CN108414386A - The sample devices of particle concentration free of cleaning - Google Patents

The sample devices of particle concentration free of cleaning Download PDF

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Publication number
CN108414386A
CN108414386A CN201810154879.3A CN201810154879A CN108414386A CN 108414386 A CN108414386 A CN 108414386A CN 201810154879 A CN201810154879 A CN 201810154879A CN 108414386 A CN108414386 A CN 108414386A
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shell
sampling
membrane structure
particle concentration
membrane
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CN108414386B (en
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石爱军
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Beijing Municipal Research Institute of Environmental Protection
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Beijing Municipal Research Institute of Environmental Protection
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Abstract

The present invention relates to particle sampling technical field in kitchen fumes class exhaust gas more particularly to a kind of sample devices of particle concentration free of cleaning.The sample devices of the particle concentration free of cleaning includes sampling apparatus and sampling gun, the outlet of the sampling gun interface connection sampling apparatus of sampling gun;Sampling apparatus includes first half-shell, the second half-shell and fume filtering element;Fume filtering element is located in the cavity that first half-shell is formed with the second half-shell;Fume filtering element includes the first membrane structure and the second membrane structure;In first half-shell, outlet is arranged in the second half-shell for the entrance setting of sampling apparatus;First membrane structure includes polypropylene fibre filter membrane or polytetrafluoroethylene film;Second membrane structure includes glass fiber filter.The purpose of the present invention is to provide the sample devices of particle concentration free of cleaning, have many advantages, such as it is free of cleaning, easy use, be easy to operate, and to the sampling of the particle concentration of oil smoke class, test more science and accurate.

Description

The sample devices of particle concentration free of cleaning
Technical field
The present invention relates to particle sampling technical field in kitchen fumes class exhaust gas more particularly to a kind of particulate matters free of cleaning The sample devices of concentration.
Background technology
Kitchen fumes refer to the grease to volatilize in food cooking, process, organic matter and its heat resolve or cracking production Object.Kitchen fumes are a kind of mixture being made of with air 3 kinds of gaseous state, liquid and solid-state form particulate matters, wherein most Particulate matter be mist of oil, water mist formed high viscosity particulate matter, fraction is solid particulate matter;In kitchen fumes it is main it is organic at It is aldehyde, ketone, hydrocarbon, aliphatic acid, alcohol, aromatic compound, lactone, heterocyclic compound etc. to divide.Liquid, the grain size of solid phase particles object are general 10 μm of <;Gaseous parts are then used as volatile organic matter (VOCs) to discharge, more kinds of detectable VOCs300.Kitchen fumes are more Belong to low-altitude discharged, more to the contribution of the Atmospheric particulates such as PM2.5, oil smoke discharge latter aspect can be formed directly in PM2.5, separately On the one hand complicated photochemical reaction can occur in air for the VOCs of discharge, can also form PM2.5 and O3 pollutions.
With the development of social economy and the raising of the income of residents, big cafeteria is in full flourish in each city, convenient While people's life, fume pollution also brings new problem to urban environment.At present in Surveying of Urban Air Pollution Sources, food and drink Fume pollution and industrial pollution and automobile exhaust pollution become main pollution sources together.Food and drink in The Surroundings in Cities pollution complaint The complaint of service rows industry fume pollution accounts for 50% or so of total complaint amount.What Chinese Ministry of Environmental Protection announced a few days ago《Surrounding air fine particle Pollution prevention technique policy》(exposure draft) it is also proposed that, by control food and drink pollution with reduce PM2.5 discharge.
China continues to use always publication in 2001 at present《Cooking fume discharge standard》(GB18483-2001), standard In define catering trade unit oil smoke highest allow concentration of emission be 2.0mg/m3, but there is no regulation particulate matter and VOCs Emission limit;And the analysis absorbed using metal filter cylinders with Infrared Spectralcolorimetry Detect Oil smoke density is defined in a standard Method.This method extracts the gas in oil smoke exhaust tube using isokinetic sampling's method, and oil smoke is adsorbed in oil fume metal filter cylinders; The acquisition filter core for having collected oil smoke is placed in polytetrafluoroethylene sleeve with cover, return laboratory after with carbon tetrachloride make solvent into Row is cleaned by ultrasonic, and constant volume in colorimetric cylinder is moved into, with the content of Infrared Spectralcolorimetry Detect Oil cigarette.The standard sample and analysis side Method has following technical disadvantages:(1) metal filter cylinders used in oil smoke detection are both needed to clean after testing every time, and cleaning operation is complicated And consume the chemical reagent such as a large amount of carbon tetrachloride;(2) sampling time and sampling working condition requirement are high, some small-sized food and drink are difficult to meet The requirement;(3) infrared spectrophotometer is based on measuring the absorbance at CH, CH2, CH3 key band, and test object is not Comprehensively, representative poor;(4) test operation is complicated, heavy workload.
Particulate matter and the emission limit of VOCs have been adjusted and have increased in some areas catering trade discharge standard, but it is existing 's《Particulate matter measures and the gaseous pollutant method of sampling in Concentration in Fixed Pollutants Source》(GB/T16157-1996) and it is not suitable for meal The detection of the particle concentration of oil smoke class is drunk, main cause is as follows:(1) it is high to be only applicable to particulate matter quality concentration for the test method In 50mg/m3, measure and be less than 50mg/m3Particulate matter when error it is larger;(2) test method is filtered using glass fiber filter cylinder Particulate matter, glass fiber filter cylinder lipophile is poor, and oil smoke class organic particulate matter bearing capacity ability is low, easily penetrates;(3) glass fibre Filter cylinder complex contour needs to carry out the components such as sampling mouth, preceding bend pipe, sampling pipe main body after each sampling complicated, difficulty clear Operation is washed, and cleaning needs to consume the chemical