CN211637712U - Thermal ventilation strengthens petroleum hydrocarbon contaminated soil normal position prosthetic devices - Google Patents
Thermal ventilation strengthens petroleum hydrocarbon contaminated soil normal position prosthetic devices Download PDFInfo
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Abstract
The utility model provides a thermal ventilation reinforced petroleum hydrocarbon contaminated soil in-situ remediation device, which comprises a vacuum extraction system and a blast injection system; the vacuum extraction system comprises a vacuum pump, a gas-liquid separator, a gas purification device and a liquid purification device; the blast injection system comprises a blast heating device and a dosing device: the vacuum pump is connected with the extraction well; the fluid inlet of the gas-liquid separator is connected with the vacuum pump; the gas inlet of the gas purification device is connected with the gas outlet of the gas-liquid separator; a liquid inlet of the liquid purification device is respectively connected with a liquid outlet of the gas-liquid separator and a liquid outlet of the dosing device; the blast heating device is connected with the injection well; and a liquid outlet of the dosing device is respectively connected with the injection well and a liquid inlet of the medicament buffering device. The device provided by the utility model combines technologies such AS SVE, AS and low temperature thermal desorption, improves light oil pollution place remediation efficiencies such AS vapour, diesel oil.
Description
Technical Field
The utility model relates to a soil normal position restoration technical field. More particularly, relates to a thermal ventilation reinforced petroleum hydrocarbon contaminated soil in-situ remediation device.
Background
The accidents of soil and underground water pollution caused by the leakage of gas stations and finished oil depots are frequent. In 1995, 78 tons of diesel oil leaked from a gas station of an Anjia building in Beijing leaked into soil and underground water within one week, so that a nearby water plant is forced to stop production, and the water supply range is influenced to 36 kilometers; in 2006, a large amount of leakage occurs in the Jiangsu Nanjing Panlong refueling station, the oil storage tank of the three-well refueling station leaks in the same year, and the leaked gasoline spreads to municipal sewer pipelines; in the south-Su area, leakage detection is carried out on 29 gas stations, 21 gas stations have leakage with different degrees, accounting for 72.4% of the total number of the gas stations to be investigated, and 12 gas stations in 20 gas stations have leakage phenomena more than 15 years ago; in 2008, oil pipelines of Guangzhou Guangde gas stations leak, and leaked oil permeates nearby sidewalks. After the oil product leaks, part of the oil product is removed through volatilization, degradation and the like, but part of the petroleum hydrocarbon can be retained in the natural environment for a long time, so that the soil and the underground water are polluted, and the human health is threatened. To date, petroleum hydrocarbon pollution has become an important factor in soil and groundwater pollution.
The leaked oil products of the gas station and the finished product oil depot storage tank are mainly gasoline and diesel oil, and the pollution components mainly comprise gasoline and diesel oil, benzene series, polycyclic aromatic hydrocarbon, MTBE and the like. Gasoline and diesel oil are mixture, and the gasoline component mainly includes C4-C12 aliphatic hydrocarbon and cyclic hydrocarbon, including partial olefin, small amount of aromatic hydrocarbon, sulfide, etc. The diesel oil mainly contains C10-C22 hydrocarbons, which generally comprise 67.69% of alkanes, 15.22% of cycloalkanes, 17.09% of aromatic hydrocarbons (comprising monocyclic aromatic hydrocarbons, polycyclic aromatic hydrocarbons, heterocyclic aromatic hydrocarbons and the like) and 0.40% of colloid. Benzene series (BETX) mainly comprises benzene, toluene, ethylbenzene, xylene, styrene and the like. Various studies and testifies that benzene series organisms are toxic to organisms and can cause direct harm to human health. BTEX has been studied to cause symptoms such as neurasthenia, headache, insomnia, vertigo, lower limb fatigue and genetic toxicity (DNA damage), and can cause anemia and leukemia in human body after long-term contact.
