CN113857228A - Remediation method based on polluted homeland resources and space planning utilization method thereof - Google Patents
Remediation method based on polluted homeland resources and space planning utilization method thereof Download PDFInfo
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- CN113857228A CN113857228A CN202111147598.3A CN202111147598A CN113857228A CN 113857228 A CN113857228 A CN 113857228A CN 202111147598 A CN202111147598 A CN 202111147598A CN 113857228 A CN113857228 A CN 113857228A
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000005067 remediation Methods 0.000 title claims description 24
- 239000002689 soil Substances 0.000 claims abstract description 228
- 238000011282 treatment Methods 0.000 claims abstract description 47
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- 239000000126 substance Substances 0.000 claims abstract description 16
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- 230000008439 repair process Effects 0.000 claims abstract description 9
- 230000003647 oxidation Effects 0.000 claims abstract description 6
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 6
- 230000009467 reduction Effects 0.000 claims abstract description 6
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- 238000005070 sampling Methods 0.000 claims description 34
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- 239000007924 injection Substances 0.000 claims description 9
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 239000007800 oxidant agent Substances 0.000 claims description 8
- 230000001590 oxidative effect Effects 0.000 claims description 8
- 238000005485 electric heating Methods 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 7
- 230000000593 degrading effect Effects 0.000 claims description 6
- 239000010802 sludge Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 4
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- 230000015556 catabolic process Effects 0.000 claims description 3
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- 238000006731 degradation reaction Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
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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
- B09C1/08—Reclamation of contaminated soil chemically
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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
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
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Abstract
The invention relates to the technical field of contaminated soil treatment, in particular to a method for repairing contaminated soil and planning and recycling the contaminated soil in space, and particularly relates to a repairing method based on contaminated national soil resources and a space planning and utilizing method thereof, which comprises the following steps: a1, selecting a polluted land area to be treated; a2, carrying out multi-point position collection of soil samples in a selected area; a3, analyzing the pollution components of the collected soil sample; a4, recording the analysis result of the components. The method adopts an outdoor field treatment mode to treat the polluted soil in the selected area, uses local materials, and can ensure the treatment effect on the soil after primary repair and secondary repair; the primary restoration can effectively realize high-temperature treatment and in-situ chemical oxidation or reduction of the soil, improve the soil quality, and meanwhile, the biodegradation in the secondary restoration can effectively decompose excessive harmful substances in the soil.
Description
Technical Field
The invention relates to the technical field of contaminated soil treatment, in particular to a method for repairing contaminated soil and performing space planning and recycling on the contaminated soil, and particularly relates to a repairing method based on contaminated national soil resources and a space planning and utilizing method thereof.
Background
The land resource is a material foundation on which the country and residents rely to live, and is a material entity composed of natural resources and social and economic resources, generally speaking, the land resource only comprises natural resources such as land, rivers, lakes and seas, mineral deposits and the like, wherein the land soil resource occupies an important proportion in the whole country resource, and the damage and the pollution to the land resource are increasingly serious along with the continuous development of industrialization at present.
At present, the state has already proposed a plurality of innovative documents for the treatment of the land pollution, and in the years, a plurality of enterprises have carried out a plurality of improvements and treatments for the polluted land resource, for example, in the patent application numbers: the patent document CN 201910313604.4 discloses a method for remediating organic contaminated site soil, which is not suitable for remediating contaminated soil in a large area and a large volume because it is only suitable for treating small samples of soil in a small area range and a small volume by using mechanical equipment and has a limited capability of remediating actual land resources.
Therefore, the method suitable for field restoration of the polluted land and the method for planning and reusing the treated polluted land are researched and designed.
