A heavy metal contaminated soil remediation treatment device

Abstract

The application provides a heavy metal contaminated soil remediation device, and relates to the technical field of soil remediation, which comprises a soil remediation vehicle, a soil reaction bucket is slidably installed in the soil remediation vehicle, a reagent tank is arranged on the soil remediation vehicle, the reagent tank is used for placing chemical agents, a purification tank is arranged on the soil remediation vehicle, the purification tank is used for purifying harmful substances, a rotating mechanism for spraying the chemical agents is arranged in the soil reaction bucket, in the application, the compact soil particles are broken up by the stirring rod, the soil becomes more loose, the soil particles are more evenly dispersed, and the contact area of the soil and the subsequently added chemical agents is increased; in the traditional soil remediation process, it is difficult to ensure the uniformity of soil stirring, the linkage assembly of the application avoids the complicated process of manual intervention, the soil treatment efficiency is greatly improved, and the reaction efficiency of the subsequent chemical agents and heavy metals is significantly improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of soil remediation, and more particularly relates to a heavy metal contaminated soil remediation device. BACKGROUND

[0002] At present, the heavy metal contaminated soil remediation device has at least the following technical problems:

[0003] In the heavy metal contaminated soil remediation, it is crucial to mix the reagent and the soil sufficiently. The common spraying method is to use a fixed position nozzle, which makes the distribution of the reagent in the soil extremely uneven. The soil has a complex pore structure and particle distribution characteristics, and the fixed nozzle is difficult to penetrate the reagent to the deep layer of the soil and every corner, resulting in excessive reagent in some areas and no access to the reagent in some areas, which greatly affects the remediation effect. Moreover, the current soil turning equipment is not uniform in turning the soil, which also causes the above problems.

[0004] In the soil remediation process, chemical reactions produce various harmful gases. However, many existing remediation sites operate in open environments, and the generated harmful gases are directly discharged into the atmosphere. Once inhaled by the human body, it will cause serious damage to the nervous system, kidneys, etc. Moreover, in addition to the harm to human health, these harmful gases will also cause damage to the surrounding ecological environment and affect the growth and survival of plants and animals. SUMMARY

[0005] In order to solve the above technical problems, the application provides a heavy metal contaminated soil remediation device to solve the above problems.

[0006] A heavy metal contaminated soil remediation device, comprising a soil remediation vehicle, a soil reaction bucket is slidably installed in the soil remediation vehicle, a reagent tank is arranged on the soil remediation vehicle, the reagent tank is used for placing chemical reagents, a purification tank is arranged on the soil remediation vehicle, the purification tank is used for purifying harmful substances, a rotating mechanism for spraying chemical reagents is arranged in the soil reaction bucket, a soil collection pipe is fixedly installed on the soil reaction bucket, a collection screw rod is arranged in the soil collection pipe, a soil discharge pipe is fixedly installed on the soil reaction bucket, a discharge screw rod is arranged in the soil discharge pipe, a linkage assembly for conveying soil is arranged in the soil reaction bucket, and the linkage assembly is arranged between the soil discharge pipe and the collection screw rod.

[0007] Preferably, the linkage assembly comprises a rotating shaft, the rotating shaft is rotatably arranged in the soil reaction barrel, the lower end of the rotating shaft is fixedly provided with a stirring rod, the upper end of the rotating shaft is fixedly provided with a third bevel gear, the circumferential surface of the third bevel gear is engaged with a second bevel gear, the side end of the second bevel gear is fixedly provided with a second rotating rod, the circumferential surface of the third bevel gear is engaged with a first bevel gear, and the side end of the first bevel gear is fixedly provided with a first rotating rod.

[0008] Preferably, the rotating mechanism comprises a fixed support, the fixed support is fixedly arranged on the inner wall of the soil reaction barrel, the first flat gear is rotatably arranged on the fixed support through a bearing, the medicament spraying pipe is slidably arranged in the first flat gear, the circumferential surface of the first flat gear is engaged with a gear transmission belt, the inner wall of the gear transmission belt is engaged with a second flat gear, and the second flat gear is fixedly arranged on the rotating shaft.

[0009] Preferably, the soil remediation vehicle is provided with a reagent conveying pipe in the reagent groove, the reagent conveying pipe is provided with a sealing bearing, the reagent conveying pipe is sleeved with the medicament spraying pipe through the sealing bearing, the upper end of the soil reaction barrel is provided with an air outlet, the purification tank of the soil remediation vehicle is provided with an air inlet, and the air outlet and the air inlet are connected with an exhaust pipe.