The oil pollution remediation technology is classified according to disposal sites, and the remediation modes of the oil pollution soil mainly comprise in-situ remediation and ex-situ remediation, wherein the in-situ remediation has the characteristics of low investment and small influence on the surrounding environment. The main categories of the repair technology include physical repair, chemical repair, biological repair and the like, each repair technology has the application range and the advantages and disadvantages,
soil gas phase Extraction (SVE) is a Soil in-situ remediation technology, negative pressure is generated by the Extraction action of a vacuum pump, directional flow of air is formed in a Soil unsaturated zone, and volatile and semi-volatile organic matters in Soil gaps are desorbed and carried out when the air flows through a polluted area, so that the purpose of purifying the Soil is achieved, and the method is mainly used for remedying the volatile and semi-volatile organic pollutants. Compared with the ectopic remediation technology, the SVE is a soil remediation method with better technical and economic performance.
An aeration remediation technology (AS) for groundwater pollution is an in-situ remediation technology for volatile organic pollutants in soil and groundwater in a saturated region. As sprays fresh air into the soil and underground water in the saturation area through the blower, the air is transported in the soil porous medium under the action of buoyancy and pressure gradient, so that pollutants are volatilized and rise from soil gaps and underground water to be removed by the ground treatment system.
Under the common condition, the underground water aeration remediation technology (AS) is combined with the soil vapor extraction technology (SVE), and after the air containing volatile organic pollutants rises to an aeration zone, the volatile organic pollutants are collected and treated by a soil vapor extraction centralized treatment system, so that the purpose of removing the volatile organic pollutants is achieved.
The combination of the groundwater aeration remediation technology (AS) and the soil vapor extraction technology (SVE) is very effective for volatile organic compounds, but the organic pollutants except the light volatile petroleum hydrocarbon components are difficult to completely remove due to the strong adsorption effect of the organic compounds and the soil matrix, the relatively weak volatilization capacity of the semi-volatile organic pollutants and the like.
The low-temperature thermal desorption in-situ soil restoration technology is characterized in that hot air is heated to a certain temperature through direct or indirect heat exchange, and when gas flows through soil gaps, volatilization and desorption of volatile semi-volatile organic pollutants in soil and underground water are accelerated, so that the restoration target is achieved.
At present, in the prior art, single technical research is carried out on in-situ remediation technologies such AS an underground water aeration remediation technology (AS), a soil vapor extraction technology (SVE) and the like, and partial field experiments are carried out successively, but the three technologies are combined to make up for deficiencies and achieve advantage complementation, so that a combined remediation technology for improving the remediation effect of organic pollutants in soil and underground water is still blank in technical research and engineering implementation.
Therefore, the utility model provides a thermal ventilation strengthens petroleum hydrocarbon contaminated soil normal position prosthetic devices to solve above-mentioned problem.
SUMMERY OF THE UTILITY MODEL
One object of the utility model is to provide a thermal ventilation reinforced in-situ remediation device for petroleum hydrocarbon contaminated soil; the device achieves the effects of making up for deficiencies of others and complementing advantages by combining SVE, AS, low-temperature thermal desorption and other restoration technologies, can obviously improve the restoration efficiency of light oil polluted sites such AS gasoline, diesel oil and the like, and fills the gap of the combined restoration technology.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a thermal ventilation enhanced petroleum hydrocarbon contaminated soil in-situ remediation device comprises a vacuum extraction system and a blast injection system; the vacuum extraction system comprises a vacuum pump, a gas-liquid separator, a gas purification device and a liquid purification device; the blast injection system comprises a blast heating device and a dosing device:
the vacuum pump is connected with the extraction well and is used for extracting underground water and soil gas;
the fluid inlet of the gas-liquid separator is connected with the vacuum pump and is used for carrying out gas-liquid separation on underground water and soil gas pumped out by the vacuum pump;
the gas inlet of the gas purification device is connected with the gas outlet of the gas-liquid separator and is used for removing volatile organic compounds contained in the gas separated by the gas-liquid separator;
a liquid inlet of the liquid purification device is respectively connected with a liquid outlet of the gas-liquid separator and a liquid outlet of the dosing device and is used for removing oily sewage in the liquid separated by the gas-liquid separator;
the blowing heating device is connected with the injection well and is used for blowing hot air into the injection well to remove volatile and semi-volatile organic pollutants in soil;
and the liquid outlet of the dosing device is respectively connected with the injection well and the liquid inlet of the liquid purification device, and is used for injecting a soil remediation medicament into the injection well and providing the soil remediation medicament for the liquid purification device in the vacuum extraction system.
