CN101314101A - Air purification method combined of adsorption and heat catalytic oxidation regeneration in situ - Google Patents

Air purification method combined of adsorption and heat catalytic oxidation regeneration in situ Download PDF

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Publication number
CN101314101A
CN101314101A CNA2008101169187A CN200810116918A CN101314101A CN 101314101 A CN101314101 A CN 101314101A CN A2008101169187 A CNA2008101169187 A CN A2008101169187A CN 200810116918 A CN200810116918 A CN 200810116918A CN 101314101 A CN101314101 A CN 101314101A
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porous material
absorption
formaldehyde
benzene series
air
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CN101314101B (en
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朱天乐
樊星
王美艳
陈运法
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Beihang University
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Beihang University
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Abstract

The invention discloses a method for purifying air by combining adsorption and in-situ heat catalytic oxidation regeneration. The method uses a porous material with adsorption and catalysis functions and a porous material with protective adsorption to adsorb low concentration of formaldehyde and benzene series in the air; when the adsorption of the porous material approaches to saturation, electrical heating is started to activate the catalytic activity of the porous material with the adsorption and catalysis functions, thereby catalytically oxidizing the formaldehyde and the benzene series which are adsorbed on the surface of the porous material into carbon dioxide and water; at the same time, the adsorption capability of the porous material is regenerated; the regenerated porous material is reused for adsorption; thus air purification can be realized through the circulation. The method has the advantages of high efficiency, energy conservation, low cost, no secondary pollution and so on. The method is suitable for purifying air containing the low concentration formaldehyde and the benzene series in a building, a cabin or other restricted spaces.

Description

The air purification method that absorption combines with heat catalytic oxidation regeneration in situ
Technical field
The invention belongs to public health and field of environment protection; relate to and a kind ofly utilize absorption to combine with heat catalytic oxidation regeneration in situ the not smooth confined space of ventilation; comprise on the ground, semi-underground or the underground structure is inner; and the low concentration formaldehyde in airtight or the semi-hermetic cabin air and benzene series thing (benzene,toluene,xylene, ethylbenzene, styrene and isopropylbenzene) carry out purified treatment, thereby obtain the method for pure air.
Background technology
Dwelling house, underground parking, civil air defense constructions and installations, underpass, public place and the interior of building that the crowd is dense, and the cabin ambient air quality of all kinds of traffic, means of transport and health, life security, physical efficiency performance, and indoor article, weaponry, instrument and meter performance are closely bound up.Yet because the enclosure effect of construction material or other construction material, it is outdoor or out of my cabin to make the air in indoor or cabin be different from.Nearest one of Environmental Protection Agency studies show that, people in the indoor degree of some pollutant of accepting above outdoor 100 times.A research of Hong Kong environmental administration points out, has 1/3 Indoor Air Quality in Office Building not meet the standard of the World Health Organization and other linked groups approximately.Australian researcher thinks that the pollution level of room air is above outdoor 5 to 20 times.Similarly, some air pollutants airtight or the semi-hermetic cabin also are varied, and concentration is considerably beyond safe range.As in the detected pernicious gas in submarine cabin kind surplus in the of 400 nearly, harm, particularly its accumulation synergy such as these pernicious gases are toxic respectively, excitant and corrosivity can be to the serious harm of ship person, weaponry even submarine formation itself.By detecting, having determined has the basic chemical substance of 28 classes at the trace contaminant in Russia " peace " number cabin, space station, is mainly organic pollution.
Generally speaking, pollutant is varied in interior of building or the cabin air, but based on formaldehyde and benzene series thing.The purified treatment of formaldehyde and benzene series thing in the indoor or cabin air environment, the more method of research is absorption, photocatalysis, plasma oxidation and ozone oxidation etc. at present, these methods can both possess the effect that purifies formaldehyde and benzene series thing to a certain extent, but all have limitation.Such as, adopt adsorption treatment merely, replacing after adsorbent is saturated or dismounting regeneration can bring operation inconvenience, problems such as disposal cost height.Photocatalysis, plasma or ozone Oxidation Treatment exist purification efficiency limited, and oxidation is incomplete, can produce problems such as harmful intermediate product or effusion higher concentration ozone.
