CN110563078A - sterilization method and sterilization device for water body - Google Patents

Abstract

The invention relates to a sterilizing method and a sterilizing device for water bodies, wherein the method includes using a laser light source to emit a laser beam that can kill bacteria, and guiding the beam into the water body to sterilize the water body; the device includes a device for containing the water body A sterilizing chamber and a laser light source, the laser light source emits laser light that can kill bacteria, a sterilizing chamber is arranged inside the sterilizing chamber, a transparent incident part is arranged on the chamber wall at one end of the sterilizing chamber, and the laser light source is located outside the sterilizing chamber and connected to the The incident part is opposite, and the laser light emitted by the laser light source enters the sterilization cavity through the incident part to sterilize the water body in the sterilization cavity. The invention utilizes laser sterilization, and since the divergence of the laser beam is extremely small, the laser light source can inject all the laser light into the water body from the outside of the water body, thereby ensuring the isolation of the laser light source from the water body and improving the use safety of the laser light source.

Description

A kind of sterilizing method and sterilizing device for water body

Technical field:

The invention belongs to the technical field of water body sterilization, and in particular relates to a water body sterilization method and a sterilization device.

Background technique:

When people need to sterilize water bodies, they usually use chemical methods, such as tap water and sewage regeneration, that is, chlorine dioxide is used for sterilization and disinfection. Although this method can remove bacteria inside the water body, it will leave a lot of water in the water body Free residual chlorine causes peculiar smell in the water body and affects the use. And there are various research results to show that free residual chlorine in tap water is harmful to human body, therefore, it is necessary to find a safer bactericidal method for water body.

In the field of sterilization technology, in addition to chemical methods, ultraviolet sterilization is also well known to ordinary people. Ultraviolet sterilization is usually used in a closed space to sterilize objects inside the space, such as disinfection cabinets. The light source that emits ultraviolet rays is usually a mercury lamp. , xenon lamp, and ultraviolet LED lamp beads all have shortcomings. Mercury lamps output a variety of light wavelengths, and the energy of light within the effective sterilizing wavelength range is extremely low, and the light attenuates significantly during the propagation process, and mercury is poisonous, posing safety hazards ; Xenon lamps and ultraviolet LED lamp beads emit divergent light, which has low light energy, short transmission distance, and serious energy waste. Since the ultraviolet light emitted by the above-mentioned light sources for ultraviolet sterilization has defects such as low energy and scattering, the sterilization efficiency is low.

In order to improve the efficiency of the use of ultraviolet rays emitted by scattered light sources, an invention patented as an ultraviolet sterilizer (patent number: ZL201721197578.6) discloses a technical solution for disinfecting water using ultraviolet rays. In this solution, ultraviolet lamps are used to install inside the cylinder, and then let the water flow through the inside of the cylinder, and sterilize the flowing water through the ultraviolet rays emitted by the ultraviolet lamp tube. Scaling leads to a decrease in sterilization efficiency, high requirements for the sealing connection between the lamp tube and the cylinder body, and there is a hidden danger of water leakage in long-term use. The length of the ultraviolet lamp tube limits the length of the cylinder body, and the ultraviolet energy decays rapidly with the increase of the propagation distance. The inner diameter of the cylinder is limited, so the internal volume of the cylinder is small and the sterilization efficiency is low. It is actually difficult to effectively kill bacteria in the water during the flow process, so this technical solution still has many defects.

Invention content:

The technical problem to be solved by the present invention is: to provide a sterilizing method for water body, which can make the light source be placed outside the water body, thereby improving the safety of the laser light source; at the same time, it can also improve the sterilization efficiency, even if the water flow speed is fast. There is enough time to complete the effective killing of bacteria in the water body.

In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is: a sterilization method for water bodies, which uses a laser light source to emit a laser beam that can kill bacteria, and guides the beam into the water body to sterilize the water body.

As a preferred solution, a beam expander is used to amplify the laser spot so as to fully irradiate the water body.

As a preferred solution, the energy of the laser beam is increased to increase the propagation distance of the laser in the water body and expand the sterilization range.

As a preferred solution, the water body is guided to flow for at least a certain distance along the propagation direction of the laser beam.

As a preferred solution, the water body flows along the propagating direction of the laser beam within the spot range of the laser beam.

The further technical problem to be solved by the present invention is to provide a sterilizing device for water bodies, which can make the light source placed outside the water body to simplify the structure of the sterilizing device; meanwhile, it can also improve the sterilizing efficiency, and can have sufficient water flow even if the water flow speed is fast. The time to complete the effective killing of bacteria in the water.