Preferably, gas purification device includes tail gas adsorption equipment, tail gas adsorption equipment's air inlet with gas-liquid separator's gas outlet is connected for adsorb the volatile organic compounds in the soil gas.
Preferably, the gas purification device further comprises a cold dryer, wherein the cold dryer is arranged between the tail gas adsorption device and the gas-liquid separator and used for removing volatile organic compounds contained in soil gas extracted by a vacuum pump through cooling.
Preferably, the liquid purification device comprises a medicament buffer device and an oil-water separation device, a liquid inlet of the medicament buffer device is respectively connected with a liquid outlet of the gas-liquid separator and a liquid outlet of the dosing device, and a liquid inlet of the oil-water separation device is connected with a liquid outlet of the medicament buffer device; the agent buffering device is used for mixing liquid separated by the soil remediation agent and the gas-liquid separator, the oil-water separation device is used for separating oily sewage in the mixed liquid, separated oil stains enter the oil recovery device, and the separated sewage is discharged to the sewage drainage pipeline system.
Preferably, the oil-water separation device comprises a coarse filter and an oil-water filter; the liquid inlet of the coarse filter is connected with the liquid outlet of the medicament buffering device, and the liquid outlet of the coarse filter is connected with the liquid inlet of the oil-water filter; the coarse filter is used for preliminarily filtering mixed liquid output by the medicament buffering device, and the oil-water filter is used for carrying out oil-water separation on the liquid output by the coarse filter.
Preferably, a self-priming pump is arranged between the gas-liquid separator and the liquid purification device in the vacuum extraction system, and further, the self-priming pump is also connected with the extraction well and is used for extracting the underground water and/or the liquid separated by the gas-liquid separator in the extraction well, and at the moment, the liquid purification device is used for removing the oily sewage in the underground water and/or the liquid separated by the gas-liquid separator extracted by the self-priming pump.
Preferably, the vacuum extraction system further comprises a buffer device arranged between the extraction well and the vacuum pump.
Preferably, the vacuum extraction system further comprises a vacuum pump circulating water air cooler, a liquid inlet of the vacuum pump circulating water air cooler is connected with a liquid outlet of the gas-liquid separator, and a liquid outlet of the vacuum pump circulating water air cooler is connected with the vacuum pump.
Preferably, the blast heating apparatus in the blast injection system comprises a heater connected to the injection well and a blower connected to the heater; the air blower is used for blowing air to the injection well, and the heater is used for heating the air output by the air blower, so that the air outlet temperature is increased, and the desorption efficiency of volatile semi-volatile organic pollutants in soil particles is increased.
Preferably, the dosing device in the blast injection system comprises a plurality of groups of dosing units which are arranged in parallel, and each group of dosing units comprises a drug storage device for mixing the soil remediation agent and water and a dosing pump for pumping the mixed drug in the drug storage device into the injection well and the drug buffer device respectively.
Preferably, a stirrer for uniformly stirring the soil remediation agent and water is arranged in the agent storage device.
Preferably, the medicament storage device is respectively connected with the water supply device and the soil remediation agent supply device.
