CN101780999A

CN101780999A - Discharging atomizing and catalyzing cooperation water treating method

Info

Publication number: CN101780999A
Application number: CN200910262104A
Authority: CN
Inventors: 孙明
Original assignee: Shanghai Maritime University
Current assignee: Shanghai Maritime University
Priority date: 2009-12-17
Filing date: 2009-12-17
Publication date: 2010-07-21
Anticipated expiration: 2029-12-17
Also published as: CN101780999B

Abstract

The invention relates to a water treating method by discharging and atomizing water to be treated and a discharging plasma carrying out transition luminescence to excite the activity of a plating film titanium dioxide catalyst. The water to be treated is atomized by a multiple-nozzle metal discharging electrode and sprayed out, is atomized under the actions of strong electric field force and surface tension, and is distributed in a grounding treating chamber which is used as a discharging reacting chamber in a small droplet form. When the water to be treated passes through the grounding treating chamber, the inner wall of which is plated with a titanium dioxide film, the activity of the titanium dioxide is excited by the transition luminescence of a discharging plasma ultraviolet area, and contaminants in the water to be treated are removed. The water enters a water storage pool, is delivered to the top of the water treating chamber by a water pump, and starts one new circulation. The invention has the advantages that the water to be treated is sprayed out from the discharging electrode, thereby increasing the action probability of the discharging plasma and the contaminants in the water; the activity of the titanium dioxide is excited by the transition luminescence of the discharging plasma, the method is simple, the action is effective, and the removal rate of the contaminants can be enhanced at high efficiency.

Description

Discharging atomizing and catalyzing cooperation water treating method

Technical field

The present invention relates to discharge plasma water purifier field, be specifically related to the process for purifying water that pending water of discharging atomizing and catalysis means combine.

Background technology

Discharge plasma technique is applied to the improvement to environment thing pollutent, has significant advantages such as not having secondary pollution.Contain in the discharge plasma and comprise hydroxyl (OH), Sauerstoffatom (O), ozone (O ₃), hydrogen peroxide (H ₂O ₂) the isoreactivity species, can carry out oxidation or reduction reaction with multiple environmental pollutant, kill pathogenic bacterium, decomposition or transform poisonous, objectionable impurities.Adopt discharge plasma that the water purification treatment technology is comprised last century, the nineties began discharge electrode is placed on the water surface, the surface at water in discharge process forms " taylor cone "; Discharge electrode in recent years places pending water, and increases the quantity of living radical by aeration in pending water; And recently Dalian University of Technology put forward with discharge plasma that geseous discharge generated by the aeration form, add the form of the liquid electrode surface discharge in the pending water etc.Thus, discharge plasma, to acting on around the discharge electrode, but contacts with pending water to big area from only acting on the surface of water the effect of water pollutant, and sphere of action progressively strengthens.But the life-span of active specy is very short, is example with the OH free radical, only is 10 ^-7S, these active substances in diffusion process can since self from the de excitation of excited state to ground state, perhaps rapidly disappear with the collision of other particles, so discharge electrode places on the water surface, discharge electrode places pending water or discharge plasma is joined the form of pending water with the form of air-blowing, all because of the own characteristic of discharge plasma is subjected to certain restriction, the efficient of discharge plasma water treatment remains further to be improved for the effect that makes full use of discharge plasma and water pollutant.

Summary of the invention

The objective of the invention is on the basis of existing technology, propose a kind of water treating method that makes discharge plasma more effectively act on the pollutent in the water, improve removal efficiency water pollutant.

Technical scheme of the present invention is formed discharging atomizing and catalyzing cooperation water treating device by discharging atomizing system, treatment chamber and tank.Pending water is from multi-nozzle metal discharge electrode atomizing ejection, in the ground connection treatment chamber of stainless material, inwall plating titanium dioxide film, pass through, enter tank, by water pump the water in the tank is delivered to the treatment chamber apical position, enter the telescopic metal water inlet pipe that the overcoat insulating material that links to each other with the nozzle that discharges is made through the insulation joint, begin new circulation.The discharge injector electrode is one group or two groups, and every group is six nozzles, connects nozzle and water inlet pipe by metallic water pipe, and nozzle is parallel with process chamber sidewalls, is evenly distributed on columniform inner treatment chamber space.If adopt the form of two groups of nozzles, the length difference of the nozzle of two groups of discharge electrodes and the connection water pipe between the water inlet pipe, longer from the connection water pipe of one group of near discharge electrode of water inlet pipe, and two groups of discharge nozzles are alternately distributed in the space.TiO 2 coating film is with the zonal arrangement position in treatment chamber inwall and discharge nozzle correspondence, its center line of plated film band and the alignment of discharge nozzle tip.Pending water, is atomized under forceful electric power field force and capillary effect from multi-nozzle discharge electrode ejection, is distributed in the exoelectrical reaction space with the form of small droplets.Near the concentration of discharge plasma discharge electrode is the highest, and pending water is from the highest discharge electrode processes of stripped concentration such as discharges, and is atomized into the form of small droplets, has increased the probability of discharge plasma and water pollutant effect greatly.Plate titanium dioxide film on the inwall of treatment chamber, utilize the transition luminescence of discharge plasma ultraviolet region, the light of this wavelength period can excite the activity of titanium dioxide well, improves the action effect of discharge plasma to pollutant removing.

