CN103463974A - Electro-catalytic air purifier and air purification method thereof - Google Patents

Electro-catalytic air purifier and air purification method thereof Download PDF

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CN103463974A
CN103463974A CN2013104382509A CN201310438250A CN103463974A CN 103463974 A CN103463974 A CN 103463974A CN 2013104382509 A CN2013104382509 A CN 2013104382509A CN 201310438250 A CN201310438250 A CN 201310438250A CN 103463974 A CN103463974 A CN 103463974A
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air
electrode
electrolyte
formaldehyde
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CN103463974B (en
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林天安
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林天安
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Abstract

The invention relates to an electro-catalytic air purifier and an air purification method of the electro-catalytic air purifier. The first aim of the invention is to provide an electro-catalytic air purifier, which is small and exquisite in structure, low in electricity consumption, quick in formaldehyde removal and environment-friendly. The second aim of the invention is to provide an electro-catalytic air purification method aiming at the air purifier. The first aim of the invention is achieved by the following technical scheme: the electro-catalytic air purifier comprises a shell, an electrolyte circulating pump, as well as an air suction fan, a spraying head, a plurality of three-dimensional electrode reactors and a liquid storage tank which are arranged in the shell sequentially from top to bottom. The second aim of the invention is achieved by the following technical scheme: the electro-catalytic air purification method comprises the following steps: (1) dissolving formaldehyde into Na2SO4-Na2CO3 mixed electrolyte by using the air suction fan and the electrolyte spraying head; (2) enabling the electrolyte in the step (1), into which the formaldehyde is dissolved, to vertically flow into the three-dimensional electrode reactors; and (3) introducing direct current into the three-dimensional electrode reactors so as to oxidize the formaldehyde into sodium formate.

Description

A kind of electro-catalyzing air purifier and for the method for air cleaning
Technical field
The present invention relates to a kind of electro-catalyzing air purifier and be somebody's turn to do the method for air cleaning.
Background technology
Formaldehyde is the greatest contamination source in current room.(molecular formula: HCHO) also claim formaldehyde, be the simplest aldehydes to formaldehyde, is generally a kind of flammable, colourless and gas excitatory.Soluble in water, alcohol and ether.Formaldehyde is more highly toxic material, controls formaldehyde on list at China's toxic chemical and is in second.Formaldehyde is defined as carcinogenic and teratogenesis shape material by the World Health Organization, is generally acknowledged allergen, is also one of potential strong mutagen.Long Term Contact low dosage formaldehyde can cause chronic respiratory disease, cause nasopharyngeal carcinoma, colon cancer, brain tumor, paramenia, nuclear gene mutation, in the DNA single chain commissure and DNA and protein commissure and suppress DNA damage reparation, pregnancy syndrome, cause neonatal chromosome disorder, leukaemia, cause teenager's memory and intelligence decline.In all contactees, children and pregnant woman's PARA FORMALDEHYDE PRILLS(91,95) are particularly responsive, and harm is also just larger, and the more Gao Shike vomiting that causes nausea of concentration, cough uncomfortable in chest, asthma, pulmonary edema, causing death even immediately.
In room, the main source of formaldehyde is interior decoration and buys furniture.Due to the finishing and the furniture manufacture to use a large amount of artificial boards (as glued board, lumber core, MDF, particieboard, consolidated floor and compoiste wood floor etc.), and produce wood-based plate, need a large amount of the use to take the adhesive that formaldehyde manufactures as raw material, because the formaldehyde release period in adhesive is very long, generally reach 15 years, cause formaldehyde to become the major pollutants in room air.
In order to eliminate the harm of indoor formaldehyde to human body, need to choose suitable air purifier and solve this problem.So-called air purifier is a kind of a kind of instrument that can purify air.Blower fan or the extraneous blower fan by self makes indoor air constantly pass through air purifier, dirty air is through cleaning module the time, by technology such as active carbon net, high-pressure electrostatic, photocatalysis, gradually airborne toxic gas and particulate matter are removed, last clean air is sent by air outlet.
Air purifier can be divided into the skill kinds such as physical absorption, photocatalysis, chemical complexing, anion according to purification techniques.
The existing air purifier from market, the functionality of removing formaldehyde is unsatisfactory, more or less has following point:
1, remove limited in one's ability and speed is very slow, for example the adsorbent absorption method;
2, remove very capable but can cause the secondary pollution to environment, for example Ozonation and chemical complexometry;
3, remove very capable but the complex structure power consumption is large, for example photocatalytic method with high costs.
Summary of the invention
Purpose one of the present invention is to provide that a kind of structure is small and exquisite, power consumption is low, formaldehyde is removed fast and environment amenable electro-catalyzing air purifier
Purpose two of the present invention is to provide that a kind of power consumption of using for above-mentioned air purifier is low, formaldehyde is removed fast and environment amenable electro-catalysis air purification method.
Being achieved through the following technical solutions of order one of the present invention: a kind of electro-catalyzing air purifier, it comprises housing, electrolyte circulating pump and from top to bottom is successively set on extraction fan, spray head, several 3 D electrode reactors and the reservoir in housing; Be positioned on described housing on the sidewall of reservoir top and offer housing air intlet A, the suction inlet of described electrolyte circulating pump connects reservoir, the circulate electrolyte pump discharge is connected with spray head, the spray of described spray head electrolyte out falls into 3 D electrode reactor, the suction opeing of described extraction fan is positioned at the spray head top, offers the gas outlet of at least one on the housing of described extraction fan top.
