CN109047318B - System for injecting solid medicament into polluted site in situ - Google Patents
System for injecting solid medicament into polluted site in situ Download PDFInfo
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- CN109047318B CN109047318B CN201810994426.1A CN201810994426A CN109047318B CN 109047318 B CN109047318 B CN 109047318B CN 201810994426 A CN201810994426 A CN 201810994426A CN 109047318 B CN109047318 B CN 109047318B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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Abstract
The invention provides a system for injecting solid medicament into a polluted site in situ, which comprises a mobile platform (1), a drill bit system (2) and a solid medicament injection system (3); wherein the moving platform comprises a rigid support (11) through which the drill bit system is supported and controlled to move up and down; the drill bit system comprises a drill bit (21) and a hollow rod (22) extending upwardly along the drill bit; the solid medicament injection system (3) comprises a high-pressure air compressor, a medium-pressure air compressor (32) and a feed port (33), wherein the medium-pressure air compressor and the feed port (33) are positioned at the lower side of the hollow rod (22), and the medium-pressure air compressor (32) feeds the solid medicament entering from the feed port (33) into the hollow rod; the high-pressure air compressor (31) is located on the upper side of the hollow rod and used for feeding the solid medicament into the drill bit. According to the method and the device, each process parameter can be conveniently adjusted, and the complex polluted site can be efficiently repaired in an energy-saving manner.
Description
Technical Field
The invention relates to the technical field of environment, in particular to a system for injecting a solid medicament into a polluted site in situ.
Background
After 30 years of rapid industrial development, a large amount of pollutants enter soil and underground water through ways of solid waste stacking and dumping, sewage leakage, atmospheric sedimentation and the like, so that a large amount of chemical pollution plots are generated. The chemical pollution plots are largely included in the scope of re-development and utilization along with the planning of urbanization development. The pollution depth of part of chemical polluted plots is deep and reaches below 15 meters below the ground, so that the chemical polluted plots are not suitable for being repaired by adopting an excavation-treatment mode. A number of in situ remediation techniques are used for contaminated sites with deep contamination depths, such as in situ oxidation techniques, multiphase extraction techniques, air aeration techniques, and in situ heating techniques.
Land resources are the fundamental resources upon which humans live. In 2014, the national soil condition survey bulletin indicates that the national soil environment condition is not optimistic overall, the soil pollution in partial regions is serious, the quality of the cultivated land soil environment is great, and the soil environment problem of the industrial and mining waste land is prominent. With the implementation of urban development strategies such as 'two-step-back-to-three', 'city-back-to-park' and 'industry transfer', a large number of enterprises are closed and moved, a large number of industrial pollution sites are left, and risk assessment and restoration treatment are urgently to be developed.
At present, the polluted site remediation mainly focuses on in-situ remediation technologies, which mainly comprise in-situ oxidation, in-situ thermal desorption, in-situ stabilization/solidification, in-situ microbial remediation, Air scattering, multiphase extraction, extraction-treatment, PRB (physical resource block), biological attenuation strengthening and other technologies, wherein the in-situ oxidation, in-situ reduction, in-situ stabilization/solidification, PRB, in-situ microbial remediation and other technologies all involve the injection of medicaments, nutritional medicaments and/or microbial agents into a certain depth range of a polluted site. Generally, considering the convenience of injection implementation, injected medicaments, nutritional medicaments and/or microbial agents are all liquid medicaments, only PRB (plant resource block) needs to be set as a solid reaction wall, and engineering implementation needs to dig a groove by using a digging machine and then fill a permeable medium mixed with a certain medicament again to build the permeable reaction wall. The use of excavators to dig trenches for PRB has several difficulties, firstly the width of the trench excavated by the excavator is limited, and secondly the depth of the trench excavated by the excavator is very difficult to achieve at a greater depth.
For heavy metal polluted sites, stabilizing agents are commonly used for stabilizing, and the commonly used stabilizing agents are all mineral substances which are not easy to dissolve in water, such as attapulgite, phosphate, polyhydroxy phosphate, iron ore, lime and the like. Conventional liquid drug infusion methods and systems are no longer suitable for infusing such solid drugs, and new systems for in situ infusion of solid drugs need to be explored.
