CN117019849A - Soil remediation process for organic matter pollution treatment - Google Patents
Soil remediation process for organic matter pollution treatment Download PDFInfo
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- CN117019849A CN117019849A CN202311039309.7A CN202311039309A CN117019849A CN 117019849 A CN117019849 A CN 117019849A CN 202311039309 A CN202311039309 A CN 202311039309A CN 117019849 A CN117019849 A CN 117019849A
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- 239000002689 soil Substances 0.000 title claims abstract description 125
- 238000005067 remediation Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000008569 process Effects 0.000 title claims abstract description 17
- 239000005416 organic matter Substances 0.000 title claims abstract description 9
- 238000001179 sorption measurement Methods 0.000 claims abstract description 88
- 230000000694 effects Effects 0.000 claims abstract description 27
- 238000001035 drying Methods 0.000 claims abstract description 13
- 230000035699 permeability Effects 0.000 claims abstract description 12
- 239000012855 volatile organic compound Substances 0.000 claims description 34
- 239000003463 adsorbent Substances 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 125000006850 spacer group Chemical group 0.000 claims description 7
- 238000009423 ventilation Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 239000002274 desiccant Substances 0.000 claims description 3
- 238000007865 diluting Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000012780 transparent material Substances 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 2
- 230000009471 action Effects 0.000 abstract description 6
- 239000011148 porous material Substances 0.000 abstract description 5
- 230000011218 segmentation Effects 0.000 description 14
- 238000010521 absorption reaction Methods 0.000 description 7
- 239000003344 environmental pollutant Substances 0.000 description 7
- 231100000719 pollutant Toxicity 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 238000011065 in-situ storage Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000003610 charcoal Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 239000002957 persistent organic pollutant Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000002680 soil gas Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011066 ex-situ storage Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/005—Extraction of vapours or gases using vacuum or venting
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a soil remediation process for organic matter pollution treatment, which belongs to the field of soil remediation, and is characterized in that high-temperature air is led to enter and exit in soil through pretreatment of drying and dredging the soil, so that the effect of loosening the soil is realized, pores in the soil are more, the overflow of volatile organic matters is facilitated, the drying speed is accelerated, the viscosity of the soil is further reduced, the pores in the soil are further increased, the permeability of the soil is obviously increased, the overflow of the volatile organic matters in a negative pressure state is facilitated, the treatment efficiency is obviously accelerated compared with the prior art, meanwhile, under the action of circumferential adsorption of polished rods, the section adsorption strips continuously collide with a wooden baffle plate to accelerate the adsorption of the overflowed volatile organic matters in the soil, the volatile organic matters can be rapidly diluted, and the potential safety hazard caused by unexpected leakage of the organic matters to surrounding organisms is obviously reduced.
Description
Technical Field
The invention relates to the field of soil remediation, in particular to a soil remediation process for organic matter pollution treatment.
Background
At present, the industrial and agricultural development is rapid, more and more organic pollutants enter the soil, and the physical health and environmental conditions of surrounding residents are seriously threatened. Volatile and semi-volatile organic pollutants are one of the main pollutants in such polluted sites, and the pollutants exist in soil for a long time, so that serious harm is caused to overground plants and underground organisms, and the pollutants can enter superficial groundwater along with rain wash to influence drinking water sources and further influence the body health of people.
The current soil remediation technology mainly comprises in-situ remediation and ex-situ remediation, and in-situ remediation is a mainstream technology due to the fact that pollutants are treated in situ, remote transportation and construction of expensive engineering infrastructure are not needed, operation and maintenance are simple and convenient, and the in-situ remediation is gradually a mainstream technology. Chemical and physical remediation methods are often employed in situ soil remediation techniques.
The chemical oxidation method in the chemical restoration method is a restoration technology with low cost and relatively simple treatment, and is suitable for the soil restoration technology of the organic matter polluted site with good permeability. The technology injects chemical oxidant into the ground, and damages and degrades organic pollutants in the soil into non-toxic or less harmful substances through contact of the oxidant and underground pollutants. The soil gas extraction technology in the physical remediation method is to extract the gas in a preset extraction well by using vacuum equipment, so that the soil in a polluted area generates negative pressure, air is driven to flow through soil pores, pollutants are forced to be extracted along with the soil gas, and then the pollutants are discharged after being treated, so that the purpose of soil remediation is achieved.