By extraction fan, by the air intake outside housing, air contacts with the electrolyte of spray head ejection in housing, and airborne formaldehyde dissolves in electrolyte and with electrolyte and falls into the 3 D electrode reactor electrolytic separation.So-called electrolyte is metabisulfite solution, and concentration is 3-5%, separately adds 0.5-2% sodium carbonate, and bottom is blown into air-flow by the micropore of gas conduit, makes active carbon produce upper and lower fierceness and stirs.Produce H after energising in cathodic region 2o 2, in the situation that being catalyst formaldehyde, active carbon is oxidized to formic acid, and formic acid reacts with sodium carbonate and generates sodium formate, and sodium formate is nonhazardous material and easily by the CO that bacterium is decomposed in cloaca 2and H 2o., waste liquid do not cause secondary environmental pollution, so can directly discharge.
Further, for the contact-making surface that makes air and electrolyte is larger, the present invention also comprises a casing, and described casing is arranged in housing, and described casing top offers an air outlet, and the suction opeing sealing of air outlet and extraction fan is joined; Described spray head is arranged on the inside top of casing, the below that is positioned at spray head in described casing is provided with fixed railing formula filler, this fixed railing formula filler mainly is comprised of with two vertical parallel thin plates some solid strip, some solid strip are horizontal random interval and are staggered between two vertical parallel thin plates, also be provided with the casing air inlet on the bottom sidewall of described casing, be positioned at bottom half and be provided with the electrolyte liquid outlet, the electrolyte liquid outlet is over against the 3 D electrode reactor of below.
Be interspersed and formed fixed railing formula filler by many solid strip random intervals, the electrolyte of spray head ejection falls into the solid strip and forms liquid film on solid strip surface; By extraction fan, from the air of the air inlet suction of housing, between the solid strip, with electrolyte, contacted, airborne formaldehyde dissolves in electrolyte, follows electrolyte and falls into three-dimensional electrode reactor pond Reaction Separation.
Described box inside also is provided with mesh-structured air distributor between fixed railing formula filler and casing air inlet.The cross section of above-mentioned solid strip is circle, ellipse, triangle, square or polygon; The material of this solid strip is plastics, bamboo material, timber, stalk, pottery or metal tube.
Described 3 D electrode reactor comprises anode flat plate, negative electrode flat board, granule electrode and cell body, the material of described anode flat plate is high purity graphite, the material of negative electrode flat board is stainless steel, the material of granule electrode is the activated carbon granule that surface modification has catalytic activity, and the size of the particle diameter of this activated carbon granule is 3-5mm.Described activated carbon granule is filled between two plate electrodes; Negative and positive two stage distances are for generally electing 3cm as; Additional power source adopts program switching mode power supply to power in the direct current mode, the input voltage 4-20V of each 3 D electrode reactor, input current 2-5A.Reactor is in parallel or be in series by a plurality of Using Electrochemical Reactor with Three-dimensional Electrode reactors as required.
Several described 3 D electrode reactors successively side by side, between two 3 D electrode reactors that face mutually, be equipped with for the electrolyte in reactor, mutually flow be provided with overfall A, described electrolyte liquid outlet is over against one of side in several 3 D electrode reactors.
An air blast and air-blast connection pipe also are set in described housing, be positioned at other being provided with for air blast of air blast on described housing and absorb the housing air intlet B that the hull outside air is used, described air-blast connection pipe one end is connected with the air outlet of air blast, and the other end inserts the bottom of 3 D electrode reactor.High pressure draught blows activated carbon granule in reactor and stirs, and forms Dynamic Adsorption, and formaldehyde is enriched in above active carbon.
Two of purpose of the present invention is achieved through the following technical solutions:
(1) formaldehyde is dissolved in to contain concentration be 3-5%Na to the interaction by the extraction fan in air purifier and electrolyte spray head 2sO 4with concentration be 0.5-2%Na 2cO 3na 2sO 4-Na 2cO 3in mixed electrolytic solution;
(2) electrolyte that step (1) is dissolved with formaldehyde vertically flows in 3 D electrode reactor, this 3 D electrode reactor comprises that anode flat plate, negative electrode are dull and stereotyped, granule electrode and cell body, the activated carbon granule of described granule electrode for using for absorbing formaldehyde catalytic degradation formaldehyde;
(3) 3 D electrode reactor being passed into to voltage is 4-20V, the DC current that electric current is 2-5A, and the formaldehyde that makes to be dissolved in electrolyte is oxidized to sodium formate.
Further, in above-mentioned steps (2) when passing into DC current, also from the bottom of 3 D electrode reactor, be blown into the high pressure draught of 1-7KPa, activated carbon granule in reactor is stirred, form Dynamic Adsorption, enrichment formaldehyde degradation of formaldehyde, with the oxidation of formaldehyde formic acid, then change into sodium formate and stay regularly discharge in solution.
