Microbial degradation device for soil remediation

Abstract

The invention relates to the technical field of soil remediation, in particular to a microbial degradation device for soil remediation, which comprises a conveying part, a spraying part and a mixing part, the conveying part comprises a conveying belt, and the spraying part comprises a spray head positioned above the conveying belt and used for spraying a microbial agent into soil on the conveying belt; the mixing part comprises a vertically-arranged stirring barrel, a stirring piece and a first driving piece for driving the stirring piece to rotate so as to stir and mix soil in the stirring barrel, the stirring piece comprises a rotating shaft connected with an output shaft of the first driving piece and a spiral piece fixedly connected to the rotating shaft, and a hollow channel is formed in the rotating shaft along the axis of the rotating shaft; a plurality of exhaust channels are formed in the stirring part, one end of each exhaust channel penetrates through the surface of the spiral piece, the other end of each exhaust channel is communicated with the hollow channel, and an external air source is hermetically communicated with the hollow channel. According to the scheme, the dispersion uniformity of microorganisms and auxiliary gas in soil can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of soil remediation, and in particular to a microbial degradation device for soil remediation. Background Art

[0002] In order to increase crop yields and income, a large amount of chemical fertilizers and pesticides need to be used, resulting in serious excessive amounts of organic matter in the soil and serious soil pollution. It is difficult for the soil to be quickly repaired by the natural environment, leading to pollution accumulation, and then problems such as severe soil compaction, poor planting environment, and inability to grow crops. In order to ensure the normal function of the soil and achieve sustainable use of the soil, artificial intervention is usually used to repair the soil. Ex situ microbial degradation remediation is a commonly used artificial soil remediation method. It requires the contaminated soil to be dug out and, after preliminary impurity removal and crushing, placed in a microbial degradation device for centralized treatment. By injecting microbial agents into the soil and stirring it, introducing auxiliary gases, and heating it, the pollutants are fully in contact with the microorganisms and the activity of the microorganisms is increased. The microorganisms decompose the organic pollutants in the soil through metabolic activities and convert them into harmless substances, such as carbon dioxide and water, to achieve the purpose of soil remediation. Existing microbial degradation devices usually place soil with added microbial agents into a mixing barrel and introduce auxiliary gas into the mixing barrel. The microbial agent and soil are then mixed and stirred in the mixing barrel by a rotating stirring rod. In this mixing method of simply introducing gas into the mixing barrel and stirring, the gas cannot penetrate the middle part of the soil pile, and the contact area between the gas, soil and microorganisms is small, resulting in poor mixing and dispersion effects between the soil, microorganisms and auxiliary gas, which reduces the rate of microbial degradation and remediation. Summary of the Invention

[0003] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a microbial degradation device for soil remediation, so as to solve the problem that the existing microbial degradation device causes poor mixing and dispersion effects between soil, microorganisms and auxiliary gas, thereby reducing the microbial degradation and remediation rate.

[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is: a microbial degradation device for soil remediation, comprising a conveying part, a spraying part and a mixing part;

[0005] The conveying part includes a conveyor belt, and the spraying part includes a spray head located above the conveyor belt for spraying the microbial agent into the soil on the conveyor belt;

[0006] The mixing section includes a vertically arranged mixing barrel, a mixing member, and a first driving member that drives the mixing member to rotate to mix the soil in the mixing barrel. The mixing member includes a rotating shaft coaxially arranged with the mixing barrel and spiral blades fixedly connected to the rotating shaft. A hollow channel is arranged along the axis of the rotating shaft inside the rotating shaft. A number of exhaust channels are arranged on the mixing member. One end of the exhaust channel penetrates the surface of the spiral blade, and the other end of the exhaust channel communicates with the hollow channel. An external air source is hermetically communicated with the hollow channel.

[0007] In the above solution, the preliminarily screened and crushed soil is placed on the conveyor belt. The conveyor belt sends the soil sprayed with the microbial agent into the mixing barrel. The driving section drives the rotating shaft to rotate, driving the spiral blades to rotate. During rotation, the spiral blades continuously push the soil at the lower part of the mixing barrel upward and then fall back to the bottom space of the mixing barrel through the space near the inner wall of the mixing barrel. At the same time, since the outlet ends of the exhaust channels arranged in a multi-point dispersed manner during mixing are covered by the soil, the auxiliary gas enters the soil in the mixing barrel through the multiple exhaust channels on the spiral blades, improving the dispersion effect of the auxiliary gas in the soil.

