CN104971819A - Polluted soil ex-situ desorption remediation system - Google Patents
Polluted soil ex-situ desorption remediation system Download PDFInfo
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- CN104971819A CN104971819A CN201510372030.XA CN201510372030A CN104971819A CN 104971819 A CN104971819 A CN 104971819A CN 201510372030 A CN201510372030 A CN 201510372030A CN 104971819 A CN104971819 A CN 104971819A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
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- Environmental & Geological Engineering (AREA)
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Abstract
The invention belongs to the field of environment protection equipment, and provides a polluted soil ex-situ desorption remediation system. The system comprises a soil grinder, an air blower, a fluidized bed, and a cyclone separator; electric energy, natural gas, or hot flue gas is taken as the heat source, polluted soil particles are subjected to a desorption treatment in the fluidized bed reactor; polluted soil particles are collided, rubbed, and turned-over under the action of fluidized air, the pollutants, which are coated by the soil, are exposed rapidly so as to fully contact the air, the pollutants are volatilized quickly, and furthermore, the temperature of the fluidized air can be adjusted according to the properties of the pollutants to further promote the volatilization and adsorption of pollutants. The provided system is suitable for the remediation of soil polluted by volatile/semi-volatile organic substances, can also be applied to remediation of soil polluted by heat-sensitive heavy metals such as Hg, As, and the like, has the advantages of quick adsorption speed and short remediation period, and is capable of generating good environmental benefits and social benefits.
Description
Technical field
The invention belongs to field of environment protection equipment, particularly relate to a kind of contaminated soil heterotopic solution adsorption desorption repair system.
Background technology
Along with the development of industrial or agricultural and the quickening of Development of China's Urbanization, the adjustment of the industrial structure and the quickening of urbanization process, large quantities of contaminating enterprises' successively resettlement or closedown relating to the industries such as chemical industry, metallurgy, oil, communications and transportation, light industry.The volatile contaminant existed in the soil in place is left in the resettlement of a lot of industrial enterprises, utilize in process in redevelopment, volatility in soil and half volatile pollutant can enter into other surrounding mediums by gas-soil circulation and water-soil circulation, also directly can enter human body by food chain or human breathing, harm humans is healthy.Volatility in soil and half volatile pollutant are listed in the toxic pollutant that potentially danger in environment is large, answer priority acccess control.Therefore, properly must dispose the soil by volatility and half volatile contaminants, to ensure the safety of biology and surrounding enviroment, avoid harm humans healthy.
At present, the recovery technique for the contaminated soil of volatility and half volatile pollutant mainly contains the mode such as gas phase extracting, normal temperature desorb.But gas phase extraction technique long operational time, cannot meet the demand that contaminated site circulates fast.Normal temperature desorption technique can process a large amount of contaminated soils comparatively rapidly, the desorb soil but bank up in the larger place of the normal temperature desorption technique of routine needs, and volatile contaminant directly evaporate in air from soil, secondary pollution can be caused to surrounding enviroment if dealt with improperly.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of contaminated soil heterotopic solution adsorption desorption repair system, to solve the problem that prior art needs larger place and easily causes secondary pollution.
The embodiment of the present invention is achieved in that a kind of contaminated soil heterotopic solution adsorption desorption repair system, and described system comprises: soil crusher 1, pressure fan 2, fluid bed 3 and cyclone separator 4;
Generate contaminated soil particle after described soil crusher 1 pair of contaminated soil carries out break process, input described fluid bed 3;
The air outlet of described pressure fan 2 is connected with the air inlet of heater 21, the air outlet of heater 21 is connected by the air inlet 33 of pipeline with described fluid bed 3, according to the character of the pollutant of described contaminated soil, regulated by the temperature of heater 21 pairs of fluidization airs, the fluidization air after heating enters described fluid bed 3 and starts contaminated soil particle described in fluidisation;
Described fluid bed 3 upper end also connects described cyclone separator 4, described contaminated soil particle is constantly taken out of to described cyclone separator 4 by described fluidization air while fluidisation, and clean soil particle is discharged from the pure land discharging opening 41 of described cyclone separator 4 lower end after described cyclone separator 4 is separated.
Further, the moisture content of the described contaminated soil of charging is not more than 20%;
The particle diameter that described soil crusher 1 processes the described contaminated soil particle of rear generation is less than 30mm.