The anode flat plate of described 3 D electrode reactor is high purity graphite, and the negative electrode flat board is stainless steel, and the activated carbon granule of granule electrode is the activated carbon granule that surface modification has catalytic activity, and its particle diameter is 3-5mm.
In order fully to use electrolyte, the reacted electrolyte of above-mentioned steps (2) is back in step (1) again for dissolving formaldehyde.
Compared to prior art, the invention has the advantages that:
A kind of electro-catalyzing air purifier, can carry out anodizing, catalytic oxidation, enrichment and degraded repeatedly to airborne formaldehyde, reaches the fast purification of air.
1, air flow channel is set, realizes room air Rapid Circulation running, the purpose of separating fast formaldehyde composition contained in air, wherein, be crucial for the setting of the casing (calling air cleaning unit in the following text) of air cleaning.The present invention adopts fixed railing formula absorbent bed (fixed railing formula filler); Use this device to compare with other device to have advantages of as follows: air resistance is little, and resistance can solve by the distance of adjusting strip; Filler is not easy to stop up to each other, even stop up, also easily removes the washing refitting, guarantees that the mutual handing-over of electrolyte and air is flowed.
Its flow process can be summarized as follows:
Room air → housing air intlet A → air cleaning unit → extraction fan → gas outlet → interior space
2, the circulate electrolyte runner is set, accelerates the cycle operation of electrolyte, realize the fast degradation of formaldehyde.Described circulate electrolyte runner is comprised of reservoir, circulating pump, spray head, air cleaning unit, 3 D electrode reactor etc.
Its flow process can be summarized as follows:
Storage tank liquid → electrolyte circulating pump → spray head → air cleaning unit → 3 D electrode reactor → reservoir.
3, compression air flow channel: formed by air blast, 3 D electrode reactor, air cleaning unit, extraction fan, gas outlet.
Its flow process can be summarized as follows:
Room air → housing air intlet B → air blast → 3 D electrode reactor → air cleaning unit → extraction fan → gas outlet → interior space.
The accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of the present invention.
Fig. 2 is the right view of Fig. 1.
Fig. 3 is the structural representation of 3 D electrode reactor in Fig. 1.
Label declaration: 1 housing; 2 electrolyte circulating pumps; 3 extraction fans; 4 spray heads; 53 D electrode reactors; 6 reservoirs; 7 housing air intlet A; 8 air distributors; 9 casings; 10 air outlets; 11 fixed railing formula fillers; 14 casing air inlets; 15 electrolyte liquid outlets; 16 air blasts; 17 air-blast connection pipes; 18 housing air intlet B; 19 air guide devices; 20 gas outlets; 21 electrolyte filling openings; 22 electrolyte floss holes; 23 overfall A; 24 overfall B.
The specific embodiment
Below in conjunction with Figure of description and embodiment, content of the present invention is elaborated:
Be the embodiment schematic diagram of a kind of electro-catalyzing air purifier provided by the invention as illustrated in fig. 1 and 2, it comprises housing 1, electrolyte circulating pump 2 and from top to bottom is successively set on extraction fan 3, spray head 4, several 3 D electrode reactors 5 and the reservoir 6 in housing 1; Be positioned on described housing 1 on the sidewall of reservoir 6 tops and offer housing air intlet A7, the suction inlet of described electrolyte circulating pump 2 connects reservoir 6, pump discharge is connected with spray head 4, the spray of described spray head 4 electrolyte out falls into 3 D electrode reactor 5, and the suction opeing of described extraction fan 3 is positioned at spray head 4 tops; Offer the gas outlet 20 of at least one on the housing 1 of described extraction fan 3 tops.
An air blast 16 and air-blast connection pipe 17 also are set in described housing 1, be positioned at other being provided with for air blast 16 of air blast 16 on described housing 1 and absorb the housing air intlet B18 that housing 1 extraneous air is used, described air-blast connection pipe 17 1 ends are connected with the air outlet of air blast 16, and the other end inserts the bottom of 3 D electrode reactor 5.
By extraction fan 3, by the air intake outside housing 1, air contacts with the electrolyte of spray head 4 ejections in housing 1, and airborne formaldehyde dissolves in electrolyte and falls into 3 D electrode reactor 5 electrolytic separation.
In order to strengthen the air suction efficiency of extraction fan 3, also be provided with an air guide device 19 between extraction fan 3 and suction opeing, whole air guide device 19 is the truncated cone shape.On the lower corner of reservoir 6, offer for discharging the electrolyte floss hole 22 of used for electrolyte, reservoir 6 tops are positioned on the sidewall of housing 1 and offer an electrolyte filling opening 21 of using for the electrolyte liquid feeding.
