CN112108508A

CN112108508A - Vehicle-mounted skid-mounted soil leaching system

Info

Publication number: CN112108508A
Application number: CN202011111831.8A
Authority: CN
Inventors: 丁莹
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-16
Filing date: 2020-10-16
Publication date: 2020-12-22

Abstract

The invention relates to the technical field of soil remediation, in particular to a vehicle-mounted skid-mounted soil leaching system which comprises a milling and tunneling device arranged at the front end of a chassis of a vehicle frame, wherein a crushing device communicated with the milling and tunneling device is arranged in a container body; the crushing device is arranged corresponding to the intermediate bin, the intermediate bin is communicated with the negative pressure induced air device, the other side of the negative pressure induced air device is communicated with the multi-stage rotary leaching device, and the multi-stage rotary leaching device separates mud and pumps the mud into the centrifugal drying device; screening tail slurry by a multi-stage rotary leaching device and feeding the tail slurry into a purification treatment device; the outlet of the purification treatment device is communicated with the slurry of the horizontal cake pressing device, and the horizontal cake pressing device is communicated with the feed inlet of the low-temperature carbonization furnace; the discharge port of the low-temperature carbonization furnace is communicated with a discharge pipe arranged at the tail part of the container body. The device is reasonable and novel in design and high in automation degree, realizes the collection and harmless treatment of the polluted soil and the in-situ backfilling of most of the polluted soil, and greatly improves the adaptability and the treatment efficiency of the device.

Description

Vehicle-mounted skid-mounted soil leaching system

Technical Field

The invention relates to the technical field of soil remediation, in particular to a vehicle-mounted skid-mounted soil washing system.

Background

With the continuous acceleration of urbanization and industrialization, the overall situation of soil pollution in China is severe. Causes soil pollution, such as industrial sludge, domestic garbage, sewage irrigation, pollutant sedimentation in the atmosphere, and a large amount of heavy metal-containing fertilizers and pesticides. According to preliminary statistics, nearly 1/5 cultivated lands in China are polluted in different degrees, the polluted soil can cause crop yield reduction, even pollutants in agricultural products exceed standards, particularly heavy metals exceed standards, so that the harmful effects on human bodies are caused, and the human health is not facilitated. In addition, site pollution caused by industrial and mining enterprises is also very serious, and particularly, the area of the polluted site is increased continuously due to the relocation of the polluted enterprises of chemical engineering, metallurgy and the like. "all-things soil grows", and the quality of soil determines the quality of all things, so in order to guarantee food safety and health of human beings, high attention must be paid to prevention of soil pollution and remediation of polluted soil.

At present, some soil remediation methods which are already implemented are available at home and abroad, such as a contaminated soil bioremediation technology, a contaminated soil physical remediation technology, a contaminated soil chemical remediation technology and a contaminated soil combined remediation technology. The bioremediation technology comprises phytoremediation, microbial remediation, biological combined remediation and the like, but the bioremediation technology is low in pertinence and low in efficiency, and pollutants such as heavy metal ions cannot be removed. Physical remediation techniques are techniques for removing or separating contaminants from soil by various physical processes, which are costly and cumbersome to handle. Compared with physical remediation, the chemical remediation technology of the polluted soil is developed earlier, and mainly comprises a leaching technology, a solvent leaching technology, an oxidation-reduction technology, electrodynamics remediation and the like. The chemical leaching technology is one of the common methods for repairing the polluted soil in the prior art, but based on the huge amount of the polluted soil in the prior art, the problems of low productivity, low treatment efficiency, large subsequent treatment capacity and the like of the device for repairing the polluted soil by chemical leaching cannot be effectively solved. In the existing soil remediation system, site selection and factory building are mostly carried out before the polluted soil enters the soil remediation system, so that the investment is huge, huge transportation cost is generated in the collection and transportation processes of the polluted soil, and the subsequent treatment capacity of the polluted soil is huge. Based on the problems, the vehicle-mounted skid-mounted soil leaching system is provided, so that the reduction treatment of the polluted soil and even the in-situ soil remediation are realized, and the important practical significance is achieved.

Disclosure of Invention

In order to solve the above problems, an embodiment of the present invention provides a vehicle-mounted skid-mounted soil washing system, and the purpose of the present invention is achieved by the following technical solutions:

a vehicle-mounted skid-mounted soil leaching system comprises a crawler tractor and a soil remediation vehicle dragged by the crawler tractor;

the soil remediation vehicle comprises a container body and a frame chassis for bearing the container body; the front end of the frame chassis is provided with a milling and tunneling device which is in driving connection with the crawler tractor, and the milling and tunneling device comprises a milling and tunneling bucket and a milling and planing roller which is rotatably arranged in the milling and tunneling bucket;

a crushing device is arranged in the container body and is communicated with the milling and tunneling device through a vacuum conveying pipeline; the lower end of the crushing device is correspondingly provided with an intermediate bin, the lower end of the intermediate bin is communicated with a negative pressure induced draft device through a vacuum conveying pipeline, the other side of the negative pressure induced draft device is communicated with at least one multi-stage rotary leaching device through a vacuum conveying pipeline, the multi-stage rotary leaching device is used for screening and separating mud, pumping the mud into a centrifugal spin-drying device through a mud pump and a pipeline, and performing liquid-solid separation; the tail slurry screened by the multi-stage rotary leaching device enters a purification treatment device for chemical purification treatment;

the top of the container body is provided with a pesticide applying device corresponding to the purification treatment device and a water storage tank corresponding to the multi-stage rotary leaching device;

the outlet of the purification treatment device is communicated with the slurry inlet of the horizontal cake pressing device through a slurry pump and a pipeline, and the slag discharging bin of the horizontal cake pressing device is communicated with the feed inlet of the low-temperature carbonization furnace; the discharge port of the low-temperature carbonization furnace is communicated with a discharge pipe arranged at the tail part of the container body.

