CN106077060A - A kind of heavy-metal contaminated soil processing means and process technique thereof - Google Patents
A kind of heavy-metal contaminated soil processing means and process technique thereof Download PDFInfo
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- CN106077060A CN106077060A CN201610106879.7A CN201610106879A CN106077060A CN 106077060 A CN106077060 A CN 106077060A CN 201610106879 A CN201610106879 A CN 201610106879A CN 106077060 A CN106077060 A CN 106077060A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/02—Extraction using liquids, e.g. washing, leaching, flotation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
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Abstract
The present invention relates to a kind of heavy-metal contaminated soil processing means, including frame, feed hopper, pulverizing rolling, ball mill, bolter, one-stage water wash pond, linear vibrating screen, mud Buffer Pool, Pulp pump, centrifuge, degree of depth drip washing pond, belt filter press, two grades of washing pools, polluted soil carries out repair process through mechanical lapping, one-stage water wash, one-level solid-liquid separation, degree of depth drip washing, two grades of washings, two grades of solid-liquid separation.Present invention process advanced person, high treating effect, work efficiency height, automaticity height.
Description
Technical field
The present invention relates to field of environment protection equipment, be specifically related to a kind of can effectively carry out processing by heavy metal contaminated soil
Heavy-metal contaminated soil processing means and process technique thereof.
Background technology
Heavy metal pollution in soil is mainly derived from industrial and mineral and chemical enterprise generation waste residue, waste water and waste gas are unprocessed
Discharge, pollution factor mainly has lead, arsenic, cadmium, zinc, hydrargyrum, copper etc., and heavy metal pollution of soil not only affects the quality of agricultural product,
And affect air and quality of water environment.Meanwhile, serious soil pollution has become as restriction, and soil, urban area is sustainable opens
Send out the principal element utilized.
Soil leaching is a kind of physics and chemical remediation technology, is to utilize eluent shower soil, be allowed to heavy metal from
Son forms more stable complex.Because heavy metal pollution process quantities is big, broad covered area, and eluent proportioning is expensive,
Individually drip washing necessarily causes operating cost high, and drip washing weak effect, easily causes secondary pollution, is easily caused underground water pollution.
Different drip washing conditions are different to the degree of repairing polluted soil with drip washing mode, mainly by edaphic condition, pollutant
The factor impacts such as type, eluent kind and the method for operation.Owing to geologic structure is different with soil fertility, heavy metal-polluted soil is distributed
In being randomly distributed, select suitable technology the most effectively to reduce heavy metal content in soil, also reduce energy resource consumption particularly significant.
The soil of this heavy metal pollution is the most effectively and rapidly carried out repair process, is the current difficulty be badly in need of and solving
Topic.Existing heavy-metal contaminated soil repair process, all uses simple technique and equipment simply to process, there is place's science and engineering
The shortcomings such as skill is backward, treatment effeciency is low, weak effect, occupation area of equipment are big, automaticity is low.
Summary of the invention
The invention aims to overcome the deficiencies in the prior art, it is provided that a kind of technique advanced person, high treating effect, work
Efficiency is high, automaticity is high novel heavy metal contaminated soil processing means and process technique.
The present invention is achieved by the following technical programs:
A kind of heavy-metal contaminated soil processing means, including frame, feed hopper, pulverizing rolling, ball mill, bolter, one-stage water wash
Pond, linear vibrating screen, mud Buffer Pool, Pulp pump, centrifuge, degree of depth drip washing pond, two grades of washing pools, described upper rack is provided with
Feed hopper, is provided with a pair pulverizing rolling below described feed hopper, the described pulverizing side of rolling down is provided with ball mill, sets bottom described ball mill
Have bolter, below described bolter, be provided with one-stage water wash pond, below described one-stage water wash pond, be provided with linear vibrating screen, described directly
Being provided with mud Buffer Pool below linearly coupled sieve, described mud Buffer Pool is connected with centrifuge by pipeline, Pulp pump, described centrifugal
Being provided with degree of depth drip washing pond below machine, described degree of depth drip washing pond is connected with two grades of washing pools of lower section by hydraulic vortex flow devices.
The process technique of above-mentioned heavy-metal contaminated soil processing means, comprises the following steps:
S1, the classification of soils: carry out three-dimensional values to polluting section soil, be divided into serious pollution soil, slight by pollution level
Contaminated soil and uncontaminated soil, and stock pile stacked, serious pollution soil and slight pollution soil enter crushing and screening, uncontaminated
Soil directly backfills.
