A thermal desorption device for soil pollution remediation

Abstract

The utility model discloses a kind of thermal desorption devices of soil pollution remediation, it is related to soil remediation technical field.The thermal desorption device of soil pollution remediation, including processing box and the feed inlet located at top, further include crushing assembly, two groups of crushing assembly are installed in the inner chamber of feed inlet, when soil is added into processing box through feed inlet, soil is crushed by two groups of crushing assembly and is handled;By the cooperation of heating wire and heating assembly, soil at the bottom of processing box is stirred upwards by stirring assembly, top soil flows downwards, forms the soil circulation tumbling of all directions, avoid the uneven heating caused by local accumulation of soil, by the double mode of heating rod contact heating and heating wire wrapping heating, the soil heating speed and temperature uniformity are greatly improved.At this time, soil continues to tumble under the stirring effect, and high-temperature mixing frame, rotating rod and inner frame wall surface are fully contacted, and then the working efficiency of the device for soil treatment can be improved to a certain extent.

Description

Technical Field

[0001] This utility model relates to the field of soil remediation technology, specifically a thermal desorption device for soil pollution remediation. Background Technology

[0002] A large amount of soil in my country is contaminated with organic pollutants such as benzene, toluene, xylene, ethylbenzene, and TPH. As public awareness of the environmental and health hazards of organic pollutants grows, there is an urgent need for economical and effective methods to treat these toxic substances. The main remediation technologies for organically contaminated soil include bioremediation, chemical remediation, and physical remediation. Comparatively, physical or chemical remediation has wider applicability, especially suitable for sites with high concentrations and multi-component organic contamination. Among the many physical or chemical remediation technologies, thermal desorption is a recognized mature and reliable technology for treating organically contaminated soil. Existing thermal desorption devices mostly use a single heating mode, laying heating wires or heating tubes only on the inner wall of the treatment chamber. Heat is transferred from the soil surface to the interior through thermal radiation and heat conduction. This external heating method has a significant temperature gradient problem. The soil in the center of the treatment chamber heats up slowly, and the temperature difference between the soil and the surface soil can reach tens of degrees Celsius, resulting in incomplete volatilization of pollutants, which in turn affects the efficiency of the device in soil remediation to a certain extent. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a thermal desorption device for soil pollution remediation, which solves the problems described in the background section.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a thermal desorption device for soil pollution remediation, comprising a processing tank and a feed inlet located at the top, and further comprising: The crushing components are installed in the inner cavity of the feed inlet. When soil is added to the treatment box through the feed inlet, the soil is crushed by the two sets of crushing components. A stirring assembly is installed radially inside the processing tank; A heating component is installed on a mixing component. As the mixing component rotates and stirs the soil, the heating component fully heats and mixes the soil inside the treatment tank.

[0005] As a preferred technical solution of this utility model, the stirring assembly includes a second motor installed on one side of the processing tank. The output end of the second motor passes through the inner cavity of the processing tank and is fixedly connected to one end of the rotating rod. Multiple sets of mounting seats are installed on the rotating rod, and mixing racks are installed alternately on the mounting seats.

[0006] As a preferred embodiment of this utility model, the mixing frame has an arc-shaped structure.

[0007] As a preferred technical solution of this utility model, the heating assembly includes multiple placement cavities formed in the rotating rod and the mixing frame, heating rods are installed in the placement cavities, and conductive slip rings are provided on the rotating rod.

[0008] As a preferred embodiment of this utility model, an inner frame is installed in the inner cavity of the processing box, and a spiral mounting cavity is opened on the inner wall of the inner frame, in which a heating wire is installed.

[0009] As a preferred technical solution of this utility model, a support assembly is installed at the bottom of the processing box. The support assembly includes a fixed frame disposed on one side below the processing box, a hydraulic cylinder is symmetrically and rotatably mounted on the fixed frame, the top of the hydraulic cylinder is rotatably mounted on the bottom of the processing box, and a support frame is rotatably mounted on one side of the bottom of the processing box at a position corresponding to the fixed frame.

[0010] As a preferred technical solution of this utility model, an air outlet pipe is provided on one side of the processing box, and a discharge port is opened on one side of the processing box at a position corresponding to the support frame. A protective cover is threaded on the outer side of the discharge port.

[0011] As a preferred technical solution of this utility model, adjustment components are provided on the two side walls of the feed inlet. The adjustment components include mounting grooves opened on the feed inlet groove walls, an electric push rod is fixedly installed at one end of the mounting groove, and a mounting block is installed at one end of the electric push rod.

[0012] As a preferred embodiment of the present invention, the crushing assembly includes a crushing roller installed in the inner cavity of the feed inlet, one end of which passes through the feed inlet and is fixedly connected to an output end of the motor.

[0013] As a preferred embodiment of this utility model, another set of the crushing rollers is rotatably mounted on the mounting block.

