Efficient mixing system for reducing dosage of dewatering pretreatment agent for polluted soil

Abstract

The utility model relates to the field of polluted soil pretreatment, and discloses an efficient mixing system for reducing the dosage of a polluted soil dehydration pretreatment agent, which comprises a pretreatment tower, a packaging structure, a control structure and a volatile organic pollutant absorption tower, the top surface of the pretreatment tower is provided with a polluted soil adding port and a pretreatment agent adding port, and the pretreatment tower is sequentially provided with a preliminary mixing layer, a full mixing layer and a packaging buffer layer from top to bottom; an electric heating plate is arranged between the bottom of the sufficient mixing layer and the packaging buffer layer, a stirrer is arranged above the electric heating plate, and a volatile organic pollutant detector and a moisture meter which are electrically connected with the control structure are arranged in the sufficient mixing layer; a pressure generator with a soil discharge outlet is arranged at the bottom of the packaging buffer layer, and a packaging structure and a transport vehicle are sequentially arranged below the pressure generator. According to the utility model, the purpose of reducing volatile organic pollutants can be achieved while the consumption of the pretreating agent is reduced, and the continuous optimization of the pretreatment process of the cement kiln co-processing technology is promoted.

Description

Technical Field

[0001] The utility model relates to the technical field of contaminated soil pretreatment, in particular to a high-efficiency mixing system for reducing the amount of a contaminated soil dehydration pretreatment agent. Background Art

[0002] Cement kiln coordinated disposal technology is one of the most widely used heavy metal contaminated soil remediation technologies in my country. It is a process in which the contaminated soil is excavated and pre-treated at the contaminated site so that the soil moisture content meets the kiln entry requirements. The soil is then transported to the cement plant and put into the cement kiln. During the clinker calcination process, the contaminated soil is simultaneously disposed of harmlessly.

[0003] One of the most widely used methods for controlling the moisture content of contaminated soil is to add pretreatment agents such as quicklime to the soil and stir it to fully mix the pretreatment agents such as quicklime with the contaminated soil, thereby reducing the moisture content of the contaminated soil to below the limit required for entering the kiln. However, the existing mixing methods are mostly manual mixing with excavators or shovels, which have the disadvantages of large dosage of agents, high cost, insufficient mixing, low efficiency, low accuracy of moisture monitoring, and for soils contaminated with heavy metals and volatile pollutants, this mixing method is prone to leakage of volatile organic compounds. At the same time, a large amount of dust will be generated during the addition of pretreatment agents, causing multiple pollution to the surrounding environment. Utility Model Content

[0004] The utility model provides an efficient mixing system for reducing the amount of pretreatment agent used for dehydrating contaminated soil, which can reduce the amount of pretreatment agent used while achieving the purpose of reducing volatile organic pollutants, promote the continuous optimization of the pretreatment process of cement kiln collaborative disposal technology, and realize resource utilization, cost minimization and environmental protection principles.

[0005] The utility model provides a high-efficiency mixing system for reducing the amount of polluted soil dehydration pretreatment agent, including a pretreatment tower, a packaging structure, a control structure and a volatile organic pollutant absorption tower;

[0006] The top surface of the pretreatment tower is provided with a contaminated soil inlet, the top of the side of the pretreatment tower is provided with a pretreatment agent inlet, and a quantitative blower is provided inside the pretreatment agent inlet, and the quantitative blower is electrically connected to the control structure; the pretreatment tower is provided with a preliminary mixing layer, a sufficient mixing layer and a packing buffer layer from top to bottom;

[0007] A first blocking and isolating telescopic plate is provided at the junction between the top of the preliminary mixing layer and the contaminated soil inlet, and a second blocking and isolating telescopic plate is provided at the junction between the bottom of the preliminary mixing layer and the fully mixed layer;

[0008] An electric heating plate is arranged at the junction of the bottom of the fully mixed layer and the packing buffer layer, a stirrer is arranged above the electric heating plate, a volatile organic pollutant detector is arranged inside the fully mixed layer, the volatile organic pollutant detector is electrically connected to the control structure, and the volatile organic pollutant absorption tower and moisture meter are arranged outside the fully mixed layer, and the moisture meter is electrically connected to the control interface;

[0009] A pressure generator is arranged at the bottom of the packing buffer layer, the pressure generator is connected to the agitator, a soil discharge port is arranged in the middle of the pressure generator, a separation structure is connected to the top of the packing buffer layer, a packing structure is arranged below the pressure generator, and a transport vehicle is arranged below the packing structure.

