Contaminated soil remediation equipment and remediation method thereof

Abstract

The invention provides contaminated soil remediation equipment and a remediation method thereof, and belongs to the technical field of soil remediation. The contaminated soil remediation equipment comprises a remediation box, a crushing box, a crushing mechanism and a chemical injection mechanism, the crushing box is installed on the surface of the remediation box, a feeding bin is installed on the surface of the crushing box, the crushing mechanism is installed in an inner cavity of the crushing box and used for crushing soil, and the crushing mechanism comprises a first crushing roller, a first sieve plate and an annular sieve plate; the first crushing roller is rotationally installed in an inner cavity of the crushing box, and a second crushing roller is rotationally installed in the inner cavity of the crushing box. The crushing mechanism is arranged, a first motor drives a first crushing roller and a second crushing roller to rotate, soil is preliminarily crushed, the preliminarily crushed soil is screened through a first screening plate, and the soil penetrating through the first screening plate falls onto the surface of an annular screening plate; and the soil falling onto the surface of the annular sieve plate is subjected to secondary crushing through the grinding roller, so that the subsequent mixing uniformity of the soil and the remediation agent is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of soil remediation, and in particular to a contaminated soil remediation device and a remediation method thereof. Background Art

[0002] Contaminated land may lose its cultivability and cannot be used sustainably for agricultural production. Existing contaminated soil remediation can use thermal desorption to heat the soil to desorb organic pollutants in the soil, such as volatile organic compounds and petroleum pollutants. However, before desorption, it is necessary to manually spray the contaminated soil with a remediation agent to accelerate the subsequent desorption progress, which is inconvenient to construct and cannot evenly mix the remediation agent with the soil. Summary of the invention

[0003] In order to make up for the above deficiencies, the present invention provides a contaminated soil remediation device and a remediation method thereof that overcome the above technical problems or at least partially solve the above problems.

[0004] The present invention is achieved in that: The present invention provides a contaminated soil remediation device, comprising a remediation box, a crushing box, a crushing mechanism and a drug injection mechanism, wherein the crushing box is mounted on the surface of the remediation box, a feed bin is mounted on the surface of the crushing box, and the crushing mechanism is mounted in the inner cavity of the crushing box for crushing the soil, and the crushing mechanism comprises: A first crushing roller, the first crushing roller is rotatably mounted in the inner cavity of the crushing box; A first screen plate, which is slidably mounted in the inner cavity of the crushing box and is used for preliminary screening of the soil; An annular sieve plate, which is installed in the inner cavity of the crushing box and is used for secondary screening of the soil. A mounting seat is rotatably mounted on the surface of the annular sieve plate, and a rolling roller is symmetrically rotatably mounted on the side wall of the mounting seat for secondary crushing of the soil; The injection mechanism is installed in the inner cavity of the crushing box and is used to inject the repair agent into the soil. The injection mechanism includes a medicine distribution ring, an injection pipe and a spray hole. The medicine distribution ring is fixedly installed at the bottom of the annular sieve plate, and the side wall of the medicine distribution ring is installed with an injection pipe, and the side wall of the injection pipe is provided with a spray hole.

[0005] In a preferred embodiment, a second crushing roller is rotatably installed in the inner cavity of the crushing box, crushing knives are fixedly installed on the surfaces of the first crushing roller and the second crushing roller, a first motor is fixedly installed on the side wall of the crushing box, an output end of the first motor is fixedly connected to one end of the first crushing roller, a first gear is fixedly installed on the other end of the first crushing roller, a second gear is fixedly installed on one end of the second crushing roller, and the first gear is meshed with the second gear.

[0006] In a preferred solution, a slider is fixedly installed on the side wall of the first screen plate, and the slider is slidably installed in the inner cavity of the crushing box. A first spring is fixedly installed in the inner cavity of the crushing box, and one end of the first spring is fixedly connected to the slider for driving the first screen plate to move downward. A first rotating shaft is rotatably installed in the inner cavity of the crushing box, and bumps are symmetrically fixedly installed on the surface of the first rotating shaft, and the bumps are in contact with the surface of the first screen plate, a first pulley is fixedly installed on one end of the first rotating shaft, and a second pulley is fixedly installed on one end of the second crushing roller, and a belt is connected between the first pulley and the second pulley.