[0010] Compared with the prior art, the present application has the following advantages:

[0011] In the present application, the linkage mechanism composed of the rotating shaft, the third bevel gear, the first bevel gear and the second bevel gear is arranged, when the collecting screw rod starts to work and continuously transports the contaminated soil into the soil reaction barrel, the stirring rod linked with the collecting screw rod also rotates synchronously, the stirring rod disperses the compacted soil particles, so that the soil becomes more loose, this cooperative working mode makes the soil particles more evenly dispersed, increases the contact area of the soil and the subsequent chemical reagents, in the traditional soil remediation process, it is difficult to ensure the uniformity of soil stirring, and the linkage assembly of the present application avoids the tedious process of manual intervention, so that the soil treatment efficiency is greatly improved, and the reaction efficiency of the subsequent chemical reagents and heavy metals is significantly improved.

[0012] In the application, the rotating spraying mechanism is mainly composed of a first flat gear, a gear transmission belt, a second flat gear and a pesticide spraying pipe. During the operation of the equipment, the rotation of the rotating shaft becomes the power source of the whole rotating spraying mechanism. The rotating shaft drives the second flat gear to rotate, and the second flat gear drives the first flat gear to rotate through the gear transmission belt, so that the pesticide spraying pipe rotates circumferentially. At the same time, the spray head at the end of the pesticide spraying pipe adopts atomization technology, which can uniformly spray the chemical agent. Compared with the traditional fixed spraying mode, the design advantage of the rotating spraying is obvious. In the traditional fixed spraying mode, it is difficult for the pesticide to cover every corner of the soil, and uneven distribution of the pesticide is prone to occur. However, the rotating spraying mechanism of the application can make the chemical agent contact with the soil in all directions and without dead angle, so as to ensure that the heavy metal and the pesticide fully react and effectively improve the thoroughness of soil remediation.

[0013] In the application, an air outlet is arranged at the top of the soil reaction barrel, which is communicated with the purification tank through an exhaust pipeline. The purification tank is filled with materials with high adsorption performance such as activated carbon and molecular sieve. When the chemical agent in the soil reaction barrel reacts with the soil to produce harmful gas, the gas will enter the purification tank through the air outlet under the guidance of the exhaust pipeline. The adsorption material in the purification tank can quickly capture and adsorb the harmful gas and fix it inside. In this way, the toxic gas will not be directly discharged into the atmosphere, which not only protects the health of the operators and prevents them from being harmed by the harmful gas, but also avoids secondary pollution to the surrounding environment.

[0014] In the application, the height-adjustable structure is suitable for soil remediation of different depths and improves the universality of the equipment. The vertical height of the soil reaction barrel, the soil collecting pipe and the soil discharging pipe can be flexibly adjusted through the screw thread cooperation between the adjusting screw and the lifting block. This function enables the equipment to adapt to different terrains and soil pollution depths, and the remediation of shallow to deep soil can be completed without additional modification, thereby expanding the application scenarios.

[0015] In the application, the spiral conveying structure realizes automatic treatment of soil and reduces labor cost. The collecting spiral rod and the discharging spiral rod are respectively driven by the linkage mechanism, so that the input of contaminated soil and the output of the remediated soil can be automatically completed, the workload of manual loading and unloading is reduced, and the automatic assembly line of "collection-treatment-discharge" is formed by cooperating with the stirring and spraying functions in the reaction barrel, thereby improving the operation efficiency, and the application is especially suitable for rapid remediation of large-area heavy metal contaminated soil. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the application;

[0017] Figure 2 It is a schematic diagram of the structure of the soil remediation vehicle of the application;

[0018] Figure 3 is a structural schematic diagram of the whole soil collection pipe of the present application;

[0019] Figure 4 is a structural schematic diagram of the whole soil reaction bucket of the present application;

[0020] Figure 5 is a structural schematic diagram of the whole purification tank of the present application;

[0021] Figure 6 is a structural schematic diagram of the whole lifting block of the present application;

[0022] Figure 7 is an enlarged schematic diagram of the structure at A of the whole Figure 3 of the present application;

[0023] Figure 8 is an enlarged schematic diagram of the structure at B of the whole Figure 4 of the present application.

