Ex situ soil remediation treatment device and method

Abstract

The present invention discloses an ex situ soil remediation treatment device and method, including a feed hopper, a stirring chamber, a stirring shaft, a stirring fork, a stirring fork motor, a stirring reduction motor, and an intelligent control panel. The present invention promotes the contaminated soil to complete multi-track movement by moving the double stirring shafts in opposite directions, and the stirring fork stirs the soil in the dead corner of the stirring chamber to achieve the purpose of efficient mixing and stirring of the contaminated soil and the agent. The double helical stirring arm is equipped with a blade to prevent the soil from agglomerating during the stirring process. The inner wall of the stirring chamber is paved with a small lining board. The stirring shaft, the double helical stirring arm, the blade, the spray valve plate, the stirring fork, and the discharge valve are all treated with an alloy coating, which has the effects of wear resistance, corrosion resistance, and oxidation resistance. The intelligent control panel is connected with the feed hopper, the stirring reduction motor, the sprayer, the humidity sensor, the weighing sensor, the stirring fork motor, and the discharge valve by electrical components to achieve high-precision automatic control.

Description

Technical Field

[0001] The present invention relates to the field of soil remediation equipment, and in particular to an ex situ soil remediation treatment device and method. Background Art

[0002] Ex situ soil remediation has the advantages of complete removal of pollution sources and low potential environmental risks in the remediation site. It is a widely used soil remediation model.

[0003] Commonly used ex situ soil remediation technologies in land remediation projects mainly include solidification and stabilization technology, redox technology, thermal desorption technology, soil leaching technology, etc. Among them, thermal desorption technology and soil leaching technology have a high degree of mechanization, while the more commonly used solidification and stabilization technology and redox technology have a lower degree of mechanization and precision, which is mainly reflected in the mixing process of the solidifying agent or redox agent with the contaminated soil. Some directly use manual spreading, which may not only cause material dust waste, but also even endanger the health and safety of construction workers.

[0004] The patent specification with publication number CN 107321253 A discloses a mixing drum of a soil remediation device, including a drum body, which is divided into two chambers by a partition, and the two chambers are respectively provided with a mixing device and a lifting device, and a feeding hopper is provided on the top of the drum body, and the mixing device includes a mixing motor and a mixing shaft, and the mixing shaft is vertically distributed inside the drum body, and mixing rods are evenly installed on the mixing shafts, and a number of discs perpendicular to the mixing rods are fixed on the shaft of the mixing rods; a lifting shaft is fixedly installed in another chamber of the drum body, and a lifting spiral is fixedly installed on the shaft of the lifting shaft; the two chambers are connected by a horizontal spiral; the mixing shaft is a hollow shaft, and the mixing shaft is connected to the dosing tank.

[0005] In the above patented technologies, firstly, the feed is screened by a screen, the screening efficiency is low and the screen is easily blocked; secondly, the integration of the screening process and the stirring process requires more space; thirdly, the stirring shaft and the lifting shaft are both hollow shafts, and the stirring rod is also a hollow rod body, the interior of the disc and the lifting spiral is a cavity structure, and a number of spray holes are evenly distributed on both sides of the disc and the lifting spiral. The above structure can easily cause the stirring shaft, the lifting shaft, the stirring rod, and the lifting spiral to break under long-term soil pressure. At the same time, the spray holes are easily blocked under soil squeezing, thereby affecting the repair effect; the four side discharge ports may cause the soil to be unable to be completely discharged.

[0006] The patent specification with publication number CN 108188167 A discloses a stirring type soil pollution circulation treatment device, including a processing shell and a circulation shell, a circulation shell is provided on the right side of the processing shell, a feed pipe and a stirring pipe are provided on the processing shell, a stirring rod, stirring fins and scales are provided on the stirring pipe, a lifting shaft, a spiral blade, a filter plate and a drain port are provided on the upper end of the circulation shell, a circulation outlet and a circulation inlet are provided between the processing shell and the circulation shell, a discharge pipe is provided on the right wall of the circulation shell, a valve is provided on the discharge pipe, a motor is riveted on the right side of the upper end of the circulation shell, support rods are symmetrically and vertically welded on the left side of the lower end of the processing shell and the right side of the lower end of the circulation shell, and a non-slip base is connected to the lower end of the support rod.

