CN-121244675-B - Soil remediation equipment

CN121244675BCN 121244675 BCN121244675 BCN 121244675BCN-121244675-B

Abstract

The invention relates to soil remediation equipment which comprises a frame, a plow arranged in front of the frame, a rotating shaft arranged behind the frame and positioned at the rear side of the plow, a tillage knife arranged on the rotating shaft, and a spraying pipeline arranged on the rotating shaft, wherein the spraying pipeline is provided with at least one nozzle, and the nozzle is arranged close to the tillage knife so as to spray medicament into soil during tillage operation. Therefore, the plough is arranged in front of the frame to destroy the soil structure in advance, the resistance of the subsequent ploughing knife is reduced, the ploughing knife arranged on the rotary shaft at the rear of the frame rotates at a low speed to reduce the damage of the soil aggregate structure, and meanwhile, the spraying pipeline close to the ploughing knife is arranged on the rotary shaft to spray the medicament into the soil, so that the cooperative structure of 'plough pre-breaking resistance-low-speed ploughing knife soil turning-near knife medicament spraying' is formed, the full turning of deep soil of about 50cm is effectively realized, the uniform mixing of the medicament and deep soil is promoted, and the secondary pollution caused by dust is inhibited from the source.

Inventors

ZHAO YAXUE
XU MEI
LIU FANG
HUANG CHAOJUN
TANG YAN
LI SHIPENG
WANG LIJUN
TIAN YU

Assignees

中国水利水电第九工程局有限公司

Dates

Publication Date: 20260508
Application Date: 20251029

Claims (7)

