CN113019048B - Air purification device based on biomass protein system graphene nanocomposite - Google Patents
Air purification device based on biomass protein system graphene nanocomposite Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
- B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
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- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
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Abstract
The invention relates to a device in the field of air purification, in particular to an air purification device based on a biomass protein graphene nanocomposite. The novel air purification device comprises a shell, wherein a purification cavity, an air inlet cavity and a multistage filter cavity are sequentially arranged in the shell from bottom to top, the cavities are separated through a porous plate, a base is arranged at the bottom of the shell, a purified air outlet structure is arranged at the top of the shell and communicated with the multistage filter cavity, a graphene aerogel net column is detachably arranged in the purification cavity and is a circulating water cavity, a water inlet is formed in the lower part of the circulating water cavity, and a water outlet is formed in the upper part of the circulating water cavity.
Description
Technical Field
The invention relates to a device in the field of air purification, in particular to an air purification device based on a biomass protein graphene nanocomposite.
Background
The aerogel is composed of a solid part of gel and air, is solid, is much heavier than air in weight due to the fact that the aerogel is mainly air, is a three-dimensional structure of the hierarchical-pore graphene aerogel, takes biomass protein as a template, forms graphene and other materials into a graphene nanocomposite with a certain spatial structure through introducing heteroatoms and self-assembling, and builds an adsorption material with high performance by exerting the synergistic effect between the graphene and different materials.
Disclosure of Invention
The invention discloses an air purification device based on a biomass protein system graphene nanocomposite, which aims to solve the problems in the prior art and provides a scientific basis for the application of three-dimensional graphene aerosol prepared by taking biomass protein as a template in the field of air purification.
Further, the bottom in purification chamber is equipped with the drive frame, be equipped with the rotation driving motor in the drive frame, the rotation driving motor shaft is equipped with through the transmission shaft hub and rotates the seat, the top of rotating the seat is equipped with the cleaning brush, the side at graphite alkene aerogel net post is enclosed to the cleaning brush.
Further, be equipped with the bleed pipe in the circulating water cavity, the top of bleed pipe runs through and communicates the chamber of admitting air, the middle part of bleed pipe is equipped with the aspirator pump, the aspirator pump internal fixation has the pump to inhale the motor, the pipe portion of the bottom of bleed pipe is porous.
Further, a negative pressure fan is arranged inside the air inlet cavity, the position, corresponding to the air inlet cavity, of the shell is latticed, and a negative pressure driving motor is arranged in the negative pressure fan.
Further, graphite alkene aerogel net post top corresponds first perforated plate, is equipped with the screw cap in the bottom of first perforated plate, the upper portion correspondence of graphite alkene aerogel net post is equipped with the internal thread with screw cap matched with.
Further, including filter pulp and HEPA filter paper that from the bottom up was equipped with in proper order in the multistage filter chamber.
Further, the bottom of base is equipped with the removal pulley.
Further, purify the gas outlet structure and include the air regulating valve that the bottom was equipped with and go out a section of thick bamboo at top, air regulating valve passes through the bearing with a section of thick bamboo of going out and is connected.
Further, the top of the shell is also provided with a controller, the controller comprises a first control circuit and a second control circuit which are integrated on the pcb, the first control circuit is electrically connected with the second control circuit, the first control circuit is also electrically connected with the driving circuit, the selection circuit and the analog-to-digital conversion circuit respectively, the analog-to-digital conversion circuit is electrically connected with the selection circuit through the amplifier circuit, the selection circuit is electrically connected with the sensor, the sensor detects the flow rate of the fluid, second control circuit and output circuit electric connection, first control circuit pass through communication circuit and connect the host computer, drive circuit direct and rotary driving motor, the negative pressure driving motor electric connection in the suction motor of aspiration pump, the negative pressure fan, drive circuit carry out power control according to the time sequence to rotary driving motor, the suction motor of aspiration pump, the negative pressure driving motor in the negative pressure fan, first control circuit according to sensor signal dynamic adjustment drive circuit's output signal.