Disclosure of Invention
In order to solve one of the technical problems, the invention adopts the technical scheme that: the restoration method based on the polluted homeland resources comprises the following steps:
a1, selecting a polluted land area to be treated;
a2, carrying out multi-point position collection of soil samples in a selected area;
a3, analyzing the pollution components of the collected soil sample;
a4, recording the analysis result of the components;
a5, forming a temporary storage space in the selected area, excavating the soil at the temporary storage space downwards, transferring the soil to an area outside the temporary storage space for stacking, and forming a storage pit after excavating the temporary storage space;
a6, performing primary remediation on the polluted land soil around the storage pit by using soil treatment equipment;
a7, discharging the primarily repaired soil into a storage pit by soil property treatment equipment for stacking after the primarily repaired soil is subjected to component inspection and reaches the standard;
a8, repeating the steps A5-A7 to complete the primary repair of the soil in the whole area;
a9, mechanically flattening the piled soil after primary restoration and loosening the soil;
a10: periodically spraying a degrading microbial liquid on the land subjected to primary remediation in a full area to realize secondary remediation;
a11: and detecting and recording soil components of the soil sprayed with the degradation microbial liquid once every 10 days until the detection result reaches the standard.
In any of the above embodiments, preferably, the step of collecting soil samples at multiple locations in the selected area in the step a2 includes:
averagely classifying the whole area into 100 small sampling subareas according to the total area value of the current area, and numbering the sampling subareas;
selecting a sampling point in each sampling partition, and sampling for multiple times at the position of the sampling point along different depth ranges, wherein the depth difference of adjacent sampling positions is 1 meter;
the soil sample that gathers the different degree of depth carries out the serial number mark and deposits in proper order, uses the sampling subregion to be anterior segment serial number during wherein the serial number, uses the sampling point degree of depth as the back end serial number, and the final serial number of current soil sample, the serial number example are formed in the combination of two: and N + M, wherein N is the number of the sampling partition and M is the sampling depth.
In any of the above schemes, preferably, the temporary storage space is excavated to form a storage pit, wherein the depth of the storage pit is determined according to the current contaminated depth of soil, and it is required to ensure that the soil at the bottom of the storage pit is the soil with the standard composition.
In any of the above schemes, preferably, the polluted soil dug from the storage deep pit is separated from the soil after primary remediation, placed and separated by partition; untreated contaminated soil can be stacked and primarily remediated soil can be stacked.
In any of the above embodiments, it is preferable that the storage pits are arranged adjacently to each other when the storage pit is excavated.
In any of the above schemes, preferably, the interval period of spraying the degrading microorganism liquid in the whole area is 5-10 days; spraying the degraded microbial liquid in the whole area each time, and performing mechanized deep ploughing after the soil surface is dried.
The invention also provides soil treatment equipment, which is the soil treatment equipment, the soil treatment equipment is provided with outdoor power generation equipment for supplying power to the soil treatment equipment, the soil treatment equipment comprises a fixedly arranged feeding bulk cargo part, the discharging port of the bulk material feeding part and a soil conveying and stir-frying mechanism are used for realizing rolling conveying and stir-frying of the polluted soil put into the soil conveying and stir-frying mechanism at a high temperature and realizing in-situ chemical oxidation or reduction of the soil after mixing, the soil conveying stir-frying mechanism conveys soil in an intermittent conveying mode, the feeding end of the feeding bulk cargo part is used for receiving the conveyed soil polluted from the outside, the outlet end of the soil conveying stir-frying mechanism conveys the soil subjected to primary remediation treatment to a storage deep pit at a corresponding position through a discharge pipeline;
the outer side wall of the soil conveying stir-frying mechanism is provided with a magnetizing assembly, and the magnetizing assembly is used for enabling the inside of the soil conveying stir-frying mechanism to form a magnetic field;
the soil conveying and stir-frying mechanism is provided with a plurality of injection devices, and each injection device is respectively used for spraying in-situ chemical oxidant powder or reducing agent powder to the soil in the soil conveying and stir-frying mechanism.
