CN109794500A - A kind of heavy-metal contaminated soil batch-type elution processing unit and method - Google Patents
A kind of heavy-metal contaminated soil batch-type elution processing unit and method Download PDFInfo
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- 238000010828 elution Methods 0.000 title claims abstract description 74
- 239000002689 soil Substances 0.000 title claims abstract description 58
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 30
- 238000012545 processing Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 83
- 238000012216 screening Methods 0.000 claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims description 38
- 239000002351 wastewater Substances 0.000 claims description 20
- 239000000428 dust Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 13
- 238000000926 separation method Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 8
- 238000004062 sedimentation Methods 0.000 claims description 8
- 238000011010 flushing procedure Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000011257 shell material Substances 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 230000001376 precipitating effect Effects 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 5
- 239000003344 environmental pollutant Substances 0.000 claims description 4
- 231100000719 pollutant Toxicity 0.000 claims description 4
- 238000009412 basement excavation Methods 0.000 claims description 3
- 239000007795 chemical reaction product Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 238000005189 flocculation Methods 0.000 claims description 3
- 230000016615 flocculation Effects 0.000 claims description 3
- 238000013508 migration Methods 0.000 claims description 3
- 230000005012 migration Effects 0.000 claims description 3
- 238000003672 processing method Methods 0.000 claims description 3
- 239000007790 solid phase Substances 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 239000013049 sediment Substances 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000011651 chromium Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000003802 soil pollutant Substances 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
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Abstract
The invention discloses a kind of heavy-metal contaminated soil batch-types to elute processing unit.The device includes: belt feeding system, screening system, batch-type elution device, water treatment system.The belt feeding system is connected with screening system, and screening system is connected with batch-type elution device, and batch-type elution device is connected with water treatment system.The present invention compared to conventional soil elution device simple process, low energy consumption, high treating effect, have good environmental benefit, economic benefit and social benefit.
Description
Technical field
The present invention relates to soil pollution recovery technique field, in particular at a kind of heavy-metal contaminated soil batch-type elution
Manage device and method.
Background technique
The reparation of heavy-metal contaminated soil can be divided into in-situ immobilization and showering, in-situ immobilization by the difference of form of construction work
It is generally used for the reparation of middle low-concentration heavy metal contaminated soil, such as original position stabilizes, original position elutes, micro-reduction, original in situ
The recovery techniques such as position electro reclamation；Showering has than in-situ immobilization to soil physico-chemical property, pollution level, form of poluttants
Equal key influence factors feature more adaptable.Therefore, showering technology is in terms of China's heavy-metal contaminated soil reparation
It is very widely used.Currently, heavy-metal contaminated soil showering mainly includes dystopy elution, dystopy two kinds of reparation skills of stabilisation
Art.The dramatically different point of two kinds of showering techniques is that dystopy is stabilized by changing Soil oxidation, reducing condition, reduces soil
The toxicity and activity of middle heavy metal, but total metals are not cut down；Dystopy elution technique realizes heavy metal in leacheate
Separation, significant removal occurs for heavy metal in soil total amount.Dystopy stabilization technology is most widely used, low in cost, reparation
Period is short, but there are long term stability problems for soil after reparation, this is because the total amount of pollutant is not cut down, it is native after reparation
Under field conditions (factors), pollutant in soil easily can be discharged into environment earth again, lead to secondary pollution.And dystopy elution technique is realized
The separation of heavy metal contaminants and soil, after reparation soil pollutant is completely removed, be it is a kind of be worthy of popularization it is green
Color recovery technique.But there are complex process, the prominent question that mud-water separation is difficult, energy consumption is high for dystopy elution technique.
Summary of the invention
Present invention aims at solving the problems, such as that dystopy elution technique complex process, mud-water separation are difficult, energy consumption is high, provide
A kind of simple process, low energy consumption, a kind of heavy-metal contaminated soil batch-type of high treating effect elution processing unit and method.