Further, the low-temperature carbonization furnace comprises a first upper cover and a first lower box body which is matched with the first upper cover; a feeding screw is rotatably arranged in the first upper hood along the length direction, and a first power driving mechanism is arranged at one end of the first upper hood and corresponds to the feeding screw; an annular feeding chamber for feeding and spirally mounting is formed in the first upper cover, and a discharge hole is formed in the tail end of the annular feeding chamber; the feeding screw is of a hollow structure, one end of the tail of the feeding screw is rotatably sleeved with a first sealed air inlet sleeve, and hot air or inert gas is conveyed into the cavity of the upper machine cover through the first sealed air inlet sleeve and the feeding screw; a carbonization cavity is arranged in the first lower box body, and at least one layer of conveying unit for receiving materials is arranged in the carbonization cavity corresponding to the discharge hole; one side of the tail of the first lower box body corresponds to the transmission unit and is provided with an inclined blanking bin, and the blanking bin is communicated with a discharging pipe.

Furthermore, the transmission unit comprises a plurality of roll shafts which are transversely arranged in parallel in the first lower box body and transmission rollers which are rotatably arranged on the roll shafts, and transmission steel belts are tightened on the transmission rollers; the transmission unit further comprises a transmission driving device which is arranged on the first lower box body and drives the transmission roller to rotate.

Furthermore, at least one path of hot air pipe is arranged on the first upper hood or the first lower box body; a cold air pipe is arranged on the opposite side plate of the blanking bin; the container body is also provided with a cold energy collector, and the cold energy collector comprises an air inlet pipeline communicated with the first upper hood or the first lower box body inner cavity and an air supply pipeline communicated with the lower bin cold air pipe.

Further, the multi-stage rotary leaching device comprises a second upper cover and a second lower box body matched with the second upper cover; the transmission shafts are horizontally arranged in the inner cavities of the second upper hood and the second lower box body, and rotary screen assemblies are fixedly sleeved on the transmission shafts; one end of the transmission shaft is connected with the second power driving mechanism, and the other end of the transmission shaft is sleeved with a second sealing air inlet sleeve; the transmission shaft is of a hollow structure and is provided with a plurality of air holes; gas or liquid medium can be injected into the transmission shaft through the second sealing gas inlet sleeve; the rotary screen assembly comprises at least one screen ring, and the screen ring is fixedly connected to the transmission shaft through a screen support frame; a discharging hopper is arranged on one side of the second upper cover, and a discharging chute connected with the lower end of the discharging hopper extends into the rotary screen assembly from the outside of the second upper cover; a conical bin is arranged on the lower side of the second lower box body, and a discharge pipe fitting and a switch valve connected to the discharge pipe fitting are connected to the lower side of the conical bin; and a discharging mechanism is arranged on one side of the tail of the second lower box body corresponding to the lower edge of the screen ring.

Furthermore, the rotary screen assembly comprises a first screen ring, a second screen ring and a third screen ring which are coaxially arranged and distributed from inside to outside; the mesh hole diameters of the first screen ring, the second screen ring and the third screen ring are decreased progressively.

Furthermore, support ring plates are correspondingly arranged inside and outside the circumferences of two ends of the outer-layer screen ring of the rotary screen assembly; two groups of supporting rollers are arranged on the plate surfaces at the two ends of the second lower box body and correspond to the supporting ring plates; each group of supporting rollers comprises two supporting rollers, and each supporting roller comprises a roller shaft and a roller sleeved on the roller shaft.

Further, arrange material mechanism and include that the arc that corresponds the setting with the screen cloth circle connects flitch and the row's of arc material receiving plate end connection expects the chute.

Further, still be provided with air separator on the container body, air separator passes through conveying hose and sealed air inlet cover intercommunication.

Furthermore, the soil washing system also comprises a central control device which is used for controlling the soil washing system to operate and is arranged in a cab of the crawler-type tractor.

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

1. the device has the advantages of reasonable and novel design, compact structure and high automation degree, and each function of the soil leaching system is modularly integrated on the mobile vehicle, so that the collection and harmless treatment of the polluted soil and the in-situ backfilling of most of the polluted soil are realized, the adaptability and treatment efficiency of the device are greatly improved, and the harmless treatment cost of the polluted soil is greatly reduced;

2. the multi-stage rotary leaching device can conveniently collect the polluted soil, efficiently leaches and screens the polluted soil through the multi-stage rotary leaching device, realizes the reduction treatment of the polluted soil, enriches the pollutants, is provided with the purification treatment device in a matching way, integrally treats the soil pollutants, and greatly reduces the subsequent harmless treatment pressure;