The utility model has the advantages as follows:
the utility model provides a petroleum hydrocarbon pollutes soil normal position prosthetic devices is reinforceed in hot ventilation unites restoration techniques such AS SVE, AS and low temperature thermal desorption, gets strong and makes up for the short, the advantage is complementary, is showing and is improving light oil pollution place repair efficiency such AS vapour, diesel oil.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 shows a schematic view of a thermal ventilation enhanced in situ remediation device for petroleum hydrocarbon contaminated soil provided by the present invention;
FIG. 2 shows a schematic view of a vacuum extraction system provided by the present invention;
figure 3 shows a schematic view of a blast heating apparatus provided by the present invention;
fig. 4 shows a schematic view of the dosing device provided by the present invention;
the system comprises a vacuum pump 1, a gas-liquid separator 2, a gas purification device 3, a tail gas adsorption device 31, an air cooler 32, a liquid purification device 4, a medicament buffer device 41, an oil-water separation device 42, a coarse filter 421, an oil-water filter 422, an air blowing heating device 5, an air blower 51, a heater 52, a medicament feeding device 6, a medicament storage device 61, a stirrer 611, a medicament feeding pump 62, an extraction well 7, an injection well 8, a buffer device 9, a self-priming pump 10, a water supply device 11, a soil remediation agent supply device 12 and a vacuum pump circulating water air cooler 13.
Detailed Description
In order to explain the present invention more clearly, the present invention will be further described with reference to the preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
For solving single soil normal position repair system and get rid of the single scheduling problem of pollutant, the utility model provides a petroleum hydrocarbon pollutes soil normal position prosthetic devices is reinforceed in thermal ventilation, like figure 1, include:
the vacuum extraction system is used for extracting underground water and soil gas in the repair well and removing volatile organic compounds; and the air blowing injection system is used for blowing air into the repair well and injecting a soil repair agent to remove volatile and semi-volatile organic compounds.
As a specific embodiment of the present invention, as shown in fig. 2, the vacuum extraction system includes:
the vacuum pump 1 is connected with the extraction well 7 and used for extracting underground water and soil gas;
the fluid inlet of the gas-liquid separator 2 is connected with the vacuum pump and is used for carrying out gas-liquid separation on the underground water and the soil gas pumped out by the vacuum pump;
a gas purification device 3 for removing volatile organic compounds contained in the gas separated by the gas-liquid separator; the gas purification device 3 comprises a tail gas adsorption device 31, wherein a gas inlet of the tail gas adsorption device 31 is connected with a gas outlet of the gas-liquid separator 2 and is used for adsorbing volatile organic compounds in soil gas; further, the gas purification device 3 further comprises a cooling dryer 32, wherein the cooling dryer 32 is arranged between the tail gas adsorption device 31 and the gas-liquid separator 2, and is used for removing volatile organic compounds contained in soil gas extracted by a vacuum pump through cooling; the tail gas adsorption device 31 may be, for example, an activated carbon adsorption device;
and a liquid purification device 4 for mixing groundwater and a soil remediation agent; the liquid purification device 4 comprises a medicament buffer device 41 and an oil-water separation device 42, wherein the oil-water separation device 42 further comprises a coarse filter 421 and an oil-water filter 422; a liquid inlet of the medicament buffer device 41 is connected with a liquid outlet of the gas-liquid separator 2 and a liquid outlet of the dosing device 6 respectively, a liquid inlet of the coarse filter 421 is connected with a liquid outlet of the medicament buffer device 41, and a liquid outlet of the coarse filter 421 is connected with a liquid inlet of the oil-water filter 422; the medicament buffer device 41 is used for mixing a soil remediation medicament and liquid separated by the gas-liquid separator, the coarse filter is used for primarily filtering mixed liquid output by the medicament buffer device, the oil-water filter is used for carrying out oil-water separation on the liquid output by the coarse filter, separated oil dirt enters the oil recovery device, and the separated sewage is discharged to the sewage drainage pipeline system; the drug buffer device 41 may be, for example, a drug buffer tank; the liquid purification device in the vacuum extraction system is connected with the dosing device in the blast injection system, so that the vacuum extraction system and the blast injection system are effectively combined, and the liquid purification effect is further improved.
