CN114682622B

CN114682622B - Multifunctional main repairing device and organic contaminated soil repairing device and method thereof

Info

Publication number: CN114682622B
Application number: CN202210348361.XA
Authority: CN
Inventors: 张帅; 朱利中
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2022-04-01
Filing date: 2022-04-01
Publication date: 2022-12-13
Anticipated expiration: 2042-04-01
Also published as: CN114682622A

Abstract

The invention discloses multifunctional main repairing equipment and an organic contaminated soil repairing device and method thereof, and belongs to the field of environment-friendly equipment. The equipment comprises a feeding unit, a repairing unit and an unloading unit; the repair unit comprises a box body shell, a box body bottom plate and a top cover, and a repair chamber is defined by the box body shell, the box body bottom plate and the top cover; a bearing bottom plate fixed on the box shell is arranged above the box bottom plate, and an air inlet pipe and at least two first bearing bases are supported and fixed on the bearing bottom plate; a hollow shaft is vertically arranged on the first bearing base, and a helical blade for stirring materials is coaxially fixed on the outer side of the hollow shaft; the dosing device, the hollow shaft and the helical blade are communicated to form a dosing passage together; the unloading unit comprises a hydraulic system and an inclined plate, and the hydraulic system is used for controlling the opening and closing of the bottom plate of the box body; when the bottom plate of the box body is opened downwards, the bottom plate and the inclined plate can jointly form a slope for sliding materials. The invention can realize in-situ ex-situ remediation of single or composite organic contaminated soil and has the functions of soil remediation and conditioning.

Description

Multifunctional main repairing device and organic contaminated soil repairing device and method thereof

Technical Field

The invention relates to the technical field of polluted soil treatment and restoration, in particular to multifunctional restoration main equipment and an organic polluted soil restoration device and method thereof.

Background

Soil, as an important production and environmental element, is one of the natural resources on which humans and the natural environment live. With the rapid development of economy, frequent industrial activities have led to the introduction of large amounts of organic pollutants into the soil environment. The organic pollutants have carcinogenic, teratogenic and mutagenic risks to life bodies, are not easy to degrade under natural conditions, can migrate and convert among different media, and have higher environmental risks. Remediation of organically-polluted soil is one of the key points of current environmental protection work. The organic contaminated soil remediation method comprises a physical method (gas phase extraction and thermal desorption), a chemical method (leaching and oxidation reduction), a biological method (microorganisms and plants) and the like. The physical method can effectively restore high-concentration volatile and semi-volatile organic polluted soil, the chemical method can effectively restore high-concentration non-volatile organic polluted soil, and the biological method can effectively restore low-concentration easily-degradable organic polluted soil. However, due to the complexity of industrial activities, the persistence of organic pollutants in the soil, and the diversity of pollution sources, most organic soil pollution presents as a complex pollution. Aiming at the composite pollution, the single soil remediation technology cannot achieve the remediation goal.

According to different places set by the remediation engineering, the remediation work of the organic contaminated soil can be divided into in-situ remediation and ex-situ remediation. The in-situ remediation is to directly restore the organic polluted soil without moving the organic polluted soil, and is economic and effective without building, digging, conveying and transporting and dismantling site buildings. However, due to the heterogeneity of soil, the in-situ remediation of the organic contaminated soil has uncertainty and longer remediation time. The ectopic remediation is realized by excavating and transporting the organic contaminated soil to a remediation infrastructure for centralized treatment, the process is controllable, and the remediation period is short. But the transportation cost is high, and the escape of organic pollutants is easy to generate in the excavation and transportation processes, thereby causing secondary pollution.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide multifunctional repairing main body equipment and an organic contaminated soil repairing device and method thereof. The organic contaminated soil remediation device can be loaded in the container to realize the mobilization, and has strong mobility and flexibility. The in-situ ex-situ remediation of the organic contaminated soil can be effectively realized, and meanwhile, the multifunctional remediation device can realize the combination of remediation technologies, so that the composite organic contaminated soil can be effectively remedied.

The invention adopts the following specific technical scheme:

in a first aspect, the present invention provides a multifunctional repairing main body apparatus, including a feeding unit, a repairing unit, and an unloading unit; the feeding unit is used for crushing and conveying materials to be processed to the repairing unit, and an outlet of the feeding unit is communicated with an inlet of the repairing unit;

the repair unit comprises a box body shell, a box body bottom plate and a top cover; the bottom of the box shell is connected with a box bottom plate capable of opening downwards, the top of the box shell is fixed with a top cover, and the box bottom plate, the top cover and the top cover jointly form a repairing chamber; the box body shell is of a cylindrical multilayer structure and sequentially comprises a heat conduction layer, a heating layer and a heat insulation layer from inside to outside, fans for promoting the air flow in the repair chamber are arranged in the heat conduction layer at intervals, and a screen layer for blocking impurities is arranged at an air outlet of each fan; the top cover is provided with an air outlet communicated with the repair chamber, and a bearing bottom plate fixed on the shell of the box body is arranged above the box body bottom plate; the bearing bottom plate is of a porous frame structure, and is fixedly supported with an air inlet pipe and at least two first bearing bases; the air inlet pipe is provided with a plurality of aeration holes for aerating the materials above, and one end of the air inlet pipe is communicated with an external air blowing device through an air inlet arranged on the shell of the box body; a hollow shaft is vertically arranged on the first bearing base, and a helical blade for stirring materials is coaxially fixed on the outer side of the hollow shaft; the helical blade is hollow and communicated with the hollow shaft, and a plurality of dosing holes are uniformly formed in the helical blade; the top of the hollow shaft penetrates through the top cover and is connected with a second speed reducing motor fixed above the top cover, and the second speed reducing motor can drive the hollow shaft to rotate; a dosing device is also arranged on the hollow shaft above the top cover; the dosing device, the hollow shaft and the helical blade are communicated to form a dosing passage for dosing materials in the repair cavity;

