CN215657037U

CN215657037U - Pollute soil screening drip washing integrated device

Info

Publication number: CN215657037U
Application number: CN202121975345.0U
Authority: CN
Inventors: 陈小凤; 李志�; 刘丽琴
Original assignee: Chengdu Defei Environmental Engineering Co ltd
Current assignee: Chengdu Defei Environmental Engineering Co ltd
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2022-01-28
Anticipated expiration: 2031-08-20

Abstract

The utility model discloses a polluted soil screening and leaching integrated device which comprises a leaching tank (1), a plurality of leaching mechanisms, a sedimentation tank (11) and a water treatment mechanism, wherein the leaching mechanisms are sequentially arranged in the leaching tank (1) from top to bottom, the sedimentation tank (11) is arranged in the leaching tank (1) and is positioned below the leaching mechanisms, and the water treatment mechanism is communicated with the upper end of the sedimentation tank (11) through a sewage outlet (13). The utility model is provided with a plurality of layers of screens from top to bottom, the aperture of the upper layer of screen is larger than that of the lower layer of screen, when soil falls on the screens, the leacheate sprayed by the spray pipe leaches the soil to remove heavy metal components in the soil, and during the leaching, small-grained soil falls on the lower layer of screen from the upper layer of screen, so that the screening of the soil with different grain sizes is realized, and the screened soil falls on the corresponding conveyor belt along the screens to be collected. The utility model integrates the leaching mechanism, and the heavy metal components in the leaching solution can be removed through the leaching mechanism, so that the leaching solution can be recycled.

Description

Pollute soil screening drip washing integrated device

Technical Field

The utility model relates to the technical field of soil treatment equipment, in particular to a polluted soil screening and leaching integrated device.

Background

For heavy metal contaminated soil, the currently adopted remediation technologies include stable solidification, blocking landfill, leaching and the like. If heavy metals in the stably solidified soil still have a certain release risk under the long-term leaching of acid rain, and the treated soil needs to be matched with a blocking landfill site to be constructed or transported to a common industrial solid waste landfill site for landfill, the problems of difficult site selection of the blocking landfill site, high construction cost, long transportation distance and the like exist. The leaching technology adopts the means of physical separation or synergistic elution and the like, separates the components of the heavy metal polluted soil by adding water or a proper synergist, effectively reduces the treatment amount of the polluted soil, realizes the reduction, and the wastewater of the leaching system is recycled or discharged after reaching the standard after being treated to remove pollutants. However, the existing soil washing equipment is poor in integration and inconvenient to transport, and the treated soil cannot be classified according to size and grade, so that the use requirement cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems and provides a polluted soil screening and leaching integrated device capable of classifying the treated soil according to the size and grade.

The purpose of the utility model is realized by the following technical scheme: a polluted soil screening and leaching integrated device comprises a leaching tank, a plurality of leaching mechanisms, a sedimentation tank and a water treatment mechanism, wherein the leaching mechanisms are sequentially arranged in the leaching tank from top to bottom; the leaching mechanism comprises a screen with one end connected to the side wall of the leaching tank, a spraying pipe arranged above the screen, and a conveying belt penetrating through the leaching tank and arranged below the screen; the discharge end downward sloping of screen cloth, and the conveyer belt is located the below of the discharge end of screen cloth, water treatment mechanism and shower intercommunication.

The leaching mechanism also comprises a beating motor arranged on the leaching tank, and a cam which is arranged on a main shaft of the beating motor and is positioned below the screen; the cam can hit the screen when rotating.

And the edges of two sides of the screen are provided with baffle walls.

The water treatment mechanism comprises a water treatment tank, a reaction bin, an air blowing bin and a precipitation bin which are sequentially arranged inside the water treatment tank and are sequentially communicated, a stirring mechanism arranged in the reaction bin, and an air blowing pipe arranged at the bottom of the air blowing bin; the side wall of the blowing bin is provided with a notch, and the top of the blowing bin is provided with an exhaust port; the top in reaction storehouse is provided with the medicament and adds the mouth, be provided with the leacheate retrieval and utilization export on the precipitation storehouse, the leacheate retrieval and utilization export passes through wet return and shower intercommunication, reaction storehouse and sedimentation tank intercommunication.

The stirring mechanism comprises a stirring motor arranged on the water treatment tank, and stirring paddles which are arranged on a main shaft of the stirring motor and the lower end of which extends into the reaction bin.

