CN110180379B - Indoor formaldehyde degradation device - Google Patents
Indoor formaldehyde degradation device Download PDFInfo
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- CN110180379B CN110180379B CN201910568415.1A CN201910568415A CN110180379B CN 110180379 B CN110180379 B CN 110180379B CN 201910568415 A CN201910568415 A CN 201910568415A CN 110180379 B CN110180379 B CN 110180379B
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 336
- 230000015556 catabolic process Effects 0.000 title claims abstract description 40
- 238000006731 degradation reaction Methods 0.000 title claims abstract description 40
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 60
- 238000009630 liquid culture Methods 0.000 claims abstract description 40
- 239000001963 growth medium Substances 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 244000005700 microbiome Species 0.000 claims abstract description 36
- 238000004090 dissolution Methods 0.000 claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000012528 membrane Substances 0.000 claims abstract description 9
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 8
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 8
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims abstract description 6
- 231100000719 pollutant Toxicity 0.000 claims abstract description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims description 33
- 239000007788 liquid Substances 0.000 claims description 15
- 238000010521 absorption reaction Methods 0.000 claims description 14
- 230000000813 microbial effect Effects 0.000 claims description 14
- 238000010992 reflux Methods 0.000 claims description 11
- 238000009423 ventilation Methods 0.000 claims description 11
- 239000000243 solution Substances 0.000 claims description 10
- 241000894006 Bacteria Species 0.000 claims description 7
- 239000002341 toxic gas Substances 0.000 claims description 7
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- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 2
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- B01D53/34—Chemical or biological purification of waste gases
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Abstract
The invention belongs to the technical field of air purification equipment, and relates to an indoor formaldehyde degradation device, which is used for degrading harmful gas formaldehyde in indoor air based on microorganisms, is provided with an ultrasonic generator, adopts low-intensity ultrasonic waves to break water molecules so as to dissolve the formaldehyde into water, and then is efficiently degraded by formaldehyde-reducing strains, the formaldehyde in the air is dissolved into a liquid culture medium at the maximum efficiency, so that the maximum formaldehyde dissolution is realized, and the formaldehyde is degraded by the formaldehyde-reducing strains which grow on a biological membrane and take the formaldehyde as a unique carbon source and a unique nitrogen source, so that the maximum formaldehyde degradation is realized; its simple structure, convenient to use, with low costs, operability and practicality are strong, can adsorb with the degradation indoor formaldehyde by the high efficiency, improve the dissolution rate and the degradation rate of formaldehyde, also have the purification effect to other pollutants in the air simultaneously, and the indoor formaldehyde is degraded to the highest efficiency, improves the indoor air quality, has very practical realistic meaning and practical value.
Description
The technical field is as follows:
the invention belongs to the technical field of air purification equipment, and relates to an indoor formaldehyde degradation device which degrades harmful gas formaldehyde in indoor air based on microorganisms.
Background art:
in recent years, the indoor air pollution condition in China is remarkable, the threat of indoor air pollution to human health is eye-catching, and formaldehyde becomes a healthy invisible killer. The chinese consumer association published a survey: the sampling detection shows that the newly decorated house contains toxic gas, the formaldehyde content in the newly decorated house exceeds 75 percent, and the concentration of some formaldehyde can even reach 3.0 mg/L. Beijing detects the indoor environmental pollutants after 30 decorated households, and finds that the formaldehyde concentration exceeds 73 percent, Hangzhou detects the indoor environmental pollutants after 53 decorated households, and finds that the formaldehyde concentration exceeds 79 percent and the highest exceeds 30 times. In such new centers, people often experience headache, dizziness, allergic fatigue, and eye, nose, and throat stinging, which is called "sick building syndrome" by the World Health Organization (WHO). Based on this, the degradation and purification of formaldehyde in indoor air are particularly important, and the 'healthy breathing' is urgently needed. The currently common formaldehyde removal methods mainly include physical adsorption methods, chemical methods and microbiological methods: the physical adsorption method is mainly an activated carbon adsorption method, although formaldehyde can be absorbed, the method has the defects that the passive adsorption action range of the activated carbon on the formaldehyde is limited, the efficiency is low, and the aim of degrading the formaldehyde cannot be achieved only by absorbing