As shown in Figures 2 and 3, several described 3 D electrode reactors 5 successively side by side, what between two 3 D electrode reactors 5 that face mutually, for the electrolyte in reactor, mutually flow is provided with overfall A23, and described electrolyte liquid outlet 15 is over against one of side in several 3 D electrode reactors 5.Separately offering one away from the 3 D electrode reactor 5 on a side of electrolyte liquid outlet allows the electrolyte in reactor flow into the overfall B24 in reservoir 6.Like this, after the capacity of the 3 D electrode reactor 5 of side is full, can automatic overflow to adjacent 3 D electrode reactor 5, overflow to opposite side 3 D electrode reactor 5 overflows back and falls into reservoir 6 by overfall B according to this.So, absorb the electrolytic separation of the electrolyte of formaldehyde through a plurality of 3 D electrode reactors 5, reached the effect of sharing formaldehyde fully.A plurality of Using Electrochemical Reactor with Three-dimensional Electrode reactors parallel connections or series connection, power acquisition is powered by the direct current mode, and the input voltage of each 3 D electrode reactor 5 is 4-20V, input current 2-5A.The quantity of 3 D electrode reactor 5 can be determined according to the ionizing power of 3 D electrode reactor 5 and the flow rate of electrolyte, that is to say according to the size of careat and determine, as in the present embodiment according to effective formaldehyde amount of room air, 3 D electrode reactor 5 is selected 3-5.
Above-mentioned 3 D electrode reactor 5 is a kind of electrochemical reactors, two plate electrodes (anode flat plate and negative electrode flat board), granule electrode and cell body, consist of, wherein, the material of anode flat plate is high purity graphite, the material of negative electrode flat board is stainless steel, and negative and positive two stage distances are 3cm the best; Granule electrode is the activated carbon granule that surface modification has catalytic activity, and the particle size of this activated carbon granule is 3-5mm.Electrolyte is selected metabisulfite solution, and concentration is 3-5%, separately adds sodium carbonate, and the concentration of sodium carbonate is 0.5-2%, and bottom is blown into air-flow by the micropore of air-blast connection pipe 17, makes active carbon produce upper and lower fierceness and stirs.Produce H after energising in cathodic region 2o 2, in the situation that being catalyst formaldehyde, active carbon is oxidized to formic acid, and formic acid reacts with sodium carbonate and generates sodium formate, and sodium formate is nonhazardous material and easily by the CO that bacterium is decomposed in cloaca 2and H 2o, do not cause secondary environmental pollution, so waste liquid can directly discharge.
In 3 D electrode reactor due to the surface area that has improved greatly electrode that adds of granule electrode, the active carbon specific area is generally up to 500~1700m2g-1, therefore be again that lyophobic dust has stronger adsorption capacity PARA FORMALDEHYDE PRILLS(91,95) to the formaldehyde dissolved in water and plays concentration of formaldehyde that enrichment build up at activated carbon surface far above the main body solution concentration, greatly improve formaldehyde by the speed of anodizing also, and then can significantly reduce energy consumption.Active carbon has stronger adaptive capacity to the variation of water quality, water temperature and the water yield in addition, adsorbs saturated active carbon and is reused by the continuous oxidation regeneration of electrode, reduces maintenance cost.
It is that adsorption process and electrolytic process are combined that active carbon is filled the electrolysis method, in electrolysis reactor, adds active carbon, is equivalent to original two dimensional electric field is converted into to three-dimensional electric field, and reaction interface increases, thereby has produced more microbubble.The microbubble produced has carried out forced convertion to solution, and the mass transfer velocity of the diffusion mass transfer process on electrode is greater than the mass transfer velocity of the diffusion mass transfer process on the two-dimensional flat plate electrode, thereby has accelerated mass transfer in liquid phase speed.Activated carbon surface of the present invention contains nitrogen-containing functional group and nanosized copper oxide in addition, has this adsorption process of great catalytic capability and degradation process and combines and improve reaction speed and lower energy consumption.
The selection of granule electrode is the key issue of reactor design, general filled conductive particle and insulating particle in the multipole 3 D electrode reactor, and the purpose that adds insulating particle is that activated carbon particles is separated with conducting particles, prevents from forming short circuit current.Yet in actual applications, often density and the particle diameter due to bi-material differs larger, under the long-term percussion of current, makes conducting particles and insulating particle layering, thereby cause short circuit current to increase, current efficiency descends.Adopt the activated carbon granule of surface modification in this test, the bulk density that its bulk density is 400mg/ml-1.5mg/ml and insulating particle is more or less the same, under the aeration effect, active carbon can be scattered between two-plate more uniformly, effectively reduced short circuit current, therefore without additional insulating particle.
Polar plate spacing is apparent on the impact of electrolysis effectiveness, it affects mass transfer distance and the electrode potential of solution, in 3 D electrode reactor, distance between pole plate is little, correspondingly reduced the mass transfer of convection current, diffusion mass transfer apart from the concentration gradient that has increased mass transfer, speed and the efficiency of having strengthened the mass transfer effect electrochemical reaction all are improved, and then improve the degradation efficiency of formaldehyde.But the too small stability that can affect operation of spacing, the loading that is related to granule electrode, less electrode spacing can obtain higher current density simultaneously, but when dwindling electrode spacing, the loading of granule electrode reduces accordingly, consider these factors, and, by test repeatedly, in this test, the spacing setting of electrode is 3.0cm.