The conveying belt comprises a mesh belt and a filter layer paved on the upper surface of the mesh belt.

The top of the leaching tank is provided with a feed inlet and an access door, and the feed inlet is positioned above the screen.

The bottom of the sedimentation tank is obliquely arranged and is provided with a sewage draining outlet.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

(1) the utility model is provided with a plurality of layers of screens from top to bottom, the aperture of the upper layer of screen is larger than that of the lower layer of screen, when soil falls on the screens, the leacheate sprayed by the spray pipe leaches the soil to remove heavy metal components in the soil, and during the leaching, small-grained soil falls on the lower layer of screen from the upper layer of screen, so that the screening of the soil with different grain sizes is realized, and the screened soil falls on the corresponding conveyor belt along the screens to be collected.

(2) The utility model integrates the screening and leaching mechanism, and the heavy metal in the soil can be removed by the screening and leaching mechanism.

(3) The utility model integrates an eluent treatment, recycling and reusing mechanism, and removes heavy metal components in the eluent by adding a medicament, so that the eluent can be reused.

Drawings

FIG. 1 is a cross-sectional view of a side view of the present invention.

Fig. 2 is a sectional view of the front view of the present invention.

FIG. 3 is a cross-sectional view of the conveyor belt of the present invention.

The reference numbers in the above figures refer to: 1-leaching tank, 2-access door, 3-charge door, 4-shower, 5-cam, 6-hit hitting motor, 7-fender enclose, 8-screen cloth, 9-conveyer belt installing port, 10-conveyer belt, 11-sedimentation tank, 12-drain, 13-sewage outlet, 14-blowing bin, 15-stirring motor, 16-water treatment tank, 17-medicament inlet, 18-notch, 19-exhaust port, 20-sedimentation bin, 21-reaction bin, 22-traction motor, 23-stirring pulp, 24-mesh belt, 25-filter layer, 26-blowing pipe, 27-leacheate recycling outlet.

Detailed Description

The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.

Examples

As shown in fig. 1 and 2, the utility model discloses a polluted soil screening and leaching integrated device, which comprises a leaching tank 1, wherein a plurality of leaching mechanisms are arranged in the leaching tank 1, and the leaching mechanisms are sequentially distributed from top to bottom.

As shown in fig. 1, the leaching mechanism includes a screen 8 with one end connected to the side wall of the leaching tank 1, a spraying pipe 4 disposed above the screen 8, and a conveyor belt 10 penetrating the leaching tank 1 and disposed below the screen 8. Specifically, the screen 8 is installed on the side wall of the spray washing tank 1 through a hinged hinge, the discharge end of the screen 8 is inclined downwards, and the conveyor belt 10 is located below the discharge end of the screen 8. The spray pipe 4 is arranged to spray the leacheate onto the screen 8 from multiple directions to better wash the soil. The screen 8 is provided with meshes, and the mesh size of the upper layer of screen 8 is larger than that of the lower layer of screen 8. During the use, 4 spun leacheate of shower drip washing to soil, get rid of the heavy metal composition in the soil, during this period, the soil of small granule falls lower floor's screen cloth 8 from upper screen cloth 8, and large granule soil then stops on upper screen cloth 8, and the leacheate falls the bottom of leaching tank 1 behind screen cloth 8, realizes the screening of different particle diameter soil, and the soil after the screening rolls down along screen cloth 8, falls into on conveyer belt 10, sends out leaching tank 1 by conveyer belt 10 and reprocesses.

The spraying tank 1 is provided with a conveyor belt mounting port 9 for extending the conveyor belt 10, the mounting mode of the conveyor belt 10 is the same as that of the traditional technology, namely, a support is arranged on the spraying tank 1, a rotating shaft is mounted on the support, the conveyor belt 10 is mounted on the rotating shaft, and the rotating shaft is driven by a traction motor 22 to rotate, so that the conveyor belt 10 moves.

As shown in fig. 3, the conveyor belt 10 includes a mesh belt 24, and a filter layer 25 laid on the upper surface of the mesh belt 24, wherein the filter layer 25 is a polyester filter cloth or a polyester filter screen. During the process of conveying, the soil falling on the conveyor belt 10 drops the residual liquid in the soil to the bottom of the leaching tank 1 through the filter layer 25 and the mesh belt 24.

