CN110193253A - One kind is except haze device, preparation method and its removes haze method - Google Patents
One kind is except haze device, preparation method and its removes haze method Download PDFInfo
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- CN110193253A CN110193253A CN201910447269.7A CN201910447269A CN110193253A CN 110193253 A CN110193253 A CN 110193253A CN 201910447269 A CN201910447269 A CN 201910447269A CN 110193253 A CN110193253 A CN 110193253A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0001—Making filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0032—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions using electrostatic forces to remove particles, e.g. electret filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/546—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using nano- or microfibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
- B01D2239/0216—Bicomponent or multicomponent fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/0604—Arrangement of the fibres in the filtering material
- B01D2239/0631—Electro-spun
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/0604—Arrangement of the fibres in the filtering material
- B01D2239/0636—Two or more types of fibres present in the filter material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/10—Filtering material manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/12—Special parameters characterising the filtering material
- B01D2239/1208—Porosity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/12—Special parameters characterising the filtering material
- B01D2239/1291—Other parameters
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Nanotechnology (AREA)
- Nonwoven Fabrics (AREA)
- Filtering Materials (AREA)
Abstract
The invention discloses one kind except haze device, preparation method and its to remove haze method, belongs to except haze field.One kind removing haze device, and the substrate including having hole, the substrate with hole is equipped with the filter membrane being made of two or more polymer nanofibers.It is a kind of to remove haze method except haze device, except haze device is mounted on high-rise piping shaft, elevator, staircase or/and ventilation shaft.Of the invention removing after haze device cleans may be reused, and cost is controllable.Haze method should be removed by building inside and outside temperature difference bring " stack effect " during heating in upgrade set, ascending air in building is filtered by the filtration system in building and achieve the purpose that purify premises air except haze, except haze is accurate, energy-saving and environmental protection.
Description
Technical field
It is especially a kind of except haze device, preparation method and its except haze method the invention belongs to remove haze field.
Background technique
In recent years, with economic development and urbanization process, including industrial waste gas, vehicle exhaust, construction site and road
The brings city haze problems such as fugitive dust and natural fugitive dust that traffic generates are also further serious.Form the major pollutants of haze
Particulate matter PM10 and PM2.5, wherein PM2.5 particle due to its partial size it is small, surface area is big, and activity is strong, easily subsidiary toxic, harmful
Substance, and residence time length, conveying distance in an atmosphere is remote, thus more to the harm of human health and atmosphere quality
Greatly.Therefore, the top priority for improving haze weather and air quality is control PM2.5.Statistical result showed over the years, China north
Square city haze weather often has direct connection with season, and the particulate matter that northern China heating generates is under worst case meteorological conditions
It is difficult to dissipate by atmospheric circulation, becomes the important sources of autumn and winter air pollution.
In the case where pollution sources cannot prevent completely, how inexpensive purifying city air long-term effectively is at scholar
The project that expert competitively studies.Currently, spray dust-arrest is still the outdoor main means for removing haze, based on vehicle-mounted sprinkle water and spray system
System, use scope, which exists, to be only capable of improving the air quality near car body within the scope of tens meters compared with big limitation.To cover simultaneously
City arterial street needs more dust suppression vehicles to work at the same time, and more set dust pelletizing systems are not only at high cost but also power consumption is big.Another party
The water in face, vehicle-mounted sprinkle water and spray system sprinkling cannot recycle, big to water resource waste.Meanwhile water mist can not be for a long time
The content of suspended particulate in air is persistently inhibited to increase.In addition to spray dust-arrest removes haze, new haze device, packet are removed there are also some at present
It includes except haze tower, except haze street lamp and ecology eliminate haze pavement structure etc..Except haze tower is also known as large-sized solar urban air cleaning system
System carries out the building structure of air cleaning using solar energy and filtering technique.Except haze tower is assembled by coated glass heating tower bottom
Air, push tower in thermal current rise, tower bottom sucking air be arranged in thermal-arrest canopy filter screen wall filtering, remove various
Pollutant and impurity promote the efficiency of purification air in conjunction with the blower of tower top.In conjunction with the photocatalysis coating on coated glass surface,
Reduce the activity at haze factor NO and other volatile organic matters in air.Except theoretically daily handling ability reaches 500 to haze tower
Ten thousand stere air, process range cover the one thousandth of insufficient urban size (in terms of except haze tower location municipal administration area
Amount).Meanwhile except the cost of haze tower is up to 10,000,000, annual operating cost 200000, high cost to be difficult to promote except haze tower.