[0007] In a preferred solution, a plurality of protrusions are installed on the surface of the rolling roller, a third gear is fixedly installed on one end of the rolling roller, a gear ring is fixedly installed in the inner cavity of the crushing box, the third gear is meshed with the gear ring, a fourth gear is fixedly installed on the surface of the mounting seat, a fifth gear is fixedly installed on the surface of the first rotating shaft, the fifth gear is meshed with the fourth gear, and a first scraper is symmetrically fixedly installed on the side wall of the mounting seat, the first scraper is in contact with the surface of the annular screen plate, and is used to clean the soil on the surface of the annular screen plate.

[0008] In a preferred solution, a medicine injection tank is symmetrically fixedly mounted on the side wall of the crushing box, a piston is slidably mounted in the inner cavity of the medicine injection tank, a rotating wheel is fixedly mounted on one end of the first rotating shaft, an eccentric shaft is fixedly mounted on the surface of the rotating wheel, a driving frame is sleeved on the surface of the eccentric shaft, and a connecting rod is connected between the driving frame and the piston.

[0009] In a preferred embodiment, a medicine storage tank is installed on the surface of the repair box for storing the repair agent, and a first one-way valve and a second one-way valve are installed on the side wall of the medicine injection tank. A water pipe is connected between the first one-way valve and the medicine storage tank, and a water pipe is connected between the second one-way valve and the medicine distribution ring.

[0010] In a preferred solution, a second rotating shaft is fixedly mounted on the bottom of the mounting seat, a stirring rod is fixedly mounted on the side wall of the second rotating shaft for mixing the repair agent with the soil, a second scraper is symmetrically fixedly mounted on the side wall of the second rotating shaft, the second scraper is in contact with the inner wall of the crushing box, and is used to clean the soil on the inner wall of the crushing box, and a spiral blade is fixedly mounted on the surface of the second rotating shaft for delivering the soil into the repair box.

[0011] In a preferred solution, a desorption mechanism is installed in the inner cavity of the repair box for heating and desorbing the soil. The desorption mechanism includes a accommodating chamber and a heating coil. The accommodating chamber is arranged in the inner cavity of the repair box. A heating chamber is opened in the inner cavity of the repair box. A heating coil is installed in the heating chamber for heating the accommodating chamber.

[0012] In a preferred solution, a third rotating shaft is rotatably installed in the inner cavity of the repair box, a second motor is fixedly installed on the side wall of the repair box, the output end of the second motor is fixedly connected to one end of the third rotating shaft, a turning plate is installed on the side wall of the third rotating shaft for turning over the soil in the accommodating cavity, a feeding pipe is installed on the side wall of the repair box, and an exhaust pipe is installed on the surface of the repair box.

[0013] A contaminated soil remediation method, applicable to the above-mentioned contaminated soil remediation equipment, comprises the following steps: S1: Pretreatment: The contaminated soil is put into the crushing box through the feed bin, and the first crushing roller and the second crushing roller are driven by the first motor to rotate, and the soil is initially crushed, and the initially crushed soil is screened by the first screen plate, and the soil passing through the first screen plate falls onto the surface of the annular screen plate, and the soil falling onto the surface of the annular screen plate is secondary crushed by the rolling roller; S2: Injection: The eccentric shaft drives the driving frame to swing left and right, driving the piston to move back and forth in the injection tank, and the first one-way valve and the second one-way valve are alternately turned on to inject the repair agent in the storage tank into the medicine distribution ring and spray it evenly into the soil from the spray hole. When the mounting seat rotates, the second rotating shaft is driven to rotate synchronously, and the soil is further mixed through the stirring rod; S3: Desorption; After the soil and the repair agent are mixed, they are sent into the containing chamber through the spiral blade, heated by the heating coil, and the third shaft is driven to rotate by the second motor, driving the turning plate to turn the soil in the containing chamber so that it is evenly heated. The soil temperature is gradually increased, and the high temperature causes organic pollutants in the soil, such as petroleum hydrocarbons, pesticides, volatile organic compounds, etc., to be desorbed from the soil particles.

[0014] The present invention provides a contaminated soil remediation device and a remediation method thereof, and its beneficial effects include: 1. By setting up a crushing mechanism, the first motor drives the first crushing roller and the second crushing roller to rotate, the soil is preliminarily crushed, and the preliminarily crushed soil is screened by the first screen plate. The soil passing through the first screen plate falls onto the surface of the annular screen plate, and the soil falling onto the surface of the annular screen plate is secondary crushed by the rolling roller to improve the uniformity of subsequent mixing of the soil and the repair agent.