the unloading unit comprises a hydraulic system and an inclined plate, and the hydraulic system is used for controlling the opening and closing of the bottom plate of the box body; the inclined plate is positioned below the bottom plate of the box body, and the bottom of the inclined plate is provided with a discharge hole; when the bottom plate of the box body is opened downwards, the bottom plate and the inclined plate can jointly form a slope for sliding the materials.

Preferably, the feeding unit is of a box-type structure with a feeding chamber and comprises a crushing roller, a gear, a first conveyor belt, a feeding hopper and an inclined table; the top of the feeding cavity is open and is provided with a feeding hopper, the cross section of which is gradually enlarged from bottom to top, and at least two crushing rollers for crushing and feeding are arranged below the feeding hopper side by side; a first conveying belt which can be driven by a gear to convey is arranged below the crushing roller; the front end of the first conveyor belt is positioned below the crushing roller and used for receiving crushed and dropped materials, and the tail end of the first conveyor belt is connected with the top surface of the sloping table; the bottom surface of the sloping platform is positioned at the inlet of the repairing unit, and the materials conveyed by the first conveyor belt can be conveyed into the repairing unit by the sloping platform.

Furthermore, a first rotating shaft connected with a first speed reduction motor is coaxially fixed at the center of the crushing roller, and the first speed reduction motor can drive the crushing roller to rotate through the first rotating shaft; the first conveyor belt is provided with at least two second rotating shafts, gears connected with the first speed reducing motors are fixed at two ends of each second rotating shaft respectively, and the first speed reducing motors can drive the second rotating shafts to rotate through the gears so as to realize transmission of the first conveyor belt.

Preferably, a feed port plate connected with the mechanical assembly is arranged at the inlet of the repair unit, and the mechanical assembly can control the opening and closing of the inlet through the feed port plate; the feeding unit is fixedly connected with the repairing unit through a supporting frame.

Preferably, the air inlet pipe is of an annular tubular structure arranged on the inner periphery of the repair chamber, a plurality of aeration holes are formed in one side of the air inlet pipe, and a shielding plate used for preventing soil from entering holes of the air inlet pipe is fixedly mounted at the top of the air inlet pipe.

Preferably, a filter screen is covered at the air outlet; a one-way valve only used for discharging liquid is arranged on the medicine adding hole of the spiral blade; and a plurality of stirring paddles which do not interfere with the helical blades are also arranged in the box body shell, and the stirring paddles are used for assisting the helical blades to stir materials.

Preferably, a box body support is fixed at the bottom of the repair unit, and a hydraulic system and an inclined plate are arranged on the box body support; the hydraulic system comprises a hydraulic base, a hydraulic cylinder and a second bearing base; a hydraulic base is fixed at the bottom of the box body support, at least one hydraulic cylinder is fixed on the hydraulic base, and a piston rod of the hydraulic cylinder is connected with a second bearing base fixed at the bottom of the box body bottom plate through a rod head bearing so as to control the opening and closing of the box body bottom plate.

Preferably, the discharge port is provided with a second conveyor belt for conveying the materials falling from the discharge port, and the second conveyor belt can convey the materials to the dump truck.

In a second aspect, the invention provides an organic contaminated soil remediation device, which comprises a heat exchanger, a dust removal device, a solid waste temporary storage device, a tail gas purification device, a tail gas absorption device, a waste liquid collection device and multifunctional remediation main body equipment according to any one of the first aspect;

the air outlet on the multifunctional repairing main body equipment is sequentially communicated with the heat exchanger and the dust removal device through pipelines; a solid phase outlet of the dust removal device is connected with the solid waste temporary storage device, and a gas-liquid outlet is connected with the tail gas absorption device through a pipeline provided with a vacuum pump and an online detector; a gas phase outlet of the tail gas absorption device is communicated with a tail gas purification device, the gas phase outlet of the tail gas purification device is discharged into the atmosphere through a chimney, and an online detector is arranged at the chimney; and a waste liquid outlet of the tail gas absorption device is communicated with a waste liquid collection device.