the formaldehyde if the activated carbon is repeatedly used and operated; the effect of degrading formaldehyde by a chemical method is faster, but the medicament consumption is large, the cost is high, the replacement is troublesome, and other pollutants which are difficult to degrade can be generated; the microbiological method is a new formaldehyde treatment method, has the advantages of low operation cost and no secondary pollution, but has the problems of small formaldehyde dissolution amount, poor degradation efficiency, long degradation time and the like in direct aeration. For example: a household formaldehyde removing device disclosed in Chinese patent 201710677599.6 relates to the technical field of formaldehyde removal. The method comprises the following steps: the device comprises a shell, an air inlet, an air outlet, an ultraviolet lamp, a formaldehyde adsorption net, an active carbon adsorption net, a microorganism purification column, an absorption liquid tank, a fixing plate and a fan; the formaldehyde adsorption net is soaked with titanium dioxide solution; activated immobilized microorganism pellets are arranged in the microorganism purification column; the absorption liquid tank is filled with melamine solution; the titanium dioxide solution on the formaldehyde adsorption net can be irradiated by an ultraviolet lamp to carry out photocatalytic reaction, so that formaldehyde in the air is oxidatively decomposed; degrading formaldehyde through immobilized microorganism pellets in the microorganism purification column; purifying the indoor air through an activated carbon adsorption net; finally, further absorbing the formaldehyde by the melamine solution in the absorption liquid tank; chinese patent 201410607342.X discloses a remove formaldehyde air purifier, belong to the environmental protection technology field, by formaldehyde absorption system, formaldehyde gets rid of system and additional structure and constitutes, formaldehyde absorption system includes the air inlet, air inlet fan, the absorption liquid shower nozzle, spray the absorption chamber, cross the wind gap, the ventilative net of water proof, the gas vent, the collecting hopper, formaldehyde gets rid of the system and includes microbial purification post, the absorption liquid groove, the absorption liquid circulating pump, the flowmeter, absorption liquid evacuation pipe, additional structure includes the shell, base and switch, utilize atomizing absorption liquid to dissolve formaldehyde, utilize immobilized microbial degradation to get rid of formaldehyde. Therefore, the indoor formaldehyde degradation device based on the microbiological method is developed, the formaldehyde is efficiently dissolved and degraded, no harm is caused to the human body, and the device has high social significance and practical value.
The invention content is as follows:
the invention aims to overcome the defects in the prior art, and develops and designs an indoor formaldehyde degradation device to realize maximum degradation and formaldehyde dissolution in indoor air.
In order to achieve the purpose, the indoor formaldehyde degradation device comprises a main reaction unit, a liquid circulation unit and an air extraction unit, wherein the main structure of the main reaction unit comprises a reaction container, a first air vent, an activated carbon carrier, a partition plate, a cover plate, an upper chamber, a lower chamber, a second air vent, a baffle plate, an ultrasonic generator, a microbial carrier and a biological membrane; the main structure of the liquid circulation unit comprises a liquid culture medium, an upper communicating pipeline, a lower communicating pipeline, a screen, a water pump and a check valve; the main structure of the air extraction unit comprises an air pump and an air duct; the side wall of the top end of a reaction container with an internal hollow structure is provided with first vents which are arranged in pairs, an activated carbon carrier is arranged below the first vents in the reaction container, the lower part of the activated carbon carrier in the reaction container is divided into an upper chamber and a lower chamber by a partition plate and a cover plate, the cover plate is provided with a second vent, a baffle plate is arranged below the second vent, the bottom of the reaction container is provided with an air pump, the air pump is connected with one end of an air pipeline, the other end of the air pipeline is communicated with the upper chamber, the bottom of the upper chamber is provided with an ultrasonic generator, the lower part of the lower chamber is provided with a microorganism carrier, the upper surface of the microorganism carrier is provided with a biological film, liquid culture mediums are filled in the upper chamber and the lower chamber, an upper communicating pipeline is arranged between the upper part of the upper chamber and the upper part of the lower chamber, and a lower communicating pipeline is arranged between the lower part of the upper chamber and the lower chamber, a screen is arranged between the upper communicating pipeline and the upper chamber, a water pump is arranged at one end of the lower communicating pipeline close to the lower chamber, a check valve is arranged on the lower communicating pipeline, and the check valve is arranged above the water pump; the reaction vessel is fixedly connected with the cover plate.
