Summary of the invention
The purpose of this utility model is to overcome the shortcoming of conventional air purification techniques, and a kind of this particulate species pollutant of removal that can be simple, efficient, continuous from be infected with the air of various particulate species pollutants is provided, the device of the fresh air that acquisition can be breathed for people.
The device of particulate species pollutant in removal air provided by the invention, its structure as shown in Figure 1, comprising:
(1) at least one air cleaner AF01;
(2) at least one device A B01 that boosts, for constituent of air to be clean (containing particulate species pollutant) is introduced and drain separator, and overcomes flow path resistance and full-amount tolerance is provided, before or after can being arranged on membrane separator;
(3) at least one group of membrane separator M01, the separation membrane of membrane separator adopts non-porous film (being dense film), and the oxygen nitrogen separation of this separation membrane to be not more than 3.5(preferred, be not more than 2.5, preferred, be not more than 2.1); The unstripped gas side joint of membrane separator enters constituent of air to be clean (containing particulate species pollutant), and remained gas side is got rid of the waste gas containing particulate species pollutant, and per-meate side produces the fresh air of having held back particulate species pollutant; When being many group membrane separators, its unstripped gas side, remained gas side, infiltrating gas side are all connected in parallel;
(4) another device A B02 that boosts at least, preferred vavuum pump, in order to set up membrane separator both sides transmembrane pressure, to the fresh air after purifying is extracted from membrane separator per-meate side (suction side), and overcomes the resistance that the fluid of follow-up flow process is carried;
(5) what membrane separator unstripped gas side is connected with filter or the device A B01 that boosts introduces raw air the process pipelines of membrane separator;
(6), by the process pipelines of drawing containing particulate species pollutant and the constituent of air (being referred to as waste gas) that does not see through membrane separator of membrane separator remained gas side, when the device A B01 that boosts is arranged on after membrane separator, this process pipelines also can connect this equipment that boosts the waste gas containing particulate species pollutant of membrane separator remained gas side is led to atmosphere;
(7) fresh air by having purified membrane separator infiltrating gas side being connected with the device A B02 that boosts is drawn the process pipelines of membrane separator per-meate side.
As known technology, device also comprises necessary Control Component, so that system dynamic equipment can normally move, stops, adjusting etc.
The device of particulate species pollutant in the removal air that the utility model provides, to be different from existing conventional air filtering technique, or be the combination of various air filtration technology, it is a kind of brand-new air purifying process, also be a kind of simple, efficient, continuous air purifying process, can obtain the fresh air that can breathe for people.As shown in Figure 1, idiographic flow is as follows:
(1) first the air of being infected with various particulate species pollutants enters filter AF01 under the effect of the device A B01 that boosts, and this filter AF01 is only in order to guarantee the cleannes requirement of membrane separator to raw air, service life that can proper extension membrane separator.
(2) air of being still infected with various particulate species pollutants after aforementioned step process (has passed through filter AF01 and can reduce although be infected with the air of various particulate species pollutants, but still have a pollutant that a large amount of granularities are less than AF01 filtering accuracy) with certain wind speed, (charging wind speed is typically 1~20m/s, preferably, 4~10m/s, better for the wind speed of 8m/s) enter membrane separator M01; And control is installed with standby AB01 and another is installed with the boost capability of standby AB02, or on process pipelines, increase control valve, adjusting device to obtain separating pressure than the condition of work that is not more than 4 times, make:
At least a portion gaseous component (component outside particle-removing pollutant in the constituent of air to be clean entering from unstripped gas side, as oxygen, nitrogen etc.), because boosting device A B01, the transmembrane pressure that AB02 loads in the both sides of membrane separator, separation membrane (M01), principle by dissolving, permeate, spreading is collected in its per-meate side through membrane separator, separation membrane (M01), and discharge system as gas product, fresh air through vavuum pump AB02.
And all particulate species pollutants that contain in air to be clean all can not see through membrane separator, separation membrane (M01 because there being certain physical size to be held back by 100%, non-porous film, dense film), and as waste gas, return to atmosphere along with the other a part of gaseous component that does not see through membrane separator, separation membrane (M01) excludes system from the delay side of membrane separator under the effect of the device A B01 that boosts.
