CN211677168U

CN211677168U - Novel TiO2Photocatalytic reactor

Info

Publication number: CN211677168U
Application number: CN201921247512.2U
Authority: CN
Inventors: 杨家友
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-25
Filing date: 2019-07-25
Publication date: 2020-10-16
Anticipated expiration: 2029-07-25

Abstract

Novel TiO₂The photocatalytic reactor is a hollow cuboid cavity constructed by plastic, a square fence is constructed on two opposite large faces of a central main cavity, a quartz glass fiber net is arranged on the inner side of the fence, mirror surface aluminum sheets are arranged on the other 4 inner side faces of the fence, light source supports are constructed on two sides of the main cavity, and ultraviolet LED lamp beads are arranged on the fence of the supports. TiO loaded in the main chamber₂The active carbon particles of the nano particles and the light guide body particles made of quartz glass or organic glass are uniformly mixed according to a certain proportion. With two-sided illumination, with guide of light-guiding body and mirror-surface reflection all aroundThe position of the main cavity is crowded and covered without the wrapping of other impurity particles, and TiO in the main cavity₂The particles receive ultraviolet light more uniformly and fully, and the generated photoproduction holes and electrons are on the surface energy of the particles and H coming from the airflow₂O、O₂Continuously carrying out oxidation-reduction reaction with gas pollutant molecules to degrade the gas pollutant into CO₂And H₂And O, realizing real efficient air purification.

Description

Novel TiO2Photocatalytic reactor

Technical Field

The utility model relates to a novel TiO₂A photocatalytic reactor belongs to the air purification technology field, more specifically relates to TiO₂The technical field of photocatalytic air purification.

Background

The photocatalysis technology is one of the current practical air purification technologies. Since 1972 light-irradiated TiO was discovered₂Can be held onSince the oxidation-reduction reaction of water continues to occur, a great deal of intensive research at home and abroad basically proves the mechanism of the photocatalysis. The most common photocatalysts are metal oxides and sulfides, such as TiO₂、ZnO、CdS、WO₃Etc. of which TiO₂Has the best comprehensive performance and the widest application. Now made of TiO₂The photocatalyst briefly describes the mechanism of action as follows: TiO2₂Is a semiconductor material, nano-grade TiO₂The particles have a band structure when subjected to ultraviolet light (energy of which is in combination with TiO) having a wavelength of 387.5nm or less₂Energy with the same forbidden band width) can generate photo-generated holes (h) after being irradiated⁺) And photo-generated electrons (e)^-) The photogenerated holes and electrons rapidly migrate to TiO₂H adsorbed on nanoparticle surface and particle surface₂O and O₂A series of oxidation-reduction reactions are carried out to generate a main component of OH (hydroxyl radical) HO₂(superoxide radical) and O (atomic oxygen) and photogenerated hole (h)⁺) Form a group of high-activity strong oxidant to be adsorbed on TiO₂The harmful gas pollutants on the surfaces of the nanoparticles (including various volatile and semi-volatile organic chemical gases and low-concentration inorganic chemical gases) are deeply oxidized and decomposed to finally generate CO₂And H₂O, and the like. The chemical reaction formula is as follows:

·OH(·HO₂、O、h⁺) + harmful gaseous pollutant → reactive intermediate → CO₂+H₂O+···

Therefore, TiO₂The basic conditions for the photocatalytic redox reaction to be established effectively are:

TiO2 nanoparticles are sufficiently illuminated to generate as many light-generating holes (h) as possible⁺) And electron (e)^-) And the hole-electron recombination rate is sufficiently low and can rapidly migrate to TiO₂The surface of the particles;

2.TiO₂h should be adsorbed on the surface of the nanoparticles at any time₂O、O₂And harmful gas contaminant molecules.

