CN1586747A - Kerb treating process and device for volatile and semi-volatile organic substance polluted soil - Google Patents
Kerb treating process and device for volatile and semi-volatile organic substance polluted soil Download PDFInfo
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- CN1586747A CN1586747A CN 200410056888 CN200410056888A CN1586747A CN 1586747 A CN1586747 A CN 1586747A CN 200410056888 CN200410056888 CN 200410056888 CN 200410056888 A CN200410056888 A CN 200410056888A CN 1586747 A CN1586747 A CN 1586747A
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- 238000000034 method Methods 0.000 title claims abstract description 6
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- 239000003344 environmental pollutant Substances 0.000 claims abstract description 12
- 231100000719 pollutant Toxicity 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims description 33
- 239000005416 organic matter Substances 0.000 claims description 17
- 238000005516 engineering process Methods 0.000 claims description 9
- 238000010521 absorption reaction Methods 0.000 claims description 7
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- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
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- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
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Abstract
The outside treating process of polluted soil includes the following steps: excavating the polluted soil, filling the soil inside the treating apparatus, pumping with vacuum pump to form certain vacuum degree in the pumping well while intruding fresh air into soil to promote the volatilization of pollutant and taking out the volatile. The soil may be also heated to speed the volatilization. The treating apparatus consists of exhaust well with exhaust pipeline, temperature controlling sensor and heater embedded into soil pipe. The treated soil may be re-filled or used in other site.
Description
Technical field
The invention belongs to environmental protection technical field, particularly a kind of volatility and semi-volatile organic matter contaminated soil are administered technology and device outside the venue.
Background technology
Along with the development of petroleum industry, volatile organic matters such as gasoline, diesel oil (VOCs) and the pollution of semi-volatile organic matter (SVOCs) in soil environment are increasing.They are mainly from oil spill accident, as breaking of petroleum pipeline, and the seepage of storage tank, and the leakage problem of buried tank etc.In addition, along with the development of chemical engineering industry, various VOCs such as benzene, toluene and carbon tetrachloride also increase gradually to the pollution that soil causes, as arbitrarily toppling over of chemical industry discarded object and chemical agent, and the leakage in chemical plant, the accident in the chemical transport etc.These pollutants can produce many environmental problems: soil physico-chemical property is exerted an influence; Threaten the water quality safety of underground water source; Contaminated air; Owing to accumulating in building basement, the hydrocarbon gas causes explosion danger; Leak hydrocarbon compound and make under the public land that is in contact with it pipe network facilities accelerated ageing etc.Improvement outside the venue to VOCs and SVOCs contaminated soil is that contaminated soil is dug out at present, carries out subsequent treatment again, and employed method has landfill, burning, hydrodynamic cleaning and biological treatment.But all there is shortcoming separately in these methods: though landfill is handled simply, the expense costliness also may face after-treatment; Though it is good to burn treatment effect, the treatment facility complexity, the expense costliness also may produce secondary pollution; The hydrodynamic cleaning waste is serious, and treatment effect is undesirable, needs to handle flushing water; The biological treatment cycle is long, and treatment effect is undesirable, also may produce secondary pollution.Therefore, effective VOCs of exploiting economy and SVOCs contaminated soil improvement technology outside the venue become the problem that needs to be resolved hurrily.By retrieval, do not find relevant publication.
Summary of the invention
The object of the present invention is to provide a kind of volatility and semi-volatile organic matter contaminated soil to administer technology and device outside the venue.It is characterized in that: the described contaminated soil formation of controlling device outside the venue comprises the soil tube 13 that loads contaminated soil; The gas exhaust device is connected with vacuum meter 3 by wearing wall pipe 19 by the gas pump-drainage well 1 that is equipped with colored hole, and by pipeline 2 and pump drainage gas sampler 4, tail gas charcoal absorption removal device 5, flow control valve 7, gas flowmeter 6, flow control valve 7 and vavuum pump 8 are composed in series; Temperature control heating device is: is connected with relay 11 by temperature controller 10 by the temperature sensor 9 that inserts contaminated soil, heating tape 12 layerings are imbedded in the interior contaminated soil 14 of soil tube 13, and are connected with relay 11.
