CN211637715U - A reinforce ventilation oxidation unit for handling VOC pollutes soil - Google Patents
A reinforce ventilation oxidation unit for handling VOC pollutes soil Download PDFInfo
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- CN211637715U CN211637715U CN201922201068.7U CN201922201068U CN211637715U CN 211637715 U CN211637715 U CN 211637715U CN 201922201068 U CN201922201068 U CN 201922201068U CN 211637715 U CN211637715 U CN 211637715U
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Abstract
The utility model discloses a reinforce ventilation oxidation unit for handling VOC pollutes soil, include: the closed greenhouse is internally provided with an air heater, an ozone generator, a closed covering heap, an ozone destructor and an induced draft fan, and a tail gas treatment device is arranged outside the closed greenhouse; the hot air blower blows the ozone generated by the ozone generator into the enclosed covering mound, and the ozone and the hot air finish the repair of the enclosed covering mound; then, collecting the gas blown out from the closed covering mound and entering an ozone destructor to destroy the unreacted ozone; and finally, the induced draft fan enables the gas collected in the closed greenhouse to enter a tail gas treatment device. The utility model adopts a closed system to reduce the risk of environmental pollution in excavation restoration; the advantages of the ex-situ oxidation process and the ex-situ thermal desorption process can be combined by the oxidation system and the heating air blast system; the method can obviously shorten the treatment time, obviously improve the repairing effect, obviously reduce the occupied area of the repairing field and obviously reduce the running cost.
Description
Technical Field
The utility model relates to a soil restoration technical field, concretely relates to reinforce ventilation oxidation unit for handling VOC pollutes soil is the ectopic repair mode who handles volatile organic compounds and pollutes soil.
Background
The current dystopy repair mode of handling volatile organic compounds and polluting soil includes two kinds of technologies of dystopy oxidation and dystopy thermal analysis, and wherein the normal atmospheric temperature is analytic generally in closed big-arch shelter through the contact between soil and the air that the increase pollutes, the volatile process in the increase pollutant is to the air, and volatile gaseous tail gas processing apparatus is collected through collecting system, utilizes the pollutant concentration reduction in the volatilization messenger soil to reach the purpose of restoreing soil. Ectopic oxidation generally adds an oxidizing agent to the soil that oxidizes the contaminants to non-toxic or relatively less toxic substances. Common oxidants include permanganate, peroxide, fenton's reagent, ozone, and the like.
The normal-temperature analysis needs to turn over and throw the soil, so that the contact area of the polluted soil and the air is enlarged, the pollutants enter the air flow to achieve the repairing effect, but the normal-temperature analysis does not change the properties of the pollutants, a strong tail gas treatment system is needed, the treatment cost is increased, and the treatment difficulty is increased. Ectopic chemical oxidation repairs soil by adding an oxidizing agent to oxidize pollutants into substances with low toxicity, but the ectopic oxidation is generally not uniform in treatment and too long in oxidation time, so that the operation cost is increased and the treatment effect is reduced.
Conventional desorption techniques require the establishment of a capture system based on the characteristics of the contaminant, such as the establishment of a basic collection tank for the contaminant when the contaminant is slightly acidic, and the establishment of an acidic collection tank for the contaminant when the contaminant is slightly basic. The conventional ex-situ oxidation system has too long treatment time and uneven oxidation effect, and easily causes high concentration of oxide aggregation in partial areas and low concentration of oxide aggregation in partial areas, thereby reducing the treatment effect.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects existing in the problems, the utility model provides an intensified ventilation and oxidation device for treating VOC contaminated soil, which combines the advantages of two processes of heterotopic oxidation and heterotopic thermal desorption and optimizes the treatment effect; the addition of the oxidation system solves the problem that pollutants are only blown off and are not degraded, and the addition of the heating and blowing system solves the problems of uneven treatment and too long oxidation time.
The utility model discloses a reinforce ventilation oxidation unit for handling VOC pollutes soil, include:
the device comprises a closed greenhouse, wherein an air heater, an ozone generator, a closed covering heap, an ozone destructor and an induced draft fan are arranged in the closed greenhouse, and a tail gas treatment device is arranged outside the closed greenhouse;
the air heater with ozone generator links to each other, ozone generator with it links to each other to seal to cover the mound, seal to cover the mound with the ozone destroyer links to each other, the ozone destroyer with the draught fan links to each other, the draught fan with tail gas processing apparatus links to each other.
As a further improvement of the utility model, the air heater blows the ozone generated by the ozone generator into the enclosed covering mound, and the ozone and the hot air finish the repair of the enclosed covering mound; then, collecting the gas blown out from the closed covering mound into the ozone destructor to destroy the unreacted ozone; and finally, the induced draft fan enables the gas collected in the closed greenhouse to enter the tail gas treatment device.
As a further improvement, the closed greenhouse is a negative-pressure greenhouse.