S2, mechanical lapping: the most tentatively crush contaminated soil and sieve, after crushing and sieve, soil is put into wet
Carrying out mechanical lapping, time 30-40min in formula ball mill, then discharging is sieved, and sieve upper part enters soil stockyard, lower part of screen
Dividing serious pollution soil to carry out one-stage water wash into continuous stirring pond, slight pollution soil does not suffers from one-stage water wash, is directly entered
Degree of depth drip washing pond.
S3, one-stage water wash: step S2 screening after treat drip washing serious pollution soil enter one-stage water wash pond, by solid-to-liquid ratio 1:
2-1:4 adds clear water, starts agitator, makes Tu Shui be sufficiently mixed, and Soil structure disperses, soil or rock debris surface heavy metal
Under the effect of water, desorption enters water body, opens drip washing pond bottom gate after drip washing 10-20min, and mud enters straight-line oscillation
Sieve, on sieve, greater particle size rock and rock debris rinse through giant again, and after flushing, soil places one-level screening soil stacking
District, after flushing mud enter below mud Buffer Pool, complete one-stage water wash.
S4, one-level solid-liquid separation: mud is promoted to automatic discharge centrifuge by Pulp pump, high speed centrifuge be dehydrated, produce
Raw waste liquid enters sewage Buffer Pool.
S5, degree of depth drip washing: after dehydration, degree of depth drip washing pond delivered to by soil and the communicated band of slight pollution soil, add HSJ-γ
Chemical leaching, starts agitator, is fully mixed with eluent by soil, and reaction opens stirring pool bottom valve, mud after terminating
Slurry enters hydraulic vortex flow devices under gravity.
S6, two grades of washings: the hydraulic vortex flow devices debugged filters out particle diameter and is more than 0.075mm soil, enters two grades of washings
Pond, adds clear water, is sufficiently stirred for, carries out two grades of washings；Enter flocculation sedimentation tank less than 0.075mm part with waste water, enter
Row eluent recycles and clear water reuse.
S7, two grades of solid-liquid separation: the mud after step S6 bis-grades is washed carries out solid-liquid separation again, liquid phase enters sewage and delays
Rushing pond, solid phase enters soil stockyard and carries out safe disposal.
According to embodiments of the invention, it is also possible to the present invention is further optimized, below for the skill formed after optimizing
Art scheme:
Contaminated soil is classified by step S1 by heavy metal pollution degree: the heavy metal contaminants detected includes: Pb, Zn,
Cd, Hg, Cu and metalloid As；Serious pollution soil is designed as above-mentioned any one heavy metal pollution substrate concentration of six kinds of metals and exceedes ring
The soil that border standard limited value is more than 5 times；Slight pollution soil is that any concentration is at environmental standard limit value and environmental standard limit value 5 times
Between soil.
Eluent HSJ-γ chemical leaching used by the degree of depth drip washing of step S5 is compound eluent, including synergist and complexation
Agent, synergist is potassium peroxydisulfate, hydrogen peroxide and ClO2In at least one, chelating agent is in EDTA, thiourea and ethylene thiourea
At least one.
Preferably, synergist used in step S5 was stream acid potassium, and its consumption with the mass ratio of two-step washing soil is
1:100～200；Chelating agent is EDTA and ethylene thiourea two kinds, and its consumption is 1:1:50 with the mass ratio of two-step washing soil
～100.
It is highly preferred that the synergist used by degree of depth drip washing and chelating agent described in step S5 successively add；Synergist adds
Adding chelating agent after entering stirring reaction 10min, after addition chelating agent, the response time is 10-15min.
Preferably, the total solid-liquid of step S4 degree of depth drip washing is 1:3-1:5；The addition of clear water and pouring in step S6 bis-grades washing
The mass ratio washing soil is 1:1-2:1.
For solving the technical problem to be solved, to the ring waste in sewage Buffer Pool and flocculation sedimentation tank,
Heavy metal recovery medicament processes, and carries out solid-liquid separation after being disposed, and the clear liquid that sewage Buffer Pool obtains can be back to S3
One-stage water wash, the filtrate that flocculation sedimentation tank obtains can be back to S5 again as degree of depth eluent, and filtering residue carries out follow-up money
Source is reclaimed or carries out useless landfill of endangering.