In order to make the soil roll down from the screen mesh 8 onto the conveyor belt 10 more smoothly, as shown in fig. 1, the washing mechanism further includes a striking motor 6 disposed on the washing tank 1, and a cam 5 mounted on a main shaft of the striking motor 6 and located below the screen mesh 8. During the use, hit and beat motor 6 and drive cam 5 rotatory, and can hit screen cloth 8 during cam 5 is rotatory, make screen cloth 8 produce vibrations, soil then can be better downstream, prevent that soil from piling up on screen cloth 8.

The two side edges of the screen mesh 8 are provided with retaining walls 7, and when the screen mesh 8 is prevented from vibrating through the retaining walls 7, soil falls off from the side face of the screen mesh 8. In addition, a baffle enclosure may be provided on the conveyor belt 10 to prevent soil from falling.

The top of the leaching tank 1 is provided with a feed inlet 3 and an access door 2, wherein the feed inlet 3 is positioned above the screen 8 and used for feeding soil to be treated into the leaching tank 1, and the fed soil can fall on the screen 8 on the uppermost layer.

In addition, a sedimentation tank 11 is arranged in the leaching tank 1, the sedimentation tank 11 is positioned below the lowest leaching mechanism, and the leaching liquid dropping from the screen 8 and the conveyor belt 10 falls into the sedimentation tank 11 for sedimentation.

In addition, the outer side of the leaching tank 1 is also provided with a water treatment mechanism, and the upper end of the sedimentation tank 11 is communicated with the water treatment mechanism through a sewage outlet 13. The leacheate dropped into the sedimentation tank 11 is precipitated in the sedimentation tank 11, soil dissolved in the leacheate is deposited at the bottom of the sedimentation tank 11, and the leacheate at the upper layer enters a water treatment mechanism from a sewage outlet 13. The bottom of the sedimentation tank 11 is arranged obliquely and is provided with a sewage draining outlet 12, and the deposited soil can be drained through the sewage draining outlet 12.

The water treatment mechanism comprises a water treatment tank 16, wherein a reaction bin 21, an air blowing bin 14 and a precipitation bin 20 are sequentially arranged in the water treatment tank 16, the reaction bin 21 is communicated with the precipitation tank 11, the upper end of the reaction bin 21 is communicated with the air blowing bin 14, and the upper end of the air blowing bin 14 is communicated with the precipitation bin 20.

Be provided with rabbling mechanism in this reaction storehouse 21, specifically, this rabbling mechanism is including setting up agitator motor 15 on water treatment tank 16, installs on agitator motor 15's the main shaft and the lower extreme stretches into the inside stirring of reaction storehouse 21 and stirs thick liquid 23. In addition, a chemical inlet 17 is provided at the top of the reaction chamber 21.

During the use, the leacheate enters into the reaction bin 21 from the sewage outlet 13, the precipitator is added into the reaction bin 21 through the medicament adding port 17, the stirring motor 15 is started to enable the stirring paddle 23 to rotate, the sewage in the reaction bin is stirred, the sewage in the reaction bin 21 is enabled to be more fully reacted with the precipitator, flocculate is formed after the heavy metal in the sewage reacts with the precipitator, and the flocculate enters into the blowing bin 14 from the upper end of the reaction bin 21.

The bottom of the blowing bin 14 is provided with a blowing pipe 26, the side wall of the blowing bin 14 is provided with a notch 18, and the top of the blowing bin is provided with an exhaust port 19. When in use, air is introduced from the air blowing pipe 26, bubbles are attached to the flocculate and drive the flocculate to move upwards and float on the liquid surface to form froth, and the froth is discharged from the notch 18. The communicating opening of the air blowing bin 14 and the settling bin 20 is slightly lower than the notch 18, and a filter screen is arranged on the communicating opening, and the leacheate after removing flocculates enters the settling bin 20 from the communicating opening and then is settled.

An eluent recycling outlet 27 is arranged on the precipitation bin 20, the eluent recycling outlet 27 is communicated with the spray pipe 4 through a water return pipe, and the treated eluent is reused; of course, a buffer tank may be provided between the settling bin 20 and the shower pipe 4, and a required chemical may be added to the leacheate from the buffer tank when in use. Meanwhile, the upper cover of the water treatment tank 16 in this embodiment may also be configured to be openable to facilitate maintenance of the interior thereof.