In addition, TiO is selected in practical application₂The immobilization support of the nanoparticle catalyst is also critical. Carrier with excellent performanceAnd the light source utilization rate and the photocatalytic activity of the catalyst can be improved. At present, it is commonly used for TiO₂The carrier of the nanoparticles comprises metal (aluminum, nickel, etc.), AL₂O₃Silica gel, glass fiber, ceramic plate, glass ball, rubber, activated carbon particle, activated carbon fiber, etc. In practical application, in order to mix TiO₂The nanoparticles are immobilized on various supports, often with the addition of organic or inorganic binders. In addition, there are also a number of other semiconducting, insulating particles added, including various terra (e.g., attapulgite, etc.) particles, and even rice hulls, aloe, and other plant pharmaceuticals. Of these mixtures, TiO₂The nano particles are wrapped by a large number of adhesive molecular groups or are extruded and blocked by a large number of particles of other materials, and can not be irradiated by light to a certain extent or not irradiated by light at all to generate holes (h)⁺) And photo-generated electrons (e)^-) The generation of (2) is small. Also due to the wrapping, position crowding and shielding mentioned above, H comes with the air flow₂O、O₂And few molecules of gaseous pollutants are attached or accumulated on the TiO₂On the surface of the nanoparticles, naturally in TiO₂Nanoparticle surface pair H₂O and O₂The oxidation reaction and the oxidative decomposition (degradation) reaction of the gaseous pollutants of (i) are less likely to occur, which makes TiO₂The photocatalytic effect of the nanoparticles is rarely exerted. The actual measurement of TiO is reported in the article which specially introduces the air purifier in hundred degrees encyclopedia in recent years₂The air purifying rate of the photocatalytic air purifier is as low as 3 percent, and preferably less than 5 percent. It follows that TiO has so far been available₂The practical application of photocatalytic air purification has hardly been really solved.

The utility model discloses a novel TiO₂Photocatalytic reactor, the purpose of which is to make TiO₂The nanoparticles are uniformly and sufficiently irradiated with light to build and maintain the nanoparticles in TiO₂The surface of the nano particle is in the surrounding environment of photocatalytic oxidation reduction reaction, so that the photocatalytic efficiency is fully exerted, and harmful gas pollutants in the air are really and effectively purified.

SUMMERY OF THE UTILITY MODEL

The utility model adopts the technical scheme as follows:

novel TiO₂The photocatalytic reactor is characterized in that a hollow cuboid reactor cavity constructed by environment-friendly ABS plastic is characterized in that two corresponding large surfaces of a central main cavity are constructed with a 20mm × 20mm-30mm × 30mm square fence, a quartz glass fiber net is distributed on the inner side surface of the square fence, mirror aluminum sheets are distributed on the inner sides of the other 4 side surfaces of the main cavity and are used as total reflection surfaces of light, light source supports constructed by ABS plastic are respectively arranged on two sides outside the main cavity, one surface of the light source support far away from the main cavity is constructed with a light source support fence × 30mm of 20mm × 20mm-30mm, ultraviolet light LED patch type lamp beads with the wavelength of 365nm and the optical half-power angle of 60-120 degrees are distributed on the cross points of some selected fences on one surface of the main cavity, power wires of the LED lamp beads connected in series on each support fence are distributed along the corresponding fence bars and are respectively distributed with power supply sockets arranged on one side surface of the corresponding light source support, and the two light source support screws connected with the main cavity are set as thick fence surfaces with mechanical connection drawings, and air flows in and flow out in the directions of solid lines;

the reactor main chamber is filled with loaded TiO₂The active carbon particles of the nano particles and the ultraviolet light conductor particles are evenly mixed according to the volume ratio of 3: 1-5: 3 to form a photocatalytic reaction body.

The TiO is₂The nano particles are anatase type TiO₂The grain diameter is 4-6 nm;

the activated carbon particles are phi 3mm cylindrical sections or phi 3mm ball beads made of high-quality coconut shell activated carbon;

the TiO is directly adopted under the condition of not adding any binder and any other substance element and avoiding any impurity element from being added as much as possible by utilizing the strong adsorbability of the activated carbon₂The TiO-loaded active carbon particles are obtained after the suspension liquid mixed by the nano particles and the purified water is soaked in the active carbon particles₂Activated carbon particles of nanoparticles;

the ultraviolet light guide body particles are cylindrical sections with phi 4 mm-phi 5mm or balls with phi 4 mm-phi 5mm, which are made of one of transparent quartz glass, transparent organic glass and natural crystal, and are good light guide bodies of ultraviolet light;

the glass fiber net arranged in the main cavity is made of transparent quartz glass fibers;

the ultraviolet LED patch type lamp bead has the ultraviolet wavelength of 365nm, the power of 1-3W and the ultraviolet half-power angle of 60-120 degrees.