The pollution of granule electrode is another key issue of 3 D electrode reactor design.In the 3 D electrode reactor reactor, polluter is trapped the granule electrode surface, and on its surface, redox reaction occurs.But after the 3 D electrode reactor long-play, because the suspension in sewage, pollutant and intermediates thereof tend to absorption or be deposited on electrode surface, cause electrode surface to stop up, granule electrode is contaminated.Once granule electrode is contaminated, the particle particle just loses it and holds back and the ability of pollution degradation material, thereby causes current efficiency to descend.In the present invention, by air blast, to 3 D electrode reactor, provide pressure-air, the granule electrode of three-diemsnional electrode is played to the effect of aeration.In the reactor running, the bubble that aeration produces is constantly washed away pole plate and activated carbon grain sub-surface, can prevent preferably suspension, pollutant and difficult degradation intermediate product in the electrolyte deposition at electrode surface, make the 3 D electrode reactor can long-time steady operation.Aeration also plays following four effects in addition: (1) makes activated carbon granule in mobile, dispersed, sensed formation repolarization granule electrode under high-gradient electric field; (2) strengthened mass transport process; (3) provide sufficient oxygen to system, reduction reaction can occur and change strong oxidizer (as hydrogen peroxide etc.) in the oxygen in solution on working electrode or negative electrode, thus oxidize contaminants indirectly; (4) further airborne formaldehyde is dissolved in electrolyte, increases the concentration of formaldehyde in electrolyte.
Further, for the contact-making surface that makes air and electrolyte is larger, the present invention also comprises a casing 9, and described casing 9 is arranged in housing 1, and described casing 9 tops offer an air outlet 10, and air outlet 10 joins with the suction opeing sealing of extraction fan 3; Described spray head 4 is arranged on the inside top of casing 9, the below that is positioned at spray head 4 in described casing 9 is provided with fixed railing formula filler 11, this fixed railing formula filler 11 mainly is comprised of with two vertical parallel thin plates some solid strip, some solid strip are horizontal random interval and are staggered between two vertical parallel thin plates, also be provided with casing air inlet 14 on the bottom sidewall of described casing 9, be positioned at casing 9 bottoms and be provided with electrolyte liquid outlet 15, electrolyte liquid outlet 15 is over against the 3 D electrode reactor 5 of below.
Be interspersed and formed fixed railing formula filler 11 by many solid strip random intervals, the electrolyte of spray head 4 ejections falls into the solid strip and forms liquid film on solid strip surface; By extraction fan 3, from the air of the air inlet suction of housing 1, between the solid strip, with electrolyte, contacted, airborne formaldehyde dissolves in electrolyte, follows electrolyte and falls into three-dimensional electrode reactor pond Reaction Separation.
Contact more evenly with electrolyte in order to make to be inhaled into air in casing 9, also be provided with mesh-structured air distributor 8 between fixed railing formula filler 11 and casing air inlet 14 in casing 9 inboards.After air is inhaled into, after the rectification distribution of air distributor 8, can make the solid strip in casing 9 all contact outer " newly " air of self purifire, reach the effect of abundant dissolving; The mesh of air distributor 8 is also the casing 9 electrolyte insides passages of circulation downwards simultaneously.
The area that the shape of cross section of solid strip is generally pressed cross section is large as far as possible, and surfacing, is not with dead angle to select, in order to clean, uses.So the cross section of solid strip is generally elected circle, ellipse, triangle, square or polygon as; The material of solid strip can be plastics, bamboo material, timber, stalk, pottery or metal tube.
The present invention also provides a kind of electro-catalysis air purification method, and it comprises the following steps:
(1) formaldehyde is dissolved in to contain concentration be 3-5%Na to the interaction by the extraction fan in air purifier and electrolyte spray head 2sO 4with concentration be 0.5-2%Na 2cO 3na 2sO 4-Na 2cO 3in mixed electrolytic solution (hereinafter to be referred as electrolyte);
(2) electrolyte that step (1) is dissolved with to formaldehyde vertically flows in 3 D electrode reactor, and this 3 D electrode reactor comprises that anode flat plate, negative electrode are dull and stereotyped, granule electrode and cell body, the activated carbon granule of described granule electrode for using for absorbing formaldehyde;
(3) 3 D electrode reactor being passed into to voltage is 4-20V, the DC current that electric current is 2-5A, and the formaldehyde that makes to be dissolved in electrolyte is oxidized to sodium formate.
When passing into DC current, also from the bottom of 3 D electrode reactor, be blown into the high pressure draught of 1-7KPa in described step (2), the activated carbon granule in reactor is stirred, form Dynamic Adsorption, enrichment formaldehyde degradation of formaldehyde.
The anode flat plate of described 3 D electrode reactor is high purity graphite, and the negative electrode flat board is stainless steel, and the activated carbon granule of granule electrode is the activated carbon granule that surface modification has catalytic activity, and its particle size is 3-5mm.
The reacted electrolyte of described step (2) is back in step (1) again for dissolving formaldehyde.
Example 1
(1) formaldehyde is dissolved in to contain concentration be 3%Na to the interaction by the extraction fan in air purifier and electrolyte spray head 2sO 4with concentration be 2%Na 2cO 3electrolyte in;
(2) electrolyte that step (1) is dissolved with to formaldehyde vertically flows in 3 D electrode reactor, and this 3 D electrode reactor comprises that anode flat plate, negative electrode are dull and stereotyped, granule electrode and cell body, the activated carbon granule of described granule electrode for using for absorbing formaldehyde; Anode flat plate is high purity graphite, and the negative electrode flat board is stainless steel, and activated carbon granule is the activated carbon granule that surface modification has catalytic activity, and its particle diameter is 4mm.
