CN110357200A - Array gas-liquid discharge device and method for multistage treatment of organic matters in water - Google Patents
Array gas-liquid discharge device and method for multistage treatment of organic matters in water Download PDFInfo
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- CN110357200A CN110357200A CN201910646290.XA CN201910646290A CN110357200A CN 110357200 A CN110357200 A CN 110357200A CN 201910646290 A CN201910646290 A CN 201910646290A CN 110357200 A CN110357200 A CN 110357200A
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- 239000007788 liquid Substances 0.000 title claims abstract description 66
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000010453 quartz Substances 0.000 claims description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 24
- 239000002957 persistent organic pollutant Substances 0.000 claims description 20
- 239000002184 metal Substances 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 16
- 239000000126 substance Substances 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 10
- 239000003708 ampul Substances 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 239000011889 copper foil Substances 0.000 claims description 4
- 150000002500 ions Chemical class 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
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- 230000008901 benefit Effects 0.000 abstract description 2
- 208000028659 discharge Diseases 0.000 description 53
- 239000007789 gas Substances 0.000 description 43
- 230000015556 catabolic process Effects 0.000 description 12
- 238000006731 degradation reaction Methods 0.000 description 11
- 238000007599 discharging Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
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- 241000894006 Bacteria Species 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/40—Liquid flow rate
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention relates to an array gas-liquid discharge device and method for multistage treatment of organic matters in water. The processing method comprises the following steps: 1) adjusting process parameters; 2) firstly introducing working gas, then introducing a treated liquid sample, and then starting a high-voltage nanosecond pulse power supply; 3) the sample flows through each discharge unit in sequence, and flows out from the sample outlet after being processed step by step for multiple times; 4) and (4) closing the high-voltage power supply, stopping introducing the liquid sample, closing the mass flow controller and stopping introducing the gas. The advantages are that: 1. the hollow high-voltage electrode is filled with gas, so that mass transfer of active particles into liquid can be accelerated, and the gas utilization rate is high. 2. The liquid sample flows in a single direction, and is subjected to multi-stage treatment for many times, so that the treatment effect and efficiency are improved. 3. The controllability is strong. Good discharge stability, long-time continuous treatment and wide application range.
Description
Technical field
The present invention is the array gas-liquid discharge equipment and method of a kind of Organic substance in water multistep treatment, belongs to water treatment technology
Field.
Background technique
With quickly propelling for China's modernization construction, water pollution problems becomes increasingly conspicuous, to aquatile safety and the mankind
Health causes to seriously threaten.Organic pollutants processing method has extraction, liquid membrane separating method, chemical oxidization method and micro- at present
Biological decomposition method etc., but all there is certain limitation in these methods, if extraction and liquid membrane separating method treatment effeciency are low, chemical oxygen
Change method is at high cost, easily causes secondary pollution, and microorganism decomposition method is only capable of decomposing certain specific organic matters.
Gas-liquid discharge plasma is a kind of molecule activation technology of rising in recent years, it includes high energy electron, ion,
Excited atom molecule and free radical etc. have very strong chemical activity, can reach with organic pollutants fast reaction
The purpose of degradation.Meanwhile the effects such as strong ultraviolet-visible, shock wave are accompanied by discharge process, these effects can also
To decompose Organic substance in water.Gas-liquid discharge plasma has reactivity high, adaptable, without secondary pollution to dealing with objects
The advantages that, organic contamination degradation aspect has a clear superiority in water.During gas-liquid discharges degradation organic pollutants,
Reactor electrodes structure directly affects discharge mode, active particle concentration and its mass transport process, is the important of influence treatment effect
Factor.
When using gas-liquid discharge plasma degradation organic pollutants, reactor electrodes structure directly affects electric discharge
Mode, active particle concentration and its mass transport process are an important factor for influencing treatment effect.It is applied to organic contamination in water at present
There are two main classes for the gas-liquid discharging structure of object degradation, i.e., the gas-liquid two-phase electric discharge in subsurface gas-liquid two-phase electric discharge and liquid level.