As a further improvement of the utility model, the air heater is an anti-oxidation air heater.
As a further improvement of the utility model, the particle size of the closed covering mound is less than 5 mm.
As a further improvement of the utility model, the tail gas treatment device consists of a bag-type dust collector and an activated carbon absorber.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a forced ventilation oxidation unit, which adopts a closed system to reduce the risk of environmental pollution in excavation and restoration; the advantages of the ex-situ oxidation process and the ex-situ thermal desorption process can be combined by the oxidation system and the heating air blast system; the method can obviously shorten the treatment time, obviously improve the repairing effect, obviously reduce the occupied area of the repairing field and obviously reduce the running cost.
Drawings
Fig. 1 is a schematic structural view of an enhanced aeration oxidation device for treating VOC contaminated soil according to an embodiment of the present invention.
In the figure:
1. closing the greenhouse; 2. a hot air blower; 3. an ozone generator; 4. an ozone destructor; 5. an induced draft fan; 6. A tail gas treatment device; A. and sealing and covering the mound.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1, the utility model provides a forced draft oxidation device for treating VOC contaminated soil, which is used for treating closed covering mound a; it includes: the device comprises a closed greenhouse 1, an air heater 2, an ozone generator 3, an ozone destructor 4, a draught fan 5 and a tail gas treatment device 6;
wherein:
the closed greenhouse 1, the air heater 2, the ozone generator 3, the ozone destructor 4, the draught fan 5, the tail gas treatment device 6 and the closed covering mound A have the following functions:
and (3) closing the greenhouse 1: the closed space for soil remediation is provided, so that the risk of environmental pollution in excavation remediation is reduced;
and (3) an air heater 2: heat is provided for the reaction to shorten the treatment time;
an ozone generator 3: providing an oxidant for soil remediation;
ozone destructor 4: treating unreacted ozone;
an induced draft fan 5: providing wind pressure for the whole set of system;
and (3) a tail gas treatment device 6: treating tail gas generated by the system;
and (3) sealing and covering the mound A: and covering a sealing layer on the turned and thrown mound to be a repairing object.
The arrangement and connection relations of the closed greenhouse 1, the air heater 2, the ozone generator 3, the ozone destructor 4, the draught fan 5, the tail gas treatment device 6 and the closed covering mound A are as follows:
an air heater 2, an ozone generator 3, a closed covering mound A, an ozone destructor 4 and a draught fan 5 are arranged in the closed greenhouse 1, and a tail gas treatment device 6 is arranged outside the closed greenhouse 1.
The air heater 2 links to each other with ozone generator 3, and ozone generator 3 links to each other with sealing and covering mound A, and sealing and covering mound A links to each other with ozone destroyer 4, and ozone destroyer 4 links to each other with draught fan 5, and draught fan 5 links to each other with tail gas processing apparatus 6.
The treatment processes of the closed greenhouse 1, the air heater 2, the ozone generator 3, the ozone destructor 4, the draught fan 5, the tail gas treatment device 6 and the closed covering mound A are as follows:
the hot air blower 2 blows the ozone generated by the ozone generator 3 into the enclosed covering mound A, and the ozone and the hot air finish the repair of the enclosed covering mound A; then, collecting the gas blown out from the closed covering mound A into an ozone destructor 4 to destroy the unreacted ozone; and finally, the induced draft fan 5 enables the gas collected in the closed greenhouse 1 to enter the tail gas treatment device 6.
Specifically, the method comprises the following steps:
the utility model discloses an air heater 2 adopts organic glass material anticorrosive, anti-oxidation, and one end links to each other with external atmosphere, one end links to each other with ozone generator 3, and air heater 2 is gone into after with the air heating in the atmosphere and is sealed to cover mound A in, later mixes with the ozone that ozone generator 2 produced. Furthermore, the material of the hot air blower 2 is made of FRP acid and alkali resistant Vinylester resin; further, the power of the hot air blower 2 is 7.5KW conventionally, the blast temperature is not lower than 50 ℃, and the wind speed is required to be 7000m3H, can work continuously for 24h, and one air heater can reach the treatment of 100m3And (5) the requirement of polluted soil.
The utility model discloses an ozone generator 3 is integrated device, including air treatment system, cooling system, electrical power generating system, ozone synthesis system, ozone generator's output 1kg/h, the ozone of production and the hot-blast mixed pump that 2 drums into of air heater go into to seal and cover mound A in. Further, the ozone generator is a high-voltage discharge type ozone generator, the single-machine yield is 1kg/h, and the ozone generator is correspondingly treated for 100m3And (5) continuously treating the polluted soil for 5 days. Further, the air treatment system of the ozone generator 3 further pumps the air after drying and filtering treatment into the ozone synthesis system by the compressor to provide oxygen for ozone synthesis. Further, the cooling system of the ozone generator 3 employs closed-loop circulation cooling for cooling the heat generated by the ozone generator. Further, the power supply system of the ozone generator 3 further adopts a medium-frequency power supply system, so that long-range and short-range control can be realized, online monitoring control of ozone concentration can be realized, automatic detection of gas flow and pressure can be realized, and automatic monitoring of temperature can be realized. Further, the ozone synthesis system of the ozone generator 3 is further constituted by a high voltage discharge chamber, and oxygen is synthesized into ozone in the high voltage discharge chamber.