The combination multiple technologies purify the air of a room and receive publicity recently, as application number is 200610104652.5, patent name is in the low-temperature plasma zone or is close to this zone for the invention proposition of " indoor air purification method that a kind of absorption method combines with low temperature plasma " is adsorbent bed, makes the useful effect of low-temperature plasma physical efficiency in adsorbent.When purifying air, earlier by adsorbent enrichment dusty gas and suspended particulate, when absorption reaches capacity, start low temperature plasma a period of time, rely on electromagnetic field effect, electron collision effect desorb and the reproducing adsorbent of plasma, and decomposition discharges nitrogen oxide, oxysulfide, organic pollution etc., the like this circulation to realize air cleaning.This method combines the effect of absorption and plasma oxidation, but this method exists pollutant purification not thorough, can produce high-concentrated ozone and other harmful intermediate product, thereby cause secondary pollution problems.Application number is 200610047122.1 for another example, patent name makes the active carbon that is filled in the organic adsorbate of absorption between sparking electrode carry out in-situ regeneration under the bombardment of high activity species, ultraviolet ray irradiation and high energy electron for the invention of " medium blocking discharging plasma active carbon in situ regeneration method and device " proposes to utilize the low temperature nonequilibrium plasma that dielectric barrier discharge produces under the atmospheric pressure.This method also is the effect that combines absorption and plasma oxidation, has the deficiency identical with aforementioned patent.
Summary of the invention
Deficiency at existing air purification method existence, the invention provides the air purification method that a kind of absorption combines with heat catalytic oxidation regeneration in situ, this method combines with heat catalytic oxidation regeneration in situ by absorption low concentration formaldehyde in the Air and Water in Limited Space and benzene series thing is carried out purified treatment.
Basic ideas of the present invention are to utilize to have absorption and catalysed oxidn concurrently and play at room temperature long-time airborne low concentration formaldehyde of adsorbing separation of the adsorbing porous material of protectiveness and benzene series thing; When porous material absorption when saturated, transfer these organic matters of short time heatable catalytic oxidation to, make it to become carbon dioxide and water, so circulation realizes the purpose that purifies air.
The technical solution that the present invention takes is as follows:
Make pending air successively by particle screen pack, the porous material that has absorption and catalytic action concurrently, an adsorbing porous material of protectiveness by blower fan, then, the output pure air.When the sense of smell by instrument or people detects gas formaldehyde that clarifier outlet discharges or benzene series substrate concentration and surpasses the limit value of GB/T18883-2002 " indoor air purification standard " regulation, can think that porous material absorption is near saturated.At this moment, close blower fan, adjust the clarifier modes of emplacement, the porous material that has absorption and catalysed oxidn concurrently has been positioned on the adsorbing porous material of protectiveness.Energising heating porous material, activation has the catalytic activity of absorption and catalysed oxidn porous material concurrently, catalytic oxidation has been adsorbed on the formaldehyde and the benzene series thing of porous material surface, and making it catalytic oxidation is carbon dioxide and water, and makes the adsorption capacity of porous material obtain regeneration.After the porous material regeneration, filter again, adsorb, so circulation realizes the thorough purification of air.
The air purification method beneficial effect that the absorption that the present invention relates to combines with heat catalytic oxidation regeneration in situ is as follows:
(1) will adsorb to combine and be used for the purification of low concentration formaldehyde and benzene series thing with heat catalytic oxidation regeneration in situ, both solve the adsorbent life-span finite sum that independent employing absorption exists and changed the unhandy problem of adsorbent, overcome the obstacle that Continuous Heat catalytic oxidation energy consumption height and air can not direct reuses again.
(2) before heat catalytic oxidation regeneration carries out; by adjusting the clarifier modes of emplacement; guarantee from the formaldehyde of protectiveness suction-operated porous material surface desorption and benzene series thing by thermodynamic activity; upwards enter with air-flow and to have the absorption and the porous material of catalytic action concurrently, and be carbon dioxide and water by catalytic oxidation.Owing to do not need to organize air-flow, thereby saved investment and the operating cost increase that brings thus by blower fan.
(3) electrical heating of heat catalytic oxidation relies on the porous electric hot plate realization that porous material is played position-limiting action.And by electric boiling plate and electrical heating control loop, in the time of can guaranteeing the heatable catalytic oxidation, have concurrently the absorption and the temperature of catalytic action porous material compared with the temperature of protectiveness suction-operated porous material high 50 ℃~70 ℃.
