CN109382404B - Petroleum hydrocarbon polluted soil remediation device and remediation method - Google Patents
Petroleum hydrocarbon polluted soil remediation device and remediation method Download PDFInfo
- Publication number
- CN109382404B CN109382404B CN201710685651.2A CN201710685651A CN109382404B CN 109382404 B CN109382404 B CN 109382404B CN 201710685651 A CN201710685651 A CN 201710685651A CN 109382404 B CN109382404 B CN 109382404B
- Authority
- CN
- China
- Prior art keywords
- soil
- petroleum hydrocarbon
- oxidant
- horizontal reaction
- light source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
Abstract
The invention relates to the field of environmental protection, in particular to a petroleum hydrocarbon polluted soil restoration device and a restoration method, wherein the restoration device comprises: a horizontal reaction bin; the oxidant feeding equipment is arranged at the upper part of the horizontal reaction bin; the ultraviolet light source is arranged at the upper part of the horizontal reaction bin; and the soil conveying equipment is arranged at the bottom of the horizontal reaction bin. The method for restoring the soil polluted by the petroleum hydrocarbon comprises the following steps: adding petroleum hydrocarbon polluted soil and additives into the horizontal reaction bin, and continuously conveying the soil and the additives through soil conveying equipment; under the irradiation of an ultraviolet light source, the oxidant provided by the oxidant feeding equipment is mixed and contacted with the mixture of the petroleum hydrocarbon polluted soil and the additive. The method for restoring the petroleum hydrocarbon polluted soil can improve the restoring efficiency, reduce the adding amount of the oxidant and avoid secondary pollution caused by adding the transition metal catalyst.
Description
Technical Field
The invention relates to the field of environmental protection, in particular to a petroleum hydrocarbon polluted soil remediation device and a remediation method using the same.
Background
Petroleum hydrocarbons are mainly composed of various hydrocarbons such as n-paraffins, branched paraffins, cyclic paraffins, and aromatic hydrocarbons, and are widely present in crude oil and petroleum products. The pollution of petroleum hydrocarbon in soil is a process of leading toxic and harmful petroleum hydrocarbon organic matters to enter soil under the action of artificial activities, and leading petroleum hydrocarbon to accumulate in the soil when the quantity and the speed of the organic matters exceed the purification action speed of the soil, thereby causing the natural function disorder and the quality reduction of the soil. Sudden accidents, improper discharge of sewage, leaching of solid waste, underground oil storage tanks and oil pipeline leaks can all lead to petroleum hydrocarbon contamination of the soil. At present, methods for repairing petroleum hydrocarbon contaminated soil at home and abroad mainly comprise gas phase extraction, normal temperature desorption or thermal desorption, biological ventilation, chemical oxidation and the like, and the methods can be implemented in an in-situ mode and an ex-situ mode. The method is high in efficiency and suitable for emergency treatment of polluted sites with serious local pollution and small earth volume. However, ectopic chemical oxidation is mostly carried out intermittently, the adding amount of the oxidant is large, secondary pollution is easily caused by adding the transition metal catalyst, the influence on the soil property is obvious, and the treatment process has environmental risk which is difficult to estimate.
Disclosure of Invention
The invention aims to provide an ultraviolet light oxidation treatment device for rapidly repairing petroleum hydrocarbon polluted soil and a method for repairing the petroleum hydrocarbon polluted soil by using the device, aiming at the problems that ex-situ chemical oxidation operation cannot be continuously carried out, the addition amount of an oxidant is large, secondary pollution is easily caused by adding a transition metal catalyst and the like in the prior art.
In order to achieve the above objects, one aspect of the present invention provides a petroleum hydrocarbon contaminated soil remediation device, comprising:
a horizontal reaction bin;
the oxidant feeding equipment is arranged at the upper part of the horizontal reaction bin;
the ultraviolet light source is arranged at the upper part of the horizontal reaction bin; and
and the soil conveying equipment is arranged at the bottom of the horizontal reaction bin.
