CN113695379A - Treatment method of high-concentration phosphorus-containing soil - Google Patents
Treatment method of high-concentration phosphorus-containing soil Download PDFInfo
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- CN113695379A CN113695379A CN202111036957.8A CN202111036957A CN113695379A CN 113695379 A CN113695379 A CN 113695379A CN 202111036957 A CN202111036957 A CN 202111036957A CN 113695379 A CN113695379 A CN 113695379A
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- 239000002689 soil Substances 0.000 title claims abstract description 124
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 85
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 85
- 239000011574 phosphorus Substances 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000002347 injection Methods 0.000 claims abstract description 48
- 239000007924 injection Substances 0.000 claims abstract description 48
- 239000003814 drug Substances 0.000 claims abstract description 37
- 238000003756 stirring Methods 0.000 claims abstract description 37
- OBSZRRSYVTXPNB-UHFFFAOYSA-N tetraphosphorus Chemical compound P12P3P1P32 OBSZRRSYVTXPNB-UHFFFAOYSA-N 0.000 claims abstract description 35
- 230000000694 effects Effects 0.000 claims abstract description 20
- 238000011065 in-situ storage Methods 0.000 claims abstract description 20
- 239000003381 stabilizer Substances 0.000 claims abstract description 18
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 239000004568 cement Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 239000000440 bentonite Substances 0.000 claims description 8
- 229910000278 bentonite Inorganic materials 0.000 claims description 8
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 8
- 238000012423 maintenance Methods 0.000 claims description 8
- 239000011398 Portland cement Substances 0.000 claims description 6
- 239000000292 calcium oxide Substances 0.000 claims description 6
- 235000012255 calcium oxide Nutrition 0.000 claims description 6
- 239000010865 sewage Substances 0.000 claims description 3
- 229940079593 drug Drugs 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 239000002002 slurry Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims 1
- 238000009412 basement excavation Methods 0.000 abstract description 12
- 230000007613 environmental effect Effects 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 8
- 238000002485 combustion reaction Methods 0.000 abstract description 5
- 230000002269 spontaneous effect Effects 0.000 abstract description 5
- 230000006641 stabilisation Effects 0.000 abstract description 4
- 238000011105 stabilization Methods 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000036541 health Effects 0.000 description 5
- 230000000087 stabilizing effect Effects 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
- 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
- B09C2101/00—In situ
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- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention relates to the technical field of environmental protection, and discloses a disposal method of high-concentration phosphorus-containing soil, which comprises the steps of cleaning the ground surface of a phosphorus-containing polluted site, determining in-situ injection points according to the distribution condition of phosphorus pollution in the soil, injecting a stabilizing agent into the phosphorus-polluted soil through an injection pipe at a high pressure, carrying out in-situ stirring on the soil by using a stirring head, maintaining at normal temperature for 1-7 days, and finally carrying out excavation and end disposal. By adopting in-situ pretreatment, the activity of yellow phosphorus is reduced by a stabilization reaction, and the safety and environmental risks of exposing phosphorus-containing soil to the air in direct excavation are avoided; the soil disturbance can be reduced through high-pressure injection and in-situ stirring, and the large-area contact of phosphorus-containing soil and air is avoided; the colloidal layer is formed after the stabilization medicament reacts with the yellow phosphorus on the soil surface and is maintained, air is isolated, and spontaneous combustion of the yellow phosphorus is prevented, so that the effect of reducing the activity of the yellow phosphorus in a pretreatment stage is achieved, and the environmental problem generated in the excavation process is reduced.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to a method for treating high-concentration phosphorus-containing soil.
Background
In the process of urban plot development in recent years, phosphorus-containing polluted soil buried under the ground is often encountered, mainly caused by stealing and filling phosphorus-containing wastewater, phosphorus mud and the like by early yellow phosphorus manufacturers. The polluted soil contains high-concentration yellow phosphorus, and the high-concentration yellow phosphorus cannot be naturally degraded after being buried in underground soil for decades, but is spontaneously combusted when being exposed in the air, so that a large amount of dense smoke is generated, and the human health is harmed.
