CN111203434B

CN111203434B - Contaminated soil crushing, mixing and repairing equipment

Info

Publication number: CN111203434B
Application number: CN202010140406.5A
Authority: CN
Inventors: 陈辉霞; 赖冬麟; 董玉明; 乔萌; 刘宏辉; 段跃伟; 黄涛; 郝辉锋; 徐红彬
Original assignee: Yuhuan Environment Technology Co ltd; Institute of Process Engineering of CAS
Current assignee: Yuhuan Environment Technology Co ltd; Institute of Process Engineering of CAS
Priority date: 2020-03-03
Filing date: 2020-03-03
Publication date: 2021-10-19
Anticipated expiration: 2040-03-03
Also published as: CN111203434A

Abstract

The invention provides a polluted soil crushing, mixing and repairing device, and relates to a soil repairing device, which comprises a rack, a double-layer cylinder, a stirring shaft and a plurality of stirring sheets, wherein the double-layer cylinder is arranged on the rack; the double-layer cylinder is respectively connected with a heat medium supply assembly and a refrigerant receiving assembly; the stirring shaft is rotationally connected to the rack and penetrates through the double-layer cylinder body, a first cavity is arranged in the stirring shaft, and the stirring shaft is respectively connected with the heating medium supply assembly and the refrigerant receiving assembly; the stirring sheet is internally provided with a second cavity communicated with the first cavity, and the outer end of the stirring sheet is provided with a spiral feeding part. According to the contaminated soil crushing, mixing and repairing equipment provided by the invention, the soil temperature is effectively increased by using the heat medium in the interlayer of the double-layer cylinder, the soil can be effectively heated while being crushed by using the stirring body in combination with the introduction of the heat medium in the first cavity and the second cavity, a stable temperature is provided for the reaction of the liquid medicine and the soil, the crushing of the soil and the reaction of the liquid medicine are effectively integrated, and the repairing efficiency of the soil is improved.

Description

Contaminated soil crushing, mixing and repairing equipment

Technical Field

The invention belongs to soil remediation equipment, and particularly relates to polluted soil crushing, mixing and remediation equipment.

Background

With the continuous acceleration of the industrialization process, the soil is seriously polluted on the basis of unreasonable mining of mineral resources, smelting discharge of the mineral resources, long-term sewage irrigation and sludge application to the soil, application of chemical fertilizers and pesticides and the like. Soil pollution can be roughly divided into two categories, namely inorganic pollutants and organic pollutants, wherein the inorganic pollutants are mainly expressed as heavy metal pollutants, and the organic pollutants are mainly expressed as petroleum, pesticides and the like. Soil remediation is often required to address such contamination. Soil remediation refers to the physical, chemical and biological processes used to transfer, absorb, degrade and transform pollutants in soil to reduce their concentration to acceptable levels, or to transform toxic and harmful pollutants into harmless materials.

Currently, the soil remediation process includes soil excavation, screening, crushing, liquid medicine addition, mixing, reaction and maintenance. However, when repairing the viscous soil, it is necessary to first crush and stir the soil and then perform the reaction between the chemical solution and the soil, and since the reaction between the chemical solution and the soil needs to have a certain temperature, the above-mentioned operation process is relatively independent, and the soil repairing efficiency is low.

Disclosure of Invention

The invention aims to provide a contaminated soil crushing, mixing and repairing device, which aims to solve the technical problems that the soil crushing is independent in a liquid medicine reaction process and the repairing efficiency is low in the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that: the device comprises a frame, a double-layer cylinder, a stirring shaft and a plurality of stirring sheets; the double-layer barrel is arranged on the rack, the double-layer barrel is respectively connected with a heating medium supply assembly and a cooling medium receiving assembly, and a liquid inlet, a material inlet and a material outlet are respectively arranged on the double-layer barrel; the stirring shaft is arranged in the double-layer cylinder, two ends of the stirring shaft respectively penetrate through the double-layer cylinder and are rotationally connected with the rack, a first cavity is arranged in the stirring shaft, one end of the stirring shaft is connected with the heat medium supply assembly, and the other end of the stirring shaft is connected with the refrigerant receiving assembly; the stirring pieces are respectively arranged on the periphery of the stirring shaft, a second cavity communicated with the first cavity is formed in each stirring piece, and the outer ends of the stirring pieces are provided with spiral feeding portions used for guiding soil to one side of the discharge port.

