CN209935506U - Combined remediation system for petroleum hydrocarbon contaminated soil - Google Patents
Combined remediation system for petroleum hydrocarbon contaminated soil Download PDFInfo
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- CN209935506U CN209935506U CN201822232402.0U CN201822232402U CN209935506U CN 209935506 U CN209935506 U CN 209935506U CN 201822232402 U CN201822232402 U CN 201822232402U CN 209935506 U CN209935506 U CN 209935506U
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- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 description 3
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Abstract
The utility model discloses a combined remediation system for petroleum hydrocarbon contaminated soil, which comprises an injection vertical shaft, an air injection device, an inorganic nutrient salt dosing device, an organic carbon source dosing device, a microbial agent dosing device, a monitoring well, an intelligent regulation and control device and a plant remediation layer; the air injection device is communicated with a gas fracturing pipe around the injection vertical shaft; the inorganic nutrient salt dosing device, the organic carbon source dosing device and the microbial agent dosing device are communicated with the injection vertical shaft; the monitoring well is provided with a monitoring device, and the air injection device, the inorganic nutrient salt dosing device, the organic carbon source dosing device, the microbial agent dosing device and the monitoring device are electrically connected with the intelligent regulation and control device. The utility model provides a joint repair system can strengthen ventilation technology, microbial remediation technique and phytoremediation technique in coordination, is showing the clearance that improves petroleum hydrocarbon, improves joint repair system's repair effect, has shortened repair cycle greatly, and system configuration is simple moreover, convenient operation, security are high.
Description
Technical Field
The utility model relates to a soil organic pollution handles technical field, more specifically relates to a joint repair system for petroleum hydrocarbon pollutes soil.
Background
Soil is one of the natural resources on which humans rely for survival. However, organic soil pollution is becoming more and more serious due to atmospheric sedimentation (emission of fuel media and automobile exhaust), pollution irrigation, solid waste landfill leakage, oil field exploitation and the like. In China, the polycyclic aromatic hydrocarbon pollution of soil is quite serious, the concentration of the polycyclic aromatic hydrocarbon is increased from ug/kg to mg/kg, the detection rate is increased from 20 percent to 80 percent, and the detection rate in agricultural products is also up to 20 percent. Petroleum hydrocarbons are a class of "tertiary" and persistent organic pollutants that can migrate in the soil-crop system and cause secondary pollution of groundwater, endangering safety of agricultural products and human health; meanwhile, the petroleum hydrocarbon pollution of the soil has the characteristics of long-term property, concealment, irreversibility and incapability of being completely degraded, and the petroleum hydrocarbon pollution of the soil is seriously damaged and difficult to treat. Therefore, the research on the petroleum hydrocarbon polluted soil remediation technology and method has important significance on the current global environmental protection. However, in the prior art, the equipment for repairing the petroleum hydrocarbon polluted soil is complex and inconvenient to operate, and the repairing effect still needs to be improved.
Therefore, the development of a remediation system for petroleum hydrocarbon contaminated soil, which has simple equipment, good remediation effect and short remediation period, is urgently needed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome above-mentioned prior art the equipment of restoration petroleum hydrocarbon contaminated soil complicated, the operation is inconvenient, the relatively poor defect of repair effect, provide a joint repair system for petroleum hydrocarbon contaminated soil, the joint repair system who provides can strengthen ventilation technology, microbial remediation technique and phytoremediation technique in coordination, is showing the clearance that improves petroleum hydrocarbon, improves joint repair system's repair effect, has shortened repair cycle greatly, moreover system configuration is simple, convenient operation, security are high.
In order to solve the technical problem, the utility model discloses a technical scheme is:
a combined remediation system for petroleum hydrocarbon contaminated soil comprises an injection vertical shaft, an air injection device, an inorganic nutrient salt dosing device, an organic carbon source dosing device, a microbial agent dosing device, a monitoring well, an intelligent regulation and control device and a plant remediation layer arranged on a soil plough layer;
a plurality of gas cracking pipes are arranged in soil around the injection vertical shaft, and the air injection device is communicated with the gas cracking pipes through pipelines;
the inorganic nutrient salt dosing device, the organic carbon source dosing device and the microbial agent dosing device are respectively communicated with the injection vertical shaft through pipelines;
the monitoring well is provided with a monitoring device, and the air injection device, the inorganic nutrient salt dosing device, the organic carbon source dosing device, the microbial agent dosing device and the monitoring device are electrically connected with the intelligent control device.
