CN204073802U - A kind of aerosol is online dehydrating unit continuously - Google Patents
A kind of aerosol is online dehydrating unit continuously Download PDFInfo
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- CN204073802U CN204073802U CN201420548362.XU CN201420548362U CN204073802U CN 204073802 U CN204073802 U CN 204073802U CN 201420548362 U CN201420548362 U CN 201420548362U CN 204073802 U CN204073802 U CN 204073802U
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Abstract
The utility model discloses a kind of aerosol online dehydrating unit continuously, comprise sample gas input pipe, sample gas efferent duct, and the humidity sensor to be connected with sample gas efferent duct, dehydrating unit is connected with between described sample gas input pipe and sample gas efferent duct, described dehydrating unit comprises the dehumidifying sleeve pipe of at least two built-in filled medias of cover and heater, and sample gas enters dehumidifying sleeve pipe by built-in catheter; The two ends of described dehumidifying sleeve pipe are provided with sample gas air inlet pipe, sample gas escape pipe, blowback air air inlet pipe and blowback air escape pipe, sample gas air inlet pipe is connected with sample gas input pipe by the first motor-driven valve, sample gas escape pipe is connected with sample gas efferent duct by the second motor-driven valve, the external air pressure pump of blowback air air inlet pipe, for being blown into gas to dehumidifying sleeve pipe.Feature of the present utility model is less on the impact of particle state, when especially less on the impact of nano-scale particle thing, realize sample gas and dehumidify online continuously, be applicable to the environment that the humidity such as hectic fever weather are larger.
Description
Technical field
The utility model relates to a kind of aerosol online dehydrating unit continuously, is particularly applicable to the aerosol drying equipment paying close attention to nano-scale particle thing on-line monitoring instrument.
Background technology
Atmospheric aerosol is a focus of Study of Atmospheric Environment always, and research shows: aerosol is the main cause causing visibility degeneration, cause region gray haze phenomenon, also can affect health and surface solar radiation.But the delustring attribute of the particle of different size, Radiative Forcing ability and Environmental Health risk exist significant difference, therefore, to atmospheric aerosol Particle density Size distribution study on monitoring and Environmental capacity seem extremely important.
Because particle has hygroscopicity, the physico-chemical property of particle can change along with the humidity of environment and change to a certain degree occur, thus brings error to the measurement of on-line instrument.Such as, particle, particularly can moisture absorption grow up when humidity is larger when in particle, hygroscopic component is many time, the dynamic characteristic of particle can change, greater particle size scope be become originally belonging to compared with the particle measurement of small particle diameter scope, producing error.On the other hand, in hot and humid environment, when aerosol sample enters monitoring equipment indoor transfer pipeline (experiment indoor temperature controls usually below 25 DEG C), condensate moisture in sample gas may be caused to tube wall due to temperature decrease, even arrive monitoring instrument detection module, cause measure error even instrument failure.Therefore, in the process paying close attention to the physico feature measurement of nano-scale particle, the control of humidity seems particularly important.
Existing humidity conditioner can be divided into the devices such as the dehumidifying of heating and dehumidification, partial pressure difference, dehumidification by condensation and the dehumidifying of silica dehydrator pipe principle.Due to heating method set by temperature all higher than environment temperature, will the particle loss of half volatile be caused, thus bring loss error.Nafion film drying device, utilizes the dividing potential drop difference of the water of film both sides to produce pressure differential, makes steam in the gas that measuring moisture in film is higher through film, reaches the effect of dehumidifying; Although this method does not need heating, effect on moisture extraction is vulnerable to the impact of the factors such as ambient temperature, and control unstable, cost is also higher, and has highly acid, can cause the loss of alkali grain thing.Dehumidification by condensation utilizes and cools, and steam is condensed in when dew-point temperature after on wall and extracts out, then be heated to environment temperature to gas circuit, relative humidity significantly declines; The applicability that this method is monitored aerosol quality and concentration is stronger, but less nano-scale particle thing due to diffusivity stronger, easily strike the tube wall that hangs with condensation film and lose, therefore, not being suitable for the on-line monitoring equipment dehumidifying paying close attention to the physico characteristic of nano-scale particle.Silica dehydrator pipe is also Application comparison particle dehydrating unit widely, utilizes the water imbibition of silica gel, and during airflow passes drying tube with particle, steam is to surrounding diffusion by absorbed on silica gel, and particle still enters instrument with air-flow, to reach the effect of dehumidifying; Current business-like silica dehydrator pipe needs to regularly replace silica gel, is not enough to the demand of satisfied continuous on-line monitoring research.