The purpose of the present invention is what is be achieved through the following technical solutions: a kind of heavy-metal contaminated soil batch-type elution processing
Device, including belt feeding system, screening system, batch-type elution device, plate and frame filter press, water treatment system；
The screening system includes driving motor, gear reducer, screen drum, rack, upper dust hood and high-pressure nozzle；Screen drum into
Material mouth and discharge port are separately positioned on the end face of cylinder, and screen drum inclination is installed in rack, from the feed inlet of screen drum to discharging
Mouth tilts down；Motor is linked together through speed reducer and screen drum by shaft coupling, and upper dust hood is installed on above screen drum, with
Screen drum axis is parallel, and high-pressure nozzle is installed on the inside of dust hood, and the nozzle of high-pressure nozzle is towards screen drum；It is provided with below screen drum
Collection device；Belt feeding system is connected with the feed inlet of screen drum；
The batch-type elution device includes shell, stirrer paddle and cobble bed course；The shell material is steel plate, shape
Shape is upper cylinder, lower part inverted cone structure；Batch-type elution device feed inlet is arranged at the top of batch-type elution device,
It is connected with the collection device of screening system；Agitating paddle is mounted on batch-type elution device center, is higher by cone bottom surface 10
~20cm；The leacheate water outlet of batch-type elution device is arranged in batch-type elution device lower part cone base；Cobble bed course
It is laid in batch-type elution device lower cone body, is full of the entire cone space of device；The muddy water of batch-type elution device
The side wall of upper cylinder is arranged in mixture discharge port, is higher by 2~5cm of cone bottom surface；
The water treatment system includes reaction tank, inclined-plate clarifying basin, clear water reserviors；Reaction tank, inclined-plate clarifying basin, clear water reserviors material
Matter is steel plate, is equipped with agitating paddle, stirrer paddle pitch of fins reaction tank 20~30cm of bottom in reaction tank；Reaction tank is equipped with overflow
Mouthful, reaction tank overflow port is connected with inclined-plate clarifying basin water inlet, and sedimentation basin is equipped with overflow port, the overflow port and clear water reserviors of sedimentation basin
It is connected；
The feed inlet of plate and frame filter press is connected with mud mixture discharge port, and water outlet is connected with reaction tank；Leacheate goes out
The mouth of a river is connected with reaction tank.
Further, the screen drum mounted angle is 5 °.
Further, the screen drum mesh size 2cm.
Further, 45 ° of the cone inclination angle of inverted cone structure
Further, leacheate water outlet quantity is 6, along cone circumferentially in centrum bottom,
Further, in cobble bed course cobble 0.1~0.5cm of particle size range,
It further, further include connecting the clear water reserviors and the high pressure to meet and discuss the pipeline being connected.
A kind of heavy-metal contaminated soil batch-type elution processing method, includes the following steps:
(1) heavy-metal contaminated soil to be processed after excavation is delivered to screening system feed inlet by belt feeding system；
(2) after heavy-metal contaminated soil enters screen drum, by the inclination and rotation of screen drum, the material on compass screen surface is made to overturn and roll
It is dynamic, it opens simultaneously and is installed on high-pressure nozzle on the inside of dust hood, rinse soil material.Through overturning, rolling and flushing, fine grained soil
Earth falls into collection device together with the water that high-pressure nozzle sprays after screen drum sieves, into batch-type elution device feed inlet；Slightly
Granular soil backfills after the discharge flushing of the discharge gate of screen drum tail portion is up to standard, and flushing waste water enters water treatment system reaction tank.
(3) charging rate and high-pressure nozzle flow of screening system are controlled, regulation enters thin of batch-type elution device
The solid-to-liquid ratio of grain soil and water；After being sent into batch-type elution device, starts stirrer paddle, sufficiently eluted, to heavy metal-polluted
After contaminating object from solid phase to migration of liquid conversion, a leacheate water outlet of batch-type elution device bottom is opened, realizes muddy water point
From wastewater eluting enters water treatment system；A leacheate water outlet is closed, the soil after elution is through batch-type elution device muddy water
After mixture discharge port enters plate and frame filter press realization dehydration, mud cake security landfill, the waste water after separation enters water treatment system.
