CN101380483A

CN101380483A - Photocatalysis air cleaning device

Info

Publication number: CN101380483A
Application number: CNA2008102185401A
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: 2009-03-11
Anticipated expiration: 2028-10-22
Also published as: CN101380483B

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 is subject to people's attention.

In the existing PHOTOCATALYTIC AIR-PURIFYING technology, reactor based on immobilized photocatalysis carrier and uviol lamp is in the majority, it as the patent No. 03128735.2 Chinese patent, a kind of area source photocatalysis air purification and disinfection apparatus is disclosed, cellular supporting structure or the staggered louver structure of air by 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.Carry 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, it as application number 200410051984.2 Chinese patent, a kind of gas-solid fluidized bed photocatalytic equipment is disclosed, has heat transfer, the mass-transfer efficiency height, realization response thing better, catalyst fully contacts with incident illumination, improved photocatalysis efficiency, but its fluid bed is two diameters does not wait the formed interlayer of cylinder, and gas is established a side of described interlayer, therefore processed air will inevitably be at described interlayer internal short-circuit, make the part air can not fully contact with photocatalyst in fluid bed, 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 by hyperacoustic cavitation effect, but the spatial cross section that the blade on the wherein said wind wheel forms is a triangle, processed air in this space can't fully contact with set nano-photocatalyst in the blade, although magnetic field and hyperacoustic assosting effect are arranged, its clean-up effect is still undesirable.

Summary of the invention

In view of the existing in prior technology deficiency, technical problem to be solved by this invention is to prolong the time of contact be 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 described helical pipe;

Described ultraviolet light source is distributed on the axle center of helical pipe, and the case that ultraviolet sees through described ultraviolet light source is radiated in the 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 made graininess, to improve its flowability in gas-solid fluidized bed.Catalyst accompanying 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 of the present invention, the last intersection that constitutes gas-solid fluidized bed helical pipe and reflux line is connected in series the inlet that adds of a catalyst carrier by 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 by another valve.

Efficient for the light-catalyzed reaction that improves device of the present 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 contained in the air and adjust magnetic field intensity.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 magnetic power that magnetic line of force producing component produced sees through helical pipe and acts on the air that is cleaned in it, 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 of air and entering helical pipe by helical pipe, catalyst carrier just arrives the outlet of helical pipe along helical pipe under action of air pressure, be back to the import of helical pipe along described reflux line by the effect of deadweight, air is then discharged by the outlet of helical pipe.Be back to air that the catalyst carrier of the import of helical pipe newly entered again and be carried into the outlet of helical pipe, be back to the import of helical pipe through reflux line.So constantly circulation realizes photo catalyzed air purifying under the effect of ultraviolet light source.This shows, device of the present 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, finished 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 last intersection that constitutes gas-solid fluidized bed helical pipe 1 and reflux line 2 enters the mouth 9 by 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 by 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 the embodiment of light raising catalytic efficiency for the Zeemen effect of utilizing the electromagnetism place to produce.This routine specific embodiments is: have additional magnetizing coil 4 on basis embodiment illustrated in fig. 1, 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 the import 1-2 and the outlet 1-1 of helical duct 1 from top to bottom by the outside of magnetizing coil 4; 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 the embodiment of light raising catalytic efficiency for the Zeemen effect of utilizing the permanent magnetism place to produce.This routine specific embodiments is: have additional permanent magnetic strip 13 on basis embodiment illustrated in fig. 3, 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 the import 1-2 and the outlet 1-1 of helical duct 1 from top to bottom by the outside of permanent magnetic strip 13; 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 described blower fan 14 and cyclone dust extractor 15 all are fixed on the inboard of shell 16.

Claims

1, 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 (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 (2), 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 described helical pipe (1);

Described ultraviolet light source is distributed on the axle center of helical pipe (1), and the case that ultraviolet sees through described ultraviolet light source is radiated in the helical pipe.

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 duct (1) closely is enclosed within the outer wall of cylindrical drum (12), by the opening sealing with the C type cross section of helical duct (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, the last intersection that it is characterized in that constituting gas-solid fluidized bed helical pipe (1) and reflux line (2) adds inlet (9) by a valve (8) serial connection one catalyst carrier (5), and 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).