[0007] In the above-mentioned patented technology, the more complex double-chamber structure and the circulation outlet and circulation inlet may cause difficulty in the movement of soil in the device, resulting in low treatment efficiency; at the same time, as in the CN107321253A patented technology, the through holes on the mixing pipe are easily blocked under the squeezing of the soil, thereby affecting the repair effect.

[0008] The existing technology has problems such as easy clogging of the reagent opening, low soil treatment efficiency due to complex or irregular shapes of the mixing chamber, and low intelligent automation of the equipment. At the same time, considering that the materials of the parts in contact with the contaminated soil are less wear-resistant, corrosion-resistant, and resistant to strong oxidation. In view of the above problems, the present invention provides an efficient and intelligent ex situ soil remediation treatment device. Summary of the invention

[0009] In view of the above-mentioned technical problems and the shortcomings in the art, the present invention provides an ex situ soil remediation treatment device, which can perform ex situ soil remediation treatment efficiently, intelligently and without blind spots.

[0010] An ex situ soil remediation treatment device, characterized by comprising:

[0011] The mixing chamber is composed of a top surface, a bottom surface, two arc-shaped side surfaces and two end surfaces; the inner wall of the mixing chamber is paved with a small lining plate of alloy material and smooth surface, a feed hopper is arranged in the center of the top surface, and a discharge port with a discharge valve is arranged on the bottom surface; a plurality of sprayers for adding medicine are arranged around the feed hopper on the top surface of the mixing chamber; a plurality of spray holes with spray valve plates are arranged on the sprayers; a downward slope is formed on the bottom surface of the mixing chamber from the bottom ends of the two end surfaces to the discharge port; a plurality of weighing components are arranged on the slope; the weighing component includes a weighing sensor and a cushion layer for fixing and connecting the weighing sensor and the slope and keeping the weighing sensor level;

[0012] Two stirring shafts, one above and one below, are arranged transversely in the stirring chamber and are located on two parallel vertical planes and rotate in opposite directions. One end of the stirring shaft is connected to a stirring reduction motor fixed to the outer wall of one end surface of the stirring chamber, and the other end is fixed to the inner wall of the other end surface of the stirring chamber. A double-helical stirring arm is welded on the stirring shaft. A plurality of parallel blades are arranged between the double-helical stirring arm and the stirring shaft.

[0013] 8 stirring forks are respectively arranged on the inner end face, the arc-shaped side face and the top face of the stirring chamber, or at the connection between the end face, the arc-shaped side face and the bottom face; the stirring fork comprises a retractable self-rotating shaft connected at one end to a stirring fork motor fixed to the outer wall of the end face of the stirring chamber, and a stirring arm connected to the other end of the self-rotating shaft; the stirring arm of the stirring fork can stir under the rotation of the self-rotating shaft, and moves simultaneously with the stirring shaft;

[0014] A plurality of humidity sensors are arranged on the end surface of the mixing chamber and between the upper and lower mixing shafts, and are used to measure the moisture content of the soil;

[0015] An intelligent control panel, electrically connected to the feed hopper, the stirring reduction motor, the spray valve plate, the humidity sensor, the weighing sensor, the stirring fork motor, and the discharge valve;

[0016] The stirring shaft, the double-helix stirring arm, the blade, the spray valve plate, the stirring fork, and the discharge valve are all treated with alloy coating at the contacting parts with the soil.

[0017] The device of the present invention promotes the contaminated soil to complete multi-track movement in the double-helix stirring arm through the opposite direction movement of the double stirring shafts in the stirring chamber. The movement design of 8 stirring forks can break up the soil accumulated in the dead corners to prevent its deposition, promote the all-round movement of the soil in the stirring chamber without dead corners, and achieve the purpose of efficient mixing and stirring of the contaminated soil and the agent. The scheme of configuring the double-helix stirring arm with a blade can prevent the agglomeration of the soil during the stirring process. The inner wall of the stirring chamber is paved with a small lining plate. The stirring shaft, double-helix stirring arm, blade, spray valve plate, stirring fork, and discharge valve are all treated with alloy coating, which has the effects of wear resistance, corrosion resistance, and oxidation resistance. The intelligent control panel is connected with the feed hopper, stirring reduction motor, sprayer, humidity sensor, weighing sensor, stirring fork motor, and discharge valve by components, and high-precision automatic control from feeding, dispensing, mixing and stirring of agents and contaminated soil to discharging is realized through program coding.