The utility model relates to a novel TiO₂The photocatalytic reactor is provided with ultraviolet light source irradiation on two surfaces of air inflow and air outflow, has the guide of a light guide body in a main cavity chamber and the light total reflection of 4-surface mirror aluminum, almost has no wrapping, extruding and occupying positions and shielding of other impurity element particles and molecular groups, and has TiO in the main cavity chamber₂The nano particles can be irradiated by ultraviolet light from all directions in space, the irradiation is uniform, the ultraviolet light can be fully received, and a large number of photo-generated holes (h) can be continuously generated⁺) And electron (e)^-) Satisfy the above TiO₂A first condition effectively established by the photocatalytic redox reaction. And because the main chamber has a certain thickness (20mm-40mm) in the air flow direction, the main chamber is filled with loaded TiO₂The mixture of the active carbon particles of the nano particles and the ultraviolet light conductor particles ensures that the flow path of the flowing gas is longer, and the flowing gas enters H in the main chamber along with the flowing gas₂O、O₂Is easier to contact, attach and gather with gas pollutant molecules on TiO₂The surface and periphery of the nano-particle satisfy the above TiO₂The second condition effectively established by the photocatalytic redox reaction, thereby continuously realizing the series of reactions of the photocatalytic redox reaction to sufficiently oxidize (degrade) the gaseous pollutants into CO₂And H₂And O. H thus produced₂O may participate in the subsequent oxidative decomposition reaction. Therefore, the utility model relates to a novel TiO₂The photocatalytic reactor can really purify the gas pollutants in the air with high efficiency.

Drawings

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

FIG. 2 is a schematic structural view of the main chamber of the present invention separated from the light source bracket;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;

in the figure, 1, a reactor main chamber; 2a and 2b, and grid fences on two sides of the main chamber; 3a and 3b, two-sided quartz glass fiber mesh; 4. mirror aluminum sheet; 5a and 5b, two pairs of ultraviolet light source brackets; 6a and 6b, and a grid fence of the two secondary light source brackets; 7a and 7b and ultraviolet LED lamp beads on the two auxiliary brackets; 8a and 8b, and LED lamp bead power supply sockets on the two auxiliary brackets; 9. loaded with TiO₂Activated carbon particles of nanoparticles; 10. ultraviolet light guide particles.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings

Example 1

As shown in figure 1, a novel TiO₂The light catalytic reactor comprises a hollow cuboid reactor cavity constructed by environment-friendly ABS plastic, a central main cavity 1, two pairs of square fences 2a and 2b of the main cavity 1, which are 25mm × 25mm square fences, quartz glass fiber nets 3a and 3b distributed on the inner side surfaces of the two pairs of square fences,

support fences

6a and 6b with the width of 20mm × 20mm arranged on the other 4 side surfaces of the main cavity 1, mirror aluminum sheets 4 distributed on the inner side surfaces of the main cavity, light source supports 5a and 5b constructed by the environment-friendly ABS plastic arranged on the two sides of the main cavity, support

fences

6a and 5b with the width of 20mm 3520 mm distributed on the side surfaces of the

supports

5a and 5b far away from the main cavity 1, ultraviolet light

LED lamp beads

7a and 7b distributed on selected fence intersection points on the surfaces of the

support fences

6a and 6b facing the main cavity 1, power lines of the series LED lamp beads on each grid fence are distributed along corresponding fence bars and respectively connected with

power sockets

8a and 8b arranged on one side surface of the

supports

5a and 5b, the patch

type lamp beads

5a and 5b flow along the side surfaces of the

supports

5a and 5b, and the mechanical screws of the supports;

the reactor main chamber 1 is filled with TiO load₂The active carbon particles 9 of the nano particles and the ultraviolet light conductor particles 10 are uniformly mixed according to a certain proportion to form a photocatalytic reactionAnd (4) applying. The total volume ratio of the activated carbon particles 9 to the light guide particles 10 is 5: 2;

the TiO is₂The nano particles are anatase type TiO₂The particle size is 5 nm; the activated carbon particles are cylindrical sections with the diameter of phi 3mm or ball beads with the diameter of phi 3mm, which are made of high-quality coconut shell activated carbon;

the supported TiO₂The active carbon particles 9 of the nano particles are used as [0010 ]]Obtained by the method described in paragraph;

the light guide body particles 10 are cylindrical sections with phi 4 mm-phi 5mm or ball beads with phi 4 mm-phi 5mm made of transparent quartz glass;

the quartz glass fiber nets 3a and 3b are made of transparent quartz glass fibers, and the hole density is 10-15 meshes;

the ultraviolet light wavelength of the ultraviolet light patch

type lamp beads

7a and 7b is 365nm, the power is 1-3W, and the ultraviolet light half-power angle is 120 degrees.