(4) electric boiling plate had both played heat effect, played again with solid thermal insulation board and formed two cavitys, loaded the porous material that has absorption and catalytic action concurrently, and played the adsorbing porous material of protectiveness.
(5) a kind of brand-new air cleaning flow process has been proposed, promptly long-time absorption, short time heat catalytic oxidation regeneration in situ, so circulation, both guaranteed that low concentration formaldehyde and benzene series thing were thoroughly purified in the air, saved operating cost again, reduce energy consumption, simplified operation, and do not had the secondary pollution problem.
Description of drawings
Fig. 1 implements air cleaning system schematic diagram of the present invention;
Fig. 2 implements electric heating part of the present invention and porous material loading schematic diagram.
The specific embodiment
Below in conjunction with accompanying drawing air purification method of the present invention is elaborated.
Referring to Fig. 1, realize air purification method of the present invention be with from the pending air in limited space under the effect of blower fan 2, earlier by particle screen pack 1, remove particle; Again successively by having the absorption and the porous material 3 of catalytic action concurrently, playing the adsorbing porous material 4 of protectiveness, removal formaldehyde and benzene series thing.Sense of smell by instrument or people; when detecting from the gas that clarifier outlet is discharged formaldehyde or benzene series substrate concentration and surpassing the limit value of GB/T18883-2002 " indoor air purification standard " regulation, can think the porous material 3 that has absorption and catalytic action concurrently, to play adsorbing porous material 4 absorption of protectiveness approaching saturated.At this moment, control module 5 sends instruction, closes blower fan, adjusts the clarifier modes of emplacement, and the porous material 3 that has absorption and catalysed oxidn concurrently has been positioned on the adsorbing porous material 4 of protectiveness.The energising heating has porous material 3, an adsorbing porous material 4 of protectiveness of absorption and catalytic action concurrently, changes the heat catalytic oxidation regeneration stage over to.Play the adsorbing porous material 4 of protectiveness after heating; absorption formaldehyde and the volatilization of benzene series thing thereon rises in porous material 3 beds that have absorption and catalytic action concurrently; the porous material 3 that has absorption and catalytic action concurrently is oxidized to carbon dioxide and water with formaldehyde and benzene series thing after heating, and obtains regeneration.So circulation realizes the purification of air.
Referring to Fig. 1, the step that the invention process Air and Water in Limited Space purifies is:
(1) pending air passes through particle screen pack 1 earlier under the draft effect of blower fan 2, remove the particle that is mingled with in the air.
(2) utilize the porous material 3 that has absorption and catalytic action concurrently and the low concentration formaldehyde and the benzene series thing that rise in adsorbing porous material 4 absorbed airs of protectiveness.
Activated alumina, molecular sieve or the titanium dioxide of the described porous material 3 that has absorption and catalytic action concurrently precious metals pt that has been load or Au.The weight ratio of Pt or Au and titanium dioxide, aluminium oxide or molecular sieve is 0.5~2%.This porous material normal temperature is energy absorbing formaldehyde and benzene series thing down; Energy catalyze oxidation of formaldehyde and benzene series thing are carbon dioxide and water under 170 ℃~210 ℃ temperature.
Described the adsorbing porous material 4 of protectiveness is activated carbon granule, NACF; Or the activated carbon granule of surface impregnation manganese oxide, NACF, and the weight ratio of manganese oxide and activated carbon granule or NACF is 1~6%.Absorbing formaldehyde and benzene series thing under this porous material normal temperature; Formaldehyde that adsorbs under 100 ℃~140 ℃ temperature and benzene series thing can be under desorptions on this porous material.
(3) when sense of smell by instrument or people; when detecting from the gas that the adsorbing porous material of protectiveness 4 is discharged formaldehyde or benzene series substrate concentration and surpassing the limit value of GB/T18883-2002 " indoor air purification standard " regulation, can think the porous material 3 that has absorption and catalytic action concurrently and to play adsorbing porous material 4 absorption of protectiveness approaching saturated.At this moment, control module 5 sends instruction and closes blower fan 2.