Compared with prior art, the invention has the beneficial effects as follows: elution device volume compact, floor space are little, automatization
Degree is high, and the efficiency of repair process and effect, far above existing apparatus, decrease equipment investment, reduce soil remediation cost,
Alleviate labor intensity.It addition, the present invention uses first pulverizes ball milling, two grades of washings, two grades of solid-liquid separation, again plus depth drip washing
Advanced technologies, remediation efficiency is high, effective.The present invention, according to the pollution level of soil, carries out classification process to soil, both saved
Reagent cost and operating cost, decrease the amount of solution ratio needed for the generation of waste liquid amount, whole technique the most to a certain extent
Tradition slurrying drip washing is low, is reduced to about 1:6 from the solid-to-liquid ratio of tradition 1:8～1:10, reduces the leacheate of 20% 30%
Total amount.In the present invention, whole set process sewerage disposing Posterior circle uses, and the waste liquid that two-step washing produces processes through chemical precipitation
After, can be using reuse as two-step washing liquid, reuse efficiency is up to about 60%, thus saves a part of reagent cost, and keeps away
Exempt from environment to external world and cause secondary pollution.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the process chart of the present invention.
In accompanying drawing: 1 feed hopper, 2 pulverize rolling, 3 ball mill, 4 bolters, 5 one-stage water wash ponds, 6 straight lines
Vibrosieve, 7 mud Buffer Pools, 8 frames, 9 pipelines, 10 Pulp pump, 11 centrifuges, 12 clear water pipes, 13 stir
Mix device, 14 degree of depth drip washing ponds, 15 hydraulic vortex flow devices, 16 2 grades of washing pools.
Detailed description of the invention
Below in conjunction with the accompanying drawings and instantiation, the present invention is further elaborated.
As it is shown in figure 1, a kind of heavy-metal contaminated soil processing means, including frame 8, feed hopper 1, pulverize rolling 2, ball mill
3, bolter 4, one-stage water wash pond 5, linear vibrating screen 6, mud Buffer Pool 7, Pulp pump 10, centrifuge 11, degree of depth drip washing pond 14,
Two grades of washing pools 16.Frame 8 top is provided with feed hopper 1, is provided with a pair pulverizing rolling 2, described pulverizing rolling 2 below described feed hopper 1
Lower section is provided with ball mill 3.It is provided with bolter 4 bottom ball mill 3, below described bolter 4, is provided with one-stage water wash pond 5, described one
Being provided with linear vibrating screen 6 below level washing pool 5, be provided with mud Buffer Pool 7 below described linear vibrating screen 6, described mud buffers
Pond 7 is connected with centrifuge 11 by pipeline 9, Pulp pump 10, is provided with degree of depth drip washing pond 14, the described degree of depth below described centrifuge 11
Drip washing pond 14 is connected with two grades of washing pools 16 of belt filter press and lower section by hydraulic vortex flow devices 15.
Embodiment 1
As in figure 2 it is shown, the process technique of above-mentioned heavy-metal contaminated soil processing means, comprise the following steps:
(1) classification of soils: certain lead contamination place soil is carried out three-dimensional values, is divided into serious pollution soil by pollution level
(Pd puts down for (Pd mean concentration is 3.182mg/g), slight pollution soil (Pd mean concentration is 1.563mg/g) and uncontaminated soil
All concentration is 0.391mg/g), and stock pile stacked, serious pollution soil and slight pollution soil entrance crushing and screening, uncontaiminated soil
Earth directly backfills.
(2) mechanical lapping: tentatively crush polluted soil and sieve, will crush and after screening, soil passes through charging
Bucket 1 is put into and is carried out mechanical lapping 30min in wet ball mill 3, and then 2mm sieve is crossed in discharging, and sieve upper part enters soil stockyard, sieve
Lower part is entered continuous stirring pond and is carried out one-stage water wash.
(3) one-stage water wash: the serious pollution soil after the screening of step S2 enters one-stage water wash pond 5, and one-stage water wash pond 5 is designed
Capacity is 25m.2.5m is added by conveyer belt3Contaminated soil after screening, is added clear water by solid-to-liquid ratio 1:3 by clear water pipe 12
20m3, water inlet arranges automatic controller, is automatically stopped work after arriving designated water level；High-power stirring it is provided with in one-stage water wash pond 5
Mixing device 13, start high speed stirrer motor and drive agitator 13 to make Tu Shui be sufficiently mixed, Soil structure disperses, soil or rock debris
Heavy metal desorption under the effect of water in surface enters water body；Opening drip washing pond bottom gate after drip washing 15min, mud enters straight
Linearly coupled sieve 6(sieve aperture particle diameter 2mm), on sieve, greater particle size rock and rock debris rinse through giant again, soil after flushing
Place one-level screening soil laydown area, the mud Buffer Pool 7 below mud entrance after flushing, complete one-stage water wash.
