CN216827893U

CN216827893U - Soil leaching pilot scale experimental facilities

Info

Publication number: CN216827893U
Application number: CN202220117434.XU
Authority: CN
Inventors: 陈翔欣; 陈俊毅; 李明奎
Original assignee: Guangzhou Runfang Environmental Protection Technology Co ltd
Current assignee: Guangzhou Runfang Environmental Protection Technology Co ltd
Priority date: 2022-01-17
Filing date: 2022-01-17
Publication date: 2022-06-28
Anticipated expiration: 2032-01-17

Abstract

The utility model discloses a soil leaching pilot scale experimental facilities, include: the leaching mixing device is provided with a soil leaching chamber for leaching soil; the soil feeding system is used for feeding soil to be leached to the soil leaching chamber; the first agent feeding system is used for feeding leacheate into the soil leaching chamber; the stirring device is used for stirring and mixing the soil entering the soil leaching chamber and the leaching solution; the first solid-liquid separation system comprises a first solid-liquid separation device and a first conveying pipeline, and the soil leaching chamber is communicated with the first solid-liquid separation device through the first conveying pipeline; the sedimentation device is provided with a sedimentation tank for carrying out sedimentation reaction, and a liquid outlet of the first solid-liquid separation device is communicated with the sedimentation tank; the second agent feeding system is used for feeding a precipitation reaction agent into the sedimentation tank; and the second solid-liquid separation system comprises a second solid-liquid separation device and a second conveying pipeline, and the sedimentation tank is communicated with the second solid-liquid separation device through the second conveying pipeline.

Description

Soil leaching pilot test experimental facility

Technical Field

The utility model relates to a heavy metal contaminated soil repair equipment technical field especially relates to a soil leaching pilot scale experimental facilities.

Background

With the rapid development of modern industry and agriculture in China, the heavy metal pollution of soil is increasingly serious, and the heavy metal generally has the characteristics of strong biotoxicity, difficult degradability and the like, thereby causing serious harm to the ecological environment and human health. At present, soil leaching is an effective treatment technology, is suitable for rapidly repairing heavy metal contaminated soil, leacheate is injected or permeated into the soil and flows through a soil layer to be treated, the leacheate reacts with heavy metals in a solid phase of the soil to form soluble heavy metal ions or metal complexes, and then the leacheate containing the heavy metals is treated and recycled.

With the rapid outbreak of the heavy metal contaminated soil treatment market, the demand of the soil remediation market on equipment is more and more urgent, and particularly, the leaching equipment can be operated quickly and efficiently and has low cost. However, most domestic soil heavy metal leaching equipment occupies a large area, is high in cost and complex in operation, and is difficult to produce on a large scale. Therefore, it is necessary to develop a soil heavy metal leaching device which has low cost, small occupied area and high flexibility, can be popularized and applied to the aspect of scientific research experiments, and can also be applied to engineering pilot experiments.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a soil leaching pilot scale experimental facilities both can use in the aspect of scientific research and teaching, can carry out the pilot scale experiment and the restoration effect verification of engineering with it again.

According to the utility model discloses a soil drip washing pilot scale experimental facilities, include:

the leaching mixing device is provided with a soil leaching chamber for leaching soil;

the soil feeding system is used for feeding soil to be leached to the soil leaching chamber;

the first agent feeding system is used for feeding leacheate into the soil leaching chamber;

the stirring device is used for stirring and mixing the soil entering the soil leaching chamber and the leaching solution;

the first solid-liquid separation system comprises a first solid-liquid separation device and a first conveying pipeline, wherein the soil leaching chamber is communicated with the first solid-liquid separation device through the first conveying pipeline and is used for conveying a mud-water mixture in the soil leaching chamber into the first solid-liquid separation device;

the sedimentation device is provided with a sedimentation tank for carrying out sedimentation reaction, and a liquid outlet of the first solid-liquid separation device is communicated with the sedimentation tank;

the second agent feeding system is used for feeding a precipitation reaction agent into the sedimentation tank;

and the second solid-liquid separation system comprises a second solid-liquid separation device and a second conveying pipeline, and the sedimentation tank is communicated with the second solid-liquid separation device through the second conveying pipeline and is used for conveying the sediment in the sedimentation tank into the second solid-liquid separation device.