The invention also provides a method for repairing petroleum hydrocarbon polluted soil by using the device, which comprises the following steps:
adding petroleum hydrocarbon polluted soil and additives into the horizontal reaction bin, and continuously conveying the soil and the additives through soil conveying equipment;
under the irradiation of an ultraviolet light source, the oxidant provided by the oxidant feeding equipment is mixed and contacted with the mixture of the petroleum hydrocarbon polluted soil and the additive.
In the method for restoring the petroleum hydrocarbon polluted soil, the polluted soil can be continuously treated by continuously conveying the soil through the soil conveying equipment, and the oxidant can be excited to generate free radicals with stronger oxidability (such as HO and SO) through the irradiation of the ultraviolet light source4·-Etc.), the free radicals can efficiently oxidize petroleum hydrocarbon pollutants, thereby reducing the dosage of the oxidant and avoiding secondary pollution caused by adding the transition metal catalyst.
Drawings
FIG. 1 is a schematic structural diagram of a petroleum hydrocarbon contaminated soil remediation device according to the present invention.
Description of the reference numerals
1 feed inlet 2 baffle
3 motor 4 soil conveying equipment
5 oxidant adding equipment 6 ultraviolet light source
7 quartz tube 8 gas outlet
9 discharge port 10 horizontal reaction bin
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
In one aspect, the present invention provides a petroleum hydrocarbon contaminated soil remediation apparatus, as shown in fig. 1, comprising:
a horizontal reaction bin 10;
the oxidant feeding equipment 5 is arranged at the upper part of the horizontal reaction bin 10;
the ultraviolet light source 6 is arranged at the upper part of the horizontal reaction bin 10; and
and the soil conveying equipment 4 is arranged at the bottom of the horizontal reaction bin 10.
The operation process of the petroleum hydrocarbon polluted soil remediation device can comprise the following steps: adding petroleum hydrocarbon polluted soil and additives into the horizontal reaction bin 10, and continuously conveying the soil and the additives through the soil conveying equipment 4; and adding an oxidant through an oxidant adding device 5, and irradiating ultraviolet light through an ultraviolet light source 6 to ensure that the petroleum hydrocarbon polluted soil is in mixed contact with the oxidant and the additive under the irradiation of the ultraviolet light so as to realize the remediation treatment of the petroleum hydrocarbon polluted soil.
In the petroleum hydrocarbon contaminated soil remediation device of the present invention, the horizontal reaction chamber 10 may be a single chamber, or may be a plurality of chambers. Preferably, the horizontal reaction chamber 10 is a plurality of chambers, for example, 3 to 8 chambers.
When the horizontal reaction chamber 10 is a plurality of chambers, the chambers may be separated from each other in a conventional manner in the art, for example, by a partition 2 (see fig. 1). The partition board 2 is arranged in a way that two adjacent chambers are communicated only through the lower end opening of the partition board 2. The lower edge of the partition 2 allows the material conveyed by the soil conveyor 4 to pass through without obstruction.
In a preferred embodiment, the horizontal reaction chamber 10 includes n chambers, n is 3 to 8, and along the moving direction of the materials, the top of the 1 st chamber is provided with a feed inlet and is not provided with an oxidant adding device and an ultraviolet light source, the top of the last chamber is provided with an ultraviolet light source, and the top of the middle chamber is provided with an oxidant adding device and an ultraviolet light source. In the preferred embodiment, the soil to be restored and the required additives are added into the 1 st chamber through the feeding hole 1, and the soil to be restored and the additives are fully mixed under the action of the soil conveying equipment 4; then, the mixture of the soil to be repaired and the additive is in contact with the oxidant added by the oxidant adding equipment 5 in the middle chamber under the irradiation of the ultraviolet light source 6, and the ultraviolet light emitted by the ultraviolet light source acts on the oxidant to excite the oxidant to generate high-activity free radicals, so that the high-activity free radicals are subjected to oxidation reaction with petroleum hydrocarbon in the soil to be repaired; in the last chamber, the ultraviolet light irradiated by the ultraviolet light source 6 further fully acts on the oxidant and the additive in the soil to be restored, so that the oxidation treatment is more fully performed.
