CN1834542A - Indoor air purifier using photocatalytic oxidation process - Google Patents
Indoor air purifier using photocatalytic oxidation process Download PDFInfo
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Abstract
The present invention discloses a photocatalytic oxidizing chamber interior air-cleaning device. It is characterized by that the photocatalytic oxidizing treatment device is formed from 1-5 photocatalytic reaction units; every photocatalytic reaction unit is composed of carrier, honeycomb photocatalyst filter screen using titanium dioxide photocatalyst composite solution as photocatalyst and UV lamp, the distance from photocatalyst filter screen to UV lamp is 0.5-20cm, the photocatalyst is attached to the carrier by adopting impregnation, coating or spraying mode. Said invention can obtain good effect for cleaning air and killing bacteria.
Description
Technical field
The present invention relates to a kind of indoor air purifier using photocatalytic oxidation process.
Technical background
Air is the essential condition of human survival, development.The people has time more than 2/3 in life, spends indoor.The quality of room air is directly connected to people's healthy and life security.In recent years, it was the main path of transmitted virus that room air is regarded as, and indoor environmental pollution is listed in the mankind " ten big killers " blacklist by world environment specialist.Simple use conventional air purified product such as activated carbon, air freshener, formaldehyde scavenger, ultraviolet ray (lamp), negative oxygen ion, ozone all can't reach the purpose that really purifies air.The commerce of utilizing photocatalysis oxidation technique to purify air is used, and arises at the historic moment at home.Chinese patent 03226080.6 disclosed indoor air-purification device, be provided with gas channel, 3-stage dust-removal device, activity carbon filtering device, be solid carrier with nano titanium oxide photocatalyst foamed ceramics, its shortcoming is that the activity and the treatment process of photochemical catalyst is not good enough, and apparatus structure is reasonable inadequately.
The content of invention
The objective of the invention is to exist the activity of photochemical catalyst and treatment process not good enough at existing indoor air purifier, apparatus structure is rational shortcoming inadequately, and a kind of active good photochemical catalytic oxidation indoor air purifier of rational in infrastructure, photochemical catalytic oxidation agent is provided.
For achieving the above object, the present invention adopts following technical scheme: a kind of indoor air purifier using photocatalytic oxidation process is that air guide device, primary filter dust arrester, Treatment by Photocatalysis Oxidation device, circuit board, the control panel of power source formed by casing, with the blower fan;
It is characterized in that:
The primary filter dust arrester by filtering accuracy be 1-5 μ m primary filter net, filtering accuracy be 0.5 in efficient micronic dust screen pack and activated charcoal strainer form;
Air guide device by shutter, go out air door, go out wind scoop, blower fan, air outlet guard board drive unit and casing form, and goes out wind scoop and blower fan and be arranged on before the Treatment by Photocatalysis Oxidation device, air enters the Treatment by Photocatalysis Oxidation device through going out wind scoop and blower fan;
The Treatment by Photocatalysis Oxidation device is made of 1-5 photocatalytic reaction unit; Each photocatalytic reaction unit is a carrier by foamed ceramics, foam metal or with compound last layer porous, inorganic medium in advance and the foamed plastics that adopts metal or plastics to make frame, photocatalyst of titanium dioxide composite solution photocatalyst (catalyst) with Chinese patent 200410026456.1, the aperture is 0.5-4mm, thickness is that cellular photocatalyst filtering net and the uviol lamp of 5-20mm formed, photocatalyst filtering net is in two sides of uviol lamp, uviol lamp is 1-5, and the distance of photocatalyst filtering net and uviol lamp is 0.5-20cm;
Attached on the carrier, the number of times of dipping, coated or spraying is 1-10 time to photochemical catalyst with dipping, coated or spraying method, then at 20-180 ℃ of dry 20-180min;
Be provided with negative ion generating device in the device.
Describedly go out wind scoop and blower fan can be arranged on after the Treatment by Photocatalysis Oxidation device, air is discharged through going out wind scoop and blower fan after Treatment by Photocatalysis Oxidation again.