In addition, the vacuum extraction system also comprises a vacuum pump circulating water air cooler 12, wherein a liquid inlet of the vacuum pump circulating water air cooler 12 is connected with a liquid outlet of the gas-liquid separator 2, and a liquid outlet of the vacuum pump circulating water air cooler 12 is connected with the vacuum pump 1; the vacuum extraction system further comprises a buffer device 9 arranged between the extraction well 7 and the vacuum pump 1.
In order to further purify the underground water in the soil, a self-sucking pump 10 is arranged between the gas-liquid separator 2 and the liquid purification device 4 in the vacuum extraction system, further, the self-sucking pump 10 is also connected with the extraction well 7 and is used for extracting the liquid separated by the underground water and/or the gas-liquid separator in the extraction well, and at the moment, the liquid purification device 4 is used for removing the oily sewage in the liquid separated by the underground water and/or the gas-liquid separator 2 extracted by the self-sucking pump 10.
Referring to fig. 3 and 4, the blast injection system in the thermal ventilation enhanced petroleum hydrocarbon contaminated soil in-situ remediation device comprises:
the blowing heating device 5, as shown in fig. 3, comprises a heater 52 connected with the injection well 8 and a blower 51 connected with the heater 52, wherein the blower 51 is used for blowing air to the injection well 8, and the heater 52 is used for heating the air output by the blower 51, increasing the outlet air temperature and increasing the desorption efficiency of volatile semi-volatile organic pollutants in soil particles;
and a dosing device 6, as shown in fig. 4, which comprises a plurality of groups of dosing units arranged in parallel, wherein each group of dosing units comprises a drug storage device 61 for mixing the soil remediation agent and water and a drug pump 62 for pumping the mixed drug in the drug storage device into the injection well 8 and the drug buffer device 41 respectively; wherein, a stirrer for uniformly stirring the soil remediation agent and water is arranged in the agent storage device 61; the liquid inlet of the medicament storage device 61 is respectively connected with a water supply device and a soil remediation agent supply device, and the medicament storage device 61 can be a medicament storage tank, for example.
It should be understood that, the utility model discloses in all can all pass through the tube coupling between the device, further, can understand, still can set up valve etc. as required on all pipelines, the valve can be two-way valve, also can be three-way valve. The utility model provides a vacuum pump, vapour and liquid separator, tail gas adsorption equipment, air-cooler, medicament buffer tank, coarse filter, oil water filter, air-blower, heater, dosing pump, medicine storage tank, self priming pump and basket filter etc. if do not have special explanation adopt equipment commonly used on the market can.
To sum up, the in-situ remediation device for the heat ventilation reinforced petroleum hydrocarbon contaminated soil provided by the utility model can extract light volatile pollution components in the field soil, such as straight-chain alkane, isoparaffin, aromatic hydrocarbon and the like of a gasoline section C6-C12, through the vacuum extraction system; the blast injection system can remove light volatile pollution components such as benzene series substances in the field soil and underground water, and in addition, the blast heating system in the blast injection system improves the air outlet temperature and increases the desorption efficiency of volatile semi-volatile organic pollutants in soil particles; the removal of volatile and semi-volatile organic compounds in soil and underground water is achieved through the combined action of a vacuum extraction system and a blast injection system.
Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it is obvious for those skilled in the art to make other variations or changes based on the above descriptions, and all the embodiments cannot be exhausted here, and all the obvious variations or changes that belong to the technical solutions of the present invention are still in the protection scope of the present invention.
Claims (10)
1. A thermal ventilation enhanced petroleum hydrocarbon contaminated soil in-situ remediation device is characterized by comprising a vacuum extraction system and a blast injection system; the vacuum extraction system comprises a vacuum pump, a gas-liquid separator, a gas purification device and a liquid purification device; the blast injection system comprises a blast heating device and a dosing device:
the vacuum pump is connected with the extraction well; the fluid inlet of the gas-liquid separator is connected with the vacuum pump; the gas inlet of the gas purification device is connected with the gas outlet of the gas-liquid separator; a liquid inlet of the liquid purification device is respectively connected with a liquid outlet of the gas-liquid separator and a liquid outlet of the dosing device; the blast heating device is connected with the injection well; and the liquid outlet of the dosing device is respectively connected with the injection well and the liquid inlet of the liquid purification device.