[0024] In the drawings, the corresponding relationship between the component names and the drawing numbers is as follows: 11, medicine delivery pipe; 12, medicine spraying pipe; 13, fixed support; 14, first flat gear; 15, gear transmission belt; 16, second flat gear; 17, rotating shaft; 18, servo motor; 19, stirring rod; 21, sealed box; 22, first bevel gear; 23, first rotating rod; 24, second bevel gear; 25, second rotating rod; 26, third bevel gear; 31, soil remediation vehicle; 32, soil reaction bucket; 33, lifting block; 34, adjusting screw rod; 35, purification tank; 36, exhaust pipeline; 37, reagent tank; 41, soil collection pipe; 42, collection spiral rod; 43, discharge spiral rod; 44, soil discharge pipe. DETAILED DESCRIPTION

[0025] The embodiments of the present application will be further described in detail below with reference to the drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0026] Please refer to Figure 1 - Figure 8The application provides a heavy metal contaminated soil remediation device, which comprises a soil remediation vehicle 31, a soil reaction bucket 32 is slidably installed in the soil remediation vehicle 31, a reagent groove 37 is arranged on the soil remediation vehicle 31, the reagent groove 37 is used for placing chemical reagents, a purification groove 35 is arranged on the soil remediation vehicle 31, the purification groove 35 is used for purifying harmful substances, a rotating mechanism for spraying chemical reagents is arranged in the soil reaction bucket 32, a soil collecting pipe 41 is fixedly installed on the soil reaction bucket 32, a collecting screw rod 42 is arranged in the soil collecting pipe 41, when the soil is excavated, the soil is conveyed into the soil reaction bucket 32 through the rotation of the collecting screw rod 42, a soil discharge pipe 44 is fixedly installed on the soil reaction bucket 32, a discharge screw rod 43 is arranged in the soil discharge pipe 44, the soil after purification can be discharged from the soil discharge pipe 44 through the rotation of the discharge screw rod 43, a linkage assembly for conveying soil is arranged in the soil reaction bucket 32, and the linkage assembly is arranged between the soil discharge pipe 44 and the collecting screw rod 42 and is used for linking the discharge screw rod 43, the collecting screw rod 42 and a rotating shaft 17.

[0027] In the embodiment, as shown in Figure 1 、 Figure 3 and Figure 7 , the linkage assembly comprises the rotating shaft 17, the rotating shaft 17 is rotatably arranged in the soil reaction bucket 32, a stirring rod 19 is fixedly installed at the lower end of the rotating shaft 17, the stirring rod 19 can stir the soil entering the bottom of the soil reaction bucket 32, so that the soil inside can be loosened, a third bevel gear 26 is fixedly arranged through the rotating shaft 17, the second bevel gear 24 is engaged with the circumferential surface of the right side of the third bevel gear 26, the second rotating rod 25 is fixedly installed at the side end of the second bevel gear 24, the first bevel gear 22 is engaged with the circumferential surface of the left side of the third bevel gear 26, the first rotating rod 23 is fixedly installed at the side end of the first bevel gear 22, the second rotating rod 25 is connected with the discharge screw rod 43 through a universal joint, the first rotating rod 23 is connected with the collecting screw rod 42 through a universal joint, through the linkage of the third bevel gear 26, the first bevel gear 22 and the second bevel gear 24, the collecting screw rod 42 can be used for inputting the soil, the discharge screw rod 43 can be used for discharging the soil, the stirring rod 19 on the rotating shaft 17 can be used for loosening the soil, so that the efficiency of the soil in subsequent contact with chemical reagents and removal of heavy metals is improved, a sealing box 21 is arranged in the soil reaction bucket 32, the first bevel gear 22, the second bevel gear 24 and the third bevel gear 26 are all arranged in the sealing box 21, a servo motor 18 is fixedly installed at the upper end of the soil reaction bucket 32, and the servo motor 18 is fixedly connected with the rotating shaft 17 through an output shaft.

[0028] In the embodiment, as shown in Figure 1 ,Figure 2 、 Figure 4 and Figure 8 As shown in the figure, the rotating mechanism comprises a fixed support 13 fixedly installed on the inner wall of the soil reaction barrel 32, a first flat gear 14 rotatably installed on the fixed support 13 through a bearing, and a pesticide spraying pipe 12 slidably installed inside the first flat gear 14. A limiting groove is formed on the pesticide spraying pipe 12, and a protruding block matching the limiting groove is arranged on the first flat gear 14, so that the pesticide spraying pipe 12 can move up and down in the first flat gear 14 without rotating. The circumferential surface of the first flat gear 14 is engaged with a gear transmission belt 15, the inner wall of the gear transmission belt 15 is engaged with a second flat gear 16, and the second flat gear 16 is fixedly installed on a rotating shaft 17. When the rotating shaft 17 rotates, the first flat gear 14 and the pesticide spraying pipe 12 can be synchronously moved, and the spray head on the pesticide spraying pipe 12 can rotate 360 degrees, so that the chemical reagent can better contact and react with the soil containing heavy metals.

