CN207463799U - A kind of soil heterotopic elution screening interlock control system - Google Patents

Abstract

A kind of soil heterotopic elution screening interlock control system, including elution device, screening plant and frequency conversion spray pipeline；Elution device includes elution roller, material pick-up device and speed-adjustable driving device, and elution roller is connect with speed-adjustable driving device, and material pick-up device is arranged in elution roller；Screening plant is connected to the port of export of elution roller；Frequency conversion spray pipeline is set in elution device.The utility model realizes accurate elution, saves energy consumption, effectively avoids sieve pore blockade, improve elution efficiency；Realize different-grain diameter, different content of beary metal bed mud component elution separation, achieve the purpose that bed mud classification processing.

Description

A kind of soil heterotopic elution screening interlock control system

Technical field

It is used to be administered by contaminated soils such as heavy metal, nutrient, hardly degraded organic substances the utility model is related to one kind With the elution circuit of reparation, belong to Soil leaching technical field.

Background technology

Soil is one layer of loose substance of earth surface, the minerals formed by rock weathering, animals and plants, and microorganism is residual Organic matter, geobiont (solid matter) and moisture (liquid phase substance), the air (gaseous substance) of body decomposition generation, oxidation The compositions such as humus, can growing plant.Soil particle mutually bonds to form soil texture by different accumulation modes.Desanding Native outer, soil particle is collected under field conditions (factors) to be showed in the form of soil texture together, and the soil texture is to soil The influence of the earth production traits is also to be come out by soil texture sex expression.The type of soil texture has sheet, block-like, column And little particle it is granular.

With the continuous quickening of process of industrialization, the unreasonable exploitation and its smelting of mineral resources are discharged, for a long time to soil The reasons such as application of atmospheric sedimentation, chemical fertilizer and pesticide, cause soil caused by carrying out sewage irrigation and sludge application, human activity Earth is heavily contaminated.

China's soil restoring technology research is started late, and regional development is unbalanced in addition, and soil types is various, contaminated site Factors, the enforcement difficulties such as feature is changeable, and pollution type is complicated, and technical need is various are larger.Soil remediation relatively conventional at present Technology, which is summed up, common mainly has chemical leaching method, thermodynamics repairing method, thermal desorption repairing method, burning method, landfill Method, composting method, phytoremediation, permeable reactive wall method and biological restoration etc. are several.

Wherein, chemical leaching method is to be combined using leacheate or chemical assistant with the pollutant in soil, and pass through elution The chemical actions such as desorption, chelating, dissolving or the fixation of liquid, achieve the purpose that repairing polluted soil.It is current soil remediation industry One of common major technique.It is different according to elution site location, elution in situ and dystopy elution can be divided into, wherein dystopy elutes Field repair and reparation of leaving the theatre can be divided into again.

Wherein, original position soil elution recovery technique is the depth according to pollutant distribution, allows leacheate in gravity or external force Contaminated soil is flowed through under effect, pollutant is made to be migrated out from soil, and is collected using extraction well or using the method for ditching Eluent.Pollutant is after rationally disposition in eluent, and leacheate can carry out reuse or qualified discharge, and treated, and soil can With safe utilization again.Original position soil elution recovery technique is suitable for more gaps of the hydraulic conductivity more than 10cm/s, easily infiltration Soil, such as sandy soil gravel soil, alluvial soil and strand soil.ADSORPTION STATE pollutant is removed, including heavy metal, volatile halogenated Organic matter and non-halogenated organic matter.

Dystopy Soil leaching recovery technique then includes below scheme：

(1) soil is excavated.

(2) soil particle sieves, impurities removing such as rubbish, Organic residues, glass fragment etc., and by the excessive gravel of grain size It removes.

(3) elution is handled, and contaminated soil and leacheate is mixed under certain native liquor ratio, treats leacheate by soil It after pollutant extraction, stands, carries out separation of solid and liquid.

(4) ring waste is handled, and the ring waste containing suspended particulate after processing, can be re-used for eluting

(5) it is discharged after escaping gas processing is up to standard.

(6) soil after eluting meets control standard, is backfilled or safe utilization, the dirt generated in ring waste processing Mud can be eluted or be sent again after dehydration to final disposal field and be handled.

Dystopy Soil leaching recovery technique is suitable for clay content less than 25%, by heavy metal, radionuclide, petroleum hydrocarbon The contaminated soils such as class, volatile organic matter, Polychlorinated biphenyls and polycyclic aromatic hydrocarbon.