In the physical repair method, the soil with relatively high permeability is affected by the permeability in the soil, the overflowing speed of volatile organic compounds is relatively low even under the condition of negative pressure, the required treatment time is relatively long, the treatment efficiency is relatively low, in addition, when the volatile organic compounds are sucked out by negative pressure outwards, hidden danger of unexpected leakage exists, and when the volatile organic compounds are adsorbed by negative pressure, the concentration of the volatile organic compounds is relatively high, and relatively high potential safety hazards are easily caused to surrounding environment and organisms.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems existing in the prior art, the invention aims to provide a soil remediation process for organic matter pollution treatment, which is characterized in that the soil is subjected to drying and dredging pretreatment, namely high-temperature air is reversely filled into the soil, so that the soil is filled and discharged in the soil, the effect of loosening the soil is realized, the pores in the soil are more, the overflow of volatile organic matters is facilitated, the drying speed is accelerated, the viscosity of the soil is further reduced, the pores in the soil are further increased, the permeability of the soil is obviously increased, the overflow of the volatile organic matters is facilitated in a negative pressure state, compared with the prior art, the treatment efficiency is obviously accelerated, meanwhile, under the action of circumferential adsorption of polished rods, the section adsorption strips continuously collide with a wooden baffle plate, the volatile organic matters overflowed in the soil are adsorbed, the volatile organic matters can be quickly diluted, and the potential safety hazard caused by accidental leakage of the organic matters to surrounding organisms is obviously reduced.
2. Technical proposal
In order to solve the problems, the invention adopts the following technical scheme.
A soil remediation process for organic matter pollution treatment comprises the following steps:
s1, firstly, excavating a plurality of underground wind wells in soil polluted by organic matters;
s2, performing pretreatment of drying and dredging on soil through an air shaft;
s3, fixedly nailing a plurality of evenly-distributed wooden baffles into the inner wall of the air shaft after pretreatment, penetrating the circumferential adsorption polished rod into the air shaft, then sealing the air shaft through a cover plate with a communicating pipe, controlling the circumferential adsorption polished rod to rotate, and exhausting air to the outside of the air shaft through an exhaust fan to enable the inside of the soil to be kept in a negative pressure state;
s4, overflowing volatile organic compounds in the soil into the air shaft, absorbing part of the volatile organic compounds by the circumferential adsorption polished rod, diluting the concentration of the volatile organic compounds, pumping the diluted volatile organic compounds outwards from the air shaft by an exhaust fan, introducing the diluted volatile organic compounds into treatment equipment through a pipeline, and discharging the diluted volatile organic compounds after treatment;
s5, detecting the content of volatile organic compounds in the soil until the content is lower than a safety value, and finishing soil restoration.
Further, the step of preprocessing in S2 specifically includes:
s21, firstly, putting desiccant particles into an air shaft;
s22, introducing a large amount of air into the air shaft, and enabling the air to enter the soil along the soil gaps, so that an air passage is formed in the soil, and the permeability of the soil is improved;
s23, after 8-10 minutes, stopping air ventilation for 2-3 minutes, and quickly overflowing a large amount of air which is poured into the soil into the air shaft, so that the ventilation speed of the air in the soil is increased, and the overflowed air carries water vapor in the soil to enter the air shaft and be absorbed;
s24, repeating the steps S22-S23 for a plurality of times until the water content in the soil is 20-30%, and enabling air to rapidly enter and exit in the soil, so that the effect of loosening the soil is achieved, the holes in the soil are more, volatile gas is convenient to overflow, the effect of accelerating the drying speed is achieved, the viscosity of the soil is further reduced, the holes in the soil are further increased, the permeability of the soil is obviously improved, the overflow of volatile organic compounds is convenient under a negative pressure state, and the treatment efficiency is obviously accelerated.
Further, the air is high-temperature dry air, the temperature of the air is not lower than 120 ℃, and along with the introduction of the high-temperature air, the temperature of soil near the air shaft is gradually increased, so that the water in the air shaft is accelerated to be dispersed, and the pretreatment efficiency is further accelerated.
Furthermore, the cover plate with the communicating pipe is made of transparent materials, so that the luminous condition in the air shaft can be observed conveniently.
