CN215543678U - Normal temperature desorption system of volatile organic contaminated soil - Google Patents
Normal temperature desorption system of volatile organic contaminated soil Download PDFInfo
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- CN215543678U CN215543678U CN202121789761.1U CN202121789761U CN215543678U CN 215543678 U CN215543678 U CN 215543678U CN 202121789761 U CN202121789761 U CN 202121789761U CN 215543678 U CN215543678 U CN 215543678U
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Abstract
The utility model discloses a normal-temperature desorption system for volatile organic contaminated soil, which comprises a workshop ground and a workshop area, wherein the workshop area comprises gas distribution plates and a top plate, a turning area is arranged between the two gas distribution plates, a turning machine is arranged in the turning area, and a pretreatment area and a temporary storage area are arranged in the workshop area. The technology can rapidly treat the polluted soil, has small damage to the physical characteristics of the soil in the repairing process, and does not influence the utilization of the soil after repairing; no wastewater is generated in the repairing process, so that no wastewater treatment is needed, and the problem of secondary pollution of wastewater is avoided; chemical agents are not used or are rarely used in the repairing process, and secondary pollution of the chemical agents is avoided; the normal temperature desorption system adopts the membrane structure big-arch shelter, and the sealing performance is good, no secondary pollution, and the inside ventilation facility that sets up of membrane structure big-arch shelter makes the efficiency of getting rid of pollutant in soil and the air improve more than 5% to can guarantee the interior operation personnel's of canopy safety.
Description
Technical Field
The utility model relates to the field of soil pollution remediation, in particular to a normal-temperature desorption system for volatile organic polluted soil.
Background
In recent years, along with the migration and reconstruction of a large number of industrial fields, the problem of organic pollution of soil gradually floats out of water, the pollutants are continuously migrated and transformed and enter human bodies through respiratory tracts, digestive tracts and the like, great threat is formed to the human bodies, and the remediation of the organic pollution soil becomes a problem of attention of people. The organic pollution site repairing technology mainly comprises in-situ chemical oxidation and ex-situ chemical oxidation. In-situ remediation, namely in-situ injecting an oxidant into a polluted area of soil/underground water for remediation, if humic acid, reducing metal and other substances exist in the soil, a large amount of oxidant is consumed, in an area with poor permeability (such as clay), the transmission rate of the agent is possibly slow, and adverse effects such as heat production, gas production and the like can occur in the oxidation process. Meanwhile, the reaction is greatly influenced by the pH value. Ectopic remediation is to excavate contaminated soil and transfer the contaminated soil to ectopic remediation. Various remediation agents are added according to the type of the polluted soil, and ventilation and oxygen supply are carried out on the polluted soil to ensure the remediation effect. However, there are some technical defects in engineering application, such as complicated operation, high cost, easy generation of waste gas, and easy secondary pollution. Therefore, the ordinary temperature desorption system for the volatile organic contaminated soil is provided by the technical personnel in the field, so as to solve the problems in the background technology.
SUMMERY OF THE UTILITY MODEL
The utility model can be applied to the treatment of volatile and semi-volatile organic polluted soil in a large scale. The soil is turned and thrown for many times in a room temperature desorption workshop with good tightness, volatile/semi-volatile organic compounds in the polluted soil are volatilized, the concentration of the organic compounds in the soil is reduced or the purpose of repairing the polluted soil is achieved, the volatilized gas is collected through the room temperature desorption workshop, and then tail gas treatment is carried out. The method has the advantages of simple process, strong operability and low treatment cost, and can effectively treat the volatile/semi-volatile organic polluted soil with medium and low concentration so as to solve the problems in the background technology.
In order to achieve the purpose, the utility model provides the following technical scheme:
a normal-temperature desorption system for volatile organic contaminated soil comprises a workshop ground and a workshop area, wherein the workshop area comprises gas distribution plates and a top plate, a turning and throwing area is arranged between the two gas distribution plates, a turning and throwing machine is arranged in the turning and throwing area, a pretreatment area and a temporary storage area are arranged in the workshop area, and a tipping bucket is arranged on one side of the temporary storage area;
the utility model discloses a gas bag dust collector, including gas distribution plate, blast pipe, workshop district, air exhauster, air exhaust pipe, bag dust remover, active carbon adsorption tower, air exhaust pipe, air exhauster, air blower, blast pipe, air blower, workshop district left side is provided with transport vehicle, the gas distribution plate right side is connected with exhaust pipe right side and is connected with the air exhauster, and the right side of air exhauster is connected with gaseous collecting pipeline, and the bag dust remover is installed on gaseous collecting pipeline right side, and the active carbon adsorption tower is installed to bag dust remover top.
