CN214184573U - Integrated system for reinforcing microorganism to restore organic polluted soil and underground water - Google Patents
Integrated system for reinforcing microorganism to restore organic polluted soil and underground water Download PDFInfo
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- CN214184573U CN214184573U CN202022825379.3U CN202022825379U CN214184573U CN 214184573 U CN214184573 U CN 214184573U CN 202022825379 U CN202022825379 U CN 202022825379U CN 214184573 U CN214184573 U CN 214184573U
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Abstract
The utility model provides an integrated system for strengthening the microbial remediation of organic contaminated soil and underground water, which comprises a separation device wrapped at the top of the soil to be treated, a plurality of injection wells, a plurality of aeration wells and a plurality of breathable horizontal extraction pipes, wherein the plurality of aeration wells and the plurality of horizontal extraction pipes are communicated through pipelines; a heat transfer pipe is arranged in the injection well. The integrated system for strengthening the microbial remediation of the organically-polluted soil and the underground water organically combines an aeration system, a vapor extraction system and an injection system, reasonably utilizes the air pressure difference in the system, realizes the aeration-extraction vapor circulation in the separation system, leads gas to be transferred from a high-pressure area to a low-pressure area by a heat transfer pipe, provides an aerobic and constant-temperature environment for the microbes, increases the opportunity of fully contacting the pollutants with the microbes, promotes the flow of the pollutants in the soil and the underground water, thereby improving the microbial degradation efficiency, and further realizing the integrated remediation of the soil and the underground water pollution.
Description
Technical Field
The utility model relates to a soil remediation technical field especially relates to an integrated system of strengthening microbial remediation organic contaminated soil and groundwater.
Background
The in-situ bioremediation technology is a soil remediation technology which is green, environment-friendly and widely applied, mainly utilizes the advantages of small volume, high propagation speed, strong metabolic capability, strong adaptability, easy culture and the like of microorganisms, and can effectively remove pollutants through the principles of adsorption, enrichment, degradation, dissolution, precipitation, redox and the like.
The in-situ biotechnology can be simultaneously suitable for heavy metal and organic polluted sites, and has made many breakthroughs in repairing the heavy metal cadmium and lead polluted sites. In addition, the composite material also has good repairing effect on petroleum hydrocarbon organic pollutants.
The in-situ bioremediation technology comprises modes of a bacterium feeding method, biological ventilation, a biological culture method and the like, but the in-situ bioremediation technology has obvious problems. For example, the colony repairing pollutant period is long, the temperature and the pH have obvious influence on the colony repairing pollutant, and the method is more suitable for medium-low concentration polluted soil and the like.
The bacteria feeding method is to utilize the degrading and metabolizing capacity of microbes to directly insert exogenous pollutant degrading bacteria into polluted soil and provide nutrients for the microbes to grow. The technology has the characteristics of easy operation and low cost, but also has the problems of sensitivity to the surrounding environment and low survival rate.
The biological ventilation method is a method for improving the degradation capability of microorganisms by injecting air or oxygen into an unsaturated zone, adding nutrients and inoculating specific engineering bacteria. The method is suitable for treating organic pollutants in unsaturated regions, and has the advantages of wide application range and low cost.
The biological culture method is a method for improving the activity of original degrading bacteria in soil by periodically adding hydrogen peroxide and nutrients into the soil and converting soil pollutants by utilizing the metabolic function of the degrading bacteria. At present, the research process is slow, the force is small, and no large-scale engineering project is implemented.