In any of the above schemes, preferably, the feeding bulk cargo part comprises a fixedly arranged feeding hopper, an openable cover plate is arranged at the top of the feeding hopper, the lower part of the feeding hopper is in a necking arrangement, and a porous bulk cargo net is arranged in an inner cavity of the lower part of the feeding hopper;
and a blanking vibrator is fixedly arranged on the outer side wall of the lower part of the feed hopper.
In any of the above schemes, preferably, the soil conveying stir-frying mechanism includes a plurality of spiral feeders connected in series and fixedly arranged, each spiral feeder is horizontally arranged, a discharge pipe of the spiral feeder located at the upstream is connected with a feed pipe of the spiral feeder located at the downstream and adjacent to the spiral feeder, both ends of a spiral conveying blade shaft inside each spiral feeder are movably extended to the outside of a heat absorption steel outer cylinder of the spiral feeder, each spiral conveying blade shaft is driven by a stepping motor fixedly arranged at a corresponding position, metal end covers at both ends of each heat absorption steel outer cylinder are respectively provided with an electric heating body in a plug manner, and each electric heating body is used for realizing auxiliary electric heating of the heat absorption steel outer cylinder after being electrified.
In any of the above schemes, preferably, a solar heat absorption coating layer is coated on the surface of each soil conveying stir-frying mechanism; the heat absorption steel outer cylinders of the spiral feeders are used for absorbing sunlight and heating the spiral feeders, and the heat absorption steel outer cylinders can conduct heat to soil conveyed inside the spiral feeders after absorbing heat.
In any of the above schemes, preferably, a rainproof cover is covered on the periphery of each stepping motor.
In any of the above schemes, preferably, a discharging vibrator is installed on the outer side wall of the discharging pipeline.
In any of the above schemes, preferably, the magnetizing assembly includes a plurality of magnetizing components respectively mounted on the outer side walls of the corresponding spiral feeders, the magnetizing components include a plurality of bush-shaped magnet blocks respectively fixedly mounted on the outer side walls of the heat-absorbing steel outer cylinders of the corresponding spiral feeders, and each of the bush-shaped magnet blocks is composed of two symmetrical bush-shaped permanent magnet blocks fixedly mounted on the outer side walls of the heat-absorbing steel outer cylinders.
In any of the above schemes, preferably, the injection device includes a high-pressure powder nozzle fixedly installed on the outer side wall of the heat-absorbing steel outer cylinder, the inner end of the high-pressure powder nozzle extends into the material conveying cavity inside the heat-absorbing steel outer cylinder, and the inlet end of the high-pressure powder nozzle is connected with the feeding end of the external in-situ chemical oxidant powder or reducing agent powder through a powder conveying pipe.
The invention also provides a space planning and utilizing method based on the polluted homeland resources, which is characterized by comprising the following steps: the method comprises the following steps:
b1: repairing the soil in the polluted national soil resources to form standby soil;
b2: spraying the spare soil to obtain slurry;
b3: after the mud is hardened and filtered, introducing the mud into a cement rotary kiln for burning and solidifying soil to form dried sludge;
b4: preparing the dried sludge into building blocks;
b5: building the building main body by using the building blocks, and finally realizing the restoration and reutilization of the soil in the polluted national soil resources.
Compared with the prior art, the invention has the following beneficial effects:
1. the method adopts an outdoor field treatment mode to treat the polluted soil in the selected area, uses local materials, and can ensure the treatment effect on the soil after primary repair and secondary repair; the primary restoration can effectively realize high-temperature treatment and in-situ chemical oxidation or reduction of the soil, improve the soil quality, and meanwhile, the biodegradation in the secondary restoration can effectively decompose excessive harmful substances in the soil.
2. The whole treatment process adopts a mode of subarea sampling and integral analysis, so that comprehensive and comprehensive component analysis before soil treatment can be effectively realized, and more real and reasonable sample component reference is provided for subsequent soil treatment.
3. The whole treatment process adopts an alternate transfer mode and keeps the soil repeatedly transferred in a selected area to realize efficient soil separation and remediation, thereby ensuring the effective isolation of the polluted soil and the remediated soil and avoiding secondary pollution.