3. the low-temperature carbonization furnace adopts a feeding screw and a sealing air inlet sleeve which is arranged in a matched manner, and gas with a catalytic function or heating hot air or inert gas can be selectively added, so that the polluted soil is stirred intensively, the impurity removal effect of the polluted soil is improved, and the generation of dioxin can be avoided; for the polluted soil with high organic matter content, hot air and gas with catalytic action can be input; the multistage conveying unit is adopted, so that the detention time of the polluted soil in the carbonization catalysis kiln can be prolonged, and the drying and impurity removal effects are improved; the device is provided with the cold energy collector in a matching way, so that the heat energy utilization rate is improved, and meanwhile, the dust removal of tail gas and the cooling treatment of high-temperature tailings can be realized;

4. the device comprises the transmission shaft, the feeding screw and the sealing air inlet sleeve which is arranged in a matched manner, so that the polluted soil can be efficiently catalyzed and leached, and the leaching or catalysis effect is greatly improved;

5. the soil leaching system has strong adaptability, is suitable for catalysis, leaching and purification treatment of different types of polluted soil, has high capacity and high treatment efficiency, and meets the requirement of industrial production process.

Drawings

FIG. 1 is a schematic diagram of a soil washing system according to the present invention;

FIG. 2 is a schematic view of the internal structure of a container body of the soil washing system of the present invention;

FIG. 3 is a front view of a low-temperature carbonization furnace according to an embodiment of the present invention;

FIG. 4 is a schematic view of the internal structure of the low temperature carbonization furnace according to the embodiment of the present invention;

FIG. 5 is a left side view of a low temperature carbonization furnace according to an embodiment of the present invention;

fig. 6 is a schematic structural view of the milling box of the present invention;

FIG. 7 is a front view of the multi-stage rotary leaching apparatus of the present invention;

FIG. 8 is a front view of the internal structure of the multi-stage rotary leaching apparatus of FIG. 7;

FIG. 9 is a left side view of the multi-stage rotary rinsing apparatus of the present invention;

FIG. 10 is a right side view of the multi-stage rotary elution unit of the present invention;

fig. 11 is a right side view of the internal structure of the multi-stage rotary washing and filtering apparatus of fig. 10.

In the figure:

100. a soil washing system; 110. a track-type tractor; 111. a hydraulic drive arm; 112. a transmission rod; 113. a hinge lever; 120. a central control device; 130. milling and digging a device; 131. a connecting crank; 132. a power box; 133. milling and planing the box; 1331. milling and planing a bucket; 1332. a shovel head; 1333. a striker plate; 1334. a shovel port; 1335. milling a planing roller; 1336. connecting a lifting lug; 140. a vacuum delivery pipe; 150. a feed hopper; 160. repairing the vehicle; 161. a container body; 162. a frame chassis; 170. an air separation unit; 180. a discharge pipe; 190. a discharge valve; 1100. a crushing device; 1110. a low-temperature carbonization furnace; 1111. a first upper hood; 1112. a hot air pipe; 1113. a first sealed air inlet sleeve; 1114. a first lower box body; 1115. a roll shaft; 1116. discharging a bin; 1118. a vibrator; 1119. a transmission drive device; 11110. a first power drive mechanism; 11111. a feed port; 11112. an annular feed chamber; 11113. a feed screw; 11114. conveying a steel belt; 11115. a driving roller; 1120. a cold energy collector; 1130. a purification treatment device; 1131. purifying the tank body; 1132. a stirring assembly; 1133. a purifying and stirring motor; 1140. a negative pressure induced draft device; 1150. an intermediate storage bin; 1160. a water storage tank; 1170. a slurry pump;

200. a multi-stage rotary leaching device; 210. a second upper hood; 211. fixing the flanging; 220. fixing the bolt; 230. feeding a hopper; 231. blanking chute; 240. a power drive mechanism; 241. a drive pulley; 242. a transfer belt; 243. a power driven motor; 250. an L-shaped bracket; 260. a second lower box body; 270. a discharge tube; 280. an on-off valve; 290. a conical stock bin; 2100. a discharge mechanism; 2101. an arc-shaped material receiving plate; 2102. a discharge chute; 2110. a drive shaft; 2120. a rotary screen assembly; 2121. a first screen ring; 2122. a second screen ring; 2123. a third screen ring; 2130. a support ring plate; 2140. a U-shaped clamping groove; 2150. a support roller; 2160. a second sealed air inlet sleeve; 2170. a screen mesh support frame;

300. a horizontal cake pressing device; 400. a centrifugal drying device; 500. a drug delivery device; 510. a pesticide application tank body; 520. applying a drug helix; 530. a medicine applying motor.

Detailed Description

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

Example 1:

referring to fig. 1 to 11, the invention discloses a vehicle-mounted skid-mounted soil washing system, wherein the soil washing system 100 comprises a crawler tractor 110 and a soil remediation vehicle 160 towed by the crawler tractor; the crawler tractor is widely applicable, and is particularly suitable for hilly and mountain work.