Example 2

This example describes a novel TiO₂The photocatalytic reactor, see fig. 1, is structurally identical to the photocatalytic reactor of example 1 except for the following 6 points:

(1) the two secondary fences 2a and 2b of the reactor main chamber 1 are 20mm multiplied by 20mm fences;

(2) the other 4 sides of the reactor main chamber 1 are 30mm wide;

(3) the lateral width of the

light source brackets

5a and 5b in the air circulation direction is 45 mm;

(4) the light

source support fences

6a and 6b are 25mm multiplied by 25mm square fences;

(5) the ultraviolet light half-power angle of the ultraviolet light LED patch type lamp bead is 60 degrees;

(6) the ultraviolet light guide body is a cylindrical section with phi 4 mm-phi 5mm or a ball with phi 4 mm-phi 5mm made of transparent organic glass.

The above two examples are merely examples of the embodiments of the present invention, and are not limitations of the present invention. The limited scope of the utility model is shown in the claims of the utility model.

Claims

1. Novel TiO₂The photocatalysis reactor is characterized in that a hollow cuboid reactor cavity constructed by environment-friendly ABS plastic is characterized in that two corresponding large surfaces of a central main cavity (1) are constructed with grid fences (2a, 2b) of 20mm × 20mm-30mm × 30mm, quartz glass fiber nets (3a, 3b) are distributed on the inner side surfaces of the grid fences, mirror aluminum sheets (4) are distributed on the inner sides of the other 4 side surfaces of the main cavity (1), light source supports (5a, 5b) constructed by the ABS plastic are respectively arranged on two sides outside the main cavity, light source support fences (6a, 6b) of 20mm × 20mm-30mm × 30mm are constructed on one surfaces of the light source supports (5a, 5b) far away from the main cavity (1), light source support fences (6a, 6b) of ultraviolet light source patch type LED (7a, 7b) of which has the wavelength of 365nm and the light half-angle of 60 degrees are distributed on the surface of the main cavity (1), and power supply lamp beads (5a, 7b) of the LED patch type LED patch lamp beads which are connected with corresponding power supply wires (5a, 5b) of the corresponding LED patch type LED support (5a, 8) are respectively connected with a power source support (5 b) in series, and a power wire socket of the corresponding power source support (5 b) and a, 8 of the corresponding LED patch type fence.

2. The novel TiO of claim 1₂The photocatalytic reactor is characterized in that: TiO is fully filled and loaded in the central main chamber (1)₂The active carbon particles (9) of the nano particles and the ultraviolet light conductor particles (10) are uniformly mixed according to the total volume ratio of 3: 1-5: 3 to form a photocatalytic reaction body.

3. The novel TiO of claim 2₂The photocatalytic reactor is characterized in that: the TiO is₂The nano particles are anatase type TiO₂The particle size is 4-6nm, the activated carbon particles are phi 3mm cylindrical sections or phi 3mm ball beads made of high-quality coconut shell activated carbon, and the TiO is directly adopted under the condition that no binder or any other substance element is added and any impurity element is avoided as much as possible by utilizing the strong adsorbability of the activated carbon₂The TiO-loaded TiO is obtained after the suspension liquid mixed by the nano particles and the purified water is soaked in the activated carbon particles₂Activated carbon particles (9) of nanoparticles.

4. The novel TiO of claim 2₂The photocatalytic reactor is characterized in that: the light guide body particles (10) are cylindrical sections with phi 4 mm-phi 5mm or ball beads with phi 4 mm-phi 5mm, which are made of one of transparent quartz glass, transparent organic glass and natural crystal, and are good light guide bodies with good ultraviolet light or better light guide bodies.