CN102367187B - Chlorinated hydrocarbon-polluted underground water blowing oxidation and tail gas treatment process - Google Patents
Chlorinated hydrocarbon-polluted underground water blowing oxidation and tail gas treatment process Download PDFInfo
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- CN102367187B CN102367187B CN 201110108336 CN201110108336A CN102367187B CN 102367187 B CN102367187 B CN 102367187B CN 201110108336 CN201110108336 CN 201110108336 CN 201110108336 A CN201110108336 A CN 201110108336A CN 102367187 B CN102367187 B CN 102367187B
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Abstract
The invention relates to a chlorinated hydrocarbon-polluted underground water blowing oxidation and tail gas treatment process. The chlorinated hydrocarbon-polluted underground water blowing oxidation and tail gas treatment process comprises the following steps of extracting underground water, blowing off volatile chlorinated aliphatic hydrocarbons in water and carrying out ozone decoloration of chromogenic organic matters by an air blowing method, condensing a part of moisture of the high-chlorinated hydrocarbon content tail gas obtained by blowing, then carrying out vapor-phase catalytic combustion of the high-chlorinated hydrocarbon content tail gas obtained by blowing, and carrying out chemical neutralization absorption of hydrogen chloride produced in the high-chlorinated hydrocarbon content tail gas subjected to the vapor-phase catalytic combustion. The chlorinated hydrocarbon-polluted underground water blowing oxidation and tail gas treatment process adopts the devices of a multifunctional refluent blowing oxidation complex tower, a tube-type heat exchanger, a volatile chlorinated hydrocarbon catalytic combustion device and a hydrogen chloride tail gas neutralization absorption tower, wherein the devices are installed orderly and are connected by pipes. The chlorinated hydrocarbon-polluted underground water blowing oxidation and tail gas treatment process has the advantages that a system structure has a reasonable design and a compact form and is convenient for operation; a range of treated objects is wide; efficiency is high; effects are thorough; blowing efficiency is high; combustion is complete; operation unit combination is optimized; tower devices are connected by flanges so that dismounting and transportation are convenient; and the chlorinated hydrocarbon-polluted underground water blowing oxidation and tail gas treatment process can be utilized for restoration and treatment on different types of polluted places and thus having wide application prospects.
Description
[technical field]
The present invention relates to hydrochloric ether polluted underground water recovery technique field, specifically, is the stripping oxidation of hydrochloric ether polluted underground water and tail gas treatment process.
[background technology]
Because scale operation and the widespread use of chloro organic solvent, hydrochloric ether polluted underground water phenomenon is further outstanding.Because hydrochloric ether has " three cause effect ", human health and ecological safety are consisted of serious threat.At present, China's hydrochloric ether polluted underground water is administered and is repaired research and mostly is in the starting stage, need Practical technology and method that effective treating groundwater pollutes badly, drop in the urgent need to strengthening the science and technology research and development, systematically research and development is fit to groundwater treatment technique or the system of China's national situation.
At present, the restorative procedure of hydrochloric ether polluted underground water has original position reparation and showering.The original position reparation has chemical method and biological process, but length consuming time, cost are high, processes not thoroughly, and secondary pollution is more serious, device handiness, poor operability.Showering is the representative art that underground water is repaired, and is most widely used.Showering comprises to be extracted out in processing, air stripping, ozone decolorization, the low-temperature catalyzed and tail gas and the technology such as absorption.
The clean sky of air stripping method utilization is transferred to gas phase with deliquescent volatile compounds in the water by liquid phase, removes the purpose that hydrochloric ether pollutes in the water to reach.The stripping method is applied to remove the CO that dissolves in the water in early days
2, H
2S, NH
3Deng gas, from middle nineteen seventies, environmental science is constantly carried out the experiment of volatile organic matter in the stripping water, and this technology is used for being subjected to the sewage disposal of volatile organic matter pollution.Because the stripping technology has simply, efficient, reduced investment, the plurality of advantages such as easy to operate, is appointed as the most feasible technology of removal volatile organic contaminant by Environmental Defense.Therefore, the technology for this reason of being designed to of simple in structure, economy, the high-efficiency air stripping tower key that can obtain large-scale application and actively promote in China.
Can only remove volatile pollutent owing to using separately stripping tower processing underground water, process object range less, then need to adopt further processing means for difficult volatile organic compounds, for the processing of volatile organism and difficult volatile organic compounds Composite pollution underground water, need to carry out two steps of ozone oxidation of stripping and the involatile matter of volatile matter for this reason.Air stripping and ozone oxidation are separately carried out separately, but in view of saving facility investment and process cost, develop a kind of multi-functional adverse current stripping oxide compound tower, the high-efficiency air stripping of volatile organism and the oxidation of difficult volatile organic compounds are finished in same device, water outlet at the bottom of the tower is for can directly recharge underground water up to standard, and cat head is discharged the air Mixture of the volatile hydrochloric ether that contains higher concentration.Because the mass-transfer efficiency of board-like stripping tower is more than general bubbling tower height, the follow-up tail gas of stripping can reach directly low-temperature catalyzed desired concn, so the present invention can save the tail gas adsorption enrichment step, the prior art route is improved and effectively combination, introduce simultaneously the interchanger condensation and stripping tail gas is dehumidified be beneficial to reach the condition of catalyticcombustion.For thorough purification of combustion tail gas, use in the alkali lye and absorption products of combustion hydrogenchloride, the present invention adopts packed absorber.Whole technological line has not only realized efficiently removing fast underground water pollutant, saves facility investment and process cost, and has realized the hazardous contaminant exhaustive oxidation, is being with a wide range of applications aspect the hydrochloric ether polluted underground water of processing complexity.
[summary of the invention]
The object of the invention is to overcome the deficiencies in the prior art, the stripping oxidation of hydrochloric ether polluted underground water and tail gas treatment process are provided; Efficient, the economic showering operational path that it can use as engineering scale wherein comprises in multi-functional adverse current stripping oxide compound tower, shell and tube heat exchanger, volatile hydrochloric ether catalytic combustion system and the tail gas containing hydrogen chloride and four major equipments such as absorption tower; Main reparation target is the volatile and difficult volatilization chlorinated hydrocarbon contaminants in the underground water, also comprises the volatile and difficult volatile organic compounds of other high density or lower concentration.
The objective of the invention is to be achieved through the following technical solutions:
The stripping oxidation of hydrochloric ether polluted underground water and tail gas treatment process, concrete steps are that underground water is extracted out, behind elimination impurity, utilizes air stripping method that volatile chlorinated aliphatic hydrocarbon in the water is blown out and the organism ozone decolorization that develops the color; Stripping tail gas contains the hydrochloric ether of high density, carries out catalyticcombustion, answers the steam partial condensation in the tail gas before burning; The hydrogenchloride chemical neutralization that produces in the tail gas after the burning absorbs.
The stripping oxidation of hydrochloric ether polluted underground water and the used equipment of tail gas treatment process comprise in multi-functional adverse current stripping oxide compound tower, shell and tube heat exchanger, volatile hydrochloric ether catalytic combustion system and the tail gas containing hydrogen chloride and the absorption tower; This repair system according in multi-functional adverse current stripping oxide compound tower, shell and tube heat exchanger, volatile hydrochloric ether catalytic combustion system and the tail gas containing hydrogen chloride and the order on absorption tower install, it is connected by pipeline;
Described multi-functional adverse current stripping oxide compound tower, it comprises stripping device and oxidation unit, and stripping device and oxidation unit are formed by connecting by flange arrangement;
Described stripping device is the sieve-board type stripping tower, makes the synthetic glass right cylinder, internal diameter 330mm, and high 1150mm, the shape top is provided with fluid inlet interface and air outlet interface, and the polylith sieve tray is housed in the tower, and stage number is determined by processing requirements.The underground water of extracting out is transported to the fluid inlet at stripping device top by behind the strainer by pipeline by the lifting water pump; Inlet mouth is linked to each other with gas blower by pipeline, carries out both air flow modulation by vortex shedding flowmeter on the gas circuit, and the control vapour-liquid ratio was at 1200: 1; Cleaned air enters tower body, is risen by the bottom by sieve aperture, with the polluted-water cross-flow, has guaranteed that gas-liquid fully contacts.The air that rises together enters shell and tube heat exchanger by the exhaust port at top with the dusty gas that is gone out by stripping; Oxidation unit is the bubbling type oxidation unit with aeration head, and synthetic glass is made, internal diameter 330mm, and high 1000mm comprises aeration head, each feed inlet and outlet and baffle plate; The cylindrical shell top is provided with inlet mouth; The liquid of stripping device enters the oxidation unit place and is provided with feed liquor dividing plate with holes, aperture 10mm; In the middle of the cylindrical shell skim particle diameter being housed is the 5mm granulated glass sphere; The dress aeration head combination of oxidation unit bottom; Cylinder body bottom is provided with water outlet; Water outlet connects outlet conduit with flange; Stripping device and oxidation unit connect into a tower body by flange from top to bottom;
Described volatile hydrochloric ether catalytic combustion system is made by stainless steel, in be provided with small-sized heat-exchanger rig and reaction chamber, the compound noble metal catalyst of La and Ce is housed in the reaction chamber; The outside is provided with backflow bypass, by-pass valve and flow director;
In the described tail gas and absorption tower adopts anti-acid and alkali corrosion material to make, and is the cylindrical pad tower, internal diameter 200mm, and packed height 1000mm, tower height 1400mm, cat head establish clean exhaust port and alkali lye import, and the inner alkali lye of cat head ingress establishes liquid distributor; Ceramic dumped packing is equipped with in the liquid distributor bottom, for absorption process provides the gas-to-liquid contact place; The filler bottom is the inlet air distribution device, and inlet mouth and liquid outlet are established in the bottom, absorption tower;
Described sieve tray is made with synthetic glass, thickness of slab 8mm; Round sieve on the plate is equilateral triangle and arranges aperture 3mm; Seal pot is set, entrance safety zone width, overflow weir, downtake on the sieve plate; Sieve plate seal pot width is 70mm, the recessed 20mm of seal pot, and entrance Anding District width is 15mm; Do not set out a mouthful Anding District; Overflow height of weir 30mm;
Described alkali lye is that concentration is the sodium hydroxide solution of 5-15g/L;
Described connecting tube is steel pipe or pvc pipe.
Compared with prior art, positively effect of the present invention is:
(1) the present invention has made up the sieve-board type stripping tower of showering Organic pollutants underground water according to the groundwater pollution particular case, and in conjunction with comparatively ripe ozonize technology, remove difficult volatile organic compounds and the color producing species, and stripping and ozonize are finished in same device, reduce investment outlay, also guarantee treatment effect and effluent quality; Board-like stripping tower mass-transfer efficiency is high, makes stripping tail gas concentration can reach the essential concentration requirement of catalyticcombustion, can save stripping tail gas enrichment step, reduces investment outlay and process cost;
(2) adverse current stripping oxidation unit flexible operation of the present invention can change stage number according to processing object type, concentration, detachably carries when processing different contaminated site, and is practical and convenient;
(3) the present invention uses catalytic combustion system to process to contain the stripping tail gas of volatile hydrochloric ether, has rapidly thoroughly, the characteristics of non-secondary pollution;
(4) System Design of the present invention is relatively simple and practical, implements comparatively convenient, repairs the underground water wide ranges, and removable pollutant kind is many;
(5) alkali liquor absorption step of the present invention take full advantage of rapidly and efficiently chemical absorption technology come in and the hydrogen chloride gas in the tail gas, up to standard to guarantee discharging tail gas;
(6) tower connects with flange in the system of the present invention, dismounting, convenient transportation, and a whole set of system can be applicable to different contaminated sites, and utility value is high.
[description of drawings]
Fig. 1 process flow diagram of the present invention.
[embodiment]
The embodiment of hydrochloric ether polluted underground water stripping oxidation of the present invention and tail gas treatment process below is provided.
See also accompanying drawing 1, the stripping oxidation of hydrochloric ether polluted underground water and tail gas treatment process, concrete steps are that underground water is extracted out, behind elimination impurity, utilizes air stripping method that volatile chlorinated aliphatic hydrocarbon in the water is blown out and the organism ozone decolorization that develops the color; Stripping tail gas contains the hydrochloric ether of high density, carries out catalyticcombustion, answers the steam partial condensation in the tail gas before burning; The hydrogenchloride chemical neutralization that produces in the tail gas after the burning absorbs.
The stripping oxidation of hydrochloric ether polluted underground water and the used equipment of tail gas treatment process comprise in multi-functional adverse current stripping oxide compound tower, shell and tube heat exchanger, volatile hydrochloric ether catalytic combustion system and the tail gas containing hydrogen chloride and four major equipments such as absorption tower; Described hydrochloric ether polluted underground water efficient repairing complex system according to strainer 1, promote water pump 2, multi-functional adverse current stripping oxide compound tower 3, blower fan 4, shell and tube heat exchanger 5, volatile hydrochloric ether catalytic combustion system 6 and be connected the order of being connected with the absorption tower with tail gas containing hydrogen chloride and install and connected by pipeline.Described multi-functional adverse current stripping oxide compound tower 3 comprises stripping device and oxidation unit, and stripping device and oxidation unit are formed by connecting by flange arrangement;
Described stripping device is the sieve-board type stripping tower, makes the synthetic glass right cylinder, internal diameter 330mm, and high 1150mm, the shape top is provided with fluid inlet interface and air outlet interface, and polylith sieve tray 8 is housed in the tower, and stage number is determined by processing requirements.The underground water of extracting out is transported to the fluid inlet at stripping device top by behind the strainer 1 by pipeline by lifting water pump 2; Inlet mouth is linked to each other with gas blower by pipeline, carries out both air flow modulation by vortex shedding flowmeter on the gas circuit, and the control vapour-liquid ratio was at 1200: 1; Cleaned air enters tower body, is risen by the bottom by sieve aperture, with the polluted-water cross-flow, has guaranteed that gas-liquid fully contacts.The air that rises together enters shell and tube heat exchanger 5 by the exhaust port at top with the dusty gas that is gone out by stripping; Oxidation unit is the bubbling type oxidation panel with aeration head, makes with synthetic glass, and internal diameter 330mm, high 1000mm comprises aeration head, each feed inlet and outlet and baffle plate; The cylindrical shell top is provided with inlet mouth; The liquid of stripping device enters the oxidation unit place and is provided with feed liquor dividing plate with holes, aperture 10mm; In the middle of the cylindrical shell skim particle diameter being housed is the 5mm granulated glass sphere; The dress aeration head combination of oxidation unit bottom; Cylinder body bottom is provided with water outlet; Water outlet connects outlet conduit with flange; Stripping device and oxidation unit connect into a tower body by flange from top to bottom;
Described volatile hydrochloric ether catalytic combustion system 6 is made by stainless steel, in be provided with small-sized heat-exchanger rig and reaction chamber, compound noble metal catalyst is housed in the reaction chamber; The outside is provided with backflow bypass, by-pass valve and flow director;
In the described tail gas and absorption tower 7 adopts anti-acid and alkali corrosion material to make, and is the cylindrical pad tower, internal diameter 200mm, packed height 1000mm, tower height 1400mm, cat head establish clean exhaust port and alkali lye 10 imports, and the inner alkali lye of cat head ingress establishes liquid distributor; Ceramic dumped packing is equipped with in the liquid distributor bottom, for absorption process provides the gas-to-liquid contact place; The filler bottom is the inlet air distribution device, and inlet mouth and liquid outlet are established in the bottom, absorption tower;
Described sieve tray is made with synthetic glass, thickness of slab 8mm; Round sieve on the plate is equilateral triangle and arranges aperture 3mm; Seal pot is set, entrance safety zone width, overflow weir, downtake on the sieve plate; Sieve plate seal pot width is 70mm, the recessed 20mm of seal pot, and entrance Anding District width is 15mm; Do not set out a mouthful Anding District; Overflow height of weir 30mm;
Described alkali lye is that concentration is the sodium hydroxide solution of 5-15g/L;
Described connecting tube is steel pipe or pvc pipe.
Water in a plurality of wells is by pipe influx house steward Yu Yigen, pending underground water process filter 1 is the impurity filtering in the water, water after the filtration is sent into the fluid inlet of multi-functional adverse current stripping oxide compound tower 3 cats head by lifting water pump 2, arrive on first block of column plate 8 in the stripping tower, current are the abundant stripping of process air in crossing the process of sieve plate, flow into the next stage column plate via downtake again, through behind the multistage stripping, volatile hydrochloric ether is removed substantially in the water.By the stripping section, the water of having removed volatile organic matter enters oxidation panel and carries out ozonize, makes difficult volatile organic compounds and colour developing organism by ozone 9 oxidations, and is up to standard and directly be recycled into underground by rising pipe after the water treatment.Stripping tail gas enters shell and tube heat exchanger 5 by exhaust pipe and carries out dehumidification by condensation.After the tail gas of removing most of steam reaches the condition of catalyticcombustion, introducing volatile hydrochloric ether catalytic combustion system 6 by pipeline reacts, after the reaction out tail gas divide two-way, a part enters bypass duct, being back to inlet mouth mixes with new charge, reach catalyzed reaction with the raising gas temperature temperature required, alkali liquor absorption is carried out in during another part then enters and 7 bottoms, absorption tower.In and in the absorption tower 7, tail gas containing hydrogen chloride fully contact absorption with alkali lye on filler, hydrogenchloride and sodium hydroxide generation chemical reaction on filler, hydrogenchloride by in the sodium hydroxide with complete, totally tail gas rises to reactor head, rear discharging up to standard.
Detailed process is:
(1) water inlet stripping oxidation experiment: the underground water that polluted by multiple hydrochloric ether with vacuum primingpump is brought up in well, filters out impurities through filtration unit, and the water after the filtration is burgundy.Trieline concentration is 750mg/L in the water after testing, and tce concentration is 200mg/L, 2-chlorophenol concentration 0.894mg/L, and dioctyl phthalate (DOP) concentration 0.02mg/L, and contain 0.02mg/L chromium.With promoting water pump underground water is sent in the cat head fluid inlet, the stripping device bottom air inlet blasts cleaned air with gas blower, slowly passes into ozone at oxidation panel simultaneously.After system reaches and stablizes, stripping tower water outlet TCE concentration is about 0.1mg/L, and PCE concentration is about 0.02mg/L, and water outlet is decoloured at the bottom of the tower, the whole clearance of hydrochloric ether is about 99% in the water, and as seen this equipment can reach good effect to the underground water reparation that contains volatile and difficult volatilization coloured contaminant.
(2) dehumidifying experiment: tail gas contains a large amount of steam behind the stripping, and relative humidity 98% must be removed about moisture to 10% and just can be carried out catalyzed reaction.The stripping tail gas of above-mentioned experiment is passed into the shell side of shell and tube heat exchanger, subzero 10 ℃ of sodium chloride brines pass into the tube side of interchanger, and behind the two fluid communication heats, the moisture in the gas phase will be condensed into liquid state, tail gas relative humidity energy about 10%.
(3) low-temperature catalytic burning experiment: above-mentioned experiment dry gas is passed into catalytic combustion system react, total molar fraction of air inlet TCE and PCE is 1.6%, temperature of reaction is mixed to keep by the reflux heat reaction gas, the total conversion rate of TCE and PCE is more than 85%, reaction product is mainly carbonic acid gas, carbon monoxide, hydrogen chloride gas, illustrates that adopting composite catalyst that TCE and PCE are decomposed is effective method.
(4) alkali liquor absorption experiment: the concentration of hydrogen chloride in tail gas gas is about about 4.8%, is that the hydrogenchloride clearance reaches more than 99% in the sodium hydroxide solution of 5-15g/L and after absorbing through concentration.
System of the present invention is structurally, formal and operational design all passes through and take into full account, and designs perfectly, workable, processes object range wide, have efficient, fast thoroughly, the characteristics of non-secondary pollution; Simultaneously tower dismounting, convenient transportation in the system, but repeated application in different contaminated sites, utility value is high; Also can be used for removing the hazardous contaminant matter in other Organic pollutants underground water, for the reparation of organic contamination underground water provides a kind of Practical and had the effectively optimizing system of broad prospect of application.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, without departing from the inventive concept of the premise; can also make some improvements and modifications, these improvements and modifications also should be considered within the scope of protection of the present invention.
Claims (8)
1. the used equipment of the oxidation of hydrochloric ether polluted underground water stripping and tail gas treatment process is characterized in that, comprises in multi-functional adverse current stripping oxide compound tower, shell and tube heat exchanger, volatile hydrochloric ether catalytic combustion system and the tail gas containing hydrogen chloride and the absorption tower; This equipment according in multi-functional adverse current stripping oxide compound tower, shell and tube heat exchanger, volatile hydrochloric ether catalytic combustion system and the tail gas containing hydrogen chloride and the order on absorption tower install, it is connected by pipeline.
2. hydrochloric ether polluted underground water stripping oxidation as claimed in claim 1 and the used equipment of tail gas treatment process, it is characterized in that, described multi-functional adverse current stripping oxide compound tower, it comprises stripping device and oxidation unit, and stripping device and oxidation unit are formed by connecting by flange arrangement.
3. hydrochloric ether polluted underground water stripping oxidation as claimed in claim 2 and the used equipment of tail gas treatment process, it is characterized in that, described stripping device is the sieve-board type stripping tower, make the synthetic glass right cylinder, the top is provided with fluid inlet interface and air outlet interface, and the polylith sieve tray is housed in the tower.
4. hydrochloric ether polluted underground water stripping oxidation as claimed in claim 2 and the used equipment of tail gas treatment process, it is characterized in that, described oxidation unit is the bubbling type oxidation unit with aeration head, is made by synthetic glass, comprise aeration head, each feed inlet and outlet and baffle plate; The cylindrical shell top is provided with inlet mouth; The liquid of stripping device enters the oxidation unit place and is provided with feed liquor dividing plate with holes; In the middle of the cylindrical shell skim particle diameter being housed is the 5mm granulated glass sphere; The dress aeration head combination of oxidation unit bottom; Cylinder body bottom is provided with water outlet; Water outlet connects outlet conduit with flange; Stripping device and oxidation unit connect into a tower body by flange from top to bottom.
5. hydrochloric ether polluted underground water stripping oxidation as claimed in claim 1 and the used equipment of tail gas treatment process, it is characterized in that, described volatile hydrochloric ether catalytic combustion system is made by stainless steel, in be provided with small-sized heat-exchanger rig and reaction chamber, the compound noble metal catalyst of La and Ce is housed in the reaction chamber; The outside is provided with backflow bypass, by-pass valve and flow director.
6. hydrochloric ether polluted underground water stripping oxidation as claimed in claim 1 and the used equipment of tail gas treatment process, it is characterized in that, in the described tail gas and absorption tower adopts anti-acid and alkali corrosion material to make, be the cylindrical pad tower, cat head is established clean exhaust port and alkali lye import, and the inner alkali lye of cat head ingress establishes liquid distributor; Ceramic dumped packing is equipped with in the liquid distributor bottom, for absorption process provides the gas-to-liquid contact place; The filler bottom is the inlet air distribution device, and inlet mouth and liquid outlet are established in the bottom, absorption tower.
7. hydrochloric ether polluted underground water stripping oxidation as claimed in claim 3 and the used equipment of tail gas treatment process is characterized in that, described sieve tray is made with synthetic glass, thickness of slab 8mm; Round sieve on the plate is equilateral triangle and arranges aperture 3mm; Seal pot is set, entrance Anding District width, overflow weir, downtake on the sieve plate; Sieve plate seal pot width is 70mm, the recessed 20mm of seal pot, and entrance Anding District width is 15mm; Do not set out a mouthful Anding District; Overflow height of weir 30mm.
8. hydrochloric ether polluted underground water stripping oxidation as claimed in claim 1 and the used equipment of tail gas treatment process is characterized in that, described connecting tube is steel pipe or pvc pipe.
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| CN 201110108336 CN102367187B (en) | 2011-04-28 | 2011-04-28 | Chlorinated hydrocarbon-polluted underground water blowing oxidation and tail gas treatment process |
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| CN 201110108336 CN102367187B (en) | 2011-04-28 | 2011-04-28 | Chlorinated hydrocarbon-polluted underground water blowing oxidation and tail gas treatment process |
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| CN102942266A (en) * | 2012-11-13 | 2013-02-27 | 常州大学 | Bromo-aliphatic hydrocarbon compound production waste water treatment method |
| CN105152256B (en) * | 2015-10-14 | 2017-07-21 | 山东省城市供排水水质监测中心 | A kind of fixation packed bed aeration stripping system and method for being used to remove underground water carbon tetrachloride |
| CN107555690A (en) * | 2017-10-20 | 2018-01-09 | 徐翔 | Water-based metal cutting fluid environmental protection treatment unit and technique |
| CN107963680B (en) * | 2018-01-05 | 2023-12-26 | 山东众音化学科技有限公司 | High ammonia nitrogen wastewater treatment method and device |
| CN111592157B (en) * | 2020-05-21 | 2024-09-03 | 宝航环境修复有限公司 | Handle high-efficient air stripping device of VOC contaminated groundwater |
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Inventor after: Lin Kuangfei Inventor after: Zhang Wei Inventor after: Li Hui Inventor after: Liu Lili Inventor after: Jia Nan Inventor after: Li Jing Inventor after: Zhang Xiuping Inventor after: Zhang Meng Inventor after: Liao Zhiqiang Inventor after: Zhang Jianyong Inventor after: Li Lin Inventor after: Li Li Inventor after: Luo Qishi Inventor after: Yang Jie Inventor after: Li Bingzhi Inventor after: Shen Tingting Inventor after: Peng Junbiao Inventor after: Lin Lichong Inventor after: Ruan Yang Inventor after: Zhou Jian Inventor after: Wang Qian Inventor before: Lin Kuangfei Inventor before: Li Jing Inventor before: Zhang Xiuping Inventor before: Zhang Meng Inventor before: Liao Zhiqiang Inventor before: Zhang Jianyong Inventor before: Li Lin Inventor before: Luo Qishi Inventor before: Yang Jie Inventor before: Li Li Inventor before: Li Bingzhi Inventor before: Peng Junbiao Inventor before: Lin Lichong Inventor before: Zhang Wei Inventor before: Li Hui Inventor before: Liu Lili Inventor before: Jia Nan |
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