Further, the circumference adsorbs the polished rod and includes the light spot pole that passes through motor and apron connection, the light spot pole outer end fixedly connected with a plurality of evenly distributed's the segmentation adsorbs strip, a plurality of elastic spacers of inside fixedly connected with of segmentation adsorbs strip, and a plurality of absorption chambeies are cut apart into with the segmentation adsorption strip inner space to a plurality of elastic spacers, the absorption intracavity is filled with the charcoal adsorbent, at circumference absorption polished rod rotation in-process, the segmentation adsorbs strip bumps with wooden baffle many times, makes the position of inside charcoal adsorbent granule constantly change, and then fully with the contact of the volatile organic compounds that overflows in the soil, makes the adsorption efficiency better.
Further, the hardness of the sectional adsorption strip is gradually reduced from the root connected with the light spot rod to the end far away from the light spot rod, the elasticity is gradually improved, and the elasticity of the end of the sectional adsorption strip is highest, so that the sectional adsorption strip has higher unloading force effect when contacting with the wooden baffle, and is not easy to damage due to collision.
Further, the filling degree of the biochar adsorbent in the adsorption cavity is 75-85%, so that the biochar adsorbent in the adsorption cavity can have enough space for generating position movement under the action of impact force during impact.
Further, the outer end of the light spot rod is provided with a plurality of evenly distributed hemispherical grooves, the slot opening of each hemispherical groove is fixedly connected with a transparent baffle, fluorescent liquid is filled in a space surrounded by the transparent baffle and the hemispherical grooves, the hemispherical grooves are located on the inner sides of the sectional adsorption strips, when the sectional adsorption strips accidentally fall off due to long-time contact with the wooden baffle, the fluorescent liquid emits light, the inside sectional adsorption strips can be conveniently known to fall off in time through the transparent cover plate, and after the sectional adsorption strips fall off, the inside biological carbon adsorbent is scattered in a wind shaft, so that the effect of adsorbing volatile organic matters can be played.
Further, the segmentation adsorption strip is the opaque porous structure of dark, and the dark makes it have certain shading effect to when making segmentation adsorption strip drop outward, the light that the fluorescent liquid produced is difficult for penetrating the outside, and segmentation adsorption strip length is greater than the distance between light spot pole and the wooden baffle, when making rotate, under centrifugal force effect, segmentation adsorption strip can contact with wooden baffle, and wooden baffle hardness is lower, can be when taking place the striking, makes segmentation adsorption strip and the tip of its contact be difficult for being damaged.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) According to the scheme, the soil is subjected to pretreatment of drying and dredging, so that high-temperature air enters and exits in the soil, the effect of loosening the soil is achieved, holes in the soil are more, volatile organic matters are convenient to overflow, the effect of accelerating drying speed is achieved, the viscosity of the soil is further reduced, holes in the soil are further increased, the permeability of the soil is remarkably increased, the volatile organic matters are convenient to overflow in a negative pressure state, the treatment efficiency is remarkably improved compared with the prior art, meanwhile, under the action of a circumferential adsorption polished rod, the section adsorption strip continuously collides with a wooden baffle when the overflowed volatile organic matters, the volatile organic matters overflowing in the soil are accelerated to be rapidly diluted, and the potential safety hazard of unexpected leakage of the organic matters to surrounding organisms is remarkably reduced.
(2) The air is high-temperature dry air, the temperature of the air is not lower than 120 ℃, and the temperature of soil near the air shaft is gradually increased along with the introduction of the high-temperature air, so that the water in the air shaft is dispersed in an accelerated manner, and the pretreatment efficiency is further improved.
(3) The circumference adsorbs the polished rod including the light spot pole of being connected through motor and apron, the light spot pole outer end fixedly connected with a plurality of evenly distributed's the section adsorbs strip, the inside fixedly connected with of section adsorbs strip a plurality of elastic septum, a plurality of elastic septum cuts apart into a plurality of absorption chambeies with the section adsorption strip inner space, the absorption intracavity is filled with biological charcoal adsorbent, at circumference adsorption polished rod rotation in-process, the section adsorbs strip bumps with wooden baffle many times, make inside biological charcoal adsorbent granule's position constantly change, and then the contact with the volatile organic compounds that overflows in the soil, make the adsorption effect better.
(4) The hardness of the sectional adsorption strip is gradually reduced from the root connected with the light spot rod to the end far away from the light spot rod, the elasticity is gradually improved, and the elasticity of the end of the sectional adsorption strip is highest, so that the sectional adsorption strip has higher unloading effect when contacting with a wooden baffle, and is not easy to damage due to collision.