Disclosure of Invention
In view of this, the utility model aims at overcoming the defect that exists among the above-mentioned prior art, provide an integrated system of strengthening microbial remediation organic contaminated soil and groundwater, for solving normal position microbial remediation organic contaminated soil and groundwater cycle length, oxygen supply volume is not enough, the reaction is insufficient and living environment temperature hangs down the scheduling problem and improve the repair efficiency, form one set of green, restore high efficiency and the suitable normal position microbial remediation system of living environment.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
an integrated system for strengthening microbial remediation of organic contaminated soil and underground water comprises a blocking device wrapped at the top of soil to be treated, and a plurality of injection wells, a plurality of aeration wells and a plurality of air-permeable horizontal extraction pipes which are positioned in the blocking device, wherein the aeration wells and the horizontal extraction pipes are communicated through pipelines;
an injection pipe is arranged in the injection well, a plurality of injectors are communicated with the injection pipe and are respectively positioned in the injection well and underground water, and a heat transfer pipe is arranged in the injection well;
the aeration well is internally provided with a steel shaft, the bottom of the steel shaft is provided with an aerator, the middle of the steel shaft is provided with a telescopic device, and the aerator is driven by the telescopic device to submerge or lift in underground water.
Furthermore, the injector is a cylindrical annular cylinder, the middle part of the injector is a through infusion tube, two ends of the infusion tube are communicated with the injection tube, and the side wall of the injector is provided with a plurality of nozzles.
Further, the nozzle comprises a plurality of straight-flow nozzles and rotary nozzles which are distributed at intervals from top to bottom.
Furthermore, a plurality of injection wells and aeration wells are arranged in a regular triangle or regular hexagon staggered mode, and the arrangement distance between the aeration wells and the injection wells is 1.0-3.0 m.
Further, the horizontal extraction pipes are arranged in parallel and are positioned in the middle of the adjacent injection wells;
the two ends of the parallel horizontal extraction pipes are communicated through horizontal connecting pipes, and vertical extraction pipes extending out of the separation devices are arranged on the two horizontal connecting pipes.
Further, the number ratio of the horizontal extraction pipes to the aeration wells is 1: 1-1: 2.
Furthermore, the expansion piece is a closed cylindrical cylinder, and the top of the expansion piece is communicated with the steel shaft;
a sliding cylinder is arranged in the expansion piece, the top of the sliding cylinder is provided with an opening, the bottom of the sliding cylinder is communicated with a gas pipe, the inner diameter of the gas pipe is smaller than that of the steel shaft, and a pressure reducing valve is arranged on the gas pipe;
the gas transmission pipe is inserted in the bottom of the expansion piece in a sliding mode, the bottom end of the gas transmission pipe is fixedly connected with the steel shaft, and a compression spring is sleeved on the periphery of the gas transmission pipe.
Further, the aerator is the confined tube-shape thing, the inside cavity of aerator, a plurality of micropores have been laid on the surface of aerator, and micropore density is 10000 ~ 15000 per square meter.
Furthermore, the horizontal extraction pipe is formed by enclosing a stainless steel screen mesh, and the stainless steel screen mesh is a 100-mesh screen mesh.
Furthermore, the separation device includes that enclose into the vertical barrier layer of tube-shape and the horizontal barrier layer that is located the tube-shape opening part of tube-shape, horizontal barrier layer uses SAM-921 wet paving method alternately lamination polyethylene film and concrete layer to constitute, the perpendicular barrier layer is the stagnant water curtain that concrete placement was poured out.
Compared with the prior art, the beneficial effects of the utility model are that:
the integrated system for strengthening the microbial remediation of the organically-polluted soil and the underground water organically combines an aeration system, a vapor extraction system and an injection system, reasonably utilizes the air pressure difference in the system, realizes the aeration-extraction vapor circulation in the separation system, leads the gas to be transferred from a high-pressure area to a low-pressure area by a heat transfer pipe, provides an aerobic and constant-temperature environment for the microbes, increases the opportunity of fully contacting the pollutants with the microbes, promotes the flow of the pollutants in the soil and the underground water, thereby improving the microbial degradation efficiency, and further realizing the integrated remediation of the soil and the underground water pollution.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
FIG. 1 is a schematic view of the overall structure of an integrated system for enhanced microbial remediation of organically-polluted soil and groundwater according to the present invention;
FIG. 2 is a schematic view of the overall structure of an integrated system expander for enhancing the microbial remediation of organic contaminated soil and groundwater according to the present invention;
FIG. 3 is a schematic diagram of the overall structure of the integrated system injector for enhancing the microbial remediation of organic contaminated soil and groundwater according to the present invention.