The soil remediation vehicle 160 includes a container body 161 and a frame chassis 162 carrying the container body; the front end of the frame chassis 162 is provided with a milling and tunneling device 130 in driving connection with the crawler tractor, the milling and tunneling device 130 comprises a milling and tunneling box 133, the milling and tunneling box 133 comprises a milling and tunneling bucket 1331 and a milling and tunneling roller 1335 rotatably arranged in the milling and tunneling bucket, the front end of the milling and tunneling bucket forms a shovel port 1334, and the milling and tunneling bucket on the lower edge of the shovel port is provided with a plurality of shovel heads 1332, so that the skid-mounted effect on contaminated soil is increased; a material baffle 1333 which inclines upwards can be arranged in the milling bucket 1331, so that soil entering the milling bucket 1331 can move upwards to the inlet of the vacuum conveying pipeline; the contaminated soil can be collected into the milling bucket by adjusting the milling and tunneling device, the contaminated soil can continuously enter the milling bucket along with the forward movement of the soil remediation vehicle, the milling and tunneling roller can preliminarily crush the massive soil, and the diameter of soil particles processed by the milling and tunneling device can be controlled to be 5-10mm, so that the vacuum transmission pipeline can be conveniently extracted.

Referring to fig. 2, a crushing device 1100 is arranged in the container body 161, the crushing device 1100 is communicated with the milling and tunneling device 130 through a vacuum conveying pipeline 140, a feed hopper 150 is arranged on the container body corresponding to the crushing device, and the vacuum conveying pipeline is connected to the feed hopper 150; the contaminated soil processed by the milling and tunneling device enters a crushing device through a vacuum transmission pipeline and is further crushed to 0.057-2mm, the crushing device adopts a three-shaft conical tooth-aligning crushing device and mainly comprises three crushing rollers which are correspondingly arranged and a driving motor which is arranged in a matching way, and the large-particle soil is further crushed through the high-speed rotation of the three-shaft conical tooth-aligning crushing device, so that the subsequent processing effect of the contaminated soil is ensured; the lower end of the crushing device 1100 is correspondingly provided with an intermediate bin 1150, the lower end of the intermediate bin 1150 is communicated with a negative pressure induced draft device 1140 through a vacuum conveying pipeline, and the other side of the negative pressure induced draft device 1140 is communicated with at least one multi-stage rotary leaching device 200 through a vacuum conveying pipeline; in this embodiment, the multistage rotary leaching device comprises 3 leaching devices arranged in parallel in the container body, so as to improve the leaching efficiency of the contaminated soil; the multistage rotary leaching device 200 is used for screening and separating mud, and pumping the mud into a centrifugal drying device 400 through a mud pump 1170 and a pipeline, wherein a plurality of centrifugal drying devices are arranged, and the centrifugal drying devices respectively correspond to liquid-solid separation operations for receiving mud with different particles; the centrifugal drying device adopts a conventionally arranged shifting wheel structure, solid filter cakes for separating mud are discharged out of the container body from the lower side of the centrifugal drying device, in-situ backfilling of polluted soil is realized, and filtrate returns to the system for recycling; the tail slurry screened by the multistage rotary leaching device 200 enters a correspondingly arranged purification treatment device 1130 for chemical purification treatment; in this embodiment, each of the multi-stage rotary leaching devices may be disposed in one-to-one correspondence with the purification treatment devices, that is, the number of the purification treatment devices is the same as that of the multi-stage rotary leaching devices; on the other hand, the screened tail slurry of each multi-stage rotary leaching device can respectively enter a plurality of different purification treatment devices for chemical treatment so as to cope with possible equipment faults; in the purification treatment device, the screened tail slurry enters the purification treatment device to perform chemical reaction with chemical agents so as to remove pollutants such as heavy metal ions, wherein the chemical agents are selected according to the components of the pollutants, and flocculating agents can be added into the purification treatment device in order to improve the sedimentation speed of the slurry.

In a specific embodiment, as shown in fig. 2, the purification treatment apparatus 1130 includes a purification tank 1131, a stirring assembly 1132 and a purification stirring motor 1133 disposed in cooperation with the stirring assembly are disposed in the center of the purification tank 1131, and the screening tailings and the chemical agent are sufficiently reacted by stirring of the stirring assembly and the purification stirring motor, so as to improve the removal rate of the pollutants.

Referring to fig. 1 and 2, a pesticide application device 500 corresponding to the purification treatment device and a water storage tank 1160 corresponding to the multi-stage rotary leaching device 200 are arranged at the top of the container body 161; the pesticide applying device 500 comprises a pesticide applying tank 510, a pesticide applying screw 520 and a pesticide applying motor 530 matched with the pesticide applying screw are arranged in the center of the pesticide applying tank 510, and chemical agents can be quantitatively added into the purification treatment device by controlling the running speed of the pesticide applying device; municipal industrial water is contained in the water storage tank, and water flow in the water storage tank carries polluted soil to enter the multi-stage rotary leaching device 200 for subsequent rotary screening process.