Original position soil elution recovery technique will allow leacheate to flow through contaminated soil, and utilize pumping under gravity or external force effect It carries well or eluent is collected using the method for ditching.Lessivation and eluent removal process are difficult to accurately control, and generate secondary The possibility of pollution is larger, therefore dystopy Soil leaching recovery technique is generally used when satisfying the requirements.

Soil heterotopic elution recovery technique disclosed in Chinese patent literature CN106238451A is such as《It is a kind of useless containing heavy metal The elution technique and device of slag or soil》Disclose the elution technique and device of a kind of waste residue containing heavy metal or soil.The leaching Technique is washed to include：Broken, screening, elution, leacheate collect guide, dynamic monitoring, repeat elution automatically.The elution fills Put including：Crusher, transport device, screening machine, elution field, spray equipment, at least two collecting pits and sedimentation basin etc..It realizes The dystopy elution of contaminated soil.The technique but do not fully consider distribution characteristics of the pollutant in soil in different-grain diameter, screening and It is not strong to elute purpose, screening and elution efficiency are poor.

Soil heterotopic elution recovery technique disclosed in Chinese patent literature CN105598147A is such as《A kind of soil cleaning device And its cleaning method》The utility model discloses a kind of soil cleaning device and its cleaning method, which includes particle Stage unit, soil cleaning unit and sewage treatment unit, the gradation unit are different for soil to be separated into grain size Particle, the soil cleaning unit is for cleaning the soil particle after separation by adding medicament and clear water, at the sewage It manages unit and the soil after cleaning is subjected to separation of solid and liquid, backfilled after the filter cake improvement after separation, the sewage after separation carries out depth Processing.Contaminated soil is carried out multiple grain size grading by the utility model, then by particle size range present in target contaminant collection Interior soil is mixed with eluent to be added in elution reactor, and control and carry out multistage cleaning under certain conditions, will be washed The soil crossed is separated, and is backfilled or is made advanced treating, and the waste liquid for being enriched pollutant discharges or reuse after treatment.The party Method does not fully consider the technology water of current art equipment although specifying distribution characteristics of the pollutant in soil in different-grain diameter It puts down, not yet explicitly the construction of existing wash equipment, cleaning process specific aim is poor, less efficient.

The disclosed dystopy elution recovery techniques being closer to soil property of CN103588367A are such as《Multi-stage self controlling sieves Heavy-metal contaminated soil dystopy governing system》, mainly including regulating reservoir, the first conditioner, the second conditioner, third conditioner and Third conditioner；First conditioner top is provided with vibrating screen, and conveying slag stock pump is connected between regulating reservoir and vibrating screen；Vibration Three-layer screen is provided in sieve from top to bottom, every layer of sieve is connect respectively with a set of belt conveyor；The top of second conditioner Equipped with screw sand washer, screw sand washer is connect with the 4th set of belt conveyor, the top of third conditioner and third conditioner Hydrocyclone is equipped with, two hydrocyclones are respectively connect with a set of belt conveyor, are both provided with and are stirred in three conditioners Mix machine, Pulp pump and particle size analyzer.Although the system has fully considered the larger heavy-metal contaminated soil containing sand fraction Technology enforcement difficulty specifies middle pollutant in the distribution characteristics of different-grain diameter and the process of elution, but does not fully consider soil With in the difference of soil moisture content, particularly contaminated site process of construction dispose the improper stone contents height brought of building waste and The feature that large and small particulate matter adheres to each other.

Thus, it would be highly desirable to for soil moisture content is low, the high and large and small particulate matter of stone contents adheres to each other, stick the spy more than block Point, the structure and operation characteristic and recycling of Size Distribution, existing elution technique equipment with reference to pollutant in soil Utilization ways (refer mainly to the classificating requirement and JGJ52-2006 and JGJ55- according to GB14684-2011 and GB14685-2011 2011 building materials sand and cobble grading requirement), the dedicated dystopy elution circuit of suitable contaminated soil is developed, to difference The soil of grain size and different pollutant loads is eluted and screening process, can be real while mitigating subsequent processing disposition pressure The recycling of different-grain diameter soil after now sieving.

Utility model content

The utility model sticks the spy more than block for soil moisture content is low, the high and large and small particulate matter of stone contents adheres to each other Point with reference to the structure and operation characteristic of Size Distribution and the prior art equipment of soil pollution, provides one kind and automatically controls The method of operation, accurate elution and screening are converted, efficient, the good soil heterotopic elution screening interlock control system of effect, simultaneously A kind of elution method for sieving of elution circuit is provided.