Subsurface gas-liquid discharging structure is mostly bubble form, and electric discharge occurs in a liquid, to can effectively improve the mass transfer of active ion
Efficiency.Processed waste water has stronger corrosivity under normal conditions, and the high-field electrode in water is easily corroded, thus cannot
Long time continuous working.Further, since bubble is very unstable in generation and diffusion process, the stability of electric discharge can not be protected
Card, can reduce its degradation efficiency.Using the device of discharge in water degradation Organic substance in water, such as patent CN 107381723A and CN
Gas-liquid described in 1673102A discharge sewage-treatment plant use underwater spininess plate electrode structure, and by with pin electrode phase
Gas chamber even is passed through gas, generates bubble electric discharge under water.Although improving electric discharge generation etc. by the quantity for increasing pin electrode
The efficiency of gas ions, but bubble electric discharge is unstable, capacity utilization ratio is lower, causes treatment effeciency not high, and pin electrode is located at
In water, corrosion is easily caused.Gas-liquid discharging structure on liquid level generates discharge plasma in the gas phase, and active particle therein passes
After entering liquid further chemical reaction occurs for matter.Needle-water-bound is mostly used using the gas-liquid discharge equipment on liquid level, is discharged
Fixed area is only occurred in, processing region is small and uneven.In addition, electric discharge mostly use gas chamber air inlet or in open space into
Row, the active particle free diffusing for generation of discharging, mass transfer enters the low efficiency in water, so as to cause the reduction of degradation efficiency.Such as
Patent CN 102190352A proposes a kind of gas-liquid high pressure pulse discharge device, uses multistylus electrode as high-field electrode, leads to
The plasma mass transfer for crossing gas phase discharges generation, which enters to react in water with organic matter, degrades, and the use of spininess structure can increase
Processing area；Inside reactor designs the oxidisability particle and pollutant that can make to generate so that the direction of Liquid Flow is fixed
Time of contact increases, and improves the transformation efficiency of reactor, but continues to be passed through gas into reactor in reaction process, and gas disappears
Consumption is big.102329033 A of patent CN proposes a kind of independent aeration pulse gas-liquid discharge equipment for water process.The device
Using porous titanium-base as high-field electrode, the mass-transfer efficiency of active particle can be improved, promote organic pollutant degradation, and can
Effectively to avoid corroding, but deposit the disadvantages of Fabrication Technology of Electrode is complicated, gas consumption is big, at high cost.
Summary of the invention
Proposed by the present invention is a kind of array gas-liquid discharge equipment of Organic substance in water multistep treatment, and its object is to be directed to
The gas-liquid discharge equipment in water is unable to long time continuous working and guarantees stability, the gas-liquid two-phase of ullage in the prior art
The defects such as electric discharge device processing region is small and uneven, and the big degradation efficiency of gas consumption is low devise a kind of using hollow metal
Electrode is handled as the array gas-liquid discharge equipment of high-field electrode for organic pollutants.Using linearly aligned array
Formula electrode structure, while making liquid directed flow processed, the multiple multistep treatment of liquid may be implemented, and electric discharge at different levels is single
Member processing can form coupling effect, promote treatment effect and efficiency.
Technical solution of the invention: a kind of array gas-liquid discharge equipment of Organic substance in water multistep treatment, including etc.
Plasma reactor, air distribution system and high voltage power supply, the plasma reactor are array structure, including air inlet, hollow
Metal electrode, gas outlet, horizontal quartz tube, outlet, ground electrode, fluid sample, heating region, rubber stopper, injection port,
The plasma reactor generally sealing state, the external ground electrode of horizontal quartz tube, horizontal quartz tube one end are air inlet,
The other end is outlet, is all sealed by rubber stopper, and multiple vertical quartz ampoules, the multiple vertical stone are welded on horizontal quartz tube
English Guan Zhongyi are gas outlet, are sealed by rubber stopper, other are discharge cell, and each discharge cell connects hollow metal electrode,
Hollow metal electrode is equipped with discharge cell air inlet, and hollow metal electrode connects high voltage power supply and mass flow controller.
The high voltage power supply is nanosecond pulse power supply.
The vertical quartz ampoule has 8.
Each discharge cell includes a hollow metal electrode, is fixed in vertical quartz ampoule by rubber stopper,
Electrode is adjustable for 5~10mm at a distance from liquid level, and hollow metal electrode is connected with high voltage power supply and mass flow controller, work
Make gas to be passed through by high-field electrode, by mass flow controller regulating gas flow velocity.
The ground electrode is made of copper foil, is in close contact with horizontal quartz pipe outer wall.
Its processing method, includes the following steps:
1) high voltage power supply parameter, working gas type are adjusted according to the type of organic pollutant in treated sample and concentration
With flow, flow rate of liquid and put single unit number；
2) it is first passed through working gas, then passes to fluid sample processed, is then turned on high voltage nanosecond pulse power supply, generation is put
Electricity；
3) treated sample enters reactor by injection port 12 by peristaltic pump, and along the direction one-way flow of discharge cell
It is dynamic, each discharge cell is flowed successively through, after multiple stepwise disposal, from 7 outflow reactor of outlet；
4) when stopping working, high voltage power supply is first closed, then stops being passed through fluid sample, finally closes mass flow control
Device, stopping are passed through gas.
The step 1) is according to organic pollutant adjustment high voltage power supply parameter, working gas type and stream in treated sample
Amount and puts single unit number at flow rate of liquid, and working gas flow is 30~200mL/min, and liquid sample flow rate is 500~
1500mL/min when liquid sample flow rate increases, improves supply voltage amplitude or frequency, increases gas flow rate, it is single to increase electric discharge
First number；When liquid sample flow rate reduces, supply voltage or frequency are reduced, reduces gas flow rate.
