CN203200062U - Low air pressure discharge plasma water treatment device - Google Patents
Low air pressure discharge plasma water treatment device Download PDFInfo
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- CN203200062U CN203200062U CN 201320126070 CN201320126070U CN203200062U CN 203200062 U CN203200062 U CN 203200062U CN 201320126070 CN201320126070 CN 201320126070 CN 201320126070 U CN201320126070 U CN 201320126070U CN 203200062 U CN203200062 U CN 203200062U
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Abstract
The utility model relates to a low air pressure discharge plasma water treatment device, which mainly comprises a discharge power supply, a high voltage electrode, a reactor, an atomizing sprayer, a water inlet pipe, a water outlet pipe, a water flow monitor, an air extraction pipe, an air valve, a vacuum pump, a contaminated water tank and a purified water tank, The water treatment device does not need a water pump, and by using the vacuum pump, the low air pressure environment in the reactor can be maintained under the condition that water flows through the reactor, and the system energy consumption is substantially reduced; electric discharge occurs in the low air pressure environment to generate large-volume high-activity non-thermal equilibrium plasma, and thus pollution sources of heavy metal ions, organics, microorganisms and the like in water can be effectively removed, the treatment energy efficiency is high, the water treatment device is universally applied to contaminated water at different pollution levels generated in different industries and can also provide activated water for special industries.
Description
Affiliated technical field
The utility model relates to the applied technical field of low-temperature plasma, is specifically related to a kind of low pressure discharge plasma device that can be used for water treatment.
Technical background
Water treatment method commonly used has: throw out filtration method, water softening, active carbon adsorption, deionization method, reverse osmosis, ultra-filtration method, distillation method, ultraviolet sterilization, biochemical process.The below is the technical characterictic of these water treatment method commonly used:
The throw out filtration method: this is ancient and the simplest purification of water, so this step is commonly used in the preliminary treatment of desalt, or when being necessary, also can add in pipeline into several filters to remove the larger impurity of volume.The employed filter kind of particulate matter that filter to suspend is a lot, strainer filter for example, sand-like filter (such as quartz sand etc.) or membranaceous filter etc.As long as granular size will be blocked greater than the size of these holes.To the ion that is dissolved in the water, just can't stop.If filter is not changed too for a long time or cleaned, the particulate matter that is deposited on the filter can be more and more many, and then discharge and hydraulic pressure can reduce even stop up gradually, so filter needs regularly to change.
Water softening: the softening use ion exchange method that needs of hard water, its purpose is to utilize Zeo-karb to exchange calcium and magnesium ion in the hard water with sodium ion, reduce the concentration of the calcium ions and magnesium ions in the water source with this, in the process of water softening, sodium ion can be used gradually and exhaust, then the bating effect of exchange resin also can reduce gradually, at this moment needs the work of doing to reduce.
Gac: Main Function is to remove chlorine and chlorine ammonia and other molecular weight in 60 to 300 daltonian dissolved organic matter matter.The surface of gac is particulate state, and inside is porous, and specific surface area is large, and the surface in these holes and particle surface have extremely strong physical adsorption ability.Affect gac and remove the area that the factor of organism ability has gac itself, hole size and be eliminated organic molecular weight and polarity thereof, when adsorptive power reaches full Hou of closing, adsorb too much impurity and will fall down the water quality of polluting the downstream, so must regularly remove the impurity that adsorbs on it, the gac that repeatedly just need to more renew after the removing repeatedly.
The deionization method: the purpose of deionization method is that the mineral ion in the dissolving what water is got rid of, and is the same with water softener, also is the principle of utilizing ion exchange resin.Use two kinds of resin-Zeo-karbs and anionite-exchange resin.Zeo-karb utilizes hydrogen ion (H+) to come exchange cation; Anionite-exchange resin then utilizes hydroxide ion (OH-) to exchange negatively charged ion, and hydrogen ion interosculates into neutral water with hydroxide ion.The Hou that the adsorptive power of these resins exhausts also needs to restore, and Zeo-karb needs strong acid to reduce; Opposite, negatively charged ion then needs highly basic to reduce.If anionite-exchange resin approach exhaustion and not reduction, then the most weak fluorine of adsorptive power will engender in water for dialysis, causes richets, osteoporosis and other osseous lesion; If Zeo-karb has run out, hydrogen ion also can appear among the water for dialysis, causes the increase of water quality acidity, so whether the deionization function is effective, needs often to monitor, regularly reduces and upgrades ion-exchange material.