[0008] Compared with using mixing rods to mix and stir the soil, in this solution, when mixing and stirring the soil, the spiral blades can push the soil to move upward and fall back over a longer distance, and the auxiliary gas penetrates into the soil through the multi-point dispersed exhaust channels. Therefore, the above solution improves the dispersion uniformity of microorganisms and gas in the soil.

[0009] Further, the mixing barrel is a vertically arranged cylindrical body with an open upper end. The lower section of the mixing barrel is a circular straight barrel, and the upper section of the mixing barrel is a conical barrel. The spiral blades are continuously distributed in a spiral shape around the rotating shaft and are arranged in cooperation with the inner wall of the mixing barrel. A circular support plate that is slidably matched with the inner wall of the lower section of the mixing barrel is horizontally arranged at the lowermost end of the spiral blade. The circular support plate is fixedly connected to the rotating shaft. The mixing section further includes a second driving member for driving the rotating shaft to move in the vertical direction.

[0010] Further, the second driving member includes a first telescopic cylinder arranged below the mixing barrel. The lower end of the rotating shaft passes downward through the bottom plate of the mixing barrel and is coaxially and rotatably connected to the output shaft of the first telescopic cylinder. The rotating shaft is slidably connected to the bottom plate of the mixing barrel.

[0011] Further, the first driving member includes a mounting plate disposed above the mixing barrel, a driving motor disposed on the mounting plate, a driving gear coaxially and fixedly connected to the output shaft of the driving motor, and a driven gear meshing with the driving gear and coaxially disposed with the rotating shaft. The mounting plate is horizontally disposed and fixedly connected to other fixing members. The driven gear is rotatably connected to the mounting plate. A spline hole is provided along the axis of the driven gear. The upper end of the rotating shaft is provided with an external spline section slidably engaged with the spline hole. A through hole one for the rotating shaft to pass through is provided on the mounting plate.

[0012] Further, the upper end of the hollow channel is open, and a rotary joint is coaxially and sealingly rotatably connected to the open end of the hollow channel. An external air source is connected to the rotary joint through an air pipe one to introduce auxiliary gas into the hollow channel.

[0013] Further, a sliding rod is vertically disposed on the mounting plate, and a sliding plate is horizontally disposed on the sliding rod. One end of the sliding plate is sleeved outside the sliding rod and slidably connected to the sliding rod, and the other end of the sliding plate is fixedly connected to the rotary joint.

[0014] Further, the mixing part further includes an outer cylinder sleeved outside the mixing barrel. The outer cylinder is a cylinder with an open upper end. The upper end surface of the outer cylinder is located in the upper space of the mixing barrel. A gap is provided between the inner wall of the outer cylinder and the outer wall of the mixing barrel. The mixing barrel is fixedly connected to the inner wall of the outer cylinder through a first support rod. The first telescopic cylinder is fixedly connected to the inner wall of the mixing barrel through a second support rod.

[0015] Further, a storage box for collecting the mixed soil is provided in the lower inner cavity of the outer cylinder. The storage box is a circular cylinder with an open upper end and slidably engaged with the lower inner wall of the outer cylinder. A reset member is provided between the storage box and the inner bottom wall of the outer cylinder. A second telescopic cylinder for controlling the sliding of the storage box is provided on the outer cylinder. The lower inner cavity of the outer cylinder is communicated with the rotary joint through an air pipe two.

[0016] Further, a three-way pipe fitting is provided at the air inlet of the rotary joint. A first one-way valve and a second one-way valve are respectively provided at port one and port two of the three-way pipe fitting. Port three of the three-way pipe fitting is sealingly and fixedly connected to the air inlet of the rotary joint. The air pipe one is communicated with the rotary joint through the first one-way valve. The air pipe two is communicated with the rotary joint through the second one-way valve.

[0017] Further, the exhaust passage is inclined downward. The outlet end of the exhaust passage penetrates downward through the lower surface of the spiral fin. The inlet end of the exhaust passage is communicated with the hollow passage. The downward inclination of the exhaust passage can prevent fine particulate soil from entering the hollow passage inside the rotating shaft through the exhaust passage under the action of gravity and accumulating to block the hollow passage.

[0018] In the above scheme, the output shaft of telescopic cylinder one is controlled to contract to move the rotating shaft downward, so that a certain gap is generated between the spiral blades and the inner wall of the mixing barrel and the uppermost spiral blades are located in the space below the opening of the mixing barrel. Under the elastic force of the reset member, the storage box is located in the space above telescopic cylinder two. At this time, the output shaft of telescopic cylinder two can be controlled to extend into the bottom of the storage box in the outer cylinder to prevent the storage box from sliding downward.

