CN105642665A - Method for repairing heavy metal contaminated site in situ by adopting stirring and injection system - Google Patents
Method for repairing heavy metal contaminated site in situ by adopting stirring and injection system Download PDFInfo
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- CN105642665A CN105642665A CN201610212864.9A CN201610212864A CN105642665A CN 105642665 A CN105642665 A CN 105642665A CN 201610212864 A CN201610212864 A CN 201610212864A CN 105642665 A CN105642665 A CN 105642665A
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- medicament
- heavy metal
- stirring
- drilling rod
- injecting systems
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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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- Life Sciences & Earth Sciences (AREA)
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to the technical field of repair of heavy metal contaminated sites, and relates to a method for repairing a heavy metal contaminated site in situ by adopting a stirring and injection system. The method comprises steps as follows: a site is leveled; pile locations are arranged to form a diagram; the stirring and injection system is arranged in position; a powdery heavy metal repair agent is added to a supply system; an agent recovery device is started; pre-stirring drilling is performed according to pile location arrangement points; the supply system is started; the agent is injected at designated gas flow into the heavy metal contaminated site and stirred; a drill pipe is lifted after drilling to designated depth, and the agent is injected contentiously and stirred; drilling and stirring steps are repeated according to soil layers and contamination conditions; the agent recovery device is stopped; the drill pipe is moved to next pile position, and the steps from the starting of the agent recovery device to the stopping of the agent recovery device are repeated. The method can effectively realize in-situ repair of the heavy metal contaminated site, is particularly applicable to hard formations and large-depth contamination and is energy-saving and environment-friendly, and the agent mixing effect is good.
Description
Technical field
The invention belongs to environmental geotechnical technical field, particularly to a kind of method adopting stirring injecting systems repairing heavy metal pollution place.
Background technology
The heavy metal pollution situation of China's soil is very severe, shows according to " national Soil Pollution Investigation publication in 2014 ", and the whole nation total exceeding standard rate of soil is 16.1%, and pollution type is based on heavy metal. China's contaminated sites has the features such as pollution range is big, pollution concentration is high, pollutant are complicated, and therefore the reparation of heavy metal contaminated site is imperative. Currently for the mode adopting solidification and stabilization of repairing in heavy metal pollution place, the heavy metal in contaminated soil is solidified by use firming agent, it is prevented that its diffusion brings harm more. In construction, many employing original places showering, excavates by contaminated soil, is transported in specialty prosthetic appliance, add firming agent and also stir, be backfilled to original position after solidification. This kind of construction method cost is high, and efficiency is low, is not suitable for the place that area is big, pollution depth is deep, stratum is hard, and in the contaminated site prior precipitation of needs of not draining, construction complexity. For the disadvantages mentioned above of original place showering, need the In-situ restorative procedure developing a kind of heavy metal pollution place badly.
Summary of the invention
The invention provides a kind of method adopting stirring injecting systems In-situ repairing heavy metal pollution place, this invention is solved the technical problem that to be: how effectively Powdered heavy metal to be repaired medicament and is incorporated into contaminated site according to designing requirement and stirs, realize operation intellectuality, it is to avoid the problems such as the dust pollution of the blocking of work progress, gas leakage, medicament waste and powdered medicament.