The working principle is as follows: the gas fracturing pipes around the injection vertical shaft can improve the porosity of soil around the injection vertical shaft under the action of the air injection device and strengthen the ventilation of the injection vertical shaft; the intelligent control device monitors through the monitoring well and the monitoring deviceO of petroleum hydrocarbon contaminated soil2Concentration, CO2The concentration, the temperature, the humidity, the total N amount, the total P amount, the organic matter and the like, and the injection air pressure of an air injection pump is adjusted according to monitoring data, or the liquid adding amount of an inorganic nutrient salt dosing device, an organic carbon source dosing device and a microbial agent dosing device is adjusted, so that the repairing process is adjusted in real time, and the repairing is carried out efficiently.
The combined remediation system is specially used for strengthening the degradation and remediation of petroleum hydrocarbon contaminated soil by microorganisms, and fully utilizes the combination of strengthening ventilation treatment, the degradation of the microorganisms and phytoremediation technology, so that various technologies complement each other; the repairing effect of microbial degradation is improved by the enhanced ventilation and oxygen supply treatment, the removal rate of petroleum hydrocarbon reaches over 95 percent, and the repairing period is shortened; the addition of the inorganic nutrient salt and the organic carbon source ensures the growth requirement of soil microorganisms, stimulates the mass growth of petroleum hydrocarbon degrading bacteria and greatly shortens the repair period; the microbial agent for efficiently degrading and repairing petroleum hydrocarbon introduced by adding the microbial agent has the advantages of low repairing cost and environmental friendliness, and meanwhile, the microbial repairing period is greatly shortened by introducing the efficient degrading microbial agent.
The utility model provides a joint repair system can strengthen ventilation technology, microbial remediation technique and phytoremediation technique in coordination, has overcome the not enough of single technique, is showing the clearance that improves petroleum hydrocarbon, improves joint repair system's restoration effect, has shortened the repair cycle greatly, and system configuration is simple moreover, convenient operation, security are high.
Preferably, the air injection device comprises an air injection pump, an air check valve arranged at an air outlet of the air injection pump, and an air pressure gauge arranged at an air outlet of the air check valve; the air injection pump is electrically connected with the intelligent regulation and control device; and an air outlet of the air pressure gauge is communicated with the gas cracking pipe through a pipeline.
Preferably, the inorganic nutrient salt dosing device comprises an inorganic nutrient salt liquid storage tank, a first liquid adding pump, a first check valve and a first wet flowmeter which are sequentially communicated through a pipeline; the first liquid adding pump is electrically connected with the intelligent control device; and the liquid outlet of the first wet flowmeter is communicated with the injection vertical shaft through a pipeline.
Preferably, the organic carbon source dosing device comprises an organic carbon source liquid storage tank, a second liquid adding pump, a second check valve and a second wet flowmeter which are sequentially communicated through a pipeline; the second liquid adding pump is electrically connected with the intelligent control device; and the liquid outlet of the second wet flowmeter is communicated with the injection vertical shaft through a pipeline.
Preferably, the microbial agent dosing device comprises a microbial agent liquid storage tank, a third liquid adding pump, a third check valve and a third wet flowmeter which are sequentially communicated through a pipeline; the third liquid adding pump is electrically connected with the intelligent control device; and a liquid outlet of the third wet flowmeter is communicated with the injection vertical shaft through a pipeline.
Preferably, the pipeline of the combined repair system adopts a PE pipe. The PE pipe has the characteristics of high strength, high temperature resistance, corrosion resistance, no toxicity, wear resistance and the like.
Preferably, the inorganic nutrient salt liquid storage tank is filled with inorganic nutrient solution, and C, N, P in the inorganic nutrient solution are 100 (10-40) to 1-2.
Preferably, an organic carbon source material liquid is filled in the organic carbon source liquid storage tank, and the carbon content of the organic carbon source material liquid is 100-200 mg/L. The organic carbon source may be industrial glucose, protein or humic acid.
Preferably, the microbial agent storage tank is filled with petroleum hydrocarbon degrading microbial agent liquid or a microbial surface active microbial agent.