4. Soil property treatment equipment that adopts in the whole processing procedure can realize effectively utilizing two kinds of modes of sunshine heating and electric auxiliary heating to realize the high temperature treatment to the soil in carrying, improves high temperature repairing effect effectively, and the high temperature is interrupted the in-process of carrying and is adopted the mode of spraying oxidant or reductant to realize further repairing simultaneously, improves the primary prosthetic effect of soil.
5. The soil restoration effect can be further ensured when the soil is carried out in a magnetized magnetic field in the primary restoration process.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or components are generally identified by like reference numerals. In the drawings, elements or components are not necessarily drawn to scale.
Fig. 1 is a partial sectional structural view of the present invention.
In the figure, 1, storing deep pit; 2. a feed hopper; 3. a cover plate; 4. a perforated bulk mesh; 5. a blanking vibrator; 6. a spiral feeder; 7. a screw conveying blade shaft; 8. a heat absorbing steel outer cylinder; 9. a stepping motor; 10. a metal end cap; 11. an electric heater; 12. a solar heat absorption coating layer; 13. a helical blade; 14. a rain-proof outer cover; 15. a discharge conduit; 16. discharging a vibrator; 17. a bearing bush permanent magnet block; 18. a high pressure powder spray head; 19. a material conveying cavity; 20. a powder conveying pipe.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, the present invention also provides a soil treatment apparatus, which is the soil treatment apparatus described above, the soil treatment equipment is provided with outdoor power generation equipment for supplying power to the soil treatment equipment, the soil treatment equipment comprises a fixedly arranged feeding bulk cargo part, the discharging port of the bulk material feeding part and a soil conveying and stir-frying mechanism are used for realizing rolling conveying and stir-frying of the polluted soil put into the soil conveying and stir-frying mechanism at a high temperature and realizing in-situ chemical oxidation or reduction of the soil after mixing, the soil conveying stir-frying mechanism conveys soil in an intermittent conveying mode, the feeding end of the feeding bulk cargo part is used for receiving the conveyed soil polluted from the outside, the outlet end of the soil conveying and stir-frying mechanism conveys the soil subjected to primary remediation treatment to the storage deep pit 1 at the corresponding position through a discharge pipeline 15;
the outer side wall of the soil conveying stir-frying mechanism is provided with a magnetizing assembly, and the magnetizing assembly is used for enabling the inside of the soil conveying stir-frying mechanism to form a magnetic field;
the soil conveying and stir-frying mechanism is provided with a plurality of injection devices, and each injection device is respectively used for spraying in-situ chemical oxidant powder or reducing agent powder to the soil in the soil conveying and stir-frying mechanism.
The whole equipment is built in a selected polluted area, and firstly, the polluted land polluted area to be treated is selected;
collecting soil samples at multiple points in a selected area;
analyzing the pollution components of the collected soil sample;
recording the analysis result of the components;
the method comprises the steps of forming a temporary storage space in a selected area, downwards excavating soil in the temporary storage space, transferring the soil to an area outside the temporary storage space for stacking, forming a storage pit 1 after excavating the temporary storage space to finish the operations of pre-investigation and soil component analysis in the current area, discontinuously putting soil to be treated at a corresponding position into the equipment by using an excavator after finishing the operations, enabling the soil to enter from a feeding bulk material part, realizing high-temperature treatment through the treatment of a soil conveying stir-frying mechanism, fully contacting with powder of a common in-situ chemical oxidant or reducing agent in soil remediation, then realizing forward conveying, finally enabling the repaired soil to enter the storage pit 1, controlling the whole treatment time according to needs, and controlling the shutdown time and the running speed of the specific soil conveying stir-frying mechanism by professionals in the field, meanwhile, the soil at the discharge port of the soil conveying and stir-frying mechanism needs to be periodically sampled and analyzed to better control the repair time, and the whole primary adsorption is carried out in the magnetized soil conveying and stir-frying mechanism.