Reverse osmosis method: reverse osmosis method can effectively be removed inorganics, organism, bacterium, pyrogen and other particle etc. in the dissolving what water, is a most important ring in the processing of water for dialysis.Reverse osmosis water is processed semi-permeable membranes material commonly used the fiber plasma membrane, fragrant adoption wine amine, and polyimide or polyfuranes etc. have spiral type, hollow fiber type and tubular-type etc. to its structural shape of what.The advantage of cellulose membrane is that resistance to chlorine is high to these materials of what, but under the situation that (pH 〉=8.0) or bacterium under the condition of alkali exist, can shorten work-ing life.The shortcoming of polyamide is poor to the tolerance of chlorine and chlorine ammonia.If do not perform pre-process before the reverse osmosis then dirt accumulation easily arranged on the permeable membrane, calcium for example, magnesium, the iron plasma causes the decline of reverse osmosis function; Some film (such as polyamide) is easily destroyed by chlorine and chlorine ammonia, therefore before reverse osmosis membrane the pre-process such as activated carbon and softening agent will be arranged.Reverse-osmosis treated speed is slow, cost is high.
The ultra-filtration method: ultra-filtration method and reverse osmosis are similar, also is to use semi-permeable membranes, but the removing of its uncontrollable ion, because the aperture of film is larger, approximately between the 10-200A.Can only get rid of bacterium, virus, pyrogen and granular substance etc. then can't filter water soluble ion.The main effect of ultra-filtration method is to serve as the pre-process of reverse osmosis in case non-return permeable membrane is contaminated by bacterial.The Hou step that it also can be used on water treatment is contaminated by bacterial in pipeline with the water that prevents the upstream.Similar with activated carbon, need fixed time cleaning, change filter membrane.
Distillation method: distillation method can remove any can not volatile impurity, but can't get rid of the pollutent of volatile, it needs very large aqua storage tank to deposit, this aqua storage tank and transfer lime but are the major reasons that pollutes.
Ultraviolet sterilization: mainly be the ultraviolet light irradiation that utilizes 254 nano wave lengths, destroy life core---the DNA of cell, stop cell regeneration, make bacterium become harmless, thereby reach the effect of sterilization.The scale of this system depends on ultraviolet intensity (intensity of irradiator and power) and duration of contact (water, liquid or the air exposure time length under ultraviolet ray).Processing efficiency is low, cost is high.
Biochemical process: the biological chemistry water treatment method utilizes nature to deposit living various bacterial micro-organisms, and organic substance decomposing in the waste water is changed into innoxious substance, and waste water is purified.The biological chemistry water treatment method can divide activated sludge process, biomembrance process, Biological Oxidation Tower, land treatment system, anaerobe water treatment method.The biological chemistry water treatment method cycle is long, takes up an area greatly, is subjected to environmental restraint many.
Plasma method: be a kind of deep oxidation method, its principle is to utilize the reaction of source of pollution in ozone, Sauerstoffatom, the free group of hydroxyl isoreactivity and the water that produces in the discharge plasma, reach the purpose that removes objectionable impurities in the water, follow simultaneously ultraviolet photolysis, shock wave, thereby remove organism, killing pathogenic bacteria in the water.Be exactly specifically: the application of plasma technique in water treatment is exactly various living radicals and ultraviolet strong oxidation and the sterilization effect that takes full advantage of in the plasma body, degraded organic contamination source, sedimentation metal ion, killing pathogenic bacteria, life and industrial sewage processing are all had general applicability, and volume is little.
In sum, the physical method processing efficiency is low, cost is high; Chemical process is processed not thorough, may produce secondary pollution; Biochemical rule is subject to the restriction of environment and the condition such as with high investment; And the validity that the plasma technique processing is polluted has extensively been approved, and volume is little, the investment is low, is not subjected to environmental restraint.
Between more than ten years, the applied research of plasma technique aspect sewage disposal also obtains association area research staff's concern recently, and a collection of research and development achievement is continuous open mutually.For example, Chinese invention patent application number is: 03111599.3, denomination of invention: a kind of electricimpulse minisize plasma body water treatment method and equipment, the feature of this invention is that metallic particles is put into water, then apply electricimpulse, discharge generation minisize plasma body between metallic particles, oxidation, etching surface of metal particles, generation has metal hydride and the oxide compound of strong throwing out, sedimentation behind the impurity in the planar water of metallic surface.Its weak point is to need a large amount of metallic particles, and metallic particles is not easy to be distributed in the water, after the dispersion also not free settling collect, the capacity usage ratio of discharge excitation plasma body is low.
Chinese invention patent application number: 94116647.3, title: pulsed discharge plasma water treatment method and device, it is characterized in that under atmospheric condition, utilize spike pulse voltage to drive thread anode to netted or plate-like cathodes discharge, current are through between two electrodes.The shortcoming of this invention is to adopt the corona discharge pattern of wire electrode, only have in the zonule around the wire electrode plasma generation is arranged, and plasma diffusion is poor, therefore, processes efficiency low, need to could obtain more satisfactory effect through circular treatment repeatedly.