[0010] Furthermore, the control structure includes a controller and multiple cables, the controller is connected to the electric heating plate through a first cable, the controller is connected to the moisture meter through a second cable, the controller is connected to the volatile organic pollutant detector through a third cable, the controller is connected to the first blocking isolation telescopic plate through a fifth cable, the controller is connected to the second blocking isolation telescopic plate through a fourth cable, and the controller is connected to the quantitative hair dryer through a sixth cable.

[0011] Furthermore, the first blocking isolation telescopic plate and the second blocking isolation telescopic plate are in opposite open and closed states, that is, the first blocking isolation telescopic plate is opened while the second blocking isolation telescopic plate is closed, and the first blocking isolation telescopic plate is closed while the second blocking isolation telescopic plate is opened.

[0012] Furthermore, the electric heating plate is composed of a plurality of support rods and branch leaves, the support rods are fixedly connected to the inner wall of the pretreatment tower, the branch leaves are movably connected to the support rods, and the branch leaves can be parallel to the support rods after being merged. At this time, the electric heating plate is in an open state, and the soil in the fully mixed layer can fall into the packing buffer layer; the branch leaves can also be opened and arranged vertically with the support rods in a horizontal plane. At this time, the electric heating plate is in a closed state, and the soil in the fully mixed layer cannot fall.

[0013] Furthermore, a volatile organic pollutant absorption port and a moisture measuring port are provided inside the fully mixed layer, the volatile organic pollutant absorption port is connected to the volatile organic pollutant absorption tower through an air inlet pipe, and the moisture measuring port is used to insert a moisture meter.

[0014] Furthermore, a rotating shaft is provided in the middle of the agitator, and a first soil receiver and a second soil receiver are welded to the upper and lower sides of the agitator respectively, and the first soil receiver and the second soil receiver are in the shape of long strip-shaped grooves; the pressure generator is connected to the rotating shafts of the electric heating plate and the agitator through the first wire and the second wire respectively, and the electric energy generated by the pressure generator provides power for the electric heating plate and the agitator, and the pressure generator is distributed in an inverted frustum shape.

[0015] Furthermore, the first wire and the second wire are both connected to a power supply at the construction site, so that the electric heating plate is heated through the first wire under the action of the power supply at the construction site, and the rotating shaft is rotated through the second wire.

[0016] Furthermore, the separation structure includes a first separation plate and a second separation plate, both of which are arranged at the bottom of the electric heating plate and are distributed in an inverted V shape at a set angle to prevent the soil of the fully mixed layer from falling directly into the soil discharge port.

[0017] Furthermore, the packaging structure includes a hanging rod, a packaging bag support frame and a drawstring type packaging bag. The hanging rod is arranged at the bottom of the pretreatment tower and is fixedly connected to the pretreatment tower. The hanging rod is distributed in an L shape. The L-shaped horizontal part of the hanging rod is welded with a packaging bag support frame. The middle part of the long side of the packaging bag support frame is not connected, which is convenient for the drawstring of the drawstring type packaging bag to be drawn in and out. The drawstring type packaging bag maintains a set distance from the soil discharge port.

[0018] Furthermore, the pretreatment tower is in the shape of a column shell, and the packing bag support frame is in the shape of a rectangular frame.

