CN102765787A - Method for sterilizing and disinfecting sewage by injecting plasma free radicals and device - Google Patents

Abstract

The invention relates to the field of water treatment, in particular to a method for sterilizing and disinfecting sewage by injecting plasma free radicals. Oxygen-containing gas reacts in a plasma generator so as to produce the plasma free radicals, the plasma free radicals are conveyed to bubbling devices in a disinfection container by a conveying device, sewage is fed by the bubbling devices, and then the sewage in the disinfection container is disinfected and sterilized. The invention also relates to a device for treating the sewage by the method. According to the device and the method, the oxygen-containing gas is subjected to dissociation and collision ionization in the plasma generator so as to form the active substances of the plasma free radicals, and the gas containing the active ingredients is injected into the sewage to be treated by the bubbling devices, so that germs and viruses in water are killed by oxidation, and the disinfection and sterilization aim is fulfilled; and due to the adoption of the plasma generator, compared with the conventional ultraviolet disinfection, the method has the advantages that energy consumption is greatly reduced, and after the active substances of the plasma free radicals participate in sewage disinfection, second pollutants are not produced, so that environment can be protected.

Description

Injected plasma free radical disinfecting disinfectant method and device in the sewage

Technical field

The present invention relates to water treatment field, injected plasma free radical disinfecting disinfectant method and device in particularly a kind of sewage.

Background technology

China's water pollution situation is quite serious at present, and in recent years, nearly 1.64 hundred million tons of trade effluent and sewage quantity discharged every day wherein 80% were handled without strictness and directly to be entered river waters; In the nearly 100,000 kilometers section, 1700 big rivers, the whole nation, nearly 1/2 section is polluted, and 1/10 section is by severe contamination; Urban waters more than 90% is polluted.On the other hand, China is one of country of water resources critical shortage in the world, go to support the people who accounts for the world 20% with the water that accounts for theworld 6%, and the owning amount of tap water per capita of China is merely 1/4 of world average level.Therefore, carry forward vigorously China's purification of water quality, extremely urgent.The key of drinking water safety at first is the control of source of pollution; Wherein the control of the organic pollutant of sewage and waste water and virus killing sterilization etc. becomes key, and country also puts into effect national standards such as " the People's Republic of China's integrated wastewater discharge standard ", " urban wastewater treatment firm pollutant emission standard ", " municipal sewage plant's sewage sludge emission standard " in succession.

Sterilization is last procedure of purification of water quality.Water treatment sterilization process commonly used has halogen sterilization (like chlorine, dioxide peroxide), oxygenant sterilization (like ozone, Peracetic Acid), radiation sterilization (like ultraviolet ray).In above-mentioned wastewater disinfection technology commonly used, or produce deleterious DBPs, have " three cause " material, can produce the long term toxicity influence human and hydrobiont; Or on-the-spot preparation apparatus is complicated, and investment is big, cost is higher, equipment control complicacy etc.; Then there are problems such as price and high maintenance cost, ultraviolet light transmission, the equipment power consumption of dirt film, the large power long life-span silica tube of photorecombination bacteriological aftergrowth, quartz socket tube be bigger in ultraviolet technique.Owing to these reasons, at present domestic water treatment sterilization process and the device that just needs a kind of less energy-consumption, low cost, non-secondary pollution.

Summary of the invention

In order to overcome above-mentioned technical problem, the object of the present invention is to provide injected plasma free radical disinfecting disinfectant method and device in the sewage of a kind of less energy-consumption, non-secondary pollution.

The technical scheme that the present invention adopted is:

Injected plasma free radical disinfecting disinfectant method in a kind of sewage; Oxygen-containing gas reacts in plasma generator and produces the plasma body radical; After the plasma body radical is delivered to the bubbling device in the sterilized container through e Foerderanlage; Get into the sewage from said bubbling device again, to the sterilization that carries out disinfection of the sewage in the said sterilized container.

It is a kind of or be no less than a kind of combination that the discharge type of said plasma generator is that line is board-like, line cartridge type, plate are board-like.