[0018] In a preferred example, in the ex situ soil remediation treatment device, the sprayer is connected to the drug outlet of the drug mixing tank through a delivery pipe and a dosing pump;

[0019] The water inlet of the medicine mixing tank is connected to the water pump through a conduit, and the medicine inlet is connected to the medicine storage box through a medicine flow pipe with a medicine flow valve;

[0020] The intelligent control panel is electrically connected with the dosing pump, the medicine mixing tank, the water pump, the medicine flow valve and the medicine storage box.

[0021] In a preferred example, the ex situ soil remediation and treatment device further comprises a shell, a stirring chamber is arranged in the shell, a base is welded at the bottom of the shell, and a shock-absorbing bracket is symmetrically welded under the base.

[0022] In a preferred example, in the ex situ soil remediation treatment device, the small lining plate is fastened to the inner wall of the mixing chamber by countersunk screws.

[0023] In a preferred example, in the ex situ soil remediation treatment device, the blade is in the shape of a rectangular sheet, one end along the central axis is fixed to the double-helix stirring arm through a first end shaft, and the other end is fixed to the stirring shaft through a second end shaft.

[0024] In a preferred example, the ex situ soil remediation treatment device is fed by belt conveyor or an ALLU bucket in combination with a feed hopper.

[0025] In a preferred example, the slope of the slope of the ex situ soil remediation treatment device is 10% to 30%.

[0026] The present invention also provides an ex situ soil remediation treatment method, using the ex situ soil remediation treatment device;

[0027] The ex situ soil remediation treatment method comprises:

[0028] The contaminated soil to be treated that has been pre-treated by screening enters the mixing chamber through the feed hopper. The weighing sensor and the humidity sensor measure the weight of the contaminated soil to be treated and the soil moisture content. The spray valve is opened to spray the agent into the mixing chamber. The single spraying time is 10 to 20 seconds. The amount of agent added is 0.1% to 10% of the mass of the contaminated soil to be treated. The soil moisture content is controlled at 10% to 65%. After the agent spraying is completed, the spray valve is closed, the stirring reduction motor is turned on to drive the two stirring shafts to rotate in opposite directions, and the stirring fork motor is turned on to drive the stirring fork to stir. The contaminated soil to be treated moves horizontally and up and down in the mixing chamber and is cut and broken by the blade and fully mixed with the agent. The single stirring time is 2 to 5 minutes. The agent spraying and stirring are performed alternately. After the stirring is completed, the discharge valve is opened to discharge the material.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The invention provides an efficient and intelligent ex situ soil remediation treatment device with a high degree of intelligent automation. The intelligent control panel is connected with a feed hopper, a stirring reduction motor, a water pump, a reagent mixing tank, a reagent storage box, a sprinkler, a humidity sensor, a weighing sensor, a stirring fork motor, and a discharge valve. The device is equipped with at least two weighing sensors and at least two humidity sensors. The quality control accuracy of the weighing sensor and the humidity sensor are both within the range of 0.1%. The device can accurately weigh the quality and moisture content of the feed, and set the soil reagent addition ratio, moisture content and other technical parameters through a program, thereby controlling the reagent addition amount and the amount of water.

[0031] The invention provides an efficient and intelligent ex situ soil remediation and treatment device without a screening structure, but only one mixing chamber with two built-in mixing shafts. The double-helix mixing arms configured on the mixing shafts enable the soil to move in the mixing chamber along a sinusoidal trajectory and a left-right circular motion trajectory. Under the soil gravity condition, there is also an up-and-down circular motion trajectory. The multi-track motion enables the soil to be fully stirred in the mixing chamber, achieving the purpose of efficient stirring. At the same time, the blade structure located between the mixing arms can cut the soil during the mixing process, prevent the soil from agglomerating, and further improve the mixing efficiency with the agent.

[0032] Furthermore, the present invention provides a highly efficient and intelligent ex-situ soil remediation and treatment device, in which the stirring fork and the stirring shaft move simultaneously, and the rotating shaft is retractable, so that even the soil located in the blind corner of the stirring chamber can be easily and effectively stirred.

