CN109019755B

CN109019755B - Annular device for treating organic wastewater through laser cavitation

Info

Publication number: CN109019755B
Application number: CN201810815768.2A
Authority: CN
Inventors: 栾小康; 任旭东; 罗春晖; 唐金科; 吴柯; 张洪峰; 佟艳群
Original assignee: Jiangsu University
Current assignee: Jiangsu University
Priority date: 2018-07-16
Filing date: 2018-07-16
Publication date: 2021-07-20
Anticipated expiration: 2038-07-16
Also published as: CN109019755A

Abstract

The invention relates to an annular device for treating organic wastewater by laser cavitation, which comprises an annular cavitation bin, wherein an annular incidence window is arranged on the annular cavitation bin, an annular laser beam emitting device is arranged above the annular incidence window, a water inlet pipe and a water outlet pipe are arranged on the annular cavitation bin, a first electric stop valve is arranged on a pipeline of the water inlet pipe, and a second electric stop valve is arranged on a pipeline of the water outlet pipe. The invention changes the light path into a light path forming an annular laser aperture, focuses the light path in the annular cavitation bin, and simultaneously uses the electric pump to make the wastewater circularly flow, thereby greatly improving the efficiency of wastewater degradation and saving time. The device does not add any chemical reagent in the process, and is environment-friendly and pollution-free.

Description

Annular device for treating organic wastewater through laser cavitation

Technical Field

The invention belongs to the technical field of water pollution degradation, and particularly relates to an annular device for treating organic wastewater by laser cavitation.

Background

When laser and liquid medium act, if laser can reach the breakdown threshold value of the liquid medium, the liquid can be broken down to generate plasma flash, sonoluminescence and other phenomena, the formed plasma cavity can rapidly expand and grow under the continuous action of the laser energy to form cavitation bubbles similar to hydraulic cavitation, and the cavitation bubbles are broken down after being accompanied by the pulsation process of expansion-contraction-expansion for a plurality of cycles. When the wastewater is extinguished, a large amount of energy can be released, and local extreme environments such as high temperature and high pressure are caused, so that a large amount of free radicals are generated, and the free radicals further react with organic matters to degrade organic pollutants in the wastewater. When the wastewater is extinguished, a large amount of energy can be released, and local extreme environments such as high temperature and high pressure are caused, so that a large amount of free radicals are generated, and the free radicals further react with organic matters to degrade organic pollutants in the wastewater. The method has the characteristics of wide application range and high oxidation efficiency, and has good oxidation effect on various organic matters. The special energy effect formed by cavitation can strengthen the chemical and physical reaction processes, and can well treat the organic wastewater.

At present, a cavitation device is basically designed about the structure of the device in the aspect of hydrodynamic cavitation, and compared with the hydrodynamic cavitation, the laser cavitation device has the advantages of strong controllability, more sufficient degradation and the like. The devices used for laser cavitation are basically square devices, and the laser is focused in the square devices to generate cavitation, but the method only generates cavitation at one position in the cavitation device, and the cavitation efficiency is low. The literature and patents on the ring apparatus for treating organic wastewater by laser cavitation have not been retrieved yet.

Disclosure of Invention

The invention provides an annular device for treating organic wastewater by laser cavitation, solves the problem of low cavitation efficiency of a square device, and has the advantages of strong controllability, high automation level and the like.

In order to realize the purpose, the invention adopts the technical scheme that: the utility model provides an annular device for laser cavitation handles organic waste water, includes annular cavitation storehouse, be equipped with annular incident window on the annular cavitation storehouse, annular incident window top is equipped with annular laser beam emitter, install inlet tube and outlet pipe on the annular cavitation storehouse, install first electric stop valve on the pipeline of inlet tube, install second electric stop valve on the pipeline of outlet pipe.

In the scheme, the annular cavitation bin is further provided with an electric pump, and a water inlet pipe and a water outlet pipe connected with the electric pump are communicated with the wastewater of the annular cavitation bin.

In the above scheme, the annular laser beam emitting device comprises a cone lens, a convex lens, a conical reflector and a plane reflector, the laser beam sequentially passes through the cone lens, the convex lens and the conical reflector, the plane reflector is annular, and the conical reflector is located in the center of the annular plane reflector.

In the scheme, the annular incident window is provided with K9 glass, and the surface of the K9 glass is adhered with a layer of antireflection film.

In the above scheme, the electric pump, the first electric stop valve and the second electric stop valve are all connected with a computer.

In the above scheme, a height difference exists between the water inlet pipe and the water outlet pipe.

In the above scheme, the water inlet pipe and between the first electric stop valve, the water outlet pipe and between the second electric stop valve are connected through flanges.

The invention has the beneficial effects that: 1. the light path is reformed into a light path forming an annular laser aperture, and the light path is focused in an annular cavitation bin through an annular incident window to generate an annular cavitation group, so that the efficiency of cavitation treatment on organic wastewater is greatly improved. 2. When the organic wastewater is treated by laser cavitation, the electric pump is started to ensure that the wastewater in the annular cavitation bin circularly flows, so that free radicals generated by cavitation can more fully react with pollutants in the wastewater, and the effect of wastewater degradation is greatly enhanced. 3. The working states of the electric pump and the stop valve are controlled by the computer, so that the automation level is high and the controllability is strong. 4. No chemical reagent is added in the cavitation process, so that the method is environment-friendly and pollution-free.

Drawings

FIG. 1 is a schematic view of the ring apparatus of the present invention.