In a third aspect, the invention provides an organic contaminated soil remediation method using the organic contaminated soil remediation device according to the second aspect, which specifically comprises the following steps:

crushing the organic contaminated soil to be repaired in the feeding unit, opening an inlet of the repairing unit, and conveying the crushed soil into the repairing unit through the inlet; when feeding is carried out in the repairing unit, the second speed reducing motor drives the hollow shaft to drive the helical blades to rotate, so that the entered soil is uniformly filled in the repairing chamber; when the soil filling height in the repairing cavity reaches a set value, closing inlets of the feeding unit and the repairing unit, stopping feeding, and enabling the repairing cavity to be in a closed state; starting a heating layer, a fan, a blowing device, a vacuum pump and a dosing device, wherein the heating layer uniformly heats the polluted soil, and the fan promotes hot air to flow in the remediation chamber; the air blowing device provides stripping gas through the air inlet pipe, and the vacuum pump extracts tail gas through the air outlet, so that the stripping gas can flow through soil from bottom to top; adding the agent into a dosing device, and then injecting the agent into the soil through a dosing passage, wherein the agent is uniformly mixed with the soil due to the rotation of the helical blade; the tail gas extracted from the gas outlet enters a heat exchanger to reduce the temperature, and then enters a dust removal device to separate solid particles in the tail gas; the separated solid substance enters a solid waste temporary storage device, and the gas enters a tail gas absorption device to remove organic pollutants in the gas; the waste liquid generated by the tail gas absorption device is periodically discharged into a waste liquid collection device, and the gas treated by the tail gas absorption device enters a tail gas purification device and is then discharged into the atmosphere through a chimney; the hydraulic system regularly controls the opening of the bottom plate of the box body, and the soil which is repaired in the repairing unit and reaches the standard is discharged out of the multifunctional repairing main body equipment through the inclined plate and the discharge hole so as to be subjected to subsequent treatment.

Compared with the prior art, the invention has the following beneficial effects:

the method can realize the reinforced coupling of different organic contaminated soil remediation technologies, has strong operability, solves the problems of long process, single function, poor flexibility and the like of the traditional combination mode, and meets the remediation requirements of the composite organic contaminated soil in different fields. The invention has the functions of repairing the polluted soil and conditioning the physical property of the soil. The method is guided by the recovery of the soil reaching the standard for reuse, selects proper additives (microbial inoculum, organic matters, biochar and the like), conditions the physical properties of the soil, recovers the damaged function and achieves the aim of green recovery. The feeding unit and the repairing unit are structurally optimized to form a closed space, so that the problem of escape of volatile pollutants and fly ash in the transmission-repairing process is effectively solved, and the problem of secondary pollution is avoided. According to the invention, different rotation programs are set for the helical blades and the stirring paddles according to the functional requirements, so that the soil and the additive are fully mixed, the soil is prevented from being immobilized, and the problem of dead zones in the repairing process is solved. According to the main repairing device, all functional units are linked to homogenize the soil to be repaired, and the soil is homogeneous; the energy field and the pressure field in the repairing unit are uniformly distributed, the repairing process is normalized, ordered and controllable, and the repairing efficiency is improved. . In addition, the tail gas treatment device arranged behind the device can uniformly collect and treat the three wastes generated in the repair process, and has small environmental influence. The movable assembly mode has good maneuverability and can effectively finish the centralized, scattered and emergency organic polluted soil remediation work.

Drawings

FIG. 1 is a first isometric schematic view of a multi-functional prosthetic body device;

FIG. 2 is a second isometric schematic view of the multi-functional prosthetic body device;

FIG. 3 isbase:Sub>A schematic sectional view (base:Sub>A) andbase:Sub>A schematic sectional view A-A (b) ofbase:Sub>A multifunctional prosthetic body device;

FIG. 4 is a schematic cross-sectional view (a) and a schematic cross-sectional view B-B (B) of a multifunctional prosthetic body device;

FIG. 5 is a schematic view of a first construction of the apparatus for remediating organically-contaminated soil;

FIG. 6 is a schematic diagram of a second construction of the organic contaminated soil remediation device;

reference numerals: 1. a feed unit; 101. a feed hopper; 102. a first reduction motor; 103. a crushing roller; 104. a first rotating shaft; 105. a first conveyor belt; 106. a second rotation shaft; 107. a gear; 108. a sloping table; 109. a support frame; 2. a repair unit; 201. a top cover; 202. a case body shell; 203. a box body bottom plate; 204. a second reduction motor; 205. a dosing device; 206. a water outlet; 207. a water inlet; 208. an air outlet; 209. an air inlet; 210. a feed inlet plate; 211. a mechanical assembly; 212. a first hinge; 213. a hollow shaft; 214. a helical blade; 215. a stirring paddle; 216. a first bearing mount; 217. a shielding plate; 218. an air inlet pipe; 219. a bearing bottom plate; 220. a heat-insulating layer; 221. a heat conductive layer; 222. a heating layer; 223. a fan; 224. a screen layer; 225. a sensor; 3. an unloading unit; 301. a box body support; 302. a sloping plate; 303. a discharge port; 304. a hydraulic base; 305. a hydraulic cylinder; 306. a piston rod; 307. a second hinge; 308. a second bearing mount; 4. a heat exchanger; 5. a dust removal device; 6. a solid waste temporary storage device; 7. a vacuum pump; 8. an on-line detector; 9. a tail gas purification device; 10. a tail gas absorption device; 11. a waste liquid collection device; 12. a power distribution cabinet; 13. a console; 14. a chimney; 15. a container; 16. a blower device; 17. a second conveyor belt; 18. a dump truck; 19. multifunctional repair main body equipment.