(4) one-level solid-liquid separation: after one-stage water wash, cleaning soil is transferred to soil stockyard from sieve, siftage enters mud
Buffer Pool 7；Mud is promoted to automatic discharge centrifuge 11 by Pulp pump 10, high speed centrifuge 11 be dehydrated.
(5) degree of depth drip washing: after dehydration, degree of depth drip washing pond 14 delivered to by the communicated band of soil；By dosing pump 1:150 in mass ratio
First in pond, add potassium peroxydisulfate 36kg.It is provided with high-power agitator 13 in degree of depth drip washing pond 14, starts high speed stirrer motor band
Soil is fully mixed by dynamic agitator 13 with synergist；After reaction 10min, then add in pond by 1:1:200 in mass ratio
EDTA 27.5kg and ethylene thiourea 27.5 kg, opens stirring pool bottom valve after reaction 10min, and mud enters under gravity
Enter hydraulic vortex flow devices 15.
(6) two grades of washings: the hydraulic vortex flow devices 15 debugged filters out particle diameter and is more than 0.075mm soil, enters two grades of water
Wash pool 16, is added clear water 7.0m by solid-to-liquid ratio 1:1.5 by clear water pipe 123.High-power agitator 13 it is provided with in two grades of washing pools 16,
Start high speed stirrer motor and drive agitator 13, carry out two grades of washings；Flocculation is entered with waste water heavy less than 0.075mm part
Pond, shallow lake, carries out eluent and recycles and clear water reuse.
(7) two grades of solid-liquid separation: solid-liquid separation again after two grades of washings, liquid phase enters sewage Buffer Pool, through chemical precipitation
Rear clear liquid circulating and recovering, solid phase enters security landfill (repairing effect is shown in Table 1) after the detection of soil stockyard.
Embodiment 2
(1) classification of soils: certain lead contamination place soil is carried out three-dimensional values, is divided into serious pollution soil by pollution level
(Pd puts down for (Pd mean concentration is 3.182mg/g), slight pollution soil (Pd mean concentration is 1.563mg/g) and uncontaminated soil
All concentration is 0.391mg/g), and stock pile stacked, serious pollution soil and slight pollution soil entrance crushing and screening, uncontaiminated soil
Earth directly backfills.
(2) mechanical lapping: tentatively crush polluted soil and sieve, will crush and after screening, soil passes through charging
Bucket 1 is put into and is carried out mechanical lapping 30min in wet ball mill 3, and then 2mm sieve is crossed in discharging, and sieve upper part enters soil stockyard, sieve
Lower part is entered continuous stirring pond and is carried out one-stage water wash.
(3) one-stage water wash: the serious pollution soil after the screening of step S2 enters one-stage water wash pond 5, and one-stage water wash pond 5 is designed
Capacity is 25m.2.0m is added by conveyer belt3Contaminated soil after screening, by solid-to-liquid ratio 1:4 by clarified water pump from circulating water pool
Draw water addition clear water 21.5m3, water inlet arranges automatic controller, is automatically stopped work after arriving designated water level；Heavy-duty motor stirs
Opening drip washing pond bottom gate after mixing drip washing 20min, mud enters linear vibrating screen 6(sieve aperture particle diameter 2mm), greater particle size on sieve
Rock and rock debris rinse through giant again, and after flushing, soil places one-level screening soil laydown area, the mud after flushing
Mud Buffer Pool 7 below entrance, completes one-stage water wash.
(4) one-level solid-liquid separation: after one-stage water wash, cleaning soil is transferred to soil stockyard from sieve, siftage enters mud
Buffer Pool 7；Mud is promoted to automatic discharge centrifuge 11 by Pulp pump 10, high speed centrifuge 11 be dehydrated.