The soil heterotopic elution screening interlock control system of the utility model, using following technical scheme：

The system, including elution device, screening plant and frequency conversion spray pipeline；Elution device includes elution roller, material Pick-up device and speed-adjustable driving device, elution roller are connect with speed-adjustable driving device, and material pick-up device is arranged on elution roller In；Screening plant is connected to the port of export of elution roller；Frequency conversion spray pipeline is set in elution device.

The elution device is connect with breaing up batcher by conveyer of weighing and (breaks up batcher, weigh conveyer and leaching Washing and sieving separating device is sequentially connected).Batcher is broken up for being broken up soil and being advanced into conveyer of weighing；Conveyer of weighing is used for The relatively low soil of breaing up of moisture content is weighed and is delivered to elution screening plant.

Import heavy metal on-line computing model is provided at the elution drum inlet, detection enters the soil in elution roller Middle pollutant load.

The speed-adjustable driving device includes frequency control motor and transmission mechanism, frequency control motor and transmission mechanism it is defeated Enter end connection, the output terminal of transmission mechanism is connect with elution roller.Speed-adjustable driving device can realize that elution roller rotates forward and anti- Turn, and speed can be adjusted to low speed, middling speed and high speed.

The material pick-up device including the transducing unit axially set along elution roller, often arranges transducing unit and includes becoming Plate, shaft, push-pull rod and push-pull mechanism are sent, pick-up plate is often saved and is connect by shaft with push-pull rod, shaft is connected to elution roller On side wall, push-pull rod is connect with push-pull mechanism.Push-pull mechanism drives push-pull rod axial movement, and push-pull rod drives shaft to rotate again, The rotation of shaft changes the often angle of inclination of section pick-up plate to axial again；When the pick-up plate on all single transducing units is homogeneous When axially inclined to elution roller, all pick-up plates are formed helical arrangement, and when elution roller rotates, material will be by spiral The pick-up plate of arrangement promotes forward or backward；When the pick-up plate on all single transducing units is axial each parallel to elution roller When, when elution roller rotates, material would not be pushed, to increase elution time of the material in elution roller.

The screening plant, including being classified screen barrel, screen barrels at different levels are sequentially connected, and there are one sieves for every grade of screen barrel tool Aperture can realize the screening separation of different-grain diameter material after elution successively according to actual needs.The bottom of the screen barrel is set Receiving hopper is equipped with, conveyer is provided with below receiving hopper.Discharging heavy metal on-line computing model is connected in the receiving hopper, with reality When detect pollutant load in outsiftings at different levels.

The frequency conversion spray pipeline, including frequency conversion high-pressure hydraulic pump, vibration means for main pipe for supplying water, water supply branch pipe and nozzle, frequency conversion high pressure water Pump is connect with vibration means for main pipe for supplying water, and water supply branch pipe is connected on vibration means for main pipe for supplying water, and water supply branch pipe is distributed in elution roller and (is not rolled with elution Cylinder connection), nozzle is distributed on water supply branch pipe.Frequency conversion spray pipeline can realize multi-angle and different pressures water spray.The confession Water branch pipe can be axial arranged along elution inner wall of rotary drum, is sprayed with realizing in barrel lenght direction and radially to the multi-angle of material Leaching.

The utility model sticks the spy more than block for soil moisture content is low, the high and large and small particulate matter of stone contents adheres to each other Point, the structure and operation characteristic of Size Distribution, prior art equipment with reference to pollutant in soil and recycling way Diameter (refers mainly to classificating requirement according to GB14684-2011 and GB14685-2011 and JGJ52-2006 and JGJ55-2011 Building materials sand and cobble grading requirement), for the rubble (grain size ＞ 4.75mm) and medium coarse sand (1mm ＜ grain sizes in soil ＜ 4.75mm), the functionality advantage of different drum-type elution circuits is given full play to, emphasis elution is carried out to the said components in soil Screening, while fully consider automatic control requirement, it is easy to operate, it is convenient to carry out, it has the characteristics that：

1. fully considering that soil moisture content is low and the large and small particulate matter of soil adheres to each other, the characteristics of block is more are sticked, according to a huge sum of money Belong to the soil contamination grade that online monitoring data is shown, automatically control the conversion equipment method of operation, different rollings is controlled to stir Intensity, spraying intensity and elution time, accurate elution is realized, save energy consumption and effectively avoid what may be occurred in screening process While the problems such as sieve pore blockade, elution efficiency is improved；By converting adjustable mesh size sum number amount, different grains are realized Diameter, different content of beary metal soil constitution elution separation, achieve the purpose that the classification of soils is handled.