Detailed Description

The invention is further illustrated and described below with reference to the drawings and the detailed description. The technical features of the embodiments of the present invention can be combined correspondingly without mutual conflict.

The invention can effectively treat the volatile and semi-volatile organic contaminated soil, sets the pretreatment procedure according to the specific situation of the contaminated soil, and carries out treatment after carrying out excavation, drying and other treatments on the soil in advance.

In the present embodiment, the orientation of the case of the multifunction prosthetic device is expressed as "upper", "lower", "left", "right", "front", and "rear". Specifically, reference may be made to the drawing direction of fig. 1. Wherein, the medicine adding device is positioned above, the box body bracket is positioned below, the feeding unit is positioned behind, and the discharge hole is positioned in front. The heating layers are located on the left, right, front and back (inside the housing).

The following describes in detail the implementation manner of the mobile integrated multifunctional contaminated soil remediation device in this embodiment.

As shown in fig. 1 and 2, the multifunctional repairing main body equipment provided by the invention is of a box-type structure and mainly comprises a feeding unit 1, a repairing unit 2 and an unloading unit 3. Wherein, feeding unit 1, repair unit 2 and uninstallation unit 3 three communicate in proper order, and feeding unit 1 is arranged in carrying out broken handling with the soil of treating, carries broken soil to repair unit 2 afterwards in, and repair unit 2 is arranged in the concrete restoration of soil to take care of and handles, and uninstallation unit 3 is arranged in the multi-functional restoration main part equipment of soil discharge that finishes of repairing in repair unit 2.

The feeding unit 1 is used for conveying the material to be processed to the repairing unit 2 in a crushing way, and the outlet of the feeding unit is communicated with the inlet of the repairing unit 2. In this embodiment, the feeding unit 1 is a sleeve box type structure having a feeding chamber, and includes a crushing roller 103, a gear 107, a first conveyor belt 105, a feed hopper 101, and a ramp 108. The top of the feeding chamber is open and is provided with a feeding hopper 101 with a cross section gradually enlarged from bottom to top, and at least two crushing rollers 103 for crushing the feeding material are arranged below the feeding hopper 101 side by side. A first conveyor belt 105 which can be driven and conveyed by a gear 107 is arranged below the crushing roller 103. The first conveyor belt 105 has a front end located below the crushing roller 103 for receiving the crushed falling material and a rear end connected to the top surface of the ramp 108. The bottom surface of the sloping platform 108 is located at the inlet of the repairing unit 2, the materials transported by the first conveyor belt 105 can be conveyed into the repairing unit 2 through the sloping platform 108, and the structure of the sloping platform 108 is beneficial to contaminated soil entering the repairing unit 2 and preventing the soil from being accumulated at the outlet of the feeding unit 1. A first rotating shaft 104 connected to the first gear motor 102 is coaxially fixed at the center of the crushing roller 103, and the first gear motor 102 can drive the crushing roller 103 to rotate via the first rotating shaft 104. At least two second rotating shafts 106 are arranged on the first conveyor belt 105, gears 107 connected with the first speed reduction motor 102 are respectively fixed at two ends of the second rotating shafts 106, and the first speed reduction motor 102 can drive the second rotating shafts 106 to rotate through the gears 107 so as to realize transmission of the first conveyor belt 105. When the feeding unit 1 with the structure is actually applied, organic contaminated soil is added into the feeding hopper 101, the first speed reducing motor 102 drives the adjacent crushing rollers 103 to rotate in the opposite direction so as to crush large soil particles, the crushed soil falls onto the first conveying belt 105, meanwhile, the first speed reducing motor 102 drives the first conveying belt 105 to convey the crushed organic contaminated soil, and the soil falls onto the ramp 108 and then enters the repairing unit 2.

Further, a feed port plate 210 is provided at an inlet of the cabinet case of the repair unit 2, and the feed port plate 210 is fixed to the cabinet case by a first hinge 212. A mechanical assembly 211 (e.g., a robotic arm) is fixedly mounted to the feed port plate and controls the rotation thereof. In the operation process of the feeding unit 1, the feeding port plate is opened, the mechanical arm 211 drives the feeding port plate 210 to rotate to the position of the outlet of the feeding unit 1 so as to form a sealed space together with the inclined table 108, so that the feeding unit and the repairing unit form a sealed space, and the unorganized emission of flying dust and organic pollutants in the feeding process is effectively prevented; when the feeding unit 1 stops operating, the robot arm 211 drives the feeding port plate 210 to close the inlet of the repair unit 2, so that the repair unit 2 forms a closed space.

In order to make the connection between the feeding unit 1 and the recovery unit 2 more firm, at least two support frames 109 may be provided between the feeding unit 1 and the recovery unit 2, as shown in fig. 3. The supporting frame 109 may be a frame structure with a triangular cross section, one right-angle side is fixed at the bottom of the feeding unit 1, and the other right-angle side is fixed at the side wall of the inlet of the repair unit 2.

As shown in fig. 3, the repair unit 2 is a box structure, and mainly includes a box housing 202, a box bottom plate 203, and a top cover 201. The bottom of the box body shell 202 is connected with a box body bottom plate 203 which can be opened downwards, the top of the box body shell is fixed with a top cover 201, and the three jointly form a repairing cavity. In practical applications, one side of the base 203 of the box body can be connected and fixed to the bottom of the box body housing 202 by a second hinge 307 so as to be turned downward and opened.