[0014] This utility model has the following beneficial effects: 1. By using heating wires and heating components in combination, the soil at the bottom of the treatment tank is turned upwards by the stirring component, and the soil at the top flows downwards, forming a comprehensive soil circulation and rolling. This avoids uneven heating caused by local soil accumulation. When the heating rod is powered on, it generates high temperature, which is transferred to the surrounding rolling soil particles through the rotating rod and the wall of the mixing frame, directly contacting and heating the soil. Through the dual mode of contact heating by the heating rod and heating wire wrapping heating, the soil heating speed and temperature uniformity are greatly improved. At this time, the soil continues to roll under the stirring action, making full contact with the high temperature of the mixing frame, rotating rod and inner frame wall, thereby improving the working efficiency of the device for soil treatment to a certain extent.

[0015] 2. Adjustment components are installed on both sides of the feed inlet. By controlling the extension and retraction of the electric actuator in the mounting groove of the feed inlet wall, the mounting block connected to it slides along the mounting groove. Since one set of crushing rollers is rotated and installed on the mounting block, and the other set of crushing rollers is fixedly installed in the inner cavity of the feed inlet, the extension and retraction of the electric actuator can precisely adjust the distance between the two sets of crushing rollers, ensuring that soil blocks of different particle sizes can be effectively crushed in the future, and avoiding large soil blocks from clogging the feed channel or affecting the subsequent thermal desorption efficiency. Attached Figure Description

[0016] Figure 1 This is a frontal three-dimensional structural diagram of the present invention; Figure 2 This is a side view cross-sectional three-dimensional structural schematic diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the internal structure of the processing box of this utility model; Figure 4 This is a frontal cross-sectional three-dimensional structural schematic diagram of the present invention; Figure 5 This is a schematic diagram of the connection structure between the feed inlet and the crushing component of this utility model; Figure 6 For the present utility model Figure 4 Enlarged structural diagram at point A in the middle.

[0017] In the diagram, 1. Processing box; 101. Feed inlet; 102. Discharge outlet; 2. Support assembly; 201. Fixing frame; 202. Hydraulic cylinder; 203. Support frame; 3. Crushing assembly; 301. Crushing roller; 302. Motor 1; 4. Adjustment assembly; 401. Mounting slot; 402. Electric actuator; 403. Mounting block; 5. Air outlet pipe; 6. Inner frame; 601. Mounting cavity; 7. Heating wire; 8. Stirring assembly; 801. Motor 2; 802. Rotating rod; 803. Mounting base; 804. Mixing frame; 9. Heating assembly; 901. Placement cavity; 902. Heating rod. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] The following is based on Figure 1 - Figure 6 This invention describes a thermal desorption device for soil pollution remediation provided in an embodiment of the present invention.

[0021] Please see Figure 1 - Figure 6 This utility model provides a technical solution: a thermal desorption device for soil pollution remediation, including a processing tank 1 and a feed inlet 101 located at the top, and further including: Crushing component 3: Two sets of crushing components 3 are installed in the inner cavity of the feed inlet 101. When soil is added to the treatment box 1 through the feed inlet 101, the soil is crushed by the two sets of crushing components 3. A stirring assembly 8 is installed radially inside the processing tank 1. Heating component 9 is installed on mixing component 8. When mixing component 8 rotates and stirs the soil, heating component 9 fully heats and mixes the soil inside treatment box 1. Mixing component 8 includes a second motor 801 installed on one side of treatment box 1. The output end of the second motor 801 passes through the inner cavity of treatment box 1 and is fixedly connected to one end of rotating rod 802. Multiple sets of mounting seats 803 are installed on rotating rod 802. Mixing frames 804 are installed alternately on mounting seats 803. Mixing frames 804 have an arc-shaped structure. Heating component 9 includes multiple sets of placement cavities 901 opened in rotating rod 802 and mixing frames 804. Heating rods 902 are installed in placement cavities 901. Conductive slip rings are provided on rotating rod 802 to avoid wire entanglement. Inner frame 6 is installed in the inner cavity of treatment box 1. Spiral mounting cavities 601 are opened on the inner wall of inner frame 6. Heating wires 7 are installed in mounting cavities 601. In this embodiment, after the soil is crushed by the two sets of crushing components 3 inside the feed inlet 101, it enters the processing chamber 1. The heating wire 7 is activated by an external controller, generating a ring-shaped high-temperature area. This creates a uniform ring-shaped heat source within the processing chamber 1. Simultaneously, the motor 801 is activated by the external controller, its output end passing through the side wall of the processing chamber 1, driving the fixedly connected rotating rod 802 to rotate radially at high speed. Multiple mounting seats 803 on the rotating rod 802 rotate synchronously with it, thereby driving the staggered arc-shaped mixing frames 804 on the mounting seats 803 to rotate. The arc-shaped structure of the arc-shaped mixing frame 804 reduces soil resistance and simultaneously stirs the soil at the bottom of the processing chamber 1 upwards and the soil at the top downwards, creating an all-around mixing effect. The soil is circulated and tumbled to avoid uneven heating caused by localized soil accumulation. At this time, the heating rod 902 inside the rotating rod 802 and the mixing frame 804 is turned on. After the heating rod 902 is powered on, it generates high temperature. The high temperature is transferred to the surrounding tumbling soil particles through the walls of the rotating rod 802 and the mixing frame 804, directly heating the soil in contact. The heating wire 7 heats the soil particles from the outside, forming a sandwich heating mode with the built-in heating rod 9, which greatly improves the soil heating speed and temperature uniformity. At this time, the soil continues to tumble under the stirring action, making full contact with the high temperature of the mixing frame 804, the rotating rod 802 and the inner frame 6. Organic pollutants in the soil are volatilized under the high temperature and separated from the soil particles, thereby improving the working efficiency of the device for soil treatment to a certain extent.