Except haze street lamp uses photovoltaic power generation, the particulate matter in road and neighbouring natural airflow is adsorbed to realize air by electrostatic effect
Purification.Due to the limitation of street lamp itself geometric dimension and street lamp quantity, except haze effect is it is contemplated that deficiency.Except haze purification function
Ecology pavement structure by that will filter out haze technology except haze technology by spraying and combine with crossing, by laying porous pavement and in vehicle
Rainwater conveyance conduit is arranged in trade area and pavement area underground, as the main water for removing haze by spraying after the rainwater storage filtering of collection
Source will further be crossed after filtering out residue collection obtained by haze and dmp filter as the green main component for planting soil, make fugitive dust particle
Object forms aggregation and sedimentation, is effectively improved the environment of urban road and air quality and beautifies the environment.Except haze road surface laying with
Operating cost is high, while the water source strong depend-ence precipitation of haze, the sky of the north city short of rain for winter drying are removed as purification
Gas detergent power is insufficient.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, provide it is a kind of except haze device, preparation method and its
Except haze method.
In order to achieve the above objectives, the present invention is achieved by the following scheme:
One kind removing haze device, and the substrate including having hole, the substrate with hole is equipped with by two or more
The filter membrane that polymer nanofiber is constituted.
It further, further include bellows, the substrate with hole is located at the air outlet of bellows.
Further, the substrate with hole is window screening or honeycomb paper.
A kind of preparation method except haze device, comprising the following steps:
1) two or more spinning solutions is prepared；
2) substrate with hole is received into substrate using spinning solution as spinning while carries out electrostatic spinning.
Further, further comprising the steps of:
3) substrate with hole after the completion of spinning is located at the air outlet of bellows.
It is a kind of to remove haze method except haze device based on above-mentioned, except haze device is mounted on high-rise piping shaft, elevator, stair
Between or/and ventilation shaft.
Compared with prior art, the invention has the following advantages:
Of the invention removes haze method except haze device, by building inside and outside temperature difference bring during heating in upgrade set
" stack effect " filters ascending air in building by the filtration system in building and achievees the purpose that purify premises air except haze；
Compared to haze tower is removed, the movement of additional energy certain driving air-flow should not be needed except haze method, while not being needed consumption water source and being removed haze by spraying,
Purification process energy conservation and environmental protection；According to data statistics, end 2017, China has possessed 8 layers or more, the skyscraper more than 24 meters
34.7 ten thousand, semi-high-rise housing 23.5 ten thousand, wherein being within northern operational central heating area 2010 43.57 hundred million squares
Rice, reaches 77.73 hundred million square metres for 2017, annual average compound growth rate 9%；Haze is removed for open urban, each high level is lived
Residence all can serve as the purification for realizing ambient air in heating season " except haze tower ", this distributed region-wide purification and urban human
Class life is consistent to the distributed needs of pure air, except haze is accurate, energy conservation, and environmental protection.
Of the invention removes haze device, and the presence of bellows can guarantee that the rate into the wind of filter screen has certain wave
Dynamic property, and except may be reused after the filtering Membrane cleaning of haze device, cost it is controllable.