As shown in fig. 4, the box housing 202 is a cylindrical multi-layer structure, and includes a heat conduction layer 221, a heating layer 222, and an insulation layer 220 in sequence from inside to outside, a fan 223 for promoting air flow in the repair chamber is disposed at an interval in the heat conduction layer 221, and a mesh layer 224 for blocking impurities is disposed at an air outlet of the fan 223. In practical application, the mesh layer 224 can prevent soil particles in the repair chamber from entering the cavity of the fan 223; the fan 223 is used to promote convection of hot air in the repair chamber to blow the hot air into the repair unit 2; the heat conducting layer 221, the heating layer 222 and the heat insulating layer 220 sequentially ensure the heat to be transferred, generated and not dissipated. In order to make the heat transfer more uniform, in the present embodiment, eight fans 223 are respectively installed on the front and rear surfaces of the repair chamber, so that the flow of the hot air in the repair chamber is more uniform.

An air outlet 208 communicated with the repairing chamber is formed in the top cover 201, and a bearing bottom plate 219 fixed on the box shell 202 is arranged above the box bottom plate 203. In this embodiment, the outlet 208 is covered with a screen. The bearing bottom plate 219 is a porous frame structure, and is supported and fixed with the air inlet pipe 218 and at least two first bearing bases 216, and the bearing bottom plate 219 is used for preventing the air inlet pipe 218 and the first bearing bases 216 from falling off when the box bottom plate 203 is opened. The air inlet pipe 218 is provided with a plurality of aeration holes for aerating the materials above, one end of the air inlet pipe is communicated with an external air blowing device 16 through an air inlet 209 arranged on the box body shell 202, and the air blowing device 16 can provide air for the repairing cavity through the air inlet pipe 218. In this embodiment, the air inlet pipe 218 is configured as an annular tubular structure and surrounds the inner periphery of the repair chamber, and a plurality of aeration holes are formed in one side of the air inlet pipe 218, so that the uniform distribution of the stripping gas around the circumference is facilitated; a shielding plate 217 is fixedly mounted on the top of the air inlet pipe 218 to prevent soil from entering the hole of the air inlet pipe 218.

The first bearing base 216 is vertically provided with a hollow shaft 213, the outer side of the hollow shaft 213 is coaxially fixed with a helical blade 214 for stirring materials, and the helical blade 214 is arranged around the outer side of the hollow shaft 213 from bottom to top. The spiral blade 214 is hollow, the hollow interior of the spiral blade 214 is communicated with the hollow interior of the hollow shaft 213, a plurality of dosing holes are uniformly formed in the spiral blade 214, and the hollow interior of the spiral blade 214 is communicated with the repairing chamber through the dosing holes. The top of the hollow shaft 213 passes through the top cover 201 and is connected to a second reduction motor 204 fixed above the top cover 201, and the second reduction motor 204 can rotate the hollow shaft 213. A dosing device 205 is also provided on the hollow shaft 213 above the cap 201. The medicine adding device 205, the hollow shaft 213 and the helical blade 214 are communicated to form a medicine adding passage for adding medicine to the materials in the repair cavity together. In the use process, the medicament is added into the dosing device, flows through the hollow shaft, enters the spiral body, is injected into the organic contaminated soil through the orifice, and the one-way valve can effectively prevent soil particles from entering the spiral body.

In this embodiment, the surface of the helical blade 214 is uniformly provided with holes in an array manner, and the orifice is fixedly provided with a one-way valve, so that the liquid medicine can only flow outwards through the medicine feeding passage; the upper part of the medicine adding device is provided with a water inlet 207 for adding liquid medicine, and the lower part is provided with a water outlet 206 for discharging liquid and emptying. A plurality of paddles 215 which do not interfere with the helical blades 214 are arranged inside the box body shell 202, and the paddles 215 are used for assisting the helical blades 214 in stirring the materials. In order to make the heat transfer more uniform, in this embodiment, three stirring paddles 215 are installed inside the case housing 201 for stirring the soil. Three sensors 225 are mounted through the housing 201 of the box for recording the temperature, moisture content and pressure of the soil during remediation.

The unloading unit 3 includes a hydraulic system for controlling opening and closing of the box bottom plate 203, and a swash plate 302. The inclined plate 302 is positioned below the bottom plate 203 of the box body, and the bottom of the inclined plate is provided with a discharge hole 303. When the box bottom plate 203 is opened downwards, the inclined plate 302 and the box bottom plate 203 can form a slope for sliding materials.

In this embodiment, a tank bracket 301 is fixed to the bottom of the repair unit 2, and a hydraulic system and a swash plate 302 are provided on the tank bracket 301. The hydraulic system includes a hydraulic mount 304, a hydraulic cylinder 305, and a second bearing mount 308. A hydraulic base 304 is fixed at the bottom of the box body support 301, at least one hydraulic cylinder 305 is fixed on the hydraulic base 304, and a piston rod 306 of the hydraulic cylinder 305 is connected with a second bearing base 308 fixed at the bottom of the box body bottom plate 203 through a rod head bearing so as to control the opening and closing of the box body bottom plate 203. The inclined plate is arranged in the diagonal direction of the box body support, a hole with the same size as the repair unit box body bottom plate is formed in the inclined plate and used for accommodating the turned box body bottom plate, and the discharging port 303 is formed in the front of the box body support. The discharge port is provided with a second conveyor belt 17 matched with the unloading unit, and the repaired up-to-standard soil is conveyed to a dump truck 18, so that the vehicle transportation is facilitated.