The reaction vessel is of a cuboid structure, the side wall of the reaction vessel is provided with a switch door which is convenient to enter the reaction vessel for overhauling and maintaining, so that the service life and the attractiveness are increased, the reaction vessel is convenient to move, and the reaction vessel is simple in structure and easy to operate; the first ventilation opening and the second ventilation opening provide outlets for the degraded and purified air; the activated carbon carrier absorbs undegraded formaldehyde and other toxic gases in the air, and can improve the absorption capacity of the formaldehyde and other toxic gases in the air; the upper chamber or the lower chamber is provided with a valve which is convenient for filling, updating and discharging the liquid culture medium; the baffle is used for preventing water waves which are smashed by the ultrasonic generator and vibrate from passing through the second ventilation opening; the air pump and the air pipe are matched to aerate the upper chamber; the ultrasonic generator emits low-intensity ultrasonic waves, and the intermittent mode is adopted for working, so that water molecules can be broken by vibration, and the maximum formaldehyde dissolution is realized; the microorganism carrier is arranged at 5/2 at the lower end of the lower chamber to provide space for microorganism biofilm culturing, and is composed of one or more of fruit shell activated carbon, volcanic rock, medical stone, columnar activated carbon, quartz spheres, bacterial spheres, nitley microorganism fiber rings, ceramsite filter materials, cultured biological spheres and coral bones; the biological membrane is composed of a jiajia-reducing strain which takes formaldehyde as a unique carbon source and a unique nitrogen source; the liquid culture medium is a mixed solution consisting of nutrient solution and trace element solution required by culturing microorganisms, and can provide the best nutrient environment and growth conditions for the growth of formaldehyde-reducing bacteria; the screen mesh is used for preventing large-particle pollutants in air and liquid culture medium from entering the upper chamber and the lower chamber; the water pump provides power for the circulation of the liquid culture medium, and the liquid culture medium flowing through the microbial carrier in the lower chamber is conveyed to the upper chamber to complete the circulation of the liquid culture medium; a check valve is provided at 10/1 at the lower end of the lower communicating conduit for preventing backflow of the liquid culture medium in the lower communicating conduit.
When the indoor formaldehyde degradation device is used, an air pump pumps indoor air containing formaldehyde into an upper chamber through an air duct, an ultrasonic generator works intermittently to shatter water molecules in the upper chamber, the formaldehyde is in large-area contact and fusion with the water molecules, so that a liquid culture medium in the upper chamber contains sufficient formaldehyde, meanwhile, the liquid culture medium in the upper chamber flows into a lower chamber through an upper communicating duct, so that the formaldehyde enters the lower chamber, the formaldehyde stays on a microbial carrier and a biomembrane and is degraded, the degraded gas is conveyed to the upper chamber through a water pump and a communicating duct, and sequentially enters the chamber through a second vent, an activated carbon carrier and a first vent, wherein the undegraded gas enters the chamber after being adsorbed and degraded by the activated carbon carrier, so that the degradation rate of the formaldehyde or other harmful gases in the air is improved, and the liquid culture medium at the lower end of the lower chamber is conveyed to the upper chamber through the lower communicating duct by the power provided by the water pump, realizes the circulation and the reutilization of the liquid culture medium.
The frequency of the ultrasonic generator is 35KHz, and when the reflux ratio of the upper chamber is 100%, the formaldehyde-reducing bacteria inactivation rate is lowest and the survival rate is highest.
