CN105084618A - System for advanced degradation of hardly degradable organic pollutants in wastewater by low-temperature oxygen plasmas - Google Patents
System for advanced degradation of hardly degradable organic pollutants in wastewater by low-temperature oxygen plasmas Download PDFInfo
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- CN105084618A CN105084618A CN201510392162.9A CN201510392162A CN105084618A CN 105084618 A CN105084618 A CN 105084618A CN 201510392162 A CN201510392162 A CN 201510392162A CN 105084618 A CN105084618 A CN 105084618A
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Abstract
The invention discloses a system for advanced degradation of hardly degradable organic pollutants in wastewater by low-temperature oxygen plasmas, belongs to the resource utilization technology of organic wastewater, and relates to a recycling system and a recycling method for treating wastewater containing hardly degradable organic pollutants. The system is characterized by comprising a wastewater primary treatment system, a reaction tower, a low-temperature oxygen plasma generator, a high-frequency high-voltage power supply, a low-temperature oxygen plasma concentration online detector, a power modulator, a residual oxygen plasma eliminator and the like. The method for advanced degradation of hardly degradable organic pollutants in wastewater comprises: wastewater containing hardly degradable organic pollutants is injected through the upper end of the reaction tower; the low-temperature oxygen plasmas generated by the low-temperature oxygen plasma generator are fed into the reaction tower from the lower end of the reaction tower, wherein in the reaction tower, the low-temperature oxygen plasmas carry out advanced degradation of hardly degradable organic pollutants in wastewater, the COD concentration of the organic pollutants is reduced from 148.4 mg/L to 27.4 mg/L; and after the reaction, the residual low-temperature oxygen plasmas are reduced to oxygen through the residual oxygen plasma eliminator to be exhausted.
Description
Technical field
The invention belongs to organic wastewater resources regeneration and utilize technology, a kind of process contains the system of persistent organic pollutant wastewater resource utilization.
Background technology
Water is the most valuable natural resourcess of the mankind.Along with socioeconomic fast development, the organic pollutant value volume and range of product entered in water also sharply increases thereupon, causes water body severe contamination, and especially those toxicity are comparatively strong and the organic waste water of difficult degradation is all the more so.The physics of usual employing routine, chemistry, biological method process waste water, be generally called 1,2 grade of (elementary) method of wastewater treatment, can COD in waste water (ChemicalOxygenDemand, secondary indication Organic substance in water) concentration from thousands of mg/L degraded to 160mg/L ~ 100mg/L.Compound and the organic cyanides such as the polycyclic aromatic hydrocarbons containing pole difficult degradation in waste water after primary treatment, heterocyclic, chlorinated aromatic, phenol and cresols class, nitrogen base, organic synthesis polymer.Containing these Persistent organic pollutants, more needing further depth degradation in the hope of reaching the reuse water technological standard (COD concentration≤50mg/L) of pressing needs, adopting Persistent organic pollutants method Problems existing in high-level oxidation technology depth degradation waste water to be need to add the chemical reagent such as a large amount of oxygenant, catalyzer and initiator at present; Degradation time is long, and mostly at 1h ~ 4h, what have reaches 7h; Containing Fe in Fenton method or Fenton-like method processed waste water
2+pollutent new for other metal ion etc.; By Ozone exists that production rate is low, utilization ratio is low, COD clearance is low and the problem such as energy consumption is large; Supercritical water oxidation method is high to equipment, processing requirement, and one-time investment is large, also there is the problem such as equipment corrosion, salt sedimentation.