The heap soil of the closed covering heap soil A of the utility model is turned and thrown by the turner, and the particle diameter of the soil is ensured to be less than 5 mm; the method has no requirement on soil humidity, no requirement on soil volume weight and good ventilation condition. Further, the soil pile is 3m in height, 6m in length, 1:1 in slope, less than 5mm in soil particle size and covered by a sealing layer; the front end of the closed covering heap soil A is connected with a blast inlet, and the hot air blower 2 mixes hot air and ozone generated by the ozone generator 3 into the soil heap; the rear end of the closed covering mound A is connected with a blast outlet, and the outlet is connected with an ozone destructor 4.
The ozone destructor 4 of the utility model requires that the concentration of the ozone given out is less than 0.1 ppm.
The utility model discloses a tail gas processing apparatus 6 comprises sack cleaner and active carbon absorber, and the sack cleaner gets into the filter bag with gaseous from bag collector entry, and dust passes the filter bag and is adsorbed on the filter material, and during the gaseous active carbon absorber that gets into from the filter bag that gets into of purification, when the dust reaches certain thickness, the solenoid valve opened, and the jetting air will adsorb in the dust cleanness to the ash bucket on the filter bag from filter bag exit top-down. Furthermore, the activated carbon adsorber adopts double-stage adsorption, ensures that the gas meets the emission standard after being adsorbed, has high adsorption efficiency, low operation cost and simple maintenance, and can simultaneously treat various mixed waste gases.
The whole construction steps of the strengthening ventilation oxidation device of the utility model are as follows:
constructing a negative-pressure closed greenhouse 1 according to the volume of the treated soil, then piling a soil pile in the negative-pressure closed greenhouse 1, wherein the soil pile is 3m in height, 6m in length, 1:1 in slope, less than 5mm in soil particle size, and covered by a closed layer to form closed covering pile soil A; the front end of the closed covering heap soil A is connected with a blast inlet, and the hot air blower 2 mixes hot air and ozone generated by the ozone generator 3 into the soil heap; the rear end of the closed covering mound A is connected with a blast outlet, the outlet is connected with an ozone destructor 4, the rear end of the ozone destructor 4 is connected with a draught fan 5, the draught fan 5 provides power for gas flowing, and tail gas generated by the whole greenhouse enters a tail gas treatment device 6.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. An enhanced aeration oxidation device for treating VOC contaminated soil, comprising:
the device comprises a closed greenhouse, wherein an air heater, an ozone generator, a closed covering heap, an ozone destructor and an induced draft fan are arranged in the closed greenhouse, and a tail gas treatment device is arranged outside the closed greenhouse;
the air heater with ozone generator links to each other, ozone generator with it links to each other to seal to cover the mound, seal to cover the mound with the ozone destroyer links to each other, the ozone destroyer with the draught fan links to each other, the draught fan with tail gas processing apparatus links to each other.
2. The forced draft oxidation unit according to claim 1, wherein said enclosed greenhouse is a negative pressure greenhouse.
3. The enhanced aeration oxidation unit of claim 1, wherein said air heater is an oxidation resistant air heater.
4. The enhanced aeration oxidation unit of claim 1, wherein the closed covering mound has a particle size of less than 5 mm.
5. The enhanced aeration oxidation unit of claim 1, wherein the tail gas treatment unit is comprised of a bag-type dust collector and an activated carbon adsorber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922201068.7U CN211637715U (en) | 2019-12-10 | 2019-12-10 | A reinforce ventilation oxidation unit for handling VOC pollutes soil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922201068.7U CN211637715U (en) | 2019-12-10 | 2019-12-10 | A reinforce ventilation oxidation unit for handling VOC pollutes soil |
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| CN211637715U true CN211637715U (en) | 2020-10-09 |
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| CN201922201068.7U Active CN211637715U (en) | 2019-12-10 | 2019-12-10 | A reinforce ventilation oxidation unit for handling VOC pollutes soil |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112517631A (en) * | 2020-11-27 | 2021-03-19 | 苏州精英环保有限公司 | Intelligent normal-temperature desorption remediation equipment and method for volatile organic contaminated soil |
| 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 |
-
2019
- 2019-12-10 CN CN201922201068.7U patent/CN211637715U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112517631A (en) * | 2020-11-27 | 2021-03-19 | 苏州精英环保有限公司 | Intelligent normal-temperature desorption remediation equipment and method for volatile organic contaminated soil |
| 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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