Further, described contaminated soil particle is inputted described fluid bed 3 by feeding conveyer 11, soil warehouse 12 and constant feeder 13 by described soil crusher 1;
Described feeding conveyer 11 front end is arranged on the lower ending opening place of described soil crusher 1, and end is connected with described soil warehouse 12 top end opening;
The front end of described constant feeder 13 is arranged on described soil warehouse 12 lower ending opening place, end is connected with described fluid bed soil charging aperture 31, described constant feeder 13 measures it while the described contaminated soil particle of conveying, and by regulating belt speed to control to soil amount;
Described fluid bed soil charging aperture 31 is arranged on the outer wall of described fluid bed 3.
Further, the fluidization air temperature range that described heater 21 exports is normal temperature to 250 DEG C, and the thermal source of heater 21 be electric or natural gas or heat smoke.
Further, described fluid bed 3 interior lower end is air compartment 32, described fluid bed soil charging aperture 31 is arranged on air compartment upper end, and the sidewall of described air compartment 32 is provided with two symmetrical air inlets 33, and the air outlet of described pressure fan 2 is connected with two air inlets 33 respectively by pipeline; The top of described air compartment 32 is provided with gas distribution grid 34.
Further, the axis of described fluid bed 3 is provided with the soil discharge duct 35 running through described air compartment 32, the upper end open of described soil discharge duct 35 is connected with the through hole in the middle of described gas distribution grid 34, the ft connection of lower end and described fluid bed 3, contaminated soil particle described in the bulk that cannot be fluidized isolates reactor from described soil discharge duct 35, again enters described soil crusher 1 again broken.
Further, by regulating described fluidization air wind speed and soil inlet amount, regulate the time of staying of described contaminated soil particle in fluid bed 3 reactor;
Continuously-running duty or intermittent duty mode is taked to carry out solution adsorption desorption according to the pollution level of described contaminated soil:
For serious pollution soil, described system takes the mode of intermittent duty, described contaminated soil particle keeps fluidized state in described fluid bed 3 reactor, when pollutant is all from soil after desorb, strengthen described fluidization air gas speed again, make described soil particle change pneumatic convey state into from fluidized state, remove the clean soil particle after pollutant and brought into described cyclone separator 4 by described fluidization air;
For slight pollution soil, described system takes the mode run continuously, described contaminated soil particle keeps pneumatic convey state in described fluid bed 3 reactor, and described soil particle is constantly taken out of to described cyclone separator 4 by described fluidization air while fluidisation;
Described in described fluid bed 3, contaminated soil particle residence time scope is 2min ~ 60min.
Further, described system also comprises exhaust treatment system;
Described exhaust treatment system comprises sack cleaner 5, exhaust gas cleaner 6, air-introduced machine 7;
The outlet of described cyclone separator 4 is connected through the entrance of pipeline with described sack cleaner 5, dust discharging opening 51 is provided with bottom described sack cleaner 5, the outlet of described sack cleaner 5 is connected through the entrance of pipeline with described exhaust gas cleaner 6, and the outlet of described exhaust gas cleaner 6 is connected through the entrance of pipeline with air-introduced machine 7.
Further, described Operation system setting is can on the platform of movement.
The beneficial effect of a kind of contaminated soil heterotopic solution adsorption desorption repair system provided by the invention comprises:
1, the one that the embodiment of the present invention provides contaminates soil heterotopic solution adsorption desorption repair system, is applicable to the reparation of volatility half volatile organic polluted soil, is also applicable to the reparation of the thermal sensitivity heavy-metal contaminated soils such as Hg, As.When fluid bed carries out fluidisation to contaminated soil, contaminated soil constantly collides, rubs, seethes under the effect of fluidization air, originally wrapped pollutant exposes fast, fully contact with convected air, pollutant can be volatilized fast, thus Desorption separation is out from soil particle by pollutant; Heater is set, can regulates according to the temperature of the character of pollutant to fluidization air, thus further promote the volatilization of volatility and half volatile pollutant, by pollutant from soil particle Desorption separation out, desorption rate is fast, and repairing efficiency is short;
2, for the contaminated soil of different pollution level, the contaminated soil particle time of staying in a fluidized bed reactor can be regulated, take continuously-running duty or intermittent duty mode to carry out solution adsorption desorption, while ensureing the abundant desorb of contaminated soil, reduce the power consumption of fluid bed;
3, one dye soil heterotopic solution adsorption desorption repair system provided by the invention also comprises exhaust treatment system, is discharged in air again, avoids producing secondary pollution to environment after the tail gas containing volatility and half volatile pollutant is carried out dedusting, absorption, purification.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of contaminated soil heterotopic solution adsorption desorption repair system that the embodiment of the present invention provides;
Wherein, 1 is soil crusher, and 2 is pressure fan, and 3 is fluid bed, 4 is cyclone separator, and 5 is sack cleaner, and 6 is exhaust gas cleaner, 7 is air-introduced machine, and 11 is feeding conveyer, and 12 is soil storage, 13 is constant feeder, and 21 is heat exchanger, and 31 is fluid bed soil charging aperture, 32 is air compartment, and 33 is air inlet, and 34 is gas distribution grid, 35 is soil discharge duct, and 41 is pure land discharging opening, and 51 is dust discharging opening.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In order to technical solutions according to the invention are described, be described below by specific embodiment.