As another embodiment of the application, at least two stirring shafts are arranged in parallel in the horizontal direction, and the rotating directions of two adjacent stirring shafts are opposite.

As another embodiment of the application, a plurality of stirring blades on the same stirring shaft are arranged in a staggered manner in the axial direction of the stirring shaft.

As another embodiment of the present application, the thickness of the stirring blade gradually decreases from the side of the stirring shaft in the rotation direction to the side of the stirring shaft in the rotation direction.

As another embodiment of the application, the stirring piece is further provided with an auxiliary piece close to one side of the rotation direction of the stirring shaft, the auxiliary piece is arranged at the radial outer end of the stirring piece, and the plate surface of the auxiliary piece is arranged in parallel to the main shaft of the stirring shaft.

As another embodiment of the application, a first pipe and a second pipe which are used for communicating the first cavity with the second cavity are respectively arranged between the stirring shaft and the stirring sheet, the first pipe and the second pipe respectively extend along the radial direction of the stirring shaft, and the rotating directions of the first pipe and the second pipe are the same as the rotating direction of the stirring shaft.

As another embodiment of the present application, the outer end of the first tube extends into the second chamber, and the outer end of the second tube is flush with the outer wall of the stirring shaft.

As another embodiment of this application, still be equipped with the inner tube in the (mixing) shaft, the inner chamber of inner tube is the third chamber, and the inner tube passes through rotary joint and refrigerant receiving component intercommunication, and the second pipe is used for communicateing third chamber and second chamber, and first pipe is used for communicateing first chamber and second chamber.

As another embodiment of the application, the bottom of the inner cavity of the double-layer cylinder body is provided with a bulge extending along the axial direction of the stirring shaft, and the bulge is positioned below one side adjacent to the two stirring shafts.

As another embodiment of this application, still be equipped with in the double-deck barrel and be used for linking to each other with the inlet and along the axial setting's of (mixing) shaft first spray pipe, be equipped with the first nozzle that the opening set up downwards on the first spray pipe.

The contaminated soil crushing, mixing and repairing equipment provided by the invention has the beneficial effects that: compared with the prior art, the contaminated soil crushing, mixing and repairing equipment provided by the invention has the advantages that the heat medium is introduced into the interlayer of the double-layer cylinder by using the heat medium supply assembly, so that the temperature of the soil in the double-layer cylinder is effectively increased, the soil is effectively heated by combining the heating action of the stirring shaft and the stirring sheet on the soil, the viscosity of the soil is reduced, the crushing efficiency is further improved, and meanwhile, the reaction temperature of the soil and the liquid medicine is also ensured; the liquid inlet can integrate the subsequent addition of the liquid medicine and the stirring of the soil in the double-layer cylinder, thereby realizing the continuity of the soil remediation process, avoiding the problem of soil turnover and improving the remediation efficiency of the soil; the spiral feeding portion conveys the soil after stirring and adding the medicine to discharge port one side, realizes the orderly discharge of soil, has improved operating efficiency, has guaranteed prosthetic going on in order.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a schematic view of a partial cross-sectional structure of a contaminated soil crushing, mixing and remediation device according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of A-A of FIG. 1;

FIG. 3 is a schematic view of the structure of FIG. 2 along direction B;

FIG. 4 is a schematic left side sectional view of another embodiment of the stirring shaft and stirring vanes of FIG. 1.

Wherein, in the figures, the respective reference numerals:

100. a frame; 111. a liquid inlet; 112. a feed inlet; 113. a discharge port; 200. a double-layer cylinder body; 210. a protrusion; 220. a first spray pipe; 221. a first spray outlet; 300. a stirring shaft; 310. a drive member; 311. a motor; 312. a transmission gear; 320. a rotary joint; 330. a first chamber; 340. an inner tube; 350. a third chamber; 410. a stirring sheet; 420. a second chamber; 430. a first tube; 440. a second tube; 450. an auxiliary sheet; 460. a spiral feeding part; 500. a heating medium supply assembly; 600. a refrigerant receiving assembly; 700. a discharging collection box; 710. a second spray pipe; 711. and a second spray outlet.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 4 together, the contaminated soil crushing, mixing and remediating apparatus provided by the present invention will now be described. The polluted soil crushing, mixing and repairing equipment comprises a rack 100, a double-layer cylinder 200, a stirring shaft 300 and a plurality of stirring blades 410; the double-layer cylinder 200 is arranged on the rack 100, the double-layer cylinder 200 is respectively connected with the heating medium supply assembly 500 and the cooling medium receiving assembly 600, and the double-layer cylinder 200 is respectively provided with a liquid inlet 111, a liquid inlet 112 and a liquid outlet 113; the stirring shaft 300 is rotatably connected to the frame 100 and penetrates through the double-layer cylinder 200, a first cavity 330 is arranged in the stirring shaft 300, one end of the stirring shaft 300 is connected with the heating medium supply assembly 500, and the other end of the stirring shaft 300 is connected with the refrigerant receiving assembly 600; the plurality of stirring blades 410 are arranged on the periphery of the stirring shaft 300, a second cavity 420 communicated with the first cavity 330 is arranged in each stirring blade 410, and a spiral feeding part 460 used for guiding soil to one side of the discharge hole 113 is arranged at the outer end of each stirring blade 410. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or be indirectly on the other element. It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings and are used merely for convenience in describing and simplifying the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus are not to be considered limiting of the present invention. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a number" means two or more unless specifically limited otherwise.

Compared with the prior art, the contaminated soil crushing, mixing and repairing equipment provided by the invention has the advantages that the heat medium is introduced into the interlayer of the double-layer cylinder 200 by using the heat medium supply assembly 500, the temperature of the soil in the double-layer cylinder 200 is effectively increased, the heating effect of the soil by the stirring shaft 300 and the stirring sheet 410 is realized by combining the heat medium filled in the first cavity 330 and the second cavity 420, the soil is effectively heated, the viscosity of the soil is reduced, and the crushing efficiency is further improved; the liquid inlet 111 is arranged to integrate the subsequent liquid medicine addition and the soil stirring into the double-layer cylinder 200, so that the soil temperature is increased, the subsequent reaction with the liquid medicine is ensured to be rapid and effective, and the reaction efficiency is improved. The device avoids the turnover problem caused by the respective crushing and reaction processes of the soil, realizes the continuity of the soil remediation process and improves the remediation efficiency of the soil; spiral pay-off portion 460 carries soil to discharge gate 113 one side, realizes the orderly discharge of soil, has improved operating efficiency, has guaranteed prosthetic orderly the going on.

In this embodiment, the first chamber 330 of (mixing) shaft 300 and the second chamber 420 of stirring piece 410 communicate each other, and the hot medium in heat medium supply assembly 500 passes through rotary joint 320 and carries to (mixing) shaft 300 and the stirring piece 410 that links to each other with (mixing) shaft 300 in, realizes the effective heating to the inside soil of double-deck barrel 200 through the contact of soil and double-deck barrel 200, has improved the temperature of soil, has reduced the viscidity of soil, is convenient for follow-up even stirring of carrying on. In the stirring process, the soil is turned over through the rotation of the stirring sheet 410, the soil is contacted with the stirring sheet 410, and the heating interface is continuously updated, so that the soil is fully heated and heated, and the temperature required by the reaction of the soil and the liquid medicine is effectively ensured.

In this embodiment, a heating medium supplying assembly 500 is connected to an end of the stirring shaft 300 near the feeding port 112, a cooling medium receiving assembly 600 is arranged at an end near the discharging port 113, and the stirring shaft 300 is connected to the above components through a rotary joint 320, so as to realize input and output and discharge of a heating medium, thereby achieving effective heating of soil.

The heat transfer to the soil by the above structure is not directly heated by contacting the heat carrier (such as hot steam) with the soil, but the heat medium is introduced into the interlayer of the double-layer cylinder 200, the first cavity 330 of the stirring shaft 300 and the second cavity 420 of the stirring blade 410, and the heat medium can be hot steam, hot water or heat transfer oil, which is convenient for carrying heat. The double-layer cylinder body 200, the stirring shaft 300 and the stirring sheet 410 realize heating of soil through heat conduction of the wall surface, the mode avoids influence on soil caused by introduction of other substances, meanwhile, the heat utilization rate of equipment is also improved, and the double-layer cylinder body has the characteristics of energy conservation and high efficiency.