Beneficial effects of the present invention:
1. the present invention is discharged using hollow high-field electrode, working gas can be passed through from hollow electrode, and air-flow can add
Fast active particle mass transfer into liquid, gas effciency is high, and can significantly degrade gas consumption, save the cost.
2. being passed through gas by high-field electrode can be improved the utilization efficiency of gas, can reach under lesser gas flow
Gas consumption, save the cost is greatly lowered in good effect.
It, can be multiple in multiple discharge cells composition linear array configuration 3. fluid sample is in one-way flow state
Multistep treatment, each discharge cell processing can also form coupling effect, improve the effect and efficiency of processing.
4. the Modulatory character of the device is strong, can be according to different process objects, while adjusting gas flow rate and fluid sample
Flow velocity can also flexibly change discharge cell quantity, achieve the purpose that efficient process.
5. electric discharge is carried out in ullage, the stability of electric discharge ensure that, high-field electrode and ground electrode be not straight with liquid
Contact, effectively prevents high-field electrode and is corroded, can long-time continuous processing.
6. the device is handled in addition to being suitable for organic pollutants, it may also be used for bacteria inactivation rate in water.
Detailed description of the invention
Attached drawing 1 is a kind of array gas-liquid discharge equipment schematic diagram of Organic substance in water multistep treatment.
Attached drawing 2 is discharge cell structural schematic diagram.
1- high voltage power supply in figure, 2- mass flow controller, 3- air inlet, 4- hollow metal electrode, the gas outlet 5-, 6- water
Flat quartz ampoule, 7- outlet, 8- ground electrode, 9- fluid sample, the heating region 10-, 11- rubber stopper, 12- injection port, 13-
Vertical quartz ampoule.
Specific embodiment
Further explanation of the technical solution of the present invention with reference to the accompanying drawing
As shown in Figure 1, a kind of array gas-liquid discharge equipment of Organic substance in water multistep treatment, main includes driving electric discharge
Nanosecond pulse power supply 1, the mass flow controller 2 of the flow velocity of working gas is controlled, for being passed through the air inlet of working gas
3, the hollow high-field electrode 4 being made of stainless steel, for the gas outlet 5 of gas to be discharged, outlet 7 is made and solid of copper foil
It is scheduled on the ground electrode 8 in the outside of horizontal quartz bottom of the tube, the fluid sample processed 9 of flowing, plasma discharging body region 10, rubber
Rubber plug 11, injection port 12.
Reactor is welded on a horizontal quartz tube by 8 vertical quartz ampoules, and whole device is in opposing seal state,
Wherein 7 vertical quartz ampoules are discharge cell, and 1 is gas outlet, and the structure of each discharge cell is as shown in Fig. 2, include one
Hollow metal electrode is fixed in vertical quartz ampoule 13 by rubber stopper, and electrode can between 5~10mm at a distance from liquid level
It adjusts, hollow metal electrode is connected with high voltage power supply and mass flow control, and working gas is passed through by high-field electrode, by quality stream
Amount controller regulating gas flow velocity.Ground electrode is made of copper foil, is in close contact with 6 outer wall of horizontal quartz tube.
When handling organic pollutants, treated sample enters reactor, and edge by 12 injection ports by peristaltic pump
The direction one-way flow of discharge cell, flows successively through each discharge cell, anti-from the outflow of 7 outlets after multiple stepwise disposal
Answer device.
The present apparatus can be driven using AC power source, can also be driven using nanosecond pulse power supply.In comparison, same
Under the power condition of sample, nanosecond pulse power supply drives the efficiency of discharge treatment organic pollutants higher than alternating current discharge.
When high-field electrode applies voltage, the gas being passed through by electrode is breakdown, discharges, in liquid level and high-field electrode
Between generate plasma, the strong oxidizing properties activity grain such as hydroxyl radical free radical, oxygen atom, hydrogen peroxide, ozone in plasma
Son accelerates the mass transfer into liquid under the action of air-flow, and further chemical reaction occurs in water.While the purple for generation of discharging
Outer light, shock wave etc. can cause hydrone dissociation to generate hydroxyl radical free radical, can also promote the degradation of Organic substance in water.
The present embodiment can dynamically adjust high voltage power supply parameter, work according to the concentration of organic pollutant in treated sample
Gaseous species and flow, flow rate of liquid and put the parameters such as single unit number.Working gas flow is generally in 30~200mL/min model
Enclose interior adjusting, and liquid sample flow rate is in 500~1500mL/min, specifically, when liquid sample flow rate is larger, Ying Zeng great
Supply voltage or frequency improve gas flow rate, increase discharge cell number；It can suitably be reduced when liquid sample flow rate is smaller
Supply voltage or frequency reduce gas flow rate.