[0019] The initially screened and crushed soil is placed on a conveyor belt, which then delivers the soil, sprayed with a microbial agent, into a mixing barrel. The drive motor is controlled to rotate the shaft, driving the spiral blades to stir the soil. The rotating spiral blades continuously push the soil from the bottom of the barrel toward the upper space inside the barrel, and then back down to the bottom space of the barrel through the gap between the spiral blades and the inner wall of the barrel, achieving the purpose of repeated stirring, improving the dispersion of microorganisms in the soil and making the microorganisms more evenly dispersed in the soil. While stirring the soil, a fixed amount of auxiliary gas is introduced into the hollow channel within the shaft through an air pipe. Since the outlet ends of the exhaust channels, which are dispersed at multiple points, are covered by soil during stirring, the auxiliary gas enters the soil in the mixing barrel through the multiple exhaust channels on the spiral blades, improving the dispersion of the auxiliary gas in the soil.

[0020] After the soil, microorganisms and auxiliary gas are mixed in the mixing barrel to achieve the preset effect, the telescopic cylinder is controlled to drive the rotating shaft to gradually rise, so that the gap between the spiral blade and the inner wall of the mixing barrel gradually narrows until the soil can no longer fall back through the gap. At this time, the uppermost spiral blade extends out of the opening of the mixing barrel. As the spiral blade continues to rotate, the soil in the mixing barrel is continuously pushed upward, over the opening of the mixing barrel and falls into the outer cylinder. After all the soil in the mixing barrel is discharged by the spiral blade, the drive motor can be stopped.

[0021] The mixed soil that falls over the opening at the upper end of the mixing barrel and into the outer cylinder will fall into the storage box in the lower inner cavity of the outer cylinder and accumulate. At this time, the storage box loaded with soil cannot slide downward due to the obstruction of the output shaft of the telescopic cylinder 2. After all the soil in the mixing barrel falls into the storage box, the output shaft of the telescopic cylinder 2 is controlled to contract so that the storage box loaded with a large amount of soil moves downward rapidly under gravity, and the reset part is squeezed to store energy. The storage box that moves downward rapidly compresses the gas in the space below the storage box in the outer cylinder to generate high-pressure gas. The high-pressure gas enters the hollow channel in the rotating shaft through the air pipe 2 and quickly rushes out of the spiral blades through the exhaust channels, flushing away the soil particles blocked in the exhaust channel when the soil is mixed, so that the exhaust channel can smoothly pass auxiliary gas into the soil during the next mixing.

[0022] After the storage box moves down to the bottom of the outer cylinder, the upper end face of the storage box is located in the space below the output shaft of the second telescopic cylinder and close to the output shaft of the second telescopic cylinder. At this time, controlling the output shaft of the second telescopic cylinder to extend into the outer cylinder can block the upward movement of the storage box, preventing the storage box from moving upward under the elastic force of the reset member during the process of taking out the mixed soil in the storage box, which is inconvenient for taking out the soil. After the soil in the storage box is taken out, control the output shaft of the second telescopic cylinder to contract again. Under the elastic force of the reset member, the storage box moves upward to return to the original position, and then control the output shaft of the second telescopic cylinder to extend to prevent the storage box from sliding down and wait for loading soil again.

[0023] Compared with the prior art that uses a stirring rod to mix and stir the soil, the present solution has at least the following

[0024] Beneficial effects:

[0025] 1. In this solution, according to soil parameters such as the stirring speed and the viscosity of the soil, the first telescopic cylinder can be controlled to drive the rotating shaft to move up or down to adjust the size of the gap between the spiral blade and the inner wall of the stirring barrel, so as to control the falling rate of the soil when it is pushed upward by the spiral blade. The soil can be pushed to a high position by the spiral blade and then fall back to the inner bottom space of the stirring barrel, increasing the flow travel of the soil. The auxiliary gas infiltrates into the soil through the multi-point dispersed exhaust channels. Therefore, the above solution improves the dispersion uniformity of microorganisms and gas in the soil.

[0026] 2. In this solution, after the mixing and stirring of the soil is completed, high-pressure gas can be formed to flush and clean the exhaust channels for adding auxiliary gas, preventing blockage of the exhaust channels.

