CN106670223A - Two-phase ozone-ultraviolet light catalytic remediation method for organic polluted soil - Google Patents

Two-phase ozone-ultraviolet light catalytic remediation method for organic polluted soil Download PDF

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Publication number
CN106670223A
CN106670223A CN201611218470.0A CN201611218470A CN106670223A CN 106670223 A CN106670223 A CN 106670223A CN 201611218470 A CN201611218470 A CN 201611218470A CN 106670223 A CN106670223 A CN 106670223A
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China
Prior art keywords
ozone
gas
soil
component
water
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CN201611218470.0A
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Chinese (zh)
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CN106670223B (en
Inventor
沈婷婷
陈展
吴育林
郑超
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Shanghai Survey Design And Research Institute Group Co ltd
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Shanghai Geotechnical Investigations and Design Institute Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09CRECLAMATION OF CONTAMINATED SOIL
    • B09C1/00Reclamation of contaminated soil
    • B09C1/08Reclamation of contaminated soil chemically

Abstract

The invention discloses a two-phase ozone-ultraviolet light catalytic remediation method for organic polluted soil. The two-phase ozone-ultraviolet light catalytic remediation method for the organic polluted soil comprises the following steps that a soil remediation room is filled with the soil to be remediated, and a ventilating assembly is buried in the soil; ozone water is sprayed into the soil through an ozone water spraying head, and the soil is irradiated through ultraviolet lamps; ozone water in the soil is extracted through a water-gas recovery assembly; ozone gas is injected into the soil through the ventilating assembly; and gas in the soil is extracted through the water-gas recovery assembly. The two-phase ozone-ultraviolet light catalytic remediation method for the organic polluted soil has the advantages that the polluted soil is treated through the ozone water, ultraviolet light and the ozone gas, and thus pollutants in the soil can be effectively removed; and the gas-water recovery assembly is used for recovering sewage and gas so that the recovered ozone gas can be used repeatedly, and gas emission is reduced.

Description

For the biphase ozone-ultraviolet photocatalysis restorative procedure of organic contamination soil
Technical field
The invention belongs to field of environment protection, and in particular to a kind of biphase ozone-ultraviolet light for organic contamination soil is urged Change restorative procedure.
Background technology
The development of modern industry in recent years greatly advances the process of human civilization, and people are enjoying industrial civilization creation Plentiful and substantial fruit while, also suffered from thing followed environmental pollution damage.What various pollutant such as landfill yard was produced oozes The discharge of garbage, the mining area place waste liquid for producing and the chemical fertilizer for ploughing bad administration that filtrate, industrial sites are produced is caused Serious pollution, the survival and development to the mankind constitute threat.The Organic Pollution of the wherein soil body and water body it is especially prominent and Seriously, these pollutant enter human body by moving about and converting by respiratory tract, digestive tract etc., and to human body pole is caused Big threat, many organic pollutions all have chemical carcinogenesis and light Toxic efficiency, but lack in prior art effective Contaminated soil remediation means.
The content of the invention
The purpose of the present invention is according to above-mentioned the deficiencies in the prior art part, there is provided a kind of for the biphase of organic contamination soil Ozone-ultraviolet photocatalysis restorative procedure, the method is by using the technological means such as Ozone Water and ultraviolet catalytic, realizing to dirt Effective reparation of dye soil.
The object of the invention is realized being completed by technical scheme below:
A kind of biphase ozone-ultraviolet photocatalysis restorative procedure for organic contamination soil, it is characterised in that comprise the following steps:To Soil to be repaired is loaded in soil remediation room, and ventilation component is buried in soil;Using ozone sprinkler head to the soil Spray Ozone Water, and the soil is irradiated using Burdick lamp;The ozone in component extraction soil is reclaimed using aqueous vapor Water;Using ventilation component to injection of ozone gas in the soil;The gas in component extraction soil is reclaimed using the aqueous vapor.
The ventilation component includes that some parallel connections are embedded in the breather of the soil inside to be repaired differing heights;Institute State and offer on the tube wall of breather passage or raphe transection;The breather connects the aqueous vapor recovery group by stop valve Part;During to soil spray Ozone Water, reclaim component using aqueous vapor the soil is entered by the breather Row suction.
The aqueous vapor reclaims component includes vacuum pump, gas-liquid separator, gas cleaning plant and sewage treatment facility;Institute State sewage and gas that vacuum pump is extracted in the soil remediation room by the ventilation component;The dirt that the vacuum pump will be extracted Water and gas are delivered to the gas-liquid separator;The gas-liquid separator sets the sewage transport isolated to the sewage disposal Apply, the gas isolated is delivered to the gas cleaning plant by the gas-liquid separator, and the gas cleaning plant is to described Gas carries out purified treatment, and purified gas is delivered to into ozone formation component.
The gas cleaning plant includes alkali purge chamber, sour purge chamber and the activated carbon adsorption room being sequentially connected in series;It is described During gas cleaning plant carries out purified treatment to the gas, the gas flows successively through alkali purge chamber, sour purge chamber And activated carbon adsorption room.
The entrance of the ventilation component is connected with ozone formation component;The ozone formation component includes ozonator; The air inlet connection oxygen cylinder of the ozonator and the aqueous vapor reclaim component, and convert oxygen into ozone;It is described The gas outlet of ozonator connects the entrance of the ventilation component by ozone stable room and supercharging equipment.
The ozone sprinkler head is connected with Ozone Water formation component;The Ozone Water formation component include airtight water tank, with And the micro-nano bubble generator being arranged in the airtight water tank;The air inlet of the airtight water tank connects the ozone to be occurred The gas outlet of device;The gas outlet of the ozonic water tank connects the ozone sprinkler head.
It is an advantage of the invention that processed contaminated soil using Ozone Water, ultraviolet and ozone gas, can be with Effectively remove the pollutant inside soil;Component is reclaimed using aqueous vapor to reclaim sewage and gas, can reuse The ozone of recovery, reduces the discharge of gas.
Description of the drawings
Fig. 1 is the schematic diagram of the biphase ozone-ultraviolet photocatalysis repair system that the present invention is used.
Specific embodiment
Below in conjunction with accompanying drawing the feature and other correlated characteristics of the present invention are described in further detail by embodiment, with It is easy to the understanding of technical staff of the same trade:
Such as Fig. 1, labelling 1-32a is respectively in figure:Soil remediation room 1, ozone formation component 2, Ozone Water formation component 3, aqueous vapor Reclaim component 4, Burdick lamp 5, ozone sprinkler head 6, ventilation component 7, soil 8, heap body basis 9, breather 10, oxygen cylinder 11, Ozonator 12, ozone stable room 13, supercharging equipment 14, first gas memorizer 15, second gas memorizer 16, closed water Case 17, micro-nano bubble generator 18, vacuum pump 19, gas-liquid separator 20, sewage treatment facility 21, gas cleaning plant 22, Alkali purge chamber 22-1, acid purge chamber 22-2, activated carbon adsorption room 22-3, third gas memorizer 23, exhaust outlet 24, ozone concentration Detector 25a, ozone concentration detector 25b, barometer 26a, gas control valve 27a, gas control valve 27b, gas control valve 27c, exsiccator 28, gas flowmeter 29a, stop valve 30a, stop valve 30b, stop valve 30c, stop valve 30d, fluid flowmeter 31a, barometer 32a.
Embodiment:As shown in figure 1, the present embodiment is specifically related to a kind of biphase ozone-ultraviolet light for organic contamination soil Catalysis restorative procedure, the method is repaired to soil using the biphase ozone-ultraviolet photocatalysis repair system shown in Fig. 1, repaiied Compound recipe method specifically includes following steps:
1)Soil 8 to be repaired is loaded into soil remediation room 1, and ventilation component 7 is buried in the soil 8;Pending dirt Dye soil 8 need to be first passed through and make its granule reach below 20mm after crushing and screening, and moisture control is 25% or so.
As shown in figure 1, in the present embodiment, soil remediation room 1 is silica gel material, the four fluorine tube corroded by resistance to oxidation, or Closed booth made by material of the person with ORC;It is provided with for preloading earth backing to be repaired in the bottom of soil remediation room 1 The heap body basis 9 of earth 8;Heap body basis 9 is the hard concrete floor after cure process, and HDPE film and soil after overlying 2.0mm Work cloth(400g/㎡)Carry out Anti-seeping technology.Ozone concentration detector 25a and barometer are additionally provided with inside soil remediation room 1 26a。
As shown in figure 1, inside soil remediation room 1, the pending layering of soil 8 is deposited in the surface on heap body basis 9;Soil In 0.4m to 0.6m, altogether height is less than 1.2m to heap body to 8 every layer pile height, it is ensured that the good aeration of soil heap body and ooze Permeability, buries ventilation component 7 inside soil 8;Ventilation component 7 is embedded in inside soil to be repaired 8 not including some parallel connections Level breather 10;Passage or raphe transection are offered on the middle part tube wall of breather 10.The entrance connection of ventilation component 7 Ozone formation component 2, ozone formation component 2 is by ventilation component 7 to soil inside injection of ozone gas to be repaired;Ventilation group The outlet connection aqueous vapor of part 7 reclaims component 4, aqueous vapor reclaim component 4 by ventilation component 7 aspirate the sewage of soil remediation room 1 with And gas.
As shown in figure 1, in the present embodiment, a diameter of 50mm to 60mm of breather 10, middle part is diameter 2.5mm Passage or raphe transection, imbed heap body each layer breather 10 be one supervisor and many coupled arms, supervisor Along heap body length direction, arm is along heap body width.
As shown in figure 1, being provided with ozone sprinkler head 6 and Burdick lamp 5 in soil remediation room 1, ozone sprinkler head 6 connects Ozone Water formation component 3, for the sprinkling Ozone Water of soil to be repaired 8 in soil remediation room 1;Burdick lamp 5 is used for soil Earth 8 carries out irradiation, and Ozone Water produces next time the stronger OH of oxidability in ultraviolet irradiation, so as to pollutant oxidation be gone Remove.Burdick lamp 5 is that ultraviolet ray transmissivity is high, few quartz uv lamp of decaying, and wave-length coverage is 250 ~ 270nm.
2)Ozone Water is sprayed to the soil 8 using ozone sprinkler head 6, and soil 8 is shone using Burdick lamp 5 Penetrate;Ozone Water produces the Ozone Water containing strong oxidizing property OH under ultraviolet irradiation, into inside soil 8;The OH of strong oxidizing property The Ozone Water pollutant accelerated oxidation that can cause in soil 8.
As shown in figure 1, ozone formation component 2 be used for prepare ozone gas, it include oxygen cylinder 11, ozonator 12, Ozone stable room 13 and supercharging equipment 14;The entrance of the connection first gas of oxygen cylinder 11 memorizer 15;First gas memorizer 15 entrance is also connected with aqueous vapor and reclaims component 4;The outlet connection ozonator 12 of first gas memorizer 15;Ozonator The entrance of 12 outlet second gas memorizer 16;The outlet Ozone Water formation component 3 of second gas memorizer 16 And the entrance of ventilation component 7;Gas regulation is in series between the outlet of second gas memorizer 16 and the entrance of ventilation component 7 Valve 27a, ozone stable room 13 and supercharging equipment 14.
As shown in figure 1, be in series between the entrance of oxygen cylinder 11 and first gas memorizer 15 gas control valve 27b and Exsiccator 28;The inside of exsiccator 28 adopts the solid particle desiccant such as anhydrous silica gel or anhydrous calcium chloride.Supercharging equipment 14 and logical Ozone concentration detector 25b, gas flowmeter 29a and stop valve 30a are in series between the entrance of pneumatic module 7.
As shown in figure 1, ozonator 12 is intermediate-frequency ozone generator, the g/h -100g/h of ozone yield 50, specifically According to Charge-Air Oxygen content, concentration of ozone and time of origin can be adjusted.Supercharging equipment 14 is high-quality centrifugal air compressor etc., To can be passed through in reparation booth after ozone classification pressurization.Ozone stable room 13 is the sulfuric acid solution comprising 1% ~ 2% concentration, is used for Reduce the decomposition of ozone.
As shown in figure 1, Ozone Water formation component 3 is used to for ozone gas to make Ozone Water, it includes airtight water tank 17, close Water tank 17 is closed built with surfactant solution, surfactant solution can be in order to the pollutant in soil to be repaired be soaked Go out;Airtight water tank 17 is internally provided with micro-nano bubble generator 18;Micro-nano bubble generator 18 can produce nanoscale gas Bubble so that the time of staying of the ozone in water increases several weeks.
As shown in figure 1, airtight water tank 17 is provided with water inlet, air inlet and outlet;Air inlet passes through gas regulation Valve 27c connection ozone formation component 2;Outlet connects soil remediation room 1 by stop valve 30b and fluid flowmeter 31a Ozone sprinkler head 6.Airtight water tank 17 is the corrosion-resistant water tank with transparent graduated window.
During spray Ozone Water, the min to 15min of ozone Water spray 10, topsoil occur after open fire with certainly Order layering under above is opened breather 10 and soil is aspirated, to accelerate diffusion velocity of the Ozone Water in soil 8; If soil 8 is divided into dried layer according to the thickness of 0.4m to 0.6m;One layer of breather 10 is provided between adjacent two layers soil 8, is ventilated Pipe 10 is connected with stop valve 30c;During ozone Water spray, the stop valve 30c, stop valve 30c of breather 10 is successively opened The vacuum pump 19 for reclaiming component 4 using aqueous vapor after opening is aspirated to soil, to accelerate diffusion of the Ozone Water in soil 8 Speed;After current occurs in the breather 10 in open mode, the stop valve 30c of the breather 10 is closed, and opened under it The stop valve 30c of the breather 10 of side, is aspirated using vacuum pump 19;After soil 8 is by Ozone Water complete wetting, close complete The stop valve 30c and vacuum pump 19 in portion, so that Ozone Water is fully reacted with soil 8.
3)The Ozone Water in the extraction soil 8 of component 4 is reclaimed using aqueous vapor;
As shown in figure 1, aqueous vapor reclaims component 4 includes vacuum pump 19, gas-liquid separator 20, sewage treatment facility 21, gas purification Device 22 and third gas memorizer 23;Gas-liquid separator 20 connects the outlet of ventilation component 7 by vacuum pump 19;Gas-liquid point Liquid outlet from device 20 connects sewage treatment facility 21;The air vent of gas-liquid separator 20 pass sequentially through gas cleaning plant 22 with And the connection ozone of third gas memorizer 23 formation component 2.
Gas cleaning plant 22 includes alkali purge chamber 22-1, acid purge chamber 22-2 and the activated carbon adsorption room being sequentially connected in series 22-3;Soil remediation room 1 is additionally provided with exhaust outlet 24, and exhaust outlet 24 connects the air inlet of gas cleaning plant 22.Aqueous vapor is reclaimed Component 4 can reclaim the ozone gas inside soil remediation room 1, and the gas of recovery is delivered to inside ozone formation component 2, To recycle.
The product that aqueous vapor recovery component 4 is extracted in above-mentioned steps is the mixture of sewage and gas;Using gas-liquid separation Device 20 is separated to said mixture, and the sewage transport isolated to sewage treatment facility 21, the gas isolated is delivered to Gas cleaning plant 22;During gas cleaning plant 22 is processed, gas flows successively through alkali purge chamber 22-1, acid cleaning Room 22-2 and activated carbon adsorption room 22-3, removes successively in the process the various magazines in gas;Gas after process leads to Cross third gas memorizer 23 and be delivered to ozone formation component;By reclaiming to gas, the utilization rate of ozone can be improved, The discharge of tail gas is reduced simultaneously.
4)Using ventilation component 7 to injection of ozone gas in soil 8;In injection process, supercharging equipment 14 and phase are opened Valve is answered, is adjusted to inlet gas ozone concentration and is reached design requirement, ventilation adjusts the stop valve of each layer breather 10 after a period of time 30d makes its barometer 32a readings consistent;Air pressure reaches the front end stop valve 30d that breather 10 is closed after 0.01 ~ 0.02Mpa, stops Only a period of time, after each barometer reading reduce it is larger after be again turned on supercharging equipment 14 and air inlet stop valve 30d carry out it is above-mentioned Operation, and the reading of the ozone concentration detector 25a in Real Time Observation soil remediation room and barometer 26a, treat the two have compared with Stop injection of ozone gas after big increase.
5)The gas in the extraction soil 8 of component 4 is reclaimed using aqueous vapor.
The above-mentioned step 2 of repetition)To step 5)Level of pollution in aqueous vapor reclaims sewage and gas that component is reclaimed Less than aimed concn;After the completion of pollution purification, the ozone gas in soil remediation room 1 are delivered to by steam by exhaust outlet 24 Reclaim component;After the completion of ozone discharge, soil remediation room 1 is opened, the soil of its inside is detected and disposed;
The Advantageous Effects of the present embodiment are:Using Ozone Water, ultraviolet and ozone gas to contaminated soil at Reason, can effectively remove the pollutant inside soil;Component is reclaimed using aqueous vapor to reclaim sewage and gas, Ke Yichong The multiple ozone using recovery, reduces the discharge of gas.

Claims (6)

1. it is a kind of for organic contamination soil biphase ozone-ultraviolet photocatalysis restorative procedure, it is characterised in that comprise the following steps: Soil to be repaired is loaded into soil remediation room, and ventilation component is buried in soil;Using ozone sprinkler head to the soil Earth sprays Ozone Water, and the soil is irradiated using Burdick lamp;Reclaim smelly in component extraction soil using aqueous vapor Oxygen water;Using ventilation component to injection of ozone gas in the soil;The gas in component extraction soil is reclaimed using the aqueous vapor Body.
2. a kind of biphase ozone-ultraviolet photocatalysis restorative procedure for organic contamination soil according to claim 1, it is special Levy and be:The ventilation component includes that some parallel connections are embedded in the breather of the soil inside to be repaired differing heights;Institute State and offer on the tube wall of breather passage or raphe transection;The breather connects the aqueous vapor recovery group by stop valve Part;During to soil spray Ozone Water, reclaim component using aqueous vapor the soil is entered by the breather Row suction.
3. a kind of biphase ozone-ultraviolet photocatalysis restorative procedure for organic contamination soil according to claim 1, it is special Levy and be:The aqueous vapor reclaims component includes vacuum pump, gas-liquid separator, gas cleaning plant and sewage treatment facility;Institute State sewage and gas that vacuum pump is extracted in the soil remediation room by the ventilation component;The dirt that the vacuum pump will be extracted Water and gas are delivered to the gas-liquid separator;The gas-liquid separator sets the sewage transport isolated to the sewage disposal Apply, the gas isolated is delivered to the gas cleaning plant by the gas-liquid separator, and the gas cleaning plant is to described Gas carries out purified treatment, and purified gas is delivered to into ozone formation component.
4. a kind of biphase ozone-ultraviolet photocatalysis restorative procedure for organic contamination soil according to claim 3, it is special Levy and be:The gas cleaning plant includes alkali purge chamber, sour purge chamber and the activated carbon adsorption room being sequentially connected in series;The gas During body purifier carries out purified treatment to the gas, the gas flow successively through alkali purge chamber, sour purge chamber with And activated carbon adsorption room.
5. a kind of biphase ozone-ultraviolet photocatalysis restorative procedure for organic contamination soil according to claim 1, it is special Levy and be:The entrance of the ventilation component is connected with ozone formation component;The ozone formation component includes ozonator;Institute The air inlet connection oxygen cylinder and the aqueous vapor for stating ozonator reclaims component, and converts oxygen into ozone;It is described smelly The gas outlet of Oxygen Generator connects the entrance of the ventilation component by ozone stable room and supercharging equipment.
6. a kind of biphase ozone-ultraviolet photocatalysis restorative procedure for organic contamination soil according to claim 1, it is special Levy and be:The ozone sprinkler head is connected with Ozone Water formation component;The Ozone Water formation component include airtight water tank and The micro-nano bubble generator being arranged in the airtight water tank;The air inlet of the airtight water tank connects the ozonator Gas outlet;The gas outlet of the ozonic water tank connects the ozone sprinkler head.
CN201611218470.0A 2016-12-26 2016-12-26 Two-phase ozone-ultraviolet light catalysis repairing method for organic polluted soil Active CN106670223B (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05154217A (en) * 1991-05-09 1993-06-22 Ultra Syst Gmbh Uv Oxidation Method nd device to cleanse contaminated solid object
US5259962A (en) * 1991-05-30 1993-11-09 Later Roger C Method and apparatus for decontamination of soils and other particulate materials
CN102941223A (en) * 2012-11-25 2013-02-27 西安费斯达自动化工程有限公司 Ultraviolet ozone processing method for residual pesticide in rice field soil
CN103752598A (en) * 2013-12-25 2014-04-30 天津生态城环保有限公司 Equipment and method for restoring heavy-metal-polluted soil by combination of leaching method and oxidation method
CN203678832U (en) * 2013-12-25 2014-07-02 天津生态城环保有限公司 Equipment for repairing heavy-metal-polluted soil by leaching in combination with oxidation method
CN103920703A (en) * 2014-04-04 2014-07-16 济南润土农业科技有限公司 Advanced redox in-situ treatment system and method for restoring polluted soil
CN204429842U (en) * 2015-01-28 2015-07-01 南通国盛环境修复有限责任公司 A kind of device of high-efficiency photocatalysis oxidization process organic polluted soil
CN205413902U (en) * 2015-09-29 2016-08-03 中国科学院城市环境研究所 Organic pollutants soil normal position drip washing repair equipment

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05154217A (en) * 1991-05-09 1993-06-22 Ultra Syst Gmbh Uv Oxidation Method nd device to cleanse contaminated solid object
US5259962A (en) * 1991-05-30 1993-11-09 Later Roger C Method and apparatus for decontamination of soils and other particulate materials
CN102941223A (en) * 2012-11-25 2013-02-27 西安费斯达自动化工程有限公司 Ultraviolet ozone processing method for residual pesticide in rice field soil
CN103752598A (en) * 2013-12-25 2014-04-30 天津生态城环保有限公司 Equipment and method for restoring heavy-metal-polluted soil by combination of leaching method and oxidation method
CN203678832U (en) * 2013-12-25 2014-07-02 天津生态城环保有限公司 Equipment for repairing heavy-metal-polluted soil by leaching in combination with oxidation method
CN103920703A (en) * 2014-04-04 2014-07-16 济南润土农业科技有限公司 Advanced redox in-situ treatment system and method for restoring polluted soil
CN204429842U (en) * 2015-01-28 2015-07-01 南通国盛环境修复有限责任公司 A kind of device of high-efficiency photocatalysis oxidization process organic polluted soil
CN205413902U (en) * 2015-09-29 2016-08-03 中国科学院城市环境研究所 Organic pollutants soil normal position drip washing repair equipment

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