Referring to fig. 2, an outlet of the purification treatment device 1130 is communicated with a slurry inlet of the horizontal cake pressing device 300 through a slurry pump 1170 and a pipeline, a residue discharge bin of the horizontal cake pressing device 300 is communicated with a feed inlet of the low-temperature carbonization furnace 1110, filtrate subjected to pressure filtration by the horizontal cake pressing device 300 needs to be collected for subsequent treatment, and filter residues enter the low-temperature carbonization furnace 1110 for subsequent treatment; the discharge hole of the low-temperature carbonization furnace 1110 is communicated with a discharge pipe 180 arranged at the tail part of the container body, a discharge valve 190 is also arranged on the discharge pipe 180, and the soil treated by the low-temperature carbonization furnace can be directly discharged out of a repairing vehicle through the discharge pipe 180 for in-situ backfilling; if the soil treated by the low-temperature carbonization furnace still cannot meet the discharge standard, further packaging and bagging are needed for centralized treatment; the polluted soil treated by the soil leaching system can be repaired in situ, the treatment cost of the polluted soil is greatly reduced, the quantity of the polluted soil is greatly reduced even if part of the soil still needs to be further treated, the reduction of pollutant treatment is realized, and the post-treatment pressure is greatly reduced.

In an alternative embodiment, referring to fig. 3-5, the low temperature carbonization furnace 1110 includes a first upper housing 1111 and a first lower tank 1114 disposed in cooperation with the first upper housing; a feeding screw 11113 is rotatably arranged in the first upper cover 1111 along the length direction, a first power driving mechanism 11110 is arranged at one end of the first upper cover 1111 and corresponds to the feeding screw 11113, a feeding port 11111 connected with a vacuum conveying pipeline is arranged on the first upper cover 1111, the feeding screw is driven to rotate along the axial direction by the first power driving mechanism, and the first power driving mechanism comprises a transmission belt pulley connected with one end of a feeding screw head and a driving motor in driving connection with the transmission belt pulley through a transmission belt; the feeding screw can be driven to rotate by the power driving mechanism, so that the polluted soil is conveyed; an annular feeding chamber 11112 for feeding and spirally mounting is formed in the first upper cover 1111, and a discharge hole is formed in the tail end of the annular feeding chamber; the feeding screw 11113 is of a hollow structure, one end of the tail of the feeding screw 11113 is rotatably sleeved with a first sealed air inlet sleeve 1113, hot air or inert gas is conveyed into an upper hood cavity through the first sealed air inlet sleeve 1113 and the feeding screw 11113, the annular feeding cavity mainly acts on delaying the time of the polluted soil entering the drying cavity of the lower box body, and in the annular feeding cavity, the polluted soil and the feeding screw gradually release the hot air or inert gas with catalytic gas to fully act, so that pollutants can be removed conveniently. A carbonization cavity is arranged in the first lower box body 1114, and at least one layer of conveying unit for receiving materials is arranged in the carbonization cavity corresponding to the discharge hole; an inclined blanking bin 1116 is arranged on one side of the tail of the first lower box body 1114 and corresponds to the transmission unit, the blanking bin 1116 is communicated with a discharge pipe 180, and a discharge valve 190 is further arranged on the discharge pipe 180; the contaminated soil falls from the transmission unit and then enters the lower feed bin 1116 to be cooled, and the vibrator 1118 is arranged on the side wall of the lower feed bin, so that the cooled contaminated soil is discharged from the discharge pipe. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.

In a specific embodiment, a carbonization cavity is arranged in the first lower box 1114, the transmission unit comprises two transmission units layered up and down, a first transmission unit is arranged at the upper part of the carbonization cavity corresponding to the discharge port, a second transmission unit is correspondingly arranged below the first transmission unit, the first transmission unit and the second transmission unit move in the same direction, and one end of a nose of the first transmission unit is shorter than one end of a nose of the second transmission unit; the first transmission unit is used for conveying the polluted soil to be treated to the machine head from the machine tail, and in the process, the polluted soil gradually releases water and organic pollutant components in the polluted soil under the action of latent heat; the polluted soil falls from the front end of the first transmission unit to the front end of the second transmission unit, and the second transmission unit further promotes the carbonization process of the polluted soil in the process of transporting the polluted soil to the tail of the machine, so that the release of soil pollutants is further promoted; it should be noted that, according to the demand, a third transmission unit can be further provided, and evaporation carbonization treatment of the contaminated soil can be well realized through the multi-stage transmission unit, so that the reduction treatment process of the contaminated soil is further realized. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.

In one embodiment, the conveying unit comprises a plurality of roll shafts 1115 transversely arranged in parallel in the first lower box 1114 and a driving roller 11115 rotatably arranged on the roll shafts, and a conveying steel belt 11114 is tightened on the driving roller 11115; the transmission unit further comprises a transmission driving device 1119 which is arranged on the first lower box body and drives the transmission roller to rotate, two ends of the transmission roller are arranged on the lower box body in a rotating mode through a roller shaft, the transmission driving device 1119 comprises a driving motor and a gear transmission assembly or a chain wheel and chain transmission assembly which is matched with the driving motor, and the transmission driving device can drive the transmission steel belt to rotate so as to carry the soil on the transmission driving device to run; the transmission unit with the structure has good running stability, and is particularly suitable for being applied to a drying device with higher temperature. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.