Description of reference numerals:
1-a telescopic device; 2-an aerator; 3-a steel wellbore; 4-heat transfer tubes; 5-a syringe; 6-horizontal extraction tube; 7-a gas phase monitor; 8-an air compressor; 9-a gas storage tank; 10-a batching box; 11-a horizontal barrier layer; 12-a vertical barrier layer; 13-a power supply and distribution system; 14-an injection tube; 15-horizontal connecting pipe; 16-a vertical extraction tube; 17-a slide cylinder; 18-an extraction pump; 19-a pressure relief valve; 20-straight flow nozzle; 21-a rotary spray nozzle; 22-a compression spring; 23-infusion tube.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The invention will be described in detail with reference to the following examples with reference to the accompanying drawings:
as shown in fig. 1-3, an integrated system for enhancing the microbial remediation of organic contaminated soil and underground water comprises a blocking device wrapped on the top of soil to be treated, and a plurality of injection wells, a plurality of aeration wells and a plurality of horizontal extraction pipes 6 which are positioned in the blocking device;
an injection pipe 14 is arranged in the injection well, two injectors 5 are arranged on the injection pipe 14 and are respectively positioned in the injection well and underground water and used for conveying a microbial inoculum and a nutrient solution to the polluted soil and the underground water, and a spiral heat transfer pipe 4 is wound on the periphery of the injection pipe 14;
the aerator 2 conveys gas into the system, the horizontal extraction pipes 6 extract gas outwards, and the plurality of aeration wells and the plurality of horizontal extraction pipes 6 are communicated through pipelines, so that the gas carrying pollutants forms circulation;
the two ends of the parallel horizontal extraction pipes 6 are communicated through horizontal connecting pipes 15, vertical extraction pipes 16 extending out of the blocking device are arranged on the two horizontal connecting pipes 15, wherein the vertical extraction pipe 16 at the front end is directly communicated with an air inlet pipe of an extraction pump 18, an outlet pipe of the extraction pump 18 is sequentially connected with an air compressor 8, an air storage tank 9 and a refrigerator, an automatic air inlet valve is arranged at the outlet of the refrigerator and is communicated with an aeration air inlet pipe, the air of the air compressor 8 comes from two parts of air and gas phase extraction gas, and the ratio of the air to the gas phase extraction gas is kept at about 20% -40% and 60% -80%;
the refrigerating machine is used for cooling the gas, so that the gas exposed by the aerator 2 is cold gas, the temperature difference between the aerator 2 and the heating pipe is enlarged, the cold and hot convection is accelerated, and the gas circulation efficiency is increased;
under the action of the heat transfer pipe 4, part of volatile pollutants carried by cold air exposed by the aerator 2 move to a low-pressure area near the heat transfer pipe 4, the pollutants carried by the pollutants are degraded by microorganisms or decomposed by heat to be converted into hot air to move upwards, and finally the hot air is pumped out by the horizontal gas phase extraction pipe, enters the air compressor 8 again and is pumped into the aeration system, and the organic pollutants are rapidly degraded by the reciprocating circulation;
the vertical extraction pipe 16 at the tail end has three purposes, wherein one purpose is that the flow velocity, the flow and the pressure of gas in the pipe can be monitored in real time by utilizing the pressure difference change in the gas phase extraction pipe, the second purpose is that a gas phase sample is collected and whether the standard requirement is met is detected, and the third purpose is that oxidants such as ozone, sodium persulfate and the like are added to degrade pollutants which are difficult to treat;
in order to ensure that the whole restoration area can uniformly reach the required temperature and ensure that the gas in the system can be comprehensively circulated, a plurality of injection wells and aeration wells are arranged in a regular triangle or regular hexagon staggered mode, the arrangement distance between the aeration wells and the injection wells is 1.0-3.0 m, and the number ratio of the horizontal extraction pipes 6 to the aeration wells is 1: 1-1: 2;
the horizontal extraction pipes 6 are arranged in parallel and are arranged in the middle of the adjacent injection wells, and the burying depth is at least below the pollution depth of 0.5 m;