[0027] 3. In this solution, the conical stirring barrel is matched with the conical spiral blade. In addition to controlling the falling rate of the soil in the stirring barrel, the soil in the stirring barrel is discharged from the opening at the upper end of the stirring barrel through the cooperation of the conical stirring barrel and the conical spiral blade. There is no need to additionally provide a valve at the bottom of the stirring barrel and add components and equipment for controlling the opening / closing of the valve, making the manufacturing of the stirring barrel simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0029] Figure 1 is a schematic structural view of the main viewing direction of a microbial degradation device for soil remediation according to the present invention Figure 1 .

[0030] Figure 2 is Figure 1 the enlarged view of part A in

[0031] Figure 3 is Figure 1 the enlarged view of part B in

[0032] Figure 4 is Figure 1 the enlarged view of part C in

[0033] Figure 5 is the structural schematic diagram in the front view direction of an invention of a microbial degradation device for soil remediation Figure 2 .

[0034] The meanings of the reference numerals in the drawings are as follows:

[0035] Conveying part - 10;

[0036] Spraying part - 20;

[0037] Mixing part - 30; mixing barrel - 31;

[0038] Rotating shaft - 321; spiral blade - 322; hollow channel - 3211; external spline section - 3212; exhaust channel - 323; circular support plate - 324; telescopic cylinder one - 325; rotating seat - 3251;

[0039] Mounting plate - 331; through hole one - 3310; drive motor - 332; driving gear - 333; driven gear - 334; spline hole - 3341; support column - 335;

[0040] Outer cylinder - 34; support rod one - 341; support rod two - 342; door leaf two - 343;

[0041] Rotary joint - 41; air pipe one - 42; sliding rod - 43; sliding plate - 44; air pipe two - 45; three - way pipe fitting - 46; check valve one - 461; check valve two - 462;

[0042] Storage box - 50; door leaf one - 501; spring - 51; telescopic cylinder two - 52. Specific embodiments

[0043] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts fall within the scope of protection of the present application.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used in the description of the present invention herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention.

[0045] A microbial degradation device for soil remediation according to this embodiment, as Figures 1 - 5 shown, includes a conveying part 10, a spraying part 20 and a mixing part 30.

[0046] The conveying part 10 includes a conveyor belt, and the spraying part 20 includes a nozzle located above the conveyor belt for spraying microbial agents onto the soil on the conveyor belt. Both the conveyor belt and the nozzle adopt existing conventional technologies and will not be elaborated here.

[0047] The mixing part 30 includes a vertically arranged stirring barrel 31, a stirring member, a first driving member for driving the stirring member to rotate to stir and mix the soil in the stirring barrel 31, a second driving member for driving the stirring member to move in the vertical direction, and an outer cylinder 34 sleeved outside the stirring barrel 31 and arranged with a gap from the stirring barrel 31. The stirring barrel 31 is a vertically arranged cylindrical body with an open upper end. The lower section of the stirring barrel 31 is a circular straight barrel, and the upper section of the stirring barrel 31 is a conical barrel. The bottom plate of the stirring barrel 31 and the side wall of the stirring barrel 31 can be detachably arranged, and then the bottom plate of the stirring barrel 31 and the side wall of the stirring barrel 31 are fixedly connected by bolts, which is convenient for installing the stirring member in the stirring barrel 31 and for repairing and cleaning the inside of the stirring barrel 31.

[0048] The stirring member includes a rotating shaft 321 arranged coaxially with the stirring barrel 31 and spiral blades 322 fixedly connected to the rotating shaft 321. The spiral blades 322 are continuously distributed in a spiral shape around the rotating shaft 321 and are arranged in cooperation with the inner wall of the stirring barrel 31. A circular support plate 324 is horizontally arranged at the lowermost end of the spiral blade 322. The circular support plate 324 is sleeved on the rotating shaft 321 and fixedly connected to the rotating shaft 321. The circular support plate 324 is in sliding fit with the inner wall of the lower section of the stirring barrel 31 to prevent soil from flowing into the stirring barrel 31 below the circular support plate 324. A hollow channel 3211 is coaxially arranged along the axis of the rotating shaft 321 inside the rotating shaft 321. The upper end of the hollow channel 3211 is open, that is, the upper end of the hollow channel 3211 penetrates upward through the upper end surface of the rotating shaft 321. The open end of the hollow channel 3211 is coaxially and sealingly rotatably connected to a rotary joint 41. An external gas source is connected to the rotary joint 41 through an air pipe 42 to introduce auxiliary gas into the hollow channel 3211. Combined with Figure 1 、 Figure 3As shown, a number of exhaust channels 323 are provided on the stirring member. One end of the exhaust channel 323 penetrates the surface of the spiral blade 322, and the other end of the exhaust channel 323 communicates with the hollow channel 3211. Specifically, the exhaust channel 323 is arranged obliquely downward. The air outlet end of the exhaust channel 323 penetrates the lower surface of the spiral blade 322 obliquely downward, and the air inlet end of the exhaust channel 323 communicates with the hollow channel 3211.