Preferably, the top of the horizontal reaction bin 10 is provided with an air outlet 8. Volatile gases, such as volatile organic compounds, which are generated during the treatment of the soil to be remediated can be removed through the gas outlet 8. By connecting the gas outlet 8 with the collecting device, the volatile gas can be recovered. Further preferably, when the horizontal reaction chamber 10 is a plurality of chambers, the gas outlet 8 may be disposed in any one or more chambers except the 1 st chamber, preferably all chambers except the 1 st chamber.
In a preferable case, in each middle chamber except for the 1 st chamber and the last chamber among the plurality of chambers of the horizontal reaction chamber 10, an oxidant adding device 5, an ultraviolet light source 6 and an air outlet 8 are arranged at the top. Moreover, the oxidant adding equipment 5, the ultraviolet light source 6 and the air outlet 8 are sequentially arranged according to the moving direction of the materials. In the last chamber, an ultraviolet light source 6 and an air outlet 8 are arranged at the top, and the air outlet 8 is arranged at the downstream of the ultraviolet light source 6.
In a preferred case, one or more of the oxidant adding apparatuses 5 may be provided in each of the middle chambers except for the 1 st chamber and the last chamber among the plurality of chambers of the horizontal reaction chamber 10. Preferably, a plurality of oxidant dosing devices 5, for example, 3 or more oxidant dosing devices 5, may be provided in the 2 nd chamber, so that the oxidant can react more fully during the subsequent delivery process.
Preferably, the outlet of the oxidant feeding device 5 is provided as a spray head. It is further preferred that the outlet of the oxidant dosing device 5 is provided as a water mist nozzle with a droplet diameter of less than 1mm, such that the nozzle produces droplets of oxidant small enough to be in sufficient contact with organic contaminants, such as petroleum hydrocarbons, in the soil to be remediated.
Further, the ultraviolet light source 6 may be an ultraviolet lamp. The ultraviolet lamp is preferably an ultraviolet lamp tube. The outside of the ultraviolet lamp tube can be packaged by a quartz tube so as to isolate water vapor in the bin. And the ultraviolet light source 6 is preferably an ultraviolet light source with the wavelength of 200 and 280 nm.
In the invention, the soil conveying equipment 4 can be conventional equipment capable of realizing continuous conveying, so that the petroleum hydrocarbon polluted soil remediation device can realize continuous treatment on the petroleum hydrocarbon polluted soil. Preferably, the soil conveying device 4 is a screw conveying device, and the screw conveying device can sufficiently mix the additive, the oxidant and the soil through the action of a conveying screw in the process of continuously conveying the soil, so that the oxidation reaction process can be more efficiently performed. Further preferably, in the spiral conveying device, the spiral diameter of the spiral conveying device is 200-500 mm. The auger apparatus may be driven by a motor 3.
In another aspect, the present invention provides a method for remediating petroleum hydrocarbon contaminated soil using the above apparatus, comprising:
adding petroleum hydrocarbon polluted soil and additives into the horizontal reaction bin, and continuously conveying the soil and the additives through soil conveying equipment 4;
under the irradiation of the ultraviolet light source 6, the oxidant provided by the oxidant feeding device 5 is mixed and contacted with the mixture of the petroleum hydrocarbon polluted soil and the additive.
In the method, the soil conveying equipment 4 is used for continuous conveying, SO that the polluted soil can be continuously treated, and the oxidant can be excited to generate free radicals with stronger oxidability (such as HO and SO) through the irradiation of the ultraviolet light source4·-Etc.), the free radicals can efficiently oxidize petroleum hydrocarbon pollutants, thereby reducing the dosage of the oxidant and avoiding the generation of the added transition metal catalystSecondary pollution of (2).
In the present invention, the additive may be one or more of citrate, oxalate, tartrate and malate. The citrate, oxalate, tartrate and malate salts may each be a potassium salt, a sodium salt, more preferably a sodium salt, i.e. the additive is preferably one or more of sodium citrate, sodium oxalate, sodium tartrate and sodium malate.