According to the utility model discloses soil drip washing pilot scale experimental facilities has following beneficial effect at least: when a pilot test experiment for soil leaching is carried out, a soil feeding system feeds soil to be leached into a soil leaching chamber, a first agent feeding system feeds a leaching solution into the soil leaching chamber, and the soil and the leaching solution are stirred in the soil leaching chamber through a stirring device to obtain a mud-water mixture after the soil and the leaching solution are mixed; then, conveying the mud-water mixture in the soil leaching room into a first solid-liquid separation device through a first conveying pipeline, carrying out solid-liquid separation on the mud-water mixture to obtain heavy metal enriched liquid, purifying the heavy metal soil, and conveying the separated heavy metal enriched liquid into a precipitation device; meanwhile, a precipitation reaction agent is added into the sedimentation tank by the second agent adding system, the precipitation reaction agent reacts with heavy metal elements in the heavy metal enriched liquid to generate metal precipitates, the generated metal precipitates are conveyed into the second solid-liquid separation device through the second conveying pipeline, and the solid containing the heavy metals is obtained through the solid-liquid separation effect of the second solid-liquid separation device.

According to some embodiments of the utility model, soil feed system includes loading hopper and feed controller, the loading hopper is used for throwing the soil, the loading hopper passes through feed controller with soil drip washing room intercommunication, feed controller can control throwing of soil with the speed of throwing.

According to some embodiments of the utility model, feed controller includes a feed cylinder, spiral feeding shaft and a power device, the feed cylinder level sets up, the feed cylinder is equipped with feed inlet and bin outlet, the feed inlet with the bin outlet is close to respectively the both ends setting of feed cylinder, just the feed inlet sets up the upper portion of feed cylinder, the bin outlet sets up the lower part of feed cylinder, the loading hopper with the feed inlet intercommunication, the bin outlet with soil drip washing room intercommunication, spiral feeding shaft level sets up in the feed cylinder, and by the feed inlet court the bin outlet direction sets up, spiral feeding shaft with a power device transmission is connected, a power device can control the rotational speed of spiral feeding shaft.

According to some embodiments of the utility model, first medicament dispensing system includes first reagent box, first medicament conveying line, feed liquor funnel, first reagent box is equipped with the leacheate, be equipped with first medicament agitating unit in the first reagent box, the liquid outlet of feed liquor funnel with soil drip washing room is linked together, first reagent box with the feed liquor funnel passes through first medicament conveying line is linked together.

According to some embodiments of the utility model, agitating unit includes (mixing) shaft and drive (mixing) shaft pivoted second power device, the (mixing) shaft with the transmission of second power device is connected, the vertical setting of (mixing) shaft is in the soil drip washing room, the (mixing) shaft can vertical adjusting position height, second power device can adjust the rotational speed of (mixing) shaft.

According to some embodiments of the present invention, the first solid-liquid separation device is a plate-and-frame filter press, and the number of the plate-and-frame filter presses is at least one.

According to the utility model discloses a some embodiments, first solid-liquid separation equipment's liquid outlet with be linked together through the third pipeline between the sedimentation tank, the third pipeline includes raceway and water distributor, the one end of raceway with first solid-liquid separation equipment's liquid outlet intercommunication, the other end with the water distributor intercommunication, the water distributor sets up in the sedimentation tank, the water distributor is equipped with a plurality of delivery ports, the delivery port of water distributor evenly lays in the sedimentation tank.

