CN105136636A - Atmospheric-particulates dehumidifying apparatus and method - Google Patents
Atmospheric-particulates dehumidifying apparatus and method Download PDFInfo
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Abstract
The invention relates to an atmospheric-particulates dehumidifying apparatus and a method. The atmospheric-particulates dehumidifying apparatus comprises a Nafion tube dehumidifying unit, a particle characterstic measuring unit, a particle purifying unit and a sucking pump. The atmospheric-particulates dehumidifying method is based on a Nafion tube dehumidifying principle, steam in a to-be measured sample gas is removed through a low-pressure high-flow-velocity drying gas blowing process, and lossless non-contact continuous dehumidifying of atmospheric particulates is realized. In order to guaranteeing the cleanliness of the blowing gas, the method firstly employs an inertia bumping manner for removing particles with micrometer-grade particle size in the blowing gas, and then removing nanoscale fine particles in the blowing gas by combining field ionization charging and electrostatic traction. The method also utilizes a process of combining a flow-limiting valve and a large-power suction pump, and thus the blowing gas pressure is lower than a sample gas pressure, and the drying efficiency of the whole atmpospheric-particulates dehumidifying apparatus is substantially improved.
Description
Technical field
The present invention relates to atmospheric aerosol monitoring technical field, be specifically related to a kind of Atmospheric particulates dehydrating unit and method.
Background technology
In recent years, domestic and international gray haze event takes place frequently, and the ozone of high concentration and fine particle (PM2.5) pollute the main contamination characteristics having become current atmospheric.Along with the appearance of national PM2.5 air quality standard, the surveying instrument demands such as domestic and international all kinds of fine particle quality concentration increase, but because under varying environment, the difference of relative humidity of atomsphere causes the difference of the water percentage of fine particle own, particle humid control before test becomes one of key issue affecting Instrument measuring precision, therefore, each instrument manufacturing company adopts each class methods to reduce particle sample air humidity degree one after another.
For the humid control of particle, usually adopt drying agent adsorption and dehumidification or heating and dehumidification.For drying agent adsorption and dehumidification, drying agent needs periodic replacement, and cannot realize the long-term non-maintaining operation under unmanned state, meanwhile, because steam is from-inner-to-outer Diffusion moisture absorption, therefore dehumidification rate progressively can reduce along with the inefficacy of internal layer drying agent.And for heating and dehumidification, due to change particle residing for environment temperature, removal moisture while, also can make other volatile component generation vaporization at high temperature of particle, thus affect measuring accuracy.
Chinese invention patent application CN101524617 discloses a kind of method that moisture content in gas removed by Nafion pipe, but sample gas (processor) first will be heated to 100-120 by the instrument in the method
oc degree, follow-up gas circuit also needs to connect millipore filter simultaneously, and therefore, the method can not be applied to the instrument dehumidifying of ambient particle thing surveying instrument.Chinese invention patent application CN103759998A discloses a kind of air dehumidification processes and device, the air needing to dehumidify is introduced the dehumidifying gas passage between dehumidification pipe inwall, simultaneously, residue dry atmosphere backflow after dehumidification pipe dehumidifying enters in air return plenums, thus realize dry gas be cycled to repeat application.But, due to through dehumidification pipe dehumidifying after residue dry atmosphere backflow enter in air return plenums time, not through any particle purifying device, after long-play, internal layer drying tube outer wall will be contaminated, thus reduce drying efficiency; Meanwhile, in this operating mode, backflow (purging) airshed, far below air to be dried, even if under the condition having fixation pressure difference, is also difficult to realize efficient dehumidifying for a long time.
Summary of the invention
The object of the present invention is to provide a kind of Atmospheric particulates dehydrating unit and method, this dehydrating unit and method can solve deficiency of the prior art, dynamic realtime control is carried out to Atmospheric particulates sample air humidity degree, thus effectively eliminates the impact of ambient humidity change on particle monitoring instrument measuring accuracy.