[0049] The outer cylinder 34 is coaxially arranged with the stirring barrel 31. The outer cylinder 34 is a cylindrical body with an open upper end. The upper section of the outer cylinder 34 is a conical cylinder that cooperates with the upper section of the stirring barrel 31, and the lower section of the outer cylinder 34 is a circular straight cylinder. The upper end surface of the outer cylinder 34 is located in the upper space of the stirring barrel 31, that is, the open end of the outer cylinder 34 is higher than the open end of the stirring barrel 31, and there is a gap between the inner wall of the outer cylinder 34 and the outer wall of the stirring barrel 31. The stirring barrel 31 is fixedly connected to the inner wall of the outer cylinder 34 through a first support rod 341. A plurality of first support rods 341 are circumferentially and evenly distributed on the inner wall of the outer cylinder 34 below the stirring barrel 31. The first support rods 341 are all fixedly connected to the inner wall of the outer cylinder 34. The bottom plate of the stirring barrel 31 is fixedly connected to the first support rod 341, and a second support rod 342 is fixedly connected to the inner wall of the outer cylinder 34 below the first support rod 341.

[0050] The second driving member includes a first telescopic cylinder 325 provided on the second support rod 342 below the stirring barrel 31. The first telescopic cylinder 325 can be a pneumatic telescopic cylinder, a hydraulic telescopic cylinder or an electric telescopic rod. Preferably, a hydraulic telescopic cylinder is used. The first telescopic cylinder 325 is externally connected to an oil cylinder for controlling the expansion and contraction of the output shaft of the first telescopic cylinder 325. The first telescopic cylinder 325 is coaxially arranged with the rotating shaft 321 and the output shaft of the first telescopic cylinder 325 is arranged upward. As Figure 1 、 Figure 4 shown, a rotating seat 3251 is fixedly connected to the output of the first telescopic cylinder 325. The lower end of the rotating shaft 321 passes downward through the bottom plate of the stirring barrel 31 and is rotatably connected to the rotating seat 3251 on the output shaft of the first telescopic cylinder 325. The rotating shaft 321 is slidably connected to the bottom plate of the stirring barrel 31.

[0051] As Figure 1 、 Figure 2As shown in the figure, the first driving member includes a mounting plate 331 disposed above the stirring barrel 31, a driving motor 332 disposed on the mounting plate 331, a driving gear 333 coaxially and fixedly connected to the output shaft of the driving motor 332, and a driven gear 334 meshing with the driving gear 333 and coaxially disposed with the rotating shaft 321. The mounting plate 331 is horizontally disposed and fixedly connected to the upper end of a support column 335, and the lower end of the support column 335 is fixedly connected to the ground. The driving motor 332 is mounted on the upper surface of the mounting plate 331. The driving motor 332 is externally connected to a power supply and a controller. The output shaft of the driving motor 332 vertically penetrates the mounting plate 331. The driving gear 333 is disposed below the mounting plate 331 and coaxially and fixedly connected to the output shaft of the driving motor 332. The driven gear 334 is rotatably connected to the mounting plate 331 and coaxially disposed with the rotating shaft 321. A spline hole 3341 is formed along the axis inside the driven gear 334. The spline hole 3341 is a through hole. An external spline section 3212 slidably engaged with the spline hole 3341 is provided at the upper end of the rotating shaft 321. A through hole 3310 for the rotating shaft 321 to pass through is provided on the mounting plate 331. A sliding rod 43 is vertically disposed on the mounting plate 331. The lower end of the sliding rod 43 is fixedly connected to the mounting plate 331. A sliding plate 44 is horizontally disposed on the sliding rod 43. One end of the sliding plate 44 is sleeved outside the sliding rod 43 and slidably connected to the sliding rod 43, and the other end of the sliding plate 44 is fixedly connected to the rotary joint 41. A tee pipe fitting 46 is provided at the air inlet of the rotary joint 41. A check valve 461 and a check valve 462 are respectively provided at the first port and the second port of the tee pipe fitting 46. The third port of the tee pipe fitting 46 is hermetically and fixedly connected to the air inlet of the rotary joint 41. The first air pipe 42 is communicated with the rotary joint 41 through the check valve 461. One end of the first air pipe 42 is communicated with an external air source for providing auxiliary gas, and the other end of the first air pipe 42 is communicated with the check valve 461. The check valve 461 only allows gas to flow from the first air pipe 42 through the check valve 461 to the rotary joint 41. A second air pipe 45 is provided on the check valve 462. One end of the second air pipe 45 is communicated with the lower inner cavity of the outer cylinder 34, and the other end of the second air pipe 45 is communicated with the check valve 462. The check valve 462 only allows gas to flow from the second air pipe 45 through the check valve 462 to the rotary joint 41.