According to the utility model discloses a some embodiments, second medicament dispensing system includes second reagent case, second medicament delivery line, second reagent case is equipped with the precipitation reaction medicament, be equipped with second medicament agitating unit in the second reagent case, the second reagent case passes through second medicament delivery line with the raceway is linked together.

According to the utility model discloses a some embodiments, the sedimentation tank includes precipitation reaction zone and precipitation collecting region, the setting of precipitation collecting region is in the bottom of sedimentation tank, the precipitation collecting region includes a plurality of big-end-up's precipitation tanks, the precipitation tank is laid the bottom of sedimentation tank, be equipped with the mud pipe in the precipitation tank, the equidistant mud hole of advancing of having seted up of mud pipe, the mud pipe with second solid-liquid separation equipment passes through the second pipeline is linked together, the setting of precipitation reaction zone is in the top of precipitation collecting region, first solid-liquid separation equipment's liquid outlet passes through the third pipeline with the precipitation reaction zone is linked together.

According to the utility model discloses a some embodiments still include eluent recovery system, eluent recovery system includes first recovery pipeline and second recovery pipeline, first recovery pipeline's one end with the precipitation reaction district is linked together, the other end with soil drip washing room is linked together, the second recovery pipeline's one end with second solid-liquid separation equipment's liquid outlet is linked together, the other end with soil drip washing room is linked together.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural diagram of a pilot test experimental facility for soil leaching according to an embodiment of the present invention;

FIG. 2 is a schematic view of the connection between the leaching mixing device and the soil feeding system, the first agent dosing system, and the stirring device;

FIG. 3 is a schematic diagram of a soil feeding system;

FIG. 4 is a schematic structural view of a precipitation apparatus;

FIG. 5 is a schematic structural view of a second solid-liquid separation apparatus.

Reference numerals:

100. leaching and mixing device; 110. a soil leaching chamber;

200. a soil feeding system; 210. a hopper; 220. a feed controller; 221. a feeding cylinder; 222. a screw feed shaft; 223. a first power unit;

300. a first agent delivery system; 310. a first reagent tank; 320. a first medicament delivery conduit; 330. a liquid inlet funnel;

400. a stirring device;

500. a first solid-liquid separation system; 510. a first solid-liquid separation device; 520. a first delivery line;

600. a precipitation device; 610. a sedimentation tank; 611. a precipitation reaction zone; 612. a sedimentation collection zone; 620. a settling tank; 630. a sludge discharge pipe;

700. a second agent delivery system; 710. a second reagent tank; 720. a second medicament delivery conduit;

800. a second solid-liquid separation system; 810. a second solid-liquid separation device; 811. a cylinder cover; 812. a barrel; 820. a second delivery line;

910. a water delivery pipe; 920. a water distribution pipe; 930. a first recovery line; 940. a second recovery line.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

The soil washing pilot test experimental facility of the embodiment of the present invention is described below with reference to fig. 1 to 5.

As shown in fig. 1 and fig. 2, according to the utility model discloses soil washing pilot scale experimental facilities of embodiment includes:

a leaching mixing device 100 provided with a soil leaching chamber 110 for leaching soil;

a soil feeding system 200 for feeding the soil to be washed to the soil washing chamber 110;

a first agent delivery system 300 for delivering an leacheate to the soil leaching chamber 110;

a stirring device 400 for stirring and mixing the soil and the leacheate entering the soil leaching chamber 110;

the first solid-liquid separation system 500 comprises a first solid-liquid separation device 510 and a first conveying pipeline 520, wherein the soil leaching chamber 110 is communicated with the first solid-liquid separation device 510 through the first conveying pipeline 520, and is used for conveying a mud-water mixture in the soil leaching chamber 110 into the first solid-liquid separation device 510;

the sedimentation device 600 is provided with a sedimentation tank 610 for carrying out sedimentation reaction, and a liquid outlet of the first solid-liquid separation device 510 is communicated with the sedimentation tank 610;

a second agent feeding system 700 for feeding a precipitation reaction agent to the precipitation tank 610;

the second solid-liquid separation system 800 comprises a second solid-liquid separation device 810 and a second conveying pipeline 820, wherein the sedimentation tank 610 and the second solid-liquid separation device 810 are communicated through the second conveying pipeline 820 and used for conveying sediments in the sedimentation tank 610 to the second solid-liquid separation device 810.