Preferably, the plant repairing layer is a hemp repairing layer.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a joint repair system can strengthen ventilation technology, microbial remediation technique and phytoremediation technique in coordination, has overcome the not enough of single technique, is showing the clearance that improves petroleum hydrocarbon, improves joint repair system's restoration effect, has shortened the repair cycle greatly, and system configuration is simple moreover, convenient operation, security are high.
Drawings
FIG. 1 is a schematic view of the combined remediation system for petroleum hydrocarbon contaminated soil of example 1.
FIG. 2 is a schematic view of the test procedure of test example 1.
Detailed Description
The present invention will be further described with reference to the following embodiments.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the drawings, the description is merely for convenience and simplicity of description, and it is not intended to indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, the terms describing the positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
Furthermore, if the terms "first," "second," and the like are used for descriptive purposes only, they are used for mainly distinguishing different devices, elements or components (the specific types and configurations may be the same or different), and they are not used for indicating or implying relative importance or quantity among the devices, elements or components, but are not to be construed as indicating or implying relative importance.
Example 1
A combined remediation system for petroleum hydrocarbon contaminated soil is shown in figure 1 and comprises an injection vertical shaft 5, an air injection device 1, an inorganic nutrient salt dosing device 2, an organic carbon source dosing device 3, a microbial agent dosing device 4, a monitoring well 6, an intelligent regulation and control device 8 and a plant remediation layer 9 arranged on a soil plough layer; the monitoring well 6 is provided with a monitoring device 7, and the monitoring device 7 is electrically connected with an intelligent control device 8. Four gas cracking pipes 14 are arranged in the soil around the injection vertical shaft 5; the four gas-fracturing tubes 14 are evenly distributed around the injection shaft 5. The plant repairing layer 9 is a hemp repairing layer.
The air injection device 1 comprises an air injection pump 11, an air check valve 12 arranged at an air outlet of the air injection pump 11 and an air pressure gauge 13 arranged at an air outlet of the air check valve 12; the air injection pump 11 is electrically connected with the intelligent control device 8; an air outlet of the air pressure gauge 13 is communicated with the gas cracking pipe 14 through a pipeline. The upper end of the injection shaft 5 is provided with a sealing element 51.
The inorganic nutrient salt dosing device 2 comprises an inorganic nutrient salt storage tank 21, a first liquid adding pump 22, a first check valve 23 and a first wet flowmeter 24 which are sequentially communicated through a pipeline; the first charging pump 22 is electrically connected with the intelligent control device 8; the outlet of the first wet flowmeter 24 is in communication with the injection shaft 5 through a pipe.
The inorganic nutrient salt storage tank 21 is filled with inorganic salt nutrient solution, wherein C, N, P in the inorganic salt nutrient solution are 100, (10-40) and (1-2).
The organic carbon source dosing device 3 comprises an organic carbon source liquid storage tank 31, a second liquid adding pump 32, a second check valve 33 and a second wet flowmeter 34 which are sequentially communicated through pipelines; the second liquid adding pump 32 is electrically connected with the intelligent control device 8; the outlet of the second wet flowmeter 34 is in communication with the injection shaft 5 by means of a pipe.
The organic carbon source liquid storage tank 31 is filled with organic carbon source liquid, and the carbon content of the organic carbon source liquid is 100-200 mg/L. The organic carbon source may be industrial glucose, protein or humic acid.
The microbial agent dosing device 4 comprises a microbial agent liquid storage tank 41, a third liquid adding pump 42, a third check valve 43 and a third wet flowmeter 44 which are sequentially communicated through pipelines; the third liquid adding pump 42 is electrically connected with the intelligent control device 8; the outlet of the third wet flowmeter 44 is in communication with the injection shaft 5 by means of a pipe.
The microbial agent storage tank 41 is filled with petroleum hydrocarbon degradation microbial agent liquid.
The pipeline of the combined repair system adopts a PE pipe. The PE pipe has the characteristics of high strength, high temperature resistance, corrosion resistance, no toxicity, wear resistance and the like.
The working principle is as follows: the gas fracturing pipes around the injection vertical shaft can improve the porosity of soil around the injection vertical shaft under the action of the air injection device and strengthen the ventilation of the injection vertical shaft; intelligent control deviceO monitoring petroleum hydrocarbon contaminated soil through monitoring well and monitoring device2Concentration, CO2The concentration, the temperature, the humidity, the total N amount, the total P amount, the organic matter and the like, and the injection air pressure of an air injection pump is adjusted according to monitoring data, or the liquid adding amount of an inorganic nutrient salt dosing device, an organic carbon source dosing device and a microbial agent dosing device is adjusted, so that the repairing process is adjusted in real time, and the repairing is carried out efficiently.