For achieving the above object, present invention employs following technical scheme:
A kind of Atmospheric particulates dehydrating unit, comprises Nafion pipe Dehumidifying element, particle characterisitic parameter measuring unit, particle purifying unit and aspiration pump.
Described Nafion pipe Dehumidifying element comprises outer tube and embeds the inner tube be arranged in the middle of outer tube; Sweep gas path is formed between described outer tube inwall and inner tube outer wall; The two ends up and down of described outer tube sidewall are respectively equipped with the sweep gas gas outlet and sweep gas air intake opening that are connected with sweep gas path, and described sweep gas gas outlet is connected with the air intake opening of aspiration pump; The two ends up and down of described inner tube are respectively equipped with the sample gas air intake opening and sample gas gas outlet that are connected with inner tube inside, and described sample gas air intake opening, inner tube inside and sample gas gas outlet form sample air dry path; Described sample gas gas outlet is connected with the draft tube of particle characterisitic parameter measuring unit.
Described particle purifying unit comprises flow-limiting valve, impacting type particle cutter and electrostatic fine particle remover; Described flow-limiting valve is provided with primary air inlet, auxiliary gas air intake opening and mixed gas outlet; The shock platform that described impacting type particle cutter comprises cutter cavity, is arranged on the acceleration spout at cutter cavity top and is detachably arranged in cutter cavity inner bottom surface; Described electrostatic fine particle remover comprises remover cavity, is arranged on the effluve pin at the upper and lower two ends of remover cavity and high pressure extraction electrodes, the effluve pin power supply be electrically connected with effluve pin and the high pressure extraction electrodes power supply be electrically connected with high pressure extraction electrodes; Described primary air inlet is connected with the escape pipe of particle characterisitic parameter measuring unit; Described auxiliary gas air intake opening connects outside dry air source; Described mixed gas outlet is connected with the inlet end accelerating spout; The inlet end of described acceleration spout is positioned at the external side of cutter lumen, and outlet side is positioned at cutter inside cavities and is connected with cutter inside cavity; Described cutter cavity is connected on remover cavity wall, and cutter inside cavity is connected with remover inside cavity; Described remover cavity lower end sidewall is provided with clean gas outlet, and described clean gas outlet is connected with sweep gas air intake opening.
Further, described particle characterisitic parameter measuring unit adopts particle characterisitic parameter measuring instrument or monitor.Described particle characterisitic parameter measuring instrument or monitor comprise the conventional particle surveying instrument in the environmental monitoring fields such as mass concentration, Size, nephelometer, delustring instrument.
Further, described acceleration spout comprises the acceleration jet accelerating shower nozzle and be arranged in the middle of acceleration shower nozzle, and described acceleration jet is inverted cone-shaped.Described shock platform is the right cylinder coaxially arranged with acceleration jet, and described shock platform is threaded in the bottom in cutter cavity, and the junction of clashing into platform and cutter cavity is provided with O RunddichtringO.
Further, described effluve pin is tungsten pin, described effluve pin power acquisition negative pressure direct supply; Described high pressure extraction electrodes is the rod iron arranged with effluve coaxial needle, and one end of this rod iron is arranged on the bottom of remover cavity, and the other end is semisphere; Described high pressure extraction electrodes voltage adopts negative pressure direct supply.
Further, described cutter cavity and remover cavity all adopt alumina based material.
Further, the air pump that described aspiration pump employing air-flow velocity is controlled.