Summary of the invention
For above problem, the purpose of this utility model proposes a kind of utilization can remove aerosol humidity online continuously, and on the aerosol dehydrating unit that particularly impact of nano-scale particle thing is less.
The technical scheme that the utility model adopts: a kind of aerosol is online dehydrating unit continuously, comprise sample gas input pipe, sample gas efferent duct, and the humidity sensor to be connected with sample gas efferent duct, dehydrating unit is connected with between described sample gas input pipe and sample gas efferent duct, described dehydrating unit comprises the dehumidifying sleeve pipe of at least two built-in filled medias of cover and heater, and sample gas enters dehumidifying sleeve pipe by built-in catheter; The two ends of described dehumidifying sleeve pipe are provided with sample gas air inlet pipe, sample gas escape pipe, blowback air air inlet pipe and blowback air escape pipe, sample gas air inlet pipe is connected with sample gas input pipe by the first motor-driven valve, sample gas escape pipe is connected with sample gas efferent duct by the second motor-driven valve, the external air pressure pump of blowback air air inlet pipe, for being blown into gas to dehumidifying sleeve pipe.
Filled media in above-mentioned dehumidifying sleeve pipe is silica gel particle, and described heater is the heating pole be evenly arranged.The built-in catheter of described dehumidifying sleeve pipe is reticulate vessel, and the two ends of conduit are communicated with sample gas air inlet pipe, sample gas escape pipe respectively.
Above-mentioned sample gas input pipe and sample gas efferent duct are Y tube.Wherein, described sample gas input pipe is connected with sampling device by sample letter shoot; The pipeline of described sample gas efferent duct after humidity sensor is divided into two passages by another Y tube, respectively the sample gas after dehumidifying is delivered to the particle monitoring equipment of two different-grain diameter scopes.
The two ends of above-mentioned dehumidifying sleeve pipe are provided with fixed cover.Described dehumidifying sleeve pipe is the cylinder-shaped sleeve of certain length and diameter, annular equidistant configuration some heating poles in each dehumidifying sleeve pipe.Particularly, described dehumidifying sleeve pipe is the cylinder-shaped sleeve of length 50cm, diameter of section 15cm, and annular equidistant configuration six roots of sensation heating pole in each dehumidifying sleeve pipe, heating-up temperature is 70-100 DEG C.
Distinguishing feature of the present utility model is: described aerosol continuously online dehydrating unit less on the impact of particle state, when especially less on the impact of nano-scale particle thing, can realize sample gas and dehumidify online continuously.Efficiently solve the continuous dehumidifying problem paying close attention to the physico characteristic on-line monitoring of nano-scale particle, particularly when hectic fever weather equal relative humidity is larger, there is clear superiority.Equipment, device that this device is used, be easy to processing, install; Operation observing and controlling and data acquisition flow process simply, are convenient to design corresponding computer-controlled program.
Accompanying drawing explanation
Fig. 1 is the structural representation of the continuous online dehydrating unit of aerosol described in the utility model;
Fig. 2 is the structural representation of dehumidifying sleeve pipe described in the utility model;
Fig. 3 is embodiment schematic diagram of the present utility model.