Test example 1
The soil to be tested of the experimental example is soil on a polluted site of a production enterprise of a certain comprehensive fertilizer plant, the enterprise ammonia synthesis process takes pulverized coal as a raw material, tar and the like generated in the processes of equipment operation, maintenance and production operation can cause the emission of petroleum hydrocarbon substances, the enterprise stops production and is moved, and the soil of the petroleum hydrocarbon site is reserved for five to six years. Under the condition of not changing the flow according to the system and the method, the scale can be enlarged to be applied to the restoration of large-area petroleum hydrocarbon polluted soil.
Firstly, the content of petroleum hydrocarbon in a public soil sample is detected, and the detection method comprises the following steps:
the petroleum hydrocarbon content of the soil is determined by an ultrasonic extraction-gravimetric method. Weighing 5.00g of air-dried soil sample in a 50mL centrifuge tube, adding 20mL of dichloromethane, uniformly mixing, performing ultrasonic extraction for 15min under the power of 60W, centrifuging for 10min at 4000r/min, pouring the supernatant into a flask with constant weight, repeating the steps for extraction for 3 times, performing rotary evaporation at 54 ℃ on all supernatants to dryness, and weighing. The difference between the front and rear weights is the weight of the total petroleum hydrocarbon.
The content of petroleum hydrocarbon in the soil sample to be tested is 97-644 mg/kg through determination. In the soil layer of 0-0.5 m, the concentration level of the total petroleum hydrocarbon is higher, the concentration range of the total petroleum hydrocarbon is 548-624 mg/kg, and the area of about 1/3 exceeds 607 mg/kg.
This test example examines the combined repair system of example 1.
The test method comprises the following steps: the air oxygen supply injection pressure is 0.1-0.8 MPa, the air injection rate is 200-800 mL/min, the C of the inorganic nutrient salt is 100 (10-40) and (1-2), the organic carbon source (such as industrial glucose, protein, humic acid and the like) contains 50-200 mg/L of carbon; and (4) cultivating soil to repair plants and selecting hemp seeds.
The test examples included the following steps:
step one, investigation and selection of a site: collecting a field soil sample, analyzing the petroleum hydrocarbon content, the total N content, the total P content, the organic matters and the like of the soil to obtain C, N and P of the field soil, and selecting a field with serious petroleum hydrocarbon pollution;
step two, preparing inorganic salt nutrient solution, organic carbon source and petroleum hydrocarbon degrading bacteria;
step three, assembling and connecting the combined repair system: will the utility model discloses a joint repair system prepares in the place of choosing, begins to carry out the normal position restoration experiment.
And step four, conducting a Chinese test, namely ① ventilating, pressing and loosening soil around an injection vertical shaft by using injection gas pressure (the injection pressure is 1-2 Mpa and is 2-3 hours), ② injecting a microbial agent, supplementing an inorganic salt nutrient solution and an organic carbon source, balancing C, N, P (the agent is injected into the well under the push of compressed air and is dispersed to the periphery, the injection pressure is 1-2 Mpa) of the petroleum hydrocarbon polluted soil in the field, ③ starting a combined remediation system, ④ planting hemp, and managing the field.
Step five, sampling and measuring periodically until the repair is finished: and (3) sampling soil every 10 days, and analyzing the total content of the petroleum hydrocarbon in the soil to be repaired until the petroleum hydrocarbon in the polluted soil is reduced to be within the national environmental protection standard or the removal rate of the petroleum hydrocarbon is stable, so that the remediation of the soil polluted by the petroleum hydrocarbon is finished. Through detection, the petroleum hydrocarbon removal rate of the petroleum hydrocarbon soil sample in the test example after being processed for one month (30 days) reaches 55.6 percent; the petroleum hydrocarbon removal rate after 2 months (60 days) of treatment reaches 72.4 percent; the petroleum hydrocarbon removal rate after 3 months (90 days) of treatment reaches 86.4 percent; and (3) restoring the soil until the hemp is mature and harvested, namely the removal rate of petroleum hydrocarbon reaches 96.4% after 130 days of treatment, and the treatment is continued after 130 days, but the change of the removal rate of total petroleum hydrocarbon of the soil is very small.