The invention still further relates to a kind of dehumanization method of Atmospheric particulates dehydrating unit, the method comprises the following steps:
(1) first, sampling air flow enters in the sample air dry path in Nafion pipe Dehumidifying element inner tube by sample gas air intake opening; Then, in the flow process in sample air dry path, its water vapor permeable in the sweep gas in the sweep gas path between inner tube and outer tube, is completed sampling air flow drying process by sampling air flow; Finally, the sampling air flow after completing dry process flows out to particle characterisitic parameter measuring unit through sample gas gas outlet from Nafion pipe Dehumidifying element;
(2) sampling air flow carried out after dry process through Nafion pipe Dehumidifying element carries out the measurement of particle characterisitic parameter in particle characterisitic parameter measuring unit, and flows into particle purifying unit after completing the measurement of particle characterisitic parameter;
(3) sampling air flow in particle purifying unit is flowed into, together with the secondary air entered by auxilairy air intake, converge into purging air-flow, impacting type particle cutter is first adopted to retain removal micron order bulky grain thing wherein, electrostatic fine particle remover is adopted to retain removal nanoscale fine particle wherein again, finally the air-flow removing particle is entered in sweep gas path by the sweep gas air intake opening of Nafion pipe Dehumidifying element, carry out sampling air flow moisture absorption process, and discharged by sweep gas gas outlet under the driving of aspiration pump.
Compared to the prior art, beneficial effect of the present invention is:
(1) the present invention adopts Nafion pipe to carry out removal moisture drying to sampling air flow, by the sweep gas between inner tube and outer tube, the steam in sampling air flow is uninterruptedly discharged, this can not only increase substantially sample gas dehumidification rate, can also solve the problem needing frequently to change drying agent in traditional adsorption and dehumidification process.The present invention is applicable to the front end free of losses dehumidifying on all kinds of environmental sampler.
(2) the whole process of sample gas dehumidifying of the present invention is all at room temperature carried out, and without the need to heating and condensation sampling air flow, thus remains the primary characteristic of Atmospheric particulates to greatest extent.
(3) the bulky grain thing in the sampling air flow after the present invention adopts impacting type particle cutter to remove dry process, adopt electrostatic fine particle remover simultaneously, utilize the charged small particle removed with the mode of electrical field draw in the sampling air flow after drying process of field-ionization, thus the cleaning process completing the sampling air flow after dry process obtains clean dried gas, makes this clean dried gas as sweep gas to carry out the moisture absorption process of sampling air flow.In addition, particle purifying unit of the present invention adopts demountable structure, has the features such as later stage cleaning is easy to maintenance, effectively can solve that conventional film filtrator exists expensive, need frequently to change the problems such as replacing.
(4) the present invention adopts the mode that flow-limiting valve and active source of the gas (namely from the dry air source of auxilairy air intake access) combine, the draught head between sampling air flow and sweep gas can be improved, ensure the atmospheric pressure of sweep gas atmospheric pressure lower than sampling air flow, improve the drying efficiency of Nafion pipe Dehumidifying element.The present invention, on the basis realizing the dehumidifying of sample gas, achieves the recycling of dried sample gas.In the present invention, even if not from auxilairy air intake access dry air source, the dehumidifying to sample gas also can be realized.
(5) the present invention has compact conformation, the feature such as easy to maintenance, is not only applicable to the sample gas dehumidifying in the conventional sense of laboratory, can also to be applied under the mal-condition of outfield the occasions such as the long non-maintaining dehumidifying of sample gas.
Accompanying drawing explanation
Fig. 1 is the structural representation of Atmospheric particulates dehydrating unit;
Fig. 2 is the structure principle chart of inertial impaction formula particle cutter.
Wherein:
100, Nafion pipe Dehumidifying element, 101, sample gas air intake opening, 102, sample gas gas outlet, 103, sweep gas air intake opening, 104, sweep gas gas outlet, 105, inner tube, 106, outer tube, 200, particle characterisitic parameter measuring unit, 300, particle purifying unit, 301, effluve pin power supply, 302, flow-limiting valve, 303, primary air inlet, 304, auxiliary gas air intake opening, 305, mixed gas outlet, 306, accelerate spout, 307, impacting type particle cutter, 308, clash into platform, 309, effluve pin, 310, electrostatic fine particle remover, 311, high pressure extraction electrodes, 312, clean gas outlet, 400, aspiration pump.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described:
A kind of Atmospheric particulates dehydrating unit as shown in Figure 1, comprises Nafion pipe Dehumidifying element 100, particle characterisitic parameter measuring unit 200, particle purifying unit 300 and aspiration pump 400.
