CN101380483B

CN101380483B - Photocatalysis air cleaning device

Info

Publication number: CN101380483B
Application number: CN2008102185401A
Authority: CN
Inventors: 江帆
Original assignee: Guangzhou University
Current assignee: Guangzhou University
Priority date: 2008-10-22
Filing date: 2008-10-22
Publication date: 2012-04-18
Anticipated expiration: 2028-10-22
Also published as: CN101380483A

Abstract

The invention discloses a photocatalysis air purifying device which comprises a gas-solid fluidized bed, a catalyst carrier and an ultraviolet light source and is characterized in that the gas-solid fluidized bed consists of a spiral pipe (1) and a backflow pipe (2), wherein, the lower end of the spiral pipe (1) is provided with an inlet (1-2), and the upper end is provided with an outlet (1-1); the backflow pipe (2) is vertically arranged outside the spiral pipe (1), the upper end of the backflow pipe (2) is communicated with the spiral pipe (1) through the outlet (1-1), and the lower end is communicated with the inlet (1-2) of the spiral pipe (1); the cross section of the spiral pipe (1) takes the shape of C, and an opening of the C-shaped cross section faces to the ultraviolet light source and is sealed by a hood of the ultraviolet light source; the catalyst carrier (5) is arranged in the gas-solid fluidized bed and is naturally precipitated at the inlet (1-2) of the spiral pipe (1); the ultraviolet light source is distributed on the axes of the spiral pipe (1), and ultraviolet rays are radiated into the spiral pipe by passing through the hood of the ultraviolet light source.

Description

A kind of photocatalysis air cleaning device

Technical field

The present invention relates to the technical field of the purification of air, be specifically related to a kind of device that utilizes physical phenomenon to purify air.

Background technology

Be faced with more and more serious air pollution, the healthy of people is on the hazard, and purifying air is the important measures of protection health and living environment.Air purification method is more, and common have adsorption cleaning, Athermal plasma purifying, light catalytic purifying, anion fine-purification, an ozone purification etc., and wherein the light catalytic purifying method more and more receives people's attention.

In the existing PHOTOCATALYTIC AIR-PURIFYING technology; Reaction vessel so that immobilized photocatalysis carrier and uviol lamp are the basis is in the majority, is 03128735.2 Chinese patent like the patent No., discloses a kind of area source photocatalysis air purification and disinfection apparatus; Cellular supporting structure or the staggered louver structure of air through scribbling the nanoscale catalysis material; Under the area source effect, be purified, the photocatalyst of this photo catalysis reactor is the surface that is coated in supporting structure or louver structure, transfixion; Exist photocatalyst and contaminated air short time of contact, the deficiency that contact surface is little.Carrying out on this basis that improved fluidized bed photo catalysis device helps improving photocatalyst and dusty gas time of contact and contact surface is long-pending, is 200410051984.2 Chinese patent like application number, discloses a kind of gas-solid fluidized bed photocatalytic equipment; Have heat transfer, mass-transfer efficiency height; Realization response thing, catalyst fully contact with incident illumination better, have improved photocatalysis efficiency, do not wait the formed interlayer of cylinder but its fluid bed is two diameters; And gas is established a side of said interlayer; Therefore being processed air will inevitably make the part air in fluid bed, can not fully contact with photocatalyst at said interlayer internal short-circuit, and effect is obviously not good enough.In order further to improve the photocatalysis effect, application number is the Chinese patent of 200810017710.X, discloses a kind of magnetically reinforced photocatalysis wind wheel and air purification method.The described technical scheme of this application for a patent for invention is under photocatalysis and magnetic field synergism; Improved photocatalysis efficiency; Simultaneously clean-up effect is improved, but the spatial cross section that the blade on the wherein said wind wheel forms is a triangle, being processed air and can't fully contacting in this space with set nano-photocatalyst in the blade by hyperacoustic cavitation effect; Although magnetic field and hyperacoustic assosting effect are arranged, its clean-up effect is still undesirable.

Summary of the invention

In view of existing in prior technology is not enough, technical problem to be solved by this invention is to prolong the time of contact that is cleaned air and photocatalyst and improve the uniformity that contacts between the two, with further raising clean-up effect.