(4) adjust the clarifier modes of emplacement, make the porous material 3 that has absorption and catalysed oxidn concurrently heat desorption and regeneration on being positioned at the adsorbing porous material 4 of protectiveness.
A described porous material 3 and an adsorbing porous material 4 of protectiveness that has absorption and catalytic action concurrently is loaded in respectively in the cavity 8 and cavity 9 that is made of porous electric hot plate 6 and solid thermal insulation board 7, and concrete modes of emplacement is referring to Fig. 2.Porous electric hot plate 6 is vertical with airflow direction, guarantees the air-flow normally; Solid thermal insulation board 7 is parallel with airflow direction, and is close to housing.
Described have concurrently absorption and catalysed oxidn porous material 3 inside be provided with the coupling circuit that constitutes by thermocouple-thermostat; the maximum temperature that coupling circuit and the control of porous electric hot plate have absorption and catalysed oxidn porous material 3 inside concurrently is 210 ± 1 ℃, and the maximum temperature that plays protectiveness suction-operated porous material 4 is 140 ± 1 ℃.The temperature rising 1~3 minute that the temperature that plays protectiveness suction-operated porous material 4 raises and lags behind and have absorption and catalysed oxidn porous material 3 concurrently.
(5) control module 5 sends and opens the electrical heating instruction, heat activation has the catalytic activity of absorption and catalytic action porous material 3 concurrently, it was worked 4~6 minutes under 170 ℃~210 ℃ states, and formaldehyde and benzene series thing that catalytic oxidation is adsorbed on the surface are carbon dioxide and water.In this process; playing the adsorbing porous material of protectiveness also is heated; thereby make to be adsorbed on its surperficial formaldehyde and benzene series thing desorption comes out, and under thermodynamic activity, upwards flow into the porous material that has absorption and catalytic action concurrently, finally be oxidized to carbon dioxide and water.
(6) return to the normal sorption state, control module 5 sends instruction and opens blower fan 2, enters absorption phase.
The above-mentioned steps circulation is carried out, and can realize the purpose that purifies air.
But described blower fan 2 both had been arranged on particle screen pack 1 and had had concurrently between the porous material 3 of absorption and catalytic action shown in the image pattern 1, also can be arranged on after the adsorbing porous material 4 of protectiveness, played the effect that suction power is provided for pending air.
Generally speaking, indoor or cabin formaldehyde that the present invention relates to and benzene series thing purification method collection filter removes particle, and formaldehyde and benzene series thing are removed in absorption, and heat catalytic oxidation formaldehyde and benzene series thing are that carbon dioxide and water etc. act on one.Cross the air-flow of cleaning system by flow of tissue reasonably, switch blower fan 2 operation and electrical heating switches, can realize long-time efficient pending airborne formaldehyde of adsorbing separation and benzene series thing, and realize that original position short time these pollutants of heat catalytic oxidation are the purpose of carbon dioxide and water.Simultaneously, because the thermal desorption effect makes the absorption property of porous material be able to former bit recovery, thereby significantly reduce problems such as raising of the replacing operating cost that adsorbent brought and maintenance difficulties increase.
According to air purification method of the present invention, carry out dissimilar porous materials and different parameters formaldehyde and the benzene series thing under being provided with and purified experiment, be exemplified below:
Embodiment 1
(1) pending air contains 2.12mg/m 3Formaldehyde, 10.11mg/m 3Benzene series thing (2.21mg/m 3Benzene, 6.11mg/m 3Toluene and 1.79mg/m 3Dimethylbenzene), described pending air earlier by particle screen pack 1, is removed the particle that is mingled with in the air under the draft effect of blower fan 2.
(2) utilize the porous material 3 that has absorption and catalytic action concurrently and the low concentration formaldehyde and the benzene series thing that rise in adsorbing porous material 4 absorbed airs of protectiveness.
The porous material 3 that has absorption and catalytic action concurrently is the activated alumina (Pt/Al of load 0.5%Pt 2O 3); Play the adsorbing porous material 4 of protectiveness for being impregnated with the activated carbon granule (Mn/AC) of 1% manganese oxide.