[0019] The beneficial effects of the utility model are:

[0020] The utility model can realize efficient mixing of contaminated soil and pretreatment agent, and can utilize resource-based methods to achieve the purpose of reducing the amount of soil dehydration pretreatment agent used, greatly reducing the input of agents, machinery and labor resources, and thus reducing operating costs, and solves the problems of high cost, low efficiency, insufficient mixing, low accuracy of moisture monitoring, and a large amount of dust generated during the process of adding pretreatment agents that easily pollutes the environment in the existing soil dehydration pretreatment technology. At the same time, for soil contaminated with heavy metals and volatile organic pollutants, it can achieve the dual purpose of simultaneously reducing the amount of volatile organic pollutants in the soil and the amount of soil dehydration pretreatment agent used, effectively preventing the leakage of volatile organic pollutants during the pretreatment process and the dust generated during the addition of pretreatment agents from polluting the surrounding environment, and can promote the continuous optimization of the pretreatment process of contaminated soil by cement kiln collaborative disposal technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1This is a schematic diagram of the overall structure of the high-efficiency mixing system for reducing the amount of dehydration pretreatment agent used in contaminated soil according to the utility model.

[0022] Figure 2 It is a top view of the electric heating plate in the utility model in the open state.

[0023] Figure 3 It is a top view of the electric heating plate in the closed state in the utility model.

[0024] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings.

[0025] In the attached drawings, there are a contaminated soil inlet 1, a pretreatment agent inlet 2, a quantitative blower 3, a first blocking isolation telescopic plate 41, a second blocking isolation telescopic plate 42, soil particles 5, a pretreatment tower 6, a first cable 71, a second cable 72, a third cable 73, a fourth cable 74, a fifth cable 75, a sixth cable 76, a controller 8, a volatile organic pollutant absorption tower 9, a preliminary mixing layer 10, a fully mixed layer 11, a stirrer 12, a first soil receiver 131, a second soil receiver 132, and a rotating shaft 1 4. Electric heating plate 15, volatile organic pollutant detector 16, moisture measuring port 17, moisture measuring instrument 18, first conducting wire 191, second conducting wire 192, packing buffer layer 20, pressure generator 21, hanging rod 22, packing bag support frame 23, drawstring packing bag 24, transport vehicle 25, construction site power supply 26, support rod 27, branch leaf 28, volatile organic pollutant absorption port 29, air intake pipe 30, soil discharge port 31, first separation plate 321, second separation plate 322, drawstring 33. DETAILED DESCRIPTION

[0026] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] like Figure 1 As shown, the utility model provides an efficient mixing system for reducing the amount of pretreatment agent used for dehydration of contaminated soil. The efficient mixing system includes a pretreatment tower 6 and its supporting system. The pretreatment tower 6 includes a contaminated soil addition port 1, a pretreatment agent addition port 2, a preliminary mixing layer 10, a sufficient mixing layer 11 and a packing buffer layer 20. The supporting system includes a packing structure, a control structure and a volatile organic pollutant absorption tower 9. The control structure includes a controller 8 and multiple cables.

[0028] A quantitative blower 3 is provided inside the pretreatment agent addition port 2, and the quantitative blower 3 is connected to the controller 8 through the sixth cable 76. During the implementation process, the quantitative blower 3 is turned on and off by the controller 8; a first blocking isolation telescopic plate 41 is provided on the top of the preliminary mixing layer 10, and a second blocking isolation telescopic plate 42 is provided at the bottom of the preliminary mixing layer 10. The first blocking isolation telescopic plate 41 and the second blocking isolation telescopic plate 42 are connected to the controller 8 through the fifth cable 75 and the fourth cable 74 respectively. During the specific implementation process, the first blocking isolation telescopic plate 41 and the second blocking isolation telescopic plate 42 are opened and closed by the controller 8, and the opening and closing states of the first blocking isolation telescopic plate 41 and the second blocking isolation telescopic plate 42 are opposite, that is, the first blocking isolation telescopic plate 41 is opened while the second blocking isolation telescopic plate 42 is closed, and the first blocking isolation telescopic plate 41 is closed while the second blocking isolation telescopic plate 42 is opened.