The technical scheme that the present invention addresses the above problem is:

That a kind of photocatalysis air cleaning device, this device comprise is gas-solid fluidized bed, catalyst carrier and ultraviolet light source, it is characterized in that,

Described gas-solid fluidized bedly be made up of helical pipe and reflux line, wherein, the lower end of described helical pipe is import, and the upper end is outlet; Described reflux line vertically is located at the outside of helical pipe, and the upper end is communicated with helical pipe by the downside of the outlet of helical pipe, and the lower end is communicated with the import of helical pipe; The cross section of described helical pipe is the C type, and the opening of this C type cross section is towards a side of ultraviolet light source, and by the case sealing of ultraviolet light source;

Described catalyst carrier be located at gas-solid fluidized bed in, natural subsidence is in the import of said helical pipe;

Described ultraviolet light source is distributed on the axle center of helical pipe, and ultraviolet sees through the case radiation of said ultraviolet light source to helical pipe.

Above-mentioned photocatalysis air cleaning device, wherein, described ultraviolet light source can be commercially available straight tube ultraviolet light, also can be the serpentine pipe ultraviolet light.When selecting the straight tube ultraviolet light for use, fluorescent tube can be along the inwall annular spread of helical pipe; When adopting the serpentine pipe ultraviolet light, described helical pipe forms along the fluorescent tube outside, promptly uses the opening of the C type cross section on the direct sealing screw pipeline in lateral wall of fluorescent tube, thereby reduces ultraviolet attenuation.

Above-mentioned photocatalysis air cleaning device, wherein, described catalyst carrier can directly be selected common alumina support and silica-gel carrier for use, also can adopt absorbent charcoal carrier and some natural product such as the Pumex and the kieselguhr etc. of mechanical strength improvement.Described catalyst carrier is preferably processed graininess, to improve its flowability in gas-solid fluidized bed.The catalyst that is adhered on the described catalyst carrier can be selected according to being cleaned harmful components contained in the air; As be cleaned and contain methanol, acetone, dichloromethane etc. in the air; Selective light catalyst titanium dioxide then, these all are the general knowledge that those of ordinary skills know.

For the ease of upgrading described catalyst carrier; In the device according to the invention; The intersection of attending that constitutes gas-solid fluidized bed helical pipe and reflux line is connected in series the inlet that adds of a catalyst carrier through a valve, and the following intersection that constitutes gas-solid fluidized bed helical pipe and reflux line is connected in series the outlet of a catalyst carrier through another valve.

Efficient for the light-catalyzed reaction that improves device according to the invention; Helical pipe described in the such scheme also is provided with magnetic line of force producing component outward; This element can be to be evenly distributed on gas-solid fluidized bed permanent magnetic strip all around; Magnetizing coil preferably is so that according to the flow that is cleaned air and be cleaned harmful components adjustment magnetic field intensity contained in the air.When described magnetic line of force producing component was magnetizing coil, described reflux line was located at the outside of magnetizing coil, to reduce the gap between magnetizing coil and the helical pipe, improved the magnetic field intensity in the helical pipe.In order to guarantee that the magnetic power that magnetic line of force producing component is produced acts on the air that is cleaned in it through helical pipe, described helical pipe can adopt attrition resistant non-magnet material such as rustless steel to make.

Photocatalysis air cleaning device of the present invention; As required can also be at the outlet serial connection cleaner unit of described helical pipe; This dust-precipitator can be the one-level cyclone dust extractor; Also can be the one-level sack cleaner, can also be that the placed in-line multistage rotary dust collector of cyclone dust extractor and sack cleaner or other can be collected the various cleaner units of dust.

Photocatalysis air cleaning device of the present invention, the import of wherein said helical pipe also can be connected in series a blower fan, makes whole system integrated, so that Installation and Debugging.

