CN103496761B - Plasma body and ultrasonic combined water treatment device and technical process thereof - Google Patents
Plasma body and ultrasonic combined water treatment device and technical process thereof Download PDFInfo
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- CN103496761B CN103496761B CN201310408153.5A CN201310408153A CN103496761B CN 103496761 B CN103496761 B CN 103496761B CN 201310408153 A CN201310408153 A CN 201310408153A CN 103496761 B CN103496761 B CN 103496761B
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Abstract
The present invention relates to technical field of waste water processing, particularly plasma body and ultrasonic combined water-treatment technology field.A kind of plasma body and ultrasonic combined water treatment device, comprise atomizing nozzle, dielectric barrier discharge reactor, ozone collection tower, box reactor, high-voltage pulse power source, ultrasonic-frequency power supply, data gathering and control unit and power supply unit; Described dielectric barrier discharge reactor is connected with described high-voltage pulse power source, the top of described dielectric barrier discharge reactor is provided with atomizing nozzle, lower end and described ozone are collected tower and are connected, the below that described ozone collects tower is provided with ultraviolet lamp and described box reactor, PZT (piezoelectric transducer) and aerating apparatus are equipped with in the bottom of described box reactor, described PZT (piezoelectric transducer) is connected with described ultrasonic-frequency power supply, described power supply unit comprises photovoltaic and civil power combines power supply, and described data gathering and control unit control described every other functional unit.
Description
Technical field
The present invention relates to technical field of waste water processing, particularly plasma body and ultrasonic combined water-treatment technology field.
Background technology
Along with environmental pollution is day by day serious, the enhancing of people's environmental consciousness, higher to the requirement of discharge of wastewater, existing water treating equipment can not meet the emission standard and processing efficiency that day by day improve.CN102344217A discloses a kind of plasma body and ultrasonic integrated sewage treatment unit, by the High Temperature High Pressure of ultrasonic technology and the technology such as the high-energy electron of plasma body that the corona discharge of the features such as the shock wave of accompanied by intense and power technology is formed bombards, ozonize, ultraviolet photolysis combine, comprehensive treating process sewage, to the organic wastewater successful of high-concentration hardly-degradable.CN102583697A discloses a kind of dielectric barrier discharge water treatment device and treatment process thereof, uses high voltage high frequency bursts power drives, the liquid-gas interface electric discharge between dielectric barrier electrode and suspension electrode, and uses the active particle process water that electric discharge produces.But the electrical discharge zone of these two patents is positioned at the air-shed above liquid, the active particle life cycle produced owing to discharging is very short, and fully can not contact with pending water, its treatment effect is subject to extreme influence.The master thesis " experimental study of pulsed plasma process waste water " that height enters proposes a kind of experimental installation being atomized discharge reactor process waste water, use the water after atomization along the axial flow of electrode permutation, and use the active particle process water produced that to discharge between electrode permutation.But the water smoke due to the program is not pass perpendicularly through discharge arrays face, and part water smoke passes from the outside of electrical discharge zone, reduces treatment effect.And the equal energy consumption of above scheme is large, running cost is high, and do not make full use of the degradation function of plasma body.Therefore, water treating equipment and the technique of developing a kind of high-efficiency cleaning using clean energy, speed of reaction fast are necessary.
Summary of the invention
For solving the deficiencies in the prior art, the object of the present invention is to provide a kind of use clean energy, speed of reaction fast plasma body and ultrasonic combined water treatment device and technical process thereof.
In order to realize above-mentioned target, the present invention adopts following technical scheme:
A kind of plasma body and ultrasonic combined water treatment device, comprise atomizing nozzle, dielectric barrier discharge reactor, ozone collection tower, ultraviolet lamp, box reactor, high-voltage pulse power source, ultrasonic-frequency power supply, data gathering and control unit and power supply unit; Described dielectric barrier discharge reactor is connected with described high-voltage pulse power source, the top of described dielectric barrier discharge reactor is provided with atomizing nozzle, lower end and described ozone are collected tower and are connected, the below that described ozone collects tower is provided with described box reactor, PZT (piezoelectric transducer) and aerating apparatus are equipped with in the bottom of described box reactor, described PZT (piezoelectric transducer) is connected with described ultrasonic-frequency power supply, described power supply unit comprises photovoltaic and civil power combines power supply, and described data gathering and control unit control described every other functional unit.