If common oxidation medicaments such as permanganate and persulfate can be effectively injected into a polluted site in a solid mode, the use process of the oxidation medicaments is safer (the transportation, storage and injection of liquid oxidation medicaments have great potential safety hazards), the use efficiency can also be greatly improved, and meanwhile, the improvement of the repair efficiency and the shortening of the repair period can be caused. If part of chemical reducing agents, such as calcium polysulfide, pyrosulfate, ferrous salt and the like, can be directly injected into a polluted site in a solid state to play a role in reducing, the injection efficiency can also be greatly improved, the use efficiency of the agent is improved, and the overall repair efficiency is improved.
The same is true for in situ microbial remediation: the solid microbial inoculum and the solid nutrient carbon source are directly and effectively injected, so that the repair construction process can be greatly simplified, and the repair efficiency can be improved.
Disclosure of Invention
In order to solve the technical defects, the system for injecting the solid medicament into the polluted site in situ is designed, so that a plurality of problems in the in-situ medicament injection process and the PRB construction process can be solved, and the injected solid medicament can play a better repairing role.
The invention provides a system for injecting solid medicament into a polluted site in situ, which comprises a mobile platform 1, a drill bit system 2 and a solid medicament injection system 3; wherein, the mobile platform 1 comprises a rigid support 11, and the drill bit system 2 is supported and controlled to move up and down through the rigid support 11; the drill bit system 2 comprises a drill bit 21 and a hollow rod 22 extending upwards along the drill bit 21; the solid chemical injection system 3 comprises a high-pressure air compressor 31, an intermediate-pressure air compressor 32 and a feed port 33, wherein the intermediate-pressure air compressor 32 and the feed port 33 are positioned at the lower side of the hollow rod 22, and the intermediate-pressure air compressor 32 feeds the solid chemical entering from the feed port 33 into the hollow rod 22; the high pressure air compressor 31 is located on the upper side of the hollow rod 22 and is used for feeding the solid medicament into the drill bit 21.
Preferably, the drill 21 is a hollow cavity structure, and a plurality of holes 12 are opened on a side surface of the drill 21.
Preferably, a high-pressure nozzle is installed inside each hole 12, and the high-pressure nozzle is connected with an external high-pressure air bag through a hose.
Preferably, a partition plate 23 is installed in the hollow rod 22 near one side of the drill bit 21, the partition plate 23 separates the hollow section of the hollow rod 22 into a plurality of holes, and the number of the holes is consistent with the number of the holes 12.
Preferably, the holes extend a distance down along the partition plate 23, and the holes are connected to the holes 12 through hoses, respectively.
Preferably, the inner diameter of the cavity is 1-60 cm; the diameter of the drill bit 21 is 0.3-3 m, and the thickness is 0.01-0.2 m; the holes are spaced at 1-6 cm intervals and have a diameter of 0.8 cm.
Preferably, a groove is formed in the side surface of the drill bit 21, and the plurality of holes 12 are embedded in the groove.
Preferably, the system also comprises a tail gas collecting system 4 and a tail gas processing system 5, wherein the tail gas collecting system 4 extracts and collects the polluted gas through a pipeline, then the polluted gas enters the tail gas processing system 5, and the polluted gas is discharged after being processed by the tail gas processing system 5.
Preferably, a pressure sensor is arranged on the periphery of the hole, and when the value of the pressure sensor meets a preset value, the high-pressure nozzle is started to spray air.
Compared with the prior art, the scheme of the embodiment of the invention at least has the following beneficial effects:
(1) the in-situ solid medicament injection equipment system can quickly and freely adjust the medicament injection depth, and the maximum depth can reach 30 meters;
(2) the drill bit related to the in-situ solid medicament injection equipment system can be freely converted according to different stratum structures, 3 different drill bit choices are provided, and the drill bit can be respectively suitable for clay stratum, sandy soil stratum and loam soil stratum;
(3) the solid medicament conveying related to the in-situ injection solid medicament equipment system is conveyed in a pneumatic conveying mode, so that the conveying speed and the conveying amount can be effectively adjusted;
(4) the solid medicament injection device system for in-situ injection of the solid medicament adopts a high-pressure air compressor as injection power;
(5) the tail end of the solid medicament injection related to the in-situ solid medicament injection equipment system is injected by adopting a high-pressure spray head (the size of a spray nozzle is adjustable), so that the injected medicament can be effectively prevented from being blocked in a conveying and injection pipeline;
(6) pressure probes are arranged on high-pressure nozzles at the injection tail end of the solid medicament related to the in-situ solid medicament injection equipment system, so that the pressure is monitored constantly, and when the blockage occurs due to overhigh pressure, the high pressure is adjusted, the blocked nozzles are purged, and the blockage is eliminated;
(7) the solid medicament which can be injected by the in-situ solid medicament injection equipment system can be solid in a particle form or solid in a powder form;
(8) the in-situ solid medicament injection equipment system can quickly and effectively mix the solid medicament into the polluted area, and realizes the efficient and economic remediation goal;
(9) the application the solid medicament that normal position injection solid medicament equipment system can inject can be fast, effectively mix the solid medicament to the contaminated area in, form the reaction zone of effectual pollution feather low reaches, replace PRB, avoid building various difficulties that PRB met.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic diagram of a system for injecting solid pharmaceutical agents into a contaminated site in situ according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a drill bit of the system for injecting solid medicament into a contaminated site in situ according to the embodiment of the invention.