[0033] It only takes 5 to 7 minutes from soil feeding to discharge after the remediation treatment. Each treatment cycle can remediate 1.2 tons of contaminated soil.

[0034] The invention provides an efficient and intelligent ex-situ soil remediation treatment device which can improve soil mixing efficiency, has a fast discharge speed and improves soil remediation treatment efficiency under the premise of simple structure and small footprint.

[0035] The invention provides a highly efficient and intelligent ex situ soil remediation and treatment device. The inner wall of the mixing chamber is paved with a small lining plate, which is made of alloy material, has a smooth surface, and has the functions of wear resistance, corrosion resistance, and strong oxidation resistance; the double-helix stirring arm is made of metal material, and the surface is treated with alloy coating. After treatment, the surface is smooth, and has the functions of wear resistance, strong oxidation resistance, and corrosion resistance. It can effectively avoid the corrosion and oxidation of the device by the agent and the long-term friction of soil and gravel. At the same time, the smooth inner wall and stirring arm can effectively prevent the soil from sticking during the mixing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the front view of the structure of the ex situ soil remediation device of the embodiment;

[0037] Figure 2A schematic diagram of the structure of a double-helix stirring arm and a blade of an ex situ soil remediation device according to an embodiment;

[0038] Figure 3 A schematic diagram of the structure of a weighing sensor and a cushion layer of an ex situ soil remediation device of an embodiment;

[0039] Figure 4 A schematic diagram of the structure of a sprinkler of an ex situ soil remediation device according to an embodiment;

[0040] Figure 5 A schematic diagram of the structure and arrangement of a small liner of an ex situ soil remediation treatment device of an embodiment;

[0041] Figure 6 It is a side structural schematic diagram of an ex situ soil remediation treatment device according to an embodiment. DETAILED DESCRIPTION

[0042] The present invention will be further described below in conjunction with the accompanying drawings and specific examples. It should be understood that these examples are only intended to illustrate the present invention and are not intended to limit the scope of the present invention. The operating methods in the following examples without specifying specific conditions are usually carried out under conventional conditions or under conditions recommended by the manufacturer.

[0043] See also Figure 1 The ex situ soil remediation treatment device of this embodiment includes a mixing chamber 4 and a shell 3. The mixing chamber 4 is arranged in the shell 3. A base 1 is welded at the bottom of the shell 3. A shock-absorbing bracket 2 is symmetrically welded under the base 1.

[0044] The stirring chamber 4 is composed of a top surface, a bottom surface, two arc-shaped side surfaces and two end surfaces.

[0045] See also Figure 5 The inner wall of the mixing chamber 4 is paved with a small lining plate 41 made of alloy material and having a smooth surface. The small lining plate 41 is fastened to the inner wall of the mixing chamber 4 by countersunk screws 42.

[0046] See also Figure 1 The bottom surface of the mixing chamber 4 is provided with a discharge port 20 with a discharge valve; the bottom surface of the mixing chamber 4 forms a downward slope 43 from the bottom ends of the two end surfaces to the discharge port 20. The slope of the slope 43 can be designed to be 10% to 30% to facilitate discharge. Two weighing sensors 191 and 192 are provided on the slope 43, and a cushion layer 193 for fixing and connecting the weighing sensors 191 and 192 and the slope 43 and keeping the weighing sensors 191 and 192 level is provided. The thickness of the cushion layer on both sides can be adjusted according to the slope of the slope 43. For details, please refer to Figure 3 The weighing sensor quality control accuracy is within 0.1%.

[0047] See also Figure 1A feed hopper 12 of an inverted trapezoidal structure is arranged at the center of the top surface of the mixing chamber 4. The feeding of the ex situ soil remediation treatment device of this embodiment can be carried out by belt conveyor or ALLU bucket in combination with the feed hopper 12, which is convenient for construction, strong in operability, simplifies the screening process, and can improve the treatment efficiency of the device.