(3) as the above-mentioned purification process that carries out continuously film separation " cross-flow filtration ", the dissolving based on organic film separation principle that continues to carry out, infiltration, " cross-flow filtration " air cleaning process of diffusion is not only because " cross-flow filtration " can comprise PM2.5 by continuous purification, PM0.5, bacterium, the particulate species pollutant of the above physical size of all relative gas molecule size characteristic granularities such as thermal source and obtain fresh air, simultaneously, also because preferred by having selected oxygen nitrogen separation to be not more than 3.5(, be not more than 2.5, preferred, be not more than 2.1) separation membrane, and by the boost capability of match selection AB01 and AB02, or on process pipelines, increase control valve, adjusting device is to obtain separating pressure than the condition of work that is not more than 4 times, when loading certain transmembrane pressure and formed, membrane separator both sides are not more than the separating pressure of 4 times than (preferred, be not more than 2 times, preferred, be not more than 1.5 times) time, it is (typical that oxygen nitrogen component in obtainable fresh air is limited in the degree that suitable personnel breathe, in air, oxygen concentration is controlled in 19~40%, preferred, be controlled at 21~23%),
As above-mentioned, continue the purification process carrying out, this particulate species pollutant of removal that can be simple, efficient, continuous from be infected with the air of various particulate species pollutants, and can obtain the fresh air that can breathe for personnel.
First, the utility model is a kind of simple, efficient purification techniques.
The utility model only needs a membrane separator, and two equipment of boosting can meet the continuous purification requirement of particulate species pollutant in air, and process is simple.
The utility model by the equipment of boosting at membrane separator, the transmembrane pressure that separation membrane both sides load, because of separation membrane employing is non-porous film (dense film), gaseous component in the constituent of air (component outside particle-removing pollutant, particulate species pollutant is generally the solids fraction of certain physical size) will be by dissolving, infiltration, diffusion and see through membrane separator, separation membrane and exporting as fresh air, and any particulate species pollutant containing in air all can not see through membrane separator because there being certain physical size to be held back by 100%, separation membrane excludes system and returns to atmosphere from being detained side.What adopt is the air cleaning process of dissolving based on organic film separation principle, infiltration, diffusion, but not the air filtration purification process of the screening principle of conventional air filtering technique, can purify PM2.5, PM0.5, bacterium, the particulate species pollutant of the above physical size of all relative gas molecule size characteristic granularities such as thermal source, airborne gas component can be passed through smoothly as oxygen, nitrogen, and process is efficient.
Secondly, the utility model is the continuous purification techniques of a kind of process.
The utility model is because the continuous feed of membrane separator unstripped gas side the continuous side of being certainly detained are returned to atmosphere (conventionally, charging wind speed is typically 1~20m/s, preferably, 4~10m/s) the purging shearing force forming, this can make the particulate species pollutant being trapped after building up to certain degree, can not continue to accumulate on rete, formed a kind of " cross-flow filtration " process, but not " dead-end filtration " process of conventional filter, therefore, purification process can be continuous for a long time, conventionally, can maintain above as long as five years service life.
Secondly, the utility model can obtain the fresh air that can breathe for people.
The utility model is preferred by selecting oxygen nitrogen separation to be not more than 3.5(, be not more than 2.5, preferred, be not more than 2.1) separation membrane, and by match selection AB01 AB02 boost capability or on process pipelines, increase control valve, or adjusting device is to obtain separating pressure than the condition of work that is not more than 4 times, when loading certain transmembrane pressure and formed, membrane separator both sides are not more than the separating pressure of 4 times than (preferred, be not more than 2 times, preferred, be not more than 1.5 times) time, the total amount entering by control unstripped gas (can or increase control valve by the conveying capacity of match selection AB01 on process pipelines, or adjusting device), mate appropriate wind speed (typical, 1~20m/s, preferably, 4~10m/s), when not only can realize all particulate species pollutants that contain in entrapped air, oxygen nitrogen component in the fresh air obtaining is also (typical by the degree that is limited in suitable people's breathing, oxygen concentration in air (referring to volumetric concentration) is controlled in 19~40%, preferred, be controlled at 21~23%), and this process can not produce ozone.
In the utility model, membrane separator used can be various forms of membrane separators, as rolling, board-like, doughnut pattern, can load various forms of separation membranes, and its oxygen nitrogen separation is not more than 3.5.
In the utility model in the said air of being infected with various particulate species pollutants, its oxygen, nitrogen component are consistent with normal atmosphere, and (its oxygen concentration is 20.95%, v/v).