[0029] like Figure 1-3 As shown, the top of the fully mixed layer 11 is a second blocking isolation telescopic plate 42, and the bottom of the fully mixed layer 11 is provided with an electric heating plate 15, and the electric heating plate 15 includes a plurality of support rods 27 and branch leaves 28, wherein the support rods 27 are fixedly connected to the inner wall of the pretreatment tower, and the branch leaves 28 are movably connected to the support rods 27. During the implementation process, the branch leaves 28 can be merged and parallel to the support rods 27. At this time, the electric heating plate 15 is in an open state, and the soil in the fully mixed layer 11 can fall into the packing buffer layer; the branch leaves 28 can also be opened and arranged vertically with the support rods 27 in a horizontal plane. At this time, the electric heating plate 15 is in a closed state, and the soil in the fully mixed layer 11 cannot fall.

[0030] A stirrer 12 is provided at a certain distance near the electric heating plate 15, and a rotating shaft 14 is provided in the middle of the stirrer 12. A first soil receiver 131 and a second soil receiver 132 are welded on the upper and lower sides respectively. The first soil receiver 131 and the second soil receiver 132 are preferably shaped like long strip-shaped grooves. A volatile organic pollutant detector (FID) 16 is provided on the inner side of the fully mixed layer 11 near the controller 8. The volatile organic pollutant detector (FID) 16 is provided at a certain distance above the upper edge of the first soil receiver 131 of the stirrer 12. The volatile organic pollutant detector (FID) 16 is connected to the controller 8 through a third cable 73, and the volatile organic pollutant detector (FID) 16 is opened and closed by the controller 8.

[0031] A volatile organic pollutant absorption port 29 and a moisture measuring port 17 are provided on the inner side of the fully mixed layer 11. The volatile organic pollutant absorption port 29 is equipped with a volatile organic pollutant absorption tower 9. The two are connected by an air inlet pipe 30 and are used to absorb volatile organic pollutants and evaporated moisture in the soil. The moisture measuring port 17 is used to insert a moisture meter 18. The moisture meter 18 is connected to the controller 8 through a second cable 72. The data measured by the moisture meter 18 will be transmitted to the controller 8 in real time. The controller 8 determines whether the soil moisture content reaches the required limit based on the data measured by the moisture meter 18. After the moisture content limit requirement is reached, the controller 8 merges the branch leaves 28 of the electric heating plate 5 to be parallel to the support rod 27, and the soil falls into the packing buffer layer 20. After the soil falls into the packing buffer layer 20, the controller 8 opens the branch leaves 28 of the electric heating plate 5 to be perpendicular to the support rod 27, which is convenient for the pretreatment of the next batch of soil, and the cycle is repeated.

[0032] like Figure 1 As shown, the top of the packing buffer layer 20 is an electric heating plate 15, and the bottom is a pressure generator 21. The pressure generator 21 is connected to the electric heating plate 15 and the rotating shaft 14 of the agitator 12 through a first wire 191 and a second wire 192 respectively. During the implementation process, the electric energy generated by the pressure generator 21 provides power for the electric heating plate 15 and the agitator 12. A soil discharge port 31 is provided in the middle of the pressure generator 21. Preferably, the pressure generator 21 is distributed in an inverted frustum shape.

[0033] The top of the packing buffer layer 20 is connected to a first separation plate 321 and a second separation plate 322. The first separation plate 321 and the second separation plate 322 are both arranged at the bottom of the electric heating plate 15 and are distributed in a small-angle inverted V shape to prevent soil from part of the fully mixed layer 11 from falling directly into the soil discharge port 13, and to facilitate the soil that falls from the fully mixed layer 11 to fall onto the pressure generator 21 first and then be discharged from the soil discharge port 13.