In the present invention, the additive may be used in an amount of 0.5 to 2.5% by weight, preferably 0.8 to 1.5% by weight, relative to 100 parts by weight of the dry weight of the petroleum hydrocarbon-contaminated soil.
In the present invention, the oxidizing agent may be a substance capable of generating radicals under ultraviolet light irradiation. Preferably, the oxidizing agent is at least one of hydrogen peroxide and persulfate. The persulfate is preferably sodium persulfate.
In the present invention, the amount of the oxidizing agent may be 0.2 to 2.0mol, preferably 0.5 to 1.2mol, per gram of the petroleum hydrocarbon contaminated soil.
In the invention, the irradiation dose of the ultraviolet light source can be 300-3000J/m2Preferably 500-2. Herein, the irradiation dose unit "J/m" of the ultraviolet light source 62"means the amount of ultraviolet light used per square meter of the upper surface area of the petroleum hydrocarbon-contaminated soil exposed to ultraviolet light, and in the case where the horizontal reaction chamber has a plurality of chambers, the irradiation dose of the ultraviolet light source 6 means the irradiation dose of the ultraviolet light source provided correspondingly in each chamber.
In the present invention, when the soil transporting apparatus 4 is a screw transporting apparatus, the screw rotating speed of the screw transporting apparatus may be 20 to 100r/min, preferably 30 to 50 r/min.
In the present invention, the residence time of the petroleum hydrocarbon contaminated soil in the horizontal reaction bin 10 may be 10 to 120min, preferably 20 to 60 min.
In the present invention, the total petroleum hydrocarbon concentration of the petroleum hydrocarbon contaminated soil may be 1000-10000 mg/kg.
Examples
The present invention will be described in more detail with reference to the following examples, but the scope of the present invention is not limited thereto.
In the following examples, the remediation method for the soil contaminated by petroleum hydrocarbon is implemented in the equipment shown in fig. 1, and the specific implementation process comprises the following steps: the petroleum hydrocarbon polluted soil and the additive enter a chamber 1 of a horizontal reaction chamber 10 which is separated by a partition plate 2 from a feed inlet 1; premixing the soil under the stirring of a soil conveying device 4 driven by a motor 3; the soil conveying equipment 4 pushes the polluted soil to move forward at a certain speed; adding an oxidant solution from an oxidant adding device 5 at the upper part of the horizontal reaction bin 10 from the 2 nd chamber; irradiating polluted soil by using an ultraviolet light source 6 arranged in a quartz tube 7 at the upper part of a horizontal reaction bin 10, and exciting an oxidant by using ultraviolet light to generate high-activity free radicals to perform oxidation reaction with petroleum hydrocarbon in the soil; volatile gas generated in the treatment process is discharged and collected from a gas outlet 8 at the upper part of the horizontal reaction bin 10 and then enters subsequent gas treatment equipment; the obtained restored soil is discharged out of the horizontal reaction bin 10 through a discharge hole 9.
In the following examples and comparative examples, the total petroleum hydrocarbon concentration in soil was measured by infrared spectrophotometry with reference to HJ 637-2012 after extraction with carbon tetrachloride according to US EPA 3550C.
Example 1
Treating soil having a total petroleum hydrocarbon concentration of about 5000mg/kg according to the above embodiment; the additive is sodium citrate, and the adding amount is 1.0 weight percent (relative to 100 weight parts of the dry weight of the petroleum hydrocarbon polluted soil); the oxidant is hydrogen peroxide, and the dosage of the oxidant is 0.8mol relative to the amount of each gram of petroleum hydrocarbon in the petroleum hydrocarbon polluted soil; the ultraviolet irradiation dose is 1500J/m2(ii) a The spiral rotating speed is 40 r/min; the retention time is 50 min; the total petroleum hydrocarbon concentration of the soil after 3d of curing is 450 mg/kg.