Chinese invention patent application number: 02111033.6, title: plasma water treatment method, to adopt mixing of normal atmosphere pulsed discharge plasma treatment process and Catalyst processing method, it is characterized in that utilizing the atmospheric discharge activated plasma, add the auxiliary of catalyzer, help to improve processing efficiency, weak point is that the capacity usage ratio of atmospheric discharge is low, the interpolation of catalyzer has also significantly increased processing cost, and catalyzer is not easy to reclaim, and has the danger of secondary pollution.
Chinese invention patent application number: 201010138133.7, title: high pressure pulse discharge plasma body water treatment device and high-frequency and high-voltage power supply thereof; And Chinese invention patent application number: 201010138086.6, title: high pressure pulse discharge plasma body water treatment device and method; Chinese invention patent application number: 200910022562.5, title: a kind of dual channel device for treating aqueous discharge plasma; The Chinese utility model patent application number: 201120213976.9, title: a kind of equipment for the high-voltage discharge plasma water treatment; Their feature all is to utilize pending sewage as electrode or the dielectric-slab of atmosphere pressure discharging, directly produce plasma body on the surface of water, advantage is to improve effective contact area of plasma body and water, shortcoming is that the electric conductivity of water is on the low side, can consume the electric energy of larger proportion, reduce efficiency.
Chinese utility model patent application number: 200720013297.0, title: a kind of corona discharge plasma body device for treatment of water, it is characterized in that adopting the needle electrode corona discharge, the pdp body that produces mainly concentrates near the needle point, advantage is to reduce sparking voltage, and shortcoming is the easy loss of needle point, and, the density of corona discharge plasma living radical is on the low side, and diffustivity is poor.
Chinese invention patent application number: 03133403.2, title: a kind of short high-voltage pulse dielectric barrier discharge plasma water treatment method and equipment; The Chinese utility model patent application number: 03213417.7, a kind of dielectric barrier discharge plasma water treating equipment; The Chinese utility model patent application number: 03213417.7, title: a kind of dielectric barrier discharge plasma water treating equipment; Their feature all is to sneak into bubble in water, load high-voltage in the feedwater again, excite underwater bubble discharge generation plasma body, the source of pollution reaction generates settling or floss in plasma body and the water, then filter and remove, advantage is that discharge in water can make plasma body have more fully with water to contact, and shortcoming is to need extra-high pressure to excite, and the usefulness of discharge generation plasma body is low.
Chinese invention patent application number: 200810020181.9, title: plasma water treatment method and device thereof, it is characterized in that adopting arc-over to produce thermal equilibrium plasma disposes of sewage, advantage is that device is simple, shortcoming is to excite arc-over to produce thermal equilibrium plasma to need large electric current, and energy consumption is high, and thermal value is large, and living radical concentration is not high, processes the efficiency of water far below nonequilibrium plasma.
Chinese invention patent application number: 201210417958.1, title: a kind of enhancement type kapillary needle-discharging plasma body water treatment device, it is characterized in that adopting small coreless armature discharge, namely produce gas discharge plasma in the insulated dielectric tube between the metal capillary lower end needle-like mouth of pipe and metal end, the product that generates flows out from the aperture on the metal end and enters pending solution, solution in the reaction vessel is purified, advantage is to reduce sparking voltage, shortcoming is that plasma body is under air-flow drives, when wake flow contacted with liquid, activity had descended a lot, and, similar to the corona discharge of needle electrode, the easy loss of micro-porous electrode.
In sum, present disclosed plasma body water treatment device and method all exist efficiency on the low side, the problems such as unit consumption of energy height, reason are dielectric barrier discharge, corona discharge, spark discharge or the thermal equilibrium plasmas that all is based at present high-frequency and high-voltage for the treatment of the plasma device of sewage.These technology all are discharge or discharge in water generation plasma bodys under atmospheric pressure, most of power consumption is in heating, be used for exciting high energy free radical and ultraviolet electric energy ratio little, and, the efficient of the high-frequency and high-voltage power supply that atmosphere pressure discharging is used itself is also on the low side, therefore, the system power utilization ratio is on the low side.Because air pressure is high, discharge can only be in local zonule activated plasma, and, collision frequency is high, free path is short, the living radical diffustivity is poor in the plasma body, the life-span is short, is not easy to fully contact with source of pollution in the water, therefore, the utilization ratio of living radical is not high, causes processing efficiency low.The low pressure discharge plasma body has been compared a lot of advantages with atmospheric pressure plasma, for example, excite discharge type various, contain direct-current discharge, alternating current discharge, high frequency discharge, radio frequency discharge and microwave discharge, more easily excite large volume, the high reactivity nonthermal plasma, can effectively remove the heavy metal ion in the water, the source of pollution such as organism and microorganism, the processing efficiency is high, the sewage of the different pollution levels that different industries is produced has general applicability, do not need to add chemical reagent and catalyzer, reclaim and the secondary pollution problem without waste, yet, water treatment device needs continual water cycle, keeps under low air pressure condition that water cycle is a difficult problem always inside and outside the reactor.