the separation device is used for separating a polluted area to form a closed environment, and comprises a vertical separation layer 12 and a horizontal separation layer 11, wherein the vertical separation layer 12 is arranged in a cylindrical shape in a surrounding mode, the horizontal separation layer 11 is located at the opening of the cylindrical shape and consists of a polyethylene film and a concrete layer which are laminated in a crossed mode through a SAM-921 wet paving method and used for maintaining the pressure in the system, a layer of concrete is paved on a soil leveling layer, the thickness of the concrete layer is 100mm, finally, the upper layer of the concrete layer is paved through a polyethylene film crossed layer, the thickness of the concrete layer is 50mm, and the vertical separation layer 12 is a waterproof curtain poured by the concrete and used as system protection;
in order to improve the injection efficiency and range, the injector 5 is a cylindrical annular cylinder, the middle part of the injector 5 is a through infusion tube 23, two ends of the infusion tube 23 are communicated with the injection tube 14, and the side wall of the injector 5 is provided with a plurality of nozzles;
the nozzle comprises a plurality of straight-flow nozzles 20 and rotary nozzles which are distributed at intervals from top to bottom, wherein an injector 5 in an injection well injects microorganisms into a polluted soil layer in a hydraulic fracturing mode to improve the injection distance, the rotary nozzles are used for expanding the injection range, and the injector 5 in underground water sprays microbial inoculum and nutrient solution under the action of gravity and forward pressure;
in order to ensure the constant temperature environment of the microbial inoculum around the injector 5, the periphery of the injection tube 14 and the injector 5 is wound with a spiral heat transfer tube 4, the heat transfer tube 4 generates heat by an indirect resistance heating method, and the heat transfer temperature and the temperature condition can be monitored by a thermistor in the working process;
the aeration well is used for conveying gas into the system, a steel shaft 3 is arranged in the aeration well, in order to increase the aeration uniformity, an aerator 2 is arranged at the bottom of the steel shaft 3, the aerator 2 is a closed cylindrical object, the inside of the aerator 2 is hollow and is made of 304 stainless steel with the thickness of 0.15-0.4 mm, a plurality of micropores are distributed on the surface of the aerator 2, and the density of the micropores is 10000-15000 per square meter;
the middle part of the steel shaft 3 is provided with an expansion piece 1, the expansion piece 1 is a closed columnar cylinder, the top of the expansion piece 1 is communicated with the steel shaft 3, a sliding cylinder 17 is arranged in the expansion piece 1, the top of the sliding cylinder 17 is an opening, the bottom of the sliding cylinder 17 is communicated with a gas pipe, the gas pipe is inserted into the bottom of the expansion piece 1 in a sliding manner, the bottom end of the gas pipe is fixedly connected with the steel shaft 3, and the periphery of the gas pipe is sleeved with a compression spring 22;
in order to reduce pressure loss and ensure the air injection strength of the aerator 2, the inner diameter of the air delivery pipe is smaller than that of the steel shaft 3, the air delivery pipe and the upper sliding cylinder 17 and the lower steel shaft 3 thereof form a Venturi tube-like structure, and a pressure reducing valve 19 is arranged on the air delivery pipe and used for controlling the opening and closing of the air delivery pipe;
the working process of the expansion piece 1 is as follows: the gas in the steel shaft 3 enters the sliding barrel 17 to push the sliding barrel to slide down immediately, meanwhile, the pressure in the sliding barrel 17 rises, when the pressure reaches the pressure threshold of the pressure reducing valve 19, the pressure reducing valve 19 is opened, the aerator 2 delivers the gas, meanwhile, the pressure in the sliding barrel 17 is reduced, the sliding barrel 17 moves upwards under the action of the spring, and when the pressure in the sliding barrel 17 is smaller than the pressure threshold of the pressure reducing valve 19, the pressure reducing valve 19 is closed;
the aerator 2 floats up and down on the horizontal plane of underground water, when the expansion piece 1 extends, the aerator 2 is submerged in the underground water, when the expansion piece 1 contracts, the aerator 2 is lifted from the underground water and suspended in an aeration well, the design has the effect that some of injected bacteria microorganisms are aerobic and some are anaerobic, and if the underground water or the aeration well is continuously aerated, the activity of anaerobic microorganisms can be inhibited, so that the soil remediation efficiency is reduced;
in order to ensure the air permeability of the horizontal extraction pipe 6, the horizontal extraction pipe 6 is surrounded by a stainless steel screen mesh which is a 100-mesh screen.