Compared with the prior art, the invention is provided with the ultrasonic generator, water molecules are shattered by adopting low-intensity ultrasonic waves, so that formaldehyde is dissolved in water and then efficiently degraded by formaldehyde-reducing strains, the formaldehyde in the air is dissolved in a liquid culture medium at the maximum efficiency, the maximum formaldehyde dissolution is realized, the formaldehyde is degraded by the formaldehyde-reducing strains which grow on the biological membrane and take the formaldehyde as a unique carbon source and a unique nitrogen source, and the maximum formaldehyde degradation is realized; its simple structure, convenient to use, with low costs, operability and practicality are strong, can adsorb with the degradation indoor formaldehyde by the high efficiency, improve the dissolution rate and the degradation rate of formaldehyde, also have the purification effect to other pollutants in the air simultaneously, and the indoor formaldehyde is degraded to the highest efficiency, improves the indoor air quality, has very practical realistic meaning and practical value.
Description of the drawings:
fig. 1 is a schematic diagram of the principle of the main structure of the present invention.
Fig. 2 is a schematic sectional view of the main structure of the present invention.
FIG. 3 is a linear graph of formaldehyde dissolution rate of ultrasonic generator aeration and direct aeration according to the present invention.
FIG. 4 is a graph showing the linear relationship between the frequency of the ultrasonic generator and the inactivation rate of microorganisms according to the present invention.
The specific implementation mode is as follows:
the invention is further illustrated by the following examples in conjunction with the accompanying drawings.
Example 1:
the main structure of the indoor formaldehyde degradation device related to the embodiment comprises a reaction container 1, a first vent 2, an activated carbon carrier 3, a partition plate 4, a cover plate 5, an upper chamber 6, a lower chamber 7, a second vent 8, a baffle plate 9, an air pump 10, a vent pipeline 11, an ultrasonic generator 12, a microorganism carrier 13, a biological membrane 14, a liquid culture medium 15, an upper communicating pipeline 16, a lower communicating pipeline 17, a screen 18, a water pump 19 and a check valve 20; the side wall of the top end of a reaction container 1 with an internal hollow structure is provided with first vents 2 which are arranged in pairs, an active carbon carrier 3 is arranged below the first vents 2 in the reaction container 1, the lower part of the active carbon carrier 3 in the reaction container 1 is divided into an upper chamber 6 and a lower chamber 7 by a partition plate 4 and a cover plate 5, the cover plate 5 is fixedly connected with the reaction container 1, the cover plate 5 is provided with a second vent 8, a baffle plate 9 is arranged below the second vent 8, the bottom of the reaction container 1 is provided with an air pump 10, the air pump 10 is connected with one end of an air pipe 11, the other end of the air pipe 11 is communicated with the upper chamber 6, the bottom of the upper chamber 6 is provided with an ultrasonic generator 12, the lower part of the lower chamber 7 is provided with a microorganism carrier 13, the upper surface of the microorganism carrier 13 is provided with a biological membrane 14, liquid culture mediums 15 are filled in the upper chamber 6 and the lower chamber 7, an upper communication pipe 16 is arranged between the upper part of the upper chamber 6 and the lower chamber 7, a lower communicating pipeline 17 is arranged between the lower part of the upper chamber 6 and the lower part of the lower chamber 7, a screen 18 is arranged between the upper communicating pipeline 16 and the upper chamber 6, a water pump 19 is arranged at one end of the lower communicating pipeline 17 close to the lower chamber 7, a check valve 20 is arranged on the lower communicating pipeline 17, and the check valve 20 is arranged above the water pump 19.