One dye soil heterotopic solution adsorption desorption repair system provided by the invention comprises soil crusher 1, pressure fan 2, fluid bed 3 and cyclone separator 4.
Contaminated soil particle is generated, input fluid bed 3 after soil crusher 1 pair of contaminated soil carries out break process.
The air outlet of pressure fan 2 is connected with the air inlet of heater 21, the air outlet of heater 21 is connected with the air inlet 33 of fluid bed 3 by pipeline, according to the character of the pollutant of contaminated soil, regulated by the temperature of heater 21 pairs of fluidization airs, fluidization air after heating enters fluid bed 3 and starts fluidisation contaminated soil particle, promotes the volatilization of volatility and half volatile pollutant.
Fluid bed 3 upper end also connects cyclone separator 4, and soil particle is constantly fluidized air and takes out of to cyclone separator 4 while fluidisation, and clean soil is discharged from the pure land discharging opening 41 of cyclone separator 4 lower end after cyclone separator 4 is separated.
The one dye soil heterotopic solution adsorption desorption repair system that the embodiment of the present invention provides, when fluid bed carries out fluidisation to contaminated soil, contaminated soil constantly collides, rubs, seethes under the effect of fluidization air, originally wrapped pollutant exposes fast, fully contact with convected air, pollutant can be volatilized fast, thus Desorption separation is out from soil particle by pollutant; Heater is set, can regulates according to the temperature of the character of pollutant to fluidization air, thus further promote the volatilization of volatility and half volatile pollutant, thus Desorption separation is out from soil particle by pollutant.
Embodiment one
Embodiment one provided by the invention is a kind of embodiment contaminating soil heterotopic solution adsorption desorption repair system provided by the invention, be illustrated in figure 1 the structural representation of the contaminated soil heterotopic solution adsorption desorption repair system that the embodiment of the present invention provides, as shown in Figure 1, in the embodiment of contaminated soil heterotopic solution adsorption desorption repair system provided by the invention:
The moisture content of the contaminated soil of charging is not more than 20%.
The particle diameter that soil crusher 1 processes the contaminated soil particle of rear generation is less than 30mm.
This contaminated soil particle is inputted fluid bed 3 by feeding conveyer 11, soil warehouse 12 and constant feeder 13 by soil crusher 1.
Feeding conveyer 11 front end is arranged on the lower ending opening place of soil crusher 1, and end is connected with soil warehouse 12 top end opening.The front end of constant feeder 13 is arranged on soil warehouse 12 lower ending opening place, end with fluid bed soil charging aperture 31 be connected, constant feeder 13 has weighing and controlling functions, can measure while conveying to soil, and by regulating belt speed to control to soil amount.
Fluid bed soil charging aperture 31 is arranged on the outer wall of fluid bed 3.
In embodiments of the present invention, the fluidization air temperature range that heater 21 exports is normal temperature to 250 DEG C, and the thermal source of heater 21 can be electric or natural gas or heat smoke.
In embodiments of the present invention, fluid bed 3 interior lower end is air compartment 32, and fluid bed soil charging aperture 31 is arranged on air compartment upper end, and the sidewall of air compartment 32 is provided with two symmetrical air inlets 33, and the air outlet of pressure fan 2 is connected with two air inlets 33 respectively by pipeline; The top of air compartment 32 is provided with gas distribution grid 34.
The axis of fluid bed 3 is provided with the soil discharge duct 35 running through air compartment 32, namely the upper end open of soil discharge duct 35 is connected with the through hole in the middle of gas distribution grid 34, the ft connection of lower end and fluid bed 3, the bulk contamination particle that cannot be fluidized can isolate reactor from this soil discharge duct 35, and it is again broken again to enter soil crusher 1.