At present, the existing phosphorus-containing soil treatment method has few patents, and most of the treatment methods are treatment after excavation, but the high-concentration phosphorus-containing soil can generate a large amount of dense smoke when meeting air in the excavation process, so that the construction progress can be seriously influenced, and the surrounding environment and the human health are harmed, so that the treatment method of the high-concentration phosphorus-containing soil is provided.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for treating high-concentration phosphorus-containing soil, which has the advantages of reducing the activity of yellow phosphorus in a pretreatment stage and reducing the environmental problem in the excavation process, and solves the problem that the high-concentration phosphorus-containing soil generates a large amount of dense smoke to harm the surrounding environment and the human health when meeting air in the excavation process.
(II) technical scheme
In order to achieve the purposes of reducing the activity of yellow phosphorus in the pretreatment stage and reducing the environmental problems in the excavation process, the invention provides the following technical scheme: a method for treating high-concentration phosphorus-containing soil comprises the following steps:
1) firstly, cleaning the surface of a phosphorus-containing polluted site to ensure that the ground phosphorus-containing polluted site is smooth;
2) then according to the distribution condition of phosphorus pollution in soil, determining in-situ injection points, wherein the injection depth is greater than the phosphorus pollution depth and preferably kept within the range of 0-6m, because the effect of the range is optimal, and then according to the triangular distribution points, the interval between each point is 1-3m, because the influence radius of the injection points is 1-3 m;
3) then, opening injection equipment into a phosphorus-polluted site, injecting a stabilizing agent into phosphorus-polluted soil through an injection pipe under high pressure, stirring the soil in situ by using a stirring head, stirring to loosen the soil structure and increase the porosity, so that the agent can be uniformly dispersed in the polluted soil by stirring and injecting, and maintaining at normal temperature for 1-7 days after the injection and stirring are finished;
4) and after the final maintenance is finished, excavating all the phosphorus-containing soil by adopting equipment such as an excavator and the like, and then transporting the phosphorus-containing soil to a specified cement plant for cement kiln cooperative treatment.
A stabilizing agent for high-concentration phosphorus-containing soil comprises the following components in parts by weight:
wherein, the ratio of water: 0.5-1.5% of a drug: 1;
the components of the medicament are as follows:
quicklime-50% -80%;
bentonite-20-30%;
portland cement-5-10%;
when the content of yellow phosphorus in the soil is 3000-10000mg/kg, the dosage is as follows:
dosage- -50-150kg (dry agent)/m3(soil).
Further, when the content of yellow phosphorus in the soil is 3000mg/kg, the dosage of the medicament can be 50kg (dry medicament)/m3(soil), wherein 50-70% of quicklime, 20-25% of bentonite and 5-8% of portland cement are used as one of the least components in the stabilizing agent preparation formula.
Further, when the content of yellow phosphorus in the soil is 6500mg/kg, the dosage of the medicament is 100kg (dry medicament)/m3(soil), wherein 65-80% of quicklime, 25-30% of bentonite and 5-7.5% of portland cement are used as a mixture ratio of the stabilizing agent preparation formula in terms of dosage compromise.
Further, when the content of yellow phosphorus in the soil is 10000mg/kg, the dosage of the medicament is 150kg (dry medicament)/m3(soil), wherein 60-80% of quicklime, 20-30% of bentonite and 8-10% of portland cement are used as the proportion with the highest dosage in the preparation formula of the stabilizing medicament.
Furthermore, the water can be clean water, or daily life sewage, river water and sewer water, so that the effect of resource recycling is achieved in order not to waste water resources.
Furthermore, the medicament form can select a liquid or slurry stabilizing medicament according to the soil layer distribution and the soil particle size, and the stabilizing medicaments in different forms are used according to the actual situation on site, so that the effect of reducing the activity of the yellow phosphorus is better.
Furthermore, the medicament component is mainly an alkaline medicament and can react with the yellow phosphorus in a stabilizing way, so that the activity of the yellow phosphorus is reduced.
Further, the bentonite has good ion exchange performance because cations such as Cu, Mg, Na and K in the bentonite are easy to exchange by other cations.
The utility model provides a medicament injection equipment, includes the automobile body, the inside right side fixedly connected with medicament jar of automobile body, the top left side fixedly connected with host computer of automobile body, the top fixedly connected with fluid-discharge tube of medicament jar, the one end bottom fixedly connected with injection syringe of keeping away from the medicament jar of fluid-discharge tube, the bottom of injection syringe is rotated and is connected with the stirring head.
