CN208443679U - A kind of smoke particle object sampling structure - Google Patents

A kind of smoke particle object sampling structure Download PDF

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Publication number
CN208443679U
CN208443679U CN201821201113.8U CN201821201113U CN208443679U CN 208443679 U CN208443679 U CN 208443679U CN 201821201113 U CN201821201113 U CN 201821201113U CN 208443679 U CN208443679 U CN 208443679U
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CN
China
Prior art keywords
sampling
shield
collet
particle object
smoke particle
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Expired - Fee Related
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CN201821201113.8U
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Chinese (zh)
Inventor
周志华
刘德全
萨如拉
成军旗
刘展华
杨立君
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SHENZHEN ENVIRONMENTAL MONITORING CENTER
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SHENZHEN ENVIRONMENTAL MONITORING CENTER
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Priority to CN201821201113.8U priority Critical patent/CN208443679U/en
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Publication of CN208443679U publication Critical patent/CN208443679U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model relates to a kind of smoke particle object sampling structures, and including the sampling shield being detachably connected and collet, the sampling shield is connected with sampling mouth far from the side of the collet;It further include the first sealing ring, filter membrane, support net and the second sealing ring being successively connected between the sampling shield and collet;The diameter of the filter membraneWherein, J is diffusion flux, and s is the filter membrane close to the side and the side the distance between of the sampling mouth far from sampling shield of sampling shield, and v is the flow velocity of oil smoke.The smoke particle object sampling structure of the utility model, can reduce the weight of the interception carrier of smoke particle object, to reduce the of poor quality of the great disparity between the carrier and smoke particle object.