When a pilot test experiment of soil leaching is carried out, the soil feeding system 200 feeds soil to be leached into the soil leaching chamber 110, the first agent feeding system 300 feeds leaching solution into the soil leaching chamber 110, and the soil and the leaching solution are stirred in the soil leaching chamber 110 through the stirring device 400, so that a mud-water mixture obtained after the soil and the leaching solution are mixed is obtained.

Then, the mud-water mixture in the soil leaching chamber 110 is conveyed into a first solid-liquid separation device 510 through a first conveying pipeline 520, solid-liquid separation is performed on the mud-water mixture, heavy metal enriched liquid is obtained, the soil containing heavy metals is purified, and the separated heavy metal enriched liquid is conveyed into a sedimentation tank 610; meanwhile, the second agent adding system 700 adds a precipitation reaction agent into the sedimentation tank 610, the precipitation reaction agent reacts with heavy metal elements in the heavy metal enriched liquid to generate metal precipitates, the generated metal precipitates are mixed with the tank water and conveyed into the second solid-liquid separation device 810 through the second conveying pipeline 820, and the solid containing heavy metals is obtained through the solid-liquid separation effect of the second solid-liquid separation device 810.

In some embodiments of the present invention, the soil feeding system 200 comprises a hopper 210 and a feeding controller 220, the hopper 210 is used for feeding soil, the hopper 210 is communicated with the soil leaching chamber 110 through the feeding controller 220, and the feeding controller 220 can control the feeding speed of the soil.

In this embodiment, the soil in the loading hopper 210 is transported to the soil leaching chamber 110 through the feeding controller 220, and the mixing ratio of the soil and the leaching agent can be controlled by controlling the feeding speed of the soil through the feeding controller 220.

The utility model discloses a further embodiment, feed controller 220 includes feed cylinder 221, spiral feeding shaft 222 and first power device 223, feed cylinder 221 level sets up, feed cylinder 221 is equipped with feed inlet and bin outlet, feed inlet and bin outlet are close to the both ends setting of feed cylinder 221 respectively, and the feed inlet sets up the upper portion at feed cylinder 221, the bin outlet sets up the lower part at feed cylinder 221, loading hopper 210 and feed inlet intercommunication, bin outlet and soil drench washing room 110 intercommunication, spiral feeding shaft 222 level sets up in feed cylinder 221, and set up towards the bin outlet direction by the feed inlet, spiral feeding shaft 222 and first power device 223 transmission are connected, first power device 223 can control the rotational speed of spiral feeding shaft 222.

In the embodiment, as shown in fig. 3, soil fed from the hopper 210 enters the feeding cylinder 221 through the hopper 210, the screw feeding shaft 222 is driven by the first power device 223 to rotate, and in the process of rotation of the screw feeding shaft 222, the soil is conveyed from the feeding port to the discharging port, and the soil enters the soil leaching chamber 110 from the discharging port. The first power device 223 can control the speed of the soil entering the soil leaching chamber 110 by controlling the rotating speed of the screw feeding shaft 222, so as to control the entering amount of the soil.

In some embodiments of the present invention, the first reagent dispensing system 300 includes a first reagent box 310, a first reagent conveying pipeline 320, a liquid inlet funnel 330, the first reagent box 310 is equipped with a leaching solution, a first reagent stirring device is disposed in the first reagent box 310, a liquid outlet of the liquid inlet funnel 330 is communicated with the soil leaching chamber 110, and the first reagent box 310 and the liquid inlet funnel 330 are communicated through the first reagent conveying pipeline 320.