Description of reference numerals: 1, moving a platform; 2, a drill bit system; 3 a solid medicament injection system; 4, a tail gas collecting system; 5, a tail gas treatment system; 11 a rigid support; 12 holes; a 21 drill bit; 22 a hollow stem; 31 a high pressure air compressor; 32 a medium pressure air compressor; 33 a feed inlet; 23 a partition.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, third, etc. may be used to describe … … in embodiments of the present invention, these … … should not be limited to these terms. These terms are used only to distinguish … …. For example, the first … … can also be referred to as the second … … and similarly the second … … can also be referred to as the first … … without departing from the scope of embodiments of the present invention.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides a system for injecting solid chemicals into a contaminated site in situ, comprising a mobile platform 1, a drill system 2, and a solid chemical injection system 3; wherein, the mobile platform 1 comprises a rigid support 11, and the drill bit system 2 is supported and controlled to move up and down through the rigid support 11; the drill bit system 2 comprises a drill bit 21 and a hollow rod 22 extending upwards along the drill bit 21; the solid chemical injection system 3 comprises a high-pressure air compressor 31, an intermediate-pressure air compressor 32 and a feed port 33, wherein the intermediate-pressure air compressor 32 and the feed port 33 are positioned at the lower side of the hollow rod 22, and the intermediate-pressure air compressor 32 feeds the solid chemical entering from the feed port 33 into the hollow rod 22; the high pressure air compressor 31 is located on the upper side of the hollow rod 22 and is used for feeding the solid medicament into the drill bit 21.
Specifically, among the solid medicament system of pouring into that figure 1 shows, moving platform 1 is the crawler-type structure, conveniently removes in unevenness's place, and support frame 11 can freely go up and down in moving platform 1, and high rising is fixed after predetermined height as required, reciprocates through the connection control drill bit of iron chain. The high-pressure air compressor 13 provides enough aerodynamic force, and air with enough pressure is blown into the hollow drill rod; the hollow drill pipe 22 is provided with a gas pressure and gas flow monitoring and control system, and the condition of the blown gas can be fed back and adjusted in real time. The medium pressure air compressor 32 is connected with the feed opening 33 in series, and after a large amount of medicament enters the conveying system from the feed opening 33, the medium pressure air compressor 32 is started, and the medicament is blown into the hollow rod. And a partition plate 23 is arranged at the joint of the hollow drill bit, and the medicament is injected into the drill bit from a hole of the partition plate.
Preferably, the drill 21 is a hollow cavity structure, and a plurality of holes 12 are opened on a side surface of the drill 21. The number of the holes is preferably 2 to 15, more preferably 10 to 12.
Particularly preferably, a high-pressure nozzle is arranged inside each hole 12, and the high-pressure nozzle is connected with an external high-pressure air bag through a hose. When the medicament cannot be blown out from the small hole 12, the medicament can block the small hole, or the soil can block the small hole, and then high-pressure gas can be blown through the high-pressure nozzle, so that the small hole is unobstructed. Preferably, a pressure sensor is arranged on the periphery of the hole, and when the value of the pressure sensor meets a preset value, the high-pressure nozzle is started to spray air.
As shown in fig. 2, it is preferable that a partition plate 23 is installed inside the hollow rod 22 at a side close to the drill 21, and the partition plate 23 divides the hollow section of the hollow rod 22 into a plurality of holes, the number of the holes corresponding to the number of the holes 12. In particular, said holes extend a distance down along said partition 23, said holes being connected to said holes 12 by means of hoses, respectively, which are connected to the walls of the holes extending downwards.