The feed inlet 112 above the double-layer cylinder 200 is used for feeding soil to be treated into the double-layer cylinder 200, and the liquid inlet 111 is used for feeding liquid medicine into the double-layer cylinder 200, so that the soil and the liquid medicine are fully contacted and mixed, and the rapid and comprehensive reaction between the soil and the liquid medicine is ensured.

In this embodiment, the spiral feeding portion 460 is disposed at the outer end of the stirring blade 410, so that the soil is transported along the spiral direction of the spiral feeding portion 460 toward the discharge port 113, and the soil is not only stirred and crushed, but also fully mixed and reacted with the liquid medicine during transportation.

As a specific implementation manner of the embodiment of the present invention, referring to fig. 1 to fig. 3, at least two stirring shafts 300 are arranged in parallel in the horizontal direction, and the rotation directions of two adjacent stirring shafts 300 are opposite. In order to improve the effective stirring of the soil in the double-layer cylinder 200 and increase the soil treatment capacity of the double-layer cylinder 200, two stirring shafts 300 are provided in the double-layer cylinder 200. Two (mixing) shafts 300 are the form of horizontal parallel arrangement, can carry out intensive mixing to the inside soil of double-deck barrel 200, avoid taking place the bottom deposit. This setting mode can also avoid influencing the top liquid medicine and spray to the soil upper surface.

In this embodiment, the rotation directions of the two stirring shafts 300 are opposite, and the rotation directions can be set to be respectively from two outer sides to adjacent one side or respectively from adjacent one side to two outer sides, so that the soil on two sides can be symmetrically turned over, and the phenomenon that the double-layer cylinder body 200 is toppled due to uneven stress caused by the same rotation directions of the two stirring shafts is avoided.

Further, the rotation directions of the two stirring shafts 300 are opposite, and the soil on the two sides of the center axis of the double-layer cylinder 200 can be disturbed to the middle of the double-layer cylinder 200 through the stirring blades 410, so that the uniformity of soil mixing at each point position is improved, and meanwhile, the full mixing of the liquid medicine and the soil is promoted.

Referring to fig. 1 to 3, as a specific implementation manner of the embodiment of the present invention, a plurality of stirring blades 410 on the same stirring shaft 300 are arranged alternately in the axial direction of the stirring shaft 300. In this embodiment, the stirring blades 410 are distributed in a staggered manner on both sides of the axis of the same stirring shaft 300, that is, only one stirring blade 410 is arranged on the same axial position of the stirring shaft 300, another stirring blade 410 is arranged on another axial position with a certain distance, and the projections of the two stirring blades 410 in the axial direction of the stirring shaft 300 are uniformly distributed in the circumferential direction of the stirring shaft 300.

Under the condition that the two stirring shafts 300 rotate relatively, in order to avoid position interference of the stirring blades 410 on the two stirring shafts 300 in the stirring process, the stirring blades 410 on the same stirring shaft 300 are arranged in a staggered mode in the axial direction, and the stirring blade 410 on the other stirring shaft 300 is positioned in the middle of two axially adjacent stirring blades 410 on the previous stirring shaft 300, so that the stirring blades 410 are staggered in the axial direction of the stirring shaft 300, and equipment damage caused by position interference between the stirring blades 410 is avoided. The stirring pieces 410 are arranged on the stirring shaft 300 in a staggered manner, and each point on the axial direction of the stirring shaft 300 can have relatively balanced stirring and mixing capacity. The projections of the two adjacent stirring blades 410 in the axial direction of the stirring shaft 300 are uniformly distributed on the periphery of the stirring shaft 300, so that the uniformity of axial distribution is ensured, and the comprehensiveness of circumferential cutting is ensured.

