CN209969192U - In-situ atomization injection system for repairing polluted site - Google Patents
In-situ atomization injection system for repairing polluted site Download PDFInfo
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- CN209969192U CN209969192U CN201822265485.3U CN201822265485U CN209969192U CN 209969192 U CN209969192 U CN 209969192U CN 201822265485 U CN201822265485 U CN 201822265485U CN 209969192 U CN209969192 U CN 209969192U
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Abstract
The utility model relates to an normal position atomizing injection system for restoreing pollute place, include: the medicament diluting unit comprises a medicament stock solution tank, a medicament diluting tank and a stirrer; the injection unit comprises an air compressor, a buffer tank, a pressure gauge, an air filter, a flowmeter, a check valve, a metering pump, a pressure gauge and a control panel; the atomizing unit comprises an injection well, an atomizing spray head, a perforated injection pipe, a spraying hole and a monitoring well. The medicament stock solution tank is connected with the medicament diluting tank through a pipeline, and the diluted medicament enters the atomizing nozzle through the check valve and the metering pump; compressed air enters the atomizing spray head through the buffer tank, the air filter and the flow meter. The diluted medicament and the compressed air collide with each other at the atomizing nozzle to form the vaporous medicament, and the vaporous medicament enters the soil and the underground water through the atomizing holes to decompose or stabilize pollutants in the soil and the underground water.
Description
Technical Field
The utility model belongs to the technical field of the environment is restoreed, concretely relates to normal position atomizing injection system for restoreing contaminated site.
Background
For a soil heavy pollution area and a high risk area, main pollutants of a polluted site are determined by the type and the process level of the enterprise industry, relate to the industries such as steel, coking, chemical engineering, dye, textile, printing and dyeing, automobile manufacturing, pesticide and the like, and mainly comprise a heavy metal polluted site, a persistent organic pollutant polluted site, a petroleum, chemical engineering, coking and other polluted sites mainly suffering from organic pollution and electronic waste pollution.
After the industrial enterprise is moved, the left site can influence human health to different degrees no matter whether the site is abandoned in an idle mode or is developed and recycled. Industrial contaminated sites can result in the transfer of contaminants to agriculture, from the surface to the ground, and eventually to the human food chain. Therefore, the remediation and treatment of the polluted site are concerned, and become a great environmental problem restricting the sustainable development of the regional socioeconomic.
At present, the requirement of domestic restoration treatment projects mainly comes from land development, the treatment time is required to be short, the effect is thorough, and the restoration mode is mainly ectopic restoration. However, ex-situ remediation is costly in terms of excavation, transportation, stacking, equipment use and maintenance, and the like; and the environment is damaged greatly, the operation risk is high, and secondary pollution is easily caused. Therefore, economic and environmental in-situ repair techniques are receiving increasing attention from industry personnel.
At present, patent documents for remedying contaminated soil and groundwater have been disclosed domestically. The patent CN104438315A discloses an in-situ chemical oxidation injection device for repairing polluted soil and underground water, and provides a simple, quick and feasible repairing method for a polluted site; however, the patent only adopts the conventional injection mode and cannot effectively increase the diffusion radius of the medicament. Patent CN203448391U discloses an in-situ remediation system for contaminated soil, which comprises a soil liquefaction unit and an oxidative degradation unit, wherein the soil around an output tip is liquefied into slurry through shock waves generated by instant release of high-pressure water, and the high-pressure water is fully contacted with the soil, so that the soil can be thoroughly remedied in situ, and secondary pollution of pollutants in the soil to air is avoided; however, in the patent, an aeration tank, a sedimentation tank, an ozone tank, a hydrogen peroxide tank and related supporting facilities are required to be arranged at the same time, the flow is complex, and the working procedures are complicated.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model provides an normal position atomizing injection system for restoreing contaminated site. By atomizing the remediation agent, contact with contaminants in the soil and groundwater accelerates decomposition or stabilization of the contaminants in the soil and groundwater.
The utility model discloses technical scheme as follows:
an in-situ atomization injection system for repairing a polluted site comprises a medicament dilution unit, an injection unit and an atomization unit;
the medicament diluting unit comprises a medicament stock solution tank, a medicament diluting tank and a stirrer for mixing the medicament and tap water. The reagent stock solution tank is connected with the reagent diluting tank through a reagent conveying pipeline, and tap water is injected into the reagent diluting tank through a water supply pipeline. The diluted medicament enters the infusion unit. The injection unit comprises an air compressor, a buffer tank, an air filter, a flowmeter, a metering pump, a control panel, a check valve and a pressure gauge. The air compressor is connected with the buffer tank through an air conveying pipeline, the buffer tank is connected with the air filter through an air conveying pipeline, and the air filter is connected with the flowmeter through an air conveying pipeline. The diluted medicament passes through a medicament conveying pipeline and enters the metering pump through the check valve.