[0015] 2. By setting up a medicine injection mechanism, the eccentric shaft drives the driving frame to swing left and right, and the connecting rod drives the piston to move back and forth in the medicine injection tank. The first one-way valve and the second one-way valve are alternately turned on, and the repair agent in the medicine storage tank is injected into the medicine distribution ring and sprayed evenly into the soil from the spray hole. When the mounting seat rotates, the second rotating shaft is driven to rotate synchronously, and the soil is further mixed by the stirring rod to ensure that the soil and the repair agent are evenly mixed.

[0016] 3. By setting up a desorption mechanism, after the soil and the repair agent are mixed, they are sent into the containing chamber through the spiral blade, heated by the heating coil, and the third shaft is driven to rotate by the second motor, driving the turning plate to turn the soil in the containing chamber, so that it is heated evenly, and the soil temperature is gradually increased. The high temperature makes the organic pollutants in the soil, such as petroleum hydrocarbons, pesticides, volatile organic compounds, etc., desorbed from the soil particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those skilled in the art, other relevant drawings can be obtained based on these drawings without creative work. Figure 1 is a first angle stereogram provided by an embodiment of the present invention; Figure 2 A second angle stereogram provided for an embodiment of the present invention; Figure 3 A third angle stereogram provided for an embodiment of the present invention; Figure 4 A cross-sectional view of a crushing box provided for an embodiment of the present invention; Figure 5 A fourth angle cross-sectional view provided for an embodiment of the present invention; Figure 6 A cross-sectional view of a repair box provided for an embodiment of the present invention; Figure 7 A fifth angle cross-sectional view provided for an embodiment of the present invention; Figure 8 The embodiments of the present invention provide Figure 7 Enlarged view of point A in the middle; Fig. 9 An exploded diagram of an embodiment of the present invention is provided.

[0018] In the figure: 1, repair box; 2, crushing box; 3, feed bin; 4, crushing mechanism; 401, first crushing roller; 402, second crushing roller; 403, crushing knife; 404, first motor; 405, first gear; 406, second gear; 407, first screen plate; 408, slider; 409, first spring; 410, first rotating shaft; 411, bump; 412, first pulley; 413, second pulley; 414, annular screen plate; 415, mounting seat; 416, rolling roller; 417, bump; 418, third gear; 419, gear ring; 420, fourth gear; 421, fifth gear; 422, a scraper; 5. drug injection mechanism; 501. drug distribution ring; 502. drug injection pipe; 503. spray hole; 504. drug injection tank; 505. piston; 506. rotating wheel; 507. eccentric shaft; 508. driving frame; 509. connecting rod; 510. drug storage tank; 511. first one-way valve; 512. second one-way valve; 513. second rotating shaft; 514. stirring rod; 515. second scraper; 516. spiral blade; 6. desorption mechanism; 601. accommodating chamber; 602. heating chamber; 603. heating coil; 604. third rotating shaft; 605. second motor; 606. turning plate; 607. feeding pipe; 608. exhaust pipe. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Reference Figure 1-Figure 9As shown, the present invention provides a technical solution: a contaminated soil remediation device, including a remediation box 1, a crushing box 2, a crushing mechanism 4 and a medicine injection mechanism 5, the crushing box 2 is installed on the surface of the remediation box 1, the surface of the crushing box 2 is installed with a feed bin 3 for feeding contaminated soil, the crushing mechanism 4 is installed in the inner cavity of the crushing box 2, and is used to crush the soil, the crushing mechanism 4 includes a first crushing roller 401, a first screen plate 407 and an annular screen plate 414, the first crushing roller 401 is rotatably installed in the inner cavity of the crushing box 2, the inner cavity of the crushing box 2 is rotatably installed with a second crushing roller 402, and the surfaces of the first crushing roller 401 and the second crushing roller 402 are both solid A crushing knife 403 is fixedly installed, and a first motor 404 is fixedly installed on the side wall of the crushing box 2. The output end of the first motor 404 is fixedly connected to one end of the first crushing roller 401, and a first gear 405 is fixedly installed on the other end of the first crushing roller 401. A second gear 406 is fixedly installed on one end of the second crushing roller 402. The first gear 405 is meshed with the second gear 406. The contaminated soil is put into the crushing box 2 through the feed bin 3, and the first motor 404 drives the first crushing roller 401 to rotate, and the first gear 405 and the second gear 406 drive the second crushing roller 402 to rotate in the opposite direction to perform preliminary crushing of the soil.