Summary of the invention
The present invention overcomes Persistent organic pollutants weak point in existing depth degradation waste water, the system and method for Persistent organic pollutants in low-temperature oxygen plasma depth degradation waste water is provided, it is characterized in that this system comprises waste water primary treatment system, reaction tower, low-temperature oxygen plasma generator, high-frequency and high-voltage power supply, low-temperature oxygen plasma concentration on-line detector, power regulation device, water pump, pipeline, COD Quick testing instrument, liquid valve, liquid meter, gas trap, gas meter, residue oxygen plasma eliminator, the described organic pollutant wastewater that contains is processed into containing persistent organic pollutant wastewater through waste water primary treatment system, connect after pump entrance end is transported to reaction tower upper end water inlet through water pipe end and inject reaction tower, described water pipe is equipped with online COD Quick testing instrument, detects in water pipe containing persistent organic pollutant wastewater COD concentration, wastewater flow is detected containing persistent organic pollutant wastewater through liquid meter in described water pipe, wastewater flow is controlled containing persistent organic pollutant wastewater through liquid valve in described water pipe, described water pipe end is connected to reaction tower upper end water inlet containing persistent organic pollutant wastewater through water pipe, described reaction tower is provided with containing persistent organic pollutant wastewater water inlet, waste water is processed into reuse water through reaction tower, exported through water pipe by reaction tower lower end water outlet, low-temperature oxygen plasma is in reaction tower lower end air intake nozzle that place connects input reaction tower, residue oxygen plasma gas after low-temperature oxygen plasma process waste water, is transported to residue oxygen plasma eliminator air intake through air outlet, reaction tower upper end, described residue oxygen plasma eliminator is connected to air outlet, reaction tower upper end, enters in air through residue oxygen plasma eliminator air outlet, described reuse water water pipe is connected to reaction tower lower end water outlet, described reuse water water pipe is provided with under meter, valve body and COD Quick testing instrument, described high-frequency and high-voltage power supply exports high-frequency high-voltage through cable supply low-temperature oxygen plasma generator, described power regulator exports control signal through cable transfer to high-frequency and high-voltage power supply signal input part, the unstripped gas oxygen of described low-temperature oxygen plasma generator is through gas pipe line input low-temperature oxygen plasma generator air intake, connecting gas transmission pipe road, described low-temperature oxygen plasma generator air outlet, the gas pipe line of described low-temperature oxygen plasma generator is equipped with valve body and under meter, described low-temperature oxygen plasma is transported to reaction tower through reaction tower lower end air intake nozzle that place connects, connecting gas transmission pipe road, air outlet, described reaction tower upper end, described residue oxygen plasma eliminator air intake is connected to the gas pipe line of air outlet, reaction tower upper end, described residue oxygen plasma eliminator air outlet connecting gas transmission pipe evacuating pipeline.
In described depth degradation waste water, Persistent organic pollutants are compound and the organic cyanide such as polycyclic aromatic hydrocarbons, heterocyclic, chlorinated aromatic, phenol and cresols class, nitrogen base, organic synthesis polymer;
Described power regulator regulation and control low-temperature oxygen plasma generator exports low-temperature oxygen plasma concentration;
The discharging gap of described low-temperature oxygen plasma generator is 0.05mm ~ 0.2mm;
Described reaction tower height is >=4m;
The described persistent organic pollutant wastewater that contains injects from reaction tower upper end water inlet, and the reuse water formed after process exports from reaction tower lower end water outlet;
Described low-temperature oxygen plasma gas injects from reaction tower lower end nozzle that air intake connects, and residue low-temperature oxygen plasma exports from air outlet, reaction tower upper end;
In described low-temperature oxygen plasma depth degradation waste water after Persistent organic pollutants reaction residue low-temperature oxygen plasma to be reduced into oxygen through residue oxygen plasma eliminator emptying;
In described low-temperature oxygen plasma depth degradation waste water, Persistent organic pollutants temperature of reaction controls at 5 DEG C ~ 40 DEG C;
In described low-temperature oxygen plasma depth degradation waste water, the Persistent organic pollutants reaction times is 6s ~ 2min.
The present invention will containing persistent organic pollutant wastewater by reaction tower reaction process, low-temperature oxygen plasma becomes reuse water wastewater treatment, treatment time be only several seconds ~ tens of second, only just be processed into reuse water containing persistent organic pollutant wastewater with a reaction tower and a low-temperature oxygen plasma generator, thus reduce equipment one-time investment and running cost.
The reaction rate constant (10 of Persistent organic pollutants method in low-temperature oxygen plasma depth degradation waste water of the present invention
8l/mols ~ 10
9l/mols) exceed 7 ~ 8 orders of magnitude than prior art, treatment time of depth degradation Persistent organic pollutants be several seconds ~ tens of second; The present invention need not add initiator, catalyzer will be processed into reuse water (COD≤50mg/L) containing persistent organic pollutant wastewater, contributes to alleviating shortage of water resources predicament.The present invention does not produce other secondary pollutant, to zero environmental.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Accompanying drawing is present system structure iron.