The working principle is as follows:
the microbial inoculum is stored in the batching box 10, the bottom of the batching box 10 is provided with an automatic sample injection valve, the valve opens the microbial inoculum to flow into the injector 5, the injector 5 injects the microbial inoculum into the polluted soil and underground water area, the heat transfer device is directly controlled by the power supply and distribution system 13, heat is generated by utilizing the thermal resistance principle, and the soil temperature is monitored in real time;
meanwhile, the compressed gas of the air compressor 8 is transmitted into the gas storage tank 9, the gas flow rate is adjusted through the gas storage tank 9, the gas is cooled by the refrigerator and then is guided into the aerator 2, and the aerator 2 aerates in the underground water to provide an aerobic environment for microorganisms and accelerate degradation of pollutants;
under the action of the heat transfer pipe 4, the cold air moves to the vicinity of the injection well and accumulates, the pollutants carried by the cold air are degraded by the injected microorganisms, and the gas and volatile pollutants are accumulated in the low-temperature heat transfer area;
at this time, the hot gas is extracted along with the gas phase extraction, the horizontal extraction pipe 6 extracts the accumulated pollutants and conveys the pollutants into the air compressor 8, and the circulation is repeated, so that the internal circulation of the isolation system is formed in the closed environment formed by the isolation device until the polluted gas is completely consumed by the microorganisms.
Note: the fixing connection means described herein is, if not specifically stated, any conventional fixing connection means such as screw connection, welding, and adhesion.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An integrated system for strengthening microbial remediation of organic contaminated soil and underground water is characterized by comprising a blocking device wrapped on the top of soil to be treated, a plurality of injection wells, a plurality of aeration wells and a plurality of air-permeable horizontal extraction pipes (6) which are positioned in the blocking device, wherein the aeration wells and the horizontal extraction pipes (6) are communicated through pipelines;
an injection pipe (14) is arranged in the injection well, a plurality of injectors (5) are communicated with the injection pipe (14), the injectors (5) are respectively positioned in the injection well and underground water, and a heat transfer pipe (4) is arranged in the injection well;
the aeration well is internally provided with a steel shaft (3), the bottom of the steel shaft (3) is provided with an aerator (2), the middle part of the steel shaft (3) is provided with a telescopic device (1), and the aerator (2) is driven by the telescopic device (1) to submerge or lift in underground water.
2. The integrated system for enhanced microbial remediation of organically-polluted soil and groundwater according to claim 1, wherein: the injection device is characterized in that the injector (5) is a cylindrical annular cylinder, a through infusion tube (23) is arranged in the middle of the injector (5), two ends of the infusion tube (23) are communicated with the injection tube (14), and a plurality of nozzles are arranged on the side wall of the injector (5).
3. The integrated system for enhanced microbial remediation of organically-polluted soil and groundwater according to claim 2, wherein: the nozzle comprises a plurality of straight-flow nozzles (20) which are distributed at intervals from top to bottom and a rotary nozzle.