Comprise filtering basin and water purification torage tank further, described filtering basin are connected with described box reactor, and described water purification torage tank is connected with described filtering basin.
Comprise source of the gas, air pump, gas meter further, described source of the gas, air pump, gas meter and ozone concn detecting unit and described aerating apparatus form gas passage.
Comprise piping system further, described piping system comprises multiple valve member, liquid meter, water level gauge, Water Test Kits and pH value adjustment unit, jointly forms fluid passage.
Above-mentioned arbitrary functional unit is by the same control of described data gathering and control unit.
Described power supply unit is powered to described all functions unit, preferentially adopts photovoltaic power supply by the control of described data gathering and control unit.
Described dielectric barrier discharge reactor comprises a dielectric barrier discharge array, described dielectric barrier discharge array comprises multiple electrode, the quartz glass tube that described electrode is closed by stainless steel stick electrode and one end is formed, described stainless steel stick electrode is inserted in hyaline-quartz pipe, and described high-voltage pulse power source is connected on two adjacent electrodes.
A technical process for plasma body and ultrasonic combined water treatment device, comprises the following steps:
A. source of the gas and pending water enter described atomizing nozzle simultaneously, be converted into jet spray, through described dielectric barrier discharge reactor, start described high-voltage pulse power source, described dielectric barrier discharge reactor produces corona discharge under high-voltage pulse electric source forcing, jet spray is when through electrical discharge zone, and the poisonous and harmful substances in the active particle of electrical discharge zone and water reacts;
B. the water through described dielectric barrier discharge reactor for treatment is collected in described box reactor, the residual ozone that described dielectric barrier discharge reactor exoelectrical reaction produces collects in tower sink and gather in the water surface overhead of described box reactor at ozone, when the water level of described box reactor reaches predetermined height, ozone concn reaches preset value, start described ultrasonic-frequency power supply and ultraviolet lamp, the PZT (piezoelectric transducer) being in described box reactor bottom sends ultrasonic wave, use intensified by ultrasonic wave ozone, collaborative ultraviolet carries out secondary treatment to water;
C. through the water of secondary treatment reach drink or emission standard time, treated water is extracted out from box reactor, injects filtering basin, after filtering impurities in water, send into water purification torage tank;
After secondary treatment water also do not reach drink or emission standard time, start liquid pump and high-voltage pulse power source, water processed through dielectric barrier discharge reactor again; Dielectric barrier discharge reactor has associated treatment and timesharing associated treatment two kinds of patterns simultaneously respectively with ultraviolet lamp and intensified by ultrasonic wave ozone.
When described filtering basin dirt is built up and caused deteriorating water quality in water purification torage tank, the water in water purification torage tank is drawn back box reactor repercussion flushing is carried out to filtering basin.
Usefulness of the present invention is:
By water and air after atomizing nozzle atomization, in dielectric barrier discharge reactor, produce electric discharge, use high-energy electron, ozone (O that electric discharge produces
3), ultraviolet (UV) and living radical group (H, OH, O) directly wrap up tiny drops of water, plays degraded and germicidal action.According to actual treatment demand, through the water of discharge reactor process, can collect in tower at ozone and start ultraviolet lamp and process.
Primary treatment is carried out to water with dielectric barrier discharge plasma in water smoke after, collect the residual ozone that electric discharge produces, use intensified by ultrasonic wave ozone further, secondary circulation process is carried out to water, improves utilization rate of electrical.
Data gathering and control unit are unified controls water treatment technological process, possess that photovoltaic is preferentially powered, automatic sampling, water quality detection, circular treatment, water up to standard discharge, counterflush filtering basin function; There is internal recycling discharge process, internal recycling electric discharge adds supersound process, internal recycling is ultrasonic adds ozonize three kinds of tupes.
Accompanying drawing explanation
Fig. 1 is device schematic flow sheet of the present invention.
Fig. 2 is process flow block diagram of the present invention.
Fig. 3 is data gathering of the present invention and control linkage schematic diagram.
Fig. 4 is dielectric barrier discharge array schematic diagram of the present invention.
