CN113266914A - Falling film absorption air purifier for removing indoor formaldehyde - Google Patents
Falling film absorption air purifier for removing indoor formaldehyde Download PDFInfo
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- CN113266914A CN113266914A CN202110551939.7A CN202110551939A CN113266914A CN 113266914 A CN113266914 A CN 113266914A CN 202110551939 A CN202110551939 A CN 202110551939A CN 113266914 A CN113266914 A CN 113266914A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
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Abstract
The invention discloses a falling film absorption air purifier for removing indoor formaldehyde, and relates to the field of air purification. The indoor air is sent into an air purification column containing an adsorbent by a fan or other air-sending machines, water enters from the top of the purification column in a spraying mode, then airflow from bottom to top is fully contacted and absorbed with water flow from top to bottom, the water finally flows into a water storage tank below the machine body, the steps are repeated, water recycling is formed, and the treated purified air is discharged from a top air outlet. The formaldehyde remover has the advantages of quick and strong removal function on indoor formaldehyde and other volatile compounds, long service cycle of equipment, easy maintenance, suitability for newly-installed and repaired places such as large office areas, meeting rooms, entertainment places and the like, and is also suitable for regular air treatment of large public activity areas such as meetings, stadiums and the like, and quick formaldehyde removal and indoor air purification in places such as hospitals, professional laboratories and the like.
Description
Technical Field
The invention belongs to the technical field of air purification, and particularly relates to a falling film absorption method for removing indoor formaldehyde.
Background
With the development of economy and science and technology, the social progress, the living standard is increasingly improved, various indoor decorations are more and more popularized, people pay more and more attention to the living environment of the people, and the indoor decoration is hot. The number of indoor decoration materials is not large, the variety is wide, and the use of various additives is more and more extensive. The decorated room always has pungent smell, and the retention time is long, so people can have bad reactions such as dizziness, dazzling, sore throat, chest distress and the like, which are mostly visual manifestations of formaldehyde harm. According to the analysis of indoor air detection data all over the country, the decorated indoor air has air pollution of different degrees, wherein the formaldehyde pollution is the most serious and can be released into the air at normal temperature. The main sources of indoor formaldehyde are indoor decoration materials and furniture, especially artificial boards bonded by urea-formaldehyde resin and phenolic resin. The selection of the air purifier is an internationally recognized important method for improving the indoor air quality at present, and along with the enhancement of health consciousness and the improvement of living standard of residents in China, the indoor air purification is just needed by families in the post epidemic situation era.
The air purifier mainly adopts the technologies of mechanical filtration, electrostatic electret filter screen, high-voltage electrostatic dust collection and the like for removing particles in air. The adsorption capacity of the filter screen in the mechanical filtration and electrostatic electret filter screen methods is limited, so that when the adsorption is saturated or is about to be saturated, serious secondary pollution is caused when the filter screen is continuously used, and the filter screen needs to be replaced regularly. High-voltage electrostatic dust collection cleaning is troublesome and time-consuming, ozone is easily generated to form secondary pollution, and independent electrostatic dust collection purifiers are definitely forbidden to be sold in the civil market in some countries. The methods of mechanical filtration, electrostatic electret filter screen and high-voltage electrostatic dust collection are basically unable to effectively remove formaldehyde in indoor air, and the existing indoor formaldehyde removal methods mainly include activated carbon adsorption and photocatalyst catalytic decomposition technologies. The adsorption capacity of activated carbon in the activated carbon adsorption process is limited and the adsorbed contaminants may be re-liberated. The photocatalytic decomposition technology must be able to function under the irradiation of visible light or ultraviolet rays, and is inconvenient to apply.
Chinese patent CN103727598A discloses a device for removing indoor formaldehyde, which is characterized in that the device comprises a formaldehyde detector; a heating device; an air suction port and an air exhaust port; the formaldehyde filtering device comprises a heat-insulating sealed shell and a first filter, wherein the first filter is arranged in the heat-insulating sealed shell and comprises a first sealed box body and a plurality of filter discs, small boxes are fixed on the surface of each filter disc, a formaldehyde remover is contained in each small box, a plurality of small holes are formed in the surface of each small box, a first air inlet and a first air outlet are formed in the first sealed box body, the first air inlet is communicated with an air outlet through a gas pipeline, and the first air outlet is connected with an exhaust pipe; and the control device is electrically connected with the formaldehyde detector and the air exhaust device. The device can remove indoor formaldehyde with high efficiency in a short time, has a small structure, is convenient to assemble and disassemble, and has wide application space in practical application.