Furthermore, the cleaning brush comprises a shell body forming an inner cavity of the inverted circular truncated cone, a through hole is formed in the shell body, a washing layer is fixed on the inner wall of the shell body and comprises brush hair and breathable cloth for fixing the brush hair, and the impurities outside the graphene aerogel net column are supported by the through holes of the breathable cloth and the through hole to be discharged outwards.
The preparation method of the graphene aerogel comprises the following steps:
preparing three-dimensional graphene aerogel by taking biomass protein as a template, placing 250mg of separated biomass protein in a glass tube, adding 48mg of ascorbic acid aqueous solution into the glass tube, beating the mixture in a magnetic stirrer at a rotating speed of 1900rpm until the protein is white colloid, adding 24mg of GO aqueous solution and 125mg of urea into the mixture, and continuously stirring the mixture for 3min to form brownish yellow gel. And (3) putting the gel into an oven, and reducing for 30min at 85 ℃ to form partially reduced graphene hydrogel. And then completely freezing the hydrogel in a refrigerator at (-18 ℃), thawing at room temperature, and continuously reducing the partially reduced graphene hydrogel for 7 hours at 85 ℃ to obtain the graphene hydrogel. And (2) carrying out freeze drying on the graphene hydrogel to remove water in the hydrogel, and carbonizing the graphene hydrogel at 800 ℃ by using a high-temperature tube furnace to prepare the three-dimensional macroporous graphene aerogel (CGA). Adding a proper amount of KOH into the graphene hydrogel, carrying out hydrothermal treatment at 180 ℃ for 2h, freeze-drying, and carrying out high-temperature carbonization and activation to prepare the Hierarchical Porous Graphene Aerogel (HPGA).
Has the beneficial effects that:
the air purification device is characterized in that a graphene aerogel net column is detachably arranged in a purification cavity, three-dimensional macroporous graphene aerogel is placed in the graphene aerogel net column, a circulating water cavity is arranged outside the graphene aerogel net column and can adsorb water impurities, air in an external environment is sucked into the circulating water cavity in the purification cavity through a negative pressure fan and an air suction pump, the three-dimensional macroporous graphene aerogel placed in the graphene aerogel net column is used for adsorbing the impurities in the air, the air is washed in a coordinated circulating manner and is washed and purified, the purified air is upwards filtered through filter cotton and HEPA filter paper from a first porous plate, the air is further filtered and purified, and then the purified air is discharged from an air outlet cylinder through an air regulating valve.
In addition, be equipped with the clearance brush in the side of graphite alkene aerogel net post, rotate the seat through the drive and rotate and can clear up the outer impurity of graphite alkene aerogel net post, then outside with impurity eduction gear through the circulating water, prolong the live time of graphite alkene aerogel to graphite alkene aerogel net post sets up to dismantling, is convenient for change.
In addition, purify the export of gas and include the air regulating valve that the bottom was equipped with and the play gas cylinder at top, air regulating valve passes through the bearing with a play gas cylinder and is connected, can adjust air flow rate through air regulating valve, goes out the gas cylinder and is connected with the air regulating valve bearing and can realize going out the rotation of gas cylinder, with higher speed the air flow and purify the cover of gas.
The through hole of the ventilative cloth 13c2 of clearance brush and the aperture configuration of through-hole 13b in this application can realize the high-efficient clearance to the outer impurity of graphite alkene aerogel net post in the water polymer. The single chip of the first control circuit on the controller is configured to dynamically adjust the signal of the driving circuit according to the detected fluid flow rate of the sensor so as to realize the cooperative work of the power of the rotary driving motor, the pumping motor of the suction pump and the negative pressure driving motor in the negative pressure fan.
Drawings
Fig. 1 is a schematic diagram of the overall structure of an air purification device based on a biomass protein graphene nanocomposite material according to the present invention;
fig. 2 is a schematic structural diagram of a cleaning brush of an air purification device based on a biomass protein graphene nanocomposite material according to the present invention;
fig. 3 is a block diagram of a circuit of a controller of an air purification device based on a biomass protein graphene nanocomposite material according to the present invention.