(4) waste water that the wastewater eluting and plate and frame filter press that step 3 generates extrude initially enters reaction tank, is sufficiently stirred anti-
After answering 15min, enter inclined-plate clarifying basin through overflow hole, after stopping and precipitating 30min, realize the flocculation sedimentation of reaction product, sinks
Clear water enters clear water reserviors through inclined-plate clarifying basin overflow port and keeps in behind shallow lake, is back to batch-type lessivation water.
Compared with prior art, the invention has the following advantages that
(1) high-pressure spraying screening means are used, while effectively realizing heavy-metal contaminated soil high efficiency screening, are accelerated
The leaching of pollutant in soil separates, and realizing reduces the effect of content of beary metal about 10% in pretreatment stage, to shorten elution
Process flow reduces subsequent treatment process pollutional load and has established good basis；
(2) design for passing through cobble bed course, leacheate water outlet and mud mixture discharge port realizes an elution dress
The effect of setting multistage elution, greatly simplifies elution process flow, reduces energy consumption；
(3) by water treatment system, recycling for wastewater eluting is realized, it is real while reducing elution processing cost
Technique Green Sustainable is showed.
It is drenched the beneficial effects of the present invention are: the present invention realizes the multistage of heavy-metal contaminated soil by an elution device
It washes, compared to conventional soil elution device simple process, low energy consumption, high treating effect, has good environmental benefit, economic benefit
And social benefit.
Detailed description of the invention
Fig. 1 is that heavy-metal contaminated soil batch-type elutes processing device structure diagram.
Fig. 2 is the structural schematic diagram of screening system；
Fig. 3 is the structural schematic diagram of batch-type elution device；
Fig. 4 is the structural schematic diagram of water treatment system.
In figure, driving motor 21, discharge port 22, upper dust hood 23, high-pressure nozzle 24, collection device 25, screen drum 26, charging
Mouth 27, rack 28, stirrer paddle 31, leacheate water outlet 32, mud mixture discharge port 33, reaction tank 41, inclined-plate clarifying basin
42, clear water reserviors 43.
Specific embodiment
As shown in Figure 1, a kind of heavy-metal contaminated soil batch-type elutes processing unit, including belt feeding system, screening
System, batch-type elution device, plate and frame filter press, water treatment system.
The screening system includes driving motor 21, speed reducer, screen drum 26, rack 28, upper dust hood 23 and high-pressure nozzle
24；The feed inlet 27 and discharge port 22 of screen drum 26 are separately positioned on the end face of cylinder, and the inclination of screen drum 26 is installed in rack 28,
It is tilted down from the feed inlet 27 of screen drum 26 to discharge port 22；Motor 21 is connected to through speed reducer and screen drum 26 by shaft coupling
Together, driving screen drum 26 is rotatable around its axis, and upper dust hood 23 is installed on 26 top of screen drum, high pressure parallel with 26 axis of screen drum
Spray head 24 is installed on the inside of dust hood 23, and the nozzle of high-pressure nozzle 24 is towards screen drum 26；Collection dress is provided with below screen drum 26
Set 25.Belt feeding system is connected with the feed inlet 27 of screen drum 26.After contaminated soil is from feed inlet 27 into screen drum 26, by sieving
The inclination and rotation of cylinder 26 drive the material overturning on compass screen surface and roll, fine grained soil is made to drop into collection dress through screen drum 26
It sets in 25, coarse-grained soil is discharged through the discharge port 22 of screen drum tail portion, and the coarse granule after discharge can be pressed into mud cake, is added 0.5%
It is kept in after ferrous sulfate stirring.When the overturning of soil material is with rolling in screen drum, high-pressure nozzle rinses soil material, high-pressure nozzle
Flow control 5m3/ h, last water are also flowed into collection device 25, are mixed with fine grained soil.
The batch-type elution device includes shell, stirrer paddle 31 and cobble bed course；The shell material is steel plate,
Shape is upper cylinder, lower part inverted cone structure, 30~45 ° of cone inclination angle.The setting of batch-type elution device feed inlet exists
At the top of batch-type elution device, it is connected with the collection device 25 of screening system；Agitating paddle 31 is mounted in batch-type elution device
Heart position is higher by 10~20cm of cone bottom surface；The setting of leacheate water outlet 32 of batch-type elution device is eluted in batch-type
6 leacheate water outlets 32 are arranged altogether, are evenly distributed in cone bottom, cobble bed course partial size model for device lower part cone base
0.1~0.5cm is enclosed, is laid in batch-type elution device lower cone body, the entire cone space of device is full of；Batch-type leaching
The side wall of upper cylinder is arranged in the mud mixture discharge port 33 of cleaning device, is higher by cone 2~5cm of bottom surface.
