CN108237142A - A kind of method and apparatus of repairing polluted soil - Google Patents
A kind of method and apparatus of repairing polluted soil Download PDFInfo
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- CN108237142A CN108237142A CN201611234000.3A CN201611234000A CN108237142A CN 108237142 A CN108237142 A CN 108237142A CN 201611234000 A CN201611234000 A CN 201611234000A CN 108237142 A CN108237142 A CN 108237142A
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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
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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
- B09C1/06—Reclamation of contaminated soil thermally
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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
- B09C1/06—Reclamation of contaminated soil thermally
- B09C1/065—Reclamation of contaminated soil thermally by pyrolysis
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
- B09C1/105—Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants
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- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
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- General Health & Medical Sciences (AREA)
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- Processing Of Solid Wastes (AREA)
Abstract
A kind of method and apparatus of repairing polluted soil, this method include：Determine the pollution range of contaminated soil region；Soil in determining pollution range is dug out and carries out destructive distillation processing；Sections bottom soil layer surface after contaminated soil is dug out one partition protective layer is made using charcoal sorbing material；The soil repaired after destructive distillation is handled is backfilling into the region dug out contaminated soil and built partition protective layer with charcoal sorbing material in bottom, and charcoal is added into the soil that upper strata backfills；It backfills by repairing and is added to the grown on soil plant of charcoal to carry out green reparation.The soil restoring device and method of the present invention can be to contaminated soil harmlessness disposing, floor space is small, high degree of automation, energy original place is administered, remaining pollutant in deep soil can be avoided to be polluted again to soil with the rising of underground water, it can avoid causing secondary pollution to administering region surrounding air and environment in processing procedure, it can be by heavy metal vitrifying, the curing in contaminated soil.
Description
Technical field
The invention belongs to environmental protection technical fields, more particularly to the reparation of contaminated soil, relate more specifically to one kind
The repairing polluted soil method of destructive distillation+charcoal sorbing material+charcoal combination.
The invention further relates to the devices for being used to implement the above method.
Background technology
Since industry is grown rapidly, solid waste is constantly stacked and is toppled over to soil surface, and harmful waste water is constantly to soil
Middle infiltration, pernicious gas and floating dust in air also constantly with rainwater landing in the soil, result in soil and be contaminated, not only hamper
The normal function of soil is hindered, has reduced crop yield and quality, also influencing human body indirectly by grain, veterinary antibiotics etc. is good for
Health.And all these substances to soil, harmful, all it is called soil pollutant.
Soil pollutant is broadly divided into two major class of inorganic pollution and organic pollution.Inorganic pollution mainly includes
Acid, alkali, heavy metal, salt, radioactive element caesium, strontium compound, containing arsenic, selenium, fluorine compound etc..Organic pollution is main
Including organic agricultural chemicals, phenols, cyanide, oil, synthetic detergent, 3,4- BaPs and by municipal sewage, sludge and barnyard manure
Harmful microorganism brought etc..It is excessive when containing hazardous substance in soil, more than the self-purification capacity of soil, the group of soil will be caused
It changes into, structure and function, microbial activities is suppressed, and harmful substance or its decomposition product gradually accumulate in the soil
It is absorbed by the body indirectly by " soil → plant → human body " or by " soil → water → human body ", reaches and be detrimental to health
Degree, be exactly soil pollution.
Chinese Ministry of Environmental Protection has carried out the investigation for lasting 8 years from April, 2005 in December, 2013.Environmental Protection Department and land resources
Portion's joint publication《National Soil Pollution Investigation bulletin》, investigation result shows that some areas soil pollution is heavier, arable land soil
Earth environmental quality causes anxiety, and industry and mining discard ground soil environment outstanding problem.The total point position exceeding standard rate of national soil is 16.1%, south
It is more prominent that square soil pollution overweights the subregions such as the north, the Yangtze River Delta, Pearl River Delta, Northeastern rust belt soil contamination problem
Go out, southwest, variable charge soil heavy metals exceeding standard range are larger.