4. The integrated system for enhanced microbial remediation of organically-polluted soil and groundwater according to claim 1, wherein: the injection wells and the aeration wells are arranged in a regular triangle or regular hexagon staggered mode, and the arrangement distance between the aeration wells and the injection wells is 1.0-3.0 m.
5. The integrated system for enhanced microbial remediation of organically-polluted soil and groundwater according to claim 1, wherein: the horizontal extraction pipes (6) are arranged in parallel and are positioned in the middle of the adjacent injection wells;
the two ends of the parallel horizontal extraction pipes (6) are communicated through horizontal connecting pipes (15), and vertical extraction pipes (16) extending out of the separation device are arranged on the two horizontal connecting pipes (15).
6. The integrated system for enhanced microbial remediation of organically-polluted soil and groundwater according to claim 1, wherein: the number ratio of the horizontal extraction pipes (6) to the aeration wells is 1: 1-1: 2.
7. The integrated system for enhanced microbial remediation of organically-polluted soil and groundwater according to claim 1, wherein: the expansion piece (1) is a closed cylindrical cylinder, and the top of the expansion piece (1) is communicated with the steel shaft (3);
a sliding cylinder (17) is arranged in the expansion piece (1), the top of the sliding cylinder (17) is provided with an opening, the bottom of the sliding cylinder (17) is communicated with an air conveying pipe, the inner diameter of the air conveying pipe is smaller than that of the steel shaft (3), and a pressure reducing valve (19) is arranged on the air conveying pipe;
the gas transmission pipe is inserted in the bottom of the expansion piece (1) in a sliding mode, the bottom end of the gas transmission pipe is fixedly connected with the steel shaft (3), and a compression spring (22) is sleeved on the periphery of the gas transmission pipe.
8. The integrated system for enhanced microbial remediation of organically-polluted soil and groundwater according to claim 1, wherein: aerator (2) is the confined tube-shape thing, the inside cavity of aerator (2), a plurality of micropores have been laid on the surface of aerator (2), and micropore density is 10000 ~ 15000 per square meter.
9. The integrated system for enhanced microbial remediation of organically-polluted soil and groundwater according to claim 1, wherein: the horizontal extraction pipe (6) is formed by enclosing a stainless steel screen mesh which is a 100-mesh screen.
10. The integrated system for enhanced microbial remediation of organically-polluted soil and groundwater according to claim 1, wherein: the barrier device is including enclosing vertical barrier layer (12) and the horizontal barrier layer (11) that are located the tube-shape opening part that establishes the tube-shape, horizontal barrier layer (11) are constituteed with SAM-921 wet paving method alternately lamination polyethylene membrane and concrete layer, vertical barrier layer (12) are the stagnant water curtain of concrete placement pouring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022825379.3U CN214184573U (en) | 2020-11-30 | 2020-11-30 | Integrated system for reinforcing microorganism to restore organic polluted soil and underground water |
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| CN202022825379.3U CN214184573U (en) | 2020-11-30 | 2020-11-30 | Integrated system for reinforcing microorganism to restore organic polluted soil and underground water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114309034A (en) * | 2022-01-07 | 2022-04-12 | 中科朗劢技术有限公司 | Method for improving soil environment |
| CN114393019A (en) * | 2022-01-20 | 2022-04-26 | 北京高能时代环境技术股份有限公司 | System for in-situ soil remediation and risk management and control of organochlorine pesticide contaminated site |
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2020
- 2020-11-30 CN CN202022825379.3U patent/CN214184573U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114309034A (en) * | 2022-01-07 | 2022-04-12 | 中科朗劢技术有限公司 | Method for improving soil environment |
| CN114393019A (en) * | 2022-01-20 | 2022-04-26 | 北京高能时代环境技术股份有限公司 | System for in-situ soil remediation and risk management and control of organochlorine pesticide contaminated site |
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