Description

A kind of smoke particle object sampling structure
Technical field
The utility model relates to atmosphere environment supervision technical fields, and in particular to a kind of smoke particle object sampling structure.
Background technique
After reform and opening-up, China's economy is rapidly developed, and living standards of the people are continuously improved, and drives the hair of the catering trade Exhibition.This year is 40 anniversary of China's reform, and Chinese catering industry is from when striding into 4 trillion yuan for 54.8 hundred million yuan of Initial stages for reform and opening-up Generation, amplification are more than 700 times.It manages dot number and increases 39 times, number of employees also increases nearly 30 times.Data statistics, China Catering trade continued the situation for getting warm again after a cold spell and becoming better in last year, and food and drink income total scale accounts for the total retail sales of consumer goods 10.7%, pulls Consumption market increases by 1.2%.
Along with the development of the catering trade, brings fume pollution and the problem that disturbs residents, cooking fume pollution sources have become only Inferior to the third-largest air pollution source after industrial pollution source and transportation source.Cooking fume refers to edible oil in culinary art, processing Grease, organic matter and its heat resolve goods pyrolysis product to volatilize in the process, complicated component (is mainly shown as mist of oil state), right There is harm in human health.
The law for fume pollution that China is put into effect earliest is " People's Republic of China's prevention and control of air pollution in 2000 Method ", according to this law, former State Environmental Protection Administration implements " cooking fume discharge standard (tentative) " on July 1st, 2000 (GB18483-2001), this is the standard of a mandatory execution, it is specified that existing catering enterprise's unit of completed region of the city, new Cooking fume control equipment must be installed and reach defined purification efficiency and concentration of emission limit value by setting up catering enterprise's unit.2000 October, former State Environmental Protection Administration have issued again " about the notice for reinforcing cooking fume prevention and cure of pollution supervision and management ", It asks competent administrative department for environmental protection of people's governments at all levels to reinforce the supervision and management prevented and treated diet service trade fume pollution, will drink The range of mandatory administration is included in food service trade.
Implementation, the supervision and management of above-mentioned a series of oil smoke processing laws and regulations rely on the detection of oil smoke, existing oil There are commonly " metal filter cylinders absorb and the sampling and analysis method of Infrared Spectralcolorimetry Detect Oil cigarette " for cigarette detection method (GB18483-2001), it is the gas extracted with isokinetic sampling's method in oil smoke exhaust tube, oil smoke is intercepted in oil fume acquisition head, The acquisition filter core for having collected oil smoke is placed in polytetrafluoroethylene sleeve with cover, takes back and makees solvent with carbon tetrachloride behind laboratory It is cleaned by ultrasonic, constant volume in colorimetric cylinder is moved into, with the content of Infrared Spectralcolorimetry Detect Oil cigarette.
Oil smoke discharge properties study and actually detected data are shown for many years: in addition to barbecue, either with particulate matter Concept describes still to describe with the concept of mist of oil, and the mass concentration of the two discharge is suitable, do not have multiple difference.Based on me State improves the needs of atmosphere quality and the trend of particulate matter total amount emission reduction at this stage, proposes the concept of smoke particle object, The concentration of emission of the oil smoke of the catering trade, the provincial standard DB11/ of existing Beijing are characterized by detection smoke particle object T1485-2017 " the measurement craft weight method of catering trade particulate matter " is the method for uniquely surveying smoke particle object with gravimetric method, is adopted With the mode filtered in flue, removed according to particulate matter isokinetic sampling's principle using the particulate matter in filter core acquisition food and drink exhaust After moisture (Free water), by the of poor quality divided by dry sampling volume is marked of sampling front and back filter core, the mass concentration of particulate matter is calculated.
As the Chinese utility model patent that notification number is CN204718913U discloses a kind of particle concentration free of cleaning Above-mentioned manual weight method measurement oil smoke discharge concentration can be thus achieved in sampling apparatus and sample devices, disclosed technical solution, In its measurement process, the filter cartridge construction entirety (together with sampling mouth and filter case) for being equipped with filter membrane is needed to weigh, The equipment of weighing is the assay balance that indexing is 0.01mg, and the structure minimum of Filter overall also wants 15 grams of (embodiments of patent Data disclosed in part), and the smoke particle object of filter core absorption is then generally at 0.08~0.4mg grades in conventional detection process Not, Filter overall differs 4~5 orders of magnitude with object to be measured, is equivalent to using the cup of a 1g and weighs 0.01~0.1mg Object to be measured quality, the quality of object to be measured is calculated by the difference of empty cup and the quality for the cup for loading onto object to be measured, And it measures the of poor quality of the great disparity between carrier and smoke particle object and brings maximum error to detection, and this method exists such as Lower problem needs: needing the weight gain for meeting (1) sample filter core that should be not less than 1.0mg;(2) whole blank filter core before sampling after quality it Difference should be no more than 0.5mg, and otherwise the batch detection data is invalid, and the validity of this method and accuracy is caused to be restricted.
Utility model content
For the defects in the prior art, the utility model provides a kind of smoke particle object sampling structure, to reduce oil smoke The quality of the interception carrier of particulate matter improves detection to reduce the of poor quality of the great disparity between the carrier and smoke particle object Validity and accuracy.
In order to solve the above technical problems, the utility model provides a kind of smoke particle object sampling structure, including detachable The sampling shield and collet of connection, the sampling shield are connected with sampling mouth far from the side of the collet;It further include successively blocking Connect the first sealing ring, filter membrane, support net and the second sealing ring between the sampling shield and collet;The diameter of the filter membraneWherein, J is diffusion flux, and s is that the filter membrane is adopted close to the side of sampling shield with described Side the distance between of the sample mouth far from sampling shield, v are the flow velocity of oil smoke.
When the utility model is used, the sampled mouth of oil smoke enters inside sampling structure, then it is intercepted on filter membrane, When measuring the quality of smoke particle object, it is only necessary to filter membrane is dried at room temperature for 12 hours, then to the used filter membrane into Row weighing, obtains quality W1, W1-W2 is the quality of smoke particle object, wherein W2 is the quality of the not used filter membrane of blank; Again by the quality of obtained smoke particle object divided by the concentration of emission of the volume both available smoke particle object of oil smoke;According to big The quantization dispersal behavior of Fei Shi law in gas pollutant dispersion model, and proposed in conjunction with Arthus Fick in 1855 Macroscopical Diffusion Law-Fick's law: it is as follows by the mass diffusion rate equation in three directions in unit volume:
In formula, D is molecular mass diffusion coefficient,It is concentration gradient, above-mentioned calculating It is calculated with the emission limit 2mg/L of smoke particle object, sampling volume about 200L, diffusion flux value range J=0.7~ 1.1m2/s;The flow velocity of smoke particle object is the v (oil according to the design specification of oil extraction chimney, in oil extraction chimney in mist extractor chimney The flow velocity of cigarette is almost the same), sampling in shield along the distance between the sampling mouth of its axis direction and filter membrane is s, i.e. oil smoke cigarette The distance that gas not yet touches filter membrane in sampling structure is s, then oil smoke runing time t=s/v, available oil smoke The size of grain object range of scatter is Jt, and correspondingly, the diameter that can converse the range of scatter of smoke particle object isIt need to only guarantee that the diameter of filter membrane can cover the range of scatter of smoke particle object, in order to further Ensure that smoke particle object can be intercepted by filter membrane entirely, the diameter of filter membrane is designed as by the utility modelWherein, when calculating, its maximum value can be taken in the value range of J.It can be seen that this reality Smoke particle object can be intercepted on filter membrane with novel smoke particle object sampling structure completely, in weighing, only need to weigh Used filter membrane, and the weight of blank filter membrane is about 0.15g, and 2 orders of magnitude of the Mass lost of traditional filter core, significantly The difference of its quality between smoke particle object is reduced, more accurate measurement can be carried out to smoke particle object.
Preferably, it is threadedly coupled between sampling shield and the collet.
Preferably, the sampling shield is equipped with the first groove of annular, the first sealing ring card close to the side of collet It connects in first groove, the collet is equipped with the second groove of annular, second sealing ring close to the side of sampling shield It is connected in second groove, and the sampling shield, the first sealing ring, filter membrane, support net, the second sealing ring and collet are successively It fits closely.
Preferably, the support net is stainless steel material.
Preferably, the periphery of the collet is equipped with external screw thread, and the inner circumferential of the sampling shield is provided with and the external screw thread The internal screw thread of adaptation can be pasted closely with ensuring to sample shield, the first sealing ring, filter membrane, support net, the second sealing ring and collet It closes, while the cooperation of internal and external threads, the periphery of collet can be made to be coated on the inner circumferential of sampling shield, so as to effectively prevent Oil smoke leaks.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described.In all the appended drawings, similar Element or part are generally identified by similar appended drawing reference.In attached drawing, each element or part might not be according to actual ratios It draws.
Fig. 1 is the structural schematic diagram of the smoke particle object sampling structure of the utility model embodiment;
Fig. 2 is the structural schematic diagram of the sampling shield of the utility model embodiment;
Fig. 3 is the structural schematic diagram of the collet of the utility model embodiment.
Appended drawing reference:
1- samples shield;2- collet;3- samples mouth;The first sealing ring of 4-;5- filter membrane;6- support net;The second sealing ring of 7-;
The first groove of 11-;The second groove of 21-.
Specific embodiment
It is described in detail below in conjunction with embodiment of the attached drawing to technical solutions of the utility model.Following embodiment is only For clearly illustrating the technical solution of the utility model, therefore it is only used as example, and it is originally practical to cannot be used as a limitation limitation Novel protection scope.
As shown in Figure 1, Figure 2 and Figure 3, the smoke particle object sampling structure of the present embodiment includes the sampling shield being detachably connected Cover 1 and collet 2, sampling shield 1 are connected with sampling mouth 3 far from the side of collet 2;It further include successively being connected to sampling 1 He of shield The first sealing ring 4, filter membrane 5, support net 6 and the second sealing ring 7 between collet 2.
In the present embodiment, above-mentioned sampling mouth 3 is identical as the sampling mouth structure in traditional sampling structure, does not do herein superfluous It states, specifically can sample mouth structure with reference to disclosed in the Chinese utility model patent that notification number is CN204718913U.
The present embodiment simplifies the filter cartridge construction in traditional sampling structure, to reduce for weighing check weighing Carrier quality, reduce weighing carrier and smoke particle object between it is of poor quality, specifically, the present embodiment only needs to block Cutting has the independent net weight weighed and subtract filter membrane 5 of the filter membrane 5 of smoke particle object to can be obtained the quality of smoke particle object, thus To the concentration of oil smoke.
Further, in order to guarantee that smoke particle object is all intercepted on filter membrane 5, the diameter of filter membrane 5 in the present embodiment It need to be designed according to following formula,Wherein, J is diffusion flux, and s is that filter membrane 5 is close The distance between the side of side and sampling mouth 3 far from sampling shield 1 of shield 1 is sampled, v is the flow velocity of oil smoke;Specifically, on It states calculating to be calculated with the emission limit 2mg/L of smoke particle object, sampling volume about 200L, diffusion flux value range J= 0.7~1.1m2/ s, s=10mm, v=10m/s, then the diameter of the filter membrane 5 in the present embodiment is 45~56mm, in the present embodiment, The weight of filter membrane 5 is 150mg ± 10mg, and material can be polytetrafluoroethylene (PTFE), polyvinyl chloride, polypropylene, cellulose mixture etc., is filtered Membrane aperture is less than or equal to 2 μm.
Specifically, to be threadedly coupled between above-mentioned sampling shield 1 and collet 2, external screw thread (figure is equipped in the periphery of collet 2 In be not shown), sampling shield 1 inner circumferential be provided with the internal screw thread (not shown) being adapted to the external screw thread, can in Fig. 1 To find out, sampling shield 1 and collet 2 includes conical section and cylindrical portion, and the screw thread setting unit of the two is in respective cylindricality Duan Shang.
Specifically, above-mentioned sampling shield 1 is equipped with the first groove 11 of annular close to the side of collet 2, and collet 2 is close to sampling The side of shield 1 is equipped with the second groove 21 of annular, and above-mentioned first sealing ring 4 is connected in the first groove 11, the second sealing ring 7 It is connected in the second groove 21, and after sampling shield 1 is threadedly coupled with collet 2, samples shield 1, the first sealing ring 4, filter membrane 5, support net 6, the second sealing ring 7 and collet 2 successively fit closely, and wherein support net 6 is stainless steel material, the first sealing ring 4 It is rubber material with the second sealing ring 7.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations; Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: It can still modify to technical solution documented by previous embodiment, or to some or all of the technical features It is equivalently replaced;And these are modified or replaceed, the utility model embodiment that it does not separate the essence of the corresponding technical solution The range of technical solution should all cover in the claim of the utility model and the range of specification.