[0048] See also Figure 1 , two sprayers 10 for dosing are arranged around the feed hopper 12 on the top surface of the mixing chamber 4. The sprayers 10 are connected to the drug outlet of the drug mixing tank 15 through the delivery pipe 11 and the dosing pump 14; the water inlet of the drug mixing tank 15 is connected to the water pump 17 through the conduit 16, and the drug inlet is connected to the drug storage box 131 through the drug flow pipe 132 with a drug flow valve. Figure 4 The sprinkler 10 is provided with a plurality of sprinkler holes 101 with sprinkler valve plates 102 .

[0049] See also Figure 1 Two stirring shafts 61 and 62 are arranged in the stirring chamber 4, which are symmetrical in the vertical direction and rotate in opposite directions. The stirring shafts 61 and 62 are respectively located on two parallel vertical planes, and one end of each is connected to the stirring reduction motor 51 and 52 fixed to one end of the stirring chamber 4, and the other end is fixed to the other end of the stirring chamber 4. Double helical stirring arms 7 are welded on the stirring shafts 61 and 62, and the double helical stirring arms 7 are distributed in a sine curve. The welding positions are as follows: Figure 1 As shown in A in FIG. A plurality of parallel blades 8 are arranged between the double helical stirring arm 7 and the stirring shafts 61 and 62. Figure 2 Taking the stirring shaft 62 as an example, the blade 8 is a rectangular sheet, one end of which along the central axis is fixed to the double-helix stirring arm 7 through the first end shaft 81, and the other end is fixed to the stirring shaft 62 through the second end shaft 82, so that the soil and the mixed liquid of the agent are fully mixed, stirred, cut and crushed in the multi-track motion, greatly improving the processing efficiency of the device.

[0050] See also Figure 1 , Figure 6 The stirring fork motor 22 is fixed to the outer wall of the end face of the stirring chamber 4 and is connected to the stirring fork 9 in a one-to-one correspondence. There are 8 stirring forks 9 in total, which are arranged at the inner end face, the curved side face and the top face, or the connection between the end face, the curved side face and the bottom face of the stirring chamber 4. The stirring fork 9 forms an angle of 45 degrees with the end face of the stirring chamber 4. The stirring fork 9 includes a retractable rotating shaft connected to the stirring fork motor 22 at one end and a stirring arm connected to the other end of the rotating shaft. The distance between the stirring arm and the rotating surface of the nearest double-helix stirring arm 7 is 10 to 15 cm. The stirring arm of the stirring fork 9 can be stirred under the rotation of the rotating shaft, and moves simultaneously with the stirring shafts 61 and 62. The rotating shaft is retractable, so that even the soil located in the dead corner of the stirring chamber 4 can be easily and effectively stirred.

[0051] See also Figure 1Two humidity sensors 181, 182 are arranged on the end surface of the mixing chamber 4 and located between the upper and lower mixing shafts 61, 62, and are used to measure the soil moisture content. The control accuracy of the humidity sensor is within the range of 0.1%.

[0052] The feed hopper 12, the stirring reduction motors 51 and 52, the stirring fork motor 22, the spray valve plate 102, the humidity sensors 181 and 182, the weighing sensors 191 and 192, the discharge valve, the dosing pump 14, the agent mixing tank 15, the water pump 17, the agent flow valve and the agent storage box 131 are all electrically connected to the intelligent control panel 21. High-precision automatic control from feeding, dispensing, mixing and stirring of agents and contaminated soil to discharging is achieved through program coding.

[0053] The stirring shafts 61, 62, the double-helix stirring arms 7, the blades 8, the spray valve plate 102, the stirring fork 9 and the parts of the discharge valve in contact with the soil are all treated with alloy coating, which has the effects of wear resistance, corrosion resistance and oxidation resistance.

[0054] The ex situ soil remediation treatment device of this embodiment is used for ex situ soil remediation treatment. It only takes 5 to 7 minutes from the feeding of the treated soil to the discharge of the treated soil after the remediation treatment. Each treatment cycle can repair and treat 1.2 tons of contaminated soil. It is easy to operate, has a high degree of automation, a small error, and efficient treatment.