In 690 polluted enterprises lands used of investigation and Soil Surrounding point position, super punctuation bit accounts for 36.3%, relates generally to
Ferrous metal, non-ferrous metal, leather and fur products, papermaking, oil coal, chemical and medicine industry, chemical fibre rubber and plastic, mineral article, metal product,
The industries such as electric power.Super punctuation bit accounts for 34.9% in the Industrial Wasteland of investigation, and super punctuation bit accounts for 29.4% in industrial park.It is adjusting
At 188 looked into municipal solid wastes disposal place, super punctuation bit accounts for 21.3%, based on inorganic pollution, waste incineration and fills out
It is serious to bury an organic contamination.Super punctuation bit accounts for 23.6% in the oil-producing region of investigation, and super punctuation bit accounts for 33.4% in mining area, 55 dirts
There are 39 in water irrigation district there are soil pollution, super punctuation bit accounts in 1578 soil point positions of 267 arterial highway both sides
20.3%.In addition, heavy metal cadmium aggravates, national soil cadmium content amplification is at most more than 50%.According to investigations the results show that
The super punctuation bit of inorganic matter based on this 8 heavy metal species of cadmium, mercury, arsenic, copper, lead, chromium, zinc, nickel accounts for whole super punctuation bits
82.8%, wherein accounting for major part again with cadmium pollution, reach 7%.The content of cadmium generally increases in China, in southwest and
Coastal area amplification is more than 50%, increases by 10%~40% in North China, northeast and west area.
At present, there are many technology of repairing polluted soil, all with certain improved effect, but also all have certain limitation
Property, the application of single method is often inefficient, it is difficult to reach target, can not solve the contaminated land reparation in current China
Problem.
There can be a kind of complex technique that the repairing polluted soil to be formed is combined using kinds of processes, have a wide range of application, both
Can in-situ immobilization also strange land repair, do not generate secondary pollution, system efficiently solves contaminated soil remediation and recontamination problem,
Realize innoxious, the stabilisation of contaminated soil remediationBy careful retrieval, such technology has not been reported and industry at present
Research worker's problem that there is an urgent need to capture.
Invention content
In view of this, it is an object of the present invention to provide a kind of methods of repairing polluted soil.
Another object of the present invention is to provide a kind of device for being used to implement the above method.
To achieve these goals, as one aspect of the present invention, the present invention provides a kind of repairing polluted soils
Method, which is characterized in that include the following steps：
Step S1 determines the pollution range of contaminated soil region；
Step S2, the soil in pollution range that step S1 is determined, which is dug out, carries out destructive distillation processing；
Step S3, sections bottom soil layer surface after step S2 digs out contaminated soil using charcoal sorbing material make one every
Disconnected protective layer；
The soil repaired after step S2 destructive distillation processing is backfilling into and digs out contaminated soil and in bottom charcoal by step S4
Sorbing material has built the region of partition protective layer, and adds charcoal into the soil that upper strata backfills；
Step S5 is repaiied by the grown on soil plant that step S4 repairs backfill and is added to charcoal with carrying out green
It is multiple.
As another aspect of the present invention, the present invention also provides a kind of device of repairing polluted soil, feature exists
In described device includes excavating equipment, conveying equipment, crushing plant, screening plant and distillation apparatus, for respectively to Polluted Soil
Earth is excavated, conveyed, crushed, sieved and destructive distillation processing；
Wherein, the conveying equipment includes the first conveying equipment, the second conveying equipment and third conveying equipment；Excavating equipment
It is connect by the first conveying equipment with crushing plant；Crushing plant is connect by the second conveying equipment with distillation apparatus feed inlet；
It is transmitted back to by destructive distillation treated rehabilitating soil by third conveying equipment and excavates the region of the contaminated soil and backfill；And
Be set forth in distillation unit is container-type distillation apparatus, is loaded in container, is readily transported.
Based on above-mentioned technical proposal it is found that methods and apparatus of the present invention can be realized：(1) contaminated soil it is innoxious,
Stabilization treatment；(2) processing contaminated soil facility floor space is small, high degree of automation, and contaminated soil can be carried out
Original place is administered；(3) it is protected between the soil and bottom initial soil layer that backfill after repair using the partition that charcoal sorbing material is established
Sheath can be administered to avoid contaminated soil after repairing, and remaining polluter rises again with underground water in the deep soil of bottom
Soil is polluted；(4) contaminated soil is handled using cracking process, it can be to avoid traditional Polluted Soil such as burning method, chemical method
The secondary pollution caused by administering region surrounding air and environment in processing procedure of earth processing method；It (5) can be with by destructive distillation
By heavy metal vitrifying, the curing in contaminated soil.