In any of the above schemes, preferably, the feeding bulk cargo part comprises a fixedly arranged feeding hopper 2, an openable cover plate 3 is arranged at the top of the feeding hopper 2, the lower part of the feeding hopper 2 is arranged in a necking manner, and a porous bulk cargo net 4 is arranged in an inner cavity at the lower part of the feeding hopper 2;
and a blanking vibrator 5 is fixedly arranged on the outer side wall of the lower part of the feed hopper 2.
Get into the inside soil of feeder hopper 2 and can realize loosely through foraminiferous bulk cargo net 4, simultaneously in order to protect the smooth transport of soil, get into feeder hopper 2 at soil and need refine the processing to it, still set up blanking vibrator 5 here for the smoothness nature of guaranteeing the feeding simultaneously.
In any of the above schemes, preferably, the soil conveying stir-frying mechanism includes a plurality of spiral feeders 6 connected in series and fixedly arranged, each spiral feeder 6 is horizontally arranged, a discharge pipe of the spiral feeder 6 located at the upstream is connected with a feed pipe of the spiral feeder 6 located at the downstream and adjacent to the discharge pipe, both ends of a spiral conveying blade shaft 7 inside each spiral feeder 6 are movably extended to the outside of a heat-absorbing steel outer cylinder 8 of the spiral feeder 6, each spiral conveying blade shaft 7 is driven by a stepping motor 9 fixedly arranged at a corresponding position, an electric heater 11 is respectively plugged at a metal end cover 10 at both ends of each heat-absorbing steel outer cylinder 8, and each electric heater 11 is used for realizing auxiliary electric heating of the heat-absorbing steel outer cylinder 8 after being electrified.
After the soil to be treated enters the spiral material feeders 6, the stepping motor 9 is started to convey the soil inside, and the stepping motor 9 can be controlled to rotate in the forward and reverse directions to convey and mix the soil inside the material conveying cavity 19 of the spiral material feeders 6 in a reciprocating manner, and corresponding pipeline control valves (not shown in the figure) are also arranged at the positions of the discharge pipes of the spiral material feeders 6 to control whether the spiral material feeders 6 output the soil outwards.
Normally, the electric heater 11 is in a normally closed state, and can be switched on to realize auxiliary heating when in use, generally used according to specific conditions, mainly because the heat absorption steel outer cylinder 8 of the spiral feeder 6 can effectively absorb heat and raise the temperature when irradiated by sunlight, and meanwhile, the heat absorption steel outer cylinder 8 is used as a metal material to ensure that the metal material can heat the metal material per se better, so the surface of the metal material is also sprayed with a solar heat absorption coating layer 12, the heat absorption effect is effectively improved, and the metal material can be better ensured to heat the metal material to a higher temperature.
In any of the above schemes, preferably, a solar heat-absorbing coating layer 12 is coated on the surface of the heat-absorbing steel outer cylinder 8 of each soil conveying stir-frying mechanism; the heat absorption steel outer cylinders 8 of the spiral feeders 6 are used for absorbing sunlight and heating the soil, the heat absorption steel outer cylinders 8 absorb heat, then the temperature of the heat absorption steel outer cylinders becomes very high, the heat is conducted to the soil conveyed inside the heat absorption steel outer cylinders, the soil contacted with the heat absorption steel outer cylinders is heated at a high temperature, and the high-temperature treatment of the soil inside the heat absorption steel outer cylinders can be continuously completed by back-and-forth conveying and stir-frying the spiral blades 13 on the spiral conveying blade shafts 7.
In any of the above schemes, it is preferable that a rainproof cover 14 is covered on the periphery of each stepping motor 9, which can protect the motor.
In any of the above schemes, it is preferable that a discharging vibrator 16 is installed on the outer side wall of the discharging pipeline 15, so that the smoothness of discharging outwards can be effectively ensured.