Further, described Nafion pipe Dehumidifying element 100 comprises outer tube 106 and embeds the inner tube 105 be arranged in the middle of outer tube 106.Described Nafion pipe Dehumidifying element is column type or plane, and described inner tube 105 is at least 1.The Nafion pipe of plane, mainly in order to increase the contact area of sample gas and inner tube tube wall, thus reduces the length of Nafion pipe.Sweep gas path is formed between described outer tube 106 inwall and inner tube 105 outer wall.The two ends up and down of described outer tube 106 sidewall are respectively equipped with the sweep gas gas outlet 104 and sweep gas air intake opening 103 that are connected with sweep gas path, and described sweep gas gas outlet 104 is connected with the air intake opening of aspiration pump 400.The two ends up and down of described inner tube 105 are respectively equipped with the sample gas air intake opening 101 and sample gas gas outlet 102 that are connected with inner tube 105 inside, and described sample gas air intake opening 101, inner tube 105 inside and sample gas gas outlet 102 form sample air dry path; Described sample gas gas outlet 102 is connected with the draft tube of particle characterisitic parameter measuring unit 200.Described sample gas air intake opening 101, sample gas gas outlet 102, sweep gas air intake opening 103 and sweep gas gas outlet 104 are hollow cylindrical.
Further, described particle characterisitic parameter measuring unit 200 adopts particle characterisitic parameter measuring instrument or monitor.Described particle characterisitic parameter measuring instrument or monitor comprise the conventional particle surveying instrument in the environmental monitoring fields such as mass concentration, Size, nephelometer, delustring instrument.Object of the present invention is exactly the dry particle in test sample gas, needs the relative humidity reducing sample gas, thus ensures the accuracy of particle measurement result, for meteorology, environmental protection, scientific research etc. provide data.
Further, described particle purifying unit 300 comprises flow-limiting valve 302, impacting type particle cutter 307 and electrostatic fine particle remover 310.
Described flow-limiting valve 302 is provided with primary air inlet 303, auxiliary gas air intake opening 304 and mixed gas outlet 305.Specifically, described primary air inlet 303 is connected with the escape pipe of particle characterisitic parameter measuring unit 200, for realizing the recycling of dry waste gas.Described auxiliary gas air intake opening 304 connects outside dry air source, for carrying out dynamic in real time supplementing when primary air inlet 303 tolerance is not enough.Described mixed gas outlet 305 is connected, for being delivered in impacting type particle cutter 307 by mixed gas with the inlet end accelerating spout.Described flow-limiting valve 302 is also provided with adjusting knob, for controlling the air pressure at mixed gas outlet 305 place.
The shock platform 308 that described impacting type particle cutter 307 comprises cutter cavity, is arranged on the acceleration spout 306 at cutter cavity top and is detachably arranged in cutter cavity inner bottom surface.Described acceleration spout 306 comprises the acceleration jet accelerating shower nozzle and be arranged in the middle of acceleration shower nozzle; Described acceleration jet is inverted cone-shaped, and the acceleration jet of this inverted cone-shaped is the circular hole of 0.6mm bottom.Being set to the hole of the inverted cone-shaped that diameter diminishes successively by will speed up spray orifice, the continuous acceleration of air-flow can be realized.Described shock platform 308 is the right cylinder coaxially arranged with acceleration jet, and described shock platform 308 is threaded in the bottom of cutter inside cavities, clashes into platform 308 and is provided with O RunddichtringO with the junction of cutter cavity.By shock platform 308 being detachably arranged on the bottom of cutter inside cavities, can removing for the particle in later stage and provide convenience.Under constant flow rate, what impacting type particle cutter 307 can realize more than 1 μm bulky grain thing retains removal.