Description of the drawings
Fig. 1 is that each equipment of device of repairing polluted soil of the present invention acts on schematic diagram corresponding with soil layer；
Fig. 2 is the flow chart of the repairing polluted soil method as a preferred embodiment of the invention；
Fig. 3 is the schematic diagram of the distillation apparatus of the repairing polluted soil as a preferred embodiment of the invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in further detail.
The invention discloses a kind of methods of repairing polluted soil, include the following steps：
Step S1 determines the pollution range of contaminated soil region；
Step S2, the soil in pollution range that step S1 is determined, which is dug out, carries out destructive distillation processing；
Step S3, sections bottom soil layer surface after step S2 digs out contaminated soil using charcoal sorbing material make one every
Disconnected protective layer；
The soil repaired after step S2 destructive distillation processing is backfilling into and digs out contaminated soil and in bottom charcoal by step S4
Sorbing material has built the region of partition protective layer, and adds charcoal into the soil that upper strata backfills；
Step S5 is repaiied by the grown on soil plant that step S4 repairs backfill and is added to charcoal with carrying out green
It is multiple.
Wherein, the soil for administering region to contaminated soil by drilling equipment in step S1 is drilled, is sampled, detection soil
Earth pollution layer depth, area, analyze pollutant kind, determine pollution range.
Wherein, destructive distillation processing is carried out to the contaminated soil dug out by container-type distillation apparatus in step S2.
Wherein, step S2 carries out in retort process contaminated soil, produced by the organic pollution pyrolysis in contaminated soil
Destructive distillation vapour purified, detached, be recycled by gas processing device, generated combustible gas is transmitted back in distillation apparatus
As fuel, generated dry distillation liquid, which is transported in storage tank, to be recycled.
Wherein, the charcoal sorbing material thickness that partition protective layer is built in step S3 is 100~300mm.The charcoal adsorption material
Material can be activated carbon or/and activated coke.
Wherein, the step of adding charcoal into backfill soil in step S4 includes：
On backfill rehabilitating soil surface charcoal is sowed by 2~3 tons per acre；After sowing by charcoal and surface 200~
The rehabilitating soil of 300mm thickness is mixed.
The charcoal is using sludge of sewage treatment plant, organic domestic waste, stalk as raw material, by made of destructive distillation
Soil conditioner.
The invention also discloses a kind of device of repairing polluted soil, described device includes excavating equipment, conveying equipment, breaks
Broken equipment, screening plant and distillation apparatus, for contaminated soil is excavated respectively, convey, crush, sieve and destructive distillation at
Reason；
Wherein, the conveying equipment includes the first conveying equipment, the second conveying equipment and third conveying equipment；Excavating equipment
It is connect by the first conveying equipment with crushing plant；Crushing plant is connect by the second conveying equipment with distillation apparatus feed inlet；
It is transmitted back to by destructive distillation treated rehabilitating soil by third conveying equipment and excavates the region of the contaminated soil and backfill；And
The device of the repairing polluted soil is loaded in container, is readily transported.
Wherein, the device further includes：Gas processing device, for the destructive distillation to being generated during destructive distillation contaminated soil
Vapour carries out purification separation processing, and gas processing device air intake is connect by pipeline with distillation apparatus destructive distillation vapor outlet, at gas
The outlet of reason equipment dry distillation liquid is connect with storage tank import.
As a preferred embodiment of the present invention, the invention discloses a kind of method of repairing polluted soil, such as Fig. 1 institutes
Show, include the following steps：
First, soil pollution region drilled, sampled
The soil in soil pollution region that plan is administered is drilled using drilling equipment, is sampled, detects contaminated soil
Depth, area analyze pollutant kind etc. in contaminated soil, and according to the exploration result and ambient environmental conditions system of contaminated soil
Determine contaminated soil remediation scheme.