The method adopting stirring injecting systems In-situ repairing heavy metal pollution place of the present invention, comprises the following steps:
Step 1) levelling of the land;
Step 2) arrange piling foundation plan: expanded diameter is acm, and in same campshed position, the centre-to-centre spacing of adjacent two stakes is (a-b) cm, wherein b=10-30;In adjacent two campshed positions, two campshed positions adopt quincuncial pile to arrange, and the centre-to-centre spacing of adjacent two campsheds is (a-b) cm;
Step 3) stirring injecting systems in place;
Step 4) in feeding system, add Powdered heavy metal reparation medicament: by forklift, the medicament becoming bag is placed in feeding system terrace at entrance, feeding system can puncture bottom medicine bag 1 automatically, medicament enters feeding system 2 by vibration screen subsequently, after medicament enters feeding system, injection apparatus 4 is entered by transporter 3, injection apparatus 4 is connected with the hollow pipe within drilling rod 7 by pipeline 6, is injected in soil by the spray-hole at drill bit bottom drilling rod 8 place;
Step 5) open medicament retracting device 9: medicament retracting device 9 is installed on rig, near drill bit, can move up and down, by the powdered medicament that negative pressure extraction is emerged from earth's surface, and be filtered reclaiming to medicament by the defecator in medicament retracting device 9;
Step 6) layout according to stake position, pre-stirring is crept into: rig adopts walking base 11, drilling-machine shifter is near stake position, center, drilling rod 7 align piles position is crept into, drilling rod 7 installation position displacement sensor, connect the computerized control system 10 of rig, display in real time pierces the degree of depth, while drilling rod 7 pierces, blade rotates, it is achieved the stirring to soil;
Step 7) open feeding system, contaminated soil to specify throughput to be injected in soil, is repaired by medicament by the spray-hole at drill bit 8 place;
Step 8) pierce designated depth after, drilling rod 7 promotes drilling rod 7 after jet agitation 1min at the bottom of stake, is promoting while drilling rod 7, injects medicament stirring, until spray-hole is promoted to above earth's surface;
Step 9) according to soil layer and pollution condition, repeat step 7)��step 8), it is achieved the Homogeneous phase mixing of medicament and contaminated site;
Step 10) close medicament retracting device 9;
Step 11) drilling rod 7 is moved to next position, repeat step 5)��step 10), until the soil in all piles position is repaired.
Further, according to contaminated place size, concentration distribution of pollutants and the condition such as kind, duration of a project, described stirring injecting systems can adopt single shaft, twin shaft or multiaxis, and wherein single shaft stirring injecting systems is single drilling rod.
Further, described feeding system 2 is moveable integrated structure, is movable near rig, shortens the pipeline distance between feeding system and rig, it is prevented that pipeline blockage and medicament waste.
Further, described injection apparatus 4 pumps into air as power by air compressor, and air pressure is 0.1��0.8MPa.
Further, described feeding system 2 can be automatically injected medicament.
Further, described feeding system 2 can be controlled according to designing requirement by computerized control system 10 and be shown the quality spraying into medicament.
Further, when described medicament retracting device 9 carries out negative pressure extraction, extracting air quantity is 10��15 cubic meters per minute.
Further, the maximum drilling depth of described rig is underground 20m, and penetration rate is 30��150cm/min, and blade rotational speed is 20-30r/min.
Further, described drill bit 8 arranging multiplayer three-dimensional blade.
Further, described spray-hole, in bit blades, along blade multiple spot, is evenly arranged.
The present invention is suitable for the pollution of multiple stratum and different depth, is particularly suited for firm hard formation, the pollution of the big degree of depth, it may be achieved the In-situ reparation in heavy metal pollution place, and medicament good mixing effect is with low cost, energy-conserving and environment-protective, non-secondary pollution. Specifically have the beneficial effect that:
1., by feeding system automatic feed, controlled by computerized control system according to designing requirement and show the quality spraying into medicament, it is achieved intelligentized control method;Additionally, feeding system is removable integrated type structure, pipeline blockage and medicament waste can be prevented.
2. by medicament retracting device, for the characteristic of powder medicine, take negative pressure extraction method, effectively prevent medicament for the pollution of environment and waste.
3., by multilamellar three-dimensional blade and along the particular design such as spray-hole of blade uniform stationing, the mixing efficiency of medicament and contaminated soil can be improved.
4. this invention adapts to the pollution of multiple stratum and different depth, pollutes particularly with the deep layer within hard soil layer and more than 5 meters 20 meters and has a clear superiority in.
5. this invention can carry out normal construction under und rained condition, at the contaminated site that level of ground water is higher, it is not necessary to carry out engineering dewatering in advance.
Accompanying drawing explanation
Fig. 1 is the construction flow chart of the present invention;
Fig. 2 is the stake position schematic diagram of the present invention;
Fig. 3 is the stirring injecting systems schematic diagram of the present invention.
Number in the figure:
1-medicine bag; 2-feeding system; 3-transporter; 4-injection apparatus; 5-feeding system movable base; 6-pipeline; 7-drilling rod; 8-drill bit; 9-medicament retracting device; 10-computerized control system; 11-walking base.