(5) degree of depth drip washing: after dehydration, degree of depth drip washing pond 14 delivered to by the communicated band of soil；By dosing pump 1:100 in mass ratio
First adding 30% hydrogen peroxide 40L in pond, soil is fully mixed by Large-power High-Speed driven by motor agitator 13 with synergist；Instead
After answering 10min, then in pond, add EDTA 57kg and ethylene thiourea 57kg as chelating agent, reaction by 1:1:75 in mass ratio
Opening stirring pool bottom valve after 10min, mud enters hydraulic vortex flow devices 15 under gravity.
(6) two grades of washings: the hydraulic vortex flow devices 15 debugged filters out particle diameter and is more than 0.075mm soil, enters two grades of water
Wash pool 16, adds clear water 7.5m by solid-to-liquid ratio 1:23, it is sufficiently stirred for, carries out two grades of washings；Less than 0.075mm part with waste water one
Rise and enter flocculation sedimentation tank, carry out eluent and recycle and clear water reuse.
(7) two grades of solid-liquid separation: solid-liquid separation again after two grades of washings, liquid phase enters sewage Buffer Pool, through chemical precipitation
Rear clear liquid circulating and recovering, solid phase enters security landfill (repairing effect is shown in Table 1) after the detection of soil stockyard.
Embodiment 3
(1) classification of soils: certain lead contamination place soil is carried out three-dimensional values, is divided into serious pollution soil by pollution level
(Pd puts down for (Pd mean concentration is 3.182mg/g), slight pollution soil (Pd mean concentration is 1.563mg/g) and uncontaminated soil
All concentration is 0.391mg/g), and stock pile stacked, serious pollution soil and slight pollution soil entrance crushing and screening, uncontaiminated soil
Earth directly backfills.
(2) mechanical lapping: tentatively crush polluted soil and sieve, will crush and after screening, soil passes through charging
Bucket 1 is put into and is carried out mechanical lapping 30min in wet ball mill 3, and then 2mm sieve is crossed in discharging, and sieve upper part enters soil stockyard, sieve
Lower part is entered continuous stirring pond and is carried out one-stage water wash.
(3) one-stage water wash: the serious pollution soil after the screening of step S2 enters one-stage water wash pond 5, and one-stage water wash pond 5 is designed
Capacity is 25m.2.0m is added by conveyer belt3Contaminated soil after screening, by solid-to-liquid ratio 1:3.5 by clarified water pump from recirculated water
Draw water addition clear water 19m in pond3, water inlet arranges automatic controller, is automatically stopped work after arriving designated water level；Heavy-duty motor stirs
Opening drip washing pond bottom gate after mixing drip washing 20min, mud enters linear vibrating screen 6(sieve aperture particle diameter 2mm), greater particle size on sieve
Rock and rock debris rinse through giant again, and after flushing, soil places one-level screening soil laydown area, the mud after flushing
Mud Buffer Pool 7 below entrance, completes one-stage water wash.
(4) one-level solid-liquid separation: after one-stage water wash, cleaning soil is transferred to soil stockyard from sieve, siftage enters mud
Buffer Pool 7；Mud is promoted to automatic discharge centrifuge 11 by Pulp pump 10, high speed centrifuge 11 be dehydrated.
(5) degree of depth drip washing: after dehydration, degree of depth drip washing pond 14 delivered to by the communicated band of soil；By dosing pump 1:200 in mass ratio
First adding potassium peroxydisulfate 22kg in pond, soil is fully mixed by Large-power High-Speed driven by motor agitator 13 with synergist；Instead
After answering 15min, then in pond, add EDTA 86kg and ethylene thiourea 103 kg, after reaction 15min by 1:1.2:50 in mass ratio
Opening stirring pool bottom valve, mud enters hydraulic vortex flow devices 15 under gravity.
(6) two grades of washings: the hydraulic vortex flow devices 15 debugged filters out particle diameter and is more than 0.075mm soil, enters two grades of water
Wash pool 16, adds clear water 3.5m by solid-to-liquid ratio 1:13, it is sufficiently stirred for, carries out two grades of washings；Less than 0.075mm part with waste water one
Rise and enter flocculation sedimentation tank, carry out eluent and recycle and clear water reuse.
(7) two grades of solid-liquid separation: solid-liquid separation again after two grades of washings, liquid phase enters sewage Buffer Pool, through chemical precipitation
Rear clear liquid circulating and recovering, solid phase enters security landfill (repairing effect is shown in Table 1) after the detection of soil stockyard.