Example 2
Treating soil having a total petroleum hydrocarbon concentration of about 4000mg/kg according to the above embodiment; the additive is sodium oxalate, and the adding amount is 1.2 wt% (relative to 100 parts by weight of the dry weight of the petroleum hydrocarbon polluted soil); the oxidant being peroxyHydrogen is added, and the adding amount of the oxidant is 1.0mol/g relative to the amount of each gram of petroleum hydrocarbon in the petroleum hydrocarbon polluted soil; the ultraviolet irradiation dose is 1800J/m2(ii) a The spiral rotating speed is 50 r/min; the retention time is 60 min; the total petroleum hydrocarbon concentration of the soil after 3d curing is 320 mg/kg.
Example 3:
treating soil having a total petroleum hydrocarbon concentration of about 3000mg/kg according to the above embodiment; the additive is sodium citrate and sodium oxalate with the weight ratio of 1:1, and the adding amount is 0.6 wt% (relative to the dry weight of the petroleum hydrocarbon polluted soil of 100 parts by weight); the oxidant is sodium persulfate, and the adding amount of the oxidant is 1.2mol/g relative to the amount of each gram of petroleum hydrocarbon in the petroleum hydrocarbon polluted soil; the ultraviolet irradiation dose is 1000J/m2(ii) a The spiral rotating speed is 20 r/min; the retention time is 40 min; the total petroleum hydrocarbon concentration of the soil after 3d of maintenance is 480 mg/kg.
Example 4:
treating soil having a total petroleum hydrocarbon concentration of about 2000mg/kg according to the above embodiment; the additive is sodium oxalate, and the adding amount is 0.5 weight percent (relative to 100 weight parts of dry weight of the petroleum hydrocarbon polluted soil); the oxidant is sodium persulfate, and the adding amount of the oxidant is 1.5mol/g relative to the amount of each gram of petroleum hydrocarbon in the petroleum hydrocarbon polluted soil; the ultraviolet irradiation dose is 1200J/m2(ii) a The spiral rotating speed is 80 r/min; the retention time is 20 min; the total petroleum hydrocarbon concentration of the soil after 3d of curing is 490 mg/kg.
Example 5:
treating soil having a total petroleum hydrocarbon concentration of about 8000mg/kg, in accordance with the above embodiments; the additive is sodium citrate, and the adding amount is 1.5 weight percent (relative to 100 weight parts of the dry weight of the petroleum hydrocarbon polluted soil); the oxidant is potassium persulfate, and the adding amount of the oxidant is 2.0mol/g relative to the amount of each gram of petroleum hydrocarbon in the petroleum hydrocarbon polluted soil; the ultraviolet irradiation dose is 500J/m2(ii) a The spiral rotating speed is 70 r/min; the retention time is 100 min; the total petroleum hydrocarbon concentration of the soil after 3d curing is 2230 mg/kg.
Example 6:
according to the above embodiment, the total petroleum hydrocarbon concentration is about 10000mg/kgSoil; the additive is sodium oxalate, and the adding amount is 1.4 wt% (relative to 100 parts by weight of dry weight of the petroleum hydrocarbon polluted soil); the oxidant is potassium persulfate, and the adding amount of the oxidant is 1.8mol/g relative to the amount of each gram of petroleum hydrocarbon in the petroleum hydrocarbon polluted soil; the ultraviolet irradiation dose is 2000J/m2(ii) a The spiral rotating speed is 40 r/min; the repairing retention time is 120 min; the total petroleum hydrocarbon concentration of the soil after 3d of curing is 1820 mg/kg.
Example 7:
treating soil having a total petroleum hydrocarbon concentration of about 5000mg/kg according to the above embodiment; the additive is sodium tartrate, and the adding amount is 1.2 wt% (relative to 100 parts by weight of the dry weight of the petroleum hydrocarbon polluted soil); the oxidant is hydrogen peroxide, and the dosage of the oxidant is 0.6mol/g relative to the amount of each gram of petroleum hydrocarbon in the petroleum hydrocarbon polluted soil; the ultraviolet irradiation dose is 2500J/m2(ii) a The spiral rotating speed is 40 r/min; the retention time is 40 min; the total petroleum hydrocarbon concentration of the soil after 3d of curing is 680 mg/kg.