Detailed description of the invention
The present invention, not by the restriction of following embodiment, can determine specific embodiment according to technical scheme and practical situation.
Embodiment 1
Utilize the field conduct scheme that method and system heavy metal contaminated site In-situ of the present invention is repaired as follows:
Step 1) levelling of the land;
Step 2) arrange piling foundation plan: according to contaminated place size, pollutant distribution and the condition such as kind, duration of a project, select single shaft, twin shaft or multi-shaft stirring injecting systems, expanded diameter is 100cm, and in same campshed position, the centre-to-centre spacing of adjacent two stakes is 90cm; In adjacent two campshed positions, two campshed positions adopt quincuncial pile to arrange, and the centre-to-centre spacing of adjacent two campsheds is 90cm, as shown in Figure 1;
Step 3) stirring injecting systems in place;
Step 4) in feeding system, add heavy metal reparation medicament: by forklift, the Powdered heavy metals immobilization agent becoming bag is placed in feeding system terrace at entrance, feeding system can puncture bottom medicine bag automatically, and medicament enters feeding system 2 by vibration screen subsequently. Medicament enters injection apparatus 4 by transporter 3 after entering feeding system, and injection apparatus is connected with the hollow pipe within drilling rod by pipeline 6, is injected in soil by the spray-hole 8 at drill bit place bottom drilling rod 7. Injection apparatus pumps into air as power by air compressor, and air pressure is 0.8MPa; And controlled by computerized control system according to designing requirement and show the quality spraying into medicament; Feeding system is removable integrated type structure 5, is movable near rig, shortens the pipeline distance between feeding system and rig, it is prevented that pipeline blockage and medicament waste;
Step 5) open medicament retracting device: medicament retracting device 9 is fixed on rig, near drill bit, by the powdered medicament that negative pressure extraction is emerged from earth's surface, it extracts air quantity is 15 cubic meters per minute, and is filtered reclaiming to medicament by the defecator in medicament retracting device. Prevent medicament for the pollution of environment and waste;
Step 6) to layout according to stake position, pre-stirring is crept into: rig adopts walking to move 11. Center, drilling rod align piles position, near stake position, is crept into by drilling-machine shifter, drilling rod installation position displacement sensor, and connects the computerized control system 10 of rig, and display in real time pierces the degree of depth, and maximum drilling depth is underground 20m, and penetration rate is 150cm/min;Drill bit arranging multiplayer three-dimensional blade, while drilling rod pierces, blade rotates, and rotating speed is the 20-30r/min stirring realizing to soil;
Step 7) open feeding system, contaminated soil to specify throughput to be injected in soil, is repaired by medicament by the spray-hole at drill bit place. Spray-hole, in bit blades, is evenly arranged along blade;
Step 8) pierce designated depth after, drilling rod promotes drilling rod after jet agitation 1min at the bottom of stake, is also injected simultaneously into medicament stirring promoting in drilling rod process, until spray-hole is promoted to above earth's surface;
Step 9) according to soil layer and pollution condition, repeat step 7)��step 8), it is achieved the Homogeneous phase mixing of medicament and contaminated site; When soil property is harder, during heavy contamination, the number of times that can increase lower brill with carry brill, as adopted four to stir four sprays etc.;
Step 10) close medicament retracting device;
Step 11) drilling rod is moved to next position, repeat step 5)��step 10), until the soil in all piles position is repaired.