2nd, destructive distillation processing is carried out after contaminated soil is excavated
Contaminated soil remediation complete set of equipments is transported into construction site.And by excavating equipment, the first conveying device, broken set
Standby, the second conveying device, distillation apparatus, cooling equipment, third conveying equipment, gas processing device, storage tank, container control
Room, container-type generator etc. are put in place.
Contaminated soil is excavated with excavating equipment, is transported in crushing plant by the first conveying device, will be polluted
The bulk matter such as the stone in soil are crushed.Contaminated soil after break process is transported to by the second conveying equipment dry
It evaporates in equipment.
Start distillation apparatus, contaminated soil is subjected to destructive distillation processing in distillation apparatus.The destructive distillation generated in retort process
Vapour is pipelined to progress purification separation processing in gas processing device.What destructive distillation vapour generated after purification separation is handled
Combustible gas is transmitted back in distillation apparatus as fuel, the dry distillation liquid that destructive distillation vapour generates after purification separation is handled convey storage tank into
Row recycling.
Contaminated soil be transported to after being discharged from distillation apparatus as rehabilitating soil after destructive distillation is handled cooling equipment into
Row cooling treatment.
Rehabilitating soil after cooling is chemically examined, detects whether the rehabilitating soil after destructive distillation reaches environmental protection standard and safety
Index.
3rd, the heatable adobe sleeping platform bottom place mat charcoal sorbing material after contaminated soil cleaning
After the contaminated soil in partial contamination region is cleared by excavating equipment completely, dirt is being cleaned out first
The charcoal sorbing material of 100~300mm of place mat thickness above the original soil layer of the heatable adobe sleeping platform bottommost of soil is contaminated as partition protective layer, is used
Pollutant that is remaining in filtering absorption retention deep soil, being permeated up with underground water.Then charcoal sorbing material is being used
Reach the rehabilitating soil of environmental protection standard and safety index above the partition protective layer of construction after backfill destructive distillation by detection.
4th, the rehabilitating soil of backfill is added into charcoal
When the rehabilitating soil of backfill reaches the ground level of design, charcoal is sprinkled above rehabilitating soil, by per acre 2
~3 tons are sowed.Charcoal with the rehabilitating soil of 200~300mm of surface thickness is mixed after sowing, on the one hand increases and repairs soil
Organic matter and nutrient in earth also function to convenient for the charcoal in the vegetation for restoring rehabilitating soil, another aspect rehabilitating soil
The ecology of pollutant that is remaining in absorption local soil, being permeated up with underground water, further Conservative restoration soil and surrounding
Environment.
5th, planting plants (including herbaceous plant, shrub, arbor) carry out green on the land restoration for be mixed with charcoal
It repairs, also referred to as biological prosthetic or green reparation.
Periodically rehabilitating soil is detected, whether observe in rehabilitating soil has pollutant, and be mixed with charcoal
The plants such as trees, vegetables, flowers are planted in rehabilitating soil, growing plants above rehabilitating soil or vegetables are examined every year
It surveys, whether have pollutant, through observation in a few years, if rehabilitating soil and repaiied if observing in above-mentioned plant roots and stems fruit or vegetables
Pollutant is not detected in the plant roots and stems fruit planted in earth backing earth or vegetables, then proves that the contaminated soil is repaired.
Charcoal sorbing material used herein above can be activated carbon and/or activated coke, preferably using semi-coke as raw material, pass through
Activated coke made of activation.
Here the step of destructive distillation contaminated soil, is that contaminated soil is heated under anaerobic, makes pollution by high temperature
Thermal cracking occurs for the organic pollution in soil.Its gaseous products is mainly flammable low molecular compound：It is gaseous have hydrogen,
Methane, carbon monoxide etc..Metal in contaminated soil is cured by high-temperature oxydation → passivation → ash content.According to U.S.'s associated companies
Research, in contaminated soil more than 90% heavy metal such as Cd, Co, Cr, Cu, Fe, Ni, Pb and Zn etc. by high-temperature oxydation, passivation,
Vitrifying is realized, which is verified by the related experiment of Environmental Protection Agency USA, as a result complies fully with China's correlation
National standard.
Preferably, as shown in Fig. 2, the invention discloses a kind of method of repairing polluted soil, wherein to some techniques
Process and parameter request are finer, such as soil screening requirement is in below 8cm.