[0029] In this embodiment, as shown in Figure 1 、 Figure 2 and Figure 4 A pesticide delivery pipe 11 is arranged in the reagent groove 37 of the soil remediation vehicle 31, and the chemical reagent to be used is placed in the reagent groove 37. The lower end of the pesticide delivery pipe 11 is provided with a suction pump for extracting the chemical reagent. When the chemical reagent is needed, it is extracted by the suction pump and then passes through the pesticide delivery pipe 11. The pesticide delivery pipe 11 is provided with a sealing bearing, and the pesticide delivery pipe 11 is sleeved with the pesticide spraying pipe 12 through the sealing bearing. At this time, the pesticide spraying pipe 12 can rotate, and its inside is communicated with the pesticide delivery pipe 11. After the chemical reagent passes through the pesticide delivery pipe 11, it enters the inside of the pesticide spraying pipe 12. At this time, a micro motor is arranged in the spray head at the end of the pesticide spraying pipe 12 for spraying the chemical reagent.

[0030] In this embodiment, as shown in Figure 1 、 Figure 2 and Figure 5As shown, when the soil inside the soil reaction barrel 32 reacts with the chemical reagent, part of the chemical reagent used for soil remediation will volatilize from the soil pores to the atmosphere after irrigation, which is harmful to the respiratory system. The upper end of the soil reaction barrel 32 is provided with an air outlet, and the purification tank 35 opened in the soil remediation vehicle 31 is provided with an air inlet. The air outlet and the air inlet are connected by an exhaust pipe 36, and the exhaust pipe 36 is also provided with an air extraction device. When the chemical reagent inside the soil reaction barrel 32 volatilizes after reacting with the soil, it will float upwards and be extracted into the purification tank 35 through the air extraction device on the exhaust pipe 36. Activated carbon, molecular sieve and other adsorbent materials with high specific surface area are arranged in the purification tank 35. These adsorbent materials can adsorb organic pollutants in harmful gases, and then discharge the purified air through the exhaust port at the side end.

[0031] As shown in the embodiment, Figure 1 、 Figure 6 The circumferential surface of the soil reaction barrel 32 is fixedly installed with a lifting block 33, and the lifting block 33 is installed with an adjusting screw 34 through threaded penetration. The adjusting screw 34 is provided with a power source for driving its rotation. When the device needs to adjust the height of the soil collection pipe 41 and the soil discharge pipe 44, the power source can drive the adjusting screw 34 to rotate, and then the adjusting screw 34 drives the lifting block 33 to move downward through the threaded connection with the lifting block 33, thereby driving the soil reaction barrel 32 and the soil discharge pipe 44 and the soil collection pipe 41 to move downward, and the soil deep in the soil can be turned over.

[0032] Working principle:

[0033] First, before starting the device, according to the actual soil remediation requirements, the adjusting screw 34 is driven to rotate by the power source. Since the adjusting screw 34 is in threaded connection with the lifting block 33, the adjusting screw 34 drives the lifting block 33 to move when it rotates, thereby adjusting the height of the soil collection pipe 41, the soil discharge pipe 44 and the soil reaction barrel 32, so as to operate the soil at different depths.

[0034] Second, when the device moves to the soil area to be repaired, start the collection screw rod 42. The collection screw rod 42 transports the soil from the soil collection pipe 41 to the inside of the soil reaction barrel 32 during rotation. At this time, the shaft 17 rotates under the drive of the servo motor 18, and the stirring rod 19 at the lower end of the shaft 17 rotates, stirring the soil entering the bottom of the soil reaction barrel 32, so as to loosen the soil and facilitate subsequent full contact with the chemical reagent.

[0035] Third step, while rotating the rotating shaft 17, it is synchronously rotated through the fixedly installed third bevel gear 26, the second rotating rod 25 is driven to rotate by the second bevel gear 24 engaged on the right side of the circumferential surface of the third bevel gear 26, the second rotating rod 25 is connected with the discharging spiral rod 43 through a universal coupling, thereby driving the discharging spiral rod 43 to rotate, the first rotating rod 23 is driven to rotate by the first bevel gear 22 engaged on the left side of the third bevel gear 26, the first rotating rod 23 is connected with the collecting spiral rod 42 through a universal coupling, so that the collecting spiral rod 42 is continuously and stably conveyed.