Described gas exhaust device is in gas pump-drainage well 1, and the gas pipeline 20 that the expanding cement 17 on its top is equipped with peastone 16 and ventilation with the bottom is fixed on central authorities, and its top connects cement gauge seal lid 18, and the connection suitable for reading of gas pipeline 20 is worn wall pipe 19 and constituted.
Described volatility and semi-volatile organic matter contaminated soil are administered technology outside the venue: at first, volatilized property and semi-volatile organic matter contaminated soil are dug out from the scene of polluting, layering then (every layer of about 2cm height) evenly is packed into treating apparatus, guarantee that bulk density everywhere is identical; Restart vavuum pump 8, slow turn-on flow rate control valve 7 makes the reading of gas flowmeter 6 reach the predetermined value of pump drainage gas flow, at this moment reads vacuum pressure value the gas pump-drainage well 1 from vacuum meter 3.When vavuum pump is worked, because ambient atmosphere pressure is higher than pressure in the pump-drainage well 1, fresh air constantly enters in the contaminated soil from atmosphere, formed towards the gas flowfield of pump-drainage well direction motion, promote the volatilization of the organic pollution that soil is adsorbed and bring its steam into gas pump-drainage well 1, be transported to tail gas charcoal absorption removal device 5 through gas pipeline 2 again and filter, give off the tail gas that meets atmospheric emission standard at last.From gas sampling device 4, gather the organic pollution steam, can weigh the degree of purification of contaminated soil and whether reach the design governance standard by measuring its concentration.At last, treated soil is backfilling into former pollued field or uses it for anything else.
As the volatility of pollutant a little less than, can use the temperature control heating system that contaminated soil is heated, improve the volatility of its pollutant.Connect heating power supply after starting vavuum pump, the 12 pairs of contaminated soils in heating tape are heated, by the temperature sensor 9 that is embedded in the contaminated soil signal is passed to temperature controller 10 simultaneously, the heating-up temperature of control contaminated soil: when temperature surpasses design temperature, temperature controller commands relays 11 disconnects heating power supply, stops the heating of ribbon heater to soil; When temperature drops to when being lower than design temperature, the temperature controller commands relays is closed heating power supply, heats to soil once more.In this way, this temperature control heating system can be controlled soil moisture maintenance and be substantially constant at the temperature that sets.
The invention has the beneficial effects as follows to make things convenient for fast, cost-effectively VOCs and SVOCs contaminated soil be administered outside the venue, can control the soil moisture and keep being substantially constant at the temperature that sets, improve the volatility of its pollutant.Treated soil can be backfilling into former pollued field or use it for anything else.
Description of drawings
Fig. 1 is apparatus of the present invention structural representation.
Fig. 2 is all structural representations of native barrel.
Fig. 3 is a gas pump-drainage well structural representation.
The specific embodiment
The invention provides a kind of volatility and the semi-volatile organic matter contaminated soil is administered technology and device outside the venue.This contaminated soil formation of controlling device outside the venue comprises the soil tube 13 that loads contaminated soil; The gas exhaust device is connected with vacuum meter 3 by wearing wall pipe 19 by the gas pump-drainage well 1 that is equipped with colored hole, and by pipeline 2 and pump drainage gas sampler 4, tail gas charcoal absorption removal device 5, flow control valve 7, gas flowmeter 6, flow control valve 7 and vavuum pump 8 are composed in series; Temperature control heating device is: is connected with relay 11 by temperature controller 10 by the temperature sensor 9 that inserts contaminated soil, heating tape 12 layerings are imbedded in the interior contaminated soil 14 of soil tube 13, and are connected with relay 11.
Its gas exhaust device is in gas pump-drainage well 1, and the gas pipeline 20 that the expanding cement 17 on its top is equipped with peastone 16 and ventilation with the bottom is fixed on central authorities, and its top connects cement gauge seal lid 18, and the connection suitable for reading of gas pipeline 20 is worn wall pipe 19 and constituted.
Described volatility and semi-volatile organic matter contaminated soil are administered technology outside the venue: at first, volatilized property and semi-volatile organic matter contaminated soil are dug out from the scene of polluting, layering then (every layer of about 2cm height) evenly is packed into treating apparatus, guarantee that bulk density everywhere is identical; Restart vavuum pump 8, slow turn-on flow rate control valve 7 makes the reading of gas flowmeter 6 reach the predetermined value of pump drainage gas flow, at this moment reads vacuum pressure value the gas pump-drainage well 1 from vacuum meter 3.When vavuum pump is worked, because ambient atmosphere pressure is higher than pressure in the pump-drainage well 1, fresh air constantly enters in the contaminated soil from atmosphere, formed towards the gas flowfield of pump-drainage well direction motion, promote the volatilization of the organic pollution that soil is adsorbed and bring its steam into gas pump-drainage well 1, be transported to tail gas charcoal absorption removal device 5 through gas pipeline 2 again and filter, give off the tail gas that meets atmospheric emission standard at last.From gas sampling device 4, gather the organic pollution steam, can weigh the degree of purification of contaminated soil and whether reach the design governance standard by measuring its concentration.At last, treated soil is backfilling into former pollued field or uses it for anything else.
As the volatility of pollutant a little less than, can use the temperature control heating system that contaminated soil is heated, improve the volatility of its pollutant.Connect heating power supply after starting vavuum pump, the 12 pairs of contaminated soils in heating tape are heated, by the temperature sensor 9 that is embedded in the contaminated soil signal is passed to temperature controller 10 simultaneously, the heating-up temperature of control contaminated soil: when temperature surpasses design temperature, temperature controller commands relays 11 disconnects heating power supply, stops the heating of ribbon heater to soil; When temperature drops to when being lower than design temperature, the temperature controller commands relays is closed heating power supply, heats to soil once more.In this way, this temperature control heating system can be controlled soil moisture maintenance and be substantially constant at the temperature that sets.
Lattice are radius 50cm * high 75cm, and the cover plate of a PVC is arranged on the soil tube 13, and available copper screw and valve rubber combine cover plate with the cylindrical shell sealing.Inside and outside one section of welding on the barrel at tube end 70cm place, all give prominence to 5cm external diameter Φ 20mm wear wall steel pipe 19, be convenient to connect gas pipeline 2.At soil tube 13 walls on week, from apart from the tube end 5cm to 50cm, whenever between the upper and lower every 5cm, between left and right every 10cm, the pore 15 of 10 row Φ 7mm is opened in diamond array, as shown in Figure 2, so that air evenly enters from contaminated soil top and side simultaneously, and weld 120 orders (aperture 0.125mm) steel gauze, prevent that contaminated soil from spilling from eyelet at the eyelet place.The total height of the contaminated soil of inserting in the soil tube 13 is 0.6m, and promptly the contaminated soil cumulative volume of Chu Liing is 0.471m
3, gross weight is 740kg.
Gas exhaust device: the gas pump-drainage well 1 (as Fig. 1, shown in Figure 3) of making a bite diameter 6mm in soil tube 13 centers; Gas pipeline 2: use the ABS plastic hard tube of external diameter Φ 20mm and the plastic flexible pipe of internal diameter Φ 20mm, the jockey each several part; Vacuum meter: range is-0.1MPa～0Pa; Pump drainage gas sampler: the screw and the supporting nut of a cover ABS plastic customized, screw is Φ 12mm * 45mm, the external diameter of nut is Φ 20mm, and is with flat.The through hole of vertically opening Φ 5mm at screw and nut, the special-purpose sample introduction sealed rubber of the gas-chromatography of Φ 10mm leveled up put into the nut bottom, again with screw precession nut to clamping valve rubber, then nut is coated the ABS plastic special glue, insertion is cemented in the vertical end interface of ABS plastic threeway of Φ 20mm, is sealably coupled to gas pipeline; Tail gas charcoal absorption removal device: the lucite post of an internal diameter Φ 60mm * high 30cm of customization processing is filled with granular activated carbon in the post; Gas flowmeter: model is LZB-15, and range is 0.4～4m3/h; Vavuum pump: 2XZ-4 type sliding vane rotary vacuum pump, the speed of exhaust are 41/s, and end vacuum is 6 * 10-2Pa.
Temperature control heating device
At stainless steel soil tube 13 outer walls, to highly twine last 5 heating tapes at interval for 60cm is even, totally 7 circles heat soil tube 13 interior soil from the bottom.In order to prevent that heat that the heating tape produces from being taken away by ambient air and dissipate, simultaneously also for the soil insulation in the soil tube 13, the high temperature resistant and heat insulation asbestic blanket of skin parcel two circles in the heating tape.In the soil of soil tube 13, bury two temperature sensors 9 underground, temperature sensor and temperature controller: model PT100, XMTD-3002, working range 0-99.9 ℃; Relay: model NC3 (CJ46)-09 A.C. contactor, nominal insulation voltage 690V, agreement heating current 16A; The heating tape: wherein the voltage of 4 heating tapes is 220V, and power is 640W, and specification is 50mm * 4000mm, and the power of another heating tape is 960W, and specification is 50mm * 6000mm.
The regulation effect of contaminated soil
Utilize the present invention, handle and contain pentane (C
5H
12) contaminated soil, the initial content of pollutant in soil is 1692mg/kg.Because C
5H
12Volatility is stronger, does not therefore use temperature control heating system heating contaminated soil, and promptly contaminated soil is normal temperature (25 ℃), and regulation effect is fine, sees Table 1.
Table 1 the present invention administers the effect of contaminated soil
Soil moisture processing time initial content is handled back content soil remediation standard soil removal efficiency
The pollutant volatility
(℃) (min) (ppm) (ppm) (ppm) (％)
C
5H
12Stronger by 25 660 1,692 3.1 50 99.8
C
8H
18More weak 50 660 247.4 8.7 50 96.5
Annotate: ppm is mg pollutant/kg soil; The relevant criterion that the soil remediation standard is formulated by EPA.
Claims (5)
1. volatility and semi-volatile organic matter contaminated soil controlling device outside the venue, it is characterized in that: the described contaminated soil formation of controlling device outside the venue comprises that soil tube (13), the gas exhaust device of the contaminated soil of filling are connected with vacuum meter (3) by wearing wall pipe (19) by the gas pump-drainage well (1) that is equipped with colored hole, and by pipeline (2) and pump drainage gas sampler (4), tail gas charcoal absorption removal device (5), flow control valve (7), gas flowmeter (6), flow control valve (7) and vavuum pump (8) are composed in series; Temperature control heating device is: be connected with relay (11) by temperature controller (10) by the temperature sensor (9) that inserts contaminated soil, heating tape (12) layering is imbedded in the interior contaminated soil (14) of soil tube (13), and is connected with relay (11).
2. according to the described volatility of claim 1 and semi-volatile organic matter contaminated soil controlling device outside the venue, it is characterized in that: described gas exhaust device is in gas pump-drainage well (1), the gas pipeline (20) that the expanding cement on its top (17) is equipped with peastone (16) and ventilation with the bottom is fixed on central authorities, its top connects cement gauge seal lid (18), and the connection suitable for reading of gas pipeline (20) is worn wall pipe (19) and constituted.
3. according to the described volatility of claim 1 and semi-volatile organic matter contaminated soil controlling device outside the venue, it is characterized in that: described contaminated soil layering evenly is packed into every floor height 1.5-3cm for the treatment of apparatus, requires to guarantee that bulk density everywhere is identical.
4. volatility and semi-volatile organic matter contaminated soil are administered method outside the venue, it is characterized in that: described volatility and semi-volatile organic matter contaminated soil are administered technology outside the venue and are: at first, volatilized property and semi-volatile organic matter contaminated soil are dug out from the scene of polluting, layering evenly is packed into treating apparatus then, guarantee that bulk density everywhere is identical; Restart vavuum pump (8), slow turn-on flow rate control valve (7), make the reading of gas flowmeter (6) reach the predetermined value of pump drainage gas flow, at this moment read vacuum pressure value the gas pump-drainage well (1) from vacuum meter (3), when vavuum pump is worked, because ambient atmosphere pressure is higher than the interior pressure of pump-drainage well (1), fresh air constantly enters in the contaminated soil from atmosphere, formed towards the gas flowfield of pump-drainage well direction motion, promote the volatilization of the organic pollution that soil is adsorbed and bring its steam into gas pump-drainage well (1), pass through gas pipeline (2) again and be transported to tail gas charcoal absorption removal device (5) filtration, give off the tail gas that meets atmospheric emission standard at last, from gas sampling device (4), gather the organic pollution steam, can weigh the degree of purification of contaminated soil and whether reach the design governance standard by measuring its concentration; At last, treated soil is backfilling into former pollued field or uses it for anything else.
5. administer method outside the venue according to claim 1 or 5 described volatility and semi-volatile organic matter contaminated soil, it is characterized in that: when the volatility of the pollutant of described volatilized property and semi-volatile organic matter contaminated soil is more weak, use temperature control heating device that contaminated soil is heated, improve the volatility of its pollutant, connect heating power supply after starting vavuum pump, heating tape (12) is heated contaminated soil, by the temperature sensor (9) that is embedded in the contaminated soil signal is passed to temperature controller (10) simultaneously, the heating-up temperature of control contaminated soil remains on 25-75 ℃ substantially constant temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410056888 CN1290632C (en) | 2004-08-30 | 2004-08-30 | Kerb treating process and device for volatile and semi-volatile organic substance polluted soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410056888 CN1290632C (en) | 2004-08-30 | 2004-08-30 | Kerb treating process and device for volatile and semi-volatile organic substance polluted soil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1586747A true CN1586747A (en) | 2005-03-02 |
| CN1290632C CN1290632C (en) | 2006-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410056888 Expired - Fee Related CN1290632C (en) | 2004-08-30 | 2004-08-30 | Kerb treating process and device for volatile and semi-volatile organic substance polluted soil |
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|---|---|
| CN (1) | CN1290632C (en) |
Cited By (30)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2010045883A1 (en) * | 2008-10-23 | 2010-04-29 | Chen Youzhi | Soil ventilating means and subterranean pollutant treatment system |
| CN101947543A (en) * | 2010-09-27 | 2011-01-19 | 中国科学院武汉岩土力学研究所 | Device for treating volatile organic polluted soil by utilizing clean tail gas of power plant |
| CN102069088A (en) * | 2010-11-23 | 2011-05-25 | 南京农业大学 | System for repairing organic contaminated soil by soil ventilation-vertical desorption furnace |
| CN102139277A (en) * | 2010-07-02 | 2011-08-03 | 北京建工环境修复有限责任公司 | Low-temperature deabsorption repairing process used for polluted soil |
| CN102350438A (en) * | 2011-07-15 | 2012-02-15 | 沈阳环境科学研究院 | System for continuous desorption and purification of VOCs in soil |
| CN102513343A (en) * | 2011-12-31 | 2012-06-27 | 北京鼎实环境工程有限公司 | Treatment system for repairing organics-contaminated soil |
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2004
- 2004-08-30 CN CN 200410056888 patent/CN1290632C/en not_active Expired - Fee Related
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| WO2010045883A1 (en) * | 2008-10-23 | 2010-04-29 | Chen Youzhi | Soil ventilating means and subterranean pollutant treatment system |
| CN102149485B (en) * | 2008-10-23 | 2013-11-13 | 陈有志 | Soil ventilating means and subterranean pollutant treatment system |
| CN102625734A (en) * | 2009-07-29 | 2012-08-01 | 泰拉热能公司 | Method and system for treating contaminated materials |
| CN102139277A (en) * | 2010-07-02 | 2011-08-03 | 北京建工环境修复有限责任公司 | Low-temperature deabsorption repairing process used for polluted soil |
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