Chinese patent CN100998887B discloses a device for removing formaldehyde pollutants in indoor air by plasma high-efficiency oxidation with low energy consumption and no secondary pollution, which is characterized in that a dielectric barrier discharge reactor filled with a formaldehyde storage agent is adopted to alternately perform two stages of formaldehyde storage without discharge and plasma oxidation needing discharge driving. However, the time of each storage stage is 1-10 hours, and the time of each plasma oxidation stage is 5-100 minutes, so that the one-time passing purification time is long.
Chinese patent CN210473559U discloses a physical cleaning device for quickly eliminating indoor formaldehyde, which is characterized in that, the device includes a machine body, the bottom of the machine body is equipped with the removal wheel, one side of the machine body near the removal wheel is inside to be equipped with clear water atomizing humidifier, one side of the clear water atomizing humidifier far away from the removal wheel is equipped with ozone generator, one side that clear water atomizing humidifier was kept away from to ozone generator is equipped with intelligent control ware and intelligent detector side by side, one side that the machine body is near intelligent detector is equipped with clear water atomizing conveying cylinder and ozone conveying cylinder, and clear water atomizing conveying cylinder and ozone conveying cylinder link to each other with clear water atomizing humidifier and ozone generator respectively. The device needs to convey ozone, is complex to operate and is difficult to put into practical application.
Chinese patent CN205037457U discloses a formaldehyde-removing air purifier, which is characterized in that, the device is provided with an upper clapboard and a lower clapboard inside the machine body, thereby an S-shaped air circulation channel is established in the machine body, an air suction fan is arranged at the inlet at the lower part of the air circulation channel and is connected with a dust remover, a dust collector which can be extracted and ionized is arranged below the air suction fan and the dust remover, an active carbon filter element is arranged at a position close to the dust remover and is connected with the lower clapboard and the bottom of the machine body, a plurality of photocatalyst pipelines are also arranged between the lower clapboard and the bottom of the machine body, the photocatalyst pipelines are transparent and are arranged in a plurality of rows and a plurality of columns, an ultraviolet light source is arranged between each row, a negative ion generator is arranged between the upper clapboard and the lower clapboard and is in point connection with a circuit board arranged on the inner wall of the machine body, an exhaust fan is arranged at the outlet end of the pipeline at the upper end of the air circulation pipeline, and a solar electronic board is arranged to charge the battery. The device is limited to a specific space, the practicability is low, and certain defects are caused in the aspect of convenience of users.
The main flow air purifier based on the prior art has the following defects: 1. the three-way catalyst in the air purifier is composed of noble metals of platinum, germanium and palladium, and needs to be activated for 3 minutes in an environment with the temperature of more than 100 ℃ during working, and the three-way catalyst needs to be kept to work at about 80 ℃ after activation, so that an air radiator and a water cooling device need to be additionally arranged, the size and the weight are increased, and the inconvenience in use is caused. 2. In order to make the air purifier work effectively and save electricity, the automatic electric control temperature regulation is adopted, thereby increasing the cost. 3. The water sprayed, atomized and cooled is sealed in the container, but still needs to be replaced regularly (about three months), which brings trouble to users. Currently, most of the technologies disclosed in the art have the above problems, and therefore, further optimization and improvement are needed for the above problems.
Disclosure of Invention
Aiming at the defects of the prior art, the product of the invention takes falling film absorption as a principle, and the airflow from bottom to top is fully contacted with the water flow from top to bottom by forming a flowable water film in the cylindrical purifier, so that the contact area with the air is increased, and the purification efficiency is extremely high. In addition, through the design of adsorbent cooperation flowing water, realized adhering and dissolving to formaldehyde in the air, showing and increasing purifying effect, adding the long-time continuous work of hydroenergy, reduced the consumptive material cost, avoided secondary pollution.
In order to achieve the purpose, the invention adopts the technical scheme that:
the falling film absorption air purifier for removing indoor formaldehyde comprises a shell, a fan, a purifying device and a water circulation chamber, wherein the purifying device comprises a main air duct, a purifying channel and a purifying chamber, a purifying pipe and a filter are arranged in the purifying chamber, the purifying pipe is of a cylindrical structure and internally provided with an adsorbent, and the filling height of the adsorbent is 5-15 cm.
The adsorbent is one or more of activated carbon, cellulose resin, argil, seaweed meal and biomass-derived carbon, and the mass of the adsorbent is 5-10% of that of water.