Summary of the invention
The purpose of this utility model is to solve plasma technique and provides a kind of in the utilisation technology problem of sewage treatment area and can produce large volume, diffustivity is good, the property utilization ratio is high low pressure discharge plasma body water treatment device and method.The problems such as ubiquitous high-frequency high-voltage source efficiency is low in atmosphere pressure discharging activated plasma water treatment device and the method, the geseous discharge utilization rate of electrical is low, volume of plasma is little, diffustivity is poor have been overcome; Also having overcome in reactor has under the condition of uninterrupted water cycle with the external world, need not the difficult problem that forced-ventilated water pump can be kept low pressure discharge environment in the reactor.
The purpose of this utility model is to realize low pressure discharge by following measures: utilize the gravity of water column in the rising pipe to come the inside and outside pressure difference of balanced reaction device, under water uninterruptedly flows to condition with outflow reactor, only need with gas in the continuous extraction device of vacuum pump, can keep hypobaric in the reactor, simultaneously in reactor under the negative pressure effect, sewage can be sucked in the reactor, the sewage of processing becomes water purification, under action of gravity, flow out through pure water pipe, need not forced-ventilated water pump, greatly saved system energy consumption; The low pressure discharge activated plasma, produce large volume, high reactivity nonthermal plasma, living radical diffustivity in the plasma body is good, be easy to fully with sewage in source of pollution fully contact, react, improved water treatment efficiency, and, activated plasma under low air pressure condition, can adopt multiple discharge means, contain the efficient power supply such as direct-current discharge, alternating current discharge, high frequency discharge, radio frequency discharge and microwave discharge and discharge means, improve efficiency.
Described a kind of low pressure discharge plasma body water treatment device, as shown in Figure 1, comprise discharge power supply 1, high voltage electrode 2, reactor 3, atomization sprayer 4, reactor head 5, water inlet pipe 6, discharge monitor 7, rising pipe 8, reactor flange 9, isolated flange 10, extraction pipe 11, gas ballast valve 12, air valve 13, vacuum pump 14, sewage lagoon 15, water purifying tank 16, water intaking valve 17 and outlet valve 18; It is characterized in that, the lower end of the output termination high voltage electrode (2) of discharge power supply 1, discharge power supply and reactor 3 are altogether, high voltage electrode 2 is located on reactor 3 axis, be provided with isolated flange 10 below the reactor flange 9 of reactor bottom, the center of isolated flange 10 is vertically passed and be fixed in the bottom of high voltage electrode 2, the top of high voltage electrode 2 is lower than atomization sprayer 4, the eccentric position of isolated flange 10 is provided with rising pipe 8, the position that reactor 3 tops are higher than atomization sprayer 4 is provided with extraction pipe 11, extraction pipe 11 another termination vacuum pumps 14, be respectively equipped with town's air valve 12 and air valve 13 on the bleeding point of vacuum pump 14, reactor 3 tops are reactor heads 5, the center that water inlet pipe 6 passes reactor head 5 enters in the reactor, link to each other with atomization sprayer 4, water inlet pipe 6 is to being respectively equipped with discharge monitor 7 and water valve 17 between the sewage lagoon 15, rising pipe 8 is provided with water valve 18 between the water purifying tank 16, the liquid level of sewage lagoon 15 is higher than the liquid level of water purifying tank 16, less than 10.33 meters, reactor flange 9 is higher more than 5 meters than the liquid level of water purifying tank 16 to the difference of altitude between the reactor top for the liquid level of sewage lagoon 15.Being different from other plasma body water treatment device discharges in atmospheric pressure, the utility model device is discharge excitation large volume, high reactivity plasma body that diffustivity is strong under low air pressure condition, experimental results show that, the plasma body of disperse is filled the space between full high voltage electrode and the reactor wall, and the efficient of the efficient of discharge excitation plasma body and processing water has significant height; And, by the relative height of liquid level in reactor and sewage lagoon and the water purifying tank rationally is set, sewage is sucked in the reactor under the negative pressure effect, sewage is behind plasma for purification, under action of gravity, flow to water purifying tank, a vacuum pump need not Water circulation hydrodynamics, as long as just can be kept the unimpeded of the interior hypobaric of reactor and the inside and outside water cycle of reactor simultaneously.Improve on the one hand utilization rate of electrical and the water treatment efficiency of discharge excitation plasma body, also saved on the other hand forced-ventilated water pump, further reduced system energy consumption.