Embodiment 2
Utilize the field conduct scheme that method and system heavy metal contaminated site In-situ of the present invention is repaired as follows:
Step 1) levelling of the land;
Step 2) arrange piling foundation plan: according to contaminated place size, pollutant distribution and the condition such as kind, duration of a project, select single shaft, twin shaft or multi-shaft stirring injecting systems, expanded diameter is 100cm, and in same campshed position, the centre-to-centre spacing of adjacent two stakes is 70cm; In adjacent two campshed positions, two campshed positions adopt quincuncial pile to arrange, and the centre-to-centre spacing of adjacent two campsheds is 70cm, as shown in Figure 1;
Step 3) stirring injecting systems in place;
Step 4) in feeding system, add heavy metal reparation medicament: by forklift, the Powdered heavy metals immobilization agent becoming bag is placed in feeding system terrace at entrance, feeding system can puncture bottom medicine bag automatically, and medicament enters feeding system 2 by vibration screen subsequently. Medicament enters injection apparatus 4 by transporter 3 after entering feeding system, and injection apparatus is connected with the hollow pipe within drilling rod by pipeline 6, is injected in soil by the spray-hole 8 at drill bit place bottom drilling rod 7. Injection apparatus pumps into air as power by air compressor, and air pressure is 0.1MPa; And controlled by computerized control system according to designing requirement and show the quality spraying into medicament; Feeding system is removable integrated type structure 5, is movable near rig, shortens the pipeline distance between feeding system and rig, it is prevented that pipeline blockage and medicament waste;
Step 5) open medicament retracting device: medicament retracting device 9 is fixed on rig, near drill bit, by the powdered medicament that negative pressure extraction is emerged from earth's surface, it extracts air quantity is 10 cubic meters per minute, and is filtered reclaiming to medicament by the defecator in medicament retracting device. Prevent medicament for the pollution of environment and waste;
Step 6) to layout according to stake position, pre-stirring is crept into: rig adopts walking to move 11. Center, drilling rod align piles position, near stake position, is crept into by drilling-machine shifter, drilling rod installation position displacement sensor, and connects the computerized control system 10 of rig, and display in real time pierces the degree of depth, and maximum drilling depth is underground 20m, and penetration rate is 30cm/min; Drill bit arranging multiplayer three-dimensional blade, while drilling rod pierces, blade rotates, and rotating speed is the 20-30r/min stirring realizing to soil;
Step 7) open feeding system, contaminated soil to specify throughput to be injected in soil, is repaired by medicament by the spray-hole at drill bit place. Spray-hole, in bit blades, is evenly arranged along blade;
Step 8) pierce designated depth after, drilling rod promotes drilling rod after jet agitation 1min at the bottom of stake, is also injected simultaneously into medicament stirring promoting in drilling rod process, until spray-hole is promoted to above earth's surface;
Step 9) according to soil layer and pollution condition, repeat step 7)��step 8), it is achieved the Homogeneous phase mixing of medicament and contaminated site; When soil property is harder, during heavy contamination, the number of times that can increase lower brill with carry brill, as adopted four to stir four sprays etc.;
Step 10) close medicament retracting device;
Step 11) drilling rod is moved to next position, repeat step 5)��step 10), until the soil in all piles position is repaired.
Claims (10)
1. the method adopting stirring injecting systems In-situ repairing heavy metal pollution place, it is characterised in that comprise the following steps:
Step 1) levelling of the land;
Step 2) arrange piling foundation plan: expanded diameter is acm, and in same campshed position, the centre-to-centre spacing of adjacent two stakes is (a-b) cm, wherein b=10-30; In adjacent two campshed positions, two campshed positions adopt quincuncial pile to arrange, and the centre-to-centre spacing of adjacent two campsheds is (a-b) cm;
Step 3) stirring injecting systems in place;
Step 4) in feeding system, add Powdered heavy metal reparation medicament: by forklift, the medicament becoming bag is placed in feeding system terrace at entrance, feeding system can puncture medicine bag (1) bottom automatically, medicament enters feeding system (2) by vibration screen subsequently, after medicament enters feeding system, injection apparatus (4) is entered by transporter (3), injection apparatus (4) is connected by the hollow pipe that pipeline (6) is internal with drilling rod (7), is injected in soil by the spray-hole at drill bit bottom drilling rod (8) place;
Step 5) open medicament retracting device (9): medicament retracting device (9) is installed on rig, near drill bit, can move up and down, by the powdered medicament that negative pressure extraction is emerged from earth's surface, and it is filtered reclaiming to medicament by the defecator in medicament retracting device (9);
Step 6) layout according to stake position, pre-stirring is crept into: rig adopts walking base (11), drilling-machine shifter is near stake position, center, drilling rod (7) align piles position is crept into, drilling rod (7) installation position displacement sensor, connect the computerized control system (10) of rig, display in real time pierces the degree of depth, while drilling rod (7) pierces, blade rotates, it is achieved the stirring to soil;
Step 7) open feeding system, contaminated soil to specify throughput to be injected in soil, is repaired by medicament by the spray-hole at drill bit (8) place;
Step 8) pierce designated depth after, drilling rod (7) promotes drilling rod (7) after jet agitation 1min at the bottom of stake, while promoting drilling rod (7), injects medicament stirring, until spray-hole is promoted to above earth's surface;
Step 9) according to soil layer and pollution condition, repeat step 7)��step 8), it is achieved the Homogeneous phase mixing of medicament and contaminated site;
Step 10) close medicament retracting device (9);
Step 11) drilling rod (7) is moved to next position, repeat step 5)��step 10), until the soil in all piles position is repaired.