[0052] As Figure 1As shown in the figure, a storage box 50 for collecting the mixed soil is arranged in the lower inner cavity of the outer cylinder 34. The storage box 50 is a circular cylinder with an open upper end and is slidably matched with the inner wall of the lower part of the outer cylinder 34. A spring 51 is vertically arranged between the storage box 50 and the inner bottom wall of the outer cylinder 34. The upper end of the spring 51 is fixedly connected to the bottom plate of the storage box 50, and the lower end of the spring 51 is fixedly connected to the bottom plate of the outer cylinder 34. At least two telescopic cylinders II 52 are circumferentially and evenly distributed on the outer wall of the outer cylinder 34. In this actual example, three telescopic cylinders II 52 are circumferentially and evenly distributed on the outer wall of the outer cylinder 34. In other embodiments, the number of telescopic cylinders II 52 can be flexibly set according to the specifications of the device, which will not be listed one by one here. The telescopic cylinder II 52 can be a pneumatic telescopic cylinder, a hydraulic telescopic cylinder or an electric telescopic rod. Preferably, an electric telescopic rod is adopted. The telescopic cylinders II 52 are all externally connected to a power source and a controller for controlling the synchronous telescopic movement of the output shafts of all the telescopic rods II. The output shafts of the telescopic cylinders II 52 are arranged along the radial direction of the outer cylinder 34. A through hole for matching with the output shaft of the telescopic cylinder II 52 is arranged on the side wall of the outer cylinder 34 to allow the output shaft of the telescopic cylinder II 52 to extend into the outer cylinder 34. When the storage box 50 is not loaded with soil, under the elastic force of the spring 51, the storage box 50 is located in the upper space of the telescopic cylinder II 52. At this time, the output shaft of the telescopic cylinder II 52 can be controlled to extend into the outer cylinder 34 below the storage box 50 to prevent the storage box 50 from sliding downwards.

[0053] To facilitate the removal of the soil in the storage box 50, a door opening I for removing the soil in the storage box 50 is arranged on the side wall of the storage box 50, and a door leaf I 501 for opening / closing the door opening I is arranged on the door opening I. A door opening II is arranged on the lower side wall of the outer cylinder 34 aligned with the door opening I, and a door leaf II 343 for opening / closing the door opening II is arranged on the door opening II.

[0054] It can be understood that the auxiliary gas in this solution includes but is not limited to gases such as oxygen, nitrogen, and hot air.

[0055] When the above solution is used, first control the output shaft of the telescopic cylinder I 325 to contract to move the rotating shaft 321 downward, so that a certain gap is generated between the spiral blade 322 and the inner wall of the mixing barrel 31 and the uppermost spiral blade 322 is located in the inner space of the mixing barrel 31. Under the elastic force of the spring 51, the storage box 50 is located in the upper space of the telescopic cylinder II 52. At this time, the output shaft of the telescopic cylinder II 52 can be controlled to extend into the outer cylinder 34 below the storage box 50 to prevent the storage box 50 from sliding downwards.

[0056] Place the preliminarily screened and crushed soil on the conveyor belt. The conveyor belt feeds the soil sprayed with microbial agents into the stirring barrel 31. Control the driving motor 332 to operate, drive the rotating shaft 321 to rotate, drive the spiral blade 322 to rotate, and stir the soil. During the rotation, the spiral blade 322 continuously pushes the soil at the lower part of the stirring barrel 31 upward into the inner upper space of the stirring barrel 31, and then falls back to the bottom space of the stirring barrel 31 through the gap between the spiral blade 322 and the inner wall of the stirring barrel 31, achieving the purpose of repeated stirring, improving the dispersion effect of microorganisms in the soil, and making the microorganisms more evenly dispersed in the soil. When stirring the soil, a certain amount of auxiliary gas is introduced into the hollow channel 3211 in the rotating shaft 321 through the air pipe 1 42 via the rotary joint 41. Since the outlet ends of the exhaust channels 323 arranged in a multi-point dispersion manner during stirring are located in the soil pile, the auxiliary gas enters the soil in the stirring barrel 31 through the multiple exhaust channels 323 on the spiral blade 322, improving the dispersion effect of the auxiliary gas in the soil.