Detailed description of the invention
For realizing above-mentioned target, the utility model takes following technical scheme:
With reference to shown in Fig. 1, the fundamental mode of described aerosol online dehydrating unit is continuously that the two eliminations sleeve pipe that wets is used alternatingly, and is divided into dehumidifying and regeneration two processes to hocket.Be described for left side dehumidifying sleeve pipe 9 below, the structure of right side dehumidifying sleeve pipe 10 is identical with it with workflow.As shown in Figure 2, the fixed cover 99 that dehumidifying sleeve pipe 9 makes outer tube 95 and two ends by insulated heat material is formed, and its sample gas air inlet pipe 91 is connected with the first motor-driven valve 3, and sample gas escape pipe 96 is connected with the second motor-driven valve 4.
In dehumidification process: when utilizing left side dehumidifying sleeve pipe 9 to dehumidify, two motor-driven valves 3,4 in left side are opened, and right side motor-driven valve 5,6 cuts out, and electric T-shaped valve 7,8 closes left channel, opens right channel; Sample gas is through sample gas input pipe (Y tube, make sample gas in flow pipe, avoid right angle and acute angle pipeline, reduce the particle particle loss that especially inertia is larger) the 1, first motor-driven valve 3, dehumidifying sleeve pipe 9, second motor-driven valve 4, sample gas efferent duct (Y tube) 2, humidity sensor 11 to monitoring instrument.In this process, sample gas at the uniform velocity dehumidifying sleeve pipe in pipe 92 (this built-in catheter is designed to netted stainless steel column pipeline, sample gas laminar condition can be kept on the one hand, reduce particle loss, be beneficial to moisture diffusion on the other hand) middle flowing, dehumidifying sleeve pipe 9 in filled media---the moisture in silica gel particle 94 pairs of sample gas absorbs, and the relative humidity in sample gas monitored by humidity sensor 11.When the relative humidity that humidity sensor 11 is monitored reaches the controlled humidity threshold value of setting (as RH=40%), controller will control electric T-shaped valve 7,8 and cut out right channel, open left channel; And right side motor-driven valve 5,6 is opened, left side motor-driven valve 3,4 cuts out, and dehumidification function is switched to right side dehumidifying sleeve pipe 10.
In regenerative process: after dehumidification function switches to right side dehumidifying sleeve pipe 10, dehumidifying sleeve pipe 9 in control left side is started regenerative process (motor-driven valve 3,4 closed condition, electric T-shaped valve 7,8 is left channel state) by controller.Heater is opened, and utilizes heating pole 93 pairs of filled medias---and silica gel particle 94 carries out heating and dehumidification.Simultaneously, air pressure pump 12 is opened, drier purge gas is delivered to left side dehumidifying sleeve pipe 9 through blowback air air inlet pipe 97, discharge from blowback air escape pipe 98 through casing main body, and take away the moisture (blowback air air inlet pipe and escape pipe configure as Fig. 2 Central Symmetry, are conducive to allowing purge gas at utmost circulate in dehumidifying casing main body) evaporated from silica gel particle.Heating-up temperature and heat time can be arranged as required, keep heated condition longer a period of time (as 20 hours).After heating terminates, continue to keep blow-back state a period of time (as 4 hours); Subsequently, air pressure pump 12 is turned off by control relay.So far, the regenerative process of left side dehumidifying sleeve pipe 9 is completed.
Treat that right side dehumidifying sleeve pipe 10 dehumidifying effect consumes substantially, when after dehumidifying, pipeline sample gas relative humidity meets or exceeds and controls threshold value, left side dehumidifying sleeve pipe 9 again can switch and enters dehumidification process and use, and right side dehumidifying sleeve pipe 10 enters regeneration stage.Replace and so forth, aerosol sample gas can be realized and dehumidify online continuously.According to aerosol sample uninterrupted difference, can the quantity of the appropriate design dehumidifying length of sleeve pipe, diameter of section and heating pole, setting different heating temperature and heating duration, to meet continuous high-efficient dehumidification requirements.