Example 8:
treating soil having a total petroleum hydrocarbon concentration of about 5000mg/kg according to the above embodiment; the additive is sodium malate, and the adding amount is 1.1 wt% (relative to the dry weight of 100 parts by weight of the petroleum hydrocarbon polluted soil); the oxidant is sodium persulfate, and the adding amount of the oxidant is 1.2mol/g relative to the amount of each gram of petroleum hydrocarbon in the petroleum hydrocarbon polluted soil; the ultraviolet irradiation dose is 2000J/m2(ii) a The spiral rotating speed is 40 r/min; the retention time is 40 min; the total petroleum hydrocarbon concentration of the soil after 3d curing is 640 mg/kg.
Example 9:
treating soil having a total petroleum hydrocarbon concentration of about 4000mg/kg according to the above embodiment; the additive is sodium oxalate, and the adding amount is 2.5 wt% (relative to the dry weight of the petroleum hydrocarbon polluted soil of 100 parts by weight); the oxidant is sodium persulfate, and the adding amount of the oxidant is 2.0mol/g relative to the amount of each gram of petroleum hydrocarbon in the petroleum hydrocarbon polluted soil; the ultraviolet irradiation dose is 300J/m2(ii) a The spiral rotating speed is 100 r/min; the retention time is 10 min; the total petroleum hydrocarbon concentration of the soil after 3d curing is 1530 mg/kg.
Comparative example 1:
the procedure of example 1 was followed except that comparative example 1 did not include UV light and the treated soil had a total petroleum hydrocarbon concentration of 3580 mg/kg.
Comparative example 2
The procedure of example 1 was followed except that comparative example 2 was conducted without adding an oxidizing agent and the total petroleum hydrocarbon concentration of the treated soil was 4870 mg/kg.
Comparative example 3
The procedure of example 1 was followed except that comparative example 3 was carried out without the addition of additives and the total petroleum hydrocarbon concentration of the treated soil was 4230 mg/kg.
Comparative example 4:
treating soil having a total petroleum hydrocarbon concentration of about 5000mg/kg according to the above embodiment; the additive is sodium oxalate, and the adding amount is 1.2 percent; the oxidant is sodium persulfate, and the adding amount is 1.0 mol/g; ultraviolet irradiation is not carried out; the spiral rotating speed is 40 r/min; the retention time is 60 min; the total petroleum hydrocarbon concentration of the soil after 3d of maintenance is 3730 mg/kg.
TABLE 1
Through comparison between the examples and the comparative examples, the oxidation effect on petroleum hydrocarbon pollutants is obviously enhanced through the action between ultraviolet light and the oxidant, and the dosage of the oxidant is reduced; and because the used oxidant does not need a transition metal catalyst, the secondary pollution caused by the transition metal catalyst is avoided.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (24)
1. A petroleum hydrocarbon contaminated soil remediation device, the device comprising:
a horizontal reaction bin;
the oxidant feeding equipment is arranged at the upper part of the horizontal reaction bin;
the ultraviolet light source is arranged at the upper part of the horizontal reaction bin; and
the soil conveying equipment is arranged at the bottom of the horizontal reaction bin;
wherein, the upper part of the horizontal reaction bin is provided with a feed inlet for adding soil and additives; the lower part of the horizontal reaction bin is provided with a discharge hole for discharging soil;
the additive is one or more of citrate, oxalate, tartrate and malate; the oxidant is at least one of hydrogen peroxide and persulfate.
2. The apparatus of claim 1, wherein the horizontal reaction chamber comprises a plurality of chambers.
3. The device according to claim 2, wherein the horizontal reaction chamber comprises n chambers, n is 3-8, and along the moving direction of the materials, the top of the 1 st chamber is provided with a feed inlet and is not provided with an oxidant adding device and an ultraviolet light source, the top of the last chamber is provided with an ultraviolet light source, and the top of the middle chamber is provided with an oxidant adding device and an ultraviolet light source.