[0021] Reference Figure 1-Figure 9 As shown, in a preferred embodiment, the first screen plate 407 is slidably installed in the inner cavity of the crushing box 2 for preliminary screening of the soil, a slider 408 is fixedly installed on the side wall of the first screen plate 407, the slider 408 is slidably installed in the inner cavity of the crushing box 2, a first spring 409 is fixedly installed in the inner cavity of the crushing box 2, one end of the first spring 409 is fixedly connected to the slider 408 for driving the first screen plate 407 to move downward, a first rotating shaft 410 is rotatably installed in the inner cavity of the crushing box 2, and a protrusion 411 is symmetrically fixedly installed on the surface of the first rotating shaft 410, and the protrusion 411 is symmetrically fixedly installed on the surface of the first screen plate 407 The first rotating shaft 410 is in contact with each other, a first pulley 412 is fixedly installed at one end of the first rotating shaft 410, and a second pulley 413 is fixedly installed at one end of the second crushing roller 402. A belt is connected between the first pulley 412 and the second pulley 413. Under the action of the first spring 409, the first screen plate 407 is driven to be tightly attached to the surface of the protrusion 411, and when the second crushing roller 402 rotates, the first pulley 412 and the first rotating shaft 410 are driven to rotate synchronously through the second pulley 413, so that the first screen plate 407 is driven to swing up and down through the protrusion 411 to screen the preliminarily crushed soil.

[0022] Reference Figure 1-Figure 9As shown, in a preferred embodiment, an annular screen plate 414 is installed in the inner cavity of the crushing box 2, the aperture of the annular screen plate 414 is smaller than that of the first screen plate 407, and is used for secondary screening of the soil. A mounting seat 415 is rotatably mounted on the surface of the annular screen plate 414, and a rolling roller 416 is symmetrically rotatably mounted on the side wall of the mounting seat 415, and is used for secondary crushing of the soil. A plurality of protrusions 417 are installed on the surface of the rolling roller 416, and a third gear 418 is fixedly mounted on one end of the rolling roller 416. A gear ring 419 is fixedly mounted in the inner cavity of the crushing box 2, and the third gear 418 is meshed with the gear ring 419. A fourth gear 418 is fixedly mounted on the surface of the mounting seat 415. Wheel 420, a fifth gear 421 is fixedly installed on the surface of the first rotating shaft 410, the fifth gear 421 is meshed with the fourth gear 420, and a first scraper 422 is symmetrically fixedly installed on the side wall of the mounting seat 415, the first scraper 422 is in contact with the surface of the annular sieve plate 414, and is used to clean the soil on the surface of the annular sieve plate 414. When the first rotating shaft 410 rotates, the fourth gear 420 and the mounting seat 415 are driven to rotate through the fifth gear 421, and the rolling roller 416 is driven to rotate through the gear ring 419, so as to perform secondary crushing on the soil falling onto the surface of the annular sieve plate 414, thereby improving the uniformity of subsequent mixing of the soil and the repair agent.

[0023] In a preferred embodiment, when in use, the contaminated soil is put into the crushing box 2 through the feed bin 3, the first crushing roller 401 is driven to rotate by the first motor 404, and the second crushing roller 402 is driven to rotate in the opposite direction by the first gear 405 and the second gear 406 to perform preliminary crushing of the soil. Under the action of the first spring 409, the first screen plate 407 is driven to be close to the surface of the protrusion 411, and when the second crushing roller 402 rotates, the first pulley 412 and the first rotating shaft 410 are driven to rotate synchronously by the second pulley 413, so that the first screen plate 407 is driven to swing up and down by the protrusion 411 to screen the preliminary crushed soil, and the soil passing through the first screen plate 407 falls on the surface of the annular screen plate 414, and when the first rotating shaft 410 rotates, the fourth gear 420 and the mounting seat 415 are driven to rotate by the fifth gear 421, and the rolling roller 416 is driven to rotate by the ring gear 419, so that the soil falling on the surface of the annular screen plate 414 is secondary crushed, thereby improving the uniformity of subsequent mixing of the soil and the repair agent.