In one embodiment, at least one hot air duct 1112 is further disposed on the first upper housing 1111 or the first lower case 1114; the hot air pipe 1112 comprises a main air pipe and a plurality of branch air pipes communicated with the main air pipe; referring to fig. 5, the first upper cover is correspondingly provided with two hot air pipes 1112, and the hot air pipes are matched with the feeding screw to efficiently heat, catalyze and carbonize the polluted soil to remove pollutants. A cold air pipe is arranged on the side plate of the lower bin 1116; the container body 161 is further provided with a cold energy collector 1120, and the cold energy collector 1120 comprises an air inlet pipeline communicated with the inner cavity of the first upper hood or the first lower container body and an air supply pipeline communicated with a cold air pipe of the blanking bin 1116; in this embodiment, the cold energy collector 1120 can be obtained by integrating the prior art, and includes a dust collecting device such as a bag dust collector, and a heat recovery device such as a heat recovery coil pipe, and can remove dust from the high-temperature tail gas in the carbonization catalytic kiln and recover the heat energy thereof for recycling, and prepare cold air to be conveyed to the feed bin to cool the material. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.

In one embodiment, referring to fig. 7 to 11, the multi-stage rotary washing apparatus 200 includes a second upper housing 210 and a second lower tank 260 disposed in cooperation with the second upper housing; in this embodiment, the lower edge of the second upper hood 210 and the upper edge of the second lower box 260 are correspondingly provided with fixing flanges 211 along the length direction, and the second upper hood 210 and the second lower box 260 are fixedly connected by fixing bolts 220 and the fixing flanges 211. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.

Specifically, a transmission shaft 2110 is horizontally arranged in the inner cavities of the second upper hood 210 and the second lower box 260, and a rotary screen assembly 2120 is fixedly sleeved on the transmission shaft 2110; one end of the transmission shaft 2110 is connected with the second power driving mechanism 240, and the other end of the transmission shaft 2110 is sleeved with the second sealing air inlet sleeve 2160, so that the transmission shaft 2110 can be driven to rotate by the second power driving mechanism 240, and the rotary screen assembly 2120 is driven to rotate, thereby realizing filtering and screening of polluted soil. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.

The second power driving mechanism 240 comprises a transmission pulley 241 connected with one end of a transmission shaft 2110 head, and a power driving motor 243 in driving connection with the transmission pulley through a transmission belt 242, wherein the power driving motor 243 is fixed on the side wall of the second lower box 260 through an L-shaped bracket 250; the driving of the transmission shaft 2110 and further the rotation of the rotary screen assembly 2120 can be realized by the second power driving mechanism 240, and it should be noted that the first power driving mechanism and the second power driving mechanism have the same structural form, and the driving form of the power driving mechanism is not limited, for example, the driving form of the chain wheel and the chain can be adopted. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.

The transmission shaft 2110 is of a hollow structure, a plurality of air holes are formed in the transmission shaft 2110, and a gas or liquid medium can be injected into the transmission shaft 2110 through the second sealing air inlet sleeve 2160; in this embodiment, the water solution dissolved with the catalytic action can be injected into the transmission shaft 2110 through the second sealed air inlet sleeve 2160 and sprayed out through the plurality of air holes on the shaft lever of the transmission shaft 2110 to realize the leaching of the contaminated soil, and the contaminated soil is subjected to multi-stage screening and leaching by matching with the rotary screen assembly 2120, so that the purpose of purifying the soil is achieved. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.

Wherein the rotary screen assembly 2120 comprises at least one screen ring fixedly attached to the drive shaft 2110 by a screen support 2170; in this embodiment, the rotating screen assembly 2120 includes a first screen ring 2121, a second screen ring 2122 and a third screen ring 2123 which are coaxially arranged and distributed from inside to outside; the mesh apertures of the first screen ring 2121, the second screen ring 2122 and the third screen ring 2123 are reduced progressively, and the contaminated soil to be treated enters from the first screen ring 2121, gradually passes through the first screen ring 2121, the second screen ring 2122 and the third screen ring 2123 and is washed along with washing, so that the contaminated soil is separated and washed in multiple stages, and the contaminated soil particles are enriched efficiently. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.

A blanking hopper 230 is arranged on one side of the second upper hood 210, and a blanking chute 231 connected with the lower end of the blanking hopper 230 extends into the rotary screen assembly 2120 from the outside of the second upper hood; in this embodiment, the end of the blanking chute 231 extends between the first screen ring 2121 of the rotary screen assembly 2120 and the transmission shaft 2110, and it is preferable that the blanking chute 231 does not interfere with the material entering the first screen ring 2121. A conical bin 290 is arranged on the lower side of the second lower box 260, the conical bin 290 is correspondingly arranged below the third screen ring, a discharge pipe 270 and a switch valve 280 connected to the discharge pipe 270 are connected to the lower side of the conical bin 290, and fine particle slurry passing through the third screen ring can be discharged into a purification treatment device 1130 for subsequent purification treatment; and a discharging mechanism 2100 is arranged on one side of the tail of the second lower box 260 corresponding to the lower edge of the screen ring. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.

In an optional embodiment, support ring plates 2130 are correspondingly arranged inside and outside the circumferences of two ends of the outer screen ring of the rotary screen assembly 2120, and specifically, the support ring plates 2130 are fixedly arranged inside and outside the screens at two ends of the third screen ring 2123; two groups of supporting rollers 2150 are arranged on the plate surfaces at the two ends of the second lower box body 260 and correspond to the supporting ring plate 2130; each group of support rollers comprises two support rollers 2150, and the support rollers 2150 comprise roller shafts and rollers sleeved on the roller shafts. The surface of the second lower box 260 is provided with a U-shaped clamping groove 2140 for fixing and installing a roll shaft, the rotary screen assembly 2120 is rotatably connected with the supporting rollers 2150 through the supporting ring plate 2130, and the two groups of supporting rollers 2150 can form effective support for the outer circumference of the rotary screen assembly 2120, so that the load of the transmission shaft 2110 can be reduced, and the stability of the rotary screen assembly 2120 in the working process can be improved. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.