Dehydrating unit described in the utility model have employed two cover dehumidifying sleeve pipes, also the quantity of dehumidifying sleeve pipe can be increased as required (as three covers, four covers, even more), controlling unlatching or the closedown of motor-driven valve by arranging many cover controllers, making the alternation of many cover dehumidifying sleeve pipes.Its operation principle is identical with regenerative process alternation principle with above-mentioned dehumidification process, does not repeat them here.
In order to verify technique effect of the present utility model by experiment, be configured with the on-line monitoring equipment measuring 3nm-1 μm of particulate count concentration Size distribution in certain monitoring station, adopt this aerosol online dehydrating unit continuously, it implements schematic diagram as shown in Figure 3.In this example, sample gas input pipe 1 is connected with sampling device 13 by sample letter shoot 14.The pipeline of sample gas efferent duct 2 after humidity sensor 11 is divided into two passages by another Y tube 15, respectively the sample gas after dehumidifying is delivered to the particle monitoring equipment 16,17 of two different-grain diameter scopes, wherein the monitoring particle diameter of particle monitoring equipment 16 is 3-100nm, and the monitoring particle diameter of particle monitoring equipment 17 is 100-1000nm.System gas sol sample gaseous working stream amount is 1.8L/min, and humid control requires as threshold value RH=40%; Dehumidifying casing profile diameter is 15cm, and length is 50cm, and each sleeve pipe annular equidistant configuration heating pole six roots of sensation, heating-up temperature is set as 70-100 DEG C, and the heat time is 20 hours, continues blowback 4 hours after heating stops.When drier, the two switching operating frequencys eradicating wet sleeve pipe are about 4 days; In the season that humidity is higher, switching frequency is about 2 days, and operation conditions is stablized.The Performance comparision of the utility model patent and traditional silica gel dehumidification pipe, has the following advantages:
(1) traditional silica gel dehumidification pipe is not when meeting dehumidification rate, needs artificial replacing silica gel or silicone tube, can interrupt the normal operation of instrument, cause shortage of data.And the automatic immediate adopting the utility model can realize two silicone tubes switches, while guarantee dehumidification rate, at utmost reduce because instrument state changes the shortage of data caused.
(2) traditional silicon rubber tube system does not generally configure humidity control device, and the main human eye that relies on judges its effect on moisture extraction according to the color change of silica gel, and on the one hand, naked eyes judge subjective, easily there is deviation; On the other hand, night relative humidity is higher, when silicone tube dehumidification rate drops to and can not meet effect on moisture extraction requirement, is difficult to Timeliness coverage, namely may has institute delayed.And the utility model has installed humidity sensor and feedback control system thereof, according to the threshold value of setting, silica gel dehumidification pipe can be completed immediately, quickly and accurately and replaced, and automatically carried out the regeneration of low usefulness silicone tube.
Claims (9)
1. an aerosol online dehydrating unit continuously, comprise sample gas input pipe, sample gas efferent duct, and the humidity sensor to be connected with sample gas efferent duct, it is characterized in that, dehydrating unit is connected with between described sample gas input pipe and sample gas efferent duct, described dehydrating unit comprises the dehumidifying sleeve pipe of at least two built-in filled medias of cover and heater, and sample gas enters dehumidifying sleeve pipe by built-in catheter; The two ends of described dehumidifying sleeve pipe are provided with sample gas air inlet pipe, sample gas escape pipe, blowback air air inlet pipe and blowback air escape pipe, sample gas air inlet pipe is connected with sample gas input pipe by the first motor-driven valve, sample gas escape pipe is connected with sample gas efferent duct by the second motor-driven valve, the external air pressure pump of blowback air air inlet pipe, for being blown into gas to dehumidifying sleeve pipe.
2. aerosol continuously online dehydrating unit according to claim 1, it is characterized in that, the filled media in described dehumidifying sleeve pipe is silica gel particle, and described heater is the heating pole be evenly arranged.