(3) be blown into the high pressure draught of 7KPa from the bottom of 3 D electrode reactor, the activated carbon granule in reactor is stirred, form Dynamic Adsorption, enrichment formaldehyde degradation of formaldehyde.
(4) 3 D electrode reactor being passed into to voltage is 4V, the DC current that electric current is 2A, and the formaldehyde that makes to be dissolved in electrolyte is oxidized to sodium formate.
(5) the reacted electrolyte of step (4) is back in step (1) again for dissolving formaldehyde.
Example 2
(1) formaldehyde is dissolved in to contain concentration be 5%Na to the interaction by the extraction fan in air purifier and electrolyte spray head 2sO 4with concentration be 0.5%Na 2cO 3electrolyte in;
(2) electrolyte that step (1) is dissolved with to formaldehyde vertically flows in 3 D electrode reactor, and this 3 D electrode reactor comprises that anode flat plate, negative electrode are dull and stereotyped, granule electrode and cell body, the activated carbon granule of described granule electrode for using for absorbing formaldehyde; Anode flat plate is high purity graphite, and the negative electrode flat board is stainless steel, and activated carbon granule is the activated carbon granule that surface modification has catalytic activity, and its particle diameter is 5mm.
(3) be blown into the high pressure draught of 4KPa from the bottom of 3 D electrode reactor, the activated carbon granule in reactor is stirred, form Dynamic Adsorption, enrichment formaldehyde degradation of formaldehyde.
(4) 3 D electrode reactor being passed into to voltage is 20V, the DC current that electric current is 5A, and the formaldehyde that makes to be dissolved in electrolyte is oxidized to sodium formate.
(5) the reacted electrolyte of step (4) is back in step (1) again for dissolving formaldehyde.
Example 3
(1) formaldehyde is dissolved in to contain concentration be 4%Na to the interaction by the extraction fan in air purifier and electrolyte spray head 2sO 4with concentration be 1%Na 2cO 3electrolyte in;
(2) electrolyte that step (1) is dissolved with to formaldehyde vertically flows in 3 D electrode reactor, and this 3 D electrode reactor comprises that anode flat plate, negative electrode are dull and stereotyped, granule electrode and cell body, the activated carbon granule of described granule electrode for using for absorbing formaldehyde; Anode flat plate is high purity graphite, and the negative electrode flat board is stainless steel, and activated carbon granule is the activated carbon granule that surface modification has catalytic activity, and its particle diameter is 3mm.
(3) be blown into the high pressure draught of 1KPa from the bottom of 3 D electrode reactor, the activated carbon granule in reactor is stirred, form Dynamic Adsorption, enrichment formaldehyde degradation of formaldehyde.
(4) 3 D electrode reactor being passed into to voltage is 12V, the DC current that electric current is 3.5A, and the formaldehyde that makes to be dissolved in electrolyte is oxidized to sodium formate.
(5) the reacted electrolyte of step (4) is back in step (1) again for dissolving formaldehyde.
Electricity oxidation mechanism of the present invention:
Compare and there are following characteristics with manufacturing process of the same type according to this technique:
(1) have and improve the effect that catalytic activity reduces operating cost
Because reactor of the present invention is to using cheap electric energy as excitation energy, take air as raw material, produce two electron reductions on granule electrode, produce the H with certain oxidisability 2o 2, its reaction equation is as follows:
O 2+2H ++2e -→H 2O 2????(1)
The H of these nascent states 2o 2under the catalysis of activated carbon particles, produce the extremely strong hydroxyl radical free radical of oxidisability:
H 2O 2+M XO Y(M)+H +→OH·+M X-+H 2O????(2)
(in formula, M is metal)
Secondly, the granule electrode used is special active carbon, has very big specific area, and extremely strong suction-operated is arranged, thereby the organic matter in water is played to enrichment; Activated carbon surface has special nitrogen-containing functional group and Nanometer Copper or its oxide, and extremely strong catalytic action is arranged; So that the highly active OH-in granule electrode surface before by the hydrone cancellation, has an opportunity to contact with organic molecule, so can be quickly and effectively and mineralising organic pollution up hill and dale; Reaction equation is as follows:
OH+R → CO 2+ inorganic ions (3)
(in formula, R is organic matter)
By above (1)-(3), analyze known: cheap electric energy and raw material, and rapid-action speed, inevitable decrease operating cost, estimation can be saved electric energy more than 30%.
(2) electrode active carbon of the present invention mainly adopts the nitride modification, makes in active carbon to form a certain amount of nitrogen-containing functional group and pyrroles's key; Adopt the copper compound modification to make activated carbon surface be uniformly distributed the particulate of a large amount of nano level copper or copper compound, make carbon surface form countless catalytic active centers; These two measures can improve the catalytic capability of electrode activity charcoal greatly, and according to test: containing 2% formaldehyde waste water, at normal pressure, under temperature 60 C, electrolysis 30min. degradation rate reaches more than 97%, and electrolysate is the nontoxic lower fatty acid easily be degraded by microorganisms or its esters; Therefore, activated carbon electrodes of the present invention can replace being loaded with the activated carbon electrodes of platinum, ruthenium or rare earth metal fully; Owing to avoiding adopting rare precious metal, be raw material, thereby the manufacturing cost that greatly reduces electrode and reactor is conducive to suitability for industrialized production.