In figure: 1 waste water primary treatment system; 2 water pumps; 3COD Quick testing instrument; 4 liquid valves; 5 liquid meters; 6 reaction towers; 7 nozzles; 8 low-temperature oxygen plasma generators; 9 high-frequency and high-voltage power supplies; 10 low-temperature oxygen plasma concentration on-line detectors; 11 power regulation devices; 12 residue oxygen plasma eliminators; 13 water pipes; 14 gas pipe lines; 15 cables; 16 gas meters; 17 gas traps.
Embodiment
Embodiments of the invention are described in detail below in conjunction with accompanying drawing:
In low-temperature oxygen plasma depth degradation waste water of the present invention, Persistent organic pollutants system architecture as shown in the figure, comprises a low-temperature oxygen plasma generator 8, high-frequency and high-voltage power supply 9, power regulation device 11, low-temperature oxygen plasma concentration on-line detector 10, reaction tower 6, two COD Quick testing instruments 3, residue oxygen plasma eliminator 12, water pump 2, waste water primary treatment system 1, two liquid valves 4, two liquid meters 5, gas trap 17, gas meter 16 etc.
To be processed into through waste water primary treatment system 1 containing organic pollutant wastewater and to connect water pump 2 inlet end containing persistent organic pollutant wastewater through water pipe 13 end, after being transported to reaction tower 6 upper end water inlet, inject reaction tower 6; Water pipe 13 is equipped with online COD Quick testing instrument to detect in water pipe containing persistent organic pollutant wastewater COD concentration; Wastewater flow is detected containing persistent organic pollutant wastewater through liquid meter 5 in water pipe 13; Water pipe 13 end is containing persistent organic pollutant wastewater through water pipe 13 ligation tower 6 upper end water inlet; Reaction tower 6 is provided with containing persistent organic pollutant wastewater water inlet, reuse water is processed into through reaction tower 6 containing persistent organic pollutant wastewater, reaction tower 6 lower end water outlet exports through water pipe 13, low-temperature oxygen plasma is in reaction tower 6 lower end air intake input reaction tower 6, and the residue oxygen plasma gas after low-temperature oxygen plasma process waste water is transported to residue oxygen plasma eliminator 12 air intake through air outlet, reaction tower 6 upper end; Residue oxygen plasma eliminator 12 is connected to air outlet, reaction tower 6 upper end, enters in air through residue oxygen plasma eliminator 12 air outlet; Reuse water water pipe 13 is connected to reaction tower 6 lower end water outlet; Reuse water water pipe 13 is provided with liquid meter 5, liquid valve 4 and COD Quick testing instrument 3; High-frequency and high-voltage power supply 9 exports high-frequency high-voltage and supplies low-temperature oxygen plasma generator 8 through cable 15, and power regulator 11 exports control signal and is transported to high-frequency and high-voltage power supply 9 signal input part through cable 15; The unstripped gas O of low-temperature oxygen plasma generator 8
2low-temperature oxygen plasma generator 8 air intake is inputted through gas pipe line 14; Connecting gas transmission pipe road, low-temperature oxygen plasma generator 8 air outlet 14; The gas pipe line of low-temperature oxygen plasma generator 8 is equipped with gas meter 16 and gas trap 17; Low-temperature oxygen plasma is transported in reaction tower 6 through reaction tower 6 lower end air intake; Connecting gas transmission pipe road, air outlet, reaction tower 6 upper end; Residue oxygen plasma eliminator 12 air intake is connected to the gas pipe line 14 of residue oxygen plasma; Residue connecting gas transmission pipe road 14, oxygen plasma eliminator 12 air outlet is emptying.