[0057] After the soil, microorganisms and auxiliary gas are mixed in the stirring barrel 31 to reach the preset effect, control the telescopic cylinder 1 325 to push the rotating shaft 321 to gradually rise, so that the gap between the spiral blade 322 and the inner wall of the stirring barrel 31 gradually decreases until the soil cannot fall back downward through this gap. At this time, the uppermost spiral blade 322 moves upward to extend outside the opening of the stirring barrel 31. As the spiral blade 322 rotates continuously, the soil in the stirring barrel 31 is continuously pushed upward, overflows the opening of the stirring barrel 31 and falls into the outer cylinder 34 until all the soil in the stirring barrel 31 is discharged by the spiral blade 322, and then the driving motor 332 can be stopped from running.

[0058] The mixed soil that overflows the upper opening of the stirring barrel 31 and falls into the outer cylinder 34 will fall into the storage box 50 in the lower inner cavity of the outer cylinder 34 and accumulate. At this time, blocked by the output shaft of the telescopic cylinder 2 52, the storage box 50 loaded with soil cannot slide downward, as Figure 5 shown. After all the soil in the stirring barrel 31 has fallen into the storage box 50, control the output shafts of each telescopic cylinder 2 52 to contract synchronously, so that the storage box 50 loaded with a large amount of soil quickly moves downward under gravity, and the spring 51 is compressed to store energy. The quickly moving storage box 50 quickly compresses the gas in the space below the storage box 50 in the outer cylinder 34 to generate high-pressure gas. The high-pressure gas enters the hollow channel 3211 in the rotating shaft 321 through the air pipe 2 45 and quickly rushes out of the spiral blade 322 through each exhaust channel 323, flushing away the soil particles blocking in the exhaust channel 323 during the stirring of the soil, so that the exhaust channel 323 can smoothly introduce the auxiliary gas into the soil during the next stirring.

[0059] After the storage box 50 is moved down to the bottom of the outer cylinder 34, the upper end surface of the storage box 50 is located in the space below the output shaft of the second telescopic cylinder 52 and close to the output shaft of the second telescopic cylinder 52. At this time, controlling the output shaft of the second telescopic cylinder 52 to extend into the outer cylinder 34 can block the upward movement of the storage box 50, preventing the storage box 50 from moving upward under the elastic force of the spring 51 during the process of taking out the mixed soil in the storage box 50, which is inconvenient for taking out the soil. After the soil in the storage box 50 is taken out, control is made again to contract the output shaft of the second telescopic cylinder 52. Under the elastic force of the spring 51, the storage box 50 moves upward to return to the original position, and then control is made to extend the output shaft of the second telescopic cylinder 52 to prevent the storage box 50 from sliding down and wait for loading the mixed soil again.

[0060] The above are only embodiments of the present invention. Specific structures and common knowledge such as characteristics well known in the art are not described in detail herein. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be subject to the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. A microbial degradation device for soil remediation, comprising a conveying part (10), a spraying part (20) and a mixing part (30). The conveying part (10) includes a conveyor belt, and the spraying part (20) includes a nozzle located above the conveyor belt for spraying microbial agents onto the soil on the conveyor belt. It is characterized in that: The mixing part (30) includes a vertically arranged stirring barrel (31), a stirring member and a first driving member for driving the stirring member to rotate to stir and mix the soil in the stirring barrel (31). The stirring member includes a rotating shaft (321) coaxially arranged with the stirring barrel (31) and a spiral blade (322) fixedly connected to the rotating shaft (321). A hollow channel (3211) is arranged along the axis of the rotating shaft (321) inside the rotating shaft (321). A plurality of exhaust channels (323) are arranged on the stirring member. One end of the exhaust channel (323) penetrates the surface of the spiral blade (322), and the other end of the exhaust channel (323) communicates with the hollow channel (3211). An external air source is hermetically connected to the hollow channel (3211).