Photocatalysis air cleaning device of the present invention; After being cleaned the import entering helical pipe of air by helical pipe; Catalyst carrier just arrives the outlet of helical pipe along helical pipe under action of air pressure; Suitable said reflux line is back to the import of helical pipe by the effect of deadweight, and air is then discharged by the outlet of helical pipe.The catalyst carrier that is back to the import of helical pipe is carried into the outlet of helical pipe again by the air of new entering, be back to the import of helical pipe through reflux line.Circulation so constantly realizes photo catalyzed air purifying under the effect of ultraviolet light source.This shows; Device according to the invention will be cleaned air mobile path in gas-solid fluidized bed on the one hand and prolong greatly; Be cleaned on the other hand air in gas-solid fluidized bed, mix with catalyst carrier all the time in the process of flowing follow mobile; Thereby prolong the time of contact be cleaned air and photocatalyst and improve the uniformity that contacts between the two, accomplished the invention task of further raising clean-up effect well.

Description of drawings

Fig. 1 is the structural representation of a specific embodiment of light catalytic purifying device of the present invention.

Fig. 2 is the structural representation of the cross section of helical duct among Fig. 1.

Fig. 3 is the structural representation of the another specific embodiment of light catalytic purifying device of the present invention.

Fig. 4 is that the A of Fig. 3 is to view.

Fig. 5 is the structural representation of the cross section of helical duct among Fig. 3.

Fig. 6 sets up the structural representation of the specific embodiment of electromagnetic field for light catalytic purifying device of the present invention.

Fig. 7 sets up the structural representation of the specific embodiment of permanent-magnetic field for light catalytic purifying device of the present invention.

Fig. 8 is the structural representation of the integrated specific embodiment of light catalytic purifying device of the present invention.

The specific embodiment

As depicted in figs. 1 and 2, present embodiment middle-ultraviolet lamp light source is selected serpentine pipe ultraviolet light 3 for use, and it is wound on the support column 7; The cross section of helical duct 1 is the C type; The helical angle of its spirillum part equates with the helical angle of the spirillum part of serpentine pipe ultraviolet light 3; Just in time serpentine pipe ultraviolet light 3 is stuck in the opening of its C type cross section, by the opening sealing (referring to Fig. 2) of the outer wall of serpentine pipe ultraviolet light 3 C type cross section; Reflux line 2 vertically is located at the outside of helical duct 1, and the upper end is communicated with helical pipe 1 by the downside of the outlet 1-1 of helical pipe 1, and the lower end is communicated with the import 1-2 of helical pipe 1; The catalyst carrier 5 that is placed on the import 1-2 of helical pipe 1 is granular silica-gel carrier, is coated with titanium dioxide optical catalyst on it; The intersection of attending that constitutes gas-solid fluidized bed helical pipe 1 and reflux line 2 enters the mouth 9 through adding of a valve 8 serial connections one catalyst carrier 5, constitutes the outlet 10 of the following intersection of gas-solid fluidized bed helical pipe 1 and reflux line 2 through other valve 8 serial connections one catalyst carrier 5.

Shown in Fig. 3～5; Present embodiment middle-ultraviolet lamp light source is selected straight tube ultraviolet light 11 for use; It evenly is arranged in the inwall of a transparent cylindrical drum 12, and helical duct 1 closely is enclosed within the outer wall of cylindrical drum 12, by the opening sealing (referring to Fig. 5) with the C type cross section of helical duct 1 of the outer wall of cylindrical drum 12.Implementation method beyond this example is above-mentioned is with embodiment illustrated in fig. 1 identical.

As shown in Figure 6, this example is come light for the Zeemen effect of utilizing the electromagnetism place to produce and is improved the embodiment of catalytic efficiency.This routine specific embodiments is: on basis embodiment illustrated in fig. 1, have additional magnetizing coil 4; This coil is set in the outside of helical duct 1; Be fixed on the helical duct 1 by buckle 6, reflux line 2 is communicated with outlet 1-1 with the import 1-2 of helical duct 1 by the outside of magnetizing coil 4 from top to bottom; Helical duct 1 described in this example adopts the rustless steel of non-magnetic conduction to make, so that the magnetic line of force that magnetizing coil 4 is produced can act in the gas channel of helical duct 1.