Air after particle screen pack 1 filters passes through Pt/Al earlier 2O 3, by Mn/AC, air speed is 3 * 10 again 4h -1
(3) by instrument or people's sense of smell, the concentration of monitoring formaldehyde, benzene, toluene and dimethylbenzene from porous material Mn/AC discharge gas, result show that after ventilating continuously 600 hours, the concentration of outlet formaldehyde, benzene, toluene and dimethylbenzene is respectively 0.08mg/m 3, 0.09mg/m 3, 0.20mg/m 3And 0.07mg/m 3, toluene concentration just reaches the limit value of GB/T18883-2002 " IAQ standard " regulation, and the concentration of other polluter is lower than limit value.Can think that the porous material 3 and adsorbing porous material 4 absorption of a protectiveness that have absorption and catalytic action concurrently are saturated this moment, send instruction by control module 5 and close blower fan 2.
(4) adjust the clarifier modes of emplacement, make the porous material 3 that has absorption and catalysed oxidn concurrently heat desorption and regeneration on being positioned at the adsorbing porous material 4 of protectiveness.
(5) control module 5 sends and opens the electrical heating instruction, heat activation has the catalytic activity of absorption and catalytic action porous material 3 concurrently, keeping its bed temperature is 210 ± 1 ℃, makes to be adsorbed on to have absorption concurrently and the formaldehyde and the benzene series thing on catalytic action porous material 3 surfaces is oxidized to carbon dioxide and water.In this process, play the adsorbing porous material of protectiveness and also be heated, and the time ratio that reaches 140 ± 1 ℃ of maximum temperatures has absorption and catalytic action porous material temperature concurrently and reaches 210 ± 1 ℃ and want late 1~3 minute.After the porous material that plays protective effect is heated, is adsorbed on its surperficial formaldehyde and benzene series thing and is come out, and under thermodynamic activity, upwards flow into the porous material 3 that has absorption and catalytic action concurrently, finally be oxidized to carbon dioxide and water by desorption.Continuous detecting is from having the gas concentration lwevel of absorption and catalytic action porous material 3 surperficial emergent gas concurrently, after 4 minutes, the concentration of detected gas concentration lwevel and Carbon Dioxide in Air is suitable, and this shows that catalytic oxidation process finishes, and the adsorption capacity of porous material obtains regeneration.
(6) return to the normal sorption state, control module 5 sends instruction unlatching blower fan 2 and stops heating simultaneously, enters absorption phase.
The above-mentioned steps circulation is carried out, and realizes the purpose that purifies air.
Embodiment 2
(1) pending air contains 3.20mg/m 3Formaldehyde, 8.10mg/m 3Benzene series thing (0.96mg/m 3Benzene, 2.58mg/m 3Toluene and 4.56mg/m 3Dimethylbenzene), described pending air earlier by particle screen pack 1, is removed the particle that is mingled with in the air under the draft effect of blower fan 2.
(2) utilize the porous material 3 that has absorption and catalytic action concurrently and the low concentration formaldehyde and the benzene series thing that rise in adsorbing porous material 4 absorbed airs of protectiveness.
The porous material 3 that has absorption and catalytic action concurrently is the 13X molecular sieve (Au/13XMS) of load 2%Au; Playing the adsorbing porous material 4 of protectiveness is activated carbon granule (AC).
Air after particle screen pack 1 filters is earlier by Au/13XMS, and by AC, air speed is 3 * 10 again 4h -1
(3) by instrument or people's sense of smell, the concentration of monitoring formaldehyde, benzene, toluene and dimethylbenzene from porous material AC discharge gas, result show that after ventilating continuously 430 hours, the concentration of outlet formaldehyde, benzene, toluene and dimethylbenzene is respectively 0.08mg/m 3, 0.08mg/m 3, 0.09mg/m 3And 0.20mg/m 3, xylene concentration just reaches GB/T18883-2002 " IAQ standard ", and the concentration of other polluter is lower than limit value.Can think that the porous material 3 and adsorbing porous material 4 absorption of a protectiveness that have absorption and catalytic action concurrently are saturated this moment, send instruction by control module 5 and close blower fan 2.
(4) adjust the clarifier modes of emplacement, make the porous material 3 that has absorption and catalysed oxidn concurrently heat desorption and regeneration on being positioned at the adsorbing porous material 4 of protectiveness.