Fig. 5 is the box structure of reactor schematic diagram of intensified by ultrasonic wave ozone of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, concrete introduction is done to the present invention.
As shown in Figure 1, described device comprises the unit such as atomizing nozzle, dielectric barrier discharge reactor, ozone collection tower, ultraviolet lamp, box reactor, filtering basin, water purification torage tank, data gathering and control unit, pipeline, valve member, water level detecting, ozone concn detect, gas meter, liquid meter, air pump, liquid pump, high-voltage pulse power source, ultrasonic-frequency power supply, source of the gas, power supply unit, Water Test Kits, pH value adjustment and forms for a kind of plasma body of the present invention and ultrasonic combined water treatment device.Dielectric barrier discharge reactor is connected with high-voltage pulse power source, has quartz window in dielectric barrier discharge reactor side, and its effect is the luminosity spectral characteristic that the probe of spectrograph easy to use observes water smoke exoelectrical reaction region herein.Atomizing nozzle is arranged on about 40 ~ 50cm place above dielectric barrier discharge reactor, and tower is collected by Flange joint ozone in the lower end of dielectric barrier discharge reactor, and box reactor is positioned at ozone and collects below tower.The upper strata space mounting of box inside reactor has ozone concn and condensate tank of dehumidifier, bottom is provided with PZT (piezoelectric transducer) and aerating apparatus, PZT (piezoelectric transducer) is connected with ultrasonic-frequency power supply, and aerating apparatus forms the internal gas circulation passage of box reactor with outside air pump and gas meter.Source of the gas and pending water enter atomizing nozzle simultaneously, are converted into jet spray and with certain speed (0.07 ~ 1.5m/s, maximum be no more than 3m/s) through dielectric barrier discharge reactor.Under the excitation of high-voltage pulse power source, be in the dielectric barrier discharge reactor corona discharge in jet spray and produce active particle (high-energy electron, ozone (O
3), ultraviolet (UV) and living radical group (OH, O)) and to react with the toxic species in water; According to actual treatment needs, open ultraviolet lamp and work alone or work asynchronously with dielectric barrier discharge reactor, through the water smoke of discharge reactor further by ultraviolet lamp process; Discharge the ozone that produces, and the subparticipation treatment reaction of electrical discharge zone, the ozone that reaction is remaining, because its density ratio air is large, (under the normal conditions, density is respectively 2.14kg/m
3and 1.29kg/m
3), collect at ozone the water surface upper strata Spatial Agglomeration sinking to box reactor in tower.When the concentration of ozone reaches the value of setting (0.5 ~ 2.0ppm), start cycle of ozone pump and ultrasonic power, open ultraviolet lamp, the piezoelectric ceramic transducer being in box reactor bottom sends high-frequency ultrasonic, ozone in water generates many tiny bubbles under hyperacoustic effect, these bubbles undergoes rapid expansion bursting in less space, thus cause local to produce high temperature and high energy impact events ripple (this phenomenon is referred to as ultrasound cavitation effect).Water and ozone are under the effect of ultrasound cavitation effect, generate the active substance that hydroxyl, oxyradical and hydrogen peroxide etc. have high oxidation characteristic, these active substances are worked in coordination with ultraviolet and are reacted with poisonous and harmful substances in water in box reactor further, carry out secondary treatment to water.