[0055] The specific operation process includes:

[0056] The contaminated soil to be treated that has been pre-treated by ALLU bucket screening enters the mixing chamber 4 through the feed hopper 12, and the weighing sensors 191, 192 and the humidity sensors 181, 182 measure the weight and soil moisture content of the contaminated soil to be treated, and the data are transmitted to the intelligent control panel 21 through electronic components, and the program sets parameters; the weight of the contaminated soil to be treated is the average value of the weighing sensors 191, 192, and the soil moisture content is the average value of the humidity sensors 181, 182, the amount of the agent added is 0.1% to 10% of the mass of the contaminated soil to be treated, and the soil moisture content is controlled at 10% to 65%.

[0057] According to the amount of reagent added and moisture content set by the project technical parameters, combined with the average mass and average moisture content of the contaminated soil to be treated measured by weighing sensors 191, 192 and humidity sensors 181, 182, the required dry powder mass of stabilizing agent / chemical reduction agent and the mass of water are calculated, and the digital signal is transmitted to the reagent storage box 131 and the water pump 17. The reagent storage box 131 absorbs the corresponding mass of dry powder reagent through the reagent flow tube 132, and the valve in contact with the reagent mixing tank 15 is automatically opened, and the dry powder reagent enters the reagent mixing tank 15. After the drug feeding is completed, the water pump 17 pumps the corresponding mass of water into the reagent mixing tank 15 through the conduit 16, and the mixing time is set to 30s~1min.

[0058] After the dry powder agent is mixed with water, it is pumped to the delivery pipe 11 through the dosing pump 14 and enters the two sprayers 10 through the delivery pipe 11. The spray valve plate 102 is opened to spray the agent into the mixing chamber 4. The single spraying time is 10 to 20 seconds. After the agent spraying is completed, the spray valve plate 102 is closed. The stirring reduction motors 51 and 52 are turned on to drive the two stirring shafts 61 and 62 to rotate in opposite directions. At the same time, the stirring fork motor 22 is turned on. The stirring fork motor 22 drives the stirring fork 9 to start retracting and rotating. The contaminated soil to be treated reciprocates left and right and up and down in the mixing chamber 4 and is cut and broken by the blade 8. The soil in the corner is stirred by the stirring fork 9 and fully mixed with the agent. The single stirring time is 2 to 5 minutes. The agent spraying and stirring are performed alternately. The spraying stops and stirring is performed. The stirring stops and the spraying stops. This can effectively ensure that the agent mixture and the soil to be treated are mixed evenly and fully. After the stirring is completed, the discharge valve is opened to discharge the material. The discharge time is set to 30 seconds to 1 minute.

[0059] In addition, it should be understood that after reading the above description of the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. An ex situ soil remediation treatment device, It is characterized in that include: The mixing chamber (4) is composed of a top surface, a bottom surface, two arc-shaped side surfaces and two end surfaces; the inner wall of the mixing chamber (4) is paved with a small lining plate (41) made of alloy material and having a smooth surface; a feed hopper (12) is arranged at the center of the top surface; and a discharge port (20) with a discharge valve is arranged on the bottom surface; a plurality of sprayers (10) for adding medicine are arranged around the feed hopper (12) on the top surface of the mixing chamber (4); a plurality of spray holes (101) with spray valve plates (102) are arranged on the sprayers (10); a downward inclined surface (43) is formed on the bottom surface of the mixing chamber (4) from the bottom ends of the two end surfaces to the discharge port (20); a plurality of weighing components are arranged on the inclined surface (43); the weighing components include a weighing sensor and a cushion layer (193) for fixing the weighing sensor and the inclined surface (43) and keeping the weighing sensor horizontal; Two stirring shafts, one above and one below, are arranged transversely in a stirring chamber (4) and are located on two parallel vertical planes and rotate in opposite directions; one end of the stirring shaft is connected to a stirring reduction motor fixed to the outer wall of one end surface of the stirring chamber (4), and the other end is fixed to the inner wall of the other end surface of the stirring chamber (4); a double helical stirring arm (7) is welded to the stirring shaft, and the double helical stirring arm (7) is distributed in a sine curve; a plurality of blades (8) arranged in parallel are arranged between the double helical stirring arm (7) and the stirring shaft; the blade (8) is in the shape of a rectangular sheet, one end of which along the central axis is fixed to the double helical stirring arm (7) via a first end shaft (81), and the other end is fixed to the stirring shaft via a second end shaft (82); the contaminated soil to be treated reciprocates horizontally and up and down in the stirring chamber (4) and is cut and crushed by the blade (8); The double-helix stirring arm (7) configured on the stirring shaft enables the soil to move in the stirring chamber (4) along a sinusoidal trajectory and a left-right circular motion trajectory, and also along an up-and-down circular motion trajectory under soil gravity conditions. The multi-trajectory motion enables the soil to be fully stirred in the stirring chamber (4); Eight stirring forks (9) are respectively arranged at the connection between the end surface, the arc-shaped side surface and the bottom surface; the stirring fork (9) forms an angle of 45 degrees with the end surface of the stirring chamber (4); the stirring fork (9) comprises a retractable self-rotating shaft connected at one end to a stirring fork motor (22) fixed to the outer wall of the end surface of the stirring chamber (4) and a stirring arm connected to the other end of the self-rotating shaft, and the distance between the stirring arm and the nearest rotating surface of the double-helix stirring arm (7) is 10 to 15 cm; the stirring arm of the stirring fork (9) can be driven by the rotation of the self-rotating shaft to stir, and moves simultaneously with the stirring shaft; The stirring shaft, the double-helix stirring arm (7), the blade (8), the spray valve plate (102), the stirring fork (9), and the discharge valve are all treated with alloy coating at the locations in contact with the soil.