The preparation method of the photocatalyst of titanium dioxide composite solution of described Chinese patent 200410026456.1 comprises the following steps:
A. the modulation of titanium dioxide light catalyst solution
A. with the titaniferous aqueous solution after ion-exchange, add aqueous slkali and form the colloidal solution that contains titanium hydroxide;
B. in the colloidal solution of (a) gained, add organic acid, form uniform solution; The mol ratio of the titanium hydroxide in organic acid and the colloidal solution is 0.1-0.2: 1;
Above-mentioned organic acid is tartaric acid, malic acid, lactic acid, citric acid, glycolic, mandelic acid, butyric acid, charcoal acid, formic acid, acetate, maleic acid, boric acid, fumaric acid or propionic acid;
C. isolate the titanium hydroxide solid from the uniform solution that (b) forms, the electrical conductivity that is washed till water layer with deionized water is no more than 10 μ S ℃ M
-2
D. with titanium hydroxide solid dispersed washed in (c) in deionized water, add hydrogenperoxide steam generator, titanium hydroxide solid and hydrogen peroxide mol ratio are 1: 0.5-1.5, be heated to 90-150 ℃, after 4-120 hour, be cooled to 5-20 ℃, obtain having the anatase titanium dioxide photocatalyst aqueous solution of complex, the pH value of solution is 6.5-7.0, and particle diameter is no more than 50nm;
The concentration expressed in percentage by weight of above-mentioned hydrogen peroxide is 5-60%;
B. contain the modulation of the metal oxide mixed-powder of tourmaline powder
A. calcium oxide 70-90 weight %, aluminium oxide 3-15 weight %, magnesia 2-6 weight %, and tourmaline powder 4-10 weight % mix the mixed-powder that forms the homogeneous system by proportioning;
B. with the mixed-powder that obtains in (a) under 600-700 ℃ temperature heat preservation sintering 2-3 hour;
C. the metal oxide mixed-powder that contains tourmaline powder that the process processing sintering that obtains in (b) is crossed is pulverized with pulverizer, and the particle talent of powder is reached below the 10 μ m;
The titanium dioxide light catalyst solution of (A) modulation is mixed with the metal oxide powder that contains tourmaline powder that (B) makes, make the photocatalyst of titanium dioxide composite solution of generating negative ions; The amount that inserts the metal oxide powder that contains tourmaline powder accounts for the 2%-10% of photocatalyst of titanium dioxide composite solution.
The preparation method of the photocatalyst of titanium dioxide composite solution of described Chinese patent 200410026456.1, be to modulate in the A. step can also add in the titanium dioxide light catalyst solution that obtains thousand minutes to ten thousand of respectively being equivalent to the titanium hydroxide quality/ surfactant and tackifier; Surfactant is carboxylate, sulfuric ester, phosphate or polymerised glycol class or multivalence alcohol surfactants; The tackifier that adopted are carboxymethyl cellulose, ethyl cellulose, montmorillonite, methylcellulose or acrylic compounds tackifier.
The preferred C-band uviol lamp of described uviol lamp.
The preferred 1.0-10cm of the distance of described photocatalysis filter screen and uviol lamp.
The preferred 2-3 of the uviol lamp of described photocatalytic reaction unit.
The foamed plastics polyurethane or the polyester of the preferred compound in advance last layer porous, inorganic medium of the carrier in the described photocatalysis filter screen.
The compound in advance porous, inorganic medium of carrier foamed plastics in the described photocatalysis filter screen is diatomite, clay, natural zeolite, molecular sieve, SiO
2, apatite or similar porous, inorganic thing.(the carrier foamed plastics can be coated with one deck glue earlier, is coated with or sprinkles porous, inorganic medium powder and make).Photocatalyst has bigger surface area after on the porous, inorganic medium, light-catalyzed reaction efficient is higher.
Describedly go out air door and install the plastics filter cloth additional.
Described indoor air-purification device bottom is provided with roller.
The purification process of this device is designed to, and air sucks from shutter, after primary filter dust arrester and Treatment by Photocatalysis Oxidation device purified treatment, filters through active carbon cloth and sends from going out air door.
Advantage of the present invention and beneficial effect are: because photochemical catalyst adopts the photocatalyst of titanium dioxide composite solution and the particular processing technology of (independent research) Chinese patent 200410026456.1 generating negative ions, rational in infrastructure, when the air suction apparatus, dust in air is earlier through the multiple strainer filtering of primary filter dust arrester; Through the Treatment by Photocatalysis Oxidation device time, very strong photocatalytic oxidation takes place in the photocatalysis filter screen of ultraviolet ray (lamp) irradiation, and airborne toxic organic compound is decomposed by non-selectivity ground exhaustive oxidation, bacterium also is killed simultaneously, and is good especially to the treatment effect of the purification of air and sterilization.Be provided with negative ion generating device in the device, make air more pure and fresh.