[0022] Specifically, a support assembly 2 is installed at the bottom of the processing box 1. The support assembly 2 includes a fixed frame 201 located on one side below the processing box 1. A hydraulic cylinder 202 is symmetrically and rotatably mounted on the fixed frame 201. The top of the hydraulic cylinder 202 is rotatably mounted on the bottom of the processing box 1. A support frame 203 is rotatably mounted on one side of the bottom of the processing box 1 at a position corresponding to the fixed frame 201. An air outlet 5 is provided on one side of the processing box 1. A discharge port 102 is opened on one side of the processing box 1 at a position corresponding to the support frame 203. A protective cover is threaded onto the outer side of the discharge port 102. In this embodiment, during the treatment of the soil treatment tank 1, the exhaust pipe 5 on one side of the treatment tank 1 is connected to the external exhaust gas treatment system. The pollutant-containing exhaust gas generated by thermal desorption enters the exhaust gas treatment system through the exhaust pipe 5 under the action of the air pressure difference inside the treatment tank 1. After purification and meeting the standards, it is discharged to avoid secondary air pollution. When the thermal desorption repair is completed, the motor 801, heating rod 902 and heating wire 7 are turned off to stop stirring and heating. The threaded protective cover on the outside of the discharge port 102 is unscrewed to expose the discharge channel. The hydraulic cylinders 202 symmetrically installed on the fixing frame 201 are energized and extend and retract. Since the top of the hydraulic cylinder 202 is rotatably connected to the bottom of the treatment tank 1 and the bottom side of the treatment tank 1 is rotatably connected to the support frame 203, the extension and retraction of the hydraulic cylinder 202 causes the treatment tank 1 to tilt around the rotation axis of the support frame 203. The repaired soil inside the treatment tank 1 is discharged from the discharge port 102 along the tilted tank wall under the action of gravity, completing one soil repair cycle. Specifically, adjustment components 4 are provided on both sides of the feed inlet 101. The adjustment components 4 include an installation groove 401 opened on the groove wall of the feed inlet 101. An electric push rod 402 is fixedly installed at one end of the installation groove 401, and an installation block 403 is installed at one end of the electric push rod 402. The crushing component 3 includes a crushing roller 301 installed in the inner cavity of the feed inlet 101. One end of the crushing roller 301 passes through the feed inlet 101 and is fixedly connected to the output end of the motor 302. Another set of crushing rollers 301 is rotatably installed on the installation block 403. In this embodiment, the crushing spacing needs to be adjusted according to the initial particle size of the soil to be treated by adjusting component 4. The extension and retraction of the electric actuator 402 within the mounting groove 401 of the feed inlet 101 is controlled, causing the connected mounting block 403 to slide along the mounting groove 401. Since one set of crushing rollers 301 is rotatably mounted on the mounting block 403, and the other set of crushing rollers 301 is fixedly mounted inside the feed inlet 101, the extension and retraction of the electric actuator 402 can precisely adjust the spacing between the two sets of crushing rollers 301, ensuring that soil clods of different particle sizes can be effectively crushed subsequently, avoiding... To prevent large clumps of soil from clogging the feed channel or affecting subsequent thermal desorption efficiency, the motor 302 is powered on by an external controller. Its output drives the crushing roller 301, which is fixedly connected to it, to rotate at high speed. This causes the two sets of crushing rollers 301 to rotate in opposite directions. The contaminated soil to be remediated is poured in from the feed inlet 101. Under the action of gravity, the soil enters between the two sets of crushing rollers 301. The high-speed rotating crushing rollers 301 crush large clumps of soil into fine particles through the teeth on the roller surface. The crushed soil particles fall into the inner cavity of the treatment box 1 due to gravity, laying the foundation for subsequent uniform heating.