The reaction vessel 1 related to the embodiment is of a cuboid structure, the side wall of the reaction vessel is provided with a switch door which is convenient to enter the reaction vessel 1 for overhauling and maintaining, so that the service life and the attractiveness are prolonged, the movement is convenient, the structure is simple, and the operation is easy; the first ventilation opening 2 and the second ventilation opening 8 provide outlets for the degraded and purified air; the activated carbon carrier 3 absorbs undegraded formaldehyde and other toxic gases in the air, and can improve the absorption capacity of the formaldehyde and other toxic gases in the air; the upper chamber 6 or the lower chamber 7 is provided with a valve which is convenient for filling, updating and discharging the liquid culture medium 15; the baffle 9 is used for preventing water waves which are smashed by the ultrasonic generator 12 and vibrate from passing through the second ventilation opening 8; the air pump 10 and the air duct 11 are matched to aerate the upper chamber 6; the ultrasonic generator 12 emits low-intensity ultrasonic waves, and works in an intermittent mode, so that water molecules can be broken by vibration, and the maximum formaldehyde dissolution is realized; the microorganism carrier 13 is arranged at 5/2 at the lower end of the lower chamber 7, provides space for microorganism biofilm culturing, and is composed of one or more of fruit shell activated carbon, volcanic rock, medical stone, columnar activated carbon, quartz sphere, bacterial sphere, nitley microorganism fiber ring, ceramsite filter material, cultured biological sphere and coral bone; the biological membrane 14 is composed of a jiajia-reducing strain taking formaldehyde as a unique carbon source and a unique nitrogen source; the liquid culture medium 15 is a mixed solution consisting of nutrient solution and trace element solution required by culturing microorganisms, and can provide the best nutrient environment and growth conditions for the growth of formaldehyde-reducing bacteria; the screen 18 is used for blocking air and large-particle pollutants in the liquid culture medium 15 from entering the upper chamber 6 and the lower chamber 7; the water pump 19 provides power for the circulation of the liquid culture medium 15, and conveys the liquid culture medium 15 flowing through the microorganism carriers 13 in the lower chamber 7 to the upper chamber 6 so as to complete the circulation of the liquid culture medium 15; a check valve 20 is provided at 10/1 at the lower end of the lower communicating pipe 17 for preventing the liquid medium 15 in the lower communicating pipe 17 from flowing backward.
Example 2:
when the indoor formaldehyde degradation device related to the embodiment is used, the air pump 10 pumps indoor air containing formaldehyde into the upper chamber 6 through the ventilation pipeline 11, the ultrasonic generator 12 works intermittently to shatter water molecules in the upper chamber 6, the formaldehyde is in large-area contact and fusion with the water molecules, so that the liquid culture medium 15 in the upper chamber 6 contains sufficient formaldehyde, meanwhile, the liquid culture medium 15 in the upper chamber 6 flows into the lower chamber 7 through the upper communication pipeline 16, the formaldehyde enters the lower chamber 7, the formaldehyde stays on the microbial carrier 13 and the biomembrane 14 and is degraded, the degraded gas is conveyed to the upper chamber 6 through the water pump 19 and the communication pipeline 17 and sequentially enters the room through the second vent 8, the activated carbon carrier 3 and the first vent 2, wherein the undegraded gas enters the room after being adsorbed and degraded by the activated carbon carrier 3, so that the degradation rate of the formaldehyde or other harmful gases in the air is improved, the liquid culture medium 15 at the lower end of the lower chamber 7 is conveyed to the upper chamber 6 through the lower communicating pipeline 17 by the power provided by the water pump 19, so that the circulation and the reutilization of the liquid culture medium 15 are realized.
Example 3:
the indoor formaldehyde degradation device related to the embodiment adopts the ultrasonic generator 12 for aeration and the formaldehyde degradation device in the prior art adopts direct aeration to respectively dissolve formaldehyde with the concentration of 3.0mg/L, the formaldehyde dissolution rate measured by utilizing the high performance liquid chromatography is shown in figure 3, and the formaldehyde dissolution rate of the ultrasonic generator 12 for aeration is higher than that of the direct aeration; when the frequency of the ultrasonic generator 12 is 40KHz, the formaldehyde dissolution rate is the maximum; the ultrasonic generator 12 has an inactivation effect on formaldehyde-reducing bacteria, and the calculation formula of the sample microorganism inactivation rate (i) under different ultrasonic conditions is as follows: i is (1-Nt/N0) multiplied by 100 percent, wherein Nt is the number of microbial colonies in the water sample after ultrasonic treatment, cfu/mL; n0 is the microbial colony number, cfu/mL, in the water sample before ultrasonic treatment; with the increase of the ultrasonic time, the microbial sterilization rate is in an increasing trend and then in a decreasing trend, when the ultrasonic time is 20min, the microbial sterilization rate reaches the maximum, and after the ultrasonic generator 12 works intermittently for 20min (the intermittent: working is 8:2), the microbial inactivation rate under different frequencies of the ultrasonic generator 12 is the highest, as shown in fig. 4, when the power of the ultrasonic generator 12 is 38W and the frequency is 30 KHz.