Description of drawings
Fig. 1 is structural principle of the present invention (analysing and observe) figure.
Fig. 2 is a shell front view of the present invention.
Fig. 3 is the structural representation of blower fan when placing Treatment by Photocatalysis Oxidation device rear (top).
1-casing 2-shutter 3-control panel 4-goes out air door 5-roller 6-primary filter net 7 high efficiency particulate air 8-activated charcoal strainer 9-air outlet guard board drive unit 11-circuit board 12-negative ion generating device 13-photocatalysis screen pack 14-uviol lamp 15-and goes out wind scoop 16-blower fan 17-foot pad
Concrete embodiment
Further specify the present invention below in conjunction with drawings and Examples, but do not constitute any limitation of the invention.
Embodiment 1:
Fig. 1, indoor air purifier using photocatalytic oxidation process shown in Figure 2 are upright box typed structure, by casing 1, with blower fan 16 is the air guide device of power source, by filtering accuracy is that the elementary micronic dust screen pack 6 of 1-10 μ m, filtering accuracy are the intermediate micronic dust screen pack 7 of 0.5-1 μ m, the primary filter dust arrester that activated charcoal strainer 8 is formed, and Treatment by Photocatalysis Oxidation device, circuit board 11, control panel 3 are formed;
Air guide device by shutter 2, go out air door 4, go out wind scoop 15, cross flow fan 16, air outlet guard board drive unit 9 and casing 1 form, air is through going out wind scoop 15 and cross flow fan 16 enters the Treatment by Photocatalysis Oxidation device;
The Treatment by Photocatalysis Oxidation device is made up of two photocatalytic reaction units, photocatalyst filtering net thickness is 10mm, the distance of C-band uviol lamp and photocatalyst filtering net is 2cm, photocatalyst filtering net is that cellular polyurethane and the natural zeolite composite of 0.5-4mm is carrier with the aperture, is fixed in the air guide device;
Photocatalyst adopts the photocatalyst of titanium dioxide composite solution of generating negative ions, and the preparation method is as follows;
(1) product is made the preparation of material liquid
(1) titanium tetrachloride solution with weight percent concentration 50% dilutes 60 times with deionized water, handles with ionic membrane subsequently, changes the chlorination oxygen titanium aqueous solution into;
(2) ammoniacal liquor with weight percent concentration 25% dilutes 10 times with deionized water, and its solution with (1) middle gained is mixed with volume ratio at 1: 6, and neutralization reaction takes place:
(3) after the neutralization reaction, the pH value of solution is transferred to 6.8, place and remove the moisture on upper strata with centrifuge after 30 minutes, the Ti that stays (OH)
4Precipitation continues to use washed with de-ionized water, is 10 μ SCM until the electrical conductivity of upper strata liquid
-2Till, stop to clean.
(2) titanium hydroxide that obtains cleaning in (one) precipitation is dissolved in deionized water after, the malic acid that is used as stabilization agent is handled, the amount of adding is 1/8 (mol ratio) of titanium hydroxide amount.After malic acid added, it is acid that the pH value of solution is, and with alkaline matter pH value transferred to about 7.
(3) with the solution that obtains in 30% the hydrogen peroxide treatment (two), the addition of hydrogen peroxide is 1.5 times (mol ratios) of titanium hydroxide amount, after hydrogen peroxide adds, static 24 hours, after the intact and superfluous hydrogen peroxide of question response thoroughly decomposes, this solution is heated to 100 ℃, be 6 hours heat time heating time, cooling obtains white anatase type titanium oxide solution.The surfactant sodium phosphate and the tackifier sodium carboxymethylcellulose that add each 0.2 milligram/gram titanium hydroxide then in this solution have promptly been made the aqueous solution that titanium dioxide is made photocatalyst (A).
(4) be added into 5% the metal oxide mixed-powder that contains tourmaline powder in the A coating fluid that in (three), obtains, promptly make highly efficient titania photocatalyst (B) compound aqueous solution of generating negative ions through the processing sintering.
Attached on cellular polyurethane and the natural zeolite composite material carrier, the number of times of spraying is 3 times to photocatalyst with spraying method, and is following dry 60 minutes at 120 ℃ then.