In order to solve the above technical problems, the technical solution adopted in the present invention is: a sterilizing device for water bodies, including a sterilizing chamber for containing the water body and a laser light source, the laser light source emits laser light that can kill bacteria, and the sterilizing chamber There is a sterilizing cavity inside, and a transparent incident part is set on the warehouse wall at one end of the sterilizing cavity. The laser light source is located outside the sterilizing cavity and opposite to the incident part. The laser light emitted by the laser light source enters the sterilizing cavity through the incident part. Sterilize.

As a preferred solution, the sterilizing cavity is columnar, the incident part covers the entire end surface of one end of the sterilizing cavity, and a beam expander is arranged between the incident part and the laser light source, and the beam expander can expand the laser spot to not less than The size of the end face of the sterilization chamber, the light spot covers the entire end face of the sterilization chamber, and the laser propagation direction is parallel to the axis of the sterilization chamber.

As a preferred solution, a liquid inlet connected to the sterilization chamber is connected to a position close to the incident part on the sterilization chamber, and a liquid outlet connected to the sterilization chamber is opened at a position far from the incident part of the sterilization chamber.

As a preferred solution, the laser light source emits a deep ultraviolet laser with a wavelength of 263-266 nm.

The beneficial effects of the present invention are: the present invention utilizes laser to sterilize, because the divergence of the laser beam is extremely small, the laser light source can inject all the laser light into the water body from the outside of the water body, thereby ensuring the isolation of the laser light source from the water body and improving the use safety of the laser light source sex.

In the present invention, the beam expander is used to expand the laser spot to enlarge the laser irradiation area, and the laser power is increased to enhance the sterilization efficiency, which can further improve the sterilization effect.

The invention further guides the water body to flow for a certain distance along the propagation direction of the laser beam, so that the water body can be continuously irradiated by the laser during the flow process, prolongs the time for the local water body to be irradiated by the laser beam, and improves the sterilization effect.

The high-power laser beam can spread several meters or even tens of meters in the water body, and the water flowing through the area irradiated by the laser beam can be fully and long-term sterilized, and the sterilizing effect is outstanding.

Description of drawings:

The specific embodiment of the present invention is described in further detail below in conjunction with accompanying drawing, wherein:

Fig. 1 is a schematic structural view of the sterilization device of the present invention.

In Fig. 1: 1. Sterilization chamber, 2. Laser light source, 3. Sterilization chamber, 4. Incidence part, 5. Beam expander, 6. Liquid inlet, 7. Liquid outlet, 8. Delivery pipeline.

Detailed ways:

Specific embodiments of the present invention are described in detail below.

Example 1:

A sterilizing method for water bodies, which adopts a laser light source to emit laser beams capable of killing bacteria, and guides the beams into water bodies to sterilize the water bodies. The laser beam that can kill bacteria is usually an ultraviolet laser with a wavelength of 100-400nm, preferably an ultraviolet laser with a wavelength of 260-270nm, which has the best sterilization efficiency. However, in addition to ultraviolet lasers, if lasers of other wavelengths are proven to be effective in killing certain bacteria in water, this method can also be used to kill corresponding bacteria in water.

The laser light source can be a finished laser or a pump source, preferably a laser. The laser light can be guided into the water body through the reflector, and can also be irradiated directly into the water body from the laser light source.

The divergence of the laser is extremely small, so it is difficult to fully irradiate the entire water body, and there will be a problem that most water bodies cannot be irradiated with the laser. In this embodiment, a beam expander can be further used to enlarge the laser spot to realize the water body For comprehensive irradiation, after using a beam expander, the spot can be expanded as needed, so that the laser can irradiate the entire water body and fully sterilize the water body.

In this embodiment, the energy of the laser beam can be further increased to increase the propagation distance of the laser in the water body and expand the sterilization range. At the same time, the laser power per unit area can also be increased, and the sterilization efficiency can also be improved. Methods to increase the energy of the laser beam include but are not limited to: increasing the pumping power, such as increasing the current of the semiconductor laser, increasing the pumping power of the solid-state laser; setting the Q-switching switch in the laser resonator to compress the laser pulse width to increase the laser power . The method for increasing the energy of the laser beam that is recognized as common knowledge or has been disclosed before the filing date of this patent belongs to the protection scope of the present invention.

In this embodiment, the water body can be further guided to flow along the propagation direction of the laser beam for at least a certain distance, and the water body is continuously irradiated by the laser light while flowing along the propagation direction of the laser beam. Ways to guide water flow include but are not limited to pipeline drainage and gravity drainage. Pipeline drainage uses a pipeline to guide the water body to flow along the direction of laser propagation, but the pipeline needs to be provided with an incident part that allows the laser to penetrate into the interior of the pipeline, while gravity drainage That is, under the action of gravity, the water body falls vertically from a high place to a low place, and the propagation direction of the laser is set to be vertical, so that the laser travels a certain distance in the water body and continuously sterilizes the water body during the flow.