As a further scheme of the utility model: the air distribution plate is provided with air distribution holes, the distance between the holes is five to ten centimeters, and the diameter is two to four centimeters.
As a still further scheme of the utility model: the workshop ground is made of wear-resistant metal aggregate ground, the workshop area is made of steel columns for supporting and stretching the PVDF membrane structure, the top plates are of circular arc structures, and the solar auxiliary heating system is adopted for the top plates.
Compared with the prior art, the utility model has the beneficial effects that:
1. the technology can rapidly treat the polluted soil, has small damage to the physical characteristics of the soil in the repairing process, and does not influence the utilization of the soil after repairing.
2. The repairing process does not generate wastewater, so that the wastewater treatment is not needed, and the problem of secondary pollution of the wastewater is not generated.
3. Chemical agents are not used or are rarely used in the repairing process, and secondary pollution of the chemical agents is avoided.
4. The normal temperature desorption system adopts the membrane structure big-arch shelter, and the sealing performance is good, no secondary pollution, and the inside ventilation facility that sets up of membrane structure big-arch shelter makes the efficiency of getting rid of pollutant in soil and the air improve more than 5% to can guarantee the interior operation personnel's of canopy safety.
5. The buried coil system can be arranged at the bottom of the film-structure greenhouse, circulating hot water is introduced into the buried coil through the solar auxiliary heating system to heat soil, the room temperature in the greenhouse can be increased by 5-10 ℃ compared with the external temperature, volatilization of organic matters is promoted, the soil remediation efficiency is improved, and the remediation time is shortened by more than half.
6. The room temperature desorption greenhouse can be used as a pretreatment workshop for volatile polluted soil or other solid wastes, such as a pretreatment workshop for disposing the solid wastes by a cement kiln system.
Drawings
FIG. 1 is a flow structure diagram of a normal temperature desorption system for VOC contaminated soil.
Fig. 2 is a schematic structural diagram of a gas distribution plate in a normal temperature desorption system for volatile organic contaminated soil.
In the figure: 1. a workshop floor; 2. a workshop area; 3. an exhaust fan; 4. a bag-type dust collector; 5. a gas collection conduit;
6. an activated carbon adsorption tower; 7. an air exhaust pipe; 8. a pretreatment region; 9. a top plate; 10. a temporary storage area; 11. tipping;
12. a transport vehicle; 13. a gas distribution plate; 14. a blower; 15. a blast pipe; 16. a turning area; 17. turning the throwing machine;
18. and (5) air distribution holes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, in the embodiment of the utility model, a normal temperature desorption system for volatile organic contaminated soil is provided, wherein a workshop floor 1 is a wear-resistant metal aggregate floor, a workshop area 2 is of a steel column supporting and tensioning PVDF membrane structure, an arc structure is formed between top plates 9, the top plates 9 are of a solar auxiliary heating system, air distribution holes 18 are formed in an air distribution plate 13, the hole spacing is 5-10 cm, the diameter is 2-4cm, an air blower 14 is installed on the left side, the left side of the air distribution plate is connected to the air distribution plate 13 through an air blowing pipe 15, fresh air is input into the closed workshop 2, and a right side exhaust pipe 7 is connected to an exhaust fan 3;
the left side of the gas collecting pipeline 5 is connected to an exhaust port of the exhaust fan 3, the right side of the gas collecting pipeline 5 is connected to the bag-type dust remover 4, organic gas in the closed workshop 2 can be pumped out to a gas treatment system through the exhaust fan 3 to be treated, and the gas treatment system comprises the bag-type dust remover 4 and an active carbon adsorption tower 6;
the inside temporary storage area 10, the preliminary treatment district 8 of being provided with in workshop district 2, haulage vehicle 12 will pollute soil and transport to temporary storage area 10 from the clear scene of digging outside the workshop, empty tipping bucket 11 and make soil fall down, and the broken fill of screening in preliminary treatment district 8 carries out screening crushing preliminary treatment operation to polluting soil, shifts to turning over throwing district 16, utilizes turning over throwing machine 17 to carry out artificial disturbance and the throwing to the polluted soil that the rule was put things in good order.
The working principle of the utility model is as follows:
the interior of the room temperature desorption workshop can be subdivided into a contaminated soil temporary storage area, a turning and throwing area and a treated soil temporary storage area.