In this embodiment, the leacheate in the first reagent tank 310 is transferred to the inlet funnel 330 through the first reagent transfer pipeline 320, and then flows into the soil leaching chamber 110 through the inlet funnel 330. Wherein, be equipped with the water pump on the first medicament delivery pipeline 320, guarantee the flow of leacheate, be equipped with first medicament agitating unit in the first reagent case 310 and can stir the liquid medicine in the first reagent case 310 and mix, avoid the liquid medicine in the first reagent case 310 because of the static condition that the liquid medicine layering leads to the drug effect to reduce that appears for a long time.

The utility model discloses an in some embodiments, agitating unit 400 includes (mixing) shaft and drive (mixing) shaft pivoted second power device, and the transmission of (mixing) shaft and second power device is connected, and the vertical setting of (mixing) shaft is in soil drenches room 110, and the (mixing) shaft can vertical adjusting position height, and the rotational speed of (mixing) shaft can be adjusted to second power device.

In this embodiment, the (mixing) shaft passes through vertical adjusting position height, can be better mixes soil and leacheate in soil leaching room 110, can adjust the rotational speed of (mixing) shaft through second power device, can adjust the stirring rate of (mixing) shaft. Adjust the high position of (mixing) shaft can adopt elevating gear to adjust the position height of whole agitating unit 400, reaches the purpose of adjusting the high position of (mixing) shaft, also can be through selecting for use the (mixing) shaft that can vertically stretch out and draw back, through flexible adjusting position height.

In some embodiments of the present invention, the first solid-liquid separation device 510 is a plate-and-frame filter press, and the number of the plate-and-frame filter presses is at least one.

In this embodiment, the number of plate and frame filter press is two, and two plate and frame filter press adopt the mode of connecting in parallel to improve separation efficiency, and plate and frame filter press is equipped with water inlet and delivery port, and the water inlet is linked together with first pipeline 520, and the delivery port is linked together with the sedimentation tank.

In some embodiments of the utility model, be linked together through the third conveying line between the liquid outlet of first solid-liquid separation equipment and the sedimentation tank 610, the third conveying line includes raceway 910 and water distributor 920, the one end of raceway 910 and the liquid outlet of first solid-liquid separation equipment 510 communicate, the other end and water distributor 920 communicate, water distributor 920 sets up in sedimentation tank 610, water distributor 920 is equipped with a plurality of delivery ports, the delivery port of water distributor 920 evenly lays in sedimentation tank 610.

In this embodiment, the heavy metal concentrated solution separated by the first solid-liquid separation device 510 enters the water pipe 910 from the liquid outlet, and then flows into the sedimentation tank 610 through the water distribution pipe 920. Through setting up water distributor 920, can make the heavy metal enrichment liquid that flows into sedimentation tank 610 and precipitation reaction medicament mix more evenly, improve and subside efficiency.

In some embodiments of the present invention, the second reagent feeding system 700 includes a second reagent box 710 and a second reagent conveying pipeline 720, the second reagent box 710 contains the precipitation reaction reagent, a second reagent stirring device is disposed in the second reagent box 710, and the second reagent box 710 is communicated with the water conveying pipe 910 through the second reagent conveying pipeline 720.

In this embodiment, the precipitation reaction reagent in the second reagent tank 710 flows into the water pipe 910 through the second reagent delivery pipe 720, is mixed with the heavy metal-enriched liquid in the water pipe 910, and further mixed in the flowing process of the water pipe 910, and then flows into the precipitation tank 610 through the water distribution pipe 920, so that the mixing efficiency can be improved, and the precipitation reaction time can be reduced. In other embodiments, the chemical solution in the second reagent tank 710 may be directly delivered to the sedimentation tank 610, and then mixed and reacted with the heavy metal-enriched liquid in the sedimentation tank 610.

In some embodiments, a metering pump and a flow meter are disposed on each of the first drug delivery pipeline 320 and the second drug delivery pipeline 720, and the dosage or the dosage speed of the drug can be adjusted by adjusting the metering pump.