[0034] The packing structure includes a hanging rod 22, a packing bag support frame 23 and a drawstring packing bag 24. The hanging rod 22 is arranged at the bottom of the pretreatment tower 6 and is fixedly connected to the pretreatment tower 6. The hanging rod 22 is L-shaped, and the L-shaped horizontal part of the hanging rod 22 is welded with the packing bag support frame 23. Preferably, the pretreatment tower 6 is in the shape of a column shell, and the packing bag support frame 23 is in the shape of a rectangular frame. The middle part of the long side of the packing bag support frame 23 is not connected, which is convenient for the drawstring 33 of the drawstring packing bag 24 to enter and exit. The drawstring packing bag 24 maintains a certain distance from the soil discharge port 31. In the specific operation process, after the drawstring packing bag 24 is full, a construction machine such as a forklift is used to tighten the drawstring 33, so that the drawstring 33 passes through the unconnected part of the packing bag support frame 23 and is placed in the carriage of the transport vehicle 25. After the carriage of the transport vehicle 25 is full, it is transported to the cement kiln.

[0035] The specific operation method of the utility model is as follows: first, the measured moisture content value of the excavated original soil is input into the controller 8, and the contaminated soil is quantitatively added to the contaminated soil adding port 1. At this time, the controller 8 closes the first blocking isolation telescopic plate 41 and opens the second blocking isolation telescopic plate 42 through the fifth cable 75 and the fourth cable 74 respectively. After the quantitative addition of the contaminated soil is completed, the controller 8 opens the first blocking isolation telescopic plate 41 and closes the second blocking isolation telescopic plate 42 through the fifth cable 75 and the fourth cable 74 respectively, and turns on the quantitative blower 3 through the sixth cable 76. When the soil particles 5 fall into the preliminary mixing layer 10, the pretreatment agent is blown in by the quantitative blower 3 to perform preliminary mixing of the soil particles 5 and the dehydration pretreatment agent. Then, the controller 8 closes the first blocking isolation telescopic plate 41 and opens the second blocking isolation telescopic plate 42 through the fifth cable 75 and the fourth cable 74, and the soil particles 5 in the preliminary mixing layer 10 fall into the fully mixed layer 11.

[0036] Secondly, in the fully mixed layer 11, the soil particles 5 fall into the first soil receiving trough 131, and the kinetic energy of the fall causes the first soil receiving trough 131 to move downward, and the received soil falls on the electric heating plate. At this time, the rotating shaft 14 rotates, and the second soil receiving trough 132 moves upward. After receiving the soil, the same process as the first soil receiving trough 131 is repeated until the first batch of quantitative soil falls in, and then the power supply is used to keep the agitator 12 moving, so that the contaminated soil is stirred by the agitator 12 to achieve the purpose of full mixing. After the soil particles 5 of the preliminary mixed layer 10 completely fall into the fully mixed layer 11, the controller 8 opens the first blocking isolation telescopic plate 41 and closes the second blocking isolation telescopic plate 42 through the fifth cable 75 and the fourth cable 74. The soil particles 5 that fall into the fully mixed layer 11 for the first time rotate the rotating shaft 14 through the second wire 192 under the action of the power supply 26 at the construction site, thereby causing the agitator 12 to stir. The mixer 12 performs the stirring operation, and at the same time, the electric heating plate 15 is heated through the first wire 191 under the action of the power supply 26 of the construction site, so that the soil particles 5 are stirred and heated at the same time, which can simultaneously achieve the purpose of full mixing and evaporation of moisture and volatile pollutants in the soil. The evaporated moisture and volatile pollutants can enter the volatile organic pollutant absorption tower 9 through the volatile organic pollutant absorption port 29 and the air intake pipe 30. At the same time, the moisture measurement port 17 is opened and the moisture meter 18 is inserted into the moisture measurement port 17 to measure the soil moisture content in real time. For the soil contaminated by a single heavy metal, when the measured soil moisture content meets the requirements, the electric heating plate 15 can be adjusted to the on state through the controller 8. For the soil contaminated by heavy metals and volatile organic compounds, while the soil moisture content is measured by the moisture meter 18, the controller 8 turns on the volatile organic detector (FID) 16 through the third cable 73. When the soil moisture content and the concentration of volatile organic compounds meet the requirements, the controller 8 adjusts the electric heating plate 15 to the on state through the first cable 71, and the soil particles 5 fall into the packing buffer layer.