The checking of air purifier PARA FORMALDEHYDE PRILLS(91,95) removal effect of the present invention:
About the assessment of air purifier quality, there is no national standard as foundation; The present invention adopts industry to habitually practise way (Li Yuhua etc., New filling type air purifier purifying formaldehyde effect and calculating simulation, environmental science 9,2008) and is measured, and its method is as follows:
(1) the present invention tests and adopts the following small electrical catalytic air purifier of working out:
Power (w): 30-60;
Air quantity (m 3/ h): 100-300;
Noise (dB): 35-50;
Applicable room area (m 2): 30;
Application places: bedroom, parlor, office, accounting office, playroom etc.
(2) mensuration of formaldehyde clearance:
The step of measuring is as follows:
1. test at 30m 3toilet in carry out, room is hedged off from the outer world fully, seal is good;
2. before the experiment, room air is detected, require the detectability of concentration of formaldehyde lower than the empty standard of state, in experimentation, place pollution sources, fan and small electrical catalytic air purifier in room;
3. small electrical catalytic cleaner and fan are put into to the experiment room, place pollution sources simultaneously, be the formalin that mass fraction is 37%, make its volatilization by the heating of PARA FORMALDEHYDE PRILLS(91,95) solution, open fan simultaneously and carry out the air mixing, in certain hour, select several test points indoor, continuous sampling is analyzed, and understands its Natural Attenuation rule, and the uniformity of definite indoor formaldehyde concentration distribution;
4. after understanding the formaldehyde natural decay rate, start the purifying formaldehyde test, in measuring cell, after initial concentration of formaldehyde, open small electrical catalytic air purifier of the present invention, it is 60min that clarifier is opened test period;
5. the sample gathered is with reference to GB/T15516-1995 " mensuration of air quality-formaldehyde-acetylacetone,2,4-pentanedione AAS " and adopt UV-160A type spectrophotometer to be analyzed.
Experimental result is as following table:
Table 1 small electrical catalytic air purifier formaldehyde is eliminated information slip as a result
Above-mentioned experiment shows: no matter the indoor formaldehyde initial concentration how, after small electrical catalytic air purifier of the present invention is processed 60min., its degradation rate is all more than 92%, illustrates that air purifier has a good degradation to indoor.

Claims (10)

1. an electro-catalyzing air purifier is characterized in that: it comprises housing (1), electrolyte circulating pump (2) and from top to bottom is successively set on extraction fan (3), spray head (4), several 3 D electrode reactors (5) and the reservoir (6) in housing (1); Be positioned on described housing (1) on the sidewall of reservoir (6) top and offer housing air intlet A(7), the suction inlet of described electrolyte circulating pump (2) connects reservoir (6), the circulate electrolyte pump discharge is connected with spray head (4), the spray electrolyte out of described spray head (4) falls into 3 D electrode reactor (5), the suction opeing of described extraction fan (3) is positioned at spray head (4) top, offers the gas outlet (20) of at least one on the housing (1) of described extraction fan (3) top.
2. electro-catalyzing air purifier according to claim 1, it is characterized in that: it also comprises a casing (9), described casing (9) is arranged in housing (1), described casing (9) top offers an air outlet (10), and air outlet (10) joins with the suction opeing sealing of extraction fan (3), described spray head (4) is arranged on the inside top of casing (9), the below that is positioned at spray head (4) in described casing (9) is provided with fixed railing formula filler (11), this fixed railing formula filler (11) mainly is comprised of with two vertical parallel thin plates some solid strip, some solid strip are horizontal random interval and are staggered between two vertical parallel thin plates, also be provided with casing air inlet (14) on the bottom sidewall of described casing (9), be positioned at casing (9) bottom and be provided with electrolyte liquid outlet (15), electrolyte liquid outlet (15) is over against the 3 D electrode reactor (5) of below.
3. electro-catalyzing air purifier according to claim 2, it is characterized in that: described casing (9) inboard is positioned between fixed railing formula filler (11) and casing air inlet (14) and also is provided with mesh-structured air distributor (8).
4. according to the described electro-catalyzing air purifier of claim 2 or 3, it is characterized in that: several described 3 D electrode reactors (5) successively side by side, between two 3 D electrode reactors (5) that face mutually, be equipped with for the electrolyte in reactor, mutually flow be provided with overfall A(23), described electrolyte liquid outlet (15) is over against one of side in several 3 D electrode reactors (5).
5. according to claim 1,2 or 3 described electro-catalyzing air purifiers, it is characterized in that: described 3 D electrode reactor (5) comprises anode flat plate, negative electrode flat board, granule electrode and cell body, the material of described anode flat plate is high purity graphite, the material of negative electrode flat board is stainless steel, the material of granule electrode is the activated carbon granule that surface modification has catalytic activity, and the size of the particle diameter of this activated carbon granule is 3-5mm.