[0023] The working principle and usage process of this utility model are as follows: The electric push rod 402 is extended and retracted by the adjustment component 4 of the feed inlet 101, which drives the mounting block 403 to move, precisely adjusting the distance between the two sets of crushing rollers 301 to meet the crushing requirements. The motor 1 302 is started, driving the two sets of crushing rollers 301 rotating in opposite directions at high speed, crushing the soil poured into the feed inlet 101 into uniform particles. The particles fall naturally into the processing box 1. The heating wire 7 is turned on to form a ring heat source. At the same time, the motor 2 801 is started to drive the rotating rod 802 and the arc-shaped mixing frame 804 to rotate, realizing the all-round turning of the soil. The rotating rod 802 and the heating rod 902 inside the mixing frame 804 are activated. Through a dual heating mode of contact heating by the heating rod 902 and heating wrapped by the heating wire 7, the temperature rises rapidly, causing the organic pollutants in the soil to volatilize. The volatilized pollutant exhaust gas enters the external exhaust gas treatment system through the exhaust pipe 5 on one side of the treatment box 1. After purification and meeting standards, it is discharged to avoid secondary pollution. After the repair is completed, the protective cover of the discharge port 102 is unscrewed, and the hydraulic cylinder 202 is activated to tilt the treatment box 1 around the support frame 203. The repaired soil is discharged along the box wall from the discharge port 102, completing one cycle. It should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A thermal desorption device for soil pollution remediation, comprising a treatment tank (1) and a feed inlet (101) located at the top, characterized in that, It also includes: Crushing assembly (3): Two sets of crushing assemblies (3) are installed in the inner cavity of the feed inlet (101). When soil is added to the treatment box (1) through the feed inlet (101), the soil is crushed by the two sets of crushing assemblies (3). A stirring assembly (8) is installed at a radial position inside the processing tank (1); Heating component (9) is installed on stirring component (8). When the stirring component (8) rotates and stirs the soil, the heating component (9) fully heats and mixes the soil inside the treatment box (1).

2. The thermal desorption device for soil pollution remediation according to claim 1, characterized in that: The stirring assembly (8) includes a second motor (801) installed on one side of the processing tank (1). The output end of the second motor (801) passes through the inner cavity of the processing tank (1) and is fixedly connected to one end of the rotating rod (802). Multiple sets of mounting seats (803) are installed on the rotating rod (802), and mixing racks (804) are installed alternately on the mounting seats (803).

3. The thermal desorption device for soil pollution remediation according to claim 2, characterized in that: The hybrid rack (804) has an arc-shaped structure.

4. The thermal desorption device for soil pollution remediation according to claim 1, characterized in that: The heating assembly (9) includes multiple placement cavities (901) opened in the rotating rod (802) and the mixing frame (804), heating rods (902) are installed in the placement cavities (901), and conductive slip rings are provided on the rotating rod (802).

5. The thermal desorption device for soil pollution remediation according to claim 1, characterized in that: The inner cavity of the processing box (1) is equipped with an inner frame (6), and the inner wall of the inner frame (6) is provided with a spiral mounting cavity (601), in which a heating wire (7) is installed.

6. The thermal desorption device for soil pollution remediation according to claim 1, characterized in that: The bottom of the processing box (1) is equipped with a support assembly (2). The support assembly (2) includes a fixed frame (201) located on one side below the processing box (1). A hydraulic cylinder (202) is symmetrically and rotatably mounted on the fixed frame (201). The top of the hydraulic cylinder (202) is rotatably mounted on the bottom of the processing box (1). A support frame (203) is rotatably mounted on one side of the bottom of the processing box (1) at a position corresponding to the fixed frame (201).

7. The thermal desorption device for soil pollution remediation according to claim 1, characterized in that: The processing box (1) is provided with an air outlet (5) on one side, and a discharge port (102) is provided on one side of the processing box (1) at the corresponding position of the support frame (203). A protective cover is threaded on the outside of the discharge port (102).

8. The thermal desorption device for soil pollution remediation according to claim 1, characterized in that: Adjustment components (4) are provided on both sides of the feed inlet (101). The adjustment components (4) include an installation groove (401) opened on the groove wall of the feed inlet (101). An electric push rod (402) is fixedly installed at one end of the installation groove (401), and an installation block (403) is installed at one end of the electric push rod (402).

9. The thermal desorption device for soil pollution remediation according to claim 1, characterized in that: The crushing assembly (3) includes a crushing roller (301) installed in the inner cavity of the feed inlet (101), with one end of the crushing roller (301) passing through the feed inlet (101) and fixedly connected to the output end of the motor (302).

10. A thermal desorption device for soil pollution remediation according to claim 9, characterized in that: Another set of the crushing rollers (301) are rotatably mounted on the mounting block (403).

Images