2. The device for in-situ remediation of soil contaminated by petroleum hydrocarbons according to claim 1, wherein the gas purification device comprises a tail gas adsorption device, and a gas inlet of the tail gas adsorption device is connected to a gas outlet of the gas-liquid separator.
3. The device for in-situ remediation of soil contaminated with petroleum hydrocarbons according to claim 2, wherein the gas purification device further comprises a freeze dryer, the freeze dryer being disposed between the tail gas adsorption device and the gas-liquid separator.
4. The thermal ventilation enhanced in-situ remediation device for petroleum hydrocarbon contaminated soil as claimed in claim 1, wherein the liquid purification device comprises a medicament buffering device and an oil-water separation device, wherein a liquid inlet of the medicament buffering device is connected to a liquid outlet of the gas-liquid separator and a liquid outlet of the chemical feeding device, respectively, and a liquid inlet of the oil-water separation device is connected to a liquid outlet of the medicament buffering device.
5. The apparatus according to claim 4, wherein the oil-water separation device comprises a coarse filter and an oil-water filter; wherein, the liquid inlet of coarse filter connects the liquid outlet of medicament buffer, the liquid outlet of coarse filter connects oil water filter's liquid inlet.
6. The device for in-situ remediation of petroleum hydrocarbon contaminated soil through thermal ventilation enhancement according to claim 1, wherein a self-priming pump is arranged between the gas-liquid separator and the liquid purification device in the vacuum extraction system, and the self-priming pump is further connected with the extraction well.
7. The apparatus of claim 1, wherein the vacuum extraction system further comprises a buffer device disposed between the extraction well and the vacuum pump.
8. The hot-ventilation-enhanced in-situ petroleum hydrocarbon contaminated soil remediation device as claimed in any one of claims 1 to 7, wherein the vacuum extraction system further comprises a vacuum pump circulating water air cooler, a liquid inlet of the vacuum pump circulating water air cooler is connected with a liquid outlet of the gas-liquid separator, and a liquid outlet of the vacuum pump circulating water air cooler is connected with the vacuum pump.
9. The apparatus of claim 1, wherein the blast heating apparatus in the blast injection system comprises a heater connected to the injection well and a blower connected to the heater.
10. The in-situ remediation device for petroleum hydrocarbon contaminated soil by thermal ventilation enhancement as claimed in claim 1, wherein the dosing device in the blast injection system comprises a plurality of groups of dosing units arranged in parallel, each group of dosing units comprises a drug storage device for mixing the soil remediation agent and water and a dosing pump for pumping the mixed drug in the drug storage device into the remediation well and the drug buffer device respectively.
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| CN201922078624.6U CN211637712U (en) | 2019-11-27 | 2019-11-27 | Thermal ventilation strengthens petroleum hydrocarbon contaminated soil normal position prosthetic devices |
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| CN201922078624.6U CN211637712U (en) | 2019-11-27 | 2019-11-27 | Thermal ventilation strengthens petroleum hydrocarbon contaminated soil normal position prosthetic devices |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114733899A (en) * | 2022-04-15 | 2022-07-12 | 湖北理工学院 | Modular copper-cadmium heavy metal polluted site in-situ passivation and soil improvement system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114733899A (en) * | 2022-04-15 | 2022-07-12 | 湖北理工学院 | Modular copper-cadmium heavy metal polluted site in-situ passivation and soil improvement system and method |
| CN114733899B (en) * | 2022-04-15 | 2023-01-17 | 湖北理工学院 | Modular copper-cadmium heavy metal polluted site in-situ passivation and soil improvement system and method |
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