The atomizing unit comprises an injection well, an atomizing spray head, a perforated injection pipe, a spraying hole and a monitoring well. The diluted medicament and compressed air enter the atomizing spray head through the injection unit to form an atomized medicament, and the atomized medicament contacts with pollutants in soil and underground water through the spray holes in the injection pipe with holes to accelerate the decomposition or stabilization of the pollutants in the soil and the underground water. The monitoring well is used for monitoring various parameters of pollutants in soil and underground water.
The utility model discloses a working process does:
1. through control panel, will tap water and liquid medicament ration pour into the medicament dilution tank 2 into, through mixer 3 misce bene, reach required concentration, the medicament after the dilution is carried atomizing unit through check valve 4, measuring pump 5.
2. Compressed air is stored in a buffer tank 10 by an air compressor 12, and the compressed air passes through an air filter 8 and a flow meter 6 in order and enters an atomization unit.
3. At the atomizing nozzle 14, the diluted chemical forms a mist-like chemical under the action of air pressure and enters the soil and the groundwater through the atomizing holes 16 on the injection pipe 15 with holes, so as to decompose or stabilize the pollutants in the soil and the groundwater.
To sum up, compare with prior art, the beneficial effects of the utility model are that:
the utility model discloses utilize compressed air to disperse liquid medicament into the droplet that the footpath is little, increased the diffusion radius of medicament, improved soil and groundwater in pollutant decomposition or stabilization rate, and then can shorten the restoration time limit for a project. In addition, this patent process is simple, and convenient operation has improved the treatment effeciency of equipment. In addition, the atomized agent improves the gas-liquid contact efficiency, so that the soil gas can be effectively treated. The utility model discloses release liquid medicament with the form of small droplet, simplified the process, improved treatment effeciency.
Drawings
Fig. 1 is the utility model relates to a structural schematic diagram of normal position atomizing injection system for restoreing contaminated site.
Fig. 2 is the working principle diagram of the atomizing unit of the present invention.
Fig. 3 is a schematic structural view of the atomizer.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not intended to limit the present invention.
As shown in fig. 1, fig. 2 and fig. 3, the utility model relates to an in situ atomization injection system for remediating contaminated site includes: the device comprises a medicament diluting unit, an injection unit and an atomization unit.
The utility model provides a medicament dilution unit includes medicament stock solution jar 1, medicament dilution tank 2 and mixer 3. The liquid medicament can be an oxidizing agent, a reducing agent and a stabilizing medicament; the stirrer 3 is arranged on the medicament diluting tanks 2, one stirrer 3 is arranged on each medicament diluting tank 2, and the liquid medicament and tap water are uniformly mixed by the stirrer 3 to reach the specified injection concentration; the medicament delivery pipeline can be made of proper materials according to the properties of medicaments; the raw liquid medicament tank 1 and the diluent medicament tank 2 can be made of polyethylene, polypropylene, polyvinyl chloride and the like, and the sizes of the raw liquid medicament tank and the diluent medicament tank are determined according to installation site conditions.
The utility model provides an injection unit includes air compressor 12, buffer tank 10, manometer 9, air cleaner 8, flowmeter 7, check valve 4, measuring pump 5, manometer 6, control panel 11. The medicament delivery pipeline is provided with a check valve 4, a metering pump 5 and a pressure gauge 6 for adjusting the flow and injection pressure of the medicament. The check valve 4 is used for enabling the medicine to flow in a single direction and preventing the medicine from flowing back to the medicine diluting unit; the metering pump 5 can be a diaphragm metering pump; the pressure gauge 6 may be of any type depending on the nature of the medicament. The air delivery line is provided with an air compressor 12, a buffer tank 10, a pressure gauge 9, an air filter 8, and a flow meter 7. The air compressor 12 is used for generating compressed air and providing an atomization power source; the buffer tank 10 is used for storing gas and buffering, so that gas supply is more stable, and carbon steel materials can be selected; the pressure gauge 9 is universal; the filter element of the air filter 8 is made of active carbon and is used for purifying air; the flow meter 7 may be a rotameter. The control panel 11 is used to control the transportation of tap water, liquid chemicals, compressed air, and the like, and the operation of each device.
The utility model provides an atomizing unit is including injecting well 13, atomizer 14, porose filling tube 15, spraying hole 16, monitoring well 17. The atomizer 14 is a device for generating atomized medicine, and is an air-flow atomizer, as shown in fig. 3, including: a compressed air inlet 14-1, a atomized medicament outlet 14-2 and a diluent inlet 14-3; as shown in FIG. 2, the perforated injection pipe 15 can be made of stainless steel pipe with a diameter of 100 and 200 mm; the spray holes 16 are screen holes with a diameter of 0.5 mm. Compressed air and the medicament after diluting collide each other, produce superfine vaporific medicament, wherein: after the fog drops with the large particle size of 10-30 mu m contact with soil and underground water, the fog drops are immediately fused and attached to the soil around the spraying holes to decompose or stabilize pollutants; the dry fog with the particle size of less than 10 mu m can not be immediately fused even if contacting with soil and underground water, but continuously diffuses to a deep position for fusion, so that pollutants are decomposed or stabilized, and the effective repair radius of the fog-shaped agent is closely related to the hydrogeological characteristics of a field, and is generally 2-6 m. In addition, the fog drops have ultrafine grain diameters, so that the contact efficiency of the fog drops to soil gas is good, and the fog drops also have good treatment effect on volatile gas. The monitoring well 17 is used for monitoring various parameters of pollutants in soil and underground water.