In any of the above schemes, preferably, the magnetizing assembly includes a plurality of magnetizing components respectively mounted on the outer side walls of the corresponding spiral feeders 6, the magnetizing components include a plurality of bush-shaped magnet blocks respectively fixedly mounted on the outer side walls of the heat-absorbing steel outer cylinders 8 of the corresponding spiral feeders 6, and each of the bush-shaped magnet blocks is composed of two bush-shaped permanent magnet blocks 17 symmetrically and fixedly mounted on the outer side walls of the heat-absorbing steel outer cylinders 8.
The magnetizing assembly can enable the heat absorption steel outer cylinder 8 to be in a magnetizing state, so that high-temperature treatment and in-situ chemical oxidation and reduction treatment of soil can be carried out in a magnetic field state, and the repairing treatment effect can be effectively improved.
In any of the above schemes, preferably, the injection device includes a high-pressure powder nozzle 18 fixedly installed on the outer side wall of the heat absorption steel outer cylinder 8, the inner end of the high-pressure powder nozzle 18 extends into a material conveying cavity 19 inside the heat absorption steel outer cylinder 8, and the inlet end of the high-pressure powder nozzle 18 is connected with the feeding end of the external in-situ chemical oxidant powder or reducing agent powder through a powder conveying pipe 20.
The injection device can intermittently make the dispersed powder in-situ chemical oxidant powder or reducer powder fully contact with the soil during conveying and stir-frying through the high-pressure powder spray head 18, and the soil is kept in the heat absorption steel outer cylinder 8 for a certain time to stay and store, so that the effective repair of harmful substances and partial heavy metals in the soil can be effectively ensured.
A method for realizing remediation based on polluted national soil resources by utilizing the soil property treatment equipment comprises the following steps:
a1, selecting a polluted land area to be treated;
a2, carrying out multi-point position collection of soil samples in a selected area;
a3, analyzing the pollution components of the collected soil sample;
a4, recording the analysis result of the components;
a5, forming a temporary storage space in the selected area, excavating the soil at the temporary storage space downwards, transferring the soil to an area outside the temporary storage space for stacking, and forming a storage pit 1 after excavating the temporary storage space;
a6, carrying out primary remediation on the polluted land soil around the storage pit 1 by using soil treatment equipment;
after the soil to be treated enters the spiral material feeders 6, the stepping motor 9 is started to convey the soil inside, and the stepping motor 9 can be controlled to rotate in the forward and reverse directions to convey and mix the soil inside the material conveying cavity 19 of the spiral material feeders 6 in a reciprocating manner, and corresponding pipeline control valves (not shown in the figure) are also arranged at the positions of the discharge pipes of the spiral material feeders 6 to control whether the spiral material feeders 6 output the soil outwards.
A7, discharging the primarily repaired soil into a storage pit 1 through a discharge pipe of soil treatment equipment to stack after the primarily repaired soil is subjected to component inspection and reaches the standard;
a8, repeating the steps A5-A7 to complete the primary repair of the soil in the whole area;
a9, mechanically flattening the piled soil after primary restoration and loosening the soil;
a10: periodically spraying a degrading microbial liquid on the land subjected to primary remediation in a full area to realize secondary remediation;
a11: and detecting and recording soil components of the soil sprayed with the degradation microbial liquid once every 10 days until the detection result reaches the standard.
In any of the above embodiments, preferably, the step of collecting soil samples at multiple locations in the selected area in the step a2 includes:
averagely classifying the whole area into 100 small sampling subareas according to the total area value of the current area, and numbering the sampling subareas;
selecting a sampling point in each sampling partition, and sampling for multiple times at the position of the sampling point along different depth ranges, wherein the depth difference of adjacent sampling positions is 1 meter;
the soil sample that gathers the different degree of depth carries out the serial number mark and deposits in proper order, uses the sampling subregion to be anterior segment serial number during wherein the serial number, uses the sampling point degree of depth as the back end serial number, and the final serial number of current soil sample, the serial number example are formed in the combination of two: and N + M, wherein N is the number of the sampling partition and M is the sampling depth.