(III) advantageous effects
Compared with the prior art, the invention provides a method for treating high-concentration phosphorus-containing soil, which has the following beneficial effects:
a method for treating high-concentration phosphorus-containing soil is characterized in that the activity of yellow phosphorus is reduced through a stabilization reaction by adopting in-situ pretreatment, so that the safety and environmental risks of exposing the phosphorus-containing soil in the air during direct excavation are avoided; the soil disturbance can be reduced through high-pressure injection and in-situ stirring, the large-area contact of phosphorus-containing soil and air is avoided, and the spontaneous combustion condition caused by the exposure of high-concentration yellow phosphorus in the air can be further prevented; the stabilizing agent reacts with yellow phosphorus on the surface of the soil, and a colloidal layer is formed after maintenance, so that the activity of the yellow phosphorus can be effectively reduced, air is isolated, and spontaneous combustion of the yellow phosphorus is prevented; the stabilized phosphorus-containing soil does not have pyrophoricity any more, so that the effect of reducing the activity of yellow phosphorus in the pretreatment stage is achieved, the environmental problem generated in the excavation process is reduced, the environment is protected from being polluted, the health and safety of people are not threatened, the phosphorus-containing soil can be excavated safely at the moment, and then the phosphorus-containing soil is transported to a cement plant to be cooperatively treated by a cement kiln.
Drawings
Fig. 1 is a schematic view of a medicament injection apparatus of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
The first embodiment is as follows:
a method for treating high-concentration phosphorus-containing soil comprises the following steps:
1) firstly, cleaning the surface of a phosphorus-containing polluted site to ensure that the ground phosphorus-containing polluted site is smooth;
2) then, according to the distribution condition of phosphorus pollution in soil, determining in-situ injection points, according to the condition of slight phosphorus pollution, keeping the injection depth at about 1-3m, then distributing the points according to a triangle, wherein the interval between every two points is 1-3m, and the influence radius of the injection points is 1-3 m;
3) then, opening injection equipment into a phosphorus-polluted site, injecting a stabilizing agent into phosphorus-polluted soil through an injection pipe under high pressure, stirring the soil in situ by using a stirring head, stirring to loosen the soil structure and increase the porosity, so that the agent can be uniformly dispersed in the polluted soil by stirring and injecting, and maintaining at normal temperature for 1-7 days after the injection and stirring are finished;
4) and after the final maintenance is finished, excavating all the phosphorus-containing soil by adopting equipment such as an excavator and the like, and then transporting the phosphorus-containing soil to a specified cement plant for cement kiln cooperative treatment.
Based on a treatment method of high-concentration phosphorus-containing soil, the stabilizing agent for the high-concentration phosphorus-containing soil is provided, and comprises the following components in parts by weight:
wherein, the ratio of water: 0.5: 1;
the components of the medicament are as follows:
quicklime-50%;
bentonite-20%;
portland cement-5%;
when the content of yellow phosphorus in the soil is 3000mg/kg, the dosage is as follows:
dosage- -50kg (dry dose)/m3(soil).
Based on the stabilizing agent for the high-concentration phosphorus-containing soil, the treatment method for the high-concentration phosphorus-containing soil is provided, and comprises the following steps:
1) firstly, cleaning the surface of a phosphorus-containing polluted site to ensure that the ground phosphorus-containing polluted site is smooth;
2) then, according to the distribution condition of phosphorus pollution in soil, determining in-situ injection points, according to the condition of slight phosphorus pollution, keeping the injection depth at about 1-3m, then distributing the points according to a triangle, wherein the interval between every two points is 1-3m, and the influence radius of the injection points is 1-3 m;
3) then, opening injection equipment into a phosphorus-polluted site, injecting a stabilizing agent into phosphorus-polluted soil through an injection pipe under high pressure, stirring the soil in situ by using a stirring head, stirring to loosen the soil structure and increase the porosity, so that the agent can be uniformly dispersed in the polluted soil by stirring and injecting, and maintaining at normal temperature for 1-7 days after the injection and stirring are finished;
4) and after the final maintenance is finished, excavating all the phosphorus-containing soil by adopting equipment such as an excavator and the like, and then transporting the phosphorus-containing soil to a specified cement plant for cement kiln cooperative treatment.