Said fresh air in the utility model, removed the air of the particulate species pollutant of being infected with the above physical size of various relative gas molecule size characteristic granularity, mean in this air and particulate species pollutant is thoroughly held back, and gaseous component is wherein as substantially suitable in oxygen, nitrogen component and normal atmosphere, typically, be controlled at 21~23%(v/v).
The said cross-flow filtration process of the utility model means that air to be clean has into having in a side of membrane separator, and this side and gas product passage because of separation membrane separated, from a side of membrane separator as the continuous feed of unstripped gas side and return to atmosphere from the delay side of membrane separator continuously, and the passage of gas product is an other side of membrane separator after purifying, because of the purging shearing force of unstripped gas, will to maintain pressure reduction basically identical after to a certain extent for pollutant accumulation, can not lose efficacy.
The said dead-end filtration process of the utility model means that air to be clean has into nothing in a side of filter, and this side and gas product passage because of filtering material separated, a side that is inherent filtration device is not returned to atmosphere as the continuous feed of unstripped gas side, and the passage of gas product is an other side of filter after purifying, when pollutant accumulation lost efficacy because the excessive filtering material of pressure reduction breaks after to a certain extent.
Said selective in the utility model, also claim separation, α (Alpha) value, it is commonly defined as:
α (Alpha) value, in constituent of air between nitrogen and oxygen separated selective=(Q
nitrogen/ Q
oxygen).
Q in formula
nitrogenwith Q
oxygenrepresent respectively separation membrane to the nitrogen in constituent of air to be separated and oxygen under unit interval, pressure pure component nitrogen and oxygen by the infiltration capacity of membrane material, typical as, 1 atmospheric pressure, 20 ℃, α (Alpha) value is the ratio of the infiltration capacity of this two component.
The specific embodiment
Different below in conjunction with accompanying drawing with explanation the utility model and prior art, and air cleaning process of the present utility model, in accompanying drawing:
AF01, it is conventional air filter, can be various forms of filters, comprise fibers form, filtrate form, bag type filtering, preferably employing can automatically cleaning form or the filter of various combining forms, for filtering, cleaning the raw air that enters separator, only in order to guarantee the cleannes requirement of membrane separator to raw air.
AB01, the equipment of boosting, can be various forms of compression devices, as piston type, centrifugal, screw rod, vortex, Roots, pendular ring etc. compressed format, for constituent of air to be clean (containing particulate species pollutant) is introduced and drain separator, and can overcome flow path resistance and full-amount tolerance is provided, typically, select the compression device of 100~15000Pa boost capability, preferably adopt various forms of air blasts, before also membrane separator can being arranged on, as be arranged on (not shown) on the process pipe before or after filter AF01.
M01, a kind of 3 mouthfuls of membrane separators, it can be board-like film, rolled film, hollow-fibre membrane, separation membrane in membrane separator has certain membrane area, and both sides have been divided into, one side is malleation side, one side is suction side, malleation side is also the unstripped gas side of membrane separator, also referred to as high-pressure side, remained gas side, suction side is also the infiltrating gas side of membrane separator, also referred to as low-pressure side, suction side, wherein, A0 is that the unstripped gas entrance of membrane separator also contains the entrance of particulate species pollutant air, A1 is remained gas outlet, also be poor constituent of air outlet, be rich in the waste gas outlet of particulate species pollutant, be disposed to atmosphere, A2 is that membrane separator suction side is also per-meate side outlet, through thoroughly having removed the fresh air outlet of particulate species pollutant.
AB02, also be the equipment of boosting, can be various forms of compression devices, as piston type, centrifugal, screw rod, vortex, Roots, pendular ring etc. compressed format, be used for the fresh air after purifying to extract from membrane separator suction side, and overcome the resistance of the fluid conveying of follow-up flow process, typical, the compression device of selecting 10~80KPa boost capability, preferably adopts various forms of vavuum pumps.
Idiographic flow is as follows:
(1) first the air of being infected with various particulate species pollutants enters filter AF01 under the effect of the device A B01 that boosts, and this filter AF01 is only in order to guarantee the cleannes requirement of membrane separator to raw air, service life that can proper extension membrane separator.
(2) air of being still infected with various particulate species pollutants after aforementioned step process (has passed through filter AF01 and can reduce although be infected with the air of various particulate species pollutants, but still have a pollutant that a large amount of granularities are less than AF01 filtering accuracy) (typical with certain wind speed, as the wind speed of 8m/s) enter membrane separator M01, wherein:
At least a portion gaseous component (component outside particle-removing pollutant in the constituent of air to be clean entering from unstripped gas side, as oxygen, nitrogen etc.), because boosting device A B01, the transmembrane pressure that AB02 loads in the both sides of membrane separator, separation membrane (M01), principle by dissolving, permeate, spreading is collected in its per-meate side through membrane separator, separation membrane (M01), and discharge system as gas product, fresh air through vavuum pump AB02.