In any of the above schemes, preferably, the temporary storage space is excavated to form a storage pit 1, wherein the depth of the storage pit 1 is determined according to the current contaminated depth of soil, and it is required to ensure that the soil at the bottom of the storage pit 1 is the soil with the standard composition.
In any of the above schemes, it is preferable that the contaminated soil dug out from the storage pit 1 is separated from the soil after primary remediation, placed and isolated; untreated contaminated soil can be stacked and primarily remediated soil can be stacked.
In any of the above-described embodiments, it is preferable that the storage pits 1 are arranged adjacently to each other when excavating.
In any of the above schemes, preferably, the interval period of spraying the degrading microorganism liquid in the whole area is 5-10 days; spraying the degraded microbial liquid in the whole area each time, and performing mechanized deep ploughing after the soil surface is dried.
The invention also provides a space planning and utilizing method based on the polluted homeland resources, which is characterized by comprising the following steps: the method comprises the following steps:
b1: repairing the soil in the polluted national soil resources to form standby soil;
b2: spraying the spare soil to obtain slurry;
b3: after the mud is hardened and filtered, introducing the mud into a cement rotary kiln for burning and solidifying soil to form dried sludge;
b4: preparing the dried sludge into building blocks;
b5: building the building main body by using the building blocks, and finally realizing the restoration and reutilization of the soil in the polluted national soil resources.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications or the substitutions do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present invention, and the technical solutions are all covered in the scope of the claims and the specification of the present invention; it will be apparent to those skilled in the art that any alternative modifications or variations to the embodiments of the present invention may be made within the scope of the present invention.
The present invention is not described in detail, but is known to those skilled in the art.
Claims (10)
1. The restoration method based on the polluted homeland resources is characterized by comprising the following steps: the method comprises the following steps:
a1, selecting a polluted land area to be treated;
a2, carrying out multi-point position collection of soil samples in a selected area;
a3, analyzing the pollution components of the collected soil sample;
a4, recording the analysis result of the components;
a5, forming a temporary storage space in the selected area, excavating the soil at the temporary storage space downwards, transferring the soil to an area outside the temporary storage space for stacking, and forming a storage pit after excavating the temporary storage space;
a6, performing primary remediation on the polluted land soil around the storage pit by using soil treatment equipment;
a7, discharging the primarily repaired soil into a storage pit by soil property treatment equipment for stacking after the primarily repaired soil is subjected to component inspection and reaches the standard;
a8, repeating the steps A5-A7 to complete the primary repair of the soil in the whole area;
a9, mechanically flattening the piled soil after primary restoration and loosening the soil;
a10: periodically spraying a degrading microbial liquid on the land subjected to primary remediation in a full area to realize secondary remediation;
a11: and detecting and recording soil components of the soil sprayed with the degradation microbial liquid once every 10 days until the detection result reaches the standard.
2. The remediation method based on contaminated homeland resources of claim 1, wherein: the specific step of performing multi-site soil sample collection in the selected area in the step a2 includes:
averagely classifying the whole area into 100 small sampling subareas according to the total area value of the current area, and numbering the sampling subareas;
selecting a sampling point in each sampling partition, and sampling for multiple times at the position of the sampling point along different depth ranges, wherein the depth difference of adjacent sampling positions is 1 meter;
the soil sample that gathers the different degree of depth carries out the serial number mark and deposits in proper order, uses the sampling subregion to be anterior segment serial number during wherein the serial number, uses the sampling point degree of depth as the back end serial number, and the final serial number of current soil sample, the serial number example are formed in the combination of two: and N + M, wherein N is the number of the sampling partition and M is the sampling depth.
3. The polluted homeland-based resource remediation method of claim 2, wherein: and forming a storage pit after the temporary storage space is excavated, wherein the depth of the storage pit is determined according to the current polluted depth of soil, and the soil at the bottom of the storage pit needs to be ensured to be up to standard.
4. The polluted homeland-based resource remediation method of claim 3, wherein: the polluted soil dug out of the storage deep pit is separated from the soil subjected to primary restoration and placed and isolated; untreated contaminated soil can be stacked and primarily remediated soil can be stacked.
5. The polluted homeland-based resource remediation method of claim 4, wherein: and when the storage deep pits are excavated, the storage deep pits are distributed in an adjacent arrangement mode.
6. The polluted homeland-based resource remediation method of claim 5, wherein: the interval period of spraying the degrading microbial liquid in the whole area is 5-10 days; spraying the degraded microbial liquid in the whole area each time, and performing mechanized deep ploughing after the soil surface is dried.
7. A soil treatment device as claimed in any one of claims 1 to 6, configured with an outdoor power generation device to power it, characterised in that: the soil property treatment equipment comprises a fixedly arranged feeding bulk cargo part, a discharge hole of the feeding bulk cargo part and a soil conveying and stir-frying mechanism, wherein the soil conveying and stir-frying mechanism is used for realizing rolling conveying and stir-frying of the polluted soil put into the soil at a high temperature and realizing in-situ chemical oxidation or reduction of the soil after mixing, the soil conveying and stir-frying mechanism conveys the soil in an intermittent conveying mode, a feeding end of the feeding bulk cargo part is used for receiving the conveyed soil from the polluted outside, and an outlet end of the soil conveying and stir-frying mechanism conveys the soil subjected to primary remediation treatment to a storage deep pit at a corresponding position through a discharging pipeline;
the outer side wall of the soil conveying stir-frying mechanism is provided with a magnetizing assembly, and the magnetizing assembly is used for enabling the inside of the soil conveying stir-frying mechanism to form a magnetic field;
the soil conveying and stir-frying mechanism is provided with a plurality of injection devices, and each injection device is respectively used for spraying in-situ chemical oxidant powder or reducing agent powder to the soil in the soil conveying and stir-frying mechanism.
8. Soil treatment apparatus according to claim 7, wherein: the feeding bulk cargo part comprises a fixedly arranged feeding hopper, the top of the feeding hopper is provided with an openable cover plate, the lower part of the feeding hopper is in necking arrangement, and a porous bulk cargo net is arranged in an inner cavity of the lower part of the feeding hopper;
and a blanking vibrator is fixedly arranged on the outer side wall of the lower part of the feed hopper.
9. Soil treatment apparatus according to claim 8, wherein: the soil conveying stir-frying mechanism comprises a plurality of spiral material feeders which are connected in series and fixedly arranged, each spiral material feeder is horizontally arranged, a discharge pipe of the spiral material feeder positioned at the upper part is connected with a feed pipe of the spiral material feeder positioned at the lower part and adjacent to the spiral material feeder, two ends of a spiral conveying blade shaft inside each spiral material feeder are movably extended to the outside of a heat absorption steel outer barrel of the spiral material feeder, each spiral conveying blade shaft is driven by a stepping motor fixedly arranged at the corresponding position, an electric heating body is respectively plugged at metal end covers at two ends of each heat absorption steel outer barrel, and each electric heating body is used for realizing auxiliary electric heating of the heat absorption steel outer barrel after being electrified.
10. The space planning utilization method based on the polluted homeland resources is characterized by comprising the following steps: the method comprises the following steps:
b1: repairing the soil in the polluted national soil resources to form standby soil;
b2: spraying the spare soil to obtain slurry;
b3: after the mud is hardened and filtered, introducing the mud into a cement rotary kiln for burning and solidifying soil to form dried sludge;
b4: preparing the dried sludge into building blocks;
b5: building the building main body by using the building blocks, and finally realizing the restoration and reutilization of the soil in the polluted national soil resources.
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