Preferably, charcoal used herein above is for original with sludge of sewage treatment plant, organic domestic waste, stalk etc.
Material, is made up, main function includes of destructive distillation：
(1) there is the ability of absorption VOC (volatile organic compounds)；
(2) plurality of plant diseases can be prevented in agricultural soil reparation；
(3) available for the industrial land soil remediation that for example insecticide factory's resettlement is left；
(4) there is the ability of absorption heavy metal and various pesticide residues；
(5) there is the ability for promoting microbial degradation, suitable ecological environment can be provided for microorganism, promote microorganism
Growth and breeding, so as to improve its degradation capability to harmful substance；
(6) charcoal is alkalescent, has the neutralization of acid soil；
(7) injury of the crops continuous cropping plantation to soil can be repaired；
(8) water penetration, the aeration of its porosity formation can repair loamy ground；
(9) water-retaining property of its porosity formation, nutrient preserving capability can repair sandy soil.
As a preferred embodiment of the present invention, the invention also discloses a kind of device of repairing polluted soil, packets
It includes：
One drilling equipment, for being drilled, being sampled to contaminated soil.
The complete mobile equipment of destructive distillation contaminated soil, including：Excavating equipment, the first conveying device, crushing plant, the second conveying
Device, distillation apparatus, cooling equipment, gas processing device, storage tank, container control room, container generating set, container life
Facility living.
The container-type living facilities include：Container house, container kitchen, container dining room, container-type
Lobby.Container premises is equipped with double high sunken bed, shower cabinet, toilet seat, washing basin.Container is equipped with cupboard in kitchen
Cabinet, sthenic fire range, refrigerator, vegetable bowl, disinfection cabinet etc..Container is equipped with dining table and dining chair in dining room.In container lobby
TV, seat etc. are installed.
The distillation apparatus, including platform container, screw conveyor, cooling equipment, chimney, switch board, feeding warehouse
Deng.
The distillation apparatus, using the distillation apparatus of conventional principles, as long as disclosure satisfy that under anaerobic state to pollution
Soil is pyrolyzed.Preferably, rotary kiln may be used, distillation apparatus as shown in Figure 3 can also be used, it is above-mentioned to set
Standby integrate is placed in a platform container, is readily transported and is moved.Protection is made with high-temperature refractory in heating equipment periphery
Liner, prevents high temperature from damaging babinet.
In equipment shown in Fig. 3, it is division wall 11 made of high-temperature refractory among heating room 10, heating room 10 is divided
Into two parts, the wherein heating room 10 of 1 one end of stove tail is high-temperature region 13, and the heating room 10 of 20 one end of burner is low-temperature space 14；
It heats and 3 temperature sensors 15 is installed in 13 one side wall of high-temperature region of room 10, high-temperature region is respectively pacified on 13 two side
Fill 3~6 gas-fired equipments 16.When the distillation apparatus is run, monitored, and pass through by 3 temperature sensors 15 of high-temperature region 13
It adjusts the heating load of each gas-fired equipment 16, controls the temperature in different zones in high-temperature region 13, wherein, high-temperature region 13 and close
The region of 1 one end of stove tail, temperature are 700~850 DEG C, high-temperature region 13 and close to the region of 11 one end of division wall, temperature for 500~
600℃；
It heats and 3 temperature sensors 15 is installed in 14 one side wall of low-temperature space of room 10, low-temperature space 14 and close division wall
1~2 combustion apparatus 16 is respectively installed on 11 one end two side.When the distillation apparatus is run, passed by 3 temperature of low-temperature space 14
Sensor 15 monitors, and by adjusting the heating load of each combustion apparatus 16, controls the temperature in different zones in low-temperature space 14,
In, the region of low-temperature space 14 and close 11 one end of division wall, temperature is 300~400 DEG C；Low-temperature space 14 and close 20 one end of burner
Region, temperature be 100~200 DEG C；
Double-deck weight plate turnover ash discharge valve 4 is installed on the discharge port 3 of 1 lower part of stove tail, when distillation apparatus is run, contaminated soil
It is discharged under the action of its weight by double-deck weight plate turnover ash discharge valve 4, while double-deck weight plate turnover ash discharge valve 4 can prevent sky