6. according to claim 1,2 or 3 described electro-catalyzing air purifiers, it is characterized in that: an air blast (16) and air-blast connection pipe (17) also are set in described housing (1), be positioned at other being provided with for air blast (16) of air blast (16) on described housing (1) and absorb the housing air intlet B(18 that housing (1) extraneous air is used), described air-blast connection pipe (17) one ends are connected with the air outlet of air blast (16), and the other end inserts the bottom of 3 D electrode reactor (5).
7. an electro-catalysis air purification method, it is characterized in that: it comprises the following steps:
(1) formaldehyde is dissolved in to contain concentration be 3-5%Na to the interaction by the extraction fan in air purifier and electrolyte spray head 2sO 4with concentration be 0.5-2%Na 2cO 3na 2sO 4-Na 2cO 3in mixed electrolytic solution;
(2) electrolyte that step (1) is dissolved with to formaldehyde vertically flows in 3 D electrode reactor, this 3 D electrode reactor comprises that anode flat plate, negative electrode are dull and stereotyped, granule electrode and cell body, the activated carbon granule of described granule electrode for using for absorbing formaldehyde catalytic degradation formaldehyde;
(3) 3 D electrode reactor being passed into to voltage is 4-20V, the DC current that electric current is 2-5A, and the formaldehyde that makes to be dissolved in electrolyte is oxidized to sodium formate.
8. electro-catalysis air purification method according to claim 7, it is characterized in that: in described step (2) when passing into DC current, also from the bottom of 3 D electrode reactor, be blown into the high pressure draught of 1-7KPa, activated carbon granule in reactor is stirred, form Dynamic Adsorption, enrichment formaldehyde degradation of formaldehyde.
9. according to the described electro-catalysis air purification method of claim 7 or 8, it is characterized in that: the anode flat plate of described 3 D electrode reactor is high purity graphite, the negative electrode flat board is stainless steel, the activated carbon granule of granule electrode is the activated carbon granule that surface modification has catalytic activity, and its particle diameter is 3-5mm.
10. according to the described electro-catalysis air purification method of claim 7 or 8, it is characterized in that: the reacted electrolyte of described step (2) is back in step (1) again for dissolving formaldehyde.
CN201310438250.9A 2013-09-24 2013-09-24 A kind of electro-catalyzing air purifier and the method for purification of air Expired - Fee Related CN103463974B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104587793A (en) * 2015-01-03 2015-05-06 浙江理工大学 Biomimetic catalysis formaldehyde removal air purifier
CN106288003A (en) * 2016-08-02 2017-01-04 王彦宸 Air purifier and air purification method
CN107626203A (en) * 2017-11-08 2018-01-26 深圳市天得环境科技有限公司 The apparatus and method that electro-catalysis removes formaldehyde
CN107694333A (en) * 2017-11-08 2018-02-16 深圳市天得环境科技有限公司 Formaldehyde absorbent and its compound method available for electrolysis

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2529646Y (en) * 2001-10-26 2003-01-08 窦伟 Photocatalysis air purifier
CN2560346Y (en) * 2002-07-17 2003-07-16 陈述增 Air purifier
JP2004313893A (en) * 2003-04-15 2004-11-11 Esupo Kk Packing material for cleaning gas and system for cleaning contaminated gas
CN2844750Y (en) * 2005-11-23 2006-12-06 颜小亮 The room air cleaning machine
CN202576054U (en) * 2012-05-09 2012-12-05 武汉钢铁(集团)公司 Three-dimensional electrode reaction device
CN102824834A (en) * 2012-08-23 2012-12-19 华南理工大学 Apparatus for removing trace acidic gas in indoor air, and method and application thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2529646Y (en) * 2001-10-26 2003-01-08 窦伟 Photocatalysis air purifier
CN2560346Y (en) * 2002-07-17 2003-07-16 陈述增 Air purifier
JP2004313893A (en) * 2003-04-15 2004-11-11 Esupo Kk Packing material for cleaning gas and system for cleaning contaminated gas
CN2844750Y (en) * 2005-11-23 2006-12-06 颜小亮 The room air cleaning machine
CN202576054U (en) * 2012-05-09 2012-12-05 武汉钢铁(集团)公司 Three-dimensional electrode reaction device
CN102824834A (en) * 2012-08-23 2012-12-19 华南理工大学 Apparatus for removing trace acidic gas in indoor air, and method and application thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
黎泽彬: "一种基于三维电极电解体系的甲醛消除方法", 《第22届广州市青少年科技创新大赛获奖作品集化学》, 31 July 2008 (2008-07-31), pages 24 - 31 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104587793A (en) * 2015-01-03 2015-05-06 浙江理工大学 Biomimetic catalysis formaldehyde removal air purifier
CN104587793B (en) * 2015-01-03 2016-09-28 浙江理工大学 A kind of bionic catalysis removes the air purifier of formaldehyde
CN106288003A (en) * 2016-08-02 2017-01-04 王彦宸 Air purifier and air purification method
CN107626203A (en) * 2017-11-08 2018-01-26 深圳市天得环境科技有限公司 The apparatus and method that electro-catalysis removes formaldehyde
CN107694333A (en) * 2017-11-08 2018-02-16 深圳市天得环境科技有限公司 Formaldehyde absorbent and its compound method available for electrolysis

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