The effect of Water Test Kits is the multiple parameters such as pH value, redox potential (Oxidation-ReductionPotential:ORP), specific conductivity, salinity, total dissolved solidss (Totaldissolvedsolids:TDS), ionic concn (nitrate, nitrite etc.), chemical oxygen demand (COD) (ChemicalOxygenDemand:COD), ammonia nitrogen, total phosphorus, turbidity, heavy metal element (manganese, lead, mercury, cadmium, sexavalent chrome etc.) before and after detection water is processed; The function of pH value adjustment unit is, before water treatment, water is adjusted to suitable pH value, to improve the effect of plasma body and ultrasonic combined process.At the end of water treatment, the pH value of treated water is adjusted to the value being applicable to drinking or discharging; Gas meter FM2, adopts with pressure compensated orifice-plate flowmeter, low discharge vortex shedding flow meter or V cone flow meter, for measuring the gas flow flowing into atomizing nozzle; Liquid meter FM1 adopts glass rotors or metallic rotameter, jointly forms the liquid circulation flow injected in atomizing nozzle or box reactor control and measurement function with liquid pump M1; Gas meter FM3, adopts glass rotors or metallic rotameter, jointly completes the control and measurement function of cycle of ozone flow with air pump M2; Data gathering and control unit, its function is the action controlling the unit such as power supply unit, high-voltage pulse power source, ultrasonic-frequency power supply, gas (liquid) pump, valve member, pH value adjustment, and takes into account the data such as acquisition stream gauge, ozone concn, water level; Valve member and piping system, under the control of data gathering and control unit, form the various circulation passage meeting processing technological flow; One-way cock VL1, VL2, VR1, VR2, liquid pump M1 and under meter FM1 form traffic organising and the airflow measurement unit of water jointly.Wherein, the control signal homophase of valve VL (R) 1 and VR (L) 2, the control signal of VL (R) 1 and VL (R) 2 is anti-phase.When valve VR1 and VL2 opens (VL1 and VR2 closedown), when liquid pump M1 operates, water flows to C2 from muff joint C1.When valve VL1 and VR2 opens (VR1 and VL2 closedown), when liquid pump M1 operates, water flows to C1 from muff joint C2.
After the present invention makes water fogging, in dielectric barrier discharge reactor, use active particle (high-energy electron, the ozone (O of heating region
3), ultraviolet (UV) and living radical group (OH, O etc.)) directly wrap up tiny drops of water, and react with toxic species in water (organic molecule, heavy metal element, bacterium, spore), generate toxicological harmless material raw, play degraded and germicidal action, the object reaching process and purify waste water; The residual ozone that electric discharge produces collected and use intensified by ultrasonic wave process water, the free radical (OH etc.) using the underwater cavitation effect of ultrasonic wave to produce and shockwave degraded Organic substance in water, reach the object of process water; Ultraviolet lamp uses inductively coupled plasma (InductiveCoupledPlasma:ICP) Non-polarized lamp, its fluorescent tube uses silica glass to make, inner filling mercury vapour and rare gas element, 185.0 and 253.7nm ultraviolet is produced under the electric ballast of external linkage drives, react with water smoke, oxygen molecule, hydrogen peroxide and super hydrogen oxide, further generate active particle and for the treatment of water.Water is carried out being atomized and using ultrasonic cavitation effect, make the contact area of water and active particle exponentially level increase, effectively increase active particle and toxic species dispersal speed.Thus add the formation having swashed chemical anti-collision between active particle and toxic species molecule " meet with to ", add water treatment DeR speed, the final water treatment technological process forming high energy efficiency.
The technical process of a kind of plasma body of the present invention and ultrasonic combined water treatment device is as shown in Figure 1: (1) valve VR1 and VL2 opens, under the effect of liquid pump M1, untreated water flows into through filter F1 and valve V1, start the water quality parameter before Water Test Kits check processing, according to the detected result of Water Test Kits, start the potential of hydrogen that pH value adjustment unit adjusts pending water.Through adjusting the water of potential of hydrogen through under meter FM1, valve V2 and filter F 2, jointly send into atomizing nozzle with compressed gas source.Screwed the motor speed of valve VG and liquid pump M1 by adjustment, make the water-gas ratio of mixture entering atomizing nozzle be in suitable scope (between 1:20 ~ 1:5); (2) water through atomizing nozzle atomization forms jet spray, with suitable speed (0.07 ~ 1.5m/s) through dielectric barrier discharge reactor, start high-voltage pulse power source, make dielectric barrier discharge reactor produce corona discharge in jet spray.Water through dielectric barrier discharge reactor for treatment is collected at box reactor, the residual ozone that exoelectrical reaction produces, and collects tower sink and the upper surface Spatial Agglomeration of water in box reactor at ozone; (3) when the water level in box reactor reaches predetermined height (1/2 ~ 2/3 of internal height), ozone concn reaches preset value (0.5 ~ 2.0ppm), start ultrasonic-frequency power supply, ultraviolet lamp, booster air pump M2, Open valve V5 and V4, startup liquid pump M1, make the water in box reactor and ozone be in recurrent state, and use intensified by ultrasonic wave ozone to process water further.Ozone in box reactor is through constantly circulation, and react with poisonous and harmful substances in water under intensified by ultrasonic wave effect, its concentration constantly declines.When ozone concn is lower than the lower limit (as 0.10ppm) of setting, and when water does not reach discharge index, stop air pump M2 and ultrasonic power supply, valve-off V4, open valve V2, V5, VR1 and VL2, start liquid pump M1, start high-voltage pulse power source, water is processed through water fog medium barrier discharge reactor again.In the process, Water Test Kits and the ozone concn detecting unit ozone concn respectively in the degraded of Real-Time Monitoring water in the situation of poisonous and harmful substances and box reactor.And according to practical situation, make device be in the electric discharge of jet spray jet spray dielectric barrier discharge and intensified by ultrasonic wave ozone timesharing associated treatment water, or jet spray jet spray dielectric barrier discharge discharge and intensified by ultrasonic wave ozone associated treatment two kinds of patterns simultaneously; (4) when treated water reach drink or discharge index time, stop high-voltage pulse power source, ultrasonic power, air pump M2, valve-off V1, V2, V3, V5, V9, V10, VR1 and VL2, open valve V4, V6, V7, VR2 and VL1, start liquid pump M1, treated water is extracted out from box reactor, inject filtering basin, after small-particle impurity in filtering treated water, send into water purification torage tank; (5), during the deteriorating water quality caused in water purification torage tank when dirt in filtering basin is more, need to perform filtering basin counterflush flow process.Its process prescription is, valve-off V1, V2, V3, V5, V6, V7, V8, V10, VL1 and VR2, Open valve V4, V9, VR1 and VL2, start liquid pump M1, water in water purification torage tank to be drawn back in box reactor (now, the water quality parameter in water purification torage tank is detected) by Water Test Kits, again make valve V1, V2, V3, V5, V6, V7, V8, V9, VL2 and VR1 is in closing condition, Open valve V10, V11, VL1 and VR2, start liquid pump M1, by the water in box reactor through valve V10 to filtering basin counterflush, and discharge from valve V11.Relation between the valve member working order of water treatment technological process and treatment process running status is as shown in table 1.
Table 1 system running state and valve numbering state vs show
As shown in Figure 2, all functions unit of the present invention all under data gathering and control unit unified controls, according to pre-set water treatment technological process and time series operation.The output terminal series winding of photovoltaic module has the carrying out surge protection unit of anti-lightning, static discharge, nuclear power pulse all surge voltages such as microwave radiation and electric current.For the environment (as remote mountain areas, island etc.) that electric power cannot arrive, the present invention adopts " from net isolated island " operation scheme, its power supply unit scheme is: the output of photovoltaic module is first connected with surge protective machine, again send into band energy storage from net photovoltaic DC-to-AC converter, photovoltaic energy first charges to energy storage device (store battery), when the energy of store battery is sufficient, jointly carry out stable power-supplying to from net photovoltaic DC-to-AC converter with photovoltaic module; Under the environment having 220V electric main, data gathering and control unit pass through the energy of timely monitor store battery and photovoltaic module, when the energy of store battery and photovoltaic module meets the energy requirement of system cloud gray model, preferential use is with powering from net photovoltaic DC-to-AC converter of energy storage.When the energy of store battery and photovoltaic module can not meet system cloud gray model, automatically switch to the work of 220V civil power; For generating electricity by way of merging two or more grid systems, and provide upper and lower net electricity by the occasion of separately clearing, directly use grid-connected photovoltaic inverter.The electric energy of power supply unit provides respectively to high-voltage pulse power source, ultrasonic-frequency power supply, source of the gas, pH value adjustment unit, Water Test Kits and accessory power supply; The output of accessory power supply is main channel DC24V/5A, from passage DC5V/2A.Power respectively to gas (liquid) pump, valving, sensor group (water level and ozone concentration sensor) and under meter; Gas (liquid) pump, valving, high-voltage pulse power source, ultrasonic-frequency power supply, source of the gas, Water Test Kits, pH value adjustment unit etc., according to technical process and the running status of water treatment system, run according to data gathering and the pre-set program circuit of control unit; Data gathering and control unit according to the data of the program Real-time Collection sensor group, under meter and the Water Test Kits that set, and control correlation function and run according to the water treatment process preset.