In a specific embodiment, the discharging mechanism 2100 includes an arc-shaped material receiving plate 2101 corresponding to the screen ring and a discharging chute 2102 connected to the end of the arc-shaped material receiving plate; specifically, the discharging mechanism 2100 includes a single discharging mechanism disposed corresponding to the first screen ring, the second screen ring and the third screen ring, and is respectively configured to receive the screen residues passing through the first screen ring, the second screen ring and the third screen ring, and pump the screened slurry into the centrifugal spin-drying device 400 through a slurry pump and a pipeline to achieve liquid-solid separation. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.

In a specific embodiment, the container body 161 is further provided with an air separation device 170, and the air separation device 170 is communicated with the sealed air inlet sleeve through a conveying hose; the air separation device can adopt the prior art, the main function of the air separation device is to separate nitrogen from air, the air separation device 170 is communicated with the sealed air inlet sleeve through a conveying hose, and the nitrogen is conveyed into the low-temperature carbonization furnace or the multistage rotary leaching device; in addition, gases with catalytic action can also be conveyed into the low-temperature carbonization furnace or the multi-stage rotary leaching device by the air separation device; in addition, the air inlet sealing sleeve can also be used for injecting water into a system, such as a multi-stage rotary leaching device, namely the injection of a medium into the reactor through the sealing air inlet sleeve is not limited and can be selected according to requirements. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.

Referring to fig. 1, the tail end of the crawler tractor 110 is provided with a hydraulic driving arm 111, a driving rod 112 and a hinge rod 113; the hydraulic drive arm 111 is hinged with a connecting lifting lug 1336 arranged at the top of the milling bucket through a connecting crank 131; through the matching of the hydraulic driving arm and the connecting crank, the lifting of the milling and tunneling device can be realized, the milling bucket is convenient to put down during working, and the polluted soil is collected through the milling and planing roller; the transmission rod 112 is in transmission connection with a power box 132 arranged on the milling bucket, and a power output end extends out of the power box 132 to two sides; the end part of a roll shaft of the milling and planing roller is fixedly provided with a transmission chain wheel or a belt pulley, a power transmission end is fixedly provided with a transmission chain wheel or a belt pulley, a power output end of a power box can drive the milling and planing roller to rotate through the transmission chain wheel or the belt pulley and a transmission belt or a transmission chain, and the power of the power box is sourced from a power box of a crawler-type tractor; the hinge rod 113 is hinged with the front end of the frame chassis 162, so that the crawler-type tractor is rotatably connected with the repairing vehicle. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.

In one embodiment, the soil washing system 100 further includes a central control 120 located in the cab of the track-type tractor 110 for controlling the operation of the soil washing system, and the operation of the track-type tractor and the operation of the rehabilitation vehicle are controlled by the hollow control. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In addition, the embodiments in the present specification are all described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the device and system embodiments, since they are basically similar to the method embodiments, the description is simple, and for the relevant points, referring to the partial description of the method embodiments, it is sufficient that the components indicated as units may or may not be physical units, that is, may be located in one place, or may not be divided into a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. Can be understood and implemented by those skilled in the art without inventive effort.

The above description is only one specific implementation method of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A vehicle-mounted skid-mounted soil washing system, characterized in that the soil washing system (100) comprises a track-type tractor (110) and a soil remediation vehicle (160) towed by the track-type tractor;

the soil remediation vehicle (160) comprises a container body (161) and a frame chassis (162) for carrying the container body; the front end of the frame chassis (162) is provided with a milling and tunneling device (130) in driving connection with the crawler tractor, and the milling and tunneling device (130) comprises a milling bucket (1331) and a milling and planing roller (1335) rotatably arranged in the milling bucket;

a crushing device (1100) is arranged in the container body (161), and the crushing device (1100) is communicated with the milling and tunneling device (130) through a vacuum conveying pipeline (140); the lower end of the crushing device (1100) is correspondingly provided with an intermediate bin (1150), the lower end of the intermediate bin (1150) is communicated with a negative pressure induced air device (1140) through a vacuum conveying pipeline, the other side of the negative pressure induced air device (1140) is communicated with at least one multi-stage rotary leaching device (200) through a vacuum conveying pipeline, and the multi-stage rotary leaching device (200) screens and separates mud, pumps the mud into a centrifugal drying device (400) through a mud pump (1170) and a pipeline, and performs liquid-solid separation; screening tail slurry by the multistage rotary leaching device (200) and entering a correspondingly arranged purification treatment device (1130) for chemical purification treatment;

the top of the container body (161) is provided with a pesticide applying device (500) corresponding to the purification treatment device and a water storage tank (1160) corresponding to the multi-stage rotary leaching device (200);

the outlet of the purification treatment device (1130) is communicated with the slurry inlet of the horizontal cake pressing device (300) through a slurry pump (1170) and a pipeline, and the slag discharging bin of the horizontal cake pressing device (300) is communicated with the feed inlet of the low-temperature carbonization furnace (1110); and a discharge hole of the low-temperature carbonization furnace (1110) is communicated with a discharge pipe (180) arranged at the tail part of the container body.