[0037] Finally, in the packing buffer layer 20, the soil particles 5 that fall into the packing buffer layer 20 through the fully mixed layer 11 continuously fall to the pressure generator 21, so that the pressure generator 21 generates electricity and supplies power to the electric heating plate 15 and the rotating shaft 14 through the first wire 191 and the second wire 192 respectively. As mentioned above, during the first pretreatment process, no soil falls into the packing buffer layer 20, and the construction site power supply 26 is used to supply power first. From the second pretreatment, the electricity generated by the pressure generator 21 can be used to supply power to the corresponding parts. After the soil particles 5 hit the pressure generator 21, they fall into the packing bag 24 through the soil discharge port 31. After the drawstring packing bag 24 is full, a construction machine such as a forklift is used to tighten the drawstring 33, so that the drawstring 33 passes through the unconnected part of the packing bag support frame 23 and is placed in the carriage of the transport vehicle 25. After the carriage of the transport vehicle 25 is full, it is transported to the cement kiln.

[0038] The beneficial effects of the high-efficiency mixing system of the utility model for reducing the amount of the contaminated soil dehydration pretreatment agent are:

[0039] The utility model can realize efficient mixing of contaminated soil and pretreatment agent, and can utilize resource utilization to realize the purpose of reducing the dosage of soil dehydration pretreatment agent, greatly reduce the input of reagents, machinery and labor resources, and thus reduce the operation cost, and solve the problems of high cost, low efficiency, insufficient mixing, low accuracy of moisture monitoring and large amount of dust generated in the process of adding pretreatment agent that easily pollutes the environment in the existing soil dehydration pretreatment technology. At the same time, for soil with complex pollution of heavy metals and volatile organic pollutants, it can achieve the dual purpose of reducing volatile organic pollutants in the soil and the dosage of soil dehydration pretreatment agent, effectively prevent the leakage of volatile organic pollutants in the pretreatment process and the dust generated in the process of adding pretreatment agent from polluting the surrounding environment, and can promote the continuous optimization of the pretreatment process of treating contaminated soil by cement kiln coordinated disposal technology.

[0040] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, device, article or method including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, device, article or method. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the presence of other identical elements in the process, device, article or method including the element.

[0041] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An efficient mixing system for reducing the amount of dehydration pretreatment agent used in contaminated soil, characterized in that: Includes pretreatment tower, packaging structure, control structure and volatile organic pollutant absorption tower; The top surface of the pretreatment tower is provided with a contaminated soil inlet, the top of the side of the pretreatment tower is provided with a pretreatment agent inlet, and a quantitative blower is provided inside the pretreatment agent inlet, and the quantitative blower is electrically connected to the control structure; the pretreatment tower is provided with a preliminary mixing layer, a sufficient mixing layer and a packing buffer layer from top to bottom; A first blocking and isolating telescopic plate is provided at the junction between the top of the preliminary mixing layer and the contaminated soil inlet, and a second blocking and isolating telescopic plate is provided at the junction between the bottom of the preliminary mixing layer and the fully mixed layer; An electric heating plate is arranged at the junction of the bottom of the fully mixed layer and the packing buffer layer, a stirrer is arranged above the electric heating plate, a volatile organic pollutant detector is arranged inside the fully mixed layer, the volatile organic pollutant detector is electrically connected to the control structure, and the volatile organic pollutant absorption tower and the moisture meter are arranged outside the fully mixed layer, and the moisture meter is electrically connected to the control interface; A pressure generator is arranged at the bottom of the packing buffer layer, the pressure generator is connected to the agitator, a soil discharge port is arranged in the middle of the pressure generator, a separation structure is connected to the top of the packing buffer layer, a packing structure is arranged below the pressure generator, and a transport vehicle is arranged below the packing structure.