The dielectric barrier discharge array of dielectric barrier discharge reactor as shown in Figure 3, the quartz glass tube that every root electrode is closed by stainless steel stick electrode and one end is formed.Quartz glass tube is about 225mm, and stainless steel electrode is about 250mm; Quartz glass tube external diameter 5.00mm, internal diameter 2.00mm, one end is closed, and inner insertion external diameter is the stainless steel electrode of 2.00mm.Electrode with quartz medium pipe lines up two row, the between centers of adjacent two electrodes is set as 7.00 ~ 8.00mm, medium layer spacing is 2.00 ~ 3.00mm, and high-voltage pulse power source is connected on two adjacent electrodes, and the gap between adjacent two medium layers produces electric discharge.Electrode be divided into upper and lower 2 layers parallel staggered, every layer place 20 ~ 30 electrodes, upper and lower two row interelectrode width between centers is about 7.00mm.
Interelectrode minimum arcing distance d, atmospheric pressure p and voltage breakdown V
bbetween follow Paschen (Paschen ' sLaw) law, that is:
A and B in formula is constant, V
bfor voltage breakdown, p is atmospheric pressure, and d is the discharging gap between medium layer, and γ is secondary electron yield.
It is the tiny globule of 10 ~ 500um and the mixture of air that water changes into grain size through atomizing nozzle, and forms jet, passes rapidly through the space between quartz medium layer.Under the excitation of high-voltage pulse power source, be in active particle (high-energy electron, the ozone (O in the electrical discharge zone of silica glass medium layer gap
3), ultraviolet (UV) and free group (OH, O)) fully contact with the toxic species in water and react, play degraded and germicidal action.Owing to using high-voltage pulse power source, part is attached to the water on quartz medium cover surface, can not affect the generation of electric discharge.Meanwhile, the water of these attachments can treat as water discharge electrode to a certain extent, enhances discharge process effect.
Use V
gand V
lrepresent the flow of empty G&W respectively, use S
drepresent electrical discharge zone cross-sectional area, then jet spray through the flow rate expression of the electrical discharge zone of reactor is:
In the present invention, according to the life cycle of hydroxyl radical free radical after high-voltage pulse electric source excitation produces, jet spray is set as 0.07 ~ 1.50m/s through the Peak Flow Rate in exoelectrical reaction district.
Voltage pulse rising and falling time is used to be nanosecond, the high-voltage pulse power source driving medium barrier discharge structure of 20 ~ 30kV.Under the effect of high reduction electric field, the seed electrons that high energy Millikan's rays is excited is accelerated, collide and the chain reaction such as ionization, causes avalanche effect, finally produces corona discharge.Atom in water smoke or the collision between molecule and electronics, collide between atom and atom, and the interaction etc. of light and atom or molecule can ionize, and produces electron-ion pair; Electronics or the ionization water drops surface in water smoke, water decomposition is hydroxyl radical free radical etc. by rayed water drops surface etc.Thus, when there is corona discharge in water smoke, various discharge product can be produced, comprise high-energy electron, positive and negative ion, free radical, ozone (O
3) and ultraviolet, and a small amount of oxynitride (NO
x), a small amount of HNO
3deng.The Strong oxdiative characteristic of the active particle utilizing Water spray discharge to produce (under the condition of pH=7.00, OH, O, O
3, H
2o
2and HO
2oxidizing potential be respectively 2.80V, 2.42V, 2.07V, 1.77V and 1.70V), make the toxic species such as the organic molecule in water, heavy metal element, germ, the reaction such as Strong oxdiative and replacement occur, finally reaches the objects such as degraded, sterilization, sterilization.In water smoke, the mechanism of production of some primary activity particles is as follows:
Water molecules and oxygen molecule Direct Resolution under high-energy electron (3 ~ 10eV) effect:
e+H
2O→e+H+OH(R1)
e+O
2→O(
1D)+O(
1D)+e(R2)
Water molecules be excited state Sauerstoffatom O (
1d) decompose:
O(
1D)+H
2O→2HO(R3)
Nitrogen molecule is excited by high-energy electron, and reacts with oxygen molecule further and generate the Sauerstoffatom of excited state:
The Sauerstoffatom of excited state and nitrogen molecule react and generate nitrogen protoxide NO and nitrogen N free radical, and nitrogen N free radical and hydroxyl OH react bad student's nitrogen protoxide NO and hydroperoxyl radical [18]:
O(
1D)+N
2→NO+N(R6)
N+OH→NO+H(R7)
The Sauerstoffatom O of Water spray discharge heating region and oxygen molecule O
2at the third middle element M (N
2or H
2o), under participating in, react and generate ozone O
3:
O+O
2+M→O
3+M(R8)
The combination reaction generation oxydol H that hydroxyl is right
2o
2:
OH+OH→H
2O
2(R9)
In addition, the water molecules H that the ultraviolet that water smoke corona discharge produces causes
2o and oxygen molecule O
2photodissociation, produce oxygen hydroxy radical qiao OH, hydroperoxyl radical H and Sauerstoffatom O be another important reaction mechanism:
H
2O+hv→OH+H(λ=145-246nm)(R10)
O
2+hv→O+O(
1D)(λ=200-220nm)(R11)
Because Water spray discharge region creates ozone O
3, hydroperoxyl radical H, individual Sauerstoffatom O, reaction formula is respectively (R1), and (R2) and (R8), this will produce oxydol H further
2o
2:
O
3+H
2O→HO
2+O
2(R12)
H+O
2+M→HO
2+M(R13)
O(
1D)+H
2O→HO
2+HO
2→2H
2O
2(R14)
H+HO
2→H
2O
2(R15)
By in the process of water cycle discharge process, reaction product H
2o
2and HO
2(R12 ~ R15), under the action of ultraviolet light in Water spray discharge region, reacts further, generates more hydroxyl radical free radical OH and hydroperoxyl radical H:
HO
2+hv→OH+H(λ=200-250nm)(R16)
H
2O
2+hv→OH+OH(λ=190-350nm)(R17)
As shown in Figure 4, box reactor, is positioned at the below that ozone collects tower.Box reactor, totally in hexahedron structure, uses stainless steel to make.Ultrasonic piezo-transducer is arranged on the bottom of casing, and ozonation aerated device (aeration tube or aerator disk) is arranged on the support of box inside reactor.Instrument panel is installed water level/device such as ozone concn detection, air pump M1, gas meter FM3, cycle of ozone pipeline.PZT (piezoelectric transducer) and the ozone aerator ultrasonic power supply shown in interface chart 1 and air pump M2 respectively.Ozone enters ozone aerator by air pump M2 circulation, overflow from the bottom of box reactor, under the cavatition of ultrasonic transducer, form intensive cavitation bubble, cavitation bubble explosion moment, in short space, produce high heat and shockwave, accelerate organic decomposition, play the effect of intensified by ultrasonic wave ozone reaction.Its reaction mechanism is described below: (1) water directly resolves into hydroxyl (H
2o → H+OH), the further oxidize organic molecules of hydroxyl; (2) water and ozone generation serial reaction (5O
3+ 3H
2o → 6HO
2+ 3O
2, HO
2+ H → H
2o
2, H
2o
2+ 2O
3→ 2OH+3O
2), the hydroxyl of generation, hydrogen peroxide and ozone have strong oxidation, fully act on and react with organism; (3) shockwave that the explosion of ultrasonic cavitation bubble produces instantaneously directly destroys organic molecule structure.
More than show and describe ultimate principle of the present invention, principal character and advantage.The technician of the industry should understand, and above-described embodiment does not limit the present invention in any form, the technical scheme that the mode that all employings are equal to replacement or equivalent transformation obtains, and all drops in protection scope of the present invention.