Example two:
a method for treating high-concentration phosphorus-containing soil comprises the following steps:
1) firstly, cleaning the surface of a phosphorus-containing polluted site to ensure that the ground phosphorus-containing polluted site is smooth;
2) then, according to the distribution condition of phosphorus pollution in soil, determining in-situ injection points, according to the condition of moderate phosphorus pollution, keeping the injection depth at 3-4m, then distributing the points according to a triangle, wherein the interval between each point is 1-3m, and the influence radius of each injection point is 1-3 m;
3) then, opening injection equipment into a phosphorus-polluted site, injecting a stabilizing agent into phosphorus-polluted soil through an injection pipe under high pressure, stirring the soil in situ by using a stirring head, stirring to loosen the soil structure and increase the porosity, so that the agent can be uniformly dispersed in the polluted soil by stirring and injecting, and maintaining at normal temperature for 1-7 days after the injection and stirring are finished;
4) and after the final maintenance is finished, excavating all the phosphorus-containing soil by adopting equipment such as an excavator and the like, and then transporting the phosphorus-containing soil to a specified cement plant for cement kiln cooperative treatment.
A stabilizing agent for high-concentration phosphorus-containing soil comprises the following components in parts by weight:
wherein, the ratio of water: 1: 1;
the components of the medicament are as follows:
quicklime-65%;
bentonite-25%;
portland cement-7.5%;
when the content of yellow phosphorus in the soil is 6500mg/kg, the dosage is as follows:
dosage- -100kg (dry dose)/m3(soil).
Example three:
a method for treating high-concentration phosphorus-containing soil comprises the following steps:
1) firstly, cleaning the surface of a phosphorus-containing polluted site to ensure that the ground phosphorus-containing polluted site is smooth;
2) then, according to the distribution condition of phosphorus pollution in soil, determining in-situ injection points, according to the high phosphorus pollution condition, keeping the injection depth at about 6m, then distributing the points according to a triangle, wherein the interval between every two points is 1-3m, and the influence radius of the injection points is 1-3 m;
3) then, opening injection equipment into a phosphorus-polluted site, injecting a stabilizing agent into phosphorus-polluted soil through an injection pipe under high pressure, stirring the soil in situ by using a stirring head, stirring to loosen the soil structure and increase the porosity, so that the agent can be uniformly dispersed in the polluted soil by stirring and injecting, and maintaining at normal temperature for 1-7 days after the injection and stirring are finished;
4) and after the final maintenance is finished, excavating all the phosphorus-containing soil by adopting equipment such as an excavator and the like, and then transporting the phosphorus-containing soil to a specified cement plant for cement kiln cooperative treatment.
A stabilizing agent for high-concentration phosphorus-containing soil comprises the following components in parts by weight:
wherein, the ratio of water: 1.5: 1;
the components of the medicament are as follows:
quicklime-80%;
bentonite-30%;
portland cement-10%;
when the content of yellow phosphorus in the soil is 10000mg/kg, the dosage is as follows:
dosage- -150kg (dry dose)/m3(soil).