Described low pressure discharge plasma body water treatment device, it is characterized in that described reactor bottom is higher more than 5 meters than water purifying tank liquid level, the purpose of reserving enough difference of altitude is to make to have enough water column vertical heights to come balanced reaction device external and internal pressure poor in the rising pipe, makes the water in the water purifying tank can not be sucked into reactor.Because the reactor internal gas pressure far below the normal atmosphere in the external world, according to conventional thinking, uses water purification in the forced-ventilated water pump extraction device, even adopt powerful forced-ventilated water pump also to be difficult to realize.By reactor being arranged at enough height on the water purifying tank liquid level, high such as 10.33 meters, even the reactor internal gas pressure is far below normal atmosphere, water in the water purifying tank is entered the water colunm height that forms in the rising pipe by suck-back can be above 10.33 meters yet, so, can not enter in the reactor, at this moment, the gravity of water column just in time with the poor balance of reactor external and internal pressure, in the situation that the reactor external and internal pressure is poor constant, the height of water column can not change yet, if constantly there is water to inject rising pipe in the reactor, the water that just has respective amount enters water purifying tank from rising pipe, thereby realizes unpowered water being discharged to atmospheric pressure environment in hypobaric reactor.The reactor bottom will exceed how many vertical heights of water purifying tank liquid level at least, depend on that the reactor external and internal pressure is poor, the poor theoretical maximum of reactor external and internal pressure is a normal atmosphere, corresponding 10.33 meter water column height, therefore, the water colunm height of reserving 10.33 meters is just enough, though be higher than 10.33 meters unnecessary property, but, do not affect water purification discharge function and reactor internal gas pressure yet.
Described low pressure discharge plasma body water treatment device, it is characterized in that described sewage lagoon liquid level is than in low 10.33 meters of the reactor top, perhaps the sewage lagoon liquid level is higher than reactor top, make the sewage lagoon liquid level poor less than the reactor external and internal pressure to the suffered gravity of water column of reactor top, guarantee that sewage can be sucked into reactor under the negative pressure effect, need not power just can be with in the water injecting reactor.Because the pressure difference inside and outside the reactor is less than a normal atmosphere, therefore, reactor top should not be higher than the sewage lagoon liquid level more than 10.33 meters.
Described low pressure discharge plasma body water treatment device, it is characterized in that the liquid level of described sewage lagoon is higher than the liquid level of water purifying tank, under the negative pressure effect, only have the water in the sewage lagoon can be sucked into reactor, and the water in the water purifying tank not only can not be sucked in the reactor, and the water in the reactor also can flow under the influence of gravity into water purifying tank.
Described low pressure discharge plasma body water treatment device is characterized in that pressure is less than 0.1MPa in the described reactor.Other plasma body water treatment device all fail to solve the contradiction between hypobaric and water cycle, the energy consumption, therefore all are to adopt atmospheric pressure plasma discharge.The utility model device has been realized unpowered water cycle under low air pressure condition, solved the contradiction between hypobaric and water cycle, the energy consumption, has realized the application of low pressure discharge activated plasma in water treatment.
Described low pressure discharge plasma body water treatment device, it is characterized in that described reactor bottom is higher more than 5 meters than the liquid level of water purifying tank, exceed the suffered gravity of water column of water purifying tank liquid level in the rising pipe, just in time with the poor maintenance balance of reactor external and internal pressure, therefore, the water that the water that flows into rising pipe from reactor can squeeze out the pipe moderate enters the water purifying tank, has realized that water need not power to the extraneous Natural excrement of high atmospheric pressure in hypobaric reactor.
Described low pressure discharge plasma body water treatment device is characterized in that described high voltage electrode is positioned on the cylindrical reactor axis, metal reaction wall and discharge power supply altogether, as another discharge electrode of geseous discharge.The plasma body of discharge generation is filled the space between full two electrodes, cooperates voltage and interelectrode distance to regulate, and can obtain the volume of plasma that needs.Owing under low air pressure condition, discharging, be not easy to produce electric arc, so, need not any medium layer between two electrodes and come Limited Current, be different from atmosphere pressure discharging and usually adopt medium layer to isolate the mode of the Limited Current of two discharge electrodes.
Described low pressure discharge plasma body water treatment device is characterized in that described discharge power supply is a kind of in direct supply, AC power, high-frequency and high-voltage power supply, radio-frequency power supply or the microwave power supply.Under low air pressure condition, adopt the condenser type discharging structure, between the electrode without dielectric impedance, therefore, applicable direct-current discharge, alternating current discharge, high frequency discharge, radio frequency discharge and the multiple discharge type activated plasma of microwave discharge, and can be in the 0.1Pa-0.1MPa air pressure range activated plasma, and atmospheric pressure plasma discharge water treatment device and method only are suitable for the dielectric barrier discharge form generation nonequilibrium plasma of high-frequency and high-voltage, if atmosphere pressure discharging is without the dielectric impedance structure, then very easily produce arc-over, can only produce thermal equilibrium plasma.
Low pressure discharge plasma body water treatment device as claimed in claim 1 is characterized in that described reactor is vertical the placement, makes the globule free fall type of atomization sprayer ejection fly over plasma column.During globule free fall type process plasma column, the contact interface maximization of the two is beneficial to the raising purification efficiency.