Example 4:
the results of the different reflux ratios of the upper chamber 6 of the indoor formaldehyde degradation device related to the embodiment on the retention time, the formaldehyde-reducing bacteria inactivation rate and the formaldehyde degradation rate of the liquid medium 15 are as follows:
wherein: the formaldehyde degradation rate is the initial formaldehyde dissolution rate-the final formaldehyde dissolution rate, and when the reflux ratio is 100%, the formaldehyde degradation rate is the highest, and the microorganism inactivation rate is the lowest.
Example 5:
the frequency of the ultrasonic generator 12 of the indoor formaldehyde degradation device and the reflux ratio of the upper chamber 6 according to the embodiment have the greatest influence on the formaldehyde dissolution rate and the microbial survival rate. Based on the effect that the survival rate of the microorganisms is the highest when the power of the ultrasonic generator 12 is 38W in example 3, and the formaldehyde degradation rate is the highest and the microorganism inactivation rate is the lowest when the reflux ratio is 100% in example 4. The set optimal frequency and reflux ratio are as follows:
| frequency/KHz | 30KHz | 35KHz | 40KHz | 45KHz |
| Reflux ratio/% | 95％ | 100％ | 105％ | 110％ |
Further optimization of frequency and reflux ratio by controlled variational method, the effect of frequency and reflux ratio on the microorganism inactivation rate and formaldehyde degradation rate is as follows:
shows that: the frequency of the ultrasonic generator 12 is 35KHz, when the reflux ratio of the upper chamber 6 is 100%, the formaldehyde-reducing bacteria inactivation rate is lowest, the survival rate is highest, the microorganism inactivation rate in the circulating liquid is 42.6%, the microorganism inactivation rate on the carrier is 9.2%, the formaldehyde dissolution rate and the formaldehyde degradation rate are higher, the formaldehyde dissolution rate is 81.0%, and the formaldehyde degradation rate is 77.5%, so that the requirement for degrading the formaldehyde in the chamber can be completely met.
Claims (4)
1. An indoor formaldehyde degradation device is characterized by comprising a main reaction unit, a liquid circulation unit and an air extraction unit, wherein the main structure of the main reaction unit comprises a reaction container, a first vent, an activated carbon carrier, a partition plate, a cover plate, an upper chamber, a lower chamber, a second vent, a baffle, an ultrasonic generator, a microorganism carrier and a biological membrane; the main structure of the liquid circulation unit comprises a liquid culture medium, an upper communicating pipeline, a lower communicating pipeline, a screen, a water pump and a check valve; the main structure of the air extraction unit comprises an air pump and an air duct; the side wall of the top end of a reaction container with an internal hollow structure is provided with first vents which are arranged in pairs, an activated carbon carrier is arranged below the first vents in the reaction container, the lower part of the activated carbon carrier in the reaction container is divided into an upper chamber and a lower chamber by a partition plate and a cover plate, the cover plate is provided with a second vent, a baffle plate is arranged below the second vent, the bottom of the reaction container is provided with an air pump, the air pump is connected with one end of an air pipeline, the other end of the air pipeline is communicated with the upper chamber, the bottom of the upper chamber is provided with an ultrasonic generator, the lower part of the lower chamber is provided with a microorganism carrier, the upper surface of the microorganism carrier is provided with a biological film, liquid culture mediums are filled in the upper chamber and the lower chamber, an upper communicating pipeline is arranged between the upper part of the upper chamber and the upper part of the lower chamber, and a lower communicating pipeline is arranged between the lower part of the upper chamber and the lower chamber, a screen is arranged between the upper communicating pipeline and the upper chamber, a water pump is arranged at one end of the lower communicating pipeline close to the lower chamber, a check valve is arranged on the lower communicating pipeline, and the check valve is arranged above the water pump; the reaction vessel is fixedly connected with the cover plate.