2. A vehicle skid-mounted soil washing system according to claim 1, wherein said low temperature carbonization furnace (1110) comprises a first upper hood (1111) and a first lower tank (1114) cooperating with the first upper hood; a feeding screw (11113) is rotatably arranged in the first upper hood (1111) along the length direction, and a first power driving mechanism (11110) is arranged at one end of the first upper hood (1111) corresponding to the feeding screw (11113); an annular feeding chamber (11112) in which feeding materials are spirally arranged is formed in the first upper hood (1111), and a discharging hole is formed in the tail end of the annular feeding chamber; the feeding screw (11113) is of a hollow structure, one end of the tail of the feeding screw (11113) is rotatably sleeved with a first sealed air inlet sleeve (1113), and hot air or inert gas is conveyed into the cavity of the upper machine cover through the first sealed air inlet sleeve (1113) and the feeding screw (11113); a carbonization cavity is arranged in the first lower box body (1114), and at least one layer of conveying unit for receiving materials is arranged in the carbonization cavity corresponding to the discharge hole; one side of the tail of the first lower box body (1114) corresponds to the transmission unit to be provided with an inclined blanking bin (1116), and the blanking bin (1116) is communicated with the discharge pipe (180).

3. The vehicle-mounted skid-mounted soil washing system according to claim 2, wherein the conveying unit comprises a plurality of roll shafts (1115) transversely arranged in parallel in the first lower box body (1114) and a driving roller (11115) rotatably arranged on the roll shafts, and a conveying steel belt (11114) is stretched on the driving roller (11115); the transmission unit also comprises a transmission driving device (1119) which is arranged on the first lower box body and drives the transmission roller to rotate.

4. A vehicle carried skid mounted soil washing system according to claim 3, wherein at least one hot blast pipe (1112) is further provided on said first upper hood (1111) or said first lower tank (1114); a cold air pipe is arranged on the opposite side plate of the lower bin (1116); the container body (161) is further provided with a cold energy collector (1120), and the cold energy collector (1120) comprises an air inlet pipeline communicated with the first upper hood or the first lower box body inner cavity and an air supply pipeline communicated with a lower bin (1116) cold air pipe.

5. A vehicle skid-mounted soil washing system according to claim 1, wherein said multi-stage rotary washing apparatus (200) comprises a second upper housing (210) and a second lower tank (260) cooperating with the second upper housing; a transmission shaft (2110) is horizontally arranged in the inner cavities of the second upper hood (210) and the second lower box body (260), and a rotary screen assembly (2120) is fixedly sleeved on the transmission shaft (2110); one end of the transmission shaft (2110) is connected with the second power driving mechanism (240), and the other end of the transmission shaft (2110) is sleeved with a second sealed air inlet sleeve (2160); the transmission shaft (2110) is of a hollow structure, and a plurality of air holes are formed in the transmission shaft; gas or liquid medium can be injected into the transmission shaft (2110) through the second sealing gas inlet sleeve (2160); the rotary screen assembly (2120) comprises at least one screen ring fixedly connected to a drive shaft (2110) by a screen support frame (2170); a blanking hopper (230) is arranged on one side of the second upper hood (210), and a blanking chute (231) connected with the lower end of the blanking hopper (230) extends into the rotary screen assembly (2120) from the outside of the second upper hood; a conical bin (290) is arranged on the lower side of the second lower box body (260), and a discharge pipe fitting (270) and a switch valve (280) connected into the discharge pipe fitting (270) are connected to the lower side of the conical bin (290); and a discharging mechanism (2100) is arranged on one side of the tail of the second lower box body (260) corresponding to the lower edge of the screen ring.

6. A vehicle mounted skid mounted soil washing system as defined in claim 5 wherein said rotary screen assembly (2120) comprises a first (2121), a second (2122) and a third (2123) screen ring coaxially arranged, distributed from the inside to the outside; the mesh aperture of the first screen ring (1121), the second screen ring (1122) and the third screen ring (1123) is reduced progressively.

7. The vehicle-mounted skid-mounted soil washing system according to claim 6, wherein support ring plates (2130) are correspondingly arranged inside and outside the circumferences of two ends of an outer screen ring of the rotary screen assembly (2120); two groups of supporting rollers (2150) are arranged on the plate surfaces at the two ends of the second lower box body (260) and correspond to the supporting ring plate (2130); each group of supporting rollers comprises two supporting rollers (2150), and each supporting roller (2150) comprises a roller shaft (2151) and a roller (2152) sleeved on the roller shaft.

8. A vehicle mounted skid mounted soil washing system as claimed in claim 7, wherein said discharge mechanism (2100) comprises an arcuate receiver plate (2101) positioned in correspondence with the screen ring and a discharge chute (2102) connected to the end of the arcuate receiver plate.

9. A vehicle skid-mounted soil washing system as claimed in claim 8, wherein said container body (161) is further provided with an air separation unit (170), said air separation unit (170) being in communication with said sealed air inlet sleeve via a transfer hose.

10. A vehicle skid-mounted soil washing system according to any of claims 1 to 9, wherein said soil washing system (100) further comprises a central control unit (120) placed in the cab of the track-type tractor (110) for controlling the operation of the soil washing system.