Described low pressure discharge plasma body water treatment device is characterized in that described extraction pipe is arranged at reactor head one side, is higher than atomization sprayer.The purpose that bleeding point is higher than atomization sprayer is to avoid directly being brought into vacuum pump by pumping airflow from the water of atomization sprayer ejection.
Described low pressure discharge plasma water treatment method, its treatment step is: regulate the air flow quantity of sneaking in the extraction pipe 11 by gas ballast valve 12, start vacuum pump 14, vacuum pump is the gas in the extraction device 3 continuously, make and be in the subatmospheric state in the reactor 3, vacuum pumping speed is greater than water velocity of evaporation in the reactor, just can keep the reactor internal gas pressure and be lower than saturation vapour pressure.The effect of gas ballast valve is to inject air in extraction pipe, reaches under the prerequisite of required air pressure in guaranteeing reactor, and dilution enters the humidity of gas in the vacuum pump, can prolong service life of vacuum pump; Start discharge power supply 1, the discharge power supply output HIGH voltage is to high voltage electrode 2, the metal wall discharge of the reactor 3 of 2 pairs of ground connection of high voltage electrode, metal wall and the space between the high voltage electrode 2 at reactor 3 produce plasma column, and the electrode structure of condenser type discharge is simple, and electrode life is long, applicable direct current, interchange, high frequency, radio frequency, even microwave discharge mode activated plasma, and, the operating air pressure wide ranges of discharge; Open water intaking valve 17, and by the discharge monitor adjusting discharge of sewage, under the negative pressure effect, sewage enters in the reactor 3 from sewage lagoon 15 suck-backs, sewage sprays downwards through atomization sprayer 4, when unrestrained sewage passes through plasma body, be immersed in the plasma body fully, the two reaction interface is large, pollution substance in the sewage is by plasma oxidation, degraded, and germ is killed, and basically can once finish purification, need not repeatedly circular treatment, this is that other plasma body water treatment device are not accomplished.The atmospheric pressure plasma discharge water treating equipment all are to adopt the discontinuous that repeatedly circulates in the closed cell to process basically, just can reach the purification purpose, are difficult to realize the large-scale processing; Water purification after Cement Composite Treated by Plasma flows under the influence of gravity into rising pipe 8; Open outlet valve 18, water purification flows into water purifying tank 16; In the treating processes, the reactor internal gas pressure is kept stable, the water column vertical height that is higher than the water purifying tank liquid level in the rising pipe also remains unchanged, therefore, there is how much sewage after reactor for treatment, to flow into rising pipe, just there is the water purification of respective amount from rising pipe, to enter water purifying tank, remaining continual water cycle with the external world in the reactor; Constantly having sewage to flow under the condition with the water purification outflow reactor, gas in the continuous extraction device of vacuum pump remains hypobaric in the reactor.
The atmospheric pressure plasma water treatment method, perhaps spray to the water surface at discharge in water or in level discharge or plasma jet, volume of plasma is little, activity is low, diffustivity is poor, the contact interface of plasma body and water is little, and therefore, the water treatment energy consumption is high, poor effect.The high reactivity plasma body that the utility model is low air pressure condition discharge excitation large volume, diffustivity is strong, the efficient of the efficient of discharge excitation plasma body and processing water is significantly higher than atmospheric pressure plasma discharge water treatment device and method; Under low air pressure condition, realized unpowered water cycle, solved the contradiction between hypobaric and water cycle, the energy consumption, as long as a vacuum pump just can be kept the unimpeded of the interior hypobaric of reactor and the inside and outside water cycle of reactor simultaneously; The atomizing globule is immersed in the plasma body fully, and the tiny globule has larger specific surface area, with plasma body larger contact interface is arranged; spray from atomization sprayer at the globule; when passing through the plasma column of long-range, with plasma body there is the sufficient reaction times, thereby guaranteed the purification efficiency of sewage and processed efficiency; thereby; basically can once finish purification, reach the purification target, need not repeatedly circular treatment; the discontinuous discontinuity treatment of real realization is easy to mass-producing and processes.Improve on the one hand utilization rate of electrical and the water treatment efficiency of discharge excitation plasma body, also saved on the other hand forced-ventilated water pump, further reduced system energy consumption.
Description of drawings
Fig. 1, low pressure discharge plasma body water treatment device schematic diagram.
Fig. 2, low pressure discharge plasma body water treatment system schematic diagram.
1-discharge power supply among the figure, 2-high voltage electrode, 3-reactor, the 4-atomization sprayer, 5-reactor head, 6-water inlet pipe, 7-discharge monitor, 8-rising pipe, 9-reactor flange, the 10-isolated flange, 11-extraction pipe, 12-gas ballast valve, the 13-air valve, 14-vacuum pump, 15-sewage lagoon, the 16-water purifying tank, 17-water intaking valve, 18-outlet valve.