2. can be with the direction of rotation of flexible modulation roller and rotary speed, and then adjust and roll stirring intensity, reach control Elute the purpose of effect；

3. can be with the spray direction of flexible modulation nozzle and spray-water pressure, and then elution intensity is adjusted, reach control Elute the purpose of effect；

4. can be with the inclination angle of the material pick-up device in flexible modulation roller, and then realize and improve the elution time, control leaching Wash effect；

5. can be with flexible modulation mesh size and quantity, and then realize the screening purpose of different-grain diameter soil constitution；

6. it can flexibly switch clear water elution and chemical leaching according to the pollution type and pollution level of soil, utmostly The upper pollution for reducing chemical leaching to environment.

7. by being used in combination for online detection instrument and control system, automatically controlling for elution screening process is realized, Contribute to real-time tracking treatment effect, improve screening efficiency and treatment effeciency.

8. fully combine heavy metal pollution of soil particle Size Distribution, by subsequent processing disposition object lock compared with In small range (being usually below 1mm), it is insufficient effectively to solve current heavy metal pollution of soil control specific aim Problem greatly alleviates subsequent processing disposition difficulty and disposition pressure.

Description of the drawings

Fig. 1 is the principle schematic diagram of the utility model soil heterotopic elution screening interlock control system.

Fig. 2 is the structure diagram of material pick-up device in the utility model.

Fig. 3 is the material advanced state schematic diagram of material pick-up device.

In figure：1. batcher is broken up, 2. conveyers, 3. elution rollers, 4. water supply branch pipes, 5. nozzles, 6. vibration means for main pipe for supplying water, 7. Frequency conversion high-pressure hydraulic pump, 8. transducing units, 9. frequency control motors, 10. transmission devices, 11. screen barrels, 12. spacer rings, 13. dischargings Heavy metal on-line computing model, 14. receiving hoppers, 15. discharging output machines, 16. import heavy metal on-line computing models, 17. push-pull rods, 18. shaft, 19. pick-up plates.

Specific embodiment

As described in Figure 1, the soil heterotopic elution screening interlock control system of the utility model, including breaing up batcher 1, claiming Weight conveyer 2, elution device, screening plant and frequency conversion spray pipeline.Break up batcher 1, in weigh conveyer 2 and elution device Elution roller 3 be sequentially connected.It breaks up batcher 1 and conveyer 2 of weighing is using existing equipment.Batcher 1 is broken up for will be native Earth is broken up and is advanced into conveyer 2 of weighing.Conveyer 2 of weighing is used to weighing and being delivered to leaching the relatively low soil of breaing up of moisture content Wash roller 3.Conveyer 2 of weighing can be screw conveyor or belt conveyor.Screening plant is connected to the outlet of elution device End.Frequency conversion spray pipeline is laid in the elution roller 3 of elution screening plant.

Elution device includes elution roller 3, speed-adjustable driving device and material pick-up device.In the input end of elution roller 3 Import heavy metal on-line computing model 16 is set, to detect the pollution level for entering material in elution roller 3.Roller 3 is eluted with adjusting Fast driving device connection；Speed-adjustable driving device includes frequency control motor 9 and transmission device 10, frequency control motor 9 and transmission The input terminal of device 10 is directly connected to or is connected by retarder, and the output terminal of transmission device 10 is connect with elution roller 3.Transmission Gear drive may be used in device 10, and driving gear is directly installed on frequency control motor 9 or on retarder, passively Gear is arranged on elution roller 3.Speed-adjustable driving device can realize that elution roller rotates and reverse, and speed can be adjusted to low speed (10~15r/min), middling speed (15~20r/min) and high speed (20~25r/min).Material pick-up is provided in elution roller 3 Device, as shown in Figure 2 and referring to Fig. 1, material pick-up device includes the multiple rows of transducing unit 8 axially set along elution roller 3, Often row's transducing unit 8 includes pick-up plate 19, shaft 18, push-pull rod 17 and push-pull mechanism (being not drawn into figure), leads on push-pull rod 17 It crosses and more piece pick-up plate 19 is distributed with, often save pick-up plate 19 and connect by shaft 18 with push-pull rod 17, shaft 18 is connected to elution rolling On the side wall of cylinder 3, push-pull rod 17 is connect with push-pull mechanism.Push-pull mechanism drives push-pull rod 17 to move axially, the band again of push-pull rod 17 Turn axis 18 rotates, and the rotation of shaft 18 changes often 17 angle of inclination to axial of section pick-up plate again.When all row's pick-ups When the opposite elution roller 3 of pick-up plate 17 on unit 8 is axially inclined, then all pick-up plates 17 are formed helical arrangement, When eluting the rotation of roller 3, material will forward or backward be promoted by the pick-up plate 17 of helical arrangement.When all row's transducing units When pick-up plate 17 on 8 is each parallel to elution roller 3 axial (being horizontal), when elution roller 3 rotates, material would not be by Push can increase elution time of the material in elution roller 3 in this way.