The preparation method except haze device of the invention, prepares composition polymer nanofiber using the method for electrostatic spinning,
Polymer solution or melt are carried out a kind of special spinning process of jet spinning, electrostatic spinning by electrostatic spinning in high voltage electric field
Nano fibrous membrane out has large specific surface area (10~40m2/ g), porosity it is high (> 80%), preparation process is simply and at low cost
The advantages that honest and clean.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram except haze device provided by the invention.
Wherein: 1- has the substrate of hole；2- filter membrane；3- bellows；4- support base.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
Embodiment 1
The production of window screening filter membrane:
1) two or more spinning solutions is prepared；PVC is dissolved in the mixed solution of dimethylformamide and tetrahydrofuran,
PVC mass ratio is 15%, and dimethylformamide is 3:1 than tetrahydrofuran volume ratio in solution；
Nylon -66 is dissolved in formic acid with mass ratio 20%, and course of dissolution is heated and stirred；
2) window screening is received into substrate using spinning solution as spinning while carries out electrostatic spinning；By above two Static Spinning
Electrospinning device is added in silk liquid, and it is that spinning receives substrate ground connection, two kinds quiet that metallic yarn, which makees (100cm × 100cm, 11 mesh),
Electrospun liquid carries out spinning at the same time.Keeping spinneret distance is 30cm；PVC spinning solution voltage is 12KV, flow velocity 1.5mL/h；
Nylon -66 spinning solution voltage is 20KV, flow velocity 0.5mL/h；Environment temperature is 25 DEG C, humidity 30%；Spinning sweep speed
50cm/min；Fiber-forming polymer can also be one of PVA, PVC, PVDF, nylon66 fiber, PVP, PMMA and PS or a variety of；Solvent
It can be one of dimethylformamide, dimethyl acetamide, tetrahydrofuran, acetone, methyl pyrrolidone, formic acid or more
Kind.
Embodiment 2
The production of building body filtration system:
1) two or more spinning solutions is prepared；PVC is dissolved in the mixed solution of dimethylformamide and tetrahydrofuran,
PVC mass ratio is 15%, and dimethylformamide is 3:1 than tetrahydrofuran volume ratio in solution；
Nylon -66 is dissolved in formic acid with mass ratio 20%, and course of dissolution is heated and stirred；
2) honeycomb paper is received into substrate using spinning solution as spinning while carries out electrostatic spinning；By above two electrostatic
Electrospinning device is added in spinning liquid, and honeycomb paper (aperture side 6mm, thick 1cm) receives substrate ground connection, two kinds quiet as spinning
Electrospun liquid carries out spinning at the same time；Keeping spinneret distance is 30cm；PVC spinning solution voltage is 12KV, flow velocity 1.5mL/h；
Nylon -66 spinning solution voltage is 20KV, flow velocity 0.5mL/h；Environment temperature is 25 DEG C, humidity 30%；Spinning sweep speed
30cm/min。
3) honeycomb paper after the completion of spinning is fixed on the inner wall of bellows；Using HDPE bellows (internal diameter Φ=
10cm, long 20cm) it is used as filtration system air inlet pipe, the honeycomb paper for being covered with electrostatic spinning polymer strainer is cut into Φ=10cm's
Disk be placed in bellows and with tube wall sealant and, strainer side is towards airintake direction；Bellows is arranged in the form of 5 × 5 one groups
Column, bellows are connected with each other.
Embodiment 3
The production of window screening filter membrane:
1) two or more spinning solutions is prepared；PVDF is dissolved in the mixed solution of dimethylformamide and acetone,
PVDF mass ratio is 15%, and dimethylformamide and acetone volume ratio are 9:1 in solution；
Nylon -66 is dissolved in formic acid with mass ratio 20%, and course of dissolution is heated and stirred；
2) window screening is received into substrate using spinning solution as spinning while carries out electrostatic spinning；By above two Static Spinning
Electrospinning device is added in silk liquid, and it is that spinning receives substrate ground connection that nylon window screening, which makees (100cm × 100cm, 20 mesh), two kinds
Electrostatic spinning liquid carries out spinning at the same time；Keeping spinneret distance is 30cm；PVDF spinning solution voltage is 10KV, flow velocity 1.5mL/
h；Nylon -66 spinning solution voltage is 20KV, flow velocity 0.5mL/h；Environment temperature is 25 DEG C, humidity 30%, spinning scanning speed
Rate 50cm/min.