2. a kind of method adopting stirring injecting systems In-situ repairing heavy metal pollution place according to claim 1, it is characterized in that, according to contaminated place size, concentration distribution of pollutants and the condition such as kind, duration of a project, described stirring injecting systems can adopt single shaft, twin shaft or multiaxis, and wherein single shaft stirring injecting systems is single drilling rod.
3. a kind of method adopting stirring injecting systems In-situ repairing heavy metal pollution place according to claim 1, it is characterised in that described feeding system is moveable integrated structure.
4. a kind of method adopting stirring injecting systems In-situ repairing heavy metal pollution place according to claim 3, it is characterized in that, described injection apparatus (4) pumps into air as power by air compressor, and air pressure is 0.1��0.8MPa.
5. a kind of method adopting stirring injecting systems In-situ repairing heavy metal pollution place according to claim 3, it is characterised in that described feeding system can be automatically injected medicament.
6. a kind of method adopting stirring injecting systems In-situ repairing heavy metal pollution place according to claim 3, it is characterized in that, described feeding system can spray into the quality of medicament according to designing requirement by computerized control system (10) control and display.
7. a kind of method adopting stirring injecting systems In-situ repairing heavy metal pollution place according to claim 1, it is characterised in that when described medicament retracting device (9) carries out negative pressure extraction, extracting air quantity is 10��15 cubic meters per minute.
8. a kind of method adopting stirring injecting systems In-situ repairing heavy metal pollution place according to claim 1, it is characterized in that, the maximum drilling depth of described rig is underground 20m, and penetration rate is 30��150cm/min, and blade rotational speed is 20-30r/min.
9. a kind of method adopting stirring injecting systems In-situ repairing heavy metal pollution place according to claim 1, it is characterised in that described drill bit (8) arranging multiplayer three-dimensional blade.
10. a kind of method adopting stirring injecting systems In-situ repairing heavy metal pollution place according to claim 9, it is characterised in that described spray-hole, in bit blades, along blade multiple spot, is evenly arranged.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106140808A (en) * | 2016-08-08 | 2016-11-23 | 北京中岩大地科技股份有限公司 | A kind of method using zonal pressure to inject reparation contaminated site |
| CN109047318A (en) * | 2018-08-29 | 2018-12-21 | 安徽与时环保工程技术有限公司 | The system that a kind of contaminated site injects solid chemicals in situ |
| CN109127698A (en) * | 2018-08-29 | 2019-01-04 | 安徽与时环保工程技术有限公司 | A kind of contaminated site in-situ remediation system |
| CN111250526A (en) * | 2019-12-23 | 2020-06-09 | 北京建工环境修复股份有限公司 | High-pressure jet grouting injection in-situ repair system and method |
| CN111451266A (en) * | 2020-03-14 | 2020-07-28 | 华中师范大学 | Site water and soil cooperative remediation method and device based on iron circulation regulation |
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| CN111250526A (en) * | 2019-12-23 | 2020-06-09 | 北京建工环境修复股份有限公司 | High-pressure jet grouting injection in-situ repair system and method |
| CN111250526B (en) * | 2019-12-23 | 2022-05-13 | 北京建工环境修复股份有限公司 | High-pressure jet grouting injection in-situ repair system and method |
| CN111451266A (en) * | 2020-03-14 | 2020-07-28 | 华中师范大学 | Site water and soil cooperative remediation method and device based on iron circulation regulation |
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Application publication date: 20160608 |