In this embodiment, the shape of stirring piece 410 is fan-shaped in the ascending projection of the axial of (mixing) shaft 300, two adjacent stirring pieces 410 distribute respectively in the both sides of (mixing) shaft 300 on same (mixing) shaft 300, be equivalent to distribute a stirring piece 410 respectively in the both sides of (mixing) shaft 300, this fan-shaped stirring piece 410 has both guaranteed the joint strength with (mixing) shaft 300, the setup of the inside second chamber 420 of also being convenient for simultaneously, be favorable to increasing the area of contact of stirring piece 410 with soil, improve the heating power to soil, guarantee that soil reaches the temperature of fully reacting with the liquid medicine.

As an embodiment of the present invention, referring to fig. 1 to 3, the thickness of the stirring blade 410 gradually decreases from one side of the rotation direction of the stirring shaft 300 to the other side of the rotation direction of the stirring shaft 300. The thickness of each point on a single stirring piece 410 is different, and the thickness of the stirring piece 410 is larger toward one side near the rotating direction and is smaller toward one side near the rotating direction. That is, the thickness of the edge of the fan-shaped agitating blade 410, which is first in contact with the soil, is minimized, enabling efficient cutting of the soil. As the rotation progresses, the thickness of the stirring blade 410 contacting the portion of soil becomes gradually larger, thereby achieving the cutting effect on the object like an axe. The different structural style of above-mentioned thickness can realize avoiding the problem of broken bad power to the effective cutting of soil.

Due to the change of the thickness, two side surfaces of the stirring piece 410 present inclined planes with a certain inclination, and when the inclined planes rotate along with the stirring shaft 300, the soil can not only have the impact effect with the inclined planes, but also be easy to automatically clear the soil on the inclined planes. The structure avoids the adhesion between the soil and the stirring pieces 410, and simultaneously can strengthen the heat transfer effect of the stirring pieces 410 to the soil by continuously updating the heat transfer surface, so the structure belongs to a high-efficiency heat conduction structure.

As a specific implementation manner of the embodiment of the present invention, referring to fig. 1 to fig. 3, an auxiliary blade 450 is further disposed on one side of the stirring blade 410, which is close to the rotation direction of the stirring shaft 300, the auxiliary blade 450 is disposed at the radial outer end of the stirring blade 410, and the plate surface of the auxiliary blade 450 is disposed parallel to the main axis of the stirring shaft 300. The setting of auxiliary plate 450 not only can realize the effective promotion to the soil in the double-deck barrel 200, can also realize beating the effect of beating to knocking of soil, realizes the great impact force to soil, guarantees the crushing effect to soil. Supplementary piece 450 sets up and is close to coming to one side of (mixing) shaft 300 direction of rotation at stirring piece 410, and when stirring piece 410 kept away from the side of supplementary piece 450 one side and cut soil, supplementary piece 450 can also beat the soil that does not cut and shake garrulously, and then realizes good crushing effect.

By means of the auxiliary pieces 450 on the stirring pieces 410, heated soil is pushed to the side surface of the inner wall of the double-layer cylinder 200 from the middle shaft of the double-layer cylinder 200, and is lifted upwards from the side surface of the inner wall, passes over the stirring shaft 300 and is conveyed to the middle shaft position of the double-layer cylinder 200, so that the soil in the double-layer cylinder 200 is fully disturbed, and the uniformity of crushing and mixing is improved.

A driving part 310 is arranged on the stirring shaft 300, and the driving part 310 comprises a motor 311 and a transmission gear 312; the motor 311 is arranged on the frame 100; the input shaft of the transmission gear 312 is connected with the output shaft of the motor 311 and is used for being meshed with a gear arranged at the shaft end of the stirring shaft 300. In this embodiment, the motor 311 drives the transmission gear 312 to rotate, and further drives the stirring shaft 300 to rotate.

Further, the number of the stirring shafts 300 may be one, two, or four, and the plurality of stirring shafts 300 are arranged in parallel on the horizontal plane. If four stirring shafts 300 are provided, four transmission gears 312 are correspondingly arranged from the output ends of the motors 311 to respectively drive the four stirring shafts 300, and four motors 311 can also be arranged to respectively drive the four stirring shafts 300.