Based on the multifunctional main repairing equipment 19, the invention also designs a tail gas treatment process matched with the multifunctional main repairing equipment, and the tail gas treatment process jointly form an organic polluted soil repairing device. As shown in fig. 5 and 6, the organic contaminated soil remediation device comprises a heat exchanger 4, a dust removal device 5, a solid waste temporary storage device 6, a tail gas purification device 9, a tail gas absorption device 10, a waste liquid collection device 11 and a multifunctional remediation main body device 19.

Wherein, the air outlet 208 on the multifunctional restoration main body equipment 19 is communicated with the heat exchanger 4 and the dust removing device 5 in turn through pipelines. The heat exchanger 4 is used for reducing the temperature of the tail gas, and the dust removal device 5 is used for removing solid particles in the tail gas. The solid phase outlet of the dust removing device 5 is connected with the solid waste temporary storage device 6, and the gas-liquid outlet is connected with the tail gas absorption device 10 through a pipeline provided with a vacuum pump 7 and an online detector 8. The gas phase outlet of the tail gas absorption device 10 is communicated with the tail gas purification device 9, the gas phase outlet of the tail gas purification device 9 is discharged into the atmosphere through a chimney 14, and an online detector 8 is arranged at the chimney 14. The waste liquid outlet of the tail gas absorption device 10 is communicated with the waste liquid collection device 11. The vacuum pump 7 provides power for conveying the tail gas, the separated tail gas is conveyed to a tail gas absorption device 10 through the vacuum pump 7, and meanwhile, an online monitoring device 8 is connected to a pipeline to measure the concentration of pollutants in the tail gas; the tail gas absorption device 10 is filled with organic acid solution to absorb organic pollutants in the tail gas, so that the purpose of purification is achieved; the tail gas purification device 9 is filled with activated carbon to further purify organic matters which cannot be absorbed; the purified tail gas is discharged into the atmosphere through a chimney 14, and an online monitoring device 8 is connected to the pipeline to measure the concentration of pollutants in the tail gas. The pipeline is provided with a valve, a flowmeter, a pressure gauge and the like.

In this embodiment, the organic contaminated soil remediation device realizes unified power supply and automation control through the power distribution cabinet 12 and the console 13, and the whole set of device is integrally installed in the container 15, so that the whole device is movable and has strong flexibility.

The organic contaminated soil remediation method using the organic contaminated soil remediation device specifically comprises the following steps:

the organic contaminated soil to be repaired is crushed in the feeding unit 1, the inlet of the repairing unit 2 is opened, and the crushed soil is conveyed into the repairing unit 2 through the inlet. While feeding the materials into the repairing unit 2, the second speed reducing motor 204 drives the hollow shaft 213 to drive the helical blades 214 to rotate, so that the entered soil is uniformly filled in the repairing chamber. When the soil filling height in the repairing cavity reaches a set value, the inlets of the feeding unit 1 and the repairing unit 2 are closed, feeding is stopped, and the repairing cavity is in a closed state. And starting the heating layer 222, the fan 223, the air blowing device 16, the vacuum pump 7 and the medicine adding device 205, uniformly heating the polluted soil by the heating layer 222, and promoting the hot air to flow in the repairing chamber by the fan 223. The blowing device 16 provides the stripping gas through the gas inlet pipe 218, and the vacuum pump 7 extracts the tail gas through the gas outlet 208, so that the stripping gas can flow through the soil from bottom to top. The agent is added to the dosing device 205 and then injected into the soil through the dosing passageway, where it is uniformly mixed with the soil due to the rotating action of the helical blades 214. The tail gas extracted through the gas outlet 208 enters the heat exchanger 4 to reduce the temperature, and then enters the dust removing device 5 to separate solid particles in the tail gas. The separated solid substance enters a solid waste temporary storage device 6, and the gas enters a tail gas absorption device 10 to remove organic pollutants in the gas. The waste liquid generated by the tail gas absorption device 10 is periodically discharged into the waste liquid collection device 11, and the gas treated by the tail gas absorption device 10 enters the tail gas purification device 9 and is then discharged into the atmosphere through the chimney 14. The hydraulic system controls the opening of the box body bottom plate 203 periodically, and the soil which is repaired in the repairing unit 2 and reaches the standard is discharged out of the multifunctional repairing main body equipment 19 through the inclined plate 302 and the discharge hole 303 for subsequent treatment.