The water treatment system includes reaction tank 41, inclined-plate clarifying basin 42, clear water reserviors 43；It is reaction tank, inclined-plate clarifying basin, clear
Pond material is steel plate, is equipped with agitating paddle, stirrer paddle pitch of fins reaction tank bottom 20cm in reaction tank 41.Reaction tank 41 is equipped with
Overflow port, 41 overflow port of reaction tank are connected with 42 water inlet of inclined-plate clarifying basin, and sedimentation basin 42 is equipped with overflow port, and sedimentation basin 42 overflows
Head piece is connected with clear water reserviors 43.Waste water to be processed enters reaction tank 41, and reaction tank 41 is equipped with overflow port, 41 overflow port of reaction tank
It is connected with 42 water inlet of inclined-plate clarifying basin, 41 processed waste water of reaction tank is after inclined-plate clarifying basin 42 precipitates completely again through inclined plate
It is temporary that 42 overflow hole of sedimentation basin flow to clear water reserviors 43.Water in clear water reserviors can be back to batch-type lessivation water.Pass through
One pipeline is to high-pressure nozzle.
The feed inlet of plate and frame filter press is connected with mud mixture discharge port 33, and water outlet is connected with reaction tank；Leacheate
Water outlet 32 is connected with reaction tank.The mud mixture that mud mixture discharge port 33 is discharged first realizes muddy water by plate and frame filter press
After separation, mud cake is temporary, and the waste water after separation enters water treatment system progress together with the waste water that leacheate water outlet 32 is discharged
Processing.
26 mounted angle of screen drum is 45 ° as a preferred technical solution,.The 26 mesh size 2cm of screen drum.
The elution processing method of above-mentioned apparatus is as follows:
(1) heavy-metal contaminated soil to be processed after excavation is delivered to screening system feed inlet by belt feeding system；
(2) after heavy-metal contaminated soil enters screen drum 26, by the inclination and rotation of screen drum 26, overturn the material on compass screen surface
It with rolling (screen drum mesh size 2cm), opens simultaneously and is installed on high-pressure nozzle 24 on the inside of dust hood, rinse soil material.Through
Overturning is rolled and is rinsed, and fine grained soil falls into collection device 25 together with the water that high-pressure nozzle 24 sprays after screen drum sieves,
Into batch-type elution device feed inlet；Coarse-grained soil backfills after the discharge flushing of the discharge gate 22 of screen drum tail portion is up to standard, rushes
It washes waste water and enters water treatment system reaction tank.
(3) 24 flow of charging rate and high-pressure nozzle for controlling screening system, so that into the thin of batch-type elution device
The solid-to-liquid ratio 1:10 of granular soil and water；After being sent into batch-type elution device, start stirrer paddle 31, sufficiently elution 30min,
After heavy metal contaminants are from solid phase to migration of liquid conversion, 6 leacheate water outlets of batch-type elution device bottom are opened
32, realize mud-water separation, wastewater eluting enters water treatment system；6 leacheate water outlets 32 are closed, the soil after elution is through sequence
After batch elution device mud mixture discharge port 33 enters plate and frame filter press realization dehydration, mud cake security landfill, after separation
Waste water enters water treatment system.As a preferred option, the soil in batch-type elution device can by continue add leacheate,
Repeatedly elution is realized under the conditions of solid-to-liquid ratio 1:10, elution time 30min,
(4) waste water that the wastewater eluting and plate and frame filter press that step 3 generates extrude initially enters reaction tank 41, is sufficiently stirred
After reacting 15min, enter inclined-plate clarifying basin 42 through overflow hole, after stopping and precipitating 30min, realizes that the flocculation of reaction product is heavy
It forms sediment, clear water enters clear water reserviors 43 through inclined-plate clarifying basin overflow port and keeps in after precipitating, is back to batch-type lessivation water.