4. The device according to any one of claims 1 to 3, wherein the top of the horizontal reaction bin is provided with an air outlet.
5. The apparatus according to any one of claims 1 to 3, wherein the outlet of the oxidant dosing device is provided as a spray head.
6. The apparatus of claim 5, wherein the spray head is a water mist spray head having a water droplet diameter of less than 1 mm.
7. The apparatus of any one of claims 1-3, wherein the ultraviolet light source is an ultraviolet lamp.
8. The apparatus as claimed in claim 7, wherein the ultraviolet light source is an ultraviolet lamp with a wavelength of 200 and 280 nm.
9. An apparatus according to any one of claims 1 to 3, wherein the soil transport device is a screw transport device.
10. The apparatus as claimed in claim 9, wherein the screw has a screw diameter of 200-500 mm.
11. A method of remediating petroleum hydrocarbon contaminated soil using the apparatus of any one of claims 1-10, comprising:
adding petroleum hydrocarbon polluted soil and additives into the horizontal reaction bin, and continuously conveying the soil and the additives through soil conveying equipment;
under the irradiation of an ultraviolet light source, the oxidant provided by the oxidant feeding equipment is mixed and contacted with the mixture of the petroleum hydrocarbon polluted soil and the additive.
12. The method of claim 11, wherein the additive is one or more of citrate, oxalate, tartrate and malate.
13. The method of claim 12, wherein the additive is used in an amount of 0.5 to 2.5 weight percent, relative to 100 parts by weight of the dry weight of the petroleum hydrocarbon contaminated soil.
14. The method of claim 13, wherein the additive is present in an amount of 0.8 to 1.5 wt.%.
15. The method of claim 11, wherein the oxidizing agent is at least one of hydrogen peroxide and persulfate.
16. The method of claim 15, wherein the oxidizing agent is used in an amount of 0.2 to 2.0 moles per gram of petroleum hydrocarbon in the petroleum hydrocarbon contaminated soil.
17. The method of claim 16, wherein the oxidizing agent is used in an amount of 0.5 to 1.2 mol.
18. The method as claimed in claim 11, wherein the irradiation dose of the UV light source is 300-3000J/m2。
19. The method as claimed in claim 18, wherein the irradiation dose of the UV light source is 500-2000J/m2。
20. The method of claim 18, wherein when the soil transport apparatus is a screw transport apparatus, the screw speed of the screw transport apparatus is 20-100 r/min.
21. The method of claim 20, wherein the screw speed of the screw conveyor is 30-50 r/min.
22. The method of claim 18, wherein the residence time of the petroleum hydrocarbon contaminated soil in the horizontal reaction bin is 10-120 min.
23. The method of claim 22, wherein the residence time of the petroleum hydrocarbon contaminated soil in the horizontal reaction bin is 20-60 min.