Fig. 2 is the structure principle chart of impacting type particle cutter, the principle of work of conventional inertial impaction formula sampling thief has mainly been used for reference in its design, utilization be inertial separation method, air-flow is through accelerating after shower nozzle, owing to being subject to the stop of clashing into platform, air-flow is rapidly to and around scatters.The particle that in air-flow, particle diameter is less is less due to own momentum, is easy to scatter towards periphery with air-flow; For the particle that particle diameter is larger, due to the momentum that self is larger, even if the effect of power when being subject to air dispersion, but still thoroughly cannot change movement locus, and finally deposit to and clash on platform.
Fig. 2 is impacting type particle diameter cutter structure principle chart, and in figure, W is acceleration jet diameter, and T is acceleration jet height, and S accelerates spout 306 and the vertical range of clashing into platform 308.In actual computation, determine that the parameter of inertial impaction formula particle cutter size grading efficiency is, particle size values corresponding when namely collection efficiency reaches 50%, W=T=S=0.6um is got in design process, at standard conditions, when sweep gas flow is 0.3L/min, be 0.6um, effectively can remove micron-sized bulky grain thing in sweep gas.Meanwhile, when sweep gas air-flow becomes large, faster owing to accelerating rear air-flow velocity, can be less.
Described electrostatic fine particle remover 310 comprises remover cavity, is arranged on the effluve pin 309 at the upper and lower two ends of remover cavity and high pressure extraction electrodes 311, the effluve pin power supply 301 be electrically connected with effluve pin 309 and the high pressure extraction electrodes power supply 313 be electrically connected with high pressure extraction electrodes 311.Described effluve pin 309 is tungsten pin, under effluve pin power supply 301 drives, can produce a large amount of free electron.Described effluve pin power supply 301 adopts negative pressure direct supply, can realize 0 to the continuous adjustment within the scope of negative 5000V.Described high pressure extraction electrodes 313 is the coaxial rod iron arranged with effluve pin 309, and one end of this rod iron is arranged on the bottom of remover cavity, and the other end is semisphere (in FIG, the upper end of high pressure extraction electrodes is semisphere).The tip of effluve pin 309 and the hemispherical ends of high pressure extraction electrodes 313 keep insulating safety distances.By the front end of high pressure extraction electrodes 313 is set to semisphere, the generation of point discharge phenomenon can be avoided.Affiliated high pressure extraction electrodes power supply 313 adopts negative pressure direct supply.The inlet end of described acceleration spout 306 is positioned at the external side of cutter lumen, and outlet side is positioned at cutter inside cavities and is connected with cutter inside cavity.Described cutter cavity is connected on remover cavity wall, and cutter inside cavity is connected with remover inside cavity.Described remover cavity lower end sidewall is provided with clean gas outlet 312, and described clean gas outlet 312 is connected with sweep gas air intake opening 103.Described cutter cavity and remover cavity all adopt alumina based material, and ground connection.Under the prerequisite applying sparking voltage and traction voltage, what electrostatic fine particle remover can realize being low to moderate nano level fine particle retains removal.Concrete removal process is as follows: when effluve pin power supply 301 normally works, effluve pin 309 can produce a large amount of free electrons and be released into surrounding space, form high density electron cloud region, when the sweep gas being loaded with particle is by this region, due to the collision between particle and free electron and electrostatic adsorption, particle can bring negative charge instantaneously.And high pressure extraction electrodes power supply 313 is when normally working, because high pressure extraction electrodes 311 front end is semisphere, only stable electric field region can be produced at its surrounding space, after the particle with electric charge arrives electric field region, under the effect of electric field force, move toward towards electrostatic fine particle remover 310 wall, and be deposited on wall.Experimental analysis shows, after impacting type particle cutter 307 and the purification of electrostatic fine particle remover 310, more than 10nm particle is entirely removed substantially.