2. The ex situ soil remediation treatment device according to claim 1, It is characterized in that The ex situ soil remediation device further comprises an intelligent control panel (21) and a plurality of humidity sensors; the plurality of humidity sensors are arranged on the end surface of the stirring chamber (4) and between the upper and lower stirring shafts, and are used to measure the soil moisture content; the intelligent control panel (21) is electrically connected to the feed hopper (12), the stirring reduction motor, the spray valve plate (102), the humidity sensor, the weighing sensor, the stirring fork motor (22), and the discharge valve; The sprayer (10) is connected to the medicine outlet of the medicine mixing tank (15) through a delivery pipe (11) and a medicine adding pump (14); The water inlet of the medicine mixing tank (15) is connected to the water pump (17) via a conduit (16), and the medicine inlet is connected to the medicine storage box (131) via a medicine flow tube (132) with a medicine flow valve; The intelligent control panel (21) is electrically connected to the dosing pump (14), the medicine mixing tank (15), the water pump (17), the medicine flow valve, and the medicine storage box (131).

3. The ex situ soil remediation treatment device according to claim 1, It is characterized in that The ex situ soil remediation treatment device further comprises a housing (3), a stirring chamber (4) being arranged inside the housing (3), a base (1) being welded to the bottom of the housing (3), and a shock-absorbing bracket (2) being symmetrically welded below the base (1).

4. The ex situ soil remediation treatment device according to claim 1, It is characterized in that The small lining plate (41) is fastened to the inner wall of the mixing chamber (4) by means of countersunk screws (42).

5. The ex situ soil remediation treatment device according to claim 1, It is characterized in that The ex-situ soil remediation treatment device is fed by belt conveyor or an ALLU bucket in combination with a feed hopper (12).

6. The ex situ soil remediation treatment device according to claim 1, It is characterized in that The slope of the inclined surface (43) is 10% to 30%.

7. An ex situ soil remediation treatment method, It is characterized in that Using the ex situ soil remediation treatment device according to claim 2; The ex situ soil remediation treatment method comprises: The contaminated soil to be treated that has been pre-treated by screening enters the mixing chamber (4) through the feed hopper (12). The weighing sensor and the humidity sensor measure the weight of the contaminated soil to be treated and the soil moisture content. The spray valve (102) is opened to spray the agent into the mixing chamber (4). The single spraying time is 10 to 20 seconds. The amount of agent added is 0.1% to 10% of the mass of the contaminated soil to be treated. The soil moisture content is 10% to 65%. After the agent spraying is completed, the spray valve (102) is closed, the stirring reduction motor is turned on to drive the two stirring shafts to rotate in opposite directions, and the stirring fork motor (22) is turned on to drive the stirring fork (9) to stir. The contaminated soil to be treated moves horizontally and up and down in the mixing chamber (4) and is cut and broken by the blade (8) to be fully mixed with the agent. The single stirring time is 2 to 5 minutes. The agent spraying and stirring are performed alternately. After the stirring is completed, the discharge valve is opened to discharge the material.

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