2. The microbial degradation device for soil remediation according to claim 1, characterized in that: The stirring barrel (31) is a vertically arranged cylindrical body with an open upper end. The lower section of the stirring barrel (31) is a circular straight barrel, and the upper section of the stirring barrel (31) is a conical barrel. The spiral blade (322) is continuously distributed spirally around the rotating shaft (321) and is arranged in cooperation with the inner wall of the stirring barrel (31). A circular support plate (324) that is slidably matched with the inner wall of the lower section of the stirring barrel (31) is horizontally arranged at the lowermost end of the spiral blade (322). The circular support plate (324) is fixedly connected to the rotating shaft (321). The mixing part (30) further includes a second driving member for driving the rotating shaft (321) to move in the vertical direction.

3. The microbial degradation device for soil remediation according to claim 2, characterized in that: The second driving member includes a first telescopic cylinder (325) arranged below the stirring barrel (31). The lower end of the rotating shaft (321) passes downward through the bottom plate of the stirring barrel (31) and is coaxially and rotatably connected to the output shaft of the first telescopic cylinder (325). The rotating shaft (321) is slidably connected to the bottom plate of the stirring barrel (31).

4. The microbial degradation device for soil remediation according to claim 3, characterized in that: The first driving member includes a mounting plate (331) arranged above the stirring barrel (31), a driving motor (332) arranged on the mounting plate (331), a driving gear (333) coaxially and fixedly connected to the output shaft of the driving motor (332), and a driven gear (334) meshing with the driving gear (333) and coaxially arranged with the rotating shaft (321). The mounting plate (331) is horizontally arranged and fixedly connected to other fixing members. The driven gear (334) is rotatably connected to the mounting plate (331). A spline hole (3341) is arranged along the axis inside the driven gear (334). An external spline section (3212) that is slidably matched with the spline hole (3341) is arranged at the upper end of the rotating shaft (321). A through hole one (3310) for the rotating shaft (321) to pass through is arranged on the mounting plate (331).

5. The microbial degradation device for soil remediation according to claim 4, characterized in that: The upper end of the hollow channel (3211) is open, and the open end of the hollow channel (3211) is coaxially and sealingly rotationally connected to a rotary joint (41). An external air source is connected to the rotary joint (41) through a first air pipe (42) to introduce auxiliary gas into the hollow channel (3211).

6. The microbial degradation device for soil remediation according to claim 5, wherein: A slide bar (43) is vertically arranged on the mounting plate (331). A slide plate (44) is horizontally arranged on the slide bar (43). One end of the slide plate (44) is sleeved outside the slide bar (43) and is slidably connected to the slide bar (43), and the other end of the slide plate (44) is fixedly connected to the rotary joint (41).

7. The microbial degradation device for soil remediation according to claim 6, wherein: The mixing part (30) further includes an outer cylinder (34) sleeved outside the stirring barrel (31). The outer cylinder (34) is a cylinder with an open upper end. The upper end surface of the outer cylinder (34) is located in the upper space of the stirring barrel (31). A gap is provided between the inner wall of the outer cylinder (34) and the outer wall of the stirring barrel (31). The stirring barrel (31) is fixedly connected to the inner wall of the outer cylinder (34) through a first support rod (341). The first telescopic cylinder (325) is fixedly connected to the inner wall of the stirring barrel (31) through a second support rod (342).

8. The microbial degradation device for soil remediation according to claim 7, wherein: A storage box (50) for collecting the mixed soil is arranged in the lower inner cavity of the outer cylinder (34). The storage box (50) is a circular cylinder with an open upper end and is slidably matched with the lower inner wall of the outer cylinder (34). A reset member is arranged between the storage box (50) and the inner bottom wall of the outer cylinder (34). An second telescopic cylinder (52) for controlling the sliding of the storage box (50) is arranged on the outer cylinder (34). The lower inner cavity of the outer cylinder (34) is communicated with the rotary joint (41) through a second air pipe (45).

9. The microbial degradation device for soil remediation according to claim 8, wherein: A three-way pipe fitting (46) is arranged at the air inlet of the rotary joint (41). A first one-way valve (461) and a second one-way valve (462) are respectively arranged at the first port and the second port of the three-way pipe fitting (46). The third port of the three-way pipe fitting (46) is sealingly and fixedly connected to the air inlet of the rotary joint (41). The first air pipe (42) is communicated with the rotary joint (41) through the first one-way valve (461). The second air pipe (45) is communicated with the rotary joint (41) through the second one-way valve (462).

10. The microbial degradation device for soil remediation according to claim 1, characterized in that: The exhaust channel (323) is arranged obliquely downward. The air outlet end of the exhaust channel (323) obliquely downward penetrates the lower surface of the spiral fin (322). The air inlet end of the exhaust channel (323) is communicated with the hollow channel (3211).

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