By regulating fluidization air wind speed and soil inlet amount, the time of staying of contaminated soil particle in fluid bed 3 reactor can be regulated, continuously-running duty or intermittent duty mode is taked to carry out solution adsorption desorption according to the pollution level of contaminated soil, for serious pollution soil, need longer desorb desorption time, native system then takes the mode of intermittent duty, contaminated soil particle keeps fluidized state in fluid bed 3 reactor, when pollutant is all from soil after desorb, strengthen fluidization air gas speed again, soil particle is made to change pneumatic convey state into from fluidized state, remove the clean soil after pollutant to be fluidized air and to bring cyclone separator 4 into.For slight pollution soil, at short period and achievable desorption of contaminants desorption under the prerequisite fully contacted with air-flow, then native system takes the mode of operation continuously, contaminated soil particle keeps pneumatic convey state in fluid bed 3 reactor, and soil particle is constantly fluidized air and takes out of to cyclone separator 4 while fluidisation.
In fluid bed 3, contaminated soil particle residence time scope is 2min ~ 60min.
Further, the one dye soil heterotopic solution adsorption desorption repair system provided in the embodiment of the present invention also comprises exhaust treatment system, be discharged into again in air after tail gas containing volatility and half volatile pollutant is carried out dedusting, absorption, purification, avoid producing secondary pollution to environment.
This exhaust treatment system comprises sack cleaner 5, exhaust gas cleaner 6, air-introduced machine 7, the outlet of cyclone separator 4 is connected through the entrance of pipeline with sack cleaner 5, dust discharging opening 51 is provided with bottom sack cleaner 5, the outlet of sack cleaner 5 is connected through the entrance of pipeline with exhaust gas cleaner 6, and the outlet of exhaust gas cleaner 6 is connected through the entrance of pipeline with air-introduced machine 7.
Further, the contaminated soil heterotopic solution adsorption desorption repair system that the embodiment of the present invention provides can be arranged on moveable platform.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a contaminated soil heterotopic solution adsorption desorption repair system, is characterized in that, described system comprises: soil crusher (1), pressure fan (2), fluid bed (3) and cyclone separator (4);
Described soil crusher (1) obtains contaminated soil particle after carrying out break process to contaminated soil, inputs described fluid bed (3);
The air outlet of described pressure fan (2) is connected with the air inlet of heater (21), the air outlet of described heater (21) is connected with the air inlet (33) of described fluid bed (3) by pipeline, according to the character of the pollutant of described contaminated soil, regulated by described heater (21) temperature to fluidization air, the fluidization air after heating enters described fluid bed (3) and starts contaminated soil particle described in fluidisation;
Described fluid bed (3) upper end also connects described cyclone separator (4), described contaminated soil particle is constantly taken out of to described cyclone separator (4) by described fluidization air while fluidisation, and clean soil particle is discharged from the pure land discharging opening (41) of described cyclone separator (4) lower end after described cyclone separator (4) is separated.
2. contaminated soil heterotopic solution adsorption desorption repair system as claimed in claim 1, it is characterized in that, the moisture content of the described contaminated soil of charging is not more than 20%;
The particle diameter of the described contaminated soil particle generated after described soil crusher (1) process is less than 30mm.
3. contaminated soil heterotopic solution adsorption desorption repair system as claimed in claim 1, it is characterized in that, described contaminated soil particle is inputted described fluid bed (3) by feeding conveyer (11), soil warehouse (12) and constant feeder (13) by described soil crusher (1);
Described feeding conveyer (11) front end is arranged on the lower ending opening place of described soil crusher (1), and end is connected with described soil warehouse (12) top end opening;
The front end of described constant feeder (13) is arranged on described soil warehouse (12) lower ending opening place, end is connected with described fluid bed soil charging aperture (31), described constant feeder (13) measures it while the described contaminated soil particle of conveying, and by regulating belt speed to control to soil amount;
Described fluid bed soil charging aperture (31) is arranged on the outer wall of described fluid bed (3).
4. contaminated soil heterotopic solution adsorption desorption repair system as claimed in claim 1, it is characterized in that, the fluidization air temperature range that described heater (21) exports is normal temperature to 250 DEG C, and the thermal source of heater (21) is electricity or natural gas or heat smoke.
5. contaminated soil heterotopic solution adsorption desorption repair system as claimed in claim 1, it is characterized in that, described fluid bed (3) interior lower end is air compartment (32), described fluid bed soil charging aperture (31) is arranged on air compartment upper end, the sidewall of described air compartment (32) is provided with two symmetrical air inlets (33), and the air outlet of described heater (21) is connected with two air inlets (33) respectively by pipeline; The top of described air compartment (32) is provided with gas distribution grid (34).