The invention has the beneficial effects that: a method for treating high-concentration phosphorus-containing soil is characterized in that the activity of yellow phosphorus is reduced through a stabilization reaction by adopting in-situ pretreatment, so that the safety and environmental risks of exposing the phosphorus-containing soil in the air during direct excavation are avoided; the soil disturbance can be reduced through high-pressure injection and in-situ stirring, the large-area contact of phosphorus-containing soil and air is avoided, and the spontaneous combustion condition caused by the exposure of high-concentration yellow phosphorus in the air can be further prevented; the stabilizing agent reacts with yellow phosphorus on the surface of the soil, and a colloidal layer is formed after maintenance, so that the activity of the yellow phosphorus can be effectively reduced, air is isolated, and spontaneous combustion of the yellow phosphorus is prevented; the stabilized phosphorus-containing soil does not have pyrophoricity any more, so that the effect of reducing the activity of yellow phosphorus in the pretreatment stage is achieved, the environmental problem generated in the excavation process is reduced, the environment is protected from being polluted, the health and safety of people are not threatened, the phosphorus-containing soil can be excavated safely at the moment, and then the phosphorus-containing soil is transported to a cement plant to be cooperatively treated by a cement kiln.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A method for treating high-concentration phosphorus-containing soil is characterized by comprising the following steps: the method comprises the following steps:
1) firstly, cleaning the surface of a phosphorus-containing polluted site to ensure that the ground phosphorus-containing polluted site is smooth;
2) then according to the distribution condition of phosphorus pollution in soil, determining in-situ injection points, wherein the injection depth is greater than the phosphorus pollution depth and preferably kept within the range of 0-6m, because the effect of the range is optimal, and then according to the triangular distribution points, the interval between each point is 1-3m, because the influence radius of the injection points is 1-3 m;
3) then, opening injection equipment into a phosphorus-polluted site, injecting a stabilizing agent into phosphorus-polluted soil through an injection pipe under high pressure, stirring the soil in situ by using a stirring head, stirring to loosen the soil structure and increase the porosity, so that the agent can be uniformly dispersed in the polluted soil by stirring and injecting, and maintaining at normal temperature for 1-7 days after the injection and stirring are finished;
4) and after the final maintenance is finished, excavating all the phosphorus-containing soil by adopting equipment such as an excavator and the like, and then transporting the phosphorus-containing soil to a specified cement plant for cement kiln cooperative treatment.
2. The method for treating high-concentration phosphorus-containing soil according to claim 1, wherein: the stabilizing agent for the high-concentration phosphorus-containing soil comprises the following components in parts by weight:
wherein, the ratio of water: 0.5-1.5% of a drug: 1;
the components of the medicament are as follows:
quicklime-50% -80%;
bentonite-20-30%;
portland cement-5-10%;
when the content of yellow phosphorus in the soil is 3000-10000mg/kg, the dosage is as follows:
dosage- -50-150kg (dry agent)/m3(soil).
3. The method for treating high-concentration phosphorus-containing soil according to claim 1, wherein: when the content of yellow phosphorus in the soil is 3000mg/kg, the dosage of the medicament can be 50kg (dry medicament)/m3(soil), wherein 50-70% of quicklime, 20-25% of bentonite and 5-8% of portland cement are contained.
4. The method for treating high-concentration phosphorus-containing soil according to claim 1, wherein: when the content of yellow phosphorus in soil is 6500mg/kg, the dosage of the medicine can be 100kg (dry medicine)/m3(soil), wherein the quicklime accounts for 65-80%, the bentonite accounts for 25-30%, and the portland cement accounts for 5-7.5%.
5. The method for treating high-concentration phosphorus-containing soil according to claim 1, wherein: when the content of yellow phosphorus in soil is 10000mg/kg, the dosage of the medicine can be 150kg (dry medicine)/m3(soil), wherein 60-80% of quicklime, 20-30% of bentonite and 8-10% of portland cement are contained.
6. The method for treating high-concentration phosphorus-containing soil according to claim 1, wherein: the water can be clean water, or daily life sewage, river water and sewer water, and can not be chemical sewage.
7. The method for treating high-concentration phosphorus-containing soil according to claim 1, wherein: the form of the agent can be selected from liquid or slurry stabilizing agents according to soil layer distribution and soil particle size.
8. The method for treating high-concentration phosphorus-containing soil according to claim 1, wherein: the medicament component is mainly an alkaline medicament.
9. A medicament injection apparatus, characterized by: including automobile body (1), the inside right side fixed connection of automobile body (1) has medicament jar (2), the top left side fixedly connected with host computer (3) of automobile body (1), top fixedly connected with fluid-discharge tube (4) of medicament jar (2), one end bottom fixedly connected with injection tube (5) of keeping away from medicament jar (2) of fluid-discharge tube (4), the bottom of injection tube (5) is rotated and is connected with stirring head (6).
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Cited By (1)
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| CN116116889A (en) * | 2022-12-30 | 2023-05-16 | 杭州科运环境技术有限公司 | In-situ restoration method and movable device for elemental phosphorus polluted soil |
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Denomination of invention: A disposal method for high concentration phosphorus containing soil Granted publication date: 20220920 Pledgee: Guanggu Branch of Wuhan Rural Commercial Bank Co.,Ltd. Pledgor: WUHAN REGEN ENVIRONMENTAL REMEDIATION CO.,LTD. Registration number: Y2024980005648 |
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