The utility model discloses an in some embodiments, sedimentation tank 610 includes precipitation reaction zone 611 and precipitation collection region 612, precipitation collection region 612 sets up the bottom at sedimentation tank 610, precipitation collection region 612 includes a plurality of big-end-up's precipitation tank 620, precipitation tank 620 lays the bottom at sedimentation tank 610, be equipped with mud pipe 630 in the precipitation tank 620, the equidistant mud hole of advancing of having seted up on mud pipe 630, mud pipe 630 and second solid-liquid separation device 810 are linked together through second pipeline 820, precipitation reaction zone 611 sets up the top at precipitation collection region 612, the liquid outlet of first solid-liquid separation device 510 is linked together through third pipeline and precipitation reaction zone 611.

Referring to fig. 4, in this embodiment, the heavy metal-enriched liquid and the precipitation reaction agent entering the precipitation tank 610 chemically react in the precipitation reaction zone 611, and the generated precipitate descends into each precipitation tank 620 of the precipitation collection zone 612. The second conveying pipeline 820 is provided with a water pump, under the suction action of the water pump, the metal precipitate in the precipitation tank 620 mixed with water flows into the mud pipe 630, and enters the second solid-liquid separation device 810 along the second conveying pipeline 820 for solid-liquid separation, so that the metal precipitate is separated. The design of the settling tank 620 and the sludge discharge pipe 630 can discharge the metal sediment in the settling tank 610 as much as possible.

As shown in fig. 5, the second solid-liquid separator 810 is composed of a cylindrical cover 811 and a cylindrical body 812; a water inlet is arranged at one side of the upper end of the cylinder body 812, and a water outlet is arranged at the bottom end of the cylinder body; the inside of the cylinder 812 is provided with a stainless steel filter bag and a reinforced net basket. The sewage containing heavy metal precipitate in the sludge discharge pipe 630 is conveyed into the cylinder body 812 through the second conveying pipeline 820, and is subjected to solid-liquid separation under the action of the stainless steel filter bag. The residue containing heavy metals is left therein, and the water body is returned to the soil leaching chamber 110 through the second recovery pipe 940.

In some embodiments of the present invention, the device further comprises an eluate recycling system, the eluate recycling system comprises a first recycling pipeline 930 and a second recycling pipeline 940, one end of the first recycling pipeline 930 is linked with the precipitation reaction zone 611, the other end is linked with the soil eluting chamber 110, one end of the second recycling pipeline 940 is linked with the liquid outlet of the second solid-liquid separating device 810, and the other end is linked with the soil eluting chamber 110.

In this embodiment, after the heavy metal enriched liquid and the precipitating agent in the precipitation tank 610 are reacted and precipitated for a period of time, the metal precipitates into the precipitation tank 620, and the main component of the liquid in the upper precipitation reaction zone 611 is the leacheate, and the leacheate on the upper layer of the precipitation tank 610 is pumped into the soil leaching chamber 110 by the first recovery pipeline 930, so as to achieve the purpose of recovering the leacheate.

The solid-liquid mixture entering the second solid-liquid separation device 810 is subjected to solid-liquid separation to obtain metal precipitate solids and leacheate, and the separated leacheate is pumped into the soil leaching chamber 110 by arranging a second recovery pipeline 940, so that the purpose of recovering the leacheate is achieved.

The utility model discloses an in some embodiments, still include switch board, level gauge and pH monitor probe set up in soil drench room 110, and the water pump electric connection in switch board and level gauge, pH monitor probe and each pipeline is used for controlling each course.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A soil leaching pilot test experimental facility, characterized by, includes:

2. The soil washing pilot test experimental facility of claim 1, characterized in that: the soil feed system includes loading hopper and feeding control ware, the loading hopper is used for throwing the soil, the loading hopper passes through feeding control ware with soil drip washing room intercommunication, feeding control ware can control the throwing rate of soil.