Embodiment 4
The production of building body filtration system:
1) two or more spinning solutions is prepared；PVDF is dissolved in the mixed solution of dimethylformamide and acetone,
PVDF mass ratio is 15%, and dimethylformamide and acetone volume ratio are 9:1 in solution；
Nylon -66 is dissolved in formic acid with mass ratio 20%, and course of dissolution is heated and stirred.
2) honeycomb paper is received into substrate using spinning solution as spinning while carries out electrostatic spinning；By above two electrostatic
Electrospinning device is added in spinning liquid, and honeycomb paper (aperture side 6mm, thick 1cm) is that spinning receives substrate ground connection, two kinds of electrostatic
Spinning solution carries out spinning at the same time；Keeping spinneret distance is 30 centimetres；PVDF spinning solution voltage is 10KV, flow velocity 1.5mL/h；
Nylon -66 spinning solution voltage is 20KV, flow velocity 0.5mL/h；Environment temperature is 25 DEG C, humidity 30%；Spinning sweep speed
30cm/min。
3) substrate 1 after the completion of spinning is fixed on the inner wall of ventilation duct 3；Using PVC bellows (internal diameter Φ=
10cm, long 20cm) it is used as filtration system air inlet pipe, the honeycomb paper for being covered with electrostatic spinning polymer strainer is cut into Φ=10cm's
Disk be placed in bellows and with tube wall sealant and, strainer side is towards airintake direction；Bellows is arranged in the form of 5 × 5 one groups
Column, bellows are connected with each other.
The invention will be described in further detail with reference to the accompanying drawing:
Referring to Fig. 1, Fig. 1 is a kind of structural schematic diagram except haze device provided by the invention；Except haze device includes having hole
Substrate 1, filter membrane 2, bellows 3 and the support base 4 of gap, the substrate 1 with hole be honeycomb paper, honeycomb paper be equipped with by two kinds with
On the filter membrane 2 that constitutes of polymer nanofiber, the two is mounted on the air outlet of bellows 3, filter membrane 2 as a whole
Towards the inside of bellows 3；It should be additionally provided with support base 4 except haze device, for bellows 3 to be formed to fixed shape.
It is of the invention except haze device except haze principle is as follows:
During central heating, the indoor temperature of high residential building is higher than outdoor temperature, and internal-external temperature difference forms " cigarette in high residential building
Chimney effect ".Periphery cold air is built out of low layer sucking building, by vertical duct well in building, elevator, after staircase heating from
Roof discharge.By installing filtering window screening in lowrise layer, in piping shaft, ventilation shaft, elevator, staircase installation filter device mistake
Filter purification of the particulate matter realization to air near building body in the ascending air that high residential building " stack effect " generates.
Filtering window screening is made using electrostatic spinning technique.One or more polymer are by electrostatic spinning on window screening substrate
Perforated membrane is formed, includes a large amount of ducts in perforated membrane, possesses very high specific surface area, there is good granular absorption ability.This
Window screening perforated membrane is filtered in invention is used to filter the particulate matter that absorption is entered by window in high residential building lowrise layer indoor air,
Realize that the first order removes haze.