Injected plasma free radical disinfecting disinfectant device in a kind of sewage; Comprise plasma generator and the sterilized container that the wastewater disinfection environment is provided; Be provided with bubbling device in the said sterilized container; Be provided with e Foerderanlage between said bubbling device and plasma generator, said e Foerderanlage comprises the transfer passage that is connected between bubbling device and plasma generator.

Said e Foerderanlage comprises the air compressor machine that is connected on the transfer passage.

Be provided with two cover bubbling devices in the said sterilized container.

Said bubbling device comprises the aerator that is arranged on the sterilized container bottom.

Said aerator comprises aeration head, and said aeration head is cylindric or spherical, and the aperture is the 0.1-2000 micron.

Said plasma generator comprises reactor body and power supply.

Said reactor body is right cylinder, rectangular parallelepiped or the square of metal material.

Said power supply is a high-frequency and high-voltage power supply.

The invention has the beneficial effects as follows: in the present invention, disassociation and ionization by collision take place in oxygen-containing gas in plasma generator, produce plasma free radical activity material; And these gases that contain active substance are passed through bubbling device inject treatment sewage; Thereby the germ virus in the water is killed in oxidation, reaches the purpose of sterilization, owing to adopted plasma generator; Compare with traditional uv sterilisation; Energy consumption reduces greatly, and does not produce secondary pollutant behind the plasma free radical activity material participation wastewater disinfection, is more conducive to the realization of environmental protection.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is further specified.

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the curve synoptic diagram of treatment effect in the preferred embodiment of the present invention.

Embodiment

As shown in Figure 1, injected plasma free radical disinfecting disinfectant method in a kind of sewage, the step below having comprised:

(1) oxygen-containing gas reacts in plasma generator 1 and produces the plasma body radical; Oxygen-containing gas is air, oxygen or oxygen-containing gas mixture; After oxygen-containing gas gets into plasma generator 1; Disassociation and ionization by collision take place in the high-voltage electric field space of plasma generator 1, produce the plasma radical, and the plasma radical contain plasma free radical activity material (OH^-, O, O₃, O₂, OH, H₂O₂Deng);

(2) the plasma body radical is delivered in thebubbling device 3 in the sterilized container 2 through the air pressure of e Foerderanlage generation;

(3) the plasma body radical gets into frombubbling device 3 in the sewage, because plasma free radical activity material has strong oxidizing property, thereby the organoid through disruptive oxidation decomposition germ virus, enzyme, DNA, RNA etc. reach the effect of sterilization.

It is a kind of or be no less than a kind of any combination that the discharge type of plasma generator 1 is that line is board-like, line cartridge type, plate are board-like.

Injected plasma free radical disinfecting disinfectant device in a kind of sewage; Comprise plasma generator 1 and the sterilized container 2 that the wastewater disinfection environment is provided; Be provided withbubbling device 3 in the said sterilized container 2; 1 of saidbubbling device 3 and plasma generator are provided with e Foerderanlage, and said e Foerderanlage comprises the transfer passage 4 that is connected 1 ofbubbling device 3 and plasma generator

E Foerderanlage comprises the air compressor machine 5 that is connected on the transfer passage 4; Air compressor machine 5 is collected the air in the environment and through transfer passage 4 air is delivered in thebubbling device 3; Because the outlet of plasma generator 1 accesses in the transfer passage 4, the plasma body radical that therefore produces is also along with pressurized air gets intobubbling device 3.

Bubbling device 3 is installed in sterilized container 2 bottoms, and everycover bubbling device 3 comprises theaerator 6 that is mounted in sterilized container 2 bottoms equally.Bubbling device 3 is many more withaerator 6, is distributed in the sterilized container 2 just evenly, and the plasma body radical mixes just abundant more with sewage, and sterilisation effect is better.Aerator 6 is made up of a plurality of aeration heads, and these aeration heads are cylindric or spherical, on horizontal plane, is cruciform and arranges that the aperture is the 0.1-2000 micron.