[0024] Reference Figure 1-Figure 9As shown, in a preferred embodiment, the injection mechanism 5 is installed in the inner cavity of the crushing box 2, and is used to inject the repair agent into the soil. The injection mechanism 5 includes a medicine distribution ring 501, an injection pipe 502 and a spray hole 503. The medicine distribution ring 501 is fixedly installed at the bottom of the annular sieve plate 414, and the side wall of the medicine distribution ring 501 is installed with a medicine injection pipe 502. The side wall of the medicine injection pipe 502 is provided with a spray hole 503 for spraying the repair agent. The side wall of the crushing box 2 is symmetrically fixedly installed with a medicine injection tank 504, and the inner cavity of the medicine injection tank 504 is slidably installed with a Piston 505, a rotating wheel 506 is fixedly installed at one end of the first rotating shaft 410, an eccentric shaft 507 is fixedly installed on the surface of the rotating wheel 506, the eccentric shaft 507 is installed at a non-center position of the rotating wheel 506, a driving frame 508 is sleeved on the surface of the eccentric shaft 507, and a connecting rod 509 is connected between the driving frame 508 and the piston 505. When the first rotating shaft 410 rotates, the driving frame 508 is driven to swing left and right through the eccentric shaft 507, and the piston 505 is driven to reciprocate in the medicine injection tank 504 through the connecting rod 509.

[0025] Reference Figure 1-Figure 9 As shown, in a preferred embodiment, a medicine storage tank 510 is installed on the surface of the repair box 1 for storing the repair agent, and a first one-way valve 511 and a second one-way valve 512 are installed on the side wall of the medicine injection tank 504. The first one-way valve 511 is unidirectionally connected to the inner cavity of the medicine injection tank 504 for liquid inlet, a water pipe is connected between the first one-way valve 511 and the medicine storage tank 510, and the second one-way valve 512 is unidirectionally connected to the outer wall of the medicine injection tank 504 for liquid outlet, and a water pipe is connected between the second one-way valve 512 and the medicine dispensing ring 501. When the piston 505 reciprocates in the medicine injection tank 504, the first one-way valve 5 11 and the second one-way valve 512 are alternately turned on, the repair agent in the medicine storage tank 510 is injected into the medicine distribution ring 501, and is evenly sprayed into the soil from the spray hole 503, a second rotating shaft 513 is fixedly installed at the bottom of the mounting seat 415, a stirring rod 514 is fixedly installed on the side wall of the second rotating shaft 513, which is used to mix the repair agent with the soil, a second scraper 515 is symmetrically fixedly installed on the side wall of the second rotating shaft 513, the second scraper 515 is in contact with the inner wall of the crushing box 2, and is used to clean the soil on the inner wall of the crushing box 2, and a spiral blade 516 is fixedly installed on the surface of the second rotating shaft 513, which is used to send the soil into the repair box 1.

[0026] In a preferred embodiment, when the first rotating shaft 410 rotates, the driving frame 508 is driven to swing left and right through the eccentric shaft 507, and the piston 505 is driven to move back and forth in the injection tank 504 through the connecting rod 509. The first one-way valve 511 and the second one-way valve 512 are alternately turned on, and the repair agent in the medicine storage tank 510 is injected into the medicine distribution ring 501 and evenly sprayed into the soil from the spray hole 503. When the mounting seat 415 rotates, it drives the second rotating shaft 513 to rotate synchronously, and the soil is further mixed through the stirring rod 514 to ensure that the soil and the repair agent are evenly mixed.

[0027] Reference Figure 1-Figure 6 As shown, in a preferred embodiment, a desorption mechanism 6 is installed in the inner cavity of the repair box 1 for heating and desorption of the soil. The desorption mechanism 6 includes a receiving chamber 601 and a heating coil 603. The receiving chamber 601 is arranged in the inner cavity of the repair box 1. A heating chamber 602 is provided in the inner cavity of the repair box 1. A heating coil 603 is installed in the heating chamber 602 for heating the receiving chamber 601. After the soil and the repair agent are mixed, they are sent into the receiving chamber 601 through the spiral blade 516 and heated by the heating coil 603. The soil The temperature is gradually increased, and the high temperature causes organic pollutants in the soil, such as petroleum hydrocarbons, pesticides, volatile organic compounds, etc., to be desorbed from the soil particles. A third rotating shaft 604 is rotatably installed in the inner cavity of the repair box 1, and a second motor 605 is fixedly installed on the side wall of the repair box 1. The output end of the second motor 605 is fixedly connected to one end of the third rotating shaft 604, and a turning plate 606 is installed on the side wall of the third rotating shaft 604 for turning over the soil in the accommodating cavity 601. A discharge pipe 607 is installed on the side wall of the repair box 1, and an exhaust pipe 608 is installed on the surface of the repair box 1.