As shown in fig. 2, in order to smoothly inject the solid medicament into the soil, it is preferable that the inner diameter of the cavity is 1-60 cm; the drill bit 21 is cylindrical, the diameter is 0.3-3 m, and the thickness is 0.01-0.2 m; the holes are spaced at 1-6 cm intervals and have a diameter of 0.8 cm.
Preferably, a groove is formed in the side surface of the drill bit 21, and the plurality of holes 12 are embedded in the groove. This configuration is advantageous in preventing soil from clogging the apertures 12.
Preferably, the system also comprises a tail gas collecting system 4 and a tail gas processing system 5, wherein the tail gas collecting system 4 extracts and collects the polluted gas through a pipeline, then the polluted gas enters the tail gas processing system 5, and the polluted gas is discharged after being processed by the tail gas processing system 5.
When the device is used, firstly, a closed space which is about 20cm higher than the ground is placed on a set point of a polluted site and compacted to prevent injected medicaments from splashing out of the ground. The drill bit 21 is then activated to mix the soil and the injection system. And feeding solid medicament to a feed opening 33, starting a medium-pressure air compressor 32, conveying the solid medicament to the hollow drill rod through pneumatic conveying, simultaneously starting a high-pressure air compressor 31, conveying the solid medicament in the hollow drill rod to a separation plate 23 at the joint of the hollow drill bit 21 and the hollow drill rod by high-pressure air pressure, wherein solid particle airflow is uniformly distributed into 12 hoses and is ready to be continuously conveyed to a medicament injection hole 12 on the side surface of the drill bit connected with a high-pressure nozzle. Therefore, the solid medicament can be uniformly mixed into the polluted soil while the soil is stirred by the drill bit. A pressure and flow rate monitoring and control system of high-pressure air flow is arranged in the hollow drill rod and used for monitoring the high-pressure air flow and ensuring that the high-pressure air flow can effectively convey the solid medicament to the soil. Meanwhile, each medicine injection hole 12 is provided with a high-pressure nozzle, each high-pressure nozzle is provided with a pressure sensor for monitoring the pressure of the air flow, and when the pressure of the air flow is too high, the nozzle is blocked, and an additional high-pressure injection system needs to be started to eliminate the blocked injection. The solid medicament can be effectively mixed in the area by drilling the drill rod down to 30 meters below the ground. And after the injection of the medicament is finished, the medicament injection system is closed, and the drill bit is turned over to the ground. Thus, one injection is completed. And moving the mobile platform 1 to the next point position, and starting the medicine injection process again. The above steps are repeated, and after the medicines are injected at a plurality of positions, the expected repairing effect of the polluted site can be realized. It is emphasized that the injection is completed in about 10-30 minutes and the efficiency of the injection is extremely high.
It is also envisioned that the drug injection system of the present invention may be used for injecting not only solid drugs but also liquid drugs, and is not particularly limited thereto.
Compared with the prior art, the scheme of the embodiment of the invention at least has the following beneficial effects:
(1) the in-situ solid medicament injection equipment system can quickly and freely adjust the medicament injection depth, and the maximum depth can reach 30 meters;
(2) the drill bit related to the in-situ solid medicament injection equipment system can be freely converted according to different stratum structures, 3 different drill bit choices are provided, and the drill bit can be respectively suitable for clay stratum, sandy soil stratum and loam soil stratum;
(3) the solid medicament conveying related to the in-situ injection solid medicament equipment system is conveyed in a pneumatic conveying mode, so that the conveying speed and the conveying amount can be effectively adjusted;
(4) the solid medicament injection device system for in-situ injection of the solid medicament adopts a high-pressure air compressor as injection power;
(5) the tail end of the solid medicament injection related to the in-situ solid medicament injection equipment system is injected by adopting a high-pressure spray head (the size of a spray nozzle is adjustable), so that the injected medicament can be effectively prevented from being blocked in a conveying and injection pipeline;
(6) pressure probes are arranged on high-pressure nozzles at the injection tail end of the solid medicament related to the in-situ solid medicament injection equipment system, so that the pressure is monitored constantly, and when the blockage occurs due to overhigh pressure, the high pressure is adjusted, the blocked nozzles are purged, and the blockage is eliminated;