Embodiment 1
The low pressure discharge plasma body water treatment device of specific embodiment of the utility model 1, as shown in Figure 1, used discharge power supply (1) is the 1000W radio-frequency power supply with impedance Auto-matching module; Reactor (3) adopts long 1500mm, external diameter 100mm, the stainless steel tube of wall thickness 3mm, bottom and reactor flange (9) weld together, seam crossing reaches vacuum-sealing, reactor top weld equally one with the supporting flange of reactor head (5); Water inlet pipe (6) one ends are welded to reactor head (5) center, and seam crossing reaches vacuum-sealing, and the other end connects discharge monitor (7), and the discharge monitor can be regulated and real time monitoring discharge from 1 liter/min of clock to 20 liter/min clock; The isolated flange (10) that adopts engineering plastics processing and reactor flange (9) to mate; High voltage electrode (2) adopts long 1200mm, and diameter is the stainless steel solid rod of 25mm, and the bottom has the rib-loop hole of dark 30mm, is fixed on the center of isolated flange (10) by viton seal ring and screw; Rising pipe (8) adopts engineering plastics processing with isolated flange (10) connection portion; Extraction pipe (11) one ends are welded to a side on reactor (3) top, seam crossing reaches vacuum-sealing, the other end has the opening of two fast acting flanges of KF40 standard, one of them fast acting flange is connected with gas ballast valve (12), and another fast acting flange is connected with air valve (13) by the corrugated stainless steel tubing of KF40 standard; Vacuum pump (14) adopts 2X-4 sliding vane rotary vacuum pump, 4 liters/second of pumping speed; Sewage lagoon (15) liquid level is lower 2 meters than reactor top; Water purifying tank (16) is than low 10.33 meters of reactor bottom flange.From the reactor head flange to water inlet pipe bottom, and from the isolated flange to the rising pipe bottom, all accomplish good vacuum-sealing.
As follows to the fade flow process processed of the rhodamine B aqueous solution of concentration 90mg/L:
1, starts vacuum pump, and regulate the gas ballast valve charge flow rate, make reactor internal gas pressure degree less than 10
-2MPa.
2, start radio-frequency power supply, activated plasma is kept the radio frequency power output of 1000W, and reflective power is less than 50W.
3, open respectively rising pipe water valve and water inlet pipe water valve, the regulating water flow monitor, keeping discharge is 2 liter/mins of clocks.
From sewage lagoon and water purifying tank, extract respectively sample and carry out the transmissivity detection, the sewage sample transmissivity is 20%, water purification sample transmissivity is 92%, experiment shows, the utility model is equivalent to the atmospheric pressure plasma discharge water treatment device of Same Efficieney and water treatment amount and method 20-30 minute treatment effect to the disposable obvious processing effect of sewage.
Embodiment 2
By structure shown in Figure 2, the single reactor train of (as shown in Figure 1) among 5 embodiment 1 is assembled into a system side by side, wherein, radio-frequency power supply, vacuum group (comprising vacuum pump, air valve, gas ballast valve and extraction pipe), discharge monitor, sewage lagoon and water purifying tank are five reactors and share, therefore, radio-frequency power supply rated output is 5000W, and vacuum pump is the 2X-15 of 15 liters of per second pumping speed, and the discharge monitor is that 5 liter/mins of clock to 100 liter/min clocks are adjustable.Water treatment process is the same with embodiment 1, and the result is also consistent.
Claims (10)
1. a low pressure discharge plasma body water treatment device comprises discharge power supply (1), high voltage electrode (2), reactor (3), atomization sprayer (4), reactor head (5), water inlet pipe (6), discharge monitor (7), rising pipe (8), reactor flange (9), isolated flange (10), extraction pipe (11), gas ballast valve (12), air valve (13), vacuum pump (14), sewage lagoon (15), water purifying tank (16), water intaking valve (17) and outlet valve (18); It is characterized in that, the lower end of discharge power supply (1) output termination high voltage electrode (2), discharge power supply and reactor (3) are altogether, high voltage electrode (2) is located on reactor (3) axis, be provided with isolated flange (10) below the reactor flange (9) of reactor bottom, the center of isolated flange (10) is vertically passed and be fixed in the bottom of high voltage electrode (2), the top of high voltage electrode (2) is lower than atomization sprayer (4), the eccentric position of isolated flange (10) is provided with rising pipe (8), the position that reactor (3) top is higher than atomization sprayer (4) is provided with extraction pipe (11), another termination vacuum pump (14) of extraction pipe (11), be respectively equipped with town's air valve (12) and air valve (13) on the bleeding point of vacuum pump (14), reactor (3) top is reactor head (5), the center that water inlet pipe (6) passes reactor head (5) enters in the reactor, link to each other with atomization sprayer (4), water inlet pipe (6) is to being respectively equipped with discharge monitor (7) and water intaking valve (17) between the sewage lagoon (15), rising pipe (8) is provided with outlet valve (18) between the water purifying tank (16), the liquid level of sewage lagoon (15) is higher than the liquid level of water purifying tank (16), less than 10.33 meters, reactor flange (9) is higher more than 5 meters than the liquid level of water purifying tank (16) to the difference of altitude between the reactor top for the liquid level of sewage lagoon (15).