2. The high-efficiency mixing system for reducing the amount of contaminated soil dehydration pretreatment agent according to claim 1 is characterized in that: The control structure includes a controller and multiple cables. The controller is connected to the electric heating plate through a first cable, the controller is connected to the moisture meter through a second cable, the controller is connected to the volatile organic pollutant detector through a third cable, the controller is connected to the first blocking isolation telescopic plate through a fifth cable, the controller is connected to the second blocking isolation telescopic plate through a fourth cable, and the controller is connected to the quantitative hair dryer through a sixth cable.

3. The high-efficiency mixing system for reducing the amount of contaminated soil dehydration pretreatment agent according to claim 1 is characterized in that: The opening and closing states of the first blocking isolation telescopic plate and the second blocking isolation telescopic plate are opposite, that is, the first blocking isolation telescopic plate is opened while the second blocking isolation telescopic plate is closed, and the first blocking isolation telescopic plate is closed while the second blocking isolation telescopic plate is opened.

4. The high-efficiency mixing system for reducing the amount of contaminated soil dehydration pretreatment agent according to claim 1 is characterized in that: The electric heating plate is composed of a plurality of support rods and branch leaves, wherein the support rods are fixedly connected to the inner wall of the pretreatment tower, and the branch leaves are movably connected to the support rods, and the branch leaves can be parallel to the support rods after being merged. At this time, the electric heating plate is in an open state, and the soil in the fully mixed layer can fall into the packing buffer layer; the branch leaves can also be opened and arranged vertically with the support rods in a horizontal plane. At this time, the electric heating plate is in a closed state, and the soil in the fully mixed layer cannot fall.

5. The efficient mixing system for reducing the amount of contaminated soil dehydration pretreatment agent according to claim 1 is characterized in that: A volatile organic pollutant absorption port and a moisture measuring port are provided inside the fully mixed layer. The volatile organic pollutant absorption port is connected to the volatile organic pollutant absorption tower through an air inlet pipe, and the moisture measuring port is used to insert a moisture meter.

6. The high-efficiency mixing system for reducing the amount of contaminated soil dehydration pretreatment agent according to claim 1, characterized in that: A rotating shaft is provided in the middle of the agitator, and a first soil receiver and a second soil receiver are welded to the upper and lower sides of the agitator respectively, and the first soil receiver and the second soil receiver are in the shape of long strip-shaped grooves; the pressure generator is connected to the rotating shafts of the electric heating plate and the agitator through the first wire and the second wire respectively, and the electric energy generated by the pressure generator provides power for the electric heating plate and the agitator, and the pressure generator is distributed in an inverted frustum shape.

7. The high-efficiency mixing system for reducing the amount of contaminated soil dehydration pretreatment agent according to claim 6, characterized in that: The first wire and the second wire are both connected to a power supply at the construction site, so that the electric heating plate is heated through the first wire under the action of the power supply at the construction site, and the rotating shaft is rotated through the second wire.

8. The high-efficiency mixing system for reducing the amount of contaminated soil dehydration pretreatment agent according to claim 1, characterized in that: The separation structure comprises a first separation plate and a second separation plate, both of which are arranged at the bottom of the electric heating plate and are distributed in an inverted V shape at a set angle to prevent the soil in the fully mixed layer from directly falling into the soil discharge port.

9. The high-efficiency mixing system for reducing the amount of contaminated soil dehydration pretreatment agent according to claim 1, characterized in that: The packaging structure includes a hanging rod, a packaging bag support frame and a drawstring packaging bag. The hanging rod is arranged at the bottom of the pretreatment tower and is fixedly connected to the pretreatment tower. The hanging rod is distributed in an L shape. The L-shaped horizontal part of the hanging rod is welded with a packaging bag support frame. The middle part of the long side of the packaging bag support frame is not connected, which is convenient for the drawstring of the drawstring packaging bag to be drawn in and out. The drawstring packaging bag maintains a set distance from the soil discharge port.

10. The high-efficiency mixing system for reducing the amount of contaminated soil dehydration pretreatment agent according to claim 9, characterized in that: The pretreatment tower is in the shape of a column shell, and the packing bag support frame is in the shape of a rectangular frame.

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