2. The indoor formaldehyde degradation device according to claim 1, wherein the reaction vessel is of a cuboid structure, and a switch door which is convenient to access the interior of the reaction vessel for overhaul and maintenance is arranged on the side wall of the reaction vessel so as to prolong the service life and improve the aesthetic degree, and the indoor formaldehyde degradation device is convenient to move, simple in structure and easy to operate; the first ventilation opening and the second ventilation opening provide outlets for the degraded and purified air; the activated carbon carrier absorbs undegraded formaldehyde and other toxic gases in the air, and can improve the absorption capacity of the formaldehyde and other toxic gases in the air; the upper chamber or the lower chamber is provided with a valve which is convenient for filling, updating and discharging the liquid culture medium; the baffle is used for preventing water waves which are smashed by the ultrasonic generator and vibrate from passing through the second ventilation opening; the air pump and the air pipe are matched to aerate the upper chamber; the ultrasonic generator emits low-intensity ultrasonic waves, and the intermittent mode is adopted for working, so that water molecules can be broken by vibration, and the maximum formaldehyde dissolution is realized; the microorganism carrier is arranged at 5/2 at the lower end of the lower chamber to provide space for microorganism biofilm culturing, and is composed of one or more of fruit shell activated carbon, volcanic rock, medical stone, columnar activated carbon, quartz spheres, bacterial spheres, nitley microorganism fiber rings, ceramsite filter materials, cultured biological spheres and coral bones; the biological membrane is composed of a jiajia-reducing strain which takes formaldehyde as a unique carbon source and a unique nitrogen source; the liquid culture medium is a mixed solution consisting of nutrient solution and trace element solution required by culturing microorganisms, and can provide the best nutrient environment and growth conditions for the growth of formaldehyde-reducing bacteria; the screen mesh is used for preventing large-particle pollutants in air and liquid culture medium from entering the upper chamber and the lower chamber; the water pump provides power for the circulation of the liquid culture medium, and the liquid culture medium flowing through the microbial carrier in the lower chamber is conveyed to the upper chamber to complete the circulation of the liquid culture medium; a check valve is provided at 10/1 at the lower end of the lower communicating conduit for preventing backflow of the liquid culture medium in the lower communicating conduit.
3. An indoor formaldehyde degradation device according to claim 1 or 2, wherein when in use, the air pump pumps indoor air containing formaldehyde into the upper chamber through the ventilation pipeline, the ultrasonic generator works intermittently to shatter water molecules in the upper chamber, the formaldehyde is in large-area contact with and fused with the water molecules, so that the liquid culture medium in the upper chamber contains sufficient formaldehyde, meanwhile, the liquid culture medium in the upper chamber flows into the lower chamber through the upper communication pipeline, so that the formaldehyde enters the lower chamber, the formaldehyde stays on the microbial carrier and the biomembrane and is degraded, the degraded gas is conveyed to the upper chamber through the water pump and the communication pipeline and sequentially enters the room through the second vent, the activated carbon carrier and the first vent, wherein the undegraded gas enters the room after being adsorbed and degraded by the activated carbon carrier, so that the degradation rate of the formaldehyde or other harmful gases in the air is improved, the liquid culture medium at the lower end of the lower cavity is conveyed to the upper cavity by the power provided by the water pump through the lower communicating pipeline, so that the circulation and the reutilization of the liquid culture medium are realized.
4. The indoor formaldehyde degradation device according to claim 3, wherein the frequency of the ultrasonic generator is 35KHz, and the reflux ratio of the upper chamber is 100%.
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| CN201910568415.1A CN110180379B (en) | 2019-06-27 | 2019-06-27 | Indoor formaldehyde degradation device |
| PCT/CN2020/079328 WO2020258924A1 (en) | 2019-06-27 | 2020-03-13 | Device for formaldehyde degradation and method for formaldehyde degradation |
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| CN201910568415.1A CN110180379B (en) | 2019-06-27 | 2019-06-27 | Indoor formaldehyde degradation device |
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| CN110180379B (en) * | 2019-06-27 | 2021-12-28 | 青岛理工大学 | Indoor formaldehyde degradation device |
| CN114196579A (en) * | 2021-12-13 | 2022-03-18 | 张峰 | Formaldehyde microbial purification ware that building ventilation engineering used |
| CN114570194B (en) * | 2021-12-29 | 2024-03-01 | 朗昆（北京）新环保科技有限公司 | Growth promoting flora, filter bed, device and method for treating waste gas generated in viscose fiber production |
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| WO2020258924A1 (en) | 2020-12-30 |
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