Examples
A place: a certain abandoned gas station;
target pollutant: BTEX and C6-C20;
background: the surface soil is clay or silty clay, the lower part is sandy clay and coarse soil, the pollution depth reaches 5m, and the treatment scale is 5000m3；
The repairing method comprises the following steps: selecting an oxidizing agent, injecting the oxidizing agent into a polluted area in turn, wherein the injection period of each turn is 10 days of injection time, the reaction time is 10 days, the detection and analysis time is 10 days, the periods are 30 calendar days, after the injection period is finished, whether the injection is continued or not is judged according to the soil pollutant concentration collected by a monitoring well, and if the soil pollutant concentration reaches a restoration target, the next turn of injection is stopped;
as a result: after 180 days of injecting the mist oxidant, the average concentration of the aliphatic hydrocarbon in the soil is reduced by 2500mg/kg, the average concentration of BTEX is reduced by 62.5mg/kg, and the area reaches the requirement of the restoration target.
Claims (6)
1. An in situ atomizing injection system for remediating a contaminated site, comprising:
the medicament diluting unit comprises a medicament stock solution tank, a medicament diluting tank and a stirrer;
the injection unit comprises an air compressor, a buffer tank, a pressure gauge, an air filter, a flowmeter, a check valve, a metering pump, a pressure gauge and a control panel;
the atomizing unit comprises an injection well, an atomizing spray head, a perforated injection pipe, a spraying hole and a monitoring well;
the medicament stock solution tank is connected with the medicament diluting tank through a medicament conveying pipeline, and tap water is injected into the medicament diluting tank through a water supply pipeline; the diluted medicament enters the injection unit;
the air compressor is connected with the buffer tank through an air conveying pipeline, the buffer tank is connected with the air filter through an air conveying pipeline, and the air filter is connected with the flowmeter through an air conveying pipeline; the diluted medicament passes through a medicament conveying pipeline and enters the metering pump through the check valve;
diluted medicament and compressed air are quantitatively injected into the atomizing nozzle through the conveying pipeline to form vaporific medicament, the vaporific medicament enters soil and underground water through the atomizing holes in the porous injection pipe, decomposition or stabilization of pollutants in the soil and the underground water is accelerated, gas-liquid contact efficiency is improved, and soil gas is effectively treated.
2. The in situ atomizing injection system for remediating a contaminated site as set forth in claim 1, wherein the agent is a water soluble agent comprising an oxidizing agent, a reducing agent, and/or a stabilizing agent.
3. The in situ atomization injection system for remediating a contaminated site as recited in claim 1,
the stirrer is arranged above the medicament diluting tank,
each medicament diluting tank is provided with a stirrer, and liquid medicaments and tap water are uniformly mixed by the stirrer to reach the specified injection concentration; selecting proper materials for the medicament delivery pipeline according to the properties of the medicament; the raw liquid tank and the diluting tank are made of polyethylene, polypropylene or polyvinyl chloride.
4. The in situ atomizing injection system for remediating a contaminated site as set forth in claim 1, wherein said atomizer is an air-flow atomizer comprising a compressed air inlet, an atomized agent outlet, and a diluted agent inlet.
5. The in situ atomization injection system for remediating a contaminated site as recited in claim 1,
the atomizing nozzle can carry out fixed-depth injection by adjusting the position, and effective diffusion of the medicament is ensured.
6. The in situ atomization injection system for remediating a contaminated site as recited in claim 4,
the diameter of the spraying hole is less than 1mm,
the grain diameter of the atomized medicament is less than 30 mu m, the outlet pressure is 0.5-3.0MPa, and the effective repair radius is 2-6 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822265485.3U CN209969192U (en) | 2018-12-31 | 2018-12-31 | In-situ atomization injection system for repairing polluted site |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822265485.3U CN209969192U (en) | 2018-12-31 | 2018-12-31 | In-situ atomization injection system for repairing polluted site |
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| CN209969192U true CN209969192U (en) | 2020-01-21 |
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| CN201822265485.3U Active CN209969192U (en) | 2018-12-31 | 2018-12-31 | In-situ atomization injection system for repairing polluted site |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115365287A (en) * | 2022-08-04 | 2022-11-22 | 北京科技大学 | A excavate stirring injection equipment for deep contaminated soil normal position is restoreed |
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2018
- 2018-12-31 CN CN201822265485.3U patent/CN209969192U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115365287A (en) * | 2022-08-04 | 2022-11-22 | 北京科技大学 | A excavate stirring injection equipment for deep contaminated soil normal position is restoreed |
| CN115365287B (en) * | 2022-08-04 | 2024-01-23 | 北京科技大学 | A excavate stirring medicine injection equipment for deep contaminated soil normal position is restoreed |
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