3. The soil washing pilot test experimental facility of claim 2, characterized in that: the feeding controller comprises a feeding barrel, a spiral feeding shaft and a first power device, wherein the feeding barrel is horizontally arranged, the feeding barrel is provided with a feeding port and a discharging port, the feeding port is close to the discharging port respectively, the two ends of the feeding barrel are arranged, the feeding port is arranged on the upper portion of the feeding barrel, the discharging port is arranged on the lower portion of the feeding barrel, a feeding hopper is communicated with the feeding port, the discharging port is communicated with a soil leaching chamber, the spiral feeding shaft is horizontally arranged in the feeding barrel, the feeding port faces the direction of the discharging port, the spiral feeding shaft is in transmission connection with the first power device, and the first power device can control the rotating speed of the spiral feeding shaft.

4. The soil washing pilot test experimental facility of claim 1, characterized in that: first medicament dispensing system includes first reagent box, first medicament pipeline, feed liquor funnel, first reagent box is equipped with the leacheate, be equipped with first medicament agitating unit in the first reagent box, the liquid outlet of feed liquor funnel with soil drip washing room is linked together, first reagent box with the feed liquor funnel passes through first medicament pipeline is linked together.

5. The soil washing pilot test plant of claim 1, wherein: the stirring device comprises a stirring shaft and a second power device for driving the stirring shaft to rotate, the stirring shaft is in transmission connection with the second power device, the stirring shaft is vertically arranged in the soil leaching chamber, the height of the stirring shaft can be vertically adjusted, and the rotating speed of the stirring shaft can be adjusted by the second power device.

6. The soil washing pilot test experimental facility of claim 1, characterized in that: the first solid-liquid separation device is a plate-and-frame filter press, and the number of the plate-and-frame filter presses is at least one.

7. The soil washing pilot test experimental facility of claim 1, characterized in that: the liquid outlet of the first solid-liquid separation device is communicated with the sedimentation tank through a third conveying pipeline, the third conveying pipeline comprises a water conveying pipe and a water distribution pipe, one end of the water conveying pipe is communicated with the liquid outlet of the first solid-liquid separation device, the other end of the water conveying pipe is communicated with the water distribution pipe, the water distribution pipe is arranged in the sedimentation tank, the water distribution pipe is provided with a plurality of water outlets, and the water outlets of the water distribution pipe are uniformly distributed in the sedimentation tank.

8. The soil washing pilot test experimental facility of claim 7, characterized in that: the second reagent feeding system comprises a second reagent box and a second reagent conveying pipeline, the second reagent box is filled with precipitation reaction reagents, a second reagent stirring device is arranged in the second reagent box, and the second reagent box is communicated with the water conveying pipe through the second reagent conveying pipeline.

9. The soil washing pilot test experimental facility of claim 7, characterized in that: the sedimentation tank includes precipitation reaction zone and precipitation collecting region, the setting of precipitation collecting region is in the bottom of sedimentation tank, the precipitation collecting region includes a plurality of big-end-up's precipitation tanks, the precipitation tank is laid the bottom of sedimentation tank, be equipped with the mud pipe in the precipitation tank, equidistant mud hole of advancing of having seted up of mud pipe, the mud pipe with second solid-liquid separation equipment passes through the second pipeline is linked together, the setting of precipitation reaction zone is in the top in precipitation collecting region, first solid-liquid separation equipment's liquid outlet passes through the third pipeline with the precipitation reaction zone is linked together.

10. The soil washing pilot test experimental facility of claim 9, wherein: still include eluent recovery system, eluent recovery system includes first recovery pipeline and second recovery pipeline, first recovery pipeline's one end with the precipitation reaction zone is linked together, the other end with soil drip washing room is linked together, second recovery pipeline's one end with second solid-liquid separation equipment's liquid outlet is linked together, the other end with soil drip washing room is linked together.