The gas-liquid exchange residence time is adjusted by the flowmeter to adjust the relative flow rate of water and air, and the treatment capacity of the device is 5m within 3-6 s of residence time2The air in the room circulates once, and is purified efficiently.
The method for removing indoor formaldehyde by the falling film absorption air purifier for removing indoor formaldehyde comprises the following steps: the indoor air is sent into an air purification column containing an adsorbent by a fan or other air-sending machines, water enters from the top of the purification column in a spraying mode, then airflow from bottom to top is fully contacted and absorbed with water flow from top to bottom, the water finally flows into a water storage tank below the machine body, the steps are repeated, water recycling is formed, and the treated purified air is discharged from a top air outlet.
Compared with the prior art, the invention has the following beneficial effects: the invention has good effect of removing indoor formaldehyde. Meanwhile, dust in the air can be removed through water adsorption, and particularly, quite fine dust can be removed. The air purifier is provided with the stop valve, can artificially adjust the air quantity passing through the main air duct, is reasonable in arrangement and more reasonable in utilization, adopts a cylindrical streamline structure, and is large in purifying area, high in efficiency, simple in structure, low in cost and convenient to use.
Compared with the prior art, the invention has the following main characteristics:
1. has the function of quickly and strongly removing volatile compounds such as indoor formaldehyde and the like.
2. The product is suitable for newly-installed and repaired places such as large office areas, meeting rooms, entertainment places and the like, and is also suitable for regular air treatment of large public activity areas such as meeting places, stadiums and the like, and places such as hospitals, professional laboratories and the like, so that formaldehyde can be quickly removed and indoor air can be purified.
3. The equipment has long service life and is easy to maintain.
Drawings
Figure 1 is a falling film absorption air purifier according to the present invention. 1-water tank, 2-round hole, 3-purification pipe, 4-air inlet, 5-water storage tank, 6-liquid inlet, 7-air outlet, 8-water circulation chamber, 9-liquid outlet, 10-purification chamber, 13-booster pump, 14-sieve plate and 15-liquid separation plate.
Figure 2 is a falling film absorption air purifier according to the present invention. 3-purifying tube, 11-conical funnel, 12-bracket.
FIG. 3 shows a purge tube. 1-water tank, 3-purification pipe, 4-air inlet, 7-air outlet, 8-water circulation chamber, 10-purification chamber and 14-sieve plate.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It should be noted that the described embodiments are only a part of the invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are intended to explain and complement the invention and do not limit the scope of the invention, the process according to the invention being carried out in a purifier based on the principle of falling film absorption.
At room temperature, the indoor air is sent into an air purification column with a cylindrical streamline structure containing an adsorbent by a fan or other air sending machinery, the filling height of the adsorbent in the air purification column is 5-15 cm, formaldehyde in the air is adsorbed, filtered and removed, the adsorbent has extremely strong adsorption performance, the formaldehyde conversion and removal efficiency is not less than 98%, and the formaldehyde concentration in the air is reduced to 0.01mg/m3。
The equipment for realizing the method according to the steps comprises a shell, a fan and a purifying device, wherein the purifying device is arranged in an air outlet of the shell, and the fan is arranged in an air inlet of the shell. The purification device comprises a main air duct, a purification channel and a purification chamber, wherein the purification channel is connected with the purification chamber, a stop valve is arranged on the main air duct, and the purification channel is communicated with the main air duct.
Example 1
The air purification column is filled with adsorbent active carbon, and the filling height is 5 cm. At 5m2In the room (a), the concentration of formaldehyde in the air is 0.71mg/m3. After the purification device runs indoors for 3s, the concentration of formaldehyde in indoor air is 0.009mg/m3The conversion removal rate was 98.7%.
Example 2
The air purification column was packed with adsorbent cellulose resin at a packing height of 8 cm. At 5m2House ofIn the room, the concentration of formaldehyde in the air is 0.73mg/m3. After the purification device runs indoors for 3.3s, the concentration of formaldehyde in indoor air is 0.0082mg/m3The conversion removal rate was 98.9%.
Example 3
The air purification column is filled with adsorbent clay with a filling height of 10 cm. At 5m2In the room (a), the concentration of formaldehyde in the air is 0.67mg/m3. After the purification device runs indoors for 5s, the concentration of formaldehyde in indoor air is 0.0084mg/m3The conversion removal rate was 98.7%.
Example 4
Adsorbent seaweed powder is filled into the air purification column, and the filling height is 12 cm. At 5m2In the room, the concentration of formaldehyde in the air is 0.83mg/m3. After the purification device runs indoors for 6s, the concentration of formaldehyde in indoor air is 0.0072mg/m3The conversion removal rate was 99.1%.