The invention has the beneficial effects as follows the ejection of the water self-discharge utmost point, increased the effect probability of discharge plasma and water pollutant; Utilize the transition luminescence of discharge plasma to excite the activity of plated film titanium dioxide, means are simpler, and action effect is better, can effectively improve the removal efficiency of pollutent.

Description of drawings

Further specify the present invention below in conjunction with accompanying drawing and case study on implementation.

Fig. 1 discharging atomizing of the present invention and catalyzing cooperation water treating device structure iron;

The unified group of Fig. 2 discharging atomizing electrode system of the present invention nozzle arrangements vertical view;

The unified group of Fig. 3 discharging atomizing electrode system of the present invention nozzle arrangements side-view;

Two groups of nozzle arrangements vertical views of Fig. 4 discharging atomizing electrode system of the present invention;

Two groups of nozzle arrangements side-views of Fig. 5 discharging atomizing electrode system of the present invention.

Number in the figure:

1, high pressure access point 2, insulation thimble 3, discharging atomizing system 4, titanium dioxide film 5, treatment chamber 6, isolating joint 7, water inlet pipe 8, water pump 9, rising pipe 10, tank 11, pending water 12, water pipe 13, discharging atomizing injector electrode 14, connection water pipe

Embodiment

Below by a case study on implementation, further specify the present invention.

As shown in Figure 1: the present invention mainly is made up of discharging atomizing system 3 and treatment chamber 5.Water inlet pipe 7 overcoat insulation thimble 2, the present invention enters insulation thimble 2 high pressure access point 1 before by water inlet pipe 7, is system's power supply.If 3 one groups of discharging atomizing systems, then be 6 injector electrodes (seeing Fig. 2, Fig. 3), if its two groups, then be 12 injector electrodes (seeing Fig. 4, Fig. 5).Pending water 11 is smoked from tank 10 by water pump 8, enters discharging atomizing system 3 through water pipe 12 and isolating joint 6, water inlet pipe 7, after treatment chamber 5 is cleaned, gets back to tank 10 by rising pipe 9, begins circular treatment next time.

Treatment chamber 5 is cylindrical shells of being made by metallic substance such as stainless materials: internal diameter 220mm, high 250mm, ground connection.The rising pipe 9 of treatment chamber 5 is made by stainless steel and other metal materials: internal diameter 60mm, long 30mm.Insulation thimble 2 is made by insulating material such as tetrafluoroethylene: internal diameter 80mm, long 100mm.Water inlet pipe 7 is made by metallic substance: internal diameter 60mm, long 160mm.Discharging atomizing electrode 13 is made by corrosion resistant metallic substance such as stainless steels: internal diameter 5mm, wall thickness 2mm, the long 25mm of nozzle.Connect water pipe 14 and make,, connect water pipe 14: long 60mm if adopt one group of injector electrode by corrosion resistant metallic substance such as stainless steels; If adopt two groups of spray group electrodes, above one group connect water pipe 14: long 60mm, below one group of connection water pipe 14: long 45mm, water inlet pipe 7 are between two groups of discharge electrodes, and length is 60mm.Tank 10 materials can be made by materials such as stainless steel or glass: diameter 100mm, high 50mm.Corresponding one group of discharging atomizing injector electrode, titanium dioxide (TiO ₂) film 4: high 80mm, the hanging of plated film band center line and injector electrode; Corresponding two groups of discharging atomizing injector electrodes, titanium dioxide (TiO ₂) film 4: high 110mm, plated film band center line aligns with two groups of discharge injector electrode pipe connecting mid points.

Claims

1. discharging atomizing and catalyzing cooperation water treating method is characterized in that: may further comprise the steps:

1) forms water treating device by discharging atomizing system, treatment chamber and tank;

2) pending water, is atomized under forceful electric power field force and capillary effect from the atomizing ejection of multi-nozzle metal discharge electrode, is distributed in as in the exoelectrical reaction spatial ground connection treatment chamber with the form of small droplets;

3) the treatment chamber inwall plates titanium dioxide film, utilizes the transition luminescence of discharge plasma ultraviolet region, excites the activity of titanium dioxide, and pending water removes wherein pollutent, enters tank then;

4) by water pump the water in the tank is delivered to the treatment chamber apical position, enter the metal water inlet pipe of the overcoat insulating material sleeve pipe that links to each other with the nozzle that discharges, begin new circulation through the insulation joint.

2. water treating method according to claim 1 is characterized in that: described step 2) multi-nozzle metal discharge electrode is one group or two groups, and every group is six nozzles; Nozzle is parallel with process chamber sidewalls, is evenly distributed on columniform inner treatment chamber space.

3. water treating method according to claim 1 is characterized in that: described step 3) treatment chamber inwall plating titanium dioxide film, TiO 2 coating film with zonal arrangement in the treatment chamber inwall and the corresponding position of nozzle of discharging; If corresponding one group of discharging atomizing injector electrode, the then hanging of plated film band center line and injector electrode; If corresponding two groups of discharging atomizing injector electrodes, then plated film band center line aligns with two groups of discharge injector electrode pipe connecting mid points.