(7) the solid medicament which can be injected by the in-situ solid medicament injection equipment system can be solid in a particle form or solid in a powder form;
(8) the in-situ solid medicament injection equipment system can quickly and effectively mix the solid medicament into the polluted area, and realizes the efficient and economic remediation goal;
(9) the application the solid medicament that normal position injection solid medicament equipment system can inject can be fast, effectively mix the solid medicament to the contaminated area in, form the reaction zone of effectual pollution feather low reaches, replace PRB, avoid building various difficulties that PRB met.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. The utility model provides a system for injecting solid medicament in situ in contaminated site which characterized in that: comprises a mobile platform (1), a drill bit system (2) and a solid medicament injection system (3);
wherein the mobile platform (1) comprises a rigid support (11), and the drill bit system (2) is supported and controlled to move up and down through the rigid support (11);
the drill bit system (2) comprises a drill bit (21) and a hollow rod (22) extending upwards along the drill bit (21);
the solid medicament injection system (3) comprises a high-pressure air compressor (31), a medium-pressure air compressor (32) and a feed port (33), wherein the medium-pressure air compressor (32) and the feed port (33) are positioned at the lower side of the hollow rod (22), and the medium-pressure air compressor (32) feeds the solid medicament entering from the feed port (33) into the hollow rod (22); the high-pressure air compressor (31) is positioned on the upper side of the hollow rod (22) and is used for feeding the solid medicament into the drill bit (21);
the drill bit (21) is of a hollow cavity type structure, and a plurality of holes (12) are formed in the side surface of the drill bit (21);
the inner sides of the holes (12) are respectively provided with a high-pressure nozzle, and the high-pressure nozzles are connected with an external high-pressure air bag through hoses;
be close to drill bit (21) one side in cavity pole (22) and install division board (23), division board (23) will the cavity cross-section of cavity pole (22) is separated for a plurality of holes, the hole quantity with hole (12) are unanimous.
2. System according to claim 1, characterized in that said holes extend a distance down along said partition plate (23), said holes being connected to said holes (12) by means of hoses, respectively.
3. The system of claim 1, wherein the cavity interior diameter is 1-60 centimeters; the diameter of the drill bit (21) is 0.3-3 m, and the thickness of the drill bit is 0.01-0.2 m; the holes are spaced at 1-6 cm intervals and have a diameter of 0.8 cm.
4. The system according to claim 1, characterized in that the drill bit (21) is provided with a groove on the side, and the plurality of holes (12) are embedded in the groove.
5. The system of claim 1, wherein: the device is characterized by further comprising a tail gas collecting system (4) and a tail gas processing system (5), wherein the tail gas collecting system (4) extracts and collects pollution gas through a pipeline, then the pollution gas enters the tail gas processing system (5), and is discharged after being processed by the tail gas processing system (5).
6. The system of claim 1, wherein: and pressure sensors are arranged on the periphery of the hole (12), and when the values of the pressure sensors meet preset values, the high-pressure nozzle is started to spray air.
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| CN110038895A (en) * | 2019-04-25 | 2019-07-23 | 山东省农业科学院畜牧兽医研究所 | A kind of continuance lifting formula perfusion microbial bacterial agent solidifies the automation equipment and method of tailing |
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| AU6328998A (en) * | 1998-02-19 | 1999-09-06 | Richard P. Murray | Method and apparatus for removing chlorinated contaminants from soil |
| CN205732267U (en) * | 2016-01-29 | 2016-11-30 | 武汉都市环保工程技术股份有限公司 | The in-situ remediation system of portable contaminated soil |
| CN105642665A (en) * | 2016-04-07 | 2016-06-08 | 北京中岩大地科技股份有限公司 | Method for repairing heavy metal contaminated site in situ by adopting stirring and injection system |
| CN205719868U (en) * | 2016-06-23 | 2016-11-23 | 北京建工环境修复股份有限公司 | Contaminated soil and subsoil water inject in situ repairs the pilot system that dilation angle determines |
| CN207013441U (en) * | 2017-03-07 | 2018-02-16 | 吉林大学 | Comprehensive restoration system for polluted site |
| CN106734178A (en) * | 2017-03-07 | 2017-05-31 | 吉林大学 | Comprehensive restoration system and method for polluted site |
| CN107096793A (en) * | 2017-06-21 | 2017-08-29 | 南京贻润环境科技有限公司 | It is a kind of to be used for the high-pressure injection boring rod set of in-situ immobilization soil and underground water pollution |
| CN207463808U (en) * | 2017-10-30 | 2018-06-08 | 武汉都市环保工程技术股份有限公司 | A kind of contaminated site is rapidly injected repair system in situ |
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