[0036] Fourth step, the chemical agent in the reagent tank 37 is extracted under the action of the extraction pump (prior art), is extracted through the agent conveying pipe 11, the agent conveying pipe 11 is sleeved with the agent spraying pipe 12 through a sealing bearing, the chemical agent enters the inside of the agent spraying pipe 12, the second bevel gear 16 is driven to rotate by the rotating shaft 17, the first bevel gear 14 is driven to rotate by the gear transmission belt 15, the agent spraying pipe 12 slidingly installed in the first bevel gear 14 is rotated (a limiting groove is formed in the agent spraying pipe 12, and the convex block on the first bevel gear 14 is matched with the limiting groove, so that the agent spraying pipe 12 can only slide up and down and cannot rotate), the end nozzle (prior art) of the agent spraying pipe 12 is driven by the micro motor, the chemical agent is uniformly sprayed on the soil, so that the chemical agent and the soil containing heavy metals are fully contacted and reacted, and the heavy metals in the soil are removed.

[0037] Fifth step, during the reaction of the soil in the soil reaction barrel 32 and the chemical agent, part of the chemical agent volatilizes to generate harmful gas, at this time, the air extraction device (prior art) on the exhaust pipe 36 is started, the harmful gas discharged from the air outlet at the upper end of the soil reaction barrel 32 is extracted into the inside of the purification tank 35 through the exhaust pipe 36, the activated carbon, molecular sieve and other adsorption materials in the purification tank 35 adsorb the organic pollutants in the harmful gas, and the purified air is discharged from the air outlet at the side end of the purification tank 35.

[0038] Embodiments of the present application are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the application to the forms disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. Embodiments are chosen and described in order to best explain the principles of the application and its practical application, and to enable others skilled in the art to understand the application for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. A heavy metal contaminated soil remediation treatment device, comprising a soil remediation vehicle (31), characterized in that: The soil reaction bucket (32) is slidably installed in the soil remediation vehicle (31), the soil remediation vehicle (31) is provided with a reagent tank (37), the reagent tank (37) is used for placing chemical agents, and the soil remediation vehicle (31) is provided with a purification tank (35); the purification tank (35) is used for purifying harmful substances; The soil reaction bucket (32) is slidably installed in the soil remediation vehicle (31), the soil remediation vehicle (31) is provided with a reagent tank (37), the reagent tank (37) is used for placing chemical agents, and the soil remediation vehicle (31) is provided with a purification tank (35); the purification tank (35) is used for purifying harmful substances; The linkage assembly includes a rotating shaft (17), the rotating shaft (17) is rotatably installed in the soil reaction bucket (32), a servo motor (18) is fixedly installed at the upper end of the soil reaction bucket (32), the servo motor (18) is fixedly connected with the rotating shaft (17) through an output shaft, a stirring rod (19) is fixedly installed at the lower end of the rotating shaft (17), a third bevel gear (26) is fixedly installed on the rotating shaft (17), a second bevel gear (24) is engaged with the right side of the circumferential surface of the third bevel gear (26), a second rotating rod (25) is fixedly installed at the side end of the second bevel gear (24), a first bevel gear (22) is engaged with the left side of the circumferential surface of the third bevel gear (26), and a first rotating rod (23) is fixedly installed at the side end of the first bevel gear (22); The rotating mechanism includes a fixed support (13), the fixed support (13) is fixedly installed on the inner wall of the soil reaction bucket (32), a first flat gear (14) is rotatably installed on the fixed support (13) through a bearing, a reagent spraying pipe (12) is slidably installed in the first flat gear (14), a gear transmission belt (15) is engaged with the circumferential surface of the first flat gear (14), the inner wall of the gear transmission belt (15) is engaged with a second flat gear (16), and the second flat gear (16) is fixedly installed on the rotating shaft (17); The soil reaction bucket (32) is fixedly installed on the circumferential surface of the soil reaction bucket (32), and the lifting block (33) is fixedly installed on the circumferential surface of the soil reaction bucket (32).

2. The device for remediation of heavy metal contaminated soil according to claim 1, wherein, The soil reaction bucket (32) is fixedly installed on the circumferential surface of the soil reaction bucket (32), and the lifting block (33) is fixedly installed on the circumferential surface of the soil reaction bucket (32).

3. The device for remediation of heavy metal contaminated soil according to claim 2, wherein, The soil reaction bucket (32) is provided with an air outlet at the upper end, the soil remediation vehicle (31) is provided with a purification tank (35), and the purification tank (35) is provided with an air inlet; an exhaust pipe (36) is connected between the air outlet and the air inlet.

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