The soil pollutant to be repaired in the experimental example is petroleum hydrocarbon, and is the most typical organic pollutant in China in the chemical fertilizer industry in the field soil polluted by coal coking and ammonia synthesis process or other coking types. The utility model discloses a joint repair system, to the petroleum hydrocarbon pollution degree in this place pollutes soil characteristics such as dark, pollution history is long, adopts ventilation oxygen suppliment to handle, bioremediation processing and phytoremediation combined technology, gets rid of the petroleum hydrocarbon in the actual pollution place fast effectively. The utility model discloses will provide a new technical system for the restoration work in petroleum hydrocarbon pollution place, have great realistic meaning, economic benefits and environmental protection meaning to opening the green combined remediation technique who sends high-efficient, low-cost.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (6)
1. A combined remediation system for petroleum hydrocarbon contaminated soil is characterized by comprising an injection vertical shaft (5), an air injection device (1), an inorganic nutrient salt dosing device (2), an organic carbon source dosing device (3), a microbial agent dosing device (4), a monitoring well (6), an intelligent regulation and control device (8) and a plant remediation layer (9) arranged on a soil plough layer;
a plurality of gas cracking pipes (14) are arranged in soil around the injection vertical shaft (5), and the air injection device (1) is communicated with the gas cracking pipes (14) through pipelines;
the inorganic nutrient salt dosing device (2), the organic carbon source dosing device (3) and the microbial agent dosing device (4) are respectively communicated with the injection vertical shaft (5) through pipelines;
the monitoring well (6) is provided with a monitoring device (7), and the air injection device (1), the inorganic nutrient salt dosing device (2), the organic carbon source dosing device (3), the microbial agent dosing device (4) and the monitoring device (7) are electrically connected with the intelligent control device (8).
2. The combined repair system according to claim 1, wherein the air injection device (1) comprises an air injection pump (11), an air check valve (12) disposed at an air outlet of the air injection pump (11), and an air pressure gauge (13) disposed at an air outlet of the air check valve (12);
the air injection pump (11) is electrically connected with the intelligent control device (8); and an air outlet of the air pressure gauge (13) is communicated with the gas cracking pipe (14) through a pipeline.
3. The combined remediation system of claim 1 or 2, wherein the inorganic nutrient salt dosing device (2) comprises an inorganic nutrient salt storage tank (21), a first charge pump (22), a first check valve (23), and a first wet flowmeter (24) in sequential pipeline communication;
the first liquid adding pump (22) is electrically connected with the intelligent control device (8); the liquid outlet of the first wet flow meter (24) is communicated with the injection vertical shaft (5) through a pipeline.
4. The combined repair system of claim 1 or 2, wherein the organic carbon source dosing device (3) comprises an organic carbon source storage tank (31), a second dosing pump (32), a second check valve (33) and a second wet flowmeter (34) which are sequentially communicated through a pipeline;
the second liquid adding pump (32) is electrically connected with the intelligent control device (8); the liquid outlet of the second wet flow meter (34) is communicated with the injection vertical shaft (5) through a pipeline.
5. The combined remediation system of claim 1 or 2, wherein the microbial inoculant dosing device (4) comprises a microbial inoculant storage tank (41), a third priming pump (42), a third check valve (43), and a third wet flowmeter (44) in sequential pipeline communication;
the third liquid adding pump (42) is electrically connected with the intelligent control device (8); the liquid outlet of the third wet flow meter (44) is communicated with the injection vertical shaft (5) through a pipeline.
6. The combined repair system according to claim 1, wherein the plant repair layer (9) is a hemp repair layer.
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| CN201822232402.0U CN209935506U (en) | 2018-12-28 | 2018-12-28 | Combined remediation system for petroleum hydrocarbon contaminated soil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111451269A (en) * | 2020-04-07 | 2020-07-28 | 上海环境绿色生态修复科技有限公司 | Microbial remediation method for petroleum hydrocarbon contaminated soil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111451269A (en) * | 2020-04-07 | 2020-07-28 | 上海环境绿色生态修复科技有限公司 | Microbial remediation method for petroleum hydrocarbon contaminated soil |
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