And all particulate species pollutants that contain in air to be clean all can not see through membrane separator, separation membrane (M01 because there being certain physical size to be held back by 100%, non-porous film, dense film), and as waste gas, return to atmosphere along with the other a part of gaseous component that does not see through membrane separator, separation membrane (M01) excludes system from the delay side of membrane separator under the effect of the device A B01 that boosts.
(3) as in the purification process of the above-mentioned film carrying out continuously separated " cross-flow filtration ", the dissolving based on organic film separation principle that continues to carry out, infiltration, " cross-flow filtration " air cleaning process of diffusion is not only because " cross-flow filtration " can continuous purification PM2.5, PM0.5, bacterium, the particulate species pollutant of the above physical size of all relative gas molecule size characteristic granularities such as thermal source and obtain fresh air, simultaneously, also because preferred by having selected oxygen nitrogen separation to be not more than 3.5(, be not more than 2.5, preferred, be not more than 2.1) separation membrane, and by match selection AB01 AB02 boost capability or on process pipelines, increase control valve, adjusting device is to obtain separating pressure than the condition of work that is not more than 4 times, when loading certain transmembrane pressure and formed, membrane separator both sides are not more than the separating pressure of 4 times than (preferred, be not more than 2 times, preferred, be not more than 1.5 times) time, oxygen nitrogen component in obtainable fresh air is also (typical by the degree that is limited in suitable personnel's breathing, in air, oxygen concentration is controlled in 19~40%, preferred, be controlled at 21~23%).
As above-mentioned, continue the purification process carrying out, this particulate species pollutant of removal that can be simple, efficient, continuous from be infected with the air of various particulate species pollutants, and can obtain the fresh air that can breathe for personnel.
Different from conventional air purification techniques, conventional air purification method is for obtaining the higher efficiency of holding back, as operating room purify in for obtaining the better purifying space of " hundred " level, conventionally need to adopt the more filter of high filtering precision, even multiple purification techniques means combine and can meet purification requirement, and, because these technological means are all " dead-end filtration " technology, 3 months, even 1, within 2 months, need more renew cartridge can meet the required operation pressure reduction requirement of continuous use, and method of the present invention, with relatively succinct technique, not only realized efficiently and having held back, can 100% hold back airborne various particulate species pollutants to be clean, also because of the film isolation of purified process of " cross-flow filtration ", make purification process continuous, and, also because selecting oxygen nitrogen separation to be not more than 3.5 separation membrane, and by match selection AB01 AB02 boost capability or on process pipelines, increase control valve, adjusting device is to obtain separating pressure than the condition of work that is not more than 4 times, when membrane separator both sides load certain transmembrane pressure and formed when being not more than the separating pressure of 4 times and comparing, oxygen nitrogen component in obtainable fresh air also will be limited in the degree of suitable personnel's breathing.
The utility model priority application is in can 100% holding back airborne various particulate species pollutants to be clean, and the lasting oxygen nitrogen component obtaining in fresh air is limited in the air cleaning process of the degree of suitable personnel's breathing, but disclosed basic principle can be used for much other separated occasions, as adopted the gas separation membrane that oxygen nitrogen component be there is no to separating property, only to hold back the purification process of airborne various particulate species pollutants to be clean.
An object lesson of removing the device of particulate species pollutant in air, connects by accompanying drawing 1, wherein, the board-like membrane separator that membrane separator adopts Shanghai company to produce, the oxygen nitrogen separation of its separation membrane is 2.04, membrane area loadings is 113.25m
2, supporting type selecting 1 flow 465m
3/ h, the air blast of blast 300Pa is in order to carry dustiness to reach 10g/m
3, 0.1 micron of minimum mean particle dia the high dust laden air of particulate species pollutant enter membrane separator, another supporting pumping speed 156m at 1 20 ℃
3/ h, vacuum 20.3KPa, the vavuum pump of installed power 1.1KW, in the lower time of condition of relative humidity RH70% in 25 ℃ of following environment temperatures of operation, air, has obtained fresh air 116.31 m containing oxygen 22.85% without any particulate species pollutant
3/ hr.
。