Screening plant is connected to the port of export of elution roller 3, and including being classified screen barrel 11, screen barrels 11 at different levels connect successively It connects, screen barrel 11 surrounds tubular by sieve, and there are one apertures for the sieve tool of every grade of screen barrel 11, can according to actual needs successively Realize the screening separation of different-grain diameter material after eluting.The mesh size of screen barrels at different levels is outside successively from small to large to be arranged, can To realize successively according to actual needs, material is detached from small particle to large-sized screening after elution in roller.Every grade of screen barrel 11 Bottom be both provided with receiving hopper 14, the lower section of receiving hopper 14 is provided with discharging output machine 15.Discharging is connected in receiving hopper 14 Heavy metal on-line computing model 13, to detect the pollutant load in outsiftings at different levels in real time.Outsifting is defeated through the output machine 15 that discharges It send to specified place, carries out subsequent processing.The material that upper level screen barrel is fallen in order to prevent enters next stage, in adjacent screen mesh Spacer ring 12 is set between cylinder 11.

Frequency conversion spray pipeline, as shown in Figure 1, including frequency conversion high-pressure hydraulic pump 7, vibration means for main pipe for supplying water 6, water supply branch pipe 4 and nozzle 5, Frequency conversion high-pressure hydraulic pump 7 is connect with vibration means for main pipe for supplying water 6, and water supply branch pipe 4 is connected on vibration means for main pipe for supplying water 6, and water supply branch pipe 4 is distributed in elution rolling It (is not connect in cylinder 3 with elution roller 3), water supply branch pipe 4 can be axial arranged along the inner wall of elution roller 3, long in cylinder to realize It spends direction and radially the multi-angle of material is sprayed.Nozzle 5 is distributed on water supply branch pipe 4.Rotary nozzle can be used in nozzle 5. Frequency conversion spray pipeline can realize multi-angle and different pressures water spray, reach preferably elution purpose.

The method that above system carries out soil elution screening, includes the following steps：

(1) soil breaks up feed：

By the soil after dredging send to break up batcher 1 carry out it is broken break up, break up clay block in soil or clay with The combination of sandstone, the soil after breaing up, which drops down onto, weighs on conveyer 2, is delivered to after weighing in elution roller 3.

(2) Soil leaching：

It is detected and entered in elution roller 3 in soil by the import heavy metal on-line computing model 16 for eluting 3 inlet of roller Pollutant load determines soil contamination grade, is divided into slight pollution, intermediate pollution and serious pollution.As long as according to the form below soil As soon as having the content of heavy metal species or other pollutants in the content range of corresponding pollution level, belong to the pollution level：

Heavy metal pollution of soil degree divides table

According to slight pollution, intermediate pollution and serious pollution, correspondingly control speed-adjustable driving device makes elution roller 3 respectively Rotating speed for low speed, middling speed and high speed rotation, and carry out in the following manner：

1. soil contamination grade is determined as slight pollution, then the rotating speed for eluting roller 3 is transferred to low or first gear carries out soil Clear water elution separation, it is low pressure (0.25~0.5MPa), middle pressure (0.5 to be controlled elution water pressure by frequency conversion high-pressure hydraulic pump 7 ~0.75MPa) and high pressure (0.75~1.0MPa).

2. as soil contamination grade is determined as intermediate pollution, then by elute roller 3 rotating speed be transferred to mid ranger to soil into The elution separation of row clear water, is low pressure, medium and high pressure by the control of elution water pressure；

3. as soil contamination grade is determined as serious pollution, then by elute roller 3 rotating speed be transferred to top gear to soil into The elution separation of row clear water, the control of elution water pressure is low pressure, medium and high pressure.

Material pick-up device is adjusted, each pick-up plate 17 is made to be in horizontality, material only rolls in elution roller 3, It will not be pushed, thus can adjust residence time of the soil in elution roller 3.