(5) control module 5 sends and opens the electrical heating instruction, heat activation has the catalytic activity of absorption and catalytic action porous material 3 concurrently, keeping its bed temperature is 170 ± 1 ℃, makes to be adsorbed on to have absorption concurrently and the formaldehyde and the benzene series thing on catalytic action porous material 3 surfaces is oxidized to carbon dioxide and water.In this process, play the adsorbing porous material 4 of protectiveness and also be heated, and the time ratio that reaches 140 ± 1 ℃ of maximum temperatures has absorption and catalytic action porous material 3 temperature concurrently and reaches 170 ± 1 ℃ and want late 1~3 minute.After the porous material that plays protective effect is heated, is adsorbed on its surperficial formaldehyde and benzene series thing and is come out, and under thermodynamic activity, upwards flow into the porous material that has absorption and catalytic action concurrently, finally be oxidized to carbon dioxide and water by desorption.Continuous detecting is from having the gas concentration lwevel of absorption and catalytic action porous material 3 surperficial emergent gas concurrently, after 6 minutes, the concentration of detected gas concentration lwevel and Carbon Dioxide in Air is suitable, and this shows that catalytic oxidation process finishes, and the adsorption capacity of porous material obtains regeneration.
(6) control module 5 sends instruction and stops heating, and opens blower fan 2 simultaneously and adsorb again.
The above-mentioned steps circulation is carried out, and realizes the purpose that purifies air.
Embodiment 3
(1) pending air contains 4.1mg/m 3Formaldehyde, 8.10mg/m 3Benzene series thing (0.96mg/m 3Ethylbenzene, 6.58mg/m 3Styrene and 0.56mg/m 3Isopropylbenzene), described pending air earlier by particle screen pack 1, is removed the particle that is mingled with in the air under the draft effect of blower fan 2.
(2) utilize the porous material 3 that has absorption and catalytic action concurrently and the low concentration formaldehyde and the benzene series thing that rise in adsorbing porous material 4 absorbed airs of protectiveness.
The porous material 3 that has absorption and catalytic action concurrently is the titanium dioxide (Pt/TiO of load 1%Pt 2); Playing the adsorbing porous material of protectiveness is the NACF (Mn/ACF) of surface impregnation 6% manganese oxide.
Air after particle screen pack 1 filters passes through Pt/TiO earlier 2, by Mn/ACF, air speed is 3 * 10 again 4h -1
(3) by instrument or people's sense of smell, the concentration of monitoring formaldehyde, benzene, toluene and dimethylbenzene from porous material Mn/ACF discharge gas, result show that after ventilating continuously 512 hours, the concentration of outlet formaldehyde, ethylbenzene, styrene and isopropylbenzene is respectively 0.1mg/m 3, 0.07mg/m 3, 0.09mg/m 3And 0.10mg/m 3, concentration of formaldehyde just reaches GB/T18883-2002 " IAQ standard ", and the concentration of other polluter is lower than limit value.Can think that the porous material 3 and adsorbing porous material 4 absorption of a protectiveness that have absorption and catalytic action concurrently are saturated this moment, send instruction by control module 5 and close blower fan 2.
(4) adjust the clarifier modes of emplacement, make the porous material 3 that has absorption and catalysed oxidn concurrently heat desorption and regeneration on being positioned at the adsorbing porous material 4 of protectiveness.
(5) control module 5 sends and opens the electrical heating instruction, heat activation has the catalytic activity of absorption and catalytic action porous material 3 concurrently, keeping its bed temperature is 200 ± 1 ℃, makes to be adsorbed on to have absorption concurrently and the formaldehyde and the benzene series thing of catalytic action porous material surface is oxidized to carbon dioxide and water.In this process, play the adsorbing porous material of protectiveness and also be heated, and the time ratio that reaches 120 ± 1 ℃ of maximum temperatures has absorption and catalytic action porous material temperature concurrently and reaches 200 ± 1 ℃ and want late 1~3 minute.After the porous material that plays protective effect is heated, is adsorbed on its surperficial formaldehyde and benzene series thing and is come out, and under thermodynamic activity, upwards flow into the porous material that has absorption and catalytic action concurrently, finally be oxidized to carbon dioxide and water by desorption.Continuous detecting is from having the gas concentration lwevel of absorption and catalytic action porous material 3 surperficial emergent gas concurrently, after 5 minutes, the concentration of detected gas concentration lwevel and Carbon Dioxide in Air is suitable, and this shows that catalytic oxidation process finishes, and the adsorption capacity of porous material obtains regeneration.