The treating capacity of heavy-metal contaminated soil batch-type elution processing unit is 2t/h, and the single elution time is
30min, occupied area are 30m × 20m.Before treatment, the total chromium concn of heavy-metal contaminated soil is 1232 mg/kg, and Cr (VI) is dense
Degree is 960mg/kg.After batch-type elution processing, total chromium content in soil concentration is 300 mg/kg, and Cr (VI) concentration is 25mg/
kg。
Schematically the invention and embodiments thereof are described above, description is not limiting, attached drawing
Shown in be also one of embodiments of the present invention, actual structure is not limited to this.So if this field it is general
Logical technical staff is enlightened by it, in the case where not departing from this creation objective, is not inventively designed and the technical solution
Similar frame mode and embodiment should belong to the protection scope of this patent.
Claims (8)
1. a kind of heavy-metal contaminated soil batch-type elutes processing unit, which is characterized in that including belt feeding system, screening system
System, batch-type elution device, plate and frame filter press, water treatment system；
The screening system includes driving motor (21), speed reducer, screen drum (26), rack (28), upper dust hood (23) and high pressure
Spray head (24)；The feed inlet (27) and discharge port (22) of screen drum (26) are separately positioned on the end face of cylinder, screen drum (26) inclination
It is installed on rack (28), is tilted down from the feed inlet (27) of screen drum (26) to discharge port (22)；Motor (21) is through slowing down
Machine is linked together with screen drum (26) by shaft coupling, and upper dust hood (23) is installed on above screen drum (26), with screen drum (26) axis
Line is parallel, and high-pressure nozzle (24) is installed on the inside of dust hood (23), and the nozzle of high-pressure nozzle (24) is towards screen drum (26)；Screen drum
(26) lower section is provided with collection device (25)；Belt feeding system is connected with the feed inlet (27) of screen drum (26)；
The batch-type elution device includes shell, stirrer paddle (31) and cobble bed course；The shell material is steel plate, shape
Shape is upper cylinder, lower part inverted cone structure；Batch-type elution device feed inlet is arranged at the top of batch-type elution device,
It is connected with the collection device (25) of screening system；Agitating paddle (31) is mounted on batch-type elution device center, is higher by circular cone
10~20cm of body bottom surface；The leacheate water outlet (32) of batch-type elution device is arranged at batch-type elution device lower part cone bottom
Portion；Cobble bed course is laid in batch-type elution device lower cone body, is full of the entire cone space of device；Batch-type elution
The side wall of upper cylinder is arranged in the mud mixture discharge port (33) of device, is higher by 2~5cm of cone bottom surface；
The water treatment system includes reaction tank (41), inclined-plate clarifying basin (42), clear water reserviors (43)；Reaction tank, inclined-plate clarifying basin,
Clear water reserviors material is steel plate, is equipped with agitating paddle, stirrer paddle pitch of fins reaction tank 20~30cm of bottom in reaction tank (41)；Reaction
Pond (41) is equipped with overflow port, and reaction tank (41) overflow port is connected with inclined-plate clarifying basin (42) water inlet, and sedimentation basin (42), which is equipped with, to overflow
The overflow port of head piece, sedimentation basin (42) is connected with clear water reserviors (43)；
The feed inlet of plate and frame filter press is connected with mud mixture discharge port (33), and water outlet is connected with reaction tank (41)；Elution
Liquid water outlet (32) is connected with reaction tank.
2. the apparatus according to claim 1, which is characterized in that screen drum (26) mounted angle is 5 °.
3. the apparatus according to claim 1, which is characterized in that screen drum (26) the mesh size 2cm.
4. the apparatus according to claim 1, which is characterized in that 45 ° of the cone inclination angle of inverted cone structure
5. the apparatus according to claim 1, which is characterized in that leacheate water outlet (32) quantity is 6, along cone week
To being arranged in centrum bottom,
6. the apparatus according to claim 1, which is characterized in that 0.1~0.5cm of particle size range of cobble in cobble bed course,
7. the apparatus according to claim 1, which is characterized in that further include connecting the clear water reserviors (43) and the high pressure touch
The connected pipeline of head.