[0028] In a preferred embodiment, after the soil and the repair agent are mixed, they are sent into the containing chamber 601 through the spiral blade 516, heated by the heating coil 603, and driven by the second motor 605 to rotate the third shaft 604, driving the turning plate 606 to turn the soil in the containing chamber 601 so that it is evenly heated. The soil temperature is gradually increased, and the high temperature causes organic pollutants in the soil, such as petroleum hydrocarbons, pesticides, volatile organic compounds, etc., to be desorbed from the soil particles and carried away by the airflow, discharged from the exhaust pipe 608, and sent to the purification equipment for further purification.

[0029] A contaminated soil remediation method, applicable to the above-mentioned contaminated soil remediation equipment, comprises the following steps: S1: Pretreatment; the contaminated soil is put into the crushing box 2 through the feed bin 3, the first crushing roller 401 and the second crushing roller 402 are driven to rotate by the first motor 404, the soil is preliminarily crushed, and the preliminarily crushed soil is screened by the first sieve plate 407, the soil passing through the first sieve plate 407 falls onto the surface of the annular sieve plate 414, and the soil falling onto the surface of the annular sieve plate 414 is secondary crushed by the rolling roller 416; S2: Injecting medicine; the eccentric shaft 507 drives the driving frame 508 to swing left and right, driving the piston 505 to move back and forth in the injection tank 504, the first one-way valve 511 and the second one-way valve 512 are alternately turned on, the repair agent in the medicine storage tank 510 is injected into the medicine distribution ring 501, and is uniformly sprayed into the soil from the spray hole 503, and when the mounting seat 415 rotates, the second rotating shaft 513 is driven to rotate synchronously, and the soil is further mixed through the stirring rod 514; S3: Desorption; After the soil and the repair agent are mixed, they are sent into the containing chamber 601 through the spiral blade 516, heated by the heating coil 603, and driven by the second motor 605 to rotate the third shaft 604, driving the turning plate 606 to turn the soil in the containing chamber 601, so that it is evenly heated, and the soil temperature is gradually increased. The high temperature causes organic pollutants in the soil, such as petroleum hydrocarbons, pesticides, volatile organic compounds, etc., to be desorbed from the soil particles.

[0030] Specifically, the working principle of the contaminated soil remediation device is as follows: when in use, the contaminated soil is put into the crushing box 2 through the feed bin 3, the first crushing roller 401 is driven to rotate by the first motor 404, and the second crushing roller 402 is driven to rotate in the opposite direction by the first gear 405 and the second gear 406 to perform preliminary crushing of the soil, and under the action of the first spring 409, the first sieve plate 407 is driven to be close to the surface of the protrusion 411, and when the second crushing roller 402 rotates, the first belt pulley 413 is driven to rotate. 12 and the first rotating shaft 410 rotate synchronously, so that the first sieve plate 407 is driven to swing up and down through the protrusion 411 to screen the initially crushed soil, and the soil passing through the first sieve plate 407 falls onto the surface of the annular sieve plate 414. When the first rotating shaft 410 rotates, the fourth gear 420 and the mounting seat 415 are driven to rotate through the fifth gear 421, and the rolling roller 416 is driven to rotate through the ring gear 419, so that the soil falling onto the surface of the annular sieve plate 414 is secondary crushed, thereby improving the uniformity of subsequent mixing of the soil and the repair agent.

[0031] When the first rotating shaft 410 rotates, the driving frame 508 is driven to swing left and right through the eccentric shaft 507, and the piston 505 is driven to move back and forth in the injection tank 504 through the connecting rod 509. The first one-way valve 511 and the second one-way valve 512 are alternately turned on, and the repair agent in the storage tank 510 is injected into the medicine distribution ring 501 and evenly sprayed into the soil from the spray hole 503. When the mounting seat 415 rotates, it drives the second rotating shaft 513 to rotate synchronously, and the soil is further mixed through the stirring rod 514 to ensure that the soil and the repair agent are evenly mixed.