(5) The filling degree of the biochar adsorbent in the adsorption cavity is 75-85%, so that the biochar adsorbent in the adsorption cavity can have enough space for generating position movement under the action of impact force during impact.
(6) The outer end of the light spot rod is provided with a plurality of evenly distributed hemispherical grooves, the slot opening of each hemispherical groove is fixedly connected with a transparent baffle, fluorescent liquid is filled in a space surrounded by the transparent baffle and the hemispherical grooves, the hemispherical grooves are located on the inner sides of the sectional adsorption strips, when the sectional adsorption strips accidentally fall off due to long-time contact with the wooden baffle, the fluorescent liquid emits light, the inside sectional adsorption strips are convenient to timely know to fall off through the transparent cover plate, after the sectional adsorption strips fall off, the inside biochar adsorbent is scattered in a wind well, and the effect of adsorbing volatile organic compounds can be played.
(7) The segmentation adsorption strip is the opaque porous structure of dark, and the dark makes it have certain shading effect to when making segmentation adsorption strip drop outward, the light that the fluorescent liquid produced is difficult for penetrating the outside, and segmentation adsorption strip length is greater than the distance between light spot pole and the wooden baffle, when making to rotate, under centrifugal force effect, segmentation adsorption strip can contact with wooden baffle, and wooden baffle hardness is lower, can be when taking place the striking, makes segmentation adsorption strip and the tip of its contact be difficult for being damaged.
Drawings
FIG. 1 is a block diagram of the main flow of the present invention;
FIG. 2 is a schematic flow chart of pretreatment according to the present invention;
FIG. 3 is a schematic view of the circumferential adsorbing polish rod of the present invention installed in a wind well;
fig. 4 is a schematic view of the structure of the lower end portion of the circumferential suction polish rod of the present invention.
The reference numerals in the figures illustrate:
1 light spot rod, 2 section adsorption strips, 3 elastic spacers and 4 hemispherical grooves.
Detailed Description
The drawings in the embodiments of the present invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only a few embodiments of the present invention; but not all embodiments, are based on embodiments in the present invention; all other embodiments obtained by those skilled in the art without undue burden; all falling within the scope of the present invention.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1:
referring to fig. 1 and 3, a represents a wind shaft, b represents a wooden baffle, c represents a circumferential adsorption polish rod, d represents a cover plate with a communicating pipe, wherein the communicating pipe is used for connecting an exhaust fan, and a soil remediation process for organic matter pollution treatment comprises the following steps:
s1, firstly, excavating a plurality of underground wind wells in soil polluted by organic matters;
s2, performing pretreatment of drying and dredging soil through an air shaft, referring to FIG. 2, wherein the pretreatment steps specifically comprise:
s21, firstly, putting desiccant particles into an air shaft;
s22, introducing a large amount of air into the air shaft, and enabling the air to enter the soil along the soil gaps, so that an air passage is formed in the soil, and the permeability of the soil is improved;
s23, after 8-10 minutes, stopping air ventilation for 2-3 minutes, and quickly overflowing a large amount of air which is poured into the soil into the air shaft, so that the ventilation speed of the air in the soil is increased, and the overflowed air carries water vapor in the soil to enter the air shaft and be absorbed;
s24, repeating the steps S22-S23 for a plurality of times until the water content in the soil is 20-30%, and enabling air to rapidly enter and exit in the soil, so that the effect of loosening the soil is achieved, the holes in the soil are more, volatile gas is convenient to overflow, the effect of accelerating the drying speed is achieved, the viscosity of the soil is further reduced, the holes in the soil are further increased, the permeability of the soil is obviously improved, the overflow of volatile organic compounds is convenient under a negative pressure state, and the treatment efficiency is obviously accelerated.
S3, fixedly nailing a plurality of evenly-distributed wooden baffles into the inner wall of the air shaft after pretreatment, penetrating the circumferential adsorption polished rod into the air shaft, then sealing the air shaft through a cover plate with a communicating pipe, controlling the circumferential adsorption polished rod to rotate, and exhausting air to the outside of the air shaft through an exhaust fan to enable the inside of the soil to be kept in a negative pressure state;
s4, overflowing volatile organic compounds in the soil into the air shaft, absorbing part of the volatile organic compounds by the circumferential adsorption polished rod, diluting the concentration of the volatile organic compounds, pumping the diluted volatile organic compounds outwards from the air shaft by an exhaust fan, introducing the diluted volatile organic compounds into treatment equipment through a pipeline, and discharging the diluted volatile organic compounds after treatment;
s5, detecting the content of volatile organic compounds in the soil until the content is lower than a safety value, and finishing soil restoration.