8. a kind of heavy-metal contaminated soil batch-type elutes processing method, which comprises the steps of:
(1) heavy-metal contaminated soil to be processed after excavation is delivered to screening system feed inlet by belt feeding system；
(2) after heavy-metal contaminated soil enters screen drum (26), by the inclination and rotation of screen drum (26), overturn the material on compass screen surface
With rolling, opens simultaneously and be installed on high-pressure nozzle (24) on the inside of dust hood, rinse soil material.Through overturning, rolling and flushing,
Fine grained soil falls into collection device (25) together with the water that high-pressure nozzle (24) spray after screen drum sieves, and drenches into batch-type
Cleaning device feed inlet；Coarse-grained soil backfills after the discharge flushing of the discharge gate (22) of screen drum tail portion is up to standard, and flushing waste water enters
Water treatment system reaction tank.
(3) charging rate and high-pressure nozzle (24) flow of screening system are controlled, regulation enters thin of batch-type elution device
The solid-to-liquid ratio of grain soil and water；After being sent into batch-type elution device, start stirrer paddle (31), sufficiently eluted, to a huge sum of money
After belonging to pollutant from solid phase to migration of liquid conversion, (6) a leacheate water outlet (32) of batch-type elution device bottom is opened,
Realize mud-water separation, wastewater eluting enters water treatment system；(6) a leacheate water outlet (32) is closed, the soil warp after elution
After batch-type elution device mud mixture discharge port (33) enters plate and frame filter press realization dehydration, mud cake security landfill, separation
Waste water afterwards enters water treatment system.
(4) waste water that the wastewater eluting and plate and frame filter press that step 3 generates extrude initially enters reaction tank (41), is sufficiently stirred anti-
After answering 15min, enter inclined-plate clarifying basin (42) through overflow hole, after stopping and precipitating 30min, realizes that the flocculation of reaction product is heavy
It forms sediment, clear water enters clear water reserviors (43) through inclined-plate clarifying basin overflow port and keeps in after precipitating, is back to batch-type lessivation water.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111659722A (en) * | 2020-06-16 | 2020-09-15 | 中国地质环境监测院 | Energy-concerving and environment-protective soil pollution treatment device |
| CN111781329A (en) * | 2020-05-25 | 2020-10-16 | 清华大学 | Rapid screening device and method for soil leaching restoration applicability |
| CN113617817A (en) * | 2021-07-09 | 2021-11-09 | 苏州市宏宇环境科技股份有限公司 | Equipment and method for treating tail soil sludge leached from heavy metal contaminated soil |
| CN113732034A (en) * | 2021-09-09 | 2021-12-03 | 上海环境保护有限公司 | Heavy metal contaminated soil device is handled in drip washing of increasing benefit |
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| CN111781329A (en) * | 2020-05-25 | 2020-10-16 | 清华大学 | Rapid screening device and method for soil leaching restoration applicability |
| CN111781329B (en) * | 2020-05-25 | 2024-04-12 | 清华大学 | Device and method for rapidly screening soil leaching restoration applicability |
| CN111659722A (en) * | 2020-06-16 | 2020-09-15 | 中国地质环境监测院 | Energy-concerving and environment-protective soil pollution treatment device |
| CN111659722B (en) * | 2020-06-16 | 2022-01-28 | 中国地质环境监测院 | Energy-concerving and environment-protective soil pollution treatment device |
| CN113617817A (en) * | 2021-07-09 | 2021-11-09 | 苏州市宏宇环境科技股份有限公司 | Equipment and method for treating tail soil sludge leached from heavy metal contaminated soil |
| CN113617817B (en) * | 2021-07-09 | 2022-07-12 | 苏州市宏宇环境科技股份有限公司 | Equipment and method for treating tail soil sludge leached from heavy metal contaminated soil |
| CN113732034A (en) * | 2021-09-09 | 2021-12-03 | 上海环境保护有限公司 | Heavy metal contaminated soil device is handled in drip washing of increasing benefit |
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