[0032] After the soil and the repair agent are mixed, they are sent into the containing chamber 601 through the spiral blade 516, heated by the heating coil 603, and driven by the second motor 605 to rotate the third shaft 604, driving the turning plate 606 to turn the soil in the containing chamber 601, so that it is heated evenly, and the soil temperature is gradually increased. The high temperature causes organic pollutants in the soil, such as petroleum hydrocarbons, pesticides, volatile organic compounds, etc., to be desorbed from the soil particles and carried away by the airflow, discharged from the exhaust pipe 608, and sent to the purification equipment for further purification.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A contaminated soil remediation device, characterized in that: The invention comprises a repair box (1), a crushing box (2), a crushing mechanism (4) and a drug injection mechanism (5), wherein the crushing box (2) is mounted on the surface of the repair box (1), a feed bin (3) is mounted on the surface of the crushing box (2), and the crushing mechanism (4) is mounted in the inner cavity of the crushing box (2) and is used to crush soil. The crushing mechanism (4) comprises: A first crushing roller (401), the first crushing roller (401) being rotatably mounted in the inner cavity of the crushing box (2); A first screen plate (407), the first screen plate (407) being slidably mounted in the inner cavity of the crushing box (2) and used for preliminary screening of the soil; an annular sieve plate (414), the annular sieve plate (414) being mounted in the inner cavity of the crushing box (2) and used for secondary screening of the soil, a mounting seat (415) being rotatably mounted on the surface of the annular sieve plate (414), a rolling roller (416) being symmetrically rotatably mounted on the side wall of the mounting seat (415) and used for secondary crushing of the soil; The injection mechanism (5) is installed in the inner cavity of the crushing box (2) and is used to inject the repair agent into the soil. The injection mechanism (5) comprises a medicine distribution ring (501), an injection pipe (502) and a spray hole (503). The medicine distribution ring (501) is fixedly installed on the bottom of the annular sieve plate (414). The side wall of the medicine distribution ring (501) is installed with a medicine injection pipe (502), and the side wall of the medicine injection pipe (502) is provided with a spray hole (503).

2. The contaminated soil remediation equipment according to claim 1, characterized in that: A second crushing roller (402) is rotatably mounted in the inner cavity of the crushing box (2); crushing knives (403) are fixedly mounted on the surfaces of the first crushing roller (401) and the second crushing roller (402); a first motor (404) is fixedly mounted on the side wall of the crushing box (2); an output end of the first motor (404) is fixedly connected to one end of the first crushing roller (401); a first gear (405) is fixedly mounted on the other end of the first crushing roller (401); a second gear (406) is fixedly mounted on one end of the second crushing roller (402); and the first gear (405) is meshed with the second gear (406).

3. The contaminated soil remediation equipment according to claim 2, characterized in that: A slider (408) is fixedly mounted on the side wall of the first screen plate (407), and the slider (408) is slidably mounted in the inner cavity of the crushing box (2). A first spring (409) is fixedly mounted in the inner cavity of the crushing box (2), and one end of the first spring (409) is fixedly connected to the slider (408) for driving the first screen plate (407) to move downward. A first rotating shaft (410) is rotatably mounted in the inner cavity of the crushing box (2), and convex blocks (411) are symmetrically fixedly mounted on the surface of the first rotating shaft (410), and the convex blocks (411) are in contact with the surface of the first screen plate (407). A first belt pulley (412) is fixedly mounted on one end of the first rotating shaft (410), and a second belt pulley (413) is fixedly mounted on one end of the second crushing roller (402), and a belt is connected between the first belt pulley (412) and the second belt pulley (413).

4. The contaminated soil remediation equipment according to claim 3, characterized in that: A plurality of protrusions (417) are installed on the surface of the rolling roller (416); a third gear (418) is fixedly installed on one end of the rolling roller (416); a gear ring (419) is fixedly installed in the inner cavity of the crushing box (2); the third gear (418) meshes with the gear ring (419); a fourth gear (420) is fixedly installed on the surface of the mounting seat (415); a fifth gear (421) is fixedly installed on the surface of the first rotating shaft (410); the fifth gear (421) meshes with the fourth gear (420); a first scraper (422) is symmetrically fixedly installed on the side wall of the mounting seat (415); the first scraper (422) contacts the surface of the annular screen plate (414) and is used to clean soil on the surface of the annular screen plate (414).