In the figure, 1, a shell, 2, a purification cavity, 3, an air inlet cavity, 4, a multi-stage filter cavity, 5, a base, 6, a purified air outlet structure, 7, a graphene aerogel net column, 8, a circulating water cavity, 9, a water inlet, 10, a water outlet, 11, a driving machine base, 12, a rotating base, 13, a cleaning brush, 14, a negative pressure fan, 15, a first porous plate, 16, filter cotton, 17, HEPA filter paper, 18, a movable pulley, 19, an air regulating valve, 20, an air outlet cylinder, 21, a controller and 22, an air guide pipe are arranged.
Detailed Description
The utility model provides an air purification device based on biomass protein system graphite alkene nanocomposite, as shown in figure 1, including casing 1, from the bottom up is equipped with purification chamber 2 in proper order in casing 1, admit air chamber 3, multistage filter chamber 4, separates through the perforated plate between each cavity, the bottom of purifying chamber 2 is equipped with drive frame 11, purify graphite alkene aerogel net post 7 that 2 interior detachable of chamber were equipped with, placed three-dimensional macropore graphite alkene aerogel in the graphite alkene aerogel net post 7, specific, graphite alkene aerogel net post 7 top corresponds first perforated plate 15, is equipped with the thread lid in the bottom of first perforated plate 15, the upper portion correspondence of graphite alkene aerogel net post is equipped with thread lid matched with internal thread, be convenient for change graphite alkene net post, graphite alkene aerogel net post 7 is outer for circulating water cavity 8, circulating water cavity 8's lower part is equipped with water inlet 9, and upper portion is equipped with delivery port 10, admits through admitting air aerogel, upper portion water forms circulating water cavity, the inside of chamber 3 is equipped with negative pressure air suction fan 14, casing 1 corresponds the latticed cavity 3 position for negative pressure suction chamber, 14 sets up air fan 14, the air suction pipe drives the internal suction pipe internal water pump and is equipped with air pump 22, and is equipped with air suction pipe 22, and is drawn through the internal suction pipe 22, and is equipped with air suction pipe internal circulation pump 22, and is drawn through the internal impurity in the circulation pump.
Be equipped with the rotation driving motor in the drive frame 11, the rotation driving motor axle is equipped with through the transmission shaft connection and rotates seat 12, the top of rotating seat 12 is equipped with cleaning brush 13, cleaning brush 13 encloses the side of establishing at graphite alkene aerogel net post 7, is equipped with cleaning brush 13 in graphite alkene aerogel net post 7's side, rotates seat 12 rotations through the drive and can clear up the outer impurity of graphite alkene aerogel net post 7, then outside with impurity eduction gear through the circulating water, prolongs the live time of graphite alkene aerogel to graphite alkene aerogel net post 7 sets up to dismantling, is convenient for change.
In a more specific implementation, as shown in fig. 2, the cleaning brush 13 includes a housing 13a forming an inverted circular truncated cone cavity, a through hole 13b is formed in the housing 13a, a washing layer 13c is fixed on an inner wall of the housing 13a, and the washing layer 13c includes bristles 13c1 and a breathable cloth 13c2 for fixing the bristles 13c 1. The through holes and the through holes 13b of the breathable cloth 13c2 support the outward discharge of impurities outside the graphene aerogel net column 7.
In specific implementation, in a cleaning cycle of one or more cleaning brushes 13, the maximum diameter and diameter distribution mode of the polymer in the water body of the impurities outside the graphene aerogel mesh column 7 are obtained through statistics, and the through holes of the air permeable cloth 13c2 and the pore diameters of the through holes 13b are configured as follows:
the maximum diameter of the polymer in the water body of the impurities outside the graphene aerogel net column 7 is defined as a first parameter,
the polymer diameter distribution mode of the impurities outside the graphene aerogel net column 7 in the water body is defined as a second parameter,
90% of the through hole diameter of the air-permeable cloth 13c2 is configured as a second parameter, 10% of the through hole diameter of the air-permeable cloth 13c2 is configured as a first parameter, 70% of the hole diameter of the through hole 13b is configured as a second parameter, and 30% of the hole diameter of the through hole 13b is configured as a first parameter, so that the efficient cleaning of the polymer in the water body from the impurities outside the graphene aerogel mesh column 7 can be realized through the through holes of the air-permeable cloth 13c2 and the hole diameter configuration of the through hole 13 b.
The bottom of casing 1 is equipped with base 5, the bottom of base 5 is equipped with removes pulley 18, the removal of being convenient for purifier.