Since the laser divergence is extremely small and the straight-line irradiation distance is long, guiding the water body to flow along the laser beam propagation direction for a certain distance can make the water body continue to be irradiated by the laser during the flow process, continuous sterilization and disinfection, and also provide ultraviolet laser sterilization for water supply pipelines The theoretical basis of disinfection enables the method of the present invention to be applied to the field of water supply pipeline sterilization.

While guiding the water body to flow along the propagation direction of the laser beam, control the water body to flow within the spot range of the laser beam, so that the entire flowing water body can be fully irradiated by the ultraviolet laser, so that the water body can be fully sterilized during the flow process. The light beam travels a long distance, so the water body flows in the laser irradiation range for a long time, and sufficient time can be obtained for sterilization and disinfection.

Example 2:

A kind of sterilizing device for water body as shown in Figure 1, comprises a sterilizing chamber 1 and a laser light source 2 for accommodating water body, in the present embodiment, sterilizing chamber 1 is a straight pipe with a circular section, in In the concrete implementation process, also can adopt the straight pipe or the curved pipe of rectangular section, laser light source 2 emits the laser that can kill bacteria, is usually ultraviolet laser, and wavelength is 100～400nm, and preferred wavelength is 260～270nm, of course, as As mentioned in Example 1, if lasers with other wavelengths are proven to be effective in killing certain bacteria in the water body, they can also be applied to this sterilization device to kill the corresponding bacteria in the water body. The sterilization chamber 1 is provided with a sterilization cavity 3 inside. There is no special requirement for the shape of the sterilization cavity 3, and any shape is acceptable. In this embodiment, a cylindrical sterilization cavity 3 is preferably used, which is more conducive to the propagation of the laser beam and reduces the laser beam. reflection, prolong the laser propagation distance, and expand the volume of the irradiated water body. The chamber wall at one end of the sterilization chamber 3 is provided with a transparent incident portion 4, which can be integrally formed with other parts of the chamber wall, or can be a lens or glass embedded in a pre-opened hole on the chamber wall. The laser light source 2 is located outside the sterilizing chamber 3 and opposite to the incident part 4 , and the laser light emitted by the laser light source 2 enters the sterilizing chamber 3 through the incident part 4 to sterilize the water body in the sterilizing chamber 3 .

In this embodiment, since the preferred sterilizing chamber 3 is cylindrical, in order to further increase the propagation distance of the laser beam, the laser beam is set to be parallel to the axis of the sterilizing chamber 3. The length direction is extended without being blocked by the cavity wall, and can reach the farthest distance that the light beam propagates in the water body. The farther the light beam travels, the larger the volume of the water body is irradiated, and the better the sterilization effect of the laser on the water body.

In this embodiment, the incident part 4 covers the entire end surface of one end of the sterilization chamber 3, and a beam expander 5 is arranged between the incident part 4 and the laser light source 2, and the beam expander 5 can expand the laser spot to be no smaller than the sterilization chamber 3. The size of the end face, the light spot covers the entire end face of the sterilization chamber 3, the laser propagation direction is kept parallel to the axis of the sterilization chamber 3, so that the laser can fill the entire length of the sterilization chamber 3, and the water body within the range of the sterilization chamber 3 irradiated by the laser All are fully sterilized, so that there is no dead angle for sterilization.

If the water body in the sterilization chamber 3 is a still water body, the length of the sterilization chamber 3 can be set according to the actual situation, and it is advisable that the laser beam can be fully irradiated.

However, as shown in this embodiment, the liquid inlet 6 communicating with the sterilization chamber 3 is connected to the position close to the incident portion 4 on the sterilization chamber 1, and the liquid outlet 6 communicated with the sterilization chamber 3 is provided at a position far away from the incident portion 4 of the sterilization chamber 1. In this way, the liquid inlet 6 and the liquid outlet 7 can be used to make the liquid in the sterilization chamber 3 flow, and the water body can choose to circulate to carry out cycle sterilization, and can also choose one-way flow to carry out the water body flowing through the sterilization chamber 3. Fully sterilize.

The sterilization chamber 1 provided with the liquid inlet 6 and the liquid outlet 7 can be applied to the sterilization of tap water and flowing water, and the sterilization chamber 1 can be connected in series in the water delivery pipeline 8, so that the water enters the sterilization chamber 3 from the liquid inlet 6 Inside, flow along the propagation direction of the laser beam to the liquid outlet 7 to discharge the sterilization chamber 3, and the water body can be continuously irradiated by the laser during the flow process in the sterilization chamber 3. Since the laser beam has a long propagation distance, the water body can be irradiated by the laser beam during the flow process. The irradiation time is long, and because the energy attenuation of the laser beam is extremely small during the propagation process, the entire water body irradiated by the laser is basically indiscriminately sterilized, and the sterilizing effect is far better than the traditional ultraviolet light sterilized by the ultraviolet lamp. Effect.