Gas enters in stove tail 1；
1-2 air passages 12 are arranged in the heating room 10 and lower part of division wall 11, when distillation apparatus is run, the gas in high-temperature region 13
Body enters low-temperature space 14 by air passage 12, and low-temperature space is heated.Heat room 10 and low-temperature space 14, close 20 one end of burner
Top have exhanst gas outlet 19, heat indoor exhaust gas and discharged by exhanst gas outlet 19；
Steam outlet 22 is arranged at the top of burner 20, and regulating valve 23 is arranged at 22 top of steam outlet, and 23 top of regulating valve is
Water vapour delivery pipe 24；
The top of stove tail 1 has fuel gas to export 2, has detection of negative pressure equipment 5 on 1 side wall of stove tail.When distillation apparatus is run,
Combustible gas discharge fan by 2 extraction of fuel gas outlet, then passes through the fuel gas generated in the roller 7 of high-temperature region
Combustible gas discharge fan 27, flammable tracheae 18 are transported to gas-fired equipment 16.When distillation apparatus is run, pass through detection of negative pressure equipment 5
It detects and controls combustible gas discharge fan 27 to operate, avoids negative pressure occur in stove tail 1.
Burner 20, stove tail 1 and 7 connecting portion of roller and roller 7 have sealing device 28 with heating 10 connecting portion of room.
The fuel gas inlet of gas-fired equipment 16 is connect with two gas pipelines, wherein one is external Gas Pipe 17, Ling Yigen
For the flammable tracheae 18 generated in distillation apparatus roller 7, valve is mounted on every pipeline, gas-fired equipment 16 is by combustion fan
6 provide air required during burning.
The screw conveyor 21 that contaminated soil is installed through burner 20 delivers into roller 7, contaminated soil stirring in roller 7
Under the action of plate 8, to the rolling of stove tail direction, movement.Recovery time of the contaminated soil in roller 7 is 90~120 minutes；
Roller 7 is made of high temperature resistant stainless steel material, and both ends are located on carrying roller 9,7 one end rack gear 25 of roller, is driven
Dynamic device 26 is rotated by 25 driving drum 7 of gear ring.Ranging from 2~5 revs/min of the adjustment of rotational speed of roller 7, the draw ratio of roller 7
It is 10~15: 1,7 inclination angle of roller is 1~2 °.Contaminated soil packing factor is 0.2~0.3 in roller 7.
Spray column and/or inter cooler may be used in the gas processing device.
The method of the present invention is compared by practical probation with existing soil restoring technology, is had the following advantages that
And advantageous effect：
(1) relative to the soil washing for being substantially at the laboratory research stage, although the technology utilizes fluid removal soil
Earth pollutant realizes separation, isolation, the volume reduction of certain dangerous substances and the innoxious transformation of dangerous substance, and effect is preferable,
But the technical finesse process makes a large amount of Soil Nutrient Leachings, and seriously destroys soil microaggregate structure, soil in itself can not
It recycles, while a large amount of waste liquid can be generated in lessivation, secondary pollution, and a large amount of waste liquor contamination undergrounds are caused to soil
Water causes to seriously affect, may cause very big harm to surrounding resident life and health；
(2) relative to thermal desorption method, although the technique effect is preferable, especially to Hg contaminated soils, commercialization fortune has been realized
Make, repair time is short, but the technology can cause the soil organism and constitution water to be destroyed, and driving soil moisture needs to consume
A large amount of energy, and easily cause secondary pollution；
(3) relative to stabilization method is cured, although the firming body permanent stabilization that the technology is formed, can as construction material, it is real
Existing harmless treatment, but the technology required temperature is higher, needs that a large amount of energy is lost, it is difficult to large area using and pushing away
Extensively；
(4) relative to soil steam extraction process (SVE), although the technology goes volatility and half volatile organic contaminant
It is small to soil texture disturbance except rate is higher, and can realize that cleaning is discharged with the soil of low-cost processes large area, but the skill
Art is influenced big and is difficult to improve treatment effeciency (being difficult to more than 90%) by the gas permeability of soil；
(5) relative to simple phytoremediation, although the obvious technical effects, the technology is not yet ripe, still needs to
Further investigation, and the technology consuming time is long, handles limited strength.