Further, described aspiration pump 400 air pump that adopts air-flow velocity controlled.
The invention still further relates to a kind of dehumanization method of Atmospheric particulates dehydrating unit, the method comprises the following steps:
(1) first, sampling air flow is entered by sample gas air intake opening 101 in the sample air dry path in the inner tube 105 of Nafion pipe Dehumidifying element 100.Then, in the flow process in sample air dry path, its water vapor permeable in the sweep gas in the sweep gas path between inner tube 105 and outer tube 106, is completed sampling air flow drying process by sampling air flow; Finally, the sampling air flow after completing dry process flows out to particle characterisitic parameter measuring unit 200 through sample gas gas outlet 102 from Nafion pipe Dehumidifying element 100.In the present invention, described sample gas is sampling air flow.
(2) sampling air flow carried out after dry process through Nafion pipe Dehumidifying element 100 carries out the measurement of particle characterisitic parameter in particle characterisitic parameter measuring unit 200, and flows into particle purifying unit 300 after completing the measurement of particle characterisitic parameter.Gas after measuring through particle characterisitic parameter is recycled as sweep gas, converging into purging air-flow together with secondary air passes into in particle purifying unit 300 in the lump, thus the psychrometric difference strengthened between sweep gas and sample gas, and then the drying efficiency of whole Atmospheric particulates dehydrating unit can be improved.
(3) particle characterisitic parameter measuring unit 200 escape pipe flow out drying process after sampling air flow, flow into flow-limiting valve 302 from primary air inlet 303.Simultaneously for ensureing that sweep gas flow is higher than the flow treating test sample gas, passes into a part of dry air from auxilairy air intake 304 to flow-limiting valve 302.In flow-limiting valve 302, the dry sampling air flow entered from primary air inlet 303 and after mixing from the dry air that auxilairy air intake 304 enters, forms the sweep gas with particle.Sweep gas with particle enters in impacting type particle cutter 307 through mixed gas outlet 305 and acceleration spout 306.After accelerating spout 306, the micron order bulky grain thing in sweep gas is trapped within and clashes in platform 308, and other nanoscale fine particles enter in electrostatic fine particle remover 310 with sweep gas.In electrostatic fine particle remover 310, under the acting in conjunction of effluve pin 309, effluve pin power supply 301, particle in sweep gas completes charged process instantaneously, then under the acting in conjunction of high pressure extraction electrodes 311, high pressure extraction electrodes power supply 313, nano-scale particle thing charged in sweep gas is towed to internal and external electrode surface instantaneously, thus completes the removal of nano-scale particle thing in sweep gas.Thus, with the sweep gas of particle after particle purifying unit, the particle entrained by it is substantially all eliminated, thus can avoid the pollution to Nafion pipe Dehumidifying element 100.Sweep gas after purification enters in Nafion pipe Dehumidifying element 100 through sweep gas air intake opening 103, and be full of in the zone line that inner tube 105 and outer tube 106 form, carry out the moisture absorption process of sampling air flow, then under the effect of aspiration pump, leave Nafion pipe Dehumidifying element 100 by sweep gas gas outlet 104, and discharged by aspiration pump 400.The present invention is by arranging aspiration pump 400, sweep gas air-flow can be made to be greater than and to treat test sample gas, thus within the set time, take away more vapour molecule, and while the introducing of flow-limiting valve 302 tentatively can mix realizing gas, realize valve body rear sweep gas air pressure lower than treating test sample gas, according to nafion pipe principle of work, the introducing of draught head will accelerate the transport velocity of hydrone in Nafion pipe greatly, thus improves the drying efficiency of whole Atmospheric particulates dehydrating unit.