Adopt the method for Persistent organic pollutants in drawing system degrading waste water: after the process of waste water primary treatment system 1, waste water connects water pipe 13 being transported in reaction tower 6 upper end water inlet injection reaction tower 6 containing persistent organic pollutant wastewater through the water outlet of water pump 2, inject wastewater flow liquid meter 5 to measure, then control wastewater flow with liquid valve 4, high-frequency and high-voltage power supply 9 exports high-frequency high-voltage and accesses low-temperature oxygen plasma generator 8 through cable 15, the low-temperature oxygen plasma concentration that low-temperature oxygen plasma generator 8 generates reaches 240mg/L, passing into reaction tower 6 lower end air intake through gas pipe line 14 enters in reaction tower 6, again in reaction tower 6 lower end air intake place connect nozzle 7 and be injected into small low-temperature oxygen plasma bubble, low-temperature oxygen plasma and reaction tower 6 include persistent organic pollutant wastewater and react rear remaining oxygen plasma from connecting gas transmission pipe road, air outlet, reaction tower 6 upper end 14, it connects residue oxygen plasma eliminator 12 air intake again, after residue oxygen plasma is reduced into oxygen in residue oxygen plasma eliminator 12, gas pipe line 14 again through connecting residue oxygen plasma eliminator 12 air outlet is emptying, in reaction tower 6, after low-temperature oxygen plasma degraded, waste water exports from reaction tower 6 lower end water outlet, and water outlet stressed joint water pipe 13 exports, and adopts the on-line testing of COD Quick testing instrument 3 to arrange COD concentration in water pipe 13 waste water outward.
Adopt the method for drawing system degraded Persistent organic pollutants: process wastewater flow rate is 80L/h, and Organic Pollutants in Wastewater COD concentration is 1800mg/L, and COD concentration reduces to 148.4mg/L in waste water primary treatment system processed waste water, and temperature is 20.6 DEG C.The low-temperature oxygen plasma concentration adding reaction tower is 240mg/L, and used water difficult to degradate COD concentration after low-temperature oxygen plasma process is down to 27.6mg/L, and after degradation treatment, waste water becomes reuse water (≤50mg/L).
Claims (8)
1. a Persistent organic pollutants system in low-temperature oxygen plasma depth degradation waste water, is characterized in that this system comprises waste water primary treatment system, reaction tower, low-temperature oxygen plasma generator, high-frequency and high-voltage power supply, low-temperature oxygen plasma concentration on-line detector, power regulation device, water pump, pipeline, COD Quick testing instrument, liquid valve, liquid meter, gas trap, gas meter, residue oxygen plasma eliminator;
The described organic pollutant wastewater that contains is processed into containing persistent organic pollutant wastewater through waste water primary treatment system, connects pump entrance end, inject reaction tower after being transported to reaction tower upper end water inlet through water pipe end;
Described water pipe is equipped with online COD Quick testing instrument, detects in water pipe containing persistent organic pollutant wastewater COD concentration;
Detect wastewater flow containing persistent organic pollutant wastewater through liquid meter in described water pipe, control wastewater flow through liquid valve;
Described water pipe end is containing persistent organic pollutant wastewater through water pipe ligation tower upper end water inlet;
Described reaction tower is provided with containing persistent organic pollutant wastewater water inlet, and waste water is processed into reuse water through reaction tower, is exported through water pipe by reaction tower lower end water outlet;
Described low-temperature oxygen plasma is in reaction tower lower end air intake nozzle that place connects input reaction tower, and the residue oxygen plasma gas after low-temperature oxygen plasma process waste water, is transported to residue oxygen plasma eliminator air intake through air outlet, reaction tower upper end;
Described residue oxygen plasma eliminator is connected to air outlet, reaction tower upper end, enters in air through residue oxygen plasma eliminator air outlet;
Described reuse water water pipe is connected to reaction tower lower end water outlet, and reuse water water pipe is provided with under meter, valve body and COD Quick testing instrument;
Described high-frequency and high-voltage power supply exports high-frequency high-voltage through cable supply low-temperature oxygen plasma generator, and power regulator exports control signal through cable transfer to high-frequency and high-voltage power supply signal input part;
The unstripped gas oxygen of described low-temperature oxygen plasma generator is through gas pipe line input low-temperature oxygen plasma generator air intake;
The connecting gas transmission pipe road, air outlet of described low-temperature oxygen plasma generator, its gas pipe line is equipped with valve body and under meter, low-temperature oxygen plasma generator is transported to reaction tower through reaction tower lower end air intake nozzle that place connects, and residue low-temperature oxygen plasma exports from air outlet, reaction tower upper end;
Connecting gas transmission pipe road, air outlet, described reaction tower upper end;
Described residue oxygen plasma eliminator air intake is connected to the gas pipe line of air outlet, reaction tower upper end, air outlet connecting gas transmission pipe evacuating pipeline.