The top of casing 1 is equipped with and purifies gas outlet structure 6, purify gas outlet structure 6 and 4 intercommunications in multistage filter chamber, purify gas outlet structure 6 and include the air regulating valve 19 that the bottom was equipped with and the play bobbin 20 at top, air regulating valve 19 passes through the bearing with play bobbin 20 and is connected, can be through air regulating valve 19 regulation air flow rate, go out bobbin 20 and air regulating valve 19 bearing connection and can realize the rotation of play bobbin 20, the cover of air flow and purification gas with higher speed.
Including filtration cotton 16 and HEPA filter paper 17 that from the bottom up was equipped with in proper order in the multistage filter chamber 4, the air after 2 processing purifications of purifying chamber filters from first perforated plate 15 upwards through filtration cotton 16 and HEPA filter paper 17, further realizes the filtration purification of air, then discharges the air that purifies from the air outlet cylinder 20 through air regulating valve 19.
The top of the shell 1 is also provided with a controller 21, the controller 21 is electrically connected with a rotary driving motor in the driving base 11, a pumping motor of the suction pump and a negative pressure driving motor in the negative pressure fan 14, and the cleaning brush 13, the negative pressure fan 14 and the suction pump can be controlled and started by the controller 21. In implementation, sensors for detecting the flow rate of fluid are disposed in both the bleed air pipe 22 and the purge cavity 2, as shown in fig. 3, the controller 21 includes a first control circuit and a second control circuit integrated on the pcb, the first control circuit is electrically connected to the second control circuit, the first control circuit is further electrically connected to the driving circuit, the selection circuit and the analog-to-digital conversion circuit, the analog-to-digital conversion circuit is electrically connected to the selection circuit through an amplifier circuit, the selection circuit is electrically connected to the sensors, the sensors detect the flow rate of fluid, the second control circuit is electrically connected to the output circuit, the first control circuit is connected to an upper computer through a communication circuit, the driving circuit is directly electrically connected to the rotation driving motor, the suction motor of the suction pump and the negative pressure driving motor in the suction fan 14, the driving circuit performs power control on the rotation driving motor, the suction motor of the suction pump and the negative pressure driving motor in the negative pressure fan 14 according to a time sequence, and the first control circuit dynamically adjusts an output signal of the driving circuit according to a sensor signal;
the first control circuit and the second control circuit in implementation adopt single-chip microcomputers, the first control circuit and the second control circuit are connected through a serial transmission bus, the first control circuit is connected with an upper computer through a communication circuit, the communication circuit adopts a serial port driving circuit, the amplifier circuit can adopt a differential amplification circuit, in specific implementation, the single-chip microcomputers are configured to dynamically adjust signals of the driving circuit according to the detected fluid flow rate of a sensor so as to realize the cooperative work of the power of a rotary driving motor, a pumping motor of an air suction pump and a negative pressure driving motor in a negative pressure fan 14, and specifically:
the comprehensive efficiency of the pump suction motor and the negative pressure driving motor of the suction pump is slightly lower than the efficiency of the rotary driving motor, the efficiency of the rotary driving motor is slightly lower than the working efficiency of water pressure in the purification chamber 2, so that the air required to be purified by the pump suction motor and the negative pressure driving motor of the suction pump can be effectively purified, and the cleaning work under the working driving of the rotary driving motor can be ensured to clean the result of the air purification in time (cleaning the impurities outside the graphene aerogel net post 7), and the impurities outside the graphene aerogel net post 7 can be ensured to be discharged through the water flow of the water pressure work in time, so that the rotary driving motor, the pump suction motor of the suction pump and the power of the negative pressure driving motor in the negative pressure fan 14 can work in a cooperative mode.
In order to further improve the utilization rate of water in the purification cavity 2, a circulating pipeline with a filtering device can be directly added outside the water inlet 9 and the water outlet 10.