(6) control module 5 sends instruction and stops heating, and opens blower fan 2 simultaneously and adsorb again.
The above-mentioned steps circulation is carried out, and realizes the purpose that purifies air.
The inventive method can be widely used on the ground, semi-underground and underground structure, and the purified treatment of car and boat, spacecraft, submarine cabin air.

Claims (5)

1, the air purification method that combines with heat catalytic oxidation regeneration in situ of absorption is characterized in that comprising the steps:
Step 1, pending air pass through the particle screen pack earlier under the draft effect of blower fan, remove the particle that is mingled with in the air;
Step 2, utilization have the porous material of absorption and catalytic action and low concentration formaldehyde and the benzene series thing in the adsorbing porous material absorbed air of protectiveness concurrently;
Step 3, by instrument or people's sense of smell, detect formaldehyde or benzene series substrate concentration from the gas of the adsorbing porous material discharge of protectiveness; When described concentration surpasses the limit value of GB/T18883-2002 " indoor air purification standard " regulation, think that the porous material and the adsorbing porous material absorption of a protectiveness that have absorption and catalytic action concurrently are approaching saturated, at this moment, control module sends instruction and closes blower fan;
Step 4, adjustment clarifier modes of emplacement have been positioned on the adsorbing porous material of protectiveness the porous material that has absorption and catalysed oxidn concurrently;
Step 5, control module send opens the electrical heating instruction, heat activation has the catalytic activity of absorption and catalytic action porous material concurrently, it was worked 4~6 minutes under 170 ℃~210 ℃ states, and formaldehyde and benzene series thing that catalytic oxidation is adsorbed on the surface are carbon dioxide and water.In this process, playing the adsorbing porous material of protectiveness also is heated, thereby make to be adsorbed on its surperficial formaldehyde and benzene series thing desorption comes out, and under thermodynamic activity, upwards flow into the porous material that has absorption and catalytic action concurrently, finally be oxidized to carbon dioxide and water;
Step 6, return to the normal sorption state, open blower fan, enter absorption phase;
The above-mentioned steps circulation is carried out, and realizes the purpose that purifies air.
2, the air purification method that combines with heat catalytic oxidation regeneration in situ of absorption according to claim 1 is characterized in that: any one titanium dioxide or aluminium oxide or molecular sieve among the described porous material that has absorption and catalytic action concurrently has been surface impregnation Pt or the Au; The weight ratio of any one and titanium dioxide or aluminium oxide or molecular sieve is 0.5~2% among Pt or the Au; This porous material normal temperature is energy absorbing formaldehyde and benzene series thing down; Energy catalyze oxidation of formaldehyde and benzene series thing are carbon dioxide and water under 170 ℃~210 ℃ temperature.
3, the air purification method that combines with heat catalytic oxidation regeneration in situ of absorption according to claim 1 is characterized in that: playing the adsorbing porous material of protectiveness is activated carbon granule or NACF; Or the activated carbon granule of surface impregnation manganese oxide or NACF, and the weight ratio of manganese oxide and active carbon is 1~6%; Absorbing formaldehyde and benzene series thing under this porous material normal temperature, the formaldehyde of these absorption and benzene series thing under 100 ℃~140 ℃ temperature from this porous material under the desorption.
4, the air purification method that combines with heat catalytic oxidation regeneration in situ of absorption according to claim 1 is characterized in that: describedly have the porous material of absorption and catalytic action concurrently and rise in two cavitys that the adsorbing porous material of protectiveness is loaded in porous electric hot plate and solid thermal insulation board formation respectively; Wherein, the porous electric hot plate is vertical with airflow direction, and solid thermal insulation board is parallel with airflow direction and be close to purifier shell.
5, the air purification method that combines with heat catalytic oxidation regeneration in situ of absorption according to claim 1; it is characterized in that: during control module control heating, the temperature that the temperature rising hysteresis of a protectiveness suction-operated porous material has absorption and catalysed oxidn porous material concurrently raise 1~3 minute.
CN2008101169187A 2008-07-21 2008-07-21 Air purification method combined of adsorption and heat catalytic oxidation regeneration in situ Expired - Fee Related CN101314101B (en)

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