Specifically, the blowing device 16 and the vacuum pump 7 work together to make the blowing gas flow through the organic contaminated soil, and the soil is repaired by a gas phase extraction technology. In the process of blowing off, the heating layer 222 and the fan 223 are connected to heat the soil to a set temperature, a feedback loop is formed with the front sensor 225 of the box body, the temperature is accurately controlled, and the organic contaminated soil is repaired by a thermal desorption technology. The chemical adding device 205, the hollow shaft 213 and the spiral body 214 in the repairing unit form a communicating unit, a circulating heat source can be filled in the communicating unit for auxiliary heating, the communicating unit and the heating layer 222 together heat the organic contaminated soil, and the organic contaminated soil is repaired by a heat-enhanced gas phase extraction and thermal desorption technology. The communicating unit can also inject redox agents into the organic polluted soil, and the organic polluted soil is repaired by a chemical redox technology; the communicating unit can also inject microbial inoculum into the organic contaminated soil, and the organic contaminated soil is repaired by the microbial technology. Besides, the multifunctional repairing device can flexibly realize the combination of the repairing technologies by setting different operation parameters. The soil conditioning function refers to that for the conditions of change of physical and chemical properties of treated soil, reduction of production capacity and the like, the communicating unit can add microbial inoculum, organic matters, biochar and the like into the soil after the soil is repaired to reach the standard to realize the soil conditioning function.

The above-described embodiments are merely preferred embodiments of the present invention, which should not be construed as limiting the invention. Various changes and modifications may be made by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present invention. Therefore, the technical solutions obtained by means of equivalent substitution or equivalent transformation all fall within the protection scope of the present invention.

Claims

1. The multifunctional repairing main body equipment is characterized by comprising a feeding unit (1), a repairing unit (2) and an unloading unit (3); the feeding unit (1) is used for crushing and conveying materials to be treated to the repairing unit (2), and an outlet of the feeding unit is communicated with an inlet of the repairing unit (2);

the repair unit (2) comprises a box body shell (202), a box body bottom plate (203) and a top cover (201); the bottom of the box body shell (202) is connected with a box body bottom plate (203) capable of opening downwards, the top of the box body shell is fixed with a top cover (201), and the box body bottom plate, the top cover and the top cover jointly form a repairing chamber; the box body shell (202) is of a cylindrical multilayer structure and sequentially comprises a heat conduction layer (221), a heating layer (222) and a heat insulation layer (220) from inside to outside, fans (223) used for promoting air flow in the repair chamber are arranged in the middle of the heat conduction layer (221) at intervals, and a screen layer (224) used for blocking impurities is arranged at an air outlet of each fan (223); an air outlet (208) communicated with the repairing chamber is formed in the top cover (201), and a filter screen covers the air outlet (208); a box body support (301) is fixed at the bottom of the repair unit (2), and a hydraulic system and an inclined plate (302) are arranged on the box body support (301); the hydraulic system comprises a hydraulic base (304), a hydraulic cylinder (305) and a second bearing base (308); a hydraulic base (304) is fixed at the bottom of the box body support (301), at least one hydraulic cylinder (305) is fixed on the hydraulic base (304), and a piston rod (306) of the hydraulic cylinder (305) is connected with a second bearing base (308) fixed at the bottom of the box body bottom plate (203) through a rod head bearing so as to control the opening and closing of the box body bottom plate (203);

a bearing bottom plate (219) fixed on the box shell (202) is arranged above the box bottom plate (203); the bearing bottom plate (219) is a porous frame structure, and an air inlet pipe (218) and at least two first bearing bases (216) are supported and fixed on the bearing bottom plate; the air inlet pipe (218) is of an annular tubular structure arranged on the inner periphery of the repair chamber, a plurality of aeration holes are formed in one side of the air inlet pipe (218), and a shielding plate (217) used for preventing soil from entering holes of the air inlet pipe (218) is fixedly mounted at the top of the air inlet pipe (218); the air inlet pipe (218) is provided with a plurality of aeration holes for aerating materials above, and one end of the air inlet pipe is communicated with an external air blowing device (16) through an air inlet (209) arranged on the box body shell (202);

a hollow shaft (213) is vertically arranged on the first bearing base (216), and a helical blade (214) for stirring materials is coaxially fixed on the outer side of the hollow shaft (213); the helical blade (214) is hollow and communicated with the hollow shaft (213), and a plurality of dosing holes are uniformly distributed on the helical blade; a one-way valve which can only be used for discharging liquid is arranged on the medicine feeding hole of the spiral blade (214); a plurality of stirring paddles (215) which do not interfere with the helical blades (214) are also arranged in the box body shell (202), and the stirring paddles (215) are used for assisting the helical blades (214) in stirring materials; the top of the hollow shaft (213) penetrates through the top cover (201) and is connected with a second speed reducing motor (204) fixed above the top cover (201), and the second speed reducing motor (204) can drive the hollow shaft (213) to rotate; a dosing device (205) is also arranged on the hollow shaft (213) positioned above the top cover (201); the medicine adding device (205), the hollow shaft (213) and the helical blade (214) are communicated to form a medicine adding passage for adding medicine to the material in the repair cavity together;

the unloading unit (3) comprises a hydraulic system and an inclined plate (302), wherein the hydraulic system is used for controlling the opening and closing of the box body bottom plate (203); the inclined plate (302) is positioned below the bottom plate (203) of the box body, and the bottom of the inclined plate is provided with a discharge hole (303); when the bottom plate (203) of the box body is opened downwards, the bottom plate and the inclined plate (302) can form a slope for sliding materials.