1. A soil remediation device, comprising: A frame; the plow is arranged in front of the frame and is used for breaking the soil structure in advance so as to reduce the operation resistance of the follow-up tillage knife; The rotary shaft is arranged behind the frame and positioned at the rear side of the plow, a tillage cutter is arranged on the rotary shaft, and the tillage cutter is configured to rotate at a preset low speed so as to reduce the damage of soil aggregate structures; The spraying pipeline is arranged on the rotating shaft and is provided with at least one nozzle, the nozzle is arranged close to the tillage knife so as to spray the chemical into soil during the tillage operation, and the spraying pipeline is connected with an external chemical supply device; One end of the spraying pipeline, which is close to the top of the rotating shaft, is communicated with an external medicament supply device through a rotary sealing joint, the rotary resistance moment of the rotary sealing joint is smaller than 0.5N seed m, and the rotary sealing joint comprises: The shaft assembly adapting part is fixed on the frame and is provided with a rotary adapting hole, the rotary shaft is nested and matched with the rotary adapting hole, and the rotary shaft can rotate relative to the shaft assembly adapting part; A liquid supply upper end cover arranged around the circumference outside of the shaft assembly adapting part, connected with the shaft assembly adapting part and configured to be in butt joint with a conveying pipeline of an external liquid supply device; The hollow connector body is internally provided with an overflow channel for circulating the repairing medicament, the connector body is connected with the upper liquid supply end cover flange, and the inner wall of the connector body is provided with an annular clamping groove; The pipeline is connected with the lower end cover, is arranged around the circumferential outer side of the rotating shaft, is fixedly connected with the rotating shaft, is rotatably arranged in the annular clamping groove, is provided with a penetrating drug passing hole, and is in threaded connection with the drug passing hole and communicated with the flow passage; The pipeline is connected between the lower end cover and the annular clamping groove and is provided with a sealing ring in a rotating way, wherein the sealing ring is made of fluororubber material resistant to chemical corrosion; The rotary sealing joint further comprises a pulse transition plate, wherein an outer flange of the pulse transition plate is fixed on the inner wall of the joint main body, and a through hole for a rotating shaft to pass through is formed in the middle of the pulse transition plate; When the pipeline connection lower end cover rotates relative to the pulse transition plate, each large-aperture hole and each small-aperture hole are sequentially aligned with the medicine passing holes alternately, and the medicine passing holes are controlled to open and close by aperture conversion and blocking of the pulse transition plate, so that the medicine flows through the spraying pipeline in a flow fluctuation mode to form pulse spraying; when the drug passing holes are aligned in a non-porous way, the drug passing holes are blocked by the pulse transition plate, and the medicament is in an energy storage state in the flow passage; When the small-aperture holes are aligned with the medicine passing holes, the medicine enters the spraying pipeline to supplement the medicine but not spray, and the pipeline space of the spraying pipeline is filled; When the large-aperture holes are aligned with the medicine passing holes, the spraying pipeline releases pressure to realize high-pressure spraying.
2. The soil remediation apparatus of claim 1 wherein the spray line is a hollow tube extending axially along the axis of rotation, the tube wall of the spray line tube being laser cut to form a spout.
3. The soil remediation device of claim 2 wherein the minimum aperture of the spout is 5mm and the spout length direction is at an angle of 30 degrees to 60 degrees to the axis of the rotating shaft; and/or the length of the nozzle is 1/5-1/3 of the circumference of the pipe body of the spraying pipeline, the edge of the nozzle is subjected to rounding treatment, and the radius of the rounding is not less than 1mm, so that the turbulence loss during medicament injection is reduced.
4. The soil remediation device of claim 2, wherein at least three spraying pipelines are correspondingly fixed on each rotating shaft, at least three spraying pipelines are fixed on the rotating shafts, the at least three spraying pipelines are circumferentially distributed at intervals along the rotating shafts, and the spraying directions of adjacent groups of nozzles form a coverage overlapping area of 5-15 cm in the soil depth direction.
5. The soil remediation apparatus of claim 1 further including a post-plow spray line disposed on a rear side of the plow, the post-plow spray line being secured to the frame and positioned rearwardly of the plow, the post-plow spray line being provided with a nozzle directed toward the plow blade, the nozzle having a spray range of up to 180 ° for pre-spraying the plow blade operation area with a medicament to assist in wetting the soil and effecting primary mixing of the medicament with the soil by blending action of the plow blade.
6. The soil remediation apparatus of claim 5 wherein the number of nozzles of the post-plow spray line is 1-2, the horizontal spacing of the nozzles from the plow is 10-20cm, and the spray direction of the nozzles is 15-30 ° from horizontal; And/or, the soil remediation equipment further comprises a driving device, the driving device is arranged on the frame, and the driving device drives the rotating shaft to rotate through a belt.
7. The soil restoration apparatus as set forth in claim 1, wherein a plurality of said plows and a plurality of said tilling blades are provided, each of said plows being provided in one-to-one correspondence with each of said rotary shafts, and a spacing between adjacent plows being 30-50cm; And/or the preset low speed of the tillage knife is 80-120 r/min; And/or the tillage cutter is of an arc structure, the angle of the blade part of the tillage cutter is 20-30 degrees, and the distance between adjacent tillage cutters in the axial direction of the rotating shaft is 15-25cm; And/or the minimum linear distance between the nozzle and the tillage cutter is 5cm, and the spraying direction of the nozzle faces the operation track area of the tillage cutter, so that the instant mixing of the medicament and the soil is synchronously realized when the tillage cutter stirs the soil, and the medicament wets the soil to inhibit dust emission; And/or the soil remediation equipment further comprises a soil humidity sensor and a controller, wherein the soil humidity sensor is arranged on one side of the frame, close to the tillage knife, and is used for detecting the real-time humidity of soil in an operation area; the controller is respectively and electrically connected with the soil humidity sensor and the delivery pump of the external medicament supply device, and is configured to adjust the spraying flow of the medicament according to the soil humidity, and increase the spraying flow when the soil humidity is lower than a preset threshold value so as to ensure that the soil humidity meets the dust suppression requirement; And/or the frame is provided with a height adjusting mechanism which is respectively connected with the plow and the rotating shaft and is configured to adjust the depth of penetration of the plow and the rotating shaft through hydraulic drive; And/or the tillage knife is connected with the rotating shaft through a detachable structure, the detachable structure comprises a bolt and a positioning pin, the end part of the tillage knife is provided with a mounting hole matched with the rotating shaft, the positioning pin is used for limiting circumferential rotation of the tillage knife, and the bolt is used for axial fixation; And/or the working depth of the plow is 45-55cm, the soil penetrating end of the plow is provided with a wedge-shaped cutting edge, and the opening angle of the wedge-shaped cutting edge is 25-40 degrees.