Be provided with negative ion generating device 12 in the device, bottom of device is provided with roller 17.
This device detects under the condition of 25 ℃ of photocatalysis test temperatures, humidity 50%, and dimethylbenzene and content of formaldehyde are 6.50 and 4.22mg/m during start
3, start shooting after 3 hours dimethylbenzene and content of formaldehyde are respectively 0.42 and 0.16mg/m
3
Embodiment 2:
In example 1 indoor air purifier using photocatalytic oxidation process, the distance of uviol lamp and photocatalyst filtering net changes 5cm into, and consequently: detect under the condition of 25 ℃ of photocatalysis test temperatures, humidity 50%, dimethylbenzene and content of formaldehyde are 3.45 and 4.80mg/m during start
3, start shooting after 3 hours dimethylbenzene and content of formaldehyde are respectively 1.08 and 1.22mg/m
3
In example 1 indoor air purifier using photocatalytic oxidation process, attached on cellular polyurethane and the natural zeolite composite material carrier, the number of times of spraying is 5 times to photocatalyst with spraying method, is 90 minutes in the time of 120 ℃ of processing.
Consequently: detect under the condition of 25 ℃ of photocatalysis test temperatures, humidity 50%, dimethylbenzene and content of formaldehyde are 8.52 and 6.70mg/m during start
3, start shooting after 3 hours dimethylbenzene and content of formaldehyde are respectively 0.63 and 0.45mg/m
3
In example 1 indoor air purifier using photocatalytic oxidation process, photocatalyst, dries attached on cellular polyurethane and the natural zeolite composite material carrier with impregnation method, and in the 60 minutes time of 120 ℃ of processing, repeated impregnations dries, and handles 120 minutes at 150 ℃.
Its result of the test is: detect under the condition of 25 ℃ of photocatalysis test temperatures, humidity 50%, dimethylbenzene and content of formaldehyde are 7.80 and 9.65mg/m during start
3, start shooting after 3 hours dimethylbenzene and content of formaldehyde are respectively 0.38 and 0.35mg/m
3
In example 1 indoor air purifier using photocatalytic oxidation process, to go out wind scoop 15 and cross flow fan 16 and be arranged on Treatment by Photocatalysis Oxidation device (see figure 3) afterwards, photocatalyst filtering net is a carrier with cellular polyester and natural zeolite composite, consequently: detect under the condition of 25 ℃ of photocatalysis test temperatures, humidity 50%, dimethylbenzene and content of formaldehyde are 6.50 and 4.22mg/m during start
3, start shooting after 3 hours dimethylbenzene and content of formaldehyde are respectively 0.60 and 0.20mg/m
3
Claims (10)
1. indoor air purifier using photocatalytic oxidation process is that air guide device, primary filter dust arrester, Treatment by Photocatalysis Oxidation device, circuit board (11), the control panel (3) of power source formed by casing (1), with blower fan (16);
It is characterized in that:
The primary filter dust arrester by filtering accuracy be 1-5 μ m primary filter net (6), filtering accuracy be 0.5 in efficient micronic dust screen pack (7) and activated charcoal strainer (8) form;
Air guide device by shutter (2), go out air door (4), go out wind scoop (15) blower fan (16), air outlet guard board drive unit (9) and casing (1) form, and goes out wind scoop (4) and blower fan (16) is arranged on before the Treatment by Photocatalysis Oxidation device;
The Treatment by Photocatalysis Oxidation device is made of 1-5 photocatalytic reaction unit; Each photocatalytic reaction unit is a carrier by foamed ceramics, foam metal or with compound last layer porous, inorganic medium in advance and the foamed plastics that adopts metal or plastics to make frame, photocatalyst of titanium dioxide composite solution photocatalyst with Chinese patent 200410026456.1, the aperture is 0.5-4mm, thickness is that cellular photocatalyst filtering net (13) and the uviol lamp (14) of 5-20mm formed, photocatalyst filtering net is in two sides of uviol lamp, uviol lamp is 1-5, and the distance of photocatalyst filtering net and uviol lamp is 0.5-20cm;
Attached on the carrier, the number of times of dipping, coated or spraying is 1-10 time to photochemical catalyst with dipping, coated or spraying method, then at 20-180 ℃ of dry 20-180min;
Be provided with negative ion generating device (12) in the device.