2. require Persistent organic pollutants system in a kind of low-temperature oxygen plasma depth degradation waste water described in 1, it is characterized in that the discharging gap of described low-temperature oxygen plasma generator is 0.05mm ~ 0.2mm.
3. Persistent organic pollutants system in a kind of low-temperature oxygen plasma depth degradation waste water according to claim 1 and 2, is characterized in that described reaction tower height is >=4m.
4. Persistent organic pollutants system in a kind of low-temperature oxygen plasma depth degradation waste water according to claim 1 and 2, is characterized in that in described low-temperature oxygen plasma depth degradation waste water, Persistent organic pollutants temperature of reaction controls at 5 DEG C ~ 40 DEG C; In described low-temperature oxygen plasma depth degradation waste water, the Persistent organic pollutants reaction times is 6s ~ 2min.
5. Persistent organic pollutants system in a kind of low-temperature oxygen plasma depth degradation waste water according to claim 3, is characterized in that described power regulator regulation and control low-temperature oxygen plasma generator exports low-temperature oxygen plasma concentration.
6. Persistent organic pollutants system in a kind of low-temperature oxygen plasma depth degradation waste water according to claim 1,2 or 5, it is characterized in that described after primary treatment in waste water containing Persistent organic pollutants be compound and the organic cyanide such as polycyclic aromatic hydrocarbons, heterocyclic, chlorinated aromatic, phenol and cresols class, nitrogen base, organic synthesis polymer.
7. Persistent organic pollutants system in a kind of low-temperature oxygen plasma depth degradation waste water according to claim 3, it is characterized in that described after primary treatment in waste water containing Persistent organic pollutants be compound and the organic cyanide such as polycyclic aromatic hydrocarbons, heterocyclic, chlorinated aromatic, phenol and cresols class, nitrogen base, organic synthesis polymer.
8. Persistent organic pollutants system in a kind of low-temperature oxygen plasma depth degradation waste water according to claim 4, it is characterized in that described after primary treatment in waste water containing Persistent organic pollutants be compound and the organic cyanide such as polycyclic aromatic hydrocarbons, heterocyclic, chlorinated aromatic, phenol and cresols class, nitrogen base, organic synthesis polymer.
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| CN103910426A (en) * | 2014-01-28 | 2014-07-09 | 大连海事大学 | Drinking water disinfecting and purifying plant used for centralized water supply in residential area |
| CN104341037A (en) * | 2014-11-14 | 2015-02-11 | 厦门大学 | Method and device for removing algal toxin in water by hydroxyl radical |
| CN104355389A (en) * | 2014-11-14 | 2015-02-18 | 厦门大学 | Method and device for removing insoluble organic matters in water |
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2015
- 2015-07-04 CN CN201510392162.9A patent/CN105084618A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001149918A (en) * | 1999-11-30 | 2001-06-05 | Japan Organo Co Ltd | Treating apparatus of wastewater including volatile organic substance and treating method thereof |
| JP2010523327A (en) * | 2007-04-11 | 2010-07-15 | ボリソビッチ ザイカ，アレキサンドル | Method of treating water and aqueous solution by gas discharge plasma and apparatus for performing the same |
| CN102689974A (en) * | 2010-11-20 | 2012-09-26 | 大连海事大学 | Device for treating sewage by using reactive oxygen species |
| CN102688669A (en) * | 2012-05-28 | 2012-09-26 | 广州广一大气治理工程有限公司 | Waste gas purification plant with integration of plasma and biological method |
| CN103910426A (en) * | 2014-01-28 | 2014-07-09 | 大连海事大学 | Drinking water disinfecting and purifying plant used for centralized water supply in residential area |
| CN104341037A (en) * | 2014-11-14 | 2015-02-11 | 厦门大学 | Method and device for removing algal toxin in water by hydroxyl radical |
| CN104355389A (en) * | 2014-11-14 | 2015-02-18 | 厦门大学 | Method and device for removing insoluble organic matters in water |
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