As a specific implementation manner of the embodiment of the present invention, referring to fig. 2 to 3, a first tube 430 and a second tube 440 for communicating the first chamber 330 with the second chamber 420 are respectively disposed between the stirring shaft 300 and the stirring blade 410, the first tube 430 and the second tube 440 respectively extend along the radial direction of the stirring shaft 300, and the rotational direction arrangement of the first tube 430 and the second tube 440 is the same as the rotational direction of the stirring shaft 300. The length of the first tube 430 is greater than the length of the second tube 440. The first pipe 430 is used for conveying the heat medium in the first cavity 330 to the second cavity 420, in the process of stirring the soil by the stirring piece 410, the heat medium in the second cavity 420 is condensed into a cold medium by cooling, and under the rotation action of the stirring piece 410, the cold medium flows from the outer end of the second pipe 440 to the stirring shaft 300, so that the cold medium flows out of the stirring shaft 300, and the cold medium is prevented from being accumulated in the stirring piece 410 to influence the effective heating of the soil by the stirring piece 410.

Referring to fig. 2, as a specific implementation manner of the embodiment of the present invention, the outer end of the first pipe 430 extends into the second chamber 420, and the outer end of the second pipe 440 is flush with the outer wall of the stirring shaft 300. The outer end of the first tube 430 extends toward the outer circumference of the agitating blade 410, and protrudes into the second chamber 420, for effectively guiding the heat medium into the agitating blade 410. The heat medium in the first pipe 430 is thrown into the stirring blades 410 by the rotation of the stirring blades 410, and the cold medium accumulated in the stirring blades 410 is thrown into the second pipe 440 and flows into the stirring shaft 300. Then, under the action of the heat medium sequentially fed into the stirring shaft 300, the cold medium sequentially exits from the other end of the stirring shaft 300 and enters the refrigerant receiving assembly 600 through the rotary joint 320.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 4, an inner tube 340 is further disposed in the stirring shaft 300, an inner cavity of the inner tube 340 is a third cavity 350, and the inner tube 340 is communicated with the refrigerant receiving assembly 600 through the rotary joint 320; the second tube 440 is used to communicate the third chamber 350 with the second chamber 420, and the first tube 430 is used to communicate the first chamber 330 with the second chamber 420. In this embodiment, the effective separation of the cooling medium from the heating medium is achieved by separately providing the inner pipe 340. The heat medium in the first cavity 330 of the stirring shaft 300 enters the second cavity 420 of the stirring blade 410 through the first pipe 430, the temperature of the part of the heat medium is reduced through the contact between the stirring blade 410 and the soil, and the part of the heat medium enters the third cavity 350 of the inner pipe 340 through the second pipe 440 along with the rotation of the stirring shaft 300 and is then conveyed to the refrigerant receiving assembly 600 through the rotary joint 320.

As a specific implementation manner of the embodiment of the present invention, referring to fig. 1 to 2, a protrusion 210 extending along the axial direction of the stirring shaft 300 is disposed at the bottom of the inner cavity of the double-layer cylinder 200, and the protrusion 210 is located below the adjacent side of the two stirring shafts 300. In order to avoid the situation that the stirring of the two stirring shafts 300 is not in place in the process of relative rotation, the stirring blades 410 stir the soil in the double-layer cylinder 200 to generate local stirring dead angles, the protrusions 210 are arranged on the inner bottom surface of the double-layer cylinder 200, gaps are uniformly arranged between the surfaces of the protrusions 210 and the stirring blades 410, the consistency of the space, which can be radiated by the inner wall of the double-layer cylinder 200 and the stirring blades 410, is ensured, the internal soil can be fully stirred, and meanwhile, the soil conveying efficiency is favorably improved.

Further, the protrusion 210 is arranged below the middle part of the adjacent side of the two stirring shafts 300, so that dead corners caused by accumulation of soil at the position are avoided. The bottom of the double-layer cylinder 200 is provided with the protrusion 210, so that dead corners at positions where the stirring blades 410 cannot reach below the two stirring shafts 300 are avoided. The protrusions 210 also cooperate with the stirring blades 410 to deliver soil. When the stirring blades 410 on the two stirring shafts 300 rotate simultaneously, the soil can be sufficiently stirred.

The cross section of the inner cavity of the double-layer cylinder 200 is omega-shaped, the parts on two sides are respectively used for matching with the stirring blades 410 on the two stirring shafts 300 on two sides, and a small gap is ensured between the outer ends of the stirring blades 410 and the upper surface of the bulge 210, so that the bulge 210 can avoid soil accumulation and cannot interfere with the movement of the stirring blades 410.