6. contaminated soil heterotopic solution adsorption desorption repair system as claimed in claim 5, it is characterized in that, the axis of described fluid bed (3) is provided with the soil discharge duct (35) running through described air compartment (32), the upper end open of described soil discharge duct (35) is connected with the through hole in the middle of described gas distribution grid (34), the ft connection of lower end and described fluid bed (3), contaminated soil particle described in the bulk that cannot be fluidized isolates reactor from described soil discharge duct (35), again enter described soil crusher (1) again broken.
7. contaminated soil heterotopic solution adsorption desorption repair system as claimed in claim 1, is characterized in that, by regulating described fluidization air wind speed and soil inlet amount, regulating the time of staying of described contaminated soil particle in fluid bed (3) reactor;
Continuously-running duty or intermittent duty mode is taked to carry out solution adsorption desorption according to the pollution level of described contaminated soil:
For serious pollution soil, described system takes the mode of intermittent duty, described contaminated soil particle keeps fluidized state in described fluid bed (3) reactor, when pollutant is all from soil after desorb, strengthen described fluidization air gas speed again, make described soil particle change pneumatic convey state into from fluidized state, remove the clean soil particle after pollutant and brought into described cyclone separator (4) by described fluidization air;
For slight pollution soil, described system takes the mode run continuously, described contaminated soil particle keeps pneumatic convey state in described fluid bed (3) reactor, and described soil particle is constantly taken out of to described cyclone separator (4) by described fluidization air while fluidisation;
Described in described fluid bed (3), contaminated soil particle residence time scope is 2min ~ 60min.
8. contaminated soil heterotopic solution adsorption desorption repair system as claimed in claim 1, it is characterized in that, described system also comprises exhaust treatment system;
Described exhaust treatment system comprises sack cleaner (5), exhaust gas cleaner (6) and air-introduced machine (7);
The outlet of described cyclone separator (4) is connected through the entrance of pipeline with described sack cleaner (5), described sack cleaner (5) bottom is provided with dust discharging opening (51), the outlet of described sack cleaner (5) is connected through the entrance of pipeline with described exhaust gas cleaner (6), and the outlet of described exhaust gas cleaner (6) is connected through the entrance of pipeline with air-introduced machine (7).
9. contaminated soil heterotopic solution adsorption desorption repair system as claimed in claim 1, is characterized in that, described Operation system setting is can on the platform of movement.
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| CN201510372030.XA CN104971819A (en) | 2015-06-30 | 2015-06-30 | Polluted soil ex-situ desorption remediation system |
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| CN201510372030.XA CN104971819A (en) | 2015-06-30 | 2015-06-30 | Polluted soil ex-situ desorption remediation system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106862259A (en) * | 2017-04-01 | 2017-06-20 | 安徽蓝鼎环保能源科技有限公司 | A kind of soil remediation equipment |
| CN107552558A (en) * | 2017-10-12 | 2018-01-09 | 李林 | A kind of soil remediation contaminated soil stabilizing treatment apparatus |
| CN108672489A (en) * | 2018-06-08 | 2018-10-19 | 南京林业大学 | A kind of carbonization restorative procedure of volatile organic matter-heavy-metal composite pollution soil |
| CN109848198A (en) * | 2019-04-01 | 2019-06-07 | 南京师范大学 | A kind of soil thermal desorption ex-situ repair system |
| CN111659720A (en) * | 2020-06-29 | 2020-09-15 | 广东佳德环保科技有限公司 | System device and method for soil regeneration treatment |
| CN112355045A (en) * | 2020-11-17 | 2021-02-12 | 浙江大学 | Fluidized bed type DBD plasma organic matter contaminated soil remediation system and process |
| US10981204B2 (en) | 2018-05-23 | 2021-04-20 | Kunming University Of Science And Technology | Method and system for thermal desorption treatment of organic-contaminated soil and treatment of desorbed waste gas |
| CN114522972A (en) * | 2022-03-08 | 2022-05-24 | 广东工业大学 | Soil thermal desorption fluidized bed adjusting system and adjusting method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112355045A (en) * | 2020-11-17 | 2021-02-12 | 浙江大学 | Fluidized bed type DBD plasma organic matter contaminated soil remediation system and process |
| CN114522972A (en) * | 2022-03-08 | 2022-05-24 | 广东工业大学 | Soil thermal desorption fluidized bed adjusting system and adjusting method |
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