In sum, Atmospheric particulates dehydrating unit of the present invention and method are based on Nafion pipe dehumidification principle, by the method that infrabar high flow rate dry gas purges, remove the steam treated in test sample gas, realize the contactless continuous dehumidifying of free of losses of Atmospheric particulates.For ensureing the cleanliness factor of purge gas, the present invention first adopts the mode of inertial impaction, removes the particle of the particle diameter in purge gas in micron dimension; Field-ionization is charged draw with electrostatic the method removed and combine for recycling, the nano level fine particle of removal purge gas.The method that the present invention also utilizes flow-limiting valve to combine with high-power aspiration pump, realizes purge gas pressure lower than sample gas, thus substantially increases the drying efficiency of whole Atmospheric particulates dehydrating unit.
Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.
Claims (7)
1. an Atmospheric particulates dehydrating unit, is characterized in that: comprise Nafion pipe Dehumidifying element, particle characterisitic parameter measuring unit, particle purifying unit and aspiration pump;
Described Nafion pipe Dehumidifying element comprises outer tube and embeds the inner tube be arranged in the middle of outer tube; Sweep gas path is formed between described outer tube inwall and inner tube outer wall; The two ends up and down of described outer tube sidewall are respectively equipped with the sweep gas gas outlet and sweep gas air intake opening that are connected with sweep gas path, and described sweep gas gas outlet is connected with the air intake opening of aspiration pump; The two ends up and down of described inner tube are respectively equipped with the sample gas air intake opening and sample gas gas outlet that are connected with inner tube inside, and described sample gas air intake opening, inner tube inside and sample gas gas outlet form sample air dry path; Described sample gas gas outlet is connected with the draft tube of particle characterisitic parameter measuring unit;
Described particle purifying unit comprises flow-limiting valve, impacting type particle cutter and electrostatic fine particle remover; Described flow-limiting valve is provided with primary air inlet, auxiliary gas air intake opening and mixed gas outlet; The shock platform that described impacting type particle cutter comprises cutter cavity, is arranged on the acceleration spout at cutter cavity top and is detachably arranged in cutter cavity inner bottom surface; Described electrostatic fine particle remover comprises remover cavity, is arranged on the effluve pin at the upper and lower two ends of remover cavity and high pressure extraction electrodes, the effluve pin power supply be electrically connected with effluve pin and the high pressure extraction electrodes power supply be electrically connected with high pressure extraction electrodes; Described primary air inlet is connected with the escape pipe of particle characterisitic parameter measuring unit; Described auxiliary gas air intake opening connects outside dry air source; Described mixed gas outlet is connected with the inlet end accelerating spout; The inlet end of described acceleration spout is positioned at the external side of cutter lumen, and outlet side is positioned at cutter inside cavities and is connected with cutter inside cavity; Described cutter cavity is connected on remover cavity wall, and cutter inside cavity is connected with remover inside cavity; Described remover cavity lower end sidewall is provided with clean gas outlet, and described clean gas outlet is connected with sweep gas air intake opening.
2. a kind of Atmospheric particulates dehydrating unit according to claim 1, is characterized in that: described particle characterisitic parameter measuring unit adopts particle characterisitic parameter measuring instrument or monitor.
3. a kind of Atmospheric particulates dehydrating unit according to claim 1, is characterized in that: described acceleration spout comprises the acceleration jet accelerating shower nozzle and be arranged in the middle of acceleration shower nozzle, and described acceleration jet is inverted cone-shaped;
Described shock platform is the right cylinder coaxially arranged with acceleration jet, and described shock platform is threaded in the bottom in cutter cavity, and the junction of clashing into platform and cutter cavity is provided with O RunddichtringO.
4. a kind of Atmospheric particulates dehydrating unit according to claim 1, is characterized in that: described effluve pin is tungsten pin, described effluve pin power acquisition direct supply; Described high pressure extraction electrodes is the rod iron arranged with effluve coaxial needle, and one end of this rod iron is arranged on the bottom of remover cavity, and the other end is semisphere.
5. a kind of Atmospheric particulates dehydrating unit according to claim 1, is characterized in that: described cutter cavity and remover cavity all adopt alumina based material.