Description

Soil remediation equipment Technical Field The invention relates to the technical field of soil remediation machinery, in particular to soil remediation equipment for soil remediation. Background The restoration of heavy metal pollution of soil is an important direction in the field of ecological environment protection, and currently, the main restoration modes comprise chemical agent restoration and thermal desorption restoration. The thermal desorption restoration can remove more than 99% of pollutants, but has the problems of high cost, easy soil sintering, easy soil microorganism extinction and the like, so that the period of restoring the soil to an ecological state such as cultivation is extremely long, and the requirement of quickly restoring the soil ecology is difficult to meet. Therefore, the mode of repairing by adopting chemical agents (such as curing agents) is a main choice for repairing heavy metal contaminated soil due to low cost and convenient operation. In the chemical agent restoration, the chemical agent and the polluted soil are fully mixed by ploughing so as to realize solidification or stabilization of heavy metals. In the prior art, a rotary cultivator is main ploughing equipment, but has obvious defects in soil restoration scenes that (1) deep soil is insufficiently stirred, a heavy metal pollution layer is usually deep to about 50cm, the conventional rotary cultivator can reach the depth, but the stirring of the deep soil is insufficient, so that medicaments are difficult to penetrate into the deep layer and the restoration effect is uneven, (2) the medicaments are insufficiently mixed, the medicaments are sprayed on the ground surface to be mixed with the soil depending on the stirring of a ploughing blade, the mixing defect of the medicaments and the deep soil is further aggravated due to the insufficient stirring of the deep soil, the deep soil is not thoroughly restored, dust pollution is serious, dry soil is severely disturbed in the tillage process, a large amount of dust containing heavy metal is generated, secondary pollution is diffused, and (4) the soil structure is damaged, the soil aggregate structure is excessively broken, the soil is hard to harden, the permeability is poor, the water-retaining and fertilizer-retaining capacity is reduced, the subsequent ecological restoration is unfavorable, the mixing effect is poor when the rotating speed of the blades is too slow, the mixing effect is not guaranteed, the medicaments and the soil aggregate structure is seriously damaged, and the dust is hard to balance. Disclosure of Invention In order to solve the problems in the prior art, the invention provides soil restoration tillage equipment capable of achieving deep soil stirring, full mixing of medicaments, dust emission reduction and soil structure protection, so as to improve the restoration efficiency and ecological restoration effect of heavy metal contaminated soil. The present application provides a soil remediation device comprising: A frame; the plow is arranged in front of the frame and is used for breaking the soil structure in advance so as to reduce the operation resistance of the follow-up tillage knife; The rotary shaft is arranged behind the frame and positioned at the rear side of the plow, and a tillage cutter is arranged on the rotary shaft and is configured to rotate at a preset low speed so as to reduce the damage of soil aggregate structures; The spraying pipeline is arranged on the rotating shaft and is provided with at least one nozzle, the nozzle is arranged close to the tillage knife so as to spray the chemical into soil during tillage operation, and the spraying pipeline is connected with an external chemical supply device. In one embodiment, the spraying pipeline is a hollow pipe body extending along the axial direction of the rotating shaft, and the pipe wall of the pipe body of the spraying pipeline is cut by laser to form a nozzle. In one embodiment, the minimum caliber of the nozzle is not smaller than 5mm, and the included angle between the length direction of the nozzle and the axis of the rotating shaft is 30-60 degrees; and/or the length of the nozzle is 1/5-1/3 of the circumference of the pipe body of the spraying pipeline, the edge of the nozzle is subjected to rounding treatment, and the radius of the rounding is not less than 1mm, so that the turbulence loss during medicament injection is reduced. In one embodiment, at least three spraying pipelines are correspondingly fixed on each rotating shaft, at least three spraying pipelines are fixed on the rotating shafts, at least three spraying pipelines are distributed at intervals along the circumferential direction of the rotating shafts, and the spraying directions of the adjacent groups of nozzles form a coverage overlapping area of 5-15cm in the depth direction of soil. In one embodiment, the end of the spraying pipeline near the top of the rotating shaft is communicated with an exte