Example 5
The air purification column was packed with adsorbent cellulose resin at a packing height of 15 cm. At 5m2In the room (a), the concentration of formaldehyde in the air is 0.77mg/m3. After the purification device runs indoors for 4s, the concentration of formaldehyde in indoor air is 0.008mg/m3The conversion removal rate was 99.0%.
Example 6
The air purification column is filled with adsorbent active carbon, and the filling height is 9 cm. At 5m2In the room (a), the concentration of formaldehyde in the air is 0.70mg/m3. After the purification device runs indoors for 4.5s, the concentration of formaldehyde in indoor air is 0.0082mg/m3The conversion removal rate was 98.8%.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. A falling film absorption air purifier for removing indoor formaldehyde is characterized by comprising a shell, a fan, a purifying device and a water circulation chamber, wherein the purifying device comprises a main air duct, a purifying channel and a purifying chamber, a purifying pipe and a filter are arranged in the purifying chamber, the purifying pipe is of a cylindrical streamline structure, an adsorbent is filled in the purifying pipe, and the filling height of the adsorbent is 5-15 cm.
2. The falling film absorption air purifier for removing indoor formaldehyde according to claim 1, wherein the adsorbent is one or more of activated carbon, cellulose resin, clay, seaweed meal and biomass-derived carbon, and the mass of the adsorbent is 5-10% of that of water.
3. The falling film absorption air purifier for removing indoor formaldehyde according to claim 1, wherein the gas-liquid exchange residence time is adjusted by a flow meter according to the relative flow rate of water and air, and the treatment capacity of the device is 5m within 3-6 s of residence time2The air in the room circulates once, and is purified efficiently.
4. The method for removing formaldehyde in a room by using the falling film absorption air purifier for removing formaldehyde in the room as claimed in claim 1, is characterized by comprising the following steps: the indoor air is sent into a cylindrical streamline air purifier containing an adsorbent by a fan or other air sending machines, water enters from the top of the purifying pipe in a spraying mode, then airflow from bottom to top is fully contacted and absorbed with water flow from top to bottom, the water finally flows into a water storage tank below the machine body, the steps are repeated, water recycling is formed, and the treated purified air is discharged from a top air outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110551939.7A CN113266914A (en) | 2021-05-20 | 2021-05-20 | Falling film absorption air purifier for removing indoor formaldehyde |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110551939.7A CN113266914A (en) | 2021-05-20 | 2021-05-20 | Falling film absorption air purifier for removing indoor formaldehyde |
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| Publication Number | Publication Date |
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| CN113266914A true CN113266914A (en) | 2021-08-17 |
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| CN202110551939.7A Pending CN113266914A (en) | 2021-05-20 | 2021-05-20 | Falling film absorption air purifier for removing indoor formaldehyde |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104437007A (en) * | 2014-11-03 | 2015-03-25 | 中国科学院城市环境研究所 | Formaldehyde scavenging air purifier |
| CN105091117A (en) * | 2015-09-17 | 2015-11-25 | 四川绿创环阅环保科技有限公司 | Formaldehyde removal negative-ion air cleaner |
| CN206234932U (en) * | 2016-12-02 | 2017-06-09 | 郑州大学 | A kind of air purifier |
| CN109550381A (en) * | 2017-09-26 | 2019-04-02 | 南京大东机电设备有限公司 | Indoor formaldehyde purifier |
| CN111389154A (en) * | 2020-03-30 | 2020-07-10 | 常州大学 | Falling film absorption type washing air purifier |
-
2021
- 2021-05-20 CN CN202110551939.7A patent/CN113266914A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104437007A (en) * | 2014-11-03 | 2015-03-25 | 中国科学院城市环境研究所 | Formaldehyde scavenging air purifier |
| CN105091117A (en) * | 2015-09-17 | 2015-11-25 | 四川绿创环阅环保科技有限公司 | Formaldehyde removal negative-ion air cleaner |
| CN206234932U (en) * | 2016-12-02 | 2017-06-09 | 郑州大学 | A kind of air purifier |
| CN109550381A (en) * | 2017-09-26 | 2019-04-02 | 南京大东机电设备有限公司 | Indoor formaldehyde purifier |
| CN111389154A (en) * | 2020-03-30 | 2020-07-10 | 常州大学 | Falling film absorption type washing air purifier |
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Application publication date: 20210817 |
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