6. a kind of Atmospheric particulates dehydrating unit according to claim 1, is characterized in that: the air pump that described aspiration pump adopts air-flow velocity controlled.
7. the dehumanization method of a kind of Atmospheric particulates dehydrating unit according to claim 1, is characterized in that: the method comprises the following steps:
(1) first, sampling air flow enters in the sample air dry path in Nafion pipe Dehumidifying element inner tube by sample gas air intake opening; Then, in the flow process in sample air dry path, its water vapor permeable in the sweep gas in the sweep gas path between inner tube and outer tube, is completed sampling air flow drying process by sampling air flow; Finally, the sampling air flow after completing dry process flows out to particle characterisitic parameter measuring unit through sample gas gas outlet from Nafion pipe Dehumidifying element;
(2) sampling air flow carried out after dry process through Nafion pipe Dehumidifying element carries out the measurement of particle characterisitic parameter in particle characterisitic parameter measuring unit, and flows into particle purifying unit after completing the measurement of particle characterisitic parameter;
(3) sampling air flow in particle purifying unit is flowed into, together with the secondary air entered by auxilairy air intake, converge into purging air-flow, impacting type particle cutter is first adopted to retain removal micron order bulky grain thing wherein, electrostatic fine particle remover is adopted to retain removal nanoscale fine particle wherein again, finally the air-flow removing particle is entered in sweep gas path by the sweep gas air intake opening of Nafion pipe Dehumidifying element, carry out sampling air flow moisture absorption process, and discharged by sweep gas gas outlet under the driving of aspiration pump.
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| CN107167402A (en) * | 2016-03-08 | 2017-09-15 | 福特环球技术公司 | The method and system sensed for exhaust particulate matter |
| CN107421023A (en) * | 2017-06-28 | 2017-12-01 | 芜湖市神龙新能源科技有限公司 | A kind of air purifier |
| CN108376001A (en) * | 2018-01-31 | 2018-08-07 | 中国科学院合肥物质科学研究院 | A kind of particulate matter humidity quick control device and its control method |
| CN108760415A (en) * | 2018-08-13 | 2018-11-06 | 北京大学 | More grain size sections automatically switch sampling apparatus for atmospheric particulate matter and the automatic method of sampling |
| CN112797513A (en) * | 2021-01-14 | 2021-05-14 | 常州大学 | Non-equilibrium plasma charge induced condensation dehumidification device and method |
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| CN107167402A (en) * | 2016-03-08 | 2017-09-15 | 福特环球技术公司 | The method and system sensed for exhaust particulate matter |
| CN107036949A (en) * | 2017-05-19 | 2017-08-11 | 武汉四方光电科技有限公司 | Dust concentration detection means and provided with dust concentration detection means air cleaning facility |
| CN107036949B (en) * | 2017-05-19 | 2024-04-26 | 四方光电股份有限公司 | Dust concentration detection device and air purification equipment with same |
| CN107421023A (en) * | 2017-06-28 | 2017-12-01 | 芜湖市神龙新能源科技有限公司 | A kind of air purifier |
| CN108376001A (en) * | 2018-01-31 | 2018-08-07 | 中国科学院合肥物质科学研究院 | A kind of particulate matter humidity quick control device and its control method |
| CN108760415A (en) * | 2018-08-13 | 2018-11-06 | 北京大学 | More grain size sections automatically switch sampling apparatus for atmospheric particulate matter and the automatic method of sampling |
| CN108760415B (en) * | 2018-08-13 | 2023-11-24 | 北京大学 | Multi-particle-size-section automatic switching atmospheric particulate sampling device and automatic sampling method |
| CN112797513A (en) * | 2021-01-14 | 2021-05-14 | 常州大学 | Non-equilibrium plasma charge induced condensation dehumidification device and method |
| CN112797513B (en) * | 2021-01-14 | 2022-03-01 | 常州大学 | Non-equilibrium plasma charge induced condensation dehumidification device and method |
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