The air is high-temperature dry air, the temperature of the air is not lower than 120 ℃, and along with the introduction of the high-temperature air, the temperature of soil near the air shaft is gradually increased, so that the moisture in the air shaft is accelerated to be dispersed, the pretreatment efficiency is further improved, the cover plate with the communicating pipe is made of a transparent material, and the light-emitting condition in the air shaft is conveniently observed.
Referring to fig. 4, the circumferential adsorption polish rod comprises a light spot rod 1 connected with a cover plate through a motor, wherein the outer end of the light spot rod 1 is fixedly connected with a plurality of uniformly distributed segmented adsorption strips 2, the hardness of the segmented adsorption strips 2 is gradually reduced from the root connected with the light spot rod 1 to the end far away from the light spot rod 1, the elasticity is gradually improved, the elasticity of the end of the segmented adsorption strip 2 is highest, the segmented adsorption strip can have higher unloading force effect when being contacted with a wooden baffle, so that the wooden baffle is not easy to damage due to collision, a plurality of elastic spacers 3 are fixedly connected inside the segmented adsorption strip 2, the inner space of the segmented adsorption strip 2 is divided into a plurality of adsorption cavities by the plurality of elastic spacers 3, the biochar adsorbent is filled in the adsorption cavities, and the biochar adsorbent in the adsorption cavities has the filling degree of 75-85%, so that the biochar adsorbent in the adsorption cavities can have enough space for generating position movement under the action of the collision force during collision; in the rotation process of the circumferential adsorption polished rod, the segmented adsorption strips 2 collide with the wooden baffle plate for a plurality of times, so that the positions of the internal biochar adsorbent particles are continuously changed, and then the contact of the internal biochar adsorbent particles with volatile organic matters overflowed from the soil is realized, and the adsorption effect is better.
The outer end of the light spot rod 1 is provided with a plurality of evenly distributed hemispherical grooves 4, the notch of the hemispherical grooves 4 is fixedly connected with a transparent baffle, fluorescent liquid is filled in a space surrounded by the transparent baffle and the hemispherical grooves 4, the hemispherical grooves 4 are positioned on the inner side of the segmented adsorption strip 2, when the segmented adsorption strip 2 accidentally drops due to contact with a wooden baffle for a long time, the fluorescent liquid emits light, the segmented adsorption strip 2 inside the transparent cover plate is convenient to timely understand to drop, after the segmented adsorption strip 2 drops, biological carbon adsorbent in the segmented adsorption strip falls into a wind well, the function of adsorbing volatile organic matters can be achieved, the segmented adsorption strip 2 is of a dark opaque porous structure, the dark color enables the segmented adsorption strip 2 to have a certain shading effect, so that when the segmented adsorption strip 2 drops out, light generated by the fluorescent liquid is not easy to be emitted to the outer side, and the length of the segmented adsorption strip 2 is larger than the distance between the light spot rod 1 and the wooden baffle, when the segmented adsorption strip 2 rotates, the segmented adsorption strip 2 can be contacted with the wooden baffle under the effect of centrifugal force, and the wooden baffle is easy to damage the end of the segmented adsorption strip 2 when the wooden baffle is easy to drop.
Through the preliminary treatment of carrying out dry mediation to soil, fill high temperature air promptly in reverse to soil, make its business turn over in soil, both realized the effect of loosening soil, make its inside hole more, be convenient for the overflow of volatile organic compounds, also realized accelerating the effect of drying rate, and then make the viscidity decline of soil, further increase soil mesopore, show the permeability of increase soil, be convenient for under negative pressure state, the overflow of volatile organic compounds is compared with prior art, show the acceleration treatment effeciency, simultaneously under the effect of circumference absorption polished rod, its volatile organic compounds that overflows in the peripheral biological hidden danger is caused to the unexpected leakage of organic compounds that the section absorption strip 2 constantly bumps with wooden baffle, adsorb volatile organic compounds that overflows in the soil with higher speed, make it can be diluted fast, show.