Apparatus of the present invention should first be passed through working gas before work, then pass to fluid sample processed, be then turned on high pressure
Nanosecond pulse power supply generates electric discharge.When stopping working, high voltage nanosecond pulse power supply should be first closed, then stops being passed through liquid-like
Product, finally close mass flow controller, and stopping is passed through gas.
Claims (7)
1. a kind of array gas-liquid discharge equipment of Organic substance in water multistep treatment, it is characterized in that including plasma reactor, matching
Gas system and high voltage power supply (1)；The air distribution system includes mass flow controller (2)；The plasma reactor is battle array
Array structure is made of six discharge cells, and each discharge cell includes air inlet (3), hollow metal electrode (4), gas outlet
(5), horizontal quartz tube (6), outlet (7), ground electrode (8), heating region (10), rubber stopper (11), injection port (12),
The plasma reactor generally sealing state, horizontal quartz tube (6) external ground electrode (8), horizontal quartz tube (6) one end
For injection port (12), the other end is outlet (7), is all sealed by rubber stopper, multiple vertical stones are welded on horizontal quartz tube (6)
English pipe (13), one is gas outlet (5) in the multiple vertical quartz ampoule, is sealed by rubber stopper, other are discharge cell, each
Discharge cell connects hollow metal electrode (4), and hollow metal electrode (4) is equipped with air inlet (3), and hollow metal electrode (4) is even
Connect high voltage power supply (1) and mass flow controller (2).
2. the array gas-liquid discharge equipment of organic pollutants multistep treatment according to claim 1, it is characterized in that
The high voltage power supply (1) is nanosecond pulse power supply.
3. the array gas-liquid discharge equipment of organic pollutants multistep treatment according to claim 1, it is characterized in that
The vertical quartz ampoule (13) has 8.
4. the array gas-liquid discharge equipment of organic pollutants multistep treatment according to claim 1, it is characterized in that
Each discharge cell includes a hollow metal electrode, is fixed in vertical quartz ampoule by rubber stopper, electrode and liquid level
Distance be 5~10mm, hollow metal electrode is connected with high voltage power supply and mass flow controller, and working gas is by high-voltage electricity
Pole is passed through, by mass flow controller regulating gas flow velocity.
5. the array gas-liquid discharge equipment of organic pollutants multistep treatment according to claim 1, it is characterized in that
The ground electrode (8) is made of copper foil, is in close contact with horizontal quartz tube (6) outer wall.
6. a kind of array gas-liquid discharge equipment of Organic substance in water multistep treatment as described in claim 1, it is characterized in that: using
The method that the array gas-liquid discharge equipment of the organic pollutants multistep treatment carries out organic pollutants processing includes
Following steps:
1) according to organic pollutant category in treated sample and concentration adjustment high voltage power supply parameter, working gas type and stream
Amount, flow rate of liquid and discharge cell number；
2) it is first passed through working gas, then passes to fluid sample processed, is then turned on high voltage nanosecond pulse power supply, generates electric discharge etc.
Gas ions；
3) treated sample enters reactor by injection port (12) by peristaltic pump, and along the direction one-way flow of discharge cell,
Each discharge cell is flowed successively through, after multiple stepwise disposal, from 7 outflow reactor of outlet；
4) when stopping working, high voltage power supply is first closed, then stops being passed through fluid sample, mass flow controller is finally closed, stops
Only it is passed through gas.
7. the array gas-liquid discharge equipment of organic pollutants multistep treatment according to claim 6, it is characterized in that
Step 1) the working gas flow is 30~200mL/min, and the liquid sample flow rate is 500~1500mL/min,
When liquid sample flow rate increases, supply voltage amplitude or frequency can be improved, increase gas flow rate, increase discharge cell number；
When liquid sample flow rate reduces, supply voltage or frequency can be reduced, reduces gas flow rate.
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| CN201910646290.XA CN110357200A (en) | 2019-07-17 | 2019-07-17 | Array gas-liquid discharge device and method for multistage treatment of organic matters in water |
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Cited By (3)
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| CN110831312A (en) * | 2019-11-07 | 2020-02-21 | 大连理工大学 | Efficient plasma gas-liquid discharge system |
| CN115332518A (en) * | 2022-08-31 | 2022-11-11 | 华南理工大学 | Quantum dot tin oxide loaded multi-walled carbon nanotube composite material and preparation method and application thereof |
| CN116081777A (en) * | 2023-02-13 | 2023-05-09 | 哈尔滨工业大学 | Plasma active water preparation device |
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| CN116081777B (en) * | 2023-02-13 | 2024-05-24 | 哈尔滨工业大学 | Plasma active water preparation device |
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Application publication date: 20191022 |