Claims (5)

1. a kind of smoke particle object sampling structure characterized by comprising
The sampling shield and collet being detachably connected, the sampling shield are connected with sampling mouth far from the side of the collet;
It further include the first sealing ring being successively connected between the sampling shield and collet, filter membrane, support net and the second sealing Circle;
The diameter of the filter membraneWherein, J is diffusion flux, and s is the filter membrane close to sampling The side of shield and the side the distance between of the sampling mouth far from sampling shield, v are the flow velocity of oil smoke.
2. a kind of smoke particle object sampling structure according to claim 1, it is characterised in that:
It is threadedly coupled between sampling shield and the collet.
3. a kind of smoke particle object sampling structure according to claim 1, it is characterised in that:
The sampling shield is equipped with the first groove of annular close to the side of collet, and it is first recessed that first sealing ring is connected to this In slot, the collet close to sampling shield side be equipped with annular the second groove, second sealing ring be connected to this second In groove, and the sampling shield, the first sealing ring, filter membrane, support net, the second sealing ring and collet successively fit closely.
4. a kind of smoke particle object sampling structure according to claim 1, it is characterised in that:
The support net is stainless steel material.
5. a kind of smoke particle object sampling structure according to claim 3, it is characterised in that:
The periphery of the collet is equipped with external screw thread, and the inner circumferential of the sampling shield is provided with the interior spiral shell being adapted to the external screw thread Line.
CN201821201113.8U 2018-07-26 2018-07-26 A kind of smoke particle object sampling structure Expired - Fee Related CN208443679U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821201113.8U CN208443679U (en) 2018-07-26 2018-07-26 A kind of smoke particle object sampling structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821201113.8U CN208443679U (en) 2018-07-26 2018-07-26 A kind of smoke particle object sampling structure

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Publication Number Publication Date
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110514486A (en) * 2019-07-24 2019-11-29 中国农业大学 A kind of portable pollen and fungal spore sampler
CN112168689A (en) * 2020-10-19 2021-01-05 杭州哈慈实业有限公司 Five-element needle convenient for replacing clamping rings with different sizes
CN113495019A (en) * 2021-07-16 2021-10-12 北京市劳动保护科学研究所 Sampling device, equipment and method for smoke particles of civil stove

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110514486A (en) * 2019-07-24 2019-11-29 中国农业大学 A kind of portable pollen and fungal spore sampler
CN110514486B (en) * 2019-07-24 2020-11-06 中国农业大学 Portable pollen and fungal spore sampler
CN112168689A (en) * 2020-10-19 2021-01-05 杭州哈慈实业有限公司 Five-element needle convenient for replacing clamping rings with different sizes
CN113495019A (en) * 2021-07-16 2021-10-12 北京市劳动保护科学研究所 Sampling device, equipment and method for smoke particles of civil stove

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20190129

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