As a specific implementation manner of the embodiment of the present invention, referring to fig. 1 to 3, a first spraying pipe 220 connected to the liquid inlet 111 and disposed along an axial direction of the stirring shaft 300 is further disposed in the double-layer cylinder 200, and the first spraying pipe 220 is provided with a first spraying port 221 having a downward opening. The liquid medicine in the liquid inlet 111 enters the first spraying pipe 220 in the double-layer cylinder 200, and the liquid medicine is uniformly sprayed to the surface of the soil through the first spraying port 221, so that the liquid medicine and the soil are effectively mixed in the process of crushing the soil. The first spray opening 221 adopts an atomizing nozzle, so that the uniformity of spraying is ensured.

In this embodiment, the discharge port 113 is connected to the discharge collecting box 700, the top of the inner side of the discharge collecting box 700 is provided with a second spraying pipe 710, and the second spraying pipe 710 is provided with a second spraying port 711 with a downward opening. The second spraying pipe 710 in the discharging collection box 700 is used for spraying the discharged soil and suppressing dust during discharging.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Contaminated soil crushing mixing and repair equipment, its characterized in that includes:

a frame;

the double-layer barrel is arranged on the rack and provided with an interlayer, the double-layer barrel is connected with a heating medium supply assembly and a cooling medium receiving assembly which are communicated with the interlayer, and the double-layer barrel is provided with a liquid inlet, a liquid inlet and a liquid outlet which extend to the interior of the double-layer barrel;

the stirring shafts are arranged in the inner cavity of the double-layer barrel, two ends of each stirring shaft penetrate through the double-layer barrel respectively and are connected with the rack in a rotating mode, a first cavity is arranged in each stirring shaft, at least two stirring shafts are arranged in parallel in the horizontal direction, the rotating directions of every two adjacent stirring shafts are opposite, and one end of each stirring shaft is connected with the heat medium supply assembly; and

the stirring blades are respectively arranged on the periphery of the stirring shaft, a second cavity is formed in each stirring blade, and a spiral feeding part for guiding soil to one side of the discharge hole is arranged at the outer end of each stirring blade;

an inner tube is further arranged in the stirring shaft, the inner cavity of the inner tube is a third cavity, the inner tube is communicated with the refrigerant receiving assembly through a rotary joint, the third cavity is communicated with the second cavity through a second tube, the first cavity is communicated with the second cavity through a first tube, the first tube and the second tube respectively extend along the radial direction of the stirring shaft, and the rotating direction arrangement of the first tube and the second tube is the same as the rotating direction of the stirring shaft; the outer end of the first pipe extends into the second cavity, and the outer end of the second pipe is flush with the outer wall of the stirring shaft.

2. A contaminated soil crushing, mixing and remediating apparatus as recited in claim 1, wherein said plurality of said stirring blades on the same said stirring shaft are staggered in the axial direction of said stirring shaft.

3. The contaminated soil crushing, mixing and remediating apparatus as set forth in claim 1, wherein the thickness of the agitating blade is gradually reduced from a side from the rotation direction of the agitating shaft to a side from the rotation direction of the agitating shaft.

4. A contaminated soil crushing, mixing and remediating apparatus as recited in claim 1, wherein an auxiliary piece is further provided on a side of said stirring piece adjacent to a rotation direction of said stirring shaft, said auxiliary piece being provided at a radially outer end of said stirring piece and a plate surface of said auxiliary piece being provided in parallel to a main axis of said stirring shaft.

5. A contaminated soil crushing, mixing and remediating apparatus as recited in claim 1, wherein a bottom of the inner chamber of said double-layered cylinder is provided with a projection extending in an axial direction of said stirring shafts, said projection being located below an adjacent side of two of said stirring shafts.

6. The contaminated soil crushing, mixing and remediating apparatus as recited in claim 1, wherein a first spraying pipe is further disposed in the double-layered cylinder, the first spraying pipe being connected to the liquid inlet and being disposed along an axial direction of the stirring shaft, and the first spraying pipe is provided with a first spraying port having a downward opening.