Fig. 2 is a schematic diagram of a modified annular light path of the present invention.

In the figure: 1. a computer; 2. a water inlet pipe; 3. a flange; 4. a first electrically powered stop valve; 5. a rubber gasket; 6. an annular cavitation bin; 7. an annular entrance window; 8. an electric pump; 9. annular tabletting; 10. a hexagon socket head cap screw; 11. a water outlet pipe; 12. a second electrically powered stop valve; 13. a laser beam; 14. an axicon lens; 15. a convex lens; 16. a conical reflector; 17. a plane mirror.

Detailed Description

The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1, an annular device for laser cavitation treatment of organic wastewater comprises a water inlet pipe 2, a first electric stop valve 4, an annular cavitation bin 6, an annular incident window 7, a second electric stop valve 12, a water outlet pipe 11 and an electric pump 8; the water inlet pipe 2 is connected with the first electric stop valve through a flange 3 through a flange 4; the water outlet pipe 11 is connected with the second electric stop valve 12 by using the flange 3; the annular incident window 7 is fixed on the annular cavitation bin 6 by an inner hexagonal screw 10 and an annular pressing sheet 9; the electric pump 8, the first electric stop valve 4 and the second electric stop valve 12 are all connected with the computer 1; k9 glass is arranged on the annular incident window 7, and an antireflection film is adhered on the surface of the annular incident window; a height difference exists between the water inlet pipe 2 and the water outlet pipe 11; the water pumping pipe and the water inlet pipe which are connected with the electric pump 8 keep relative position relation; and a rubber gasket 5 is arranged between the flange 3 and the connection for sealing. As shown in fig. 2, the optical path is modified to an optical path forming an annular laser aperture corresponding to the annular cavitation chamber 6, and the optical path forming the annular laser aperture is composed of a laser beam 13, a conical lens 14, a convex lens 15, a conical reflector 16 and a plane reflector 17; the laser beam 13 passes through the conical lens 14, the convex lens 15 and the conical reflector 16 in sequence, the planar reflector 17 is annular, the conical reflector 16 is located in the center of the annular planar reflector 17, and the light path can be adjusted properly according to actual conditions.

The working principle of the invention is as follows: the computer 1 is utilized to open the first electric stop valve 4, the wastewater flows into the annular cavitation bin 6 from the water inlet pipe 2 through the first electric stop valve 4, and the wastewater reaches the volume of the annular cavitation bin 6 when being observed through the annular incidence window 7

When the laser is started, the computer 1 is used for closing the first electric stop valve 4, opening the laser, adjusting the relative position relation among the conical lens 14, the convex lens 15, the conical reflector 16 and the plane reflector 17 and the angle of the plane reflector 17, and enabling the laser beam 13 to pass through the conical lens 14, the convex lens 15, the conical reflector 16 and the plane reflector 17 and then be focused into an annular laser aperture in the annular cavitation bin 6 through the annular incidence window 7 to generate an annular cavitation group. Simultaneously, the computer 1 is utilized to open the electric pump 8 to lead the wastewater in the annular cavitation bin 6 to circularly flowThe free radicals generated by laser cavitation can react with pollutants in the wastewater more fully, and the wastewater degradation effect is greatly enhanced. After the laser works for 20-30 s, the laser is closed, the computer 1 is controlled to open the second electric stop valve 12, so that the degraded wastewater flows out through the water outlet pipe 11, and subsequent related treatment is carried out. The organic wastewater is treated by the operation and continuous circulation.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, or direct or indirect applications in other related fields, which are made by the contents of the present specification, are included in the scope of the present invention.

Claims

1. The annular device for treating the organic wastewater through laser cavitation is characterized by comprising an annular cavitation bin (6), wherein an annular incidence window (7) is arranged on the annular cavitation bin (6), an annular laser beam emitting device is arranged above the annular incidence window (7), a water inlet pipe (2) and a water outlet pipe (11) are installed on the annular cavitation bin (6), a first electric stop valve (4) is installed on a pipeline of the water inlet pipe (2), and a second electric stop valve (12) is installed on a pipeline of the water outlet pipe (11); annular laser beam emitter includes cone lens (14), convex lens (15), conical surface speculum (16) and plane reflector (17), and laser beam (13) loop through cone lens (14) convex lens (15) with conical surface speculum (16), plane reflector (17) are the annular, conical surface speculum (16) are located the central authorities of annular plane speculum (17).

2. The annular device for treating organic wastewater by laser cavitation according to claim 1, wherein an electric pump (8) is further installed on the annular cavitation bin (6), and a water inlet pipe and a water outlet pipe connected with the electric pump (8) are both communicated with the wastewater in the annular cavitation bin (6).

3. The annular device for treating organic wastewater by laser cavitation according to claim 1 or 2, wherein the K9 glass is arranged on the annular incidence window (7), and an antireflection film is attached to the surface of the K9 glass.

4. The ring apparatus for laser cavitation treatment of organic wastewater according to claim 2, characterized in that the electric pump (8), the first electric cut-off valve (4) and the second electric cut-off valve (12) are all connected with the computer (1).

5. The ring apparatus for laser cavitation treatment of organic wastewater according to claim 1 or 2, characterized in that there is a height difference between the inlet pipe (2) and the outlet pipe (11).

6. The annular device for laser cavitation treatment of organic wastewater as claimed in claim 1 or 2, characterized in that the connection between the water inlet pipe (2) and the first electric stop valve (4) and the connection between the water outlet pipe (11) and the second electric stop valve (12) are all through flanges (3).