Filter screen in filter device is made using electrostatic spinning.Polymer passes through electrostatic spinning shape on honeycomb paper substrate
At perforated membrane.Perforated membrane includes no less than two kinds of polymer.Filter device outer casing inner wall be corrugated surface, ripple direction with
Airintake direction intersection, the air-flow into filter device fluctuate after corrugated surface, and fluctuation air-flow is multiple across polymer
It closes perforated membrane and causes vibration of membrane, vibration makes different polymer contact-separation in perforated membrane.Electricity of the different polymer for surface
Lotus fetters that ability is variant, and when polymer contact, charge is redistributed in different polymer surfaces.Gather after multiple-contact-separation
The xenogenesis charge for closing the accumulation of object surface forms electric microfield between duct.Electric microfield in filter membrane can be effective by electrostatic interaction
Adsorb the particulate matter in air.Electrostatic spinning polymer film possesses very big specific surface area, and contact-separation process can be accumulated effectively
Tire out more charges, generates stronger electric microfield.Meanwhile the small duct of enormous amount is contained in film, these characteristics more have
Help absorption except haze.Filter device is respectively arranged in vertical piping shaft, elevator, staircase, ventilation shaft in building in the present invention
And roof platform exit realizes that second level and three-level remove haze for filtering the particulate matter in absorption building in ascending air.
The present invention proposes that a kind of zero energy consumption based on city high level residential houses " stack effect " removes haze method and correlation is removed
Haze system.For the most height of newly-built civil high storey house close to 100 meters, floor is more than 30 layers at present, far more than having except haze tower
60 meters.It is not less than 18 DEG C according to the national standard heating indoor temperature of standard, it is contemplated that mean temperature outside northern China winter room is usually high
The floor building building inside and outside temperature difference is more than 20 DEG C." stack effect " is formed in this temperature official post high residential building.Build the cold sky in periphery
Gas is out of low layer sucking building, and by vertical duct well in building, elevator, staircase is discharged after rising from roof.The present invention passes through
Filtering window screening is installed in lowrise layer, in piping shaft, ventilation shaft, elevator, staircase installation filter device filtering high residential building " cigarette
The particulate matter in ascending air that chimney effect " generates realizes the purification to air near building body.Pass through filtering net cleaning air master
If removing haze by the particulate matter in the huge specific surface area absorption air in duct in porous filter screen for further promotion strainer
Effect, the present invention use composition polymer filter membrane except the filter device of haze system, and filter membrane includes a large amount of ducts, while a variety of
The electric microfield that polymer contact is formed in duct can further adsorb particulate matter by electrostatic interaction.Compared to common filter screen
Porous absorption, the composition polymer filter screen that the present invention is made using electrostatic spinning is except haze effect is more excellent.
The above content is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all to press
According to technical idea proposed by the present invention, any changes made on the basis of the technical scheme each falls within claims of the present invention
Protection scope within.
Claims (6)
1. one kind removes haze device, which is characterized in that including the substrate (1) with hole, set on the substrate (1) with hole
There is the filter membrane (2) being made of two or more polymer nanofibers.
2. according to claim 1 remove haze device, which is characterized in that further include bellows (3), the base with hole
Plate (1) is located at the air outlet of bellows (3).
3. according to claim 1 remove haze device, which is characterized in that the substrate (1) with hole is window screening or bee
Nest paper.
4. a kind of preparation method according to claim 1 except haze device, which comprises the following steps:
1) two or more spinning solutions is prepared；
2) substrate (1) with hole is received into substrate using spinning solution as spinning while carries out electrostatic spinning.
5. the preparation method according to claim 4 except haze device, which is characterized in that further comprising the steps of:
3) substrate (1) with hole after the completion of spinning is located at the air outlet of bellows (3).
6. a kind of according to claim 1-3 except haze device is except haze method, which is characterized in that except haze device is pacified
Mounted in high-rise piping shaft, elevator, staircase or/and ventilation shaft.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910447269.7A CN110193253A (en) | 2019-05-27 | 2019-05-27 | One kind is except haze device, preparation method and its removes haze method |
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| CN201910447269.7A CN110193253A (en) | 2019-05-27 | 2019-05-27 | One kind is except haze device, preparation method and its removes haze method |
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