Claims (9)
1. a plasma body and ultrasonic combined water treatment device, it is characterized in that, comprise atomizing nozzle, dielectric barrier discharge reactor, ozone collection tower, ultraviolet lamp, box reactor, high-voltage pulse power source, ultrasonic-frequency power supply, data gathering and control unit and power supply unit; Described dielectric barrier discharge reactor is connected with described high-voltage pulse power source, the top of described dielectric barrier discharge reactor is provided with atomizing nozzle, lower end and described ozone are collected tower and are connected, the below that described ozone collects tower is provided with described ultraviolet lamp and box reactor, PZT (piezoelectric transducer) and aerating apparatus are equipped with in the bottom of described box reactor, described PZT (piezoelectric transducer) is connected with described ultrasonic-frequency power supply, described power supply unit comprises photovoltaic and civil power combines power supply, and described data gathering and control unit control every other functional unit; Described dielectric barrier discharge reactor comprises a dielectric barrier discharge array, described dielectric barrier discharge array comprises multiple electrode, the quartz glass tube that described electrode is closed by stainless steel stick electrode and one end is formed, described stainless steel stick electrode is inserted in hyaline-quartz pipe, and described high-voltage pulse power source is connected on two adjacent electrodes; Electrode be divided into upper and lower 2 layers parallel staggered, every layer place 20 ~ 30 electrodes, upper and lower two row interelectrode width between centers be 7.00mm;
Discharging gap d between medium layer, atmospheric pressure p and voltage breakdown V
bbetween follow paschen's law, that is:
A and B in formula is constant, V
bfor voltage breakdown, p is atmospheric pressure, and d is the discharging gap between medium layer, and γ is secondary electron yield.
2. a kind of plasma body according to claim 1 and ultrasonic combined water treatment device, is characterized in that, comprises filtering basin and water purification torage tank further, and described filtering basin are connected with described box reactor, and described water purification torage tank is connected with described filtering basin.
3. a kind of plasma body according to claim 1 and ultrasonic combined water treatment device, it is characterized in that, comprise source of the gas, air pump, gas meter further, described source of the gas, air pump, gas meter and ozone concn detecting unit and described aerating apparatus form gas passage.
4. a kind of plasma body according to claim 1 and ultrasonic combined water treatment device, it is characterized in that, comprise piping system further, described piping system comprises multiple valve member, liquid meter, water level gauge, Water Test Kits and pH value adjustment unit, jointly forms fluid passage.
5. a kind of plasma body according to any one of claim 2 to 4 and ultrasonic combined water treatment device, is characterized in that, arbitrary functional unit controls by described data gathering and control unit unification.
6. a kind of plasma body according to claim 1 and ultrasonic combined water treatment device, is characterized in that, described power supply unit is powered to all functions unit, and the control of described data gathering and control unit preferentially adopts photovoltaic power supply.
7. utilize the device described in any one of claim 1-6 to carry out the technical process of plasma body and ultrasonic combined water treatment, it is characterized in that, comprise the following steps:
A. source of the gas and pending water enter described atomizing nozzle simultaneously, be converted into jet spray, through described dielectric barrier discharge reactor, start described high-voltage pulse power source, described dielectric barrier discharge reactor produces corona discharge under high-voltage pulse electric source forcing, jet spray is when through electrical discharge zone, and the poisonous and harmful substances in the active particle of electrical discharge zone and water reacts;
B. the water through described dielectric barrier discharge reactor for treatment is collected in described box reactor, the residual ozone that described dielectric barrier discharge reactor exoelectrical reaction produces collects in tower sink and gather in the water surface overhead of described box reactor at ozone, when the water level of described box reactor reaches predetermined height, ozone concn reaches preset value, start described ultrasonic-frequency power supply and ultraviolet lamp, the PZT (piezoelectric transducer) being in described box reactor bottom sends ultrasonic wave, use intensified by ultrasonic wave ozone, collaborative ultraviolet carries out secondary treatment to water;
C. through the water of secondary treatment reach drink or emission standard time, treated water is extracted out from box reactor, injects filtering basin, after filtering impurities in water, send into water purification torage tank.
8. the technical process of a kind of plasma body according to claim 7 and ultrasonic combined water treatment, it is characterized in that, after secondary treatment water also do not reach drink or emission standard time, start liquid pump and high-voltage pulse power source, water processed through dielectric barrier discharge reactor again; Dielectric barrier discharge reactor has associated treatment and timesharing associated treatment two kinds of patterns simultaneously respectively with ultraviolet lamp and intensified by ultrasonic wave ozone.
9. the technical process of a kind of plasma body according to claim 7 and ultrasonic combined water treatment device, it is characterized in that, when described filtering basin dirt is built up and caused deteriorating water quality in water purification torage tank, the water in water purification torage tank is drawn back box reactor counterflush is carried out to filtering basin.
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