. Slider; 606. Side plate; 607. Transmission rod; 608. Scraper; 609. Diverter hole; 610. Ejector pin; 7. Guide assembly; 701. Sliding slot; 702. Diverter guide rod. Detailed Implementation

[0022] like Figures 1-5 As shown, this utility model provides a technical solution: a conveying device for ex-situ thermal desorption of contaminated soil, including a unit 1. The outer wall of the unit 1 is provided with an external feeding valve port 2, an external discharge valve port 3, an external heat flow conveying port 4, an exhaust assembly 5, and an anti-adhesion conveying assembly 6. The anti-adhesion conveying assembly 6 includes an outer frame 601, which is fixedly connected to the outer wall of the unit 1. A motor 602 is fixedly connected to the outer wall of the outer frame 601. The output end of the motor 602 passes through the outer frame 601 and is fixedly connected to a reciprocating screw 603. A crushing blade 604 is fixedly connected to the outer wall of the reciprocating screw 603, and a slider 605 is slidably connected to the outer wall of the reciprocating screw 603.

[0023] Furthermore, the side plate 606 is fixedly connected to the outer wall of the slider 605, the outer wall of the side plate 606 is fixedly connected to the transmission rod 607, the end of the transmission rod 607 is fixedly connected to the scraper 608, the outer wall of the scraper 608 is provided with a diversion hole 609, and the inner wall of the unit 1 is fixedly connected to the ejector pin 610.

[0024] In the embodiments of this utility model, the number of diversion holes 609 is several, and the several diversion holes 609 are arranged in a circumferential array on the outer wall of the scraper 608. The transmission rod 607 is slidably connected to the inner wall of the unit 1, and the outer wall of the transmission rod 607 is adapted to the inner wall of the unit 1. The center line of the reciprocating screw 603 and the center line of the scraper 608 are on the same straight line, so that the scraper 608 can move smoothly.

[0025] Furthermore, the outer wall of the scraper 608 is provided with a guide assembly 7, which includes a sliding groove 701. The sliding groove 701 is opened on the outer wall of the scraper 608. The inner wall of the unit 1 is fixedly connected with a diversion guide rod 702. The scraper 608 is slidably connected to the outer wall of the diversion guide rod 702, so that the scraper 608 can be guided when it is displaced. There are two sets of diversion guide rods 702, and the two sets of diversion guide rods 702 are mirror images of the center plane of the scraper 608 on both sides.

[0026] In this invention, during daily use, the motor 602 is first started to drive the pulverizing blade 604 on the reciprocating screw 603 to rotate. Then, the soil material to be treated can be added through the external feeding valve port 2, and the heating equipment connected to the external heat flow conveying port 4 is started, so that the contaminated soil in the unit 1 undergoes ex-situ thermal desorption treatment. The generated gas will be discharged from the external discharge valve port 3 to the equipment that needs to be processed later. When the pulverizing blade 604 rotates, the limited slider 605 will also move synchronously. This causes the side plate 606, transmission rod 607, and scraper 608 to move linearly back and forth, so that the scraper 608 can scrape off the soil adhering to the inner wall of the unit 1 when it moves, and can also crush the soil clumps, so that the soil can be pushed out of the external discharge valve port 3 when the scraper 608 moves. When the scraper 608 moves, it can be periodically touched by the ejector pin 610, ensuring that soil can pass through the slot of the scraper 608, so that the polluted soil can be better heat-conducted and the pollutants can volatilize.

[0027] When the side plate 606 moves back and forth in a straight line with the transmission rod 607 and the scraper 608, the sliding groove 701 and the diversion guide rod 702 will further guide the scraper 608. When the soil is added from the external feeding valve port 2, it will be separated and dropped by the two diversion guide rods 702 to prevent the soil from accumulating in clumps, thus further improving the overall practicality.

[0028] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A conveying device for ex-situ thermal desorption of contaminated soil, comprising a machine group (1), the outer wall of the machine group (1) is provided with an externally connected feeding valve port (2), the outer wall of the machine group (1) is provided with an externally connected discharge valve port (3), the outer wall of the machine group (1) is provided with an externally connected heat flow conveying port (4), and the outer wall of the machine group (1) is provided with an exhaust assembly (5), characterized in that: The inner wall of the unit (1) is provided with a conveying anti-adhesion assembly (6), which includes: ​ An outer frame (601) is fixedly connected to the outer wall of the unit (1). A motor (602) is fixedly connected to the outer wall of the outer frame (601). The output end of the motor (602) passes through the outer frame (601) and is fixedly connected to a reciprocating screw (603). A crushing blade (604) is fixedly connected to the outer wall of the reciprocating screw (603). A slider (605) is slidably connected to the outer wall of the reciprocating screw (603). Side plate (606), the side plate (606) is fixedly connected to the outer wall of slider (605), the outer wall of the side plate (606) is fixedly connected to a transmission rod (607), the end of the transmission rod (607) is fixedly connected to a scraper (608), the outer wall of the scraper (608) is provided with a diversion hole (609), and the inner wall of the unit (1) is fixedly connected to a ejector pin (610).

2. The conveying device for ex-situ thermal desorption of contaminated soil according to claim 1, characterized in that: The number of diversion holes (609) is several, and the several diversion holes (609) are arranged in a circumferential array on the outer wall of the scraper (608).

3. The conveying device for ex-situ thermal desorption of contaminated soil according to claim 1, characterized in that: The transmission rod (607) is slidably connected to the inner wall of the unit (1), and the outer wall of the transmission rod (607) is adapted to the inner wall of the unit (1).

4. The conveying device for ex-situ thermal desorption of contaminated soil according to claim 1, characterized in that: The centerline of the reciprocating lead screw (603) and the centerline of the scraper (608) are on the same straight line.

5. The conveying device for ex-situ thermal desorption of contaminated soil according to claim 1, characterized in that: The outer wall of the scraper (608) is provided with a guide assembly (7), the guide assembly (7) includes a sliding groove (701), the sliding groove (701) is opened on the outer wall of the scraper (608), and the inner wall of the unit (1) is fixedly connected with a diversion guide rod (702).

6. The conveying device for ex-situ thermal desorption of contaminated soil according to claim 5, characterized in that: The scraper (608) is slidably connected to the outer wall of the diversion guide rod (702).

7. The conveying device for ex-situ thermal desorption of contaminated soil according to claim 5, characterized in that: The number of diversion guide rods (702) is two sets, and the two sets of diversion guide rods (702) are set on both sides with the center plane of the scraper (608) mirrored.

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