In conclusion the restorative procedure of the present invention can realize that disposal of resources, floor space are small, treating capacity is big, automatic
Change degree is high and being capable of original place improvement.It is tangible to belong to the new and high technology for being worth promoting the use of on a large scale.
Particular embodiments described above has carried out the purpose of the present invention, technical solution and advantageous effect further in detail
Describe in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the protection of the present invention
Within the scope of.
Claims (10)
- A kind of 1. method of repairing polluted soil, which is characterized in that include the following steps：Step S1 determines the pollution range of contaminated soil region；Step S2, the soil in pollution range that step S1 is determined, which is dug out, carries out destructive distillation processing；Step S3, the sections bottom soil layer surface after step S2 digs out contaminated soil are made a partition using charcoal sorbing material and are protected Sheath；The soil repaired after step S2 destructive distillation processing is backfilling into and digs out contaminated soil and adsorbed in bottom with charcoal by step S4 Material has built the region of partition protective layer, and adds charcoal into the soil that upper strata backfills；Step S5 is backfilled being repaired by step S4 and is added to the grown on soil plant of charcoal to carry out green reparation.
- 2. according to the method described in claim 1, it is characterized in that, area is administered to contaminated soil by drilling equipment in step S1 The soil in domain is drilled, is sampled, and detection soil pollution layer depth, area analyze pollutant kind, determine pollution range.
- 3. according to the method described in claim 1, it is characterized in that, by container-type distillation apparatus to digging out in step S2 Contaminated soil carries out destructive distillation processing.
- 4. according to the method described in claim 3, it is characterized in that, step S2 is in contaminated soil progress retort process, polluting Destructive distillation vapour caused by organic pollution pyrolysis in soil is purified by gas processing device, is detached, is recycled, institute The combustible gas of generation is transmitted back in distillation apparatus as fuel, and generated dry distillation liquid, which is transported in storage tank, to be recycled.
- 5. according to the method described in claim 1, it is characterized in that, the charcoal sorbing material that partition protective layer is built in step S3 is thick It spends for 100~300mm.
- 6. according to the method described in claim 5, it is characterized in that, the charcoal sorbing material can be activated carbon or/and activity It is burnt.
- 7. according to the method described in claim 1, it is characterized in that, the step of adding charcoal into backfill soil in step S4 Including：On backfill rehabilitating soil surface charcoal is sowed by 2~3 tons per acre；It is after sowing that charcoal and 200~300mm of surface is thick Rehabilitating soil mixed.
- 8. the method according to the description of claim 7 is characterized in that the charcoal described in step S4, is with sewage treatment plant Sludge, organic domestic waste, stalk are raw material, pass through soil conditioner made of destructive distillation.
- 9. a kind of device of repairing polluted soil, which is characterized in that described device includes excavating equipment, conveying equipment, broken sets Standby, screening plant and distillation apparatus, for contaminated soil is excavated respectively, convey, crush, sieve and destructive distillation processing；Wherein, the conveying equipment includes the first conveying equipment, the second conveying equipment and third conveying equipment；Excavating equipment passes through First conveying equipment is connect with crushing plant；Crushing plant is connect by the second conveying equipment with distillation apparatus feed inlet；By Treated that rehabilitating soil is transmitted back to by third conveying equipment excavates the region backfill of the contaminated soil for destructive distillation；AndThe destructive distillation device is container-type distillation apparatus, is loaded in container, is readily transported.
- 10. device according to claim 9, which is characterized in that the device further includes：Gas processing device is used for Carry out purification separation processing to the destructive distillation vapour generated during destructive distillation contaminated soil, gas processing device air intake by pipeline with Distillation apparatus destructive distillation vapor outlet connects, and the outlet of gas processing device dry distillation liquid is connect with storage tank import.
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| CN201611234000.3A CN108237142A (en) | 2016-12-27 | 2016-12-27 | A kind of method and apparatus of repairing polluted soil |
| PCT/CN2017/116976 WO2018121327A1 (en) | 2016-12-27 | 2017-12-18 | Method and device for remediating contaminated soil |
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