3. aerosol online dehydrating unit continuously according to claim 1 or 2, it is characterized in that, the built-in catheter of described dehumidifying sleeve pipe is reticulate vessel, and the two ends of conduit are communicated with sample gas air inlet pipe, sample gas escape pipe respectively.
4. aerosol continuously online dehydrating unit according to claim 1, it is characterized in that, described sample gas input pipe and sample gas efferent duct are Y tube.
5. aerosol continuously online dehydrating unit according to claim 4, it is characterized in that, described sample gas input pipe is connected with sampling device by sample letter shoot.
6. aerosol continuously online dehydrating unit according to claim 4, it is characterized in that, the pipeline of described sample gas efferent duct after humidity sensor is divided into two passages by another Y tube, respectively the sample gas after dehumidifying is delivered to the particle monitoring equipment of two different-grain diameter scopes.
7. aerosol continuously online dehydrating unit according to claim 1, it is characterized in that, the two ends of described dehumidifying sleeve pipe are provided with fixed cover.
8. aerosol continuously online dehydrating unit according to claim 7, it is characterized in that, described dehumidifying sleeve pipe is the cylinder-shaped sleeve of certain length and diameter, annular equidistant configuration some heating poles in each dehumidifying sleeve pipe.
9. aerosol continuously online dehydrating unit according to claim 8, it is characterized in that, described dehumidifying sleeve pipe is the cylinder-shaped sleeve of length 50cm, diameter of section 15cm, annular equidistant configuration six roots of sensation heating pole in each dehumidifying sleeve pipe, heating-up temperature is 70-100 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420548362.XU CN204073802U (en) | 2014-09-23 | 2014-09-23 | A kind of aerosol is online dehydrating unit continuously |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420548362.XU CN204073802U (en) | 2014-09-23 | 2014-09-23 | A kind of aerosol is online dehydrating unit continuously |
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| CN204073802U true CN204073802U (en) | 2015-01-07 |
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| CN201420548362.XU Expired - Fee Related CN204073802U (en) | 2014-09-23 | 2014-09-23 | A kind of aerosol is online dehydrating unit continuously |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104258693A (en) * | 2014-09-23 | 2015-01-07 | 广东省环境监测中心 | Continuous online dehumidification device for aerosol |
| CN106872219A (en) * | 2015-12-10 | 2017-06-20 | 中国科学院大连化学物理研究所 | Flue gas sampling it is online can in-situ regeneration gas-drying apparatus and application method |
| CN110177476A (en) * | 2016-11-18 | 2019-08-27 | 莱战略控股公司 | Humidity Sensing for Aerosol Delivery Devices |
| EP3647762A1 (en) * | 2018-10-31 | 2020-05-06 | HCTM Co., Ltd. | Particle measuring system |
-
2014
- 2014-09-23 CN CN201420548362.XU patent/CN204073802U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104258693A (en) * | 2014-09-23 | 2015-01-07 | 广东省环境监测中心 | Continuous online dehumidification device for aerosol |
| CN106872219A (en) * | 2015-12-10 | 2017-06-20 | 中国科学院大连化学物理研究所 | Flue gas sampling it is online can in-situ regeneration gas-drying apparatus and application method |
| CN110177476A (en) * | 2016-11-18 | 2019-08-27 | 莱战略控股公司 | Humidity Sensing for Aerosol Delivery Devices |
| CN110177476B (en) * | 2016-11-18 | 2022-10-21 | 莱战略控股公司 | Humidity sensing for aerosol delivery devices |
| EP3647762A1 (en) * | 2018-10-31 | 2020-05-06 | HCTM Co., Ltd. | Particle measuring system |
| CN111122278A (en) * | 2018-10-31 | 2020-05-08 | 株式会社Hctm | Particle measurement system |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150107 Termination date: 20170923 |