In an embodiment, the preparation method of the graphene aerogel comprises the following steps:
preparing three-dimensional graphene aerogel by taking biomass protein as a template, placing 250mg of separated biomass protein in a glass tube, adding 48mg of ascorbic acid aqueous solution into the glass tube, stirring the mixture in a magnetic stirrer at a rotating speed of 1900rpm until the protein presents white colloid, adding 24mg of GO aqueous solution and 125mg of urea into the mixture, and continuously stirring the mixture for 3min to form brown yellow gel. And (3) putting the gel into an oven, and reducing for 30min at 85 ℃ to form partially reduced graphene hydrogel. And completely freezing the hydrogel in a refrigerator at (-18 ℃), thawing at room temperature, and continuously reducing the partially reduced graphene hydrogel for 7 hours at 85 ℃ to obtain the graphene hydrogel. And (3) carrying out freeze drying on the graphene hydrogel to remove water in the hydrogel, and then carbonizing the graphene hydrogel at 800 ℃ through a high-temperature tube furnace to prepare the three-dimensional macroporous graphene aerogel (CGA). Adding a proper amount of KOH into the graphene hydrogel, carrying out hydrothermal treatment at 180 ℃ for 2h, carrying out freeze drying, and carrying out high-temperature carbonization and activation, thereby preparing the Hierarchical Porous Graphene Aerogel (HPGA).
It should be noted that the above-mentioned embodiments are only examples of the present invention, and it should be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principle and spirit of the present invention, so as to obtain other embodiments within the scope of the present invention.
Claims (4)
1. The air purification device based on the biomass protein system graphene nanocomposite is characterized by comprising a shell, wherein a purification cavity, an air inlet cavity and a multi-stage filter cavity are sequentially arranged in the shell from bottom to top, the cavities are separated by a porous plate, a base is arranged at the bottom of the shell, a purified air outlet structure is arranged at the top of the shell and is communicated with the multi-stage filter cavity, a graphene aerogel net column is detachably arranged in the purification cavity, a circulating water cavity is arranged outside the graphene aerogel net column, a water inlet is formed in the lower portion of the circulating water cavity, and a water outlet is formed in the upper portion of the circulating water cavity; the bottom of the purification cavity is provided with a driving base, a rotary driving motor is arranged in the driving base, a shaft of the rotary driving motor is connected with a rotating seat through a transmission shaft, the top of the rotating seat is provided with a cleaning brush, and the cleaning brush is arranged on the side face of the graphene aerogel net column in an enclosing manner; the top of the shell is also provided with a controller, the controller comprises a first control circuit and a second control circuit which are integrated on a pcb, the first control circuit is electrically connected with the second control circuit, the first control circuit is also electrically connected with a drive circuit, a selection circuit and an analog-to-digital conversion circuit respectively, the analog-to-digital conversion circuit is electrically connected with the selection circuit through an amplifier circuit, the selection circuit is electrically connected with a sensor, the sensor detects the flow rate of fluid, the second control circuit is electrically connected with an output circuit, the first control circuit is connected with an upper computer through a communication circuit, the drive circuit is directly electrically connected with a rotation drive motor, a pumping motor of a suction pump and a negative pressure drive motor in a negative pressure fan, the drive circuit controls the power of the rotation drive motor, the pumping motor of the suction pump and the negative pressure drive motor in the negative pressure fan according to a time sequence, and the first control circuit dynamically adjusts an output signal of the drive circuit according to a sensor signal; the cleaning brush comprises a shell forming an inverted round table inner cavity, a through hole is formed in the shell, a washing layer is fixed on the inner wall of the shell and comprises brush bristles and breathable cloth for fixing the brush bristles, and impurities outside the graphene aerogel net column are discharged outwards through the through holes of the breathable cloth and the through hole; the top of the graphene aerogel net post corresponds to the first porous plate, the bottom of the first porous plate is provided with a threaded cover, and the upper part of the graphene aerogel net post corresponds to an internal thread matched with the threaded cover; the multistage filtering cavity comprises filtering cotton and HEPA filtering paper which are sequentially arranged from bottom to top; the bottom of the base is provided with a movable pulley; the purified gas outlet structure comprises an air regulating valve arranged at the bottom and an air outlet cylinder arranged at the top, and the air regulating valve is connected with the air outlet cylinder through a bearing;