5. The contaminated soil remediation equipment according to claim 4, characterized in that: A medicine injection tank (504) is symmetrically fixedly mounted on the side wall of the crushing box (2), a piston (505) is slidably mounted in the inner cavity of the medicine injection tank (504), a rotating wheel (506) is fixedly mounted on one end of the first rotating shaft (410), an eccentric shaft (507) is fixedly mounted on the surface of the rotating wheel (506), a driving frame (508) is sleeved on the surface of the eccentric shaft (507), and a connecting rod (509) is connected between the driving frame (508) and the piston (505).

6. The contaminated soil remediation equipment according to claim 5, characterized in that: A medicine storage tank (510) is installed on the surface of the repair box (1) for storing a repair agent, and a first one-way valve (511) and a second one-way valve (512) are installed on the side wall of the medicine injection tank (504); a water pipe is connected between the first one-way valve (511) and the medicine storage tank (510), and a water pipe is connected between the second one-way valve (512) and the medicine dispensing ring (501).

7. The contaminated soil remediation equipment according to claim 6, characterized in that: A second rotating shaft (513) is fixedly mounted on the bottom of the mounting seat (415); a stirring rod (514) is fixedly mounted on the side wall of the second rotating shaft (513) for mixing the repair agent with the soil; a second scraper (515) is symmetrically fixedly mounted on the side wall of the second rotating shaft (513); the second scraper (515) is in contact with the inner wall of the crushing box (2) for cleaning the soil on the inner wall of the crushing box (2); and a spiral blade (516) is fixedly mounted on the surface of the second rotating shaft (513) for sending the soil into the repair box (1).

8. The contaminated soil remediation equipment according to claim 7, characterized in that: The inner cavity of the repair box (1) is equipped with a desorption mechanism (6) for heating and desorption of soil, the desorption mechanism (6) comprising a receiving cavity (601) and a heating coil (603), the receiving cavity (601) being arranged in the inner cavity of the repair box (1), the inner cavity of the repair box (1) being provided with a heating cavity (602), the heating cavity (602) being equipped with a heating coil (603) for heating the receiving cavity (601).

9. The contaminated soil remediation equipment according to claim 8, characterized in that: A third rotating shaft (604) is rotatably mounted in the inner cavity of the repair box (1); a second motor (605) is fixedly mounted on the side wall of the repair box (1); an output end of the second motor (605) is fixedly connected to one end of the third rotating shaft (604); a turning plate (606) is mounted on the side wall of the third rotating shaft (604) for turning over soil in the accommodating cavity (601); a feeding pipe (607) is mounted on the side wall of the repair box (1); and an exhaust pipe (608) is mounted on the surface of the repair box (1).

10. A contaminated soil remediation method, applicable to the contaminated soil remediation equipment according to claim 9, characterized in that: The steps include: S1: pretreatment; the contaminated soil is fed into the crushing box (2) through the feed bin (3); the first crushing roller (401) and the second crushing roller (402) are driven to rotate by the first motor (404) to initially crush the soil; the initially crushed soil is screened by the first sieve plate (407); the soil that passes through the first sieve plate (407) falls onto the surface of the annular sieve plate (414); the soil that falls onto the surface of the annular sieve plate (414) is secondary crushed by the rolling roller (416); S2: injecting medicine; the eccentric shaft (507) drives the driving frame (508) to swing left and right, driving the piston (505) to move back and forth in the medicine injection tank (504); the first one-way valve (511) and the second one-way valve (512) are alternately turned on, and the repair agent in the medicine storage tank (510) is injected into the medicine distribution ring (501) and uniformly sprayed into the soil from the spray hole (503); and when the mounting seat (415) rotates, the second rotating shaft (513) is driven to rotate synchronously, and the soil is further mixed through the stirring rod (514); S3: Desorption; After the soil and the repair agent are mixed, they are sent into the containing chamber (601) through the spiral blade (516), heated by the heating coil (603), and driven by the second motor (605) to rotate the third shaft (604), driving the turning plate (606) to turn the soil in the containing chamber (601), so that the soil is evenly heated, and the soil temperature is gradually increased. The high temperature causes organic pollutants in the soil, such as petroleum hydrocarbons, pesticides, volatile organic compounds, etc., to be desorbed from the soil particles.

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