The soil remediation effect of the present invention is as shown in the table:
Table 1. various embodiments of the present invention soil remediation effect
Table 2. surface water and sewage drainage standard (Pb)
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-described embodiment,
All technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that, for the art
For those of ordinary skill, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.Each ingredient the clearest and the most definite in the present embodiment all can use prior art to be realized.
Claims (8)
1. a heavy-metal contaminated soil processing means, it is characterised in that: it include frame, feed hopper, pulverizing rolling, ball mill,
Bolter, one-stage water wash pond, linear vibrating screen, mud Buffer Pool, Pulp pump, centrifuge, degree of depth drip washing pond, two grades of washing pools,
Described upper rack is provided with feed hopper, is provided with a pair pulverizing rolling below described feed hopper, and the described pulverizing side of rolling down is provided with ball mill,
It is provided with bolter bottom described ball mill, is provided with one-stage water wash pond below described bolter, is provided with below described one-stage water wash pond
Linear vibrating screen, is provided with mud Buffer Pool below described linear vibrating screen, described mud Buffer Pool by pipeline, Pulp pump with from
Scheming is connected, and is provided with degree of depth drip washing pond below described centrifuge, and described degree of depth drip washing pond is by hydraulic vortex flow devices and the two of lower section
Level washing pool is connected.
The process technique of a kind of heavy-metal contaminated soil processing means the most according to claim 1, it is characterised in that: its bag
Include following steps:
S1, the classification of soils: carry out three-dimensional values to polluting section soil, be divided into serious pollution soil, slight by pollution level
Contaminated soil and uncontaminated soil, and stock pile stacked, serious pollution soil and slight pollution soil enter crushing and screening, uncontaminated
Soil directly backfills；
S2, mechanical lapping: the most tentatively crush contaminated soil and sieve, after crushing and sieve, soil puts into wet type ball
Carrying out mechanical lapping, time 30-40min in grinding machine, then discharging is sieved, and sieve upper part enters soil stockyard, and weight is divided in lower part of screen
Degree contaminated soil carries out one-stage water wash into continuous stirring pond, and slight pollution soil does not suffers from one-stage water wash, is directly entered the degree of depth
Drip washing pond；
S3, one-stage water wash: step S2 screening after treat drip washing serious pollution soil enter one-stage water wash pond, by solid-to-liquid ratio 1:2-1:
4 add clear water, start agitator, make Tu Shui be sufficiently mixed, and Soil structure disperses, and soil or rock debris surface heavy metal are at water
Effect under desorption enter water body, open drip washing pond bottom gate after drip washing 10-20min, mud enters linear vibrating screen, sieve
Upper greater particle size rock and rock debris rinse through giant again, and after flushing, soil places one-level screening soil laydown area, punching
Wash the mud Buffer Pool below the entrance of rear mud, complete one-stage water wash；
S4, one-level solid-liquid separation: mud is promoted to automatic discharge centrifuge by Pulp pump, high speed centrifuge be dehydrated, generation
Waste liquid enters sewage Buffer Pool；
S5, degree of depth drip washing: after dehydration, degree of depth drip washing pond delivered to by soil and the communicated band of slight pollution soil, add HSJ-γ chemistry
Eluent, starts agitator, is fully mixed with eluent by soil, and reaction opens stirring pool bottom valve after terminating, and mud exists
Hydraulic vortex flow devices is entered under action of gravity；
S6, two grades of washings: the hydraulic vortex flow devices debugged filters out particle diameter and is more than 0.075mm soil, enters two grades of washing pools, adds
Enter clear water, be sufficiently stirred for, carry out two grades of washings；Enter flocculation sedimentation tank less than 0.075mm part with waste water, carry out drip washing
Agent recycling and clear water reuse；
S7, two grades of solid-liquid separation: the mud after step S6 bis-grades is washed carries out solid-liquid separation again, liquid phase enters sewage buffering
Pond, solid phase enters soil stockyard and carries out safe disposal.
The process technique of a kind of heavy-metal contaminated soil processing means the most according to claim 2, it is characterised in that step
The heavy metal contaminants that S1 is detected includes: Pb, Zn, Cd, Hg, Cu and metalloid As；Serious pollution soil is designed as above-mentioned six
Kind of any one heavy metal pollution substrate concentration of metal exceedes the soil of environmental standard limit value more than 5 times.
The process technique of a kind of heavy-metal contaminated soil processing means the most according to claim 2, it is characterised in that step
Eluent HSJ-γ chemical leaching used by S5 degree of depth drip washing is compound eluent, and including synergist and chelating agent, synergist is
Potassium peroxydisulfate, hydrogen peroxide and ClO2In at least one, chelating agent is at least one in EDTA, thiourea and ethylene thiourea.