(3) it sieves：

After soil reaches the elution time of setting in elution roller 3, control material pick-up device makes every section pick-up plate 17 being tilted a certain angle to axial make all pick-up plates 17 form helical arrangements.With the rotation of elution roller 3, material Screen barrel 11 is pushed to, the material of different-grain diameter falls into the receiving hopper 14 of 11 lower section of respective aperture screen barrel, by receiving hopper 14 Discharging heavy metal on-line computing model 13 detect the pollution level of the grain size material, if by a kind of pollution level of grain size material Do not reach requirement, horizontality is in regard to each pick-up plate 17 in control material pick-up device, material is made to stop promoting, after Continue and eluted in elution roller, the rotating speed for eluting roller 3 is transferred to middle speed gear by low or first gear or top gear is transferred to by mid ranger, lead to Frequency conversion spray pipeline is crossed elution is risen to middle pressure by low pressure with water pressure or rises to high pressure by low pressure；Until each screen barrel 11 sieves Each grain size material gone out all reach requirement (when meeting the requirement of related standard, as the cobble after detaching and medium coarse sand (Li Jing≤ The part of 2.36mm) meet related standards and norms GB14685-2011, JGJ52-2006 and JGJ55-2011)；

(4) if above step can not ensure that the pollution level of each grain size material after separation all reaches requirement, Control frequency control motor 9 reversely rotates elution roller 3, and then each pick-up plate 17 in control material pick-up device is in Horizontality makes material stop promoting, and only overturns elution in elution roller, extends stirring leaching of the material in elution roller 3 It washes the time, the control of elution water pressure is low pressure, medium-pressure or high pressure；Until each grain size material that each screen barrel 11 screens out is all Reach requirement；

(5) if above step can not ensure that the pollution level of each grain size material after separation all reaches requirement, Start chemical leaching, carry out chemical leaching or chemical leaching by frequency conversion spray pipeline elutes alternately with clear water, until Each grain size material screened out all reaches requirement.The type and dosage of chemical leaching can determine as needed.

Claims (8)

1. a kind of soil heterotopic elution screening interlock control system, it is characterized in that, it is sprayed including elution device, screening plant and frequency conversion Shower pipe road；Elution device includes elution roller, material pick-up device and speed-adjustable driving device, elutes roller and speed-adjustable driving device Connection, material pick-up device are arranged in elution roller；Screening plant is connected to the port of export of elution roller；Frequency conversion spray pipeline It is set in elution device.

2. soil heterotopic elution screening interlock control system according to claim 1, it is characterized in that, the elution device leads to Conveyer of weighing is crossed to connect with breaing up batcher.

3. soil heterotopic elution screening interlock control system according to claim 1, it is characterized in that, the elution roller enters Import heavy metal on-line computing model is provided at mouthful, detection enters pollutant load in the bed mud in elution roller.

4. soil heterotopic elution screening interlock control system according to claim 1, it is characterized in that, the speed governing driving dress Put and include frequency control motor and transmission mechanism, the input terminal of frequency control motor and transmission mechanism connects, transmission mechanism it is defeated Outlet is connect with elution roller.

5. soil heterotopic elution screening interlock control system according to claim 1, it is characterized in that, the material pick-up dress It puts, including the transducing unit axially set along elution roller, often arranges transducing unit and include pick-up plate, shaft, push-pull rod and push-and-pull Mechanism often saves pick-up plate and is connect by shaft with push-pull rod, and shaft is connected on elution cylinder wall, push-pull rod and push-pull mechanism Connection.

6. soil heterotopic elution screening interlock control system according to claim 1, it is characterized in that, the screening plant, Including being classified screen barrel, screen barrels at different levels are sequentially connected, and there are one mesh sizes for every grade of screen barrel tool.

7. soil heterotopic elution screening interlock control system according to claim 6, it is characterized in that, the bottom of the screen barrel Portion is provided with receiving hopper, and discharging heavy metal on-line computing model is connected in the receiving hopper.

8. soil heterotopic elution screening interlock control system according to claim 1, it is characterized in that, the frequency conversion spray tube Road, including frequency conversion high-pressure hydraulic pump, feed flow supervisor, feed flow branch pipe and nozzle, frequency conversion high-pressure hydraulic pump is connected with feed flow supervisor, feed flow master Feed flow branch pipe is connected on pipe, feed flow branch pipe is distributed in elution roller, and nozzle is distributed on feed flow branch pipe.