2. according to the indoor air purifier using photocatalytic oxidation process described in the claim 1, it is characterized in that wind scoop (15) and blower fan (16) are arranged on after the Treatment by Photocatalysis Oxidation device.
3. according to the indoor air purifier using photocatalytic oxidation process described in the claim 1, it is characterized in that the preparation method of photocatalyst of titanium dioxide composite solution comprises the following steps:
A. the modulation of titanium dioxide light catalyst solution
A. with the titaniferous aqueous solution after ion-exchange, add aqueous slkali and form the colloidal solution that contains titanium hydroxide;
B. in the colloidal solution of (a) gained, add organic acid, form uniform solution; The mol ratio of the titanium hydroxide in organic acid and the colloidal solution is 0.1-0.2: 1;
Above-mentioned organic acid is tartaric acid, malic acid, lactic acid, citric acid, glycolic, mandelic acid, butyric acid, charcoal acid, formic acid, acetate, maleic acid, boric acid, fumaric acid or propionic acid;
C. isolate the titanium hydroxide solid from the uniform solution that (b) forms, the electrical conductivity that is washed till water layer with deionized water is no more than 10 μ SCM
-2
D. with titanium hydroxide solid dispersed washed in (c) in deionized water, add hydrogenperoxide steam generator, titanium hydroxide solid and hydrogen peroxide mol ratio are 1: 0.5-1.5, be heated to 90-150 ℃, after 4-120 hour, be cooled to 5-20 ℃, obtain having the anatase titanium dioxide photocatalyst aqueous solution of complex, the pH value of solution is 6.5-7.0, and particle diameter is no more than 50nm;
The concentration expressed in percentage by weight of above-mentioned hydrogen peroxide is 5-60%;
B. contain the modulation of the metal oxide mixed-powder of tourmaline powder
A. calcium oxide 70-90 weight %, aluminium oxide 3-15 weight %, magnesia 2-6 weight %, and tourmaline powder 4-10 weight % mix the mixed-powder that forms the homogeneous system by proportioning;
B. with the mixed-powder that obtains in (a) under 600-700 ℃ temperature heat preservation sintering 2-3 hour;
C. the metal oxide mixed-powder that contains tourmaline powder that the process processing sintering that obtains in (b) is crossed is pulverized with pulverizer, and the particle talent of powder is reached below the 10 μ m;
The titanium dioxide light catalyst solution of (A) modulation is mixed with the metal oxide powder that contains tourmaline powder that (B) makes, make the photocatalyst of titanium dioxide composite solution of generating negative ions; The amount that inserts the metal oxide powder that contains tourmaline powder accounts for the 2%-10% of photocatalyst of titanium dioxide composite solution.
4. according to the indoor air purifier using photocatalytic oxidation process described in the claim 3, the preparation method who it is characterized in that the photocatalyst of titanium dioxide composite solution, be to modulate in the A. step in the titanium dioxide light catalyst solution that obtains add thousand minutes to ten thousand of respectively being equivalent to the titanium hydroxide quality/ surfactant and tackifier; Surfactant is carboxylate, sulfuric ester, phosphate or polymerised glycol class or multivalence alcohols surface surfactant; The tackifier that adopted are carboxymethyl cellulose, ethyl cellulose, montmorillonite, methylcellulose or acrylic compounds tackifier.
5. according to the indoor air purifier using photocatalytic oxidation process described in the claim 1, it is characterized in that uviol lamp is the C-band uviol lamp.
6. according to the indoor air purifier using photocatalytic oxidation process described in the claim 1, the distance that it is characterized in that photocatalysis filter screen and uviol lamp is 1.0-10cm.
7. according to the indoor air purifier using photocatalytic oxidation process described in the claim 1, the uviol lamp that it is characterized in that photocatalytic reaction unit is 2-3.
8. according to the indoor air purifier using photocatalytic oxidation process described in the claim 1, it is characterized in that the carrier in the photocatalysis filter screen is the foamed plastics polyurethane or the polyester of compound last layer porous, inorganic medium in advance.
9. according to the indoor air purifier using photocatalytic oxidation process described in the claim 1, it is characterized in that air door (4) installs the plastics filter cloth additional.
10. according to each indoor air purifier using photocatalytic oxidation process among the claim 1-9, it is characterized in that the indoor air-purification device bottom is provided with roller (5).
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