The process technique of a kind of heavy-metal contaminated soil processing means the most according to claim 4, it is characterised in that step
In compound eluent used by S5 degree of depth drip washing, synergist is potassium peroxydisulfate, and its consumption is 1 with the mass ratio of two-step washing soil:
100～200；Chelating agent is EDTA and ethylene thiourea two kinds, the mass ratio of its consumption and two-step washing soil be 1:1:50～
100。
6. according to the process technique of a kind of heavy-metal contaminated soil processing means described in claim 2, it is characterised in that
In step S6, the waste water utilization ring waste in flocculation sedimentation tank is recycled medicament heavy metal is processed, process
After carry out solid-liquid separation, filtrate can return to step S5 again as degree of depth eluent, and filtering residue carries out follow-up resource and returns
Receive or carry out useless landfill of endangering.
The process technique of a kind of heavy-metal contaminated soil processing means the most according to claim 2, it is characterised in that step
Eluent used by S5 degree of depth drip washing is compound eluent, successively adds including synergist and chelating agent, synergist and chelating agent；
Synergist adds chelating agent after adding stirring reaction 10min, and after addition chelating agent, the response time is 10-15min.
The process technique of a kind of heavy-metal contaminated soil processing means the most according to claim 2, it is characterised in that step
The total solid-liquid of S5 degree of depth drip washing is 1:3-1:5；In step S6 bis-grades washing, the addition of clear water is 1 with the mass ratio of washed off soil:
1-2:1。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108326025A (en) * | 2018-03-08 | 2018-07-27 | 浙江绿垚生态环境有限公司 | A kind of cleaning device of quick processing contaminated soil |
| CN109078563A (en) * | 2018-08-03 | 2018-12-25 | 祝定华 | A kind of mixing apparatus of adsorbent for heavy metal and contaminated soil |
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| CN108326025B (en) * | 2018-03-08 | 2020-08-07 | 浙江绿垚生态环境有限公司 | Cleaning device for rapidly treating contaminated soil |
| CN108326025A (en) * | 2018-03-08 | 2018-07-27 | 浙江绿垚生态环境有限公司 | A kind of cleaning device of quick processing contaminated soil |
| CN109078563A (en) * | 2018-08-03 | 2018-12-25 | 祝定华 | A kind of mixing apparatus of adsorbent for heavy metal and contaminated soil |
| CN109100198A (en) * | 2018-11-02 | 2018-12-28 | 江苏新锐环境监测有限公司 | A kind of Soil K+adsorption pretreating device |
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| CN109290351A (en) * | 2018-11-30 | 2019-02-01 | 中机国际环保科技有限公司 | Heavy-metal contaminated soil processing system and technique |
| CN109772867A (en) * | 2019-02-22 | 2019-05-21 | 陆炯 | A kind of soil remediation system and administering method by heavy metal pollution |
| CN109909291A (en) * | 2019-04-03 | 2019-06-21 | 陈泽欣 | A kind of prosthetic device and restorative procedure of cadmium pollution soil |
| CN110479746A (en) * | 2019-07-31 | 2019-11-22 | 招商局生态环保科技有限公司 | A kind of soil remediation and lead recovery process in lead contamination place |
| CN110479746B (en) * | 2019-07-31 | 2021-07-30 | 招商局生态环保科技有限公司 | Soil remediation and lead recovery process for lead-polluted site |
| CN111014264A (en) * | 2019-11-28 | 2020-04-17 | 于瑞祚 | Agricultural soil prosthetic devices |
| CN112122322A (en) * | 2020-09-09 | 2020-12-25 | 季丹萍 | Contaminated soil fertility-increasing and repairing system and treatment process |
| CN112122322B (en) * | 2020-09-09 | 2022-04-19 | 季丹萍 | Contaminated soil fertility-increasing and repairing system and treatment process |
| CN112588807A (en) * | 2020-12-29 | 2021-04-02 | 中国科学院沈阳应用生态研究所 | Method for eluting aged aromatic hydrocarbon component adhered to clay mineral in petroleum-polluted soil |
| CN113083875A (en) * | 2021-05-11 | 2021-07-09 | 江苏索尔雷米环保科技有限公司 | Soil ectopic chemical leaching treatment system |
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