And selecting a proper workshop area 2 in the normal-temperature desorption system as a centralized treatment area. Independent of non-pollution site, no leakage and tail gas treating system. The method comprises the steps that a sealed transport vehicle 12 transports polluted soil into a normal-temperature desorption system, the polluted soil is poured into a temporary storage area 10 to be stacked into a strip stack shape, the temperature in the system is kept within a certain range through a solar auxiliary heating system, then, in the sealed system, a turner is used for manually disturbing and turning the regularly stacked polluted soil, the porosity is increased by increasing the contact area of the polluted soil and air, the water content of the soil is reduced and the permeability of the soil is increased through the turner 17, pollutants are volatilized into soil gas under the drive of concentration gradient, the treated soil is subjected to field rapid test and GC-MS further analysis test through PID, and the treated soil is transported to a temporary stacking area to be stacked after reaching a corresponding repairing target value and finally disposed.
Under the condition of good permeability, the pollutants adsorbed in the soil are volatilized into soil gas under the driving of concentration gradient by using an air pumping system, so that the soil is repaired. The volatilized waste gas is collected in a centralized way by an air extraction system and is conveyed to a bag-type dust collector 4 and an active carbon adsorption tower 6, and the gas after adsorption and purification is finally discharged up to the standard by an exhaust funnel induced by an exhaust fan.
Mainly comprises the following processing stages:
1. excavating soil: and determining a polluted soil area, and treating in different areas. The excavated soil is placed in the temporary storage area 10.
2. Soil pretreatment: the soil pretreatment comprises screening and crushing of soil particles and proper addition of water to control the water content of the soil to be in a certain range.
3. Adding quicklime to heat soil: by adding a certain amount of quicklime into the soil, the quicklime and the water in the soil are subjected to exothermic reaction, so that the temperature in the soil is increased, and the decomposition of VOCs organic pollutants at room temperature is facilitated.
4. Turning and aerating soil: the soil is continuously turned and thrown by the screening and crushing bucket for 3-4 times, so that soil particles are fully contacted with air, the decomposition reaction is facilitated, and the aim of reducing the concentration of VOCs in the soil is fulfilled.
5. Soil transfer: and transferring the treated soil to a soil to be detected area, waiting for sampling detection, and after the detection is finished, conveying the qualified soil out for reasonable treatment.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.
Claims (3)
1. A normal-temperature desorption system for volatile organic contaminated soil comprises a workshop ground (1) and a workshop area (2), and is characterized in that the workshop area (2) comprises gas distribution plates (13) and a top plate (9), a turning and polishing area (16) is arranged between the two gas distribution plates (13), a turning and polishing machine (17) is arranged in the turning and polishing area (16), a pretreatment area (8) and a temporary storage area (10) are arranged in the workshop area (2), and a tipping bucket (11) is arranged on one side of the temporary storage area (10);
the utility model discloses a gas distribution plate, including gas distribution plate (13), blast pipe (15), air-blower (14), workshop district (2) left side is provided with transport vehicle (12), gas distribution plate (13) right side is connected with exhaust tube (7) right side and is connected with air exhauster (3), and the right side of air exhauster (3) is connected with gas collection pipeline (5), and sack cleaner (4) are installed to gas collection pipeline (5) right side, and active carbon adsorption tower (6) are installed to sack cleaner (4) top.
2. The normal-temperature desorption system for volatile organic contaminated soil according to claim 1, wherein the gas distribution plate (13) is provided with gas distribution holes (18), the distance between the holes is five to ten centimeters, and the diameter is two to four centimeters.
3. The normal-temperature desorption system for volatile organic polluted soil according to claim 1, wherein the workshop floor (1) is a wear-resistant metal aggregate floor, the workshop area (2) is of a steel column supporting and tensioning PVDF membrane structure, the top plates (9) are of an arc structure, and the top plates (9) are of a solar auxiliary heating system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121789761.1U CN215543678U (en) | 2021-08-03 | 2021-08-03 | Normal temperature desorption system of volatile organic contaminated soil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121789761.1U CN215543678U (en) | 2021-08-03 | 2021-08-03 | Normal temperature desorption system of volatile organic contaminated soil |
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| CN215543678U true CN215543678U (en) | 2022-01-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115351057A (en) * | 2022-07-12 | 2022-11-18 | 中国瑞林工程技术股份有限公司 | Soil remediation method for normal-temperature enhanced desorption |
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2021
- 2021-08-03 CN CN202121789761.1U patent/CN215543678U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115351057A (en) * | 2022-07-12 | 2022-11-18 | 中国瑞林工程技术股份有限公司 | Soil remediation method for normal-temperature enhanced desorption |
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