When the device is used, soil to be treated is added from the feeding port 3, the soil falls on the screen 8, and meanwhile, the spray pipe 4 sprays leacheate to the soil to remove heavy metals in the soil. And meanwhile, the beating motor 6 drives the cam 5 to rotate, so that the cam 5 beats the screen 8, the soil on the screen falls down onto the conveyor belt 10, the soil is conveyed to the outside of the leaching tank 1 by the conveyor belt 10 to be recycled, and the small-particle soil falls onto the screen 8 on the lower layer to be leached continuously. The leacheate falls into the sedimentation tank 11 to be settled, the upper layer leacheate enters the water treatment mechanism and reacts in the reaction bin 21 to enable heavy metal components to form flocculates, and the flocculates are discharged from the notch 18 on the air blowing bin 14. The treated leacheate is returned to the spray pipe 4 for recycling. When in use, sewage is left in the sedimentation tank 11 and can be discharged and collected through the sewage discharge outlet 12 and then discharged after treatment; although the present application does not directly treat the sewage remaining in the sedimentation tank 11, the amount of the sewage remaining therein is small, and therefore, the effect of the present application is not affected. The size of the device in this embodiment can set up as required, the convenient transportation.

As described above, the present invention can be preferably realized.

Claims

1. The polluted soil screening and leaching integrated device is characterized by comprising a leaching tank (1), a plurality of leaching mechanisms, a sedimentation tank (11) and a water treatment mechanism, wherein the leaching mechanisms are sequentially arranged in the leaching tank (1) from top to bottom, the sedimentation tank (11) is arranged in the leaching tank (1) and is positioned below the leaching mechanisms, and the water treatment mechanism is communicated with the upper end of the sedimentation tank (11) through a sewage outlet (13); the leaching mechanism comprises a screen (8) with one end connected to the side wall of the leaching tank (1), a spray pipe (4) arranged above the screen (8), and a conveyor belt (10) penetrating through the leaching tank (1) and arranged below the screen (8); the discharge end downward sloping of screen cloth (8), and conveyer belt (10) are located the below of the discharge end of screen cloth (8), water treatment mechanism and shower (4) intercommunication.

2. The polluted soil screening and leaching integrated device according to claim 1, wherein the leaching mechanism further comprises a hitting motor (6) arranged on the leaching tank (1), and a cam (5) which is arranged on a main shaft of the hitting motor (6) and is positioned below the screen (8); the cam (5) can hit the screen (8) when rotating.

3. The integrated device for screening and washing of polluted soil as claimed in claim 1 or 2, wherein the two side edges of the screen (8) are provided with retaining walls (7).

4. The polluted soil screening and leaching integrated device according to claim 1, wherein the water treatment mechanism comprises a water treatment tank (16), a reaction bin (21), an air blowing bin (14) and a precipitation bin (20) which are sequentially arranged inside the water treatment tank (16) and are sequentially communicated, a stirring mechanism arranged in the reaction bin (21), and an air blowing pipe (26) arranged at the bottom of the air blowing bin (14); a notch (18) is formed in the side wall of the blowing bin (14), and an exhaust port (19) is formed in the top of the blowing bin; the top of the reaction bin (21) is provided with a medicament adding port (17); an eluent recycling outlet (27) is formed in the sedimentation bin (20), the eluent recycling outlet (27) is communicated with the spray pipe (4) through a water return pipe, and the reaction bin (21) is communicated with the sedimentation tank (11).

5. The integrated device for screening and leaching of polluted soil as claimed in claim 4, wherein the stirring mechanism comprises a stirring motor (15) arranged on the water treatment tank (16), and a stirring paddle (23) which is arranged on a main shaft of the stirring motor (15) and the lower end of which extends into the reaction bin (21).

6. A contaminated soil screening and washing integrated device according to claim 1, wherein said conveyor belt (10) comprises a mesh belt (24), a filter layer (25) being laid on the upper surface of the mesh belt (24).

7. The integrated device for screening and leaching of polluted soil as claimed in claim 1, wherein a feed inlet (3) and an access door (2) are arranged at the top of the leaching tank (1), and the feed inlet (3) is positioned above the screen (8).

8. A contaminated soil screening and washing integrated apparatus according to claim 1, wherein the bottom of said sedimentation tank (11) is inclined and is provided with a sewage draining outlet (12).