As shown in Figure 7, this example is come light for the Zeemen effect of utilizing the permanent magnetism place to produce and is improved the embodiment of catalytic efficiency.This routine specific embodiments is: on basis embodiment illustrated in fig. 3, have additional permanent magnetic strip 13; This magnetic stripe evenly is arranged in the outside of helical duct 1; Be adhesively fixed on by binding agent on the outer wall of helical duct 1, reflux line 2 is communicated with outlet 1-1 with the import 1-2 of helical duct 1 by the outside of permanent magnetic strip 13 from top to bottom; Helical duct 1 described in this example adopts the rustless steel of non-magnetic conduction to make, so that the magnetic line of force that permanent magnetic strip 13 is produced can act in the gas channel of helical duct 1.

By shown in Figure 8, this example is a kind of integrated equipment of photocatalysis air cleaning device of the present invention, and it is to improve on the basis embodiment illustrated in fig. 6 to obtain.Specifically be improved to: be connected in series a blower fan 14 at the import 1-2 of helical pipe 1, outlet 1-1 is connected in series a cyclone dust extractor 15, then all placed in-line assemblies is installed concentratedly in shell 16, and said blower fan 14 and cyclone dust extractor 15 all are fixed on the inboard of shell 16.

Claims

1. photocatalysis air cleaning device, that this device comprises is gas-solid fluidized bed, catalyst carrier and ultraviolet light source, it is characterized in that,

Described gas-solid fluidized bedly be made up of helical pipe (1) and reflux line (2), wherein, the lower end of described helical pipe (1) is import (1-2), upper end outlet (1-1); Described reflux line (2) vertically is located at the outside of helical pipe (1), and the upper end is communicated with helical pipe (1) by the downside of the outlet (1-1) of helical pipe (1), and the lower end is communicated with the import (1-2) of helical pipe (1); The cross section of described helical pipe (1) is the C type, and the opening of this C type cross section is towards a side of ultraviolet light source, and by the case sealing of ultraviolet light source;

Described catalyst carrier (5) be located at gas-solid fluidized bed in, natural subsidence is in the import (1-2) of said helical pipe (1);

Described ultraviolet light source is distributed on the axle center of helical pipe (1), and ultraviolet sees through the case radiation of said ultraviolet light source to helical pipe;

After being cleaned the import entering helical pipe (1) of air by helical pipe (1); Catalyst carrier under action of air pressure (5) just arrives the outlet of helical pipe (1) along helical pipe (1); Suitable said reflux line (2) is back to the import of helical pipe (1) by the effect of deadweight, and air is then discharged by the outlet of helical pipe (1).

2. a kind of photocatalysis air cleaning device according to claim 1 is characterized in that described ultraviolet light source is serpentine pipe ultraviolet light (3), and the opening of the C type cross section of helical pipe (1) is directly sealed by the lateral wall of serpentine pipe ultraviolet light (3).

3. a kind of photocatalysis air cleaning device according to claim 1; It is characterized in that described ultraviolet light source is straight tube ultraviolet light (11); This straight tube ultraviolet light (11) evenly is arranged in the inwall of a transparent cylindrical drum (12); Helical pipe (1) closely is enclosed within the outer wall of cylindrical drum (12), by the opening sealing with the C type cross section of helical pipe (1) of the outer wall of cylindrical drum (12).

4. according to claim 1,2 or 3 described a kind of photocatalysis air cleaning devices, it is characterized in that described helical pipe (1) is made by non-magnet material, its outside also is provided with magnetic line of force producing component, and this element is magnetizing coil (6).

5. a kind of photocatalysis air cleaning device according to claim 4; It is characterized in that constituting gas-solid fluidized bed helical pipe (1) and reflux line (2) attend intersection through a valve (8) serial connection one catalyst carrier (5) add inlet (9), the following intersection that constitutes gas-solid fluidized bed helical pipe (1) and reflux line (2) passes through the outlet (10) that another valve (8) is connected in series a catalyst carrier (5).

6. a kind of photocatalysis air cleaning device according to claim 5 is characterized in that the outlet (1-1) of described helical pipe (1) is serially connected with cleaner unit (15), import (1-2) serial connection one blower fan (14).