2. low pressure discharge plasma body water treatment device as claimed in claim 1, it is characterized in that described reactor bottom is higher more than 5 meters than the liquid level of water purifying tank, exceed the suffered gravity of water column of water purifying tank liquid level in the rising pipe, just in time with the poor maintenance balance of reactor external and internal pressure, the water in the water purifying tank can not be sucked into reactor.
3. low pressure discharge plasma body water treatment device as claimed in claim 1, it is characterized in that described sewage lagoon liquid level is than in low 10 meters of the reactor top, perhaps the sewage lagoon liquid level is higher than reactor top, make the sewage lagoon liquid level poor less than the reactor external and internal pressure to the suffered gravity of water column of reactor top, guarantee that sewage can be sucked into reactor under the negative pressure effect.
4. low pressure discharge plasma body water treatment device as claimed in claim 1, it is characterized in that the liquid level of described sewage lagoon is higher than the liquid level of water purifying tank, in the treating processes, in the continuous inflow reactor of the water in the sewage lagoon, after Cement Composite Treated by Plasma, flow to water purifying tank.
5. low pressure discharge plasma body water treatment device as claimed in claim 1 is characterized in that pressure is less than 0.1MPa in the described reactor.
6. low pressure discharge plasma body water treatment device as claimed in claim 1 is characterized in that described rising pipe is positioned at the reactor bottom.
7. low pressure discharge plasma body water treatment device as claimed in claim 1 is characterized in that described discharge power supply is a kind of in direct supply, AC power, high-frequency and high-voltage power supply, radio-frequency power supply or the microwave power supply.
8. low pressure discharge plasma body water treatment device as claimed in claim 1 is characterized in that described high voltage electrode is positioned on the cylindrical reactor axis, metal reaction wall and discharge power supply altogether, as another discharge electrode of geseous discharge.
9. low pressure discharge plasma body water treatment device as claimed in claim 1 is characterized in that described reactor is vertical the placement, makes the globule free fall type of atomization sprayer ejection through plasma column.
10. low pressure discharge plasma body water treatment device as claimed in claim 1 is characterized in that described extraction pipe is arranged at reactor head one side, is higher than atomization sprayer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320126070 CN203200062U (en) | 2013-03-19 | 2013-03-19 | Low air pressure discharge plasma water treatment device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320126070 CN203200062U (en) | 2013-03-19 | 2013-03-19 | Low air pressure discharge plasma water treatment device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103693714A (en) * | 2014-01-10 | 2014-04-02 | 重庆大学 | High-pressure atomizing dielectric barrier discharge plasma water treatment device |
| CN104058480A (en) * | 2013-03-19 | 2014-09-24 | 孙红梅 | Low-pressure discharge plasma water treating apparatus and method |
| CN105036252A (en) * | 2015-07-02 | 2015-11-11 | 中国科学院等离子体物理研究所 | Normal-temperature water treatment apparatus and method using high-speed fine liquid drop discharging |
| CN110526342A (en) * | 2019-10-12 | 2019-12-03 | 大连民族大学 | A kind of manifold type sewage purification system |
| CN110642332A (en) * | 2019-10-12 | 2020-01-03 | 大连民族大学 | Array jet water purifier |
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2013
- 2013-03-19 CN CN 201320126070 patent/CN203200062U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104058480A (en) * | 2013-03-19 | 2014-09-24 | 孙红梅 | Low-pressure discharge plasma water treating apparatus and method |
| CN104058480B (en) * | 2013-03-19 | 2015-09-02 | 孙红梅 | Low pressure discharge plasma body water treatment device and method |
| CN103693714A (en) * | 2014-01-10 | 2014-04-02 | 重庆大学 | High-pressure atomizing dielectric barrier discharge plasma water treatment device |
| CN105036252A (en) * | 2015-07-02 | 2015-11-11 | 中国科学院等离子体物理研究所 | Normal-temperature water treatment apparatus and method using high-speed fine liquid drop discharging |
| CN110526342A (en) * | 2019-10-12 | 2019-12-03 | 大连民族大学 | A kind of manifold type sewage purification system |
| CN110642332A (en) * | 2019-10-12 | 2020-01-03 | 大连民族大学 | Array jet water purifier |
| CN110526342B (en) * | 2019-10-12 | 2022-08-30 | 大连民族大学 | Coupled sewage purification system |
| CN110642332B (en) * | 2019-10-12 | 2022-08-30 | 大连民族大学 | Array jet water purifier |
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