2. The multifunctional repair body device according to claim 1, wherein the feeding unit (1) is a box-type structure with a feeding chamber, comprising a crushing roller (103), a gear (107), a first conveyor belt (105), a feeding hopper (101) and a ramp (108); the top of the feeding chamber is open and is provided with a feeding hopper (101) with the cross section gradually enlarged from bottom to top, and at least two crushing rollers (103) for crushing and feeding are arranged below the feeding hopper (101) side by side; a first conveying belt (105) which can be driven by a gear (107) to convey is arranged below the crushing roller (103); the front end of the first conveyor belt (105) is positioned below the crushing roller (103) and is used for receiving crushed and dropped materials, and the tail end of the first conveyor belt is connected with the top surface of the sloping table (108); the bottom surface of the sloping platform (108) is positioned at the inlet of the repairing unit (2), and the materials transported by the first conveyor belt (105) can be conveyed into the repairing unit (2) through the sloping platform (108).

3. The multifunctional repairing main body equipment according to claim 2, wherein a first rotating shaft (104) connected with a first speed reduction motor (102) is coaxially fixed at the center of the crushing roller (103), and the first speed reduction motor (102) can drive the crushing roller (103) to rotate through the first rotating shaft (104); at least two second rotating shafts (106) are arranged on the first conveying belt (105), gears (107) connected with the first speed reduction motor (102) are fixed to two ends of each second rotating shaft (106), and the first speed reduction motor (102) can drive the second rotating shafts (106) to rotate through the gears (107) so as to achieve transmission of the first conveying belt (105).

4. The multifunctional repairing main body equipment according to claim 1, wherein an inlet plate (210) connected with a mechanical assembly (211) is arranged at an inlet of the repairing unit (2), and the mechanical assembly (211) can control the opening and closing of the inlet through the inlet plate (210); the feeding unit (1) and the repairing unit (2) are fixedly connected through a supporting frame (109).

5. The multifunctional repairing body equipment according to claim 1, wherein a second conveyor belt (17) for conveying the materials dropped from the discharge port (303) is arranged at the discharge port (303), and the second conveyor belt (17) can convey the materials to a dump truck (18).

6. An organic contaminated soil remediation device, which is characterized by comprising a heat exchanger (4), a dust removal device (5), a solid waste temporary storage device (6), a tail gas purification device (9), a tail gas absorption device (10), a waste liquid collection device (11) and multifunctional remediation main body equipment (19) as claimed in any one of claims 1 to 5;

an air outlet (208) on the multifunctional repairing main body equipment (19) is sequentially communicated with the heat exchanger (4) and the dust removal device (5) through pipelines; a solid phase outlet of the dust removal device (5) is connected with a solid waste temporary storage device (6), and a gas-liquid outlet is connected with a tail gas absorption device (10) through a pipeline provided with a vacuum pump (7) and an online detector (8); a gas phase outlet of the tail gas absorption device (10) is communicated with a tail gas purification device (9), the gas phase outlet of the tail gas purification device (9) is discharged into the atmosphere through a chimney (14), and an online detector (8) is arranged at the chimney (14); the waste liquid outlet of the tail gas absorption device (10) is communicated with the waste liquid collection device (11).

7. The method for remediating organically-polluted soil using the organically-polluted soil remediating apparatus as defined in claim 6, comprising the steps of:

the method comprises the following steps that organic contaminated soil to be repaired is crushed in a feeding unit (1), an inlet of a repairing unit (2) is opened, and the crushed soil is conveyed into the repairing unit (2) through the inlet; when feeding materials into the repairing unit (2), the second speed reducing motor (204) drives the hollow shaft (213) to drive the helical blade (214) to rotate, so that the entered soil is uniformly filled into the repairing chamber; when the soil filling height in the repairing cavity reaches a set value, closing inlets of the feeding unit (1) and the repairing unit (2), stopping feeding, and enabling the repairing cavity to be in a closed state; the heating layer (222), the fan (223), the air blowing device (16), the vacuum pump (7) and the medicine adding device (205) are started, the contaminated soil is uniformly heated by the heating layer (222), and hot air is promoted to flow in the repairing chamber by the fan (223); the blowing device (16) provides blowing gas through the air inlet pipe (218), and the vacuum pump (7) extracts tail gas through the air outlet (208), so that the blowing gas can flow through soil from bottom to top; adding the medicament into a dosing device (205), and then injecting the medicament into the soil through a dosing passage, wherein the medicament is uniformly mixed with the soil due to the rotation action of a helical blade (214); the tail gas extracted by the gas outlet (208) enters a heat exchanger (4) to reduce the temperature, and then enters a dust removal device (5) to separate solid particles in the tail gas; the separated solid substance enters a solid waste temporary storage device (6), and the gas enters a tail gas absorption device (10) to remove organic pollutants in the gas; the waste liquid generated by the tail gas absorption device (10) is periodically discharged into a waste liquid collection device (11), the gas treated by the tail gas absorption device (10) enters a tail gas purification device (9), and then is discharged into the atmosphere through a chimney (14); the hydraulic system regularly controls the opening of a box body bottom plate (203), and the soil which is repaired in the repairing unit (2) and reaches the standard is discharged out of the multifunctional repairing main body equipment (19) through the inclined plate (302) and the discharging hole (303) so as to be subjected to subsequent treatment.