The laser light source 2 emits a deep ultraviolet laser with a wavelength of 263-266nm, and the sterilization efficiency of this deep ultraviolet laser is the highest.

The working process of this embodiment 2 is: as shown in Figure 1, the water body enters in the sterilization chamber 3 from the liquid inlet 6 through the delivery pipeline 8, and the laser light source 2 emits a deep ultraviolet laser with a wavelength of 263-266nm, and the deep ultraviolet laser first Irradiated to the beam expander 5 , under the action of the beam expander 5 , the originally small laser spot is expanded to cover the entire end surface of the sterilization chamber 3 . The laser beam passes through the transparent incident part 4 into the cylindrical sterilization chamber 3 and continues to propagate forward along the axis of the sterilization chamber 3 until it is completely attenuated or blocked. In the range of the laser beam propagation, any The water body on the longitudinal section is sterilized indiscriminately by the laser, so the sterilization efficiency is high and the bacteria killing effect in the water body is uniform. Lumen 3 again enters delivery line 8 .

The intensity of the laser power and the axial length of the sterilizing chamber 3 can be determined according to the water body flow velocity and the laser irradiation time required for the bacteria in the water to be effectively killed. The axial length of the sterilizing chamber 3 meets the water body flowing through the laser irradiation area. The time is not less than the time required for laser irradiation to effectively kill bacteria in the water.

In this embodiment, the liquid outlet 7 and the incident part 4 are preferably located at both ends of the sterilizing chamber 3, so that when the axial length of the sterilizing chamber 3 is less than the maximum distance of laser beam propagation, the laser can enter the delivery port 7 through the liquid outlet. In the pipeline, although the pipeline may be curved, the laser can also advance or retreat in the form of reflection inside the pipeline. No matter how it propagates, the laser is still sterilizing and disinfecting in the water until it is completely attenuated.

Above-mentioned embodiment only illustrates the principle of the present invention and its effect, and the embodiment of partial use, and is not intended to limit the present invention; Under the premise of the concept, several modifications and improvements can also be made, which all belong to the protection scope of the present invention.

Claims (9)

1. A sterilization method for water bodies is characterized in that a laser light source is adopted to emit laser beams capable of killing bacteria, and the laser beams are guided into the water bodies to sterilize the water bodies.

2. The sterilization method according to claim 1, wherein the beam expander is used to amplify the laser spot to achieve full irradiation of the water body.

3. The sterilization method according to claim 1, wherein the energy of the laser beam is increased to increase the distance of the laser beam propagating in the water body, thereby expanding the sterilization range.

4. The sterilization method according to any one of claims 1 to 3, wherein the water body is guided to flow for a distance at least along the propagation direction of the laser beam, and the water body is continuously irradiated by the laser while flowing along the propagation direction of the laser beam.

5. The sterilization method according to claim 4, wherein the water body flows in a propagation direction of the laser beam within a spot range of the laser beam.

6. the utility model provides a sterilizing equipment to water, its characterized in that, including one storehouse (1) and a laser light source (2) of disinfecting that is used for holding the water, laser light source (2) transmission can kill the laser of bacterium, storehouse (1) inside of disinfecting is provided with chamber (3) of disinfecting, is provided with transparent incident portion (4) on the bulkhead of chamber (3) one end of disinfecting, and laser light source (2) are located and disinfect chamber (3) outer and relative with incident portion (4), and the laser of laser light source (2) transmission is disinfected to the water in the chamber (3) of disinfecting in getting into through incident portion (4).

7. the sterilization apparatus according to claim 6, wherein the sterilization chamber (3) is cylindrical, the incident portion (4) covers the entire end surface of one end of the sterilization chamber (3), a beam expander (5) is disposed between the incident portion (4) and the laser source (2), the beam expander (5) can expand the laser spot to a size not smaller than the end surface of the sterilization chamber (3), the spot covers the end surface of the entire sterilization chamber (3), and the laser propagation direction is parallel to the axial direction of the sterilization chamber (3).

8. The sterilization apparatus according to claim 6, wherein a liquid inlet (6) communicated with the sterilization chamber (3) is connected to the sterilization chamber (1) at a position close to the incident portion (4), and a liquid outlet (7) communicated with the sterilization chamber (3) is provided at a position far away from the incident portion (4) of the sterilization chamber (1).

9. The sterilization apparatus according to claim 6, wherein the laser light source (2) emits deep ultraviolet laser with a wavelength of 263-266 nm.