24. The method as claimed in claim 18, wherein the total petroleum hydrocarbon concentration of the petroleum hydrocarbon contaminated soil is 1000-10000 mg/kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710685651.2A CN109382404B (en) | 2017-08-11 | 2017-08-11 | Petroleum hydrocarbon polluted soil remediation device and remediation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710685651.2A CN109382404B (en) | 2017-08-11 | 2017-08-11 | Petroleum hydrocarbon polluted soil remediation device and remediation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109382404A CN109382404A (en) | 2019-02-26 |
| CN109382404B true CN109382404B (en) | 2021-08-03 |
Family
ID=65414512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710685651.2A Active CN109382404B (en) | 2017-08-11 | 2017-08-11 | Petroleum hydrocarbon polluted soil remediation device and remediation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109382404B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111530908B (en) * | 2020-05-09 | 2021-08-31 | 中国石油大学(华东) | Combined treatment method for petroleum-polluted soil |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0512315A2 (en) * | 1991-05-09 | 1992-11-11 | Ultra Systems Gmbh Uv-Oxidation | Process and apparatus for decontaminating contaminated solids |
| CN104607456A (en) * | 2014-12-19 | 2015-05-13 | 中国环境科学研究院 | A remediation method for soil polluted by chlorobenzenes |
| CN105537262A (en) * | 2016-01-14 | 2016-05-04 | 杨俊锋 | Photocatalysis soil remediation device |
| CN105834207A (en) * | 2016-05-20 | 2016-08-10 | 上海化工研究院 | Method for combined remediation of organic matter polluted soil |
| CN106493166A (en) * | 2016-12-26 | 2017-03-15 | 上海岩土工程勘察设计研究院有限公司 | A kind of ultraviolet light ozone combines the contaminated soil remediation system adopting recirculating of catalysis oxidation |
-
2017
- 2017-08-11 CN CN201710685651.2A patent/CN109382404B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0512315A2 (en) * | 1991-05-09 | 1992-11-11 | Ultra Systems Gmbh Uv-Oxidation | Process and apparatus for decontaminating contaminated solids |
| CN104607456A (en) * | 2014-12-19 | 2015-05-13 | 中国环境科学研究院 | A remediation method for soil polluted by chlorobenzenes |
| CN105537262A (en) * | 2016-01-14 | 2016-05-04 | 杨俊锋 | Photocatalysis soil remediation device |
| CN105834207A (en) * | 2016-05-20 | 2016-08-10 | 上海化工研究院 | Method for combined remediation of organic matter polluted soil |
| CN106493166A (en) * | 2016-12-26 | 2017-03-15 | 上海岩土工程勘察设计研究院有限公司 | A kind of ultraviolet light ozone combines the contaminated soil remediation system adopting recirculating of catalysis oxidation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109382404A (en) | 2019-02-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102641644B (en) | Waste gas treatment air purification device | |
| US10751770B2 (en) | Remediation of contaminated soil and water using enhanced stimulators | |
| CN104958990A (en) | Photoelectric integrated processing device and photoelectric integrated processing technique for waste gases generated by spraying paint | |
| CN106861389A (en) | A kind of VOC off-gas cleaning equipments and purification method | |
| US4882021A (en) | Apparatus and method for soil decontamination | |
| JP2012161768A (en) | Apparatus for cleaning contaminated soil and method for cleaning soil | |
| CN109382404B (en) | Petroleum hydrocarbon polluted soil remediation device and remediation method | |
| KR101705544B1 (en) | A contaminated water treatment system and method for treating water using the same | |
| KR20090008960U (en) | The remediation of soil contaminated with oil and a heavy metal using Microwave and high temperature heating source | |
| CN209155498U (en) | The ultraviolet synergy ozone catalytic oxidation treatment volatile organic matter device of micro-wave nonpolar | |
| JP2007190544A (en) | Sulfate pitch treatment method, its apparatus, and neutralization apparatus | |
| KR100736248B1 (en) | Apparatus for controlling odor and hydrocarbons in exhaust air stream in tire manufacturing plant | |
| CN205442858U (en) | Ozone air floating recycling treatment device | |
| JP3699055B2 (en) | Equipment for decomposing gaseous organic compounds | |
| CN107344740A (en) | A kind of technique and method of low-temperature plasma processing high-concentration sewage | |
| JP3990993B2 (en) | Method and apparatus for decomposing persistent organic compounds | |
| CN210711060U (en) | Process system for jointly treating water and soil in polluted site | |
| CN110539417A (en) | Rubber particle production process | |
| CN110125165B (en) | Ectopic remediation process for VOCs/SVOCs contaminated soil | |
| JP2003211143A (en) | Device for cleaning soil | |
| JP2000334062A (en) | Microwave-solvothermal treatment of harmful organic compound | |
| CN104548897B (en) | The multiple purifying system of organic exhaust gas | |
| JP3880962B2 (en) | How to handle hazardous substances | |
| JP2010075883A (en) | Cleaning method of contaminated soil and groundwater | |
| US20080262283A1 (en) | Process for the removal of hydrocarbons from soils |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |