CN101239743A - Device and technique for removing volatile injurant from waste water - Google Patents
Device and technique for removing volatile injurant from waste water Download PDFInfo
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- CN101239743A CN101239743A CNA2008100601169A CN200810060116A CN101239743A CN 101239743 A CN101239743 A CN 101239743A CN A2008100601169 A CNA2008100601169 A CN A2008100601169A CN 200810060116 A CN200810060116 A CN 200810060116A CN 101239743 A CN101239743 A CN 101239743A
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Abstract
The present invention provides an apparatus and process of removing evaporable hazardous substance in waste water, the apparatus is composed of one or more gas-liquid-solid three-phase discharging reactor in series, the discharging reactor includes a reactor, the reactor us divided into an upper chamber and an lower chamber by a dielectric ceramic layer filling with dielectric ceramic grain, the upper chamber and the lower chamber are set with inverse discharging electrodes respectively. The apparatus is a process for removing evaporable hazardous substance in waste water, two discharging electrodes are set on the top and the lower of the liquid level respectively, blasting aeration gas lifting evaporable hazardous substance forming gas phase containing evaporable hazardous substance on the liquid level in waste water, generating free radical reaction in gas-phase and liquid-phase utilizing discharging at the same time, degradation the evaporable hazardous substance in waste water and gas-phase. The invention has a high removing efficiency, lower operating cost, and a simple operation and wide application.
Description
Technical field
The present invention relates to a kind of device and technology of from waste water, removing volatile injurant.
Background technology
Fast development along with chemical industry, various synthetic species are various day by day, and being widely used in various production processes such as chemistry, pharmacy, semi-conductor and application industry, these compounds are using the rear section to discharge along with waste water or are entering water body by sedimentation.These compounds are poisonous mostly, often have " three cause " (carcinogenic, teratogenesis, cause prominent) characteristic, cause serious threat to human beings'health.China GB3838-2002 " water environment quality standard " has clear and definite regulation to nuisance content in the water; The nuisance that contains in the waste water of GB8978-1996 " integrated wastewater discharge standard " to discharging also has clear and definite regulation.These waste water need be handled and just can enter water body after up to standard.
At present, the mode of biochemical treatment is adopted in these processing that contain the waste water of volatile injurant usually, handle through the anaerobic and aerobic aeration and discharge after making waste water reach emission standard.But, the volatile injurant in this treating processes in the waste water, especially foul gas, as materials such as formaldehyde, methyl alcohol, organic sulfide and organic amines, enter atmospheric environment by volatilization, thereby the ecology of having a strong impact on, social environment is detrimental to health.
Summary of the invention
Technical problem to be solved by this invention provides a kind of device and technology of removing volatile injurant from waste water, adopt device of the present invention, gas discharge plasma is in conjunction with the simultaneous oxidation of gas-liquid phase, from waste water, remove volatile injurant, removal efficient height, energy consumption is little, and device operation cost of use is cheap.
The technical solution adopted in the present invention is: a kind of device of removing volatile injurant from waste water, described device is composed in series by one or more gas-liquid-solid three-phase discharge reactor, described gas-liquid-solid three-phase discharge reactor comprises reaction chamber, described reaction chamber is divided into upper cavity and lower chamber by being filled with dielectric ceramic particulate dielectric ceramic layer, described upper cavity and lower chamber are respectively equipped with opposite discharge electrode, one of them discharge electrode is connected with positive source, another discharge electrode is connected with the power cathode or zero utmost point, the relative upper cavity discharge electrode of described reactor wall lower portion is respectively equipped with waterwater entrance, wastewater outlet, described reaction chamber is provided with the aeration gas inlet, and described upper cavity top is provided with pneumatic outlet.
The dielectric ceramic particle is unsaturated filling in the dielectric ceramic layer of the present invention, and the dielectric ceramic particulate specific inductivity that is adopted is generally 10-8000, and specific inductivity is big more, and it is high more that voltage is worn in resistance, and effect is good more.Described dielectric ceramic particle is generally spherical or cylindrical, and particle diameter is generally 0.5～25mm.Preferred dielectric ceramic particle is that specific inductivity is 2000～6000 ferroelectrics barium titanate particles or lead titanate particle, and is about the same at this dielectric constant range treatment effect, and particle is spherical, and particle diameter is generally 0.5～5mm.The preparation of dielectric ceramic can be referring to relevant pottery preparation handbook, and all there is production in relevant both at home and abroad Production of Ceramics producer.
The aeration gas inlet of device of the present invention is located at lower chamber, and described aeration gas inlet can also be provided with gas pipe and be communicated with reaction chamber, makes that gas distribution is even and can control gas velocity.
Discharge electrode of the present invention is to mainly wired-board-like, plate-plate and pin-board-like etc., specifically can referring to pertinent literature (the chemical industry progress, 2007,26:957-963).
When described device is composed in series by plural gas-liquid-solid three-phase discharge reactor.Generally speaking, during reactors in series, the pneumatic outlet of last reactor and wastewater outlet are communicated with the aeration gas inlet and the waterwater entrance of back one reactor respectively, and described wastewater outlet is recommended to be located on the reactor wall of position between relative dielectric ceramic layer upper edge and the upper cavity discharge electrode.
Said apparatus is used to contain the processing of volatile injurant waste water, its technical scheme is: a kind of technology of removing volatile injurant from waste water, treating processes is as follows: adopt said apparatus, the pending waste water that contains volatile injurant is imported gas-liquid-solid three-phase discharge reactor, make the waste water liquid level be higher than dielectric ceramic layer and wastewater outlet but be lower than discharge electrode in the reactor upper cavity, blasting aeration gas gas belt in waste water goes out volatile injurant form the gas phase that contains volatile injurant above liquid level, simultaneously the discharge electrode that is arranged on the discharge electrode in the upper cavity and be arranged in the lower chamber is powered, take place discharge make in the waste water and gas phase in volatile injurant obtain degraded, waste water after the processing and gas are discharged from wastewater outlet and pneumatic outlet respectively.
In treating processes two discharge electrodes are applied voltage, under electric field action, liquid level top and liquid level lower edge dielectric surface generation electric discharge phenomena produce O, HO simultaneously in gas phase and liquid phase
2, O
3, and OH isoreactivity particle, the nuisance in these active particles and waste water and the gas reacts, and finally nuisance is degraded.Specifically, corona discharge takes place in gas phase produce active particle, and in waste water, dielectric ceramic particle in the dielectric ceramic layer polarizes under electric field action, in particle surface generation electrochemical reaction, promptly in particle one end generation anodic reaction, and in the other end generation cathodic reaction, under the effect of aeration gas flow, produced OH, HO by collision between particle with strong oxidizing property
2Deng free radical, reach the effect of three-diemsnional electrode, these strong oxidizing substances and the nuisance generation chemical reaction that flows through in the solution in its slit are converted into harmless object to nuisance.
The distance that can regulate two discharge electrodes among the present invention is regulated the input of energy.General liquid level upper electrode is apart from liquid level 1-100mm.Described power supply mode is pulse or Alternating Current Power Supply, and the voltage peak that power supply produces is 10-100kV, and pulse or a-c cycle are 10-1000Hz.
Volatile injurant described in the present invention is volatile organic matter and/or volatility inorganics, and described volatile organic matter is hydrocarbon, alcohol, ether, aldehyde, phenol, ketone, ester, amine etc., and described volatility inorganics is hydrogen sulfide, sulfurous gas, ammonia etc.
Aeration gas described in the present invention generally adopts air or oxygen, also can adopt the mixed gas of rare gas element or rare gas element and oxygen, as be mixed gas, and oxygen content is generally 0.5-95% in the mixed gas, and the few discharge effect of oxygen level is good.Rare gas element can be nitrogen, argon gas, helium, neon etc., and its effect is about the same.Aeration gas gas belt goes out the volatile contaminant in the waste water, and aeration gas was generally 0.1～30 second in the residence time of aqueous phase, and vapour-liquid ratio (the water dilatation is defined as vapour-liquid ratio with the ratio of former water volume behind the feeding aeration gas) is generally 0.05～0.8.The waste water that contains volatile injurant among the present invention can be preface batch processing or flowing process, and the use of also can connecting of described reactor is with further raising degradation efficiency.
Compared with prior art, the invention has the advantages that: the present invention adopts geseous discharge in conjunction with the three-diemsnional electrode method, remove the volatile injurant that contains in the waste water, by the electrode of water surface top and water surface bottom is set, can utilize gas phase corona discharge and three-diemsnional electrode to produce the reaction free radical in gas phase and water simultaneously, the volatile injurant in the waste water is degraded, have the efficient of removal height, move advantages such as cost of use is cheap, and install simple to operately, be fit to promote the use of.
Description of drawings
Fig. 1 is the structural representation of the gas-liquid-solid three-phase discharge reactor of embodiment 1 employing: the discharge electrode in 1 lower chamber; 2 waterwater entrances; 3 dielectric ceramic layers; Discharge electrode in 4 upper cavities; 5 pneumatic outlets; 6 wastewater outlets; 7 aeration gas inletes.
Fig. 2 is the gas-liquid-solid three-phase discharge reactor two-stage series connection combination synoptic diagram that embodiment 2 adopts.
Embodiment
Below in conjunction with specific embodiment the present invention is described in further detail, but protection scope of the present invention is not limited thereto.
Embodiment 1:
The experimental installation system flow is as shown in Figure 1: gas-liquid-solid three-phase discharge reactor comprises reaction chamber, described reaction chamber is divided into upper cavity and lower chamber by being filled with dielectric ceramic particulate dielectric ceramic layer 3, described upper cavity and lower chamber are respectively equipped with opposite discharge electrode 4,1, one of them discharge electrode is connected with positive source, another discharge electrode is connected with the power cathode or zero utmost point, the relative dielectric ceramic layer of described reactor wall position is respectively equipped with waterwater entrance 2, wastewater outlet 6, described wastewater outlet is located at relative dielectric ceramic layer top near on the reactor wall of upper cavity discharge electrode position, described reaction chamber is provided with aeration gas inlet 7, and described upper cavity top is provided with pneumatic outlet 5.
Wastewater treatment process is as follows: the pending waste water that contains volatile injurant is imported gas-liquid-solid three-phase discharge reactor, make the waste water liquid level be higher than dielectric ceramic layer 3 but be lower than discharge electrode 4 in the reactor upper cavity, blasting aeration gas gas belt in waste water goes out volatile injurant form the gas phase that contains volatile injurant above liquid level, simultaneously the discharge electrode 1 that is arranged on the discharge electrode 4 in the upper cavity and be arranged in the lower chamber is powered, take place discharge make in the waste water and gas phase in volatile injurant obtain degraded, waste water after the processing and gas are discharged from wastewater outlet 6 and pneumatic outlet 5 respectively.
Conditional parameter is provided with as follows: the gas-liquid-solid three-phase discharge reactor scantlings of the structure is 250mm * 200mm * 80mm; electrode pair is a pin-board-like; water surface top is pin electrode; pin spacing is from being 12mm; water clearance is 10mm; water surface bottom is the web plate electrode; waste water layer height 50mm; dielectric ceramic material is barium titanate particles or alumina ceramic grain; particle diameter is 2.5mm; the specific inductivity of barium titanate particles is 4200, and the specific inductivity of alumina ceramic grain is 55, and dielectric ceramic layer piling height is 40mm.Aeration gas is air, and gas is 0.5s in the water residence time, and vapour-liquid ratio (volume) is 0.3.The discharge process time is 3min.
Power parameter: the pulse power, power 0.2kW, the about 23kV of crest value of impulse voltage, pulse-repetition 80Hz;
Waste water composition: volatile injurant/water
Experimental result: as shown in table 1.
The situation that contains different volatile injurants in table 1 waste water
| Embodiment | Volatile injurant | Waste water inlet concentration (mg/l) | Wastewater outlet concentration (mg/l) | ||
| Barium titanate | Aluminum oxide | No dielectric layer | |||
| 1-1 | Methylene dichloride | 163 | 37 | 45 | 69 |
| 1-2 | Trieline | 210 | 25 | 32 | 53 |
| 1-3 | Acetone | 190 | 31 | 37 | 46 |
| 1-4 | Thiomethyl alcohol | 125 | 19 | 40 | 49 |
| 1-5 | Formaldehyde | 241 | 41 | 56 | 68 |
| 1-6 | Toluene | 95 | 20 | 33 | 44 |
| 1-7 | Phenol | 46 | 5 | 7 | 11 |
| 1-8 | Ethyl acetate | 130 | 21 | 29 | 43 |
| 1-9 | Dimethylamine | 155 | 35 | 47 | 61 |
| 1-10 | Hydrogen sulfide | 65 | 6 | 9 | 10 |
| 1-11 | Sulfurous gas | 110 | 10 | 15 | 17 |
| 1-13 | Ammonia | 140 | 45 | 55 | 62 |
| 1-14 | Toluene+acetone | 240 | 53 | 68 | 81 |
| 1-15 | Hydrogen sulfide+toluene | 150 | 22 | 35 | 46 |
Embodiment 2: experimental installation as shown in Figure 2, be that two single reactors in series with example 1 are formed, the pneumatic outlet of last reactor and wastewater outlet are communicated with the aeration gas inlet and the waterwater entrance of back one reactor respectively, structure of reactor is of a size of 250mm * 200mm * 80mm, and former discharge electrode is to changing line-board-like into, and water surface top is line electrode, wire spacing is 12mm, dielectric materials is a barium titanate particles, and aeration gas is air or oxygen or rare gas element or mixed gas, and other are with example 1.
Power parameter: AC power, power 0.2kW; Voltage peak is 25kV, pulse-repetition 50Hz;
Waste water composition: volatile injurant/water;
Wastewater flow is 0.01m
3/ h;
Experimental result: as shown in table 2.
The situation that contains different volatile injurants in table 2 waste water
| Embodiment | Volatile injurant | Waste water inlet concentration (mg/l) | Wastewater outlet concentration (mg/l) | Aeration gas |
| 2-1 | Methylene dichloride | 163 | 37 | Air |
| 2-2 | Methylene dichloride | 163 | 52 | Nitrogen |
| 2-3 | Methylene dichloride | 163 | 42 | Oxygen |
| 2-4 | Methylene dichloride | 163 | 41 | Argon gas |
| 2-5 | Methylene dichloride | 163 | 21 | Argon gas+5% oxygen |
| 2-6 | Trieline | 210 | 25 | Air |
| 2-7 | Trieline | 210 | 15 | Neon+5% oxygen |
| 2-8 | Acetone | 190 | 31 | Air |
| 2-9 | Thiomethyl alcohol | 125 | 19 | Oxygen |
| 2-10 | Formaldehyde | 241 | 41 | Air |
| 2-11 | Toluene | 95 | 20 | Air |
| 2-12 | Toluene | 95 | 13 | Argon gas+10% oxygen |
| 2-13 | Phenol | 46 | 5 | Helium |
| 2-14 | Ethyl acetate | 130 | 32 | Nitrogen |
| 2-15 | Dimethylamine | 155 | 24 | Air |
| 2-16 | Hydrogen sulfide | 65 | 3 | Neon |
| 2-17 | Sulfurous gas | 110 | 5 | Argon gas |
| 2-18 | Ammonia | 140 | 30 | Air |
Claims (10)
1, a kind of device of from waste water, removing volatile injurant, it is characterized in that described device is composed in series by one or more gas-liquid-solid three-phase discharge reactor, described gas-liquid-solid three-phase discharge reactor comprises reaction chamber, described reaction chamber is divided into upper cavity and lower chamber by being filled with dielectric ceramic particulate dielectric ceramic layer, described upper cavity and lower chamber are respectively equipped with opposite discharge electrode, one of them discharge electrode is connected with positive source, another discharge electrode is connected with the power cathode or zero utmost point, the relative upper cavity discharge electrode of described reactor wall lower portion is respectively equipped with waterwater entrance, wastewater outlet, described reaction chamber is provided with the aeration gas inlet, and described upper cavity top is provided with pneumatic outlet.
2, device as claimed in claim 1 is characterized in that described dielectric ceramic particulate specific inductivity is 10～8000, and described dielectric ceramic particle is in the unsaturated filling of dielectric ceramic layer.
3, device as claimed in claim 2 is characterized in that described dielectric ceramic particle for spherical or cylindrical, and particle diameter is 0.5～25mm.
4, device as claimed in claim 3 is characterized in that described dielectric ceramic particle is that specific inductivity is 2000～6000 ferroelectrics barium titanate particles or lead titanate particle.
5, as the described device of one of claim 1～4, it is characterized in that when described device is composed in series by plural gas-liquid-solid three-phase discharge reactor, the pneumatic outlet of last reactor and wastewater outlet are communicated with the aeration gas inlet and the waterwater entrance of back one reactor respectively, and described wastewater outlet is located on the reactor wall of position between relative dielectric ceramic layer upper edge and the upper cavity discharge electrode.
6, the technology of removing volatile injurant from waste water is installed in a kind of utilization according to claim 1, the treating processes that it is characterized in that described technology is as follows: the pending waste water that contains volatile injurant is imported gas-liquid-solid three-phase discharge reactor, make the waste water liquid level be higher than dielectric ceramic layer and wastewater outlet but be lower than discharge electrode in the reactor upper cavity, blasting aeration gas gas belt in waste water goes out volatile injurant form the gas phase that contains volatile injurant above liquid level, simultaneously the discharge electrode that is arranged on the discharge electrode in the upper cavity and be arranged in the lower chamber is powered, take place discharge make in the waste water and gas phase in volatile injurant obtain degraded, waste water after the processing and gas are discharged from wastewater outlet and pneumatic outlet respectively.
7, technology as claimed in claim 6 is characterized in that described volatile injurant is volatile organic matter and/or volatility inorganics.
8, technology as claimed in claim 6 is characterized in that described volatile injurant is following one or more mixing: hydrocarbon, alcohol, ether, aldehyde, phenol, ketone, ester, amine, hydrogen sulfide, sulfurous gas, ammonia.
9, technology as claimed in claim 6 is characterized in that described power supply mode is pulse or Alternating Current Power Supply, and the voltage peak that power supply produces is 10～100kV, and pulse or a-c cycle are 10～1000Hz.
10, technology as claimed in claim 6 is characterized in that described aeration gas adopts the mixed gas of air, oxygen, rare gas element or rare gas element and oxygen; Described rare gas element is nitrogen, argon gas, neon or helium.
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| CNA2008100601169A CN101239743A (en) | 2008-03-07 | 2008-03-07 | Device and technique for removing volatile injurant from waste water |
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Cited By (6)
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| CN101654289B (en) * | 2009-09-11 | 2011-05-04 | 哈尔滨工业大学 | Pressure stabilizing well and method for using same for treating sudden volatile substance pollution of water source |
| CN103951060A (en) * | 2014-04-11 | 2014-07-30 | 广东紫方环保技术有限公司 | Phthalic diamin waste water processing system and adjusting method thereof |
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| CN111137957A (en) * | 2019-12-31 | 2020-05-12 | 河海大学常州校区 | Gas-liquid-solid three-phase pulse discharge electrical characteristic research experimental device and method thereof |
| CN112495159A (en) * | 2020-11-30 | 2021-03-16 | 武汉大学 | Series device for sulfur hexafluoride gas degradation treatment |
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2008
- 2008-03-07 CN CNA2008100601169A patent/CN101239743A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101654289B (en) * | 2009-09-11 | 2011-05-04 | 哈尔滨工业大学 | Pressure stabilizing well and method for using same for treating sudden volatile substance pollution of water source |
| CN103951060A (en) * | 2014-04-11 | 2014-07-30 | 广东紫方环保技术有限公司 | Phthalic diamin waste water processing system and adjusting method thereof |
| CN103951060B (en) * | 2014-04-11 | 2016-05-18 | 广东紫方环保技术有限公司 | A kind of O-phthalic amine Waste Water Treatment and control method thereof |
| CN108529650A (en) * | 2018-03-19 | 2018-09-14 | 江苏燎原环保科技股份有限公司 | A kind of method that sulphide removal is removed in sodium thiocyanate solution |
| CN108529650B (en) * | 2018-03-19 | 2021-06-25 | 江苏燎原环保科技股份有限公司 | Method for removing sulfide from sodium thiocyanate solution |
| CN110451606A (en) * | 2019-08-12 | 2019-11-15 | 浙江工业大学 | A kind of wastewater treatment equipment |
| CN111137957A (en) * | 2019-12-31 | 2020-05-12 | 河海大学常州校区 | Gas-liquid-solid three-phase pulse discharge electrical characteristic research experimental device and method thereof |
| CN112495159A (en) * | 2020-11-30 | 2021-03-16 | 武汉大学 | Series device for sulfur hexafluoride gas degradation treatment |
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