the first control circuit and the second control circuit adopt a single chip microcomputer, the single chip microcomputer is configured to dynamically adjust signals of the driving circuit according to the detected flow velocity of the fluid of the sensor so as to realize that the power of the rotary driving motor, the pumping motor of the suction pump and the negative pressure driving motor in the negative pressure fan can work cooperatively, and specifically: the comprehensive efficiency of a pumping motor and a negative pressure driving motor of the suction pump is lower than the efficiency of the rotation driving motor, and the efficiency of the rotation driving motor is lower than the working efficiency of water pressure on a purification cavity, so that the air needing to be purified during the working of the pumping motor and the negative pressure driving motor of the suction pump can be effectively purified, the cleaning work under the working driving of the rotation driving motor can be ensured to clean the air purification result in time, impurities outside a graphene aerogel net column can be discharged through water flow working under the water pressure in time, and the power of the rotation driving motor, the pumping motor of the suction pump and the negative pressure driving motor in the negative pressure fan can work cooperatively; a gas-leading pipe is arranged on one side in the circulating water cavity, the top of the gas-leading pipe is communicated with the gas inlet cavity in a penetrating manner, an air suction pump is arranged in the middle of the gas-leading pipe, a pump suction motor is fixed in the air suction pump, and the pipe part at the bottom of the gas-leading pipe is porous; the negative pressure fan is arranged in the air inlet cavity, one side, corresponding to the air inlet of the negative pressure fan, of the shell is latticed, and a negative pressure driving motor is arranged in the negative pressure fan.
2. The air purification device based on the biomass protein system graphene nanocomposite material as claimed in claim 1, wherein the preparation method of the graphene aerogel is as follows: preparing three-dimensional graphene aerogel by using biomass protein as a template, placing 250mg of separated biomass protein in a glass tube, adding 48mg of ascorbic acid aqueous solution into the glass tube, beating the mixture in a magnetic stirrer at a rotating speed of 1900rpm until the protein presents white colloid, adding 24mg of GO aqueous solution and 125mg of urea into the mixture, continuously stirring the mixture for 3min to form brown yellow gel, placing the gel into an oven, reducing the gel for 30min at 85 ℃ to form partially reduced graphene hydrogel, completely freezing the hydrogel at-18 ℃ in a refrigerator, thawing the gel at room temperature, continuously reducing the partially reduced graphene hydrogel at 85 ℃ for 7h to obtain graphene hydrogel, freeze-drying the graphene hydrogel to remove water in the hydrogel, carbonizing the graphene hydrogel at 800 ℃ through a high-temperature tube furnace to prepare the three-dimensional macroporous graphene aerogel, adding a proper amount of KOH into the graphene hydrogel, performing hydrothermal treatment at 180 ℃ for 2h, freeze-drying, and performing high-temperature carbonization and activation to prepare the multi-stage porous graphene aerogel.
3. The air purification method based on the biomass protein graphene nanocomposite material of the air purification device according to claim 1, characterized by comprising the steps of adsorbing impurities in air by three-dimensional macroporous graphene aerogel placed in a graphene aerogel net column, and performing cyclic washing in cooperation with cyclic washing to adsorb, circularly wash and purify the air.
4. A method for power-cooperating operation of a rotary driving motor of an air cleaning apparatus, a pumping motor of a suction pump, and a negative pressure driving motor in a negative pressure fan according to claim 1, comprising the steps of: the comprehensive efficiency of the pump suction motor and the negative pressure driving motor of the aspirator pump is lower than the efficiency of the rotary driving motor, the efficiency of the rotary driving motor is lower than the working efficiency of water pressure in the purification cavity, the cleaning work under the work drive of the rotary driving motor can be timely cleaned up the result of the air purification, and the water flow discharge of impurities outside the graphene aerogel net column can be timely through the water pressure work.
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| CN110732211B (en) * | 2019-11-12 | 2022-03-04 | 佛山科学技术学院 | Collecting and purifying equipment for particle waste gas |
| CN211913040U (en) * | 2019-12-05 | 2020-11-13 | 中铁十八局集团第四工程有限公司 | Environment-friendly ventilation unit is used in subway construction |
| CN112316699A (en) * | 2020-11-03 | 2021-02-05 | 温州拿茵农业科技发展有限公司 | Chemical industry tail gas purification absorbing device |
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2021
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