Plasma generator 1 comprisesreactor body 11 and power supply 12.Reactor body 11 has constituted an electric field space by negative electrode and anode, and disassociation and ionization by collision just take place in electric field space oxygen-containing gas, produce plasma body free radical activitymaterial.Reactor body 11 is right cylinder, rectangular parallelepiped or the square of metalmaterial.Power supply 12 is a high-frequency and high-voltage power supply.

In the present embodiment, the producer body is the stainless steel cylindrical structure, diameter 100 mm, and anode discharge electrode material is a stainless steel, is shaped as the prickle shape, diameter 5 mm, totally one.Power supply 12 is a high-frequency and high-voltage power supply.Be provided with 2 coverbubbling devices 3 in the sterilized container 2,200 microns in aeration head aperture is the bottom that cruciform is arranged in reaction vessel.Choose colibacillus of excrement as the target processing thing, with the injecting gas of air as plasma generator 1, sewage is taken from sewage work, the water yield 120 L, and the tolerance flow that injects sewage is 5 m³/ h, colibacillus of excrement are 374000/L, and the secondary voltage of plasma generator 1 is 20 kV; Treatment time, when handling to 21 minutes, colibacillus of excrement was reduced to 9800/L at 30 minutes; Clearance is 99.7%, and water outlet reaches one-level B and goes out water quality standard (GB18918-2002); When handling to 30 minutes, colibacillus of excrement is reduced to 960/L, and clearance is 99.9%, and water outlet reaches one-level A and goes out water quality standard (GB18918-2002), and is as shown in Figure 2.

The above is the preferred embodiment of the present invention, and it does not constitute the restriction to protection domain of the present invention.

Claims (10)

1. injected plasma free radical disinfecting disinfectant method in the sewage; It is characterized in that: oxygen-containing gas reacts in plasma generator (1) and produces the plasma body radical; After the plasma body radical is delivered to the bubbling device (3) in the sterilized container (2) through e Foerderanlage; Again from said bubbling device (3) gets into sewage, to the sterilization that carries out disinfection of the sewage in the said sterilized container (2).

2. injected plasma free radical disinfecting disinfectant method in the sewage according to claim 1 is characterized in that: the discharge type of said plasma generator (1) is that line is board-like, a kind of in board-like of line cartridge type, plate or be no less than a kind of combination.

3. the described method of utilization claim 1 is carried out the device of sterilization to sewage; It is characterized in that: comprise plasma generator (1) and the sterilized container (2) of wastewater disinfection environment is provided; Be provided with bubbling device (3) in the said sterilized container (2); Be provided with e Foerderanlage between said bubbling device (3) and plasma generator (1), said e Foerderanlage comprises the transfer passage (4) that is connected between bubbling device (3) and plasma generator (1).

4. injected plasma free radical disinfecting disinfectant device in the sewage according to claim 3 is characterized in that: said e Foerderanlage comprises the air compressor machine (5) that is connected on the transfer passage (1).

5. injected plasma free radical disinfecting disinfectant device in the sewage according to claim 3 is characterized in that: be provided with two cover bubbling devices (3) in the said sterilized container (2).

6. according to injected plasma free radical disinfecting disinfectant device in claim 3 or the 5 described sewage, it is characterized in that: said bubbling device (3) comprises the aerator (6) that is arranged on sterilized container (2) bottom.

7. injected plasma free radical disinfecting disinfectant device in the sewage according to claim 6, it is characterized in that: said aerator (6) comprises aeration head, and said aeration head is cylindric or spherical, and the aperture is the 0.1-2000 micron.

8. according to injected plasma free radical disinfecting disinfectant device in claim 3 or the 4 described sewage, it is characterized in that: said plasma generator (1) comprises reactor body (11) and power supply (12).

9. injected plasma free radical disinfecting disinfectant device in the sewage according to claim 8, it is characterized in that: said reactor body (11) is the right cylinder of metal material, rectangular parallelepiped or square.

10. injected plasma free radical disinfecting disinfectant device in the sewage according to claim 8 is characterized in that: said power supply (12) is a high-frequency and high-voltage power supply.

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