The above; is only a preferred embodiment of the present invention; the scope of the invention is not limited in this respect; any person skilled in the art is within the technical scope of the present disclosure; equivalent substitutions or changes are made according to the technical proposal of the invention and the improved conception thereof; are intended to be encompassed within the scope of the present invention.
Claims (9)
1. A soil remediation process for organic matter pollution treatment is characterized in that: the method comprises the following steps:
s1, firstly, excavating a plurality of underground wind wells in soil polluted by organic matters;
s2, performing pretreatment of drying and dredging on soil through an air shaft;
s3, fixedly nailing a plurality of evenly-distributed wooden baffles into the inner wall of the air shaft after pretreatment, penetrating the circumferential adsorption polished rod into the air shaft, then sealing the air shaft through a cover plate with a communicating pipe, controlling the circumferential adsorption polished rod to rotate, and exhausting air to the outside of the air shaft through an exhaust fan to enable the inside of the soil to be kept in a negative pressure state;
s4, overflowing volatile organic compounds in the soil into the air shaft, absorbing part of the volatile organic compounds by the circumferential adsorption polished rod, diluting the concentration of the volatile organic compounds, pumping the diluted volatile organic compounds outwards from the air shaft by an exhaust fan, introducing the diluted volatile organic compounds into treatment equipment through a pipeline, and discharging the diluted volatile organic compounds after treatment;
s5, detecting the content of volatile organic compounds in the soil until the content is lower than a safety value, and finishing soil restoration.
2. A soil remediation process for organic pollution remediation according to claim 1 wherein: the pretreatment step in S2 specifically comprises the following steps:
s21, firstly, putting desiccant particles into an air shaft;
s22, introducing a large amount of air into the air shaft, and enabling the air to enter the soil along the soil gaps, so that an air passage is formed in the soil, and the permeability of the soil is improved;
s23, after 8-10 minutes, stopping air ventilation for 2-3 minutes, and quickly overflowing a large amount of air which is poured into the soil into the air shaft, so that the ventilation speed of the air in the soil is increased, and the overflowed air carries water vapor in the soil to enter the air shaft and be absorbed;
s24, repeating the steps S22-S23 for a plurality of times until the water content in the soil is 20-30%, and rapidly feeding and discharging air in the soil, so that the effect of loosening the soil is achieved, and the effect of accelerating drying is also achieved.
3. A soil remediation process for organic pollution remediation according to claim 2 wherein: the air is high-temperature dry air, and the temperature of the air is not lower than 120 ℃.
4. A soil remediation process for organic pollution remediation according to claim 1 wherein: the cover plate with the communicating pipe is made of transparent materials.
5. A soil remediation process for organic pollution remediation according to claim 4 wherein: the circumferential adsorption polish rod comprises a light spot rod (1) connected with a cover plate through a motor, wherein the outer end of the light spot rod (1) is fixedly connected with a plurality of evenly distributed segmental adsorption strips (2), a plurality of elastic spacers (3) are fixedly connected inside the segmental adsorption strips (2), the inner space of the segmental adsorption strips (2) is divided into a plurality of adsorption cavities by the plurality of elastic spacers (3), and biochar adsorbents are filled in the adsorption cavities.
6. A soil remediation process for organic pollution remediation according to claim 5 wherein: the hardness of the segmented adsorption strip (2) gradually decreases from the root connected with the light spot rod (1) to the end far away from the light spot rod (1), and the elasticity gradually increases.
7. A soil remediation process for organic pollution remediation according to claim 5 wherein: the filling degree of the biochar adsorbent in the adsorption cavity is 75-85%.
8. A soil remediation process for organic pollution remediation according to claim 6 wherein: the light spot rod is characterized in that a plurality of hemispherical grooves (4) which are uniformly distributed are cut at the outer end of the light spot rod (1), a transparent baffle is fixedly connected to the notch of each hemispherical groove (4), fluorescent liquid is filled in a space surrounded by the transparent baffle and the hemispherical grooves (4), and the hemispherical grooves (4) are located on the inner sides of the sectional adsorption strips (2).
9. A soil remediation process for organic pollution remediation according to claim 8 wherein: the sectional adsorption strip (2) is of a dark opaque porous structure, and the length of the sectional adsorption strip (2) is larger than the distance between the light spot rod (1) and the wooden baffle.
Priority Applications (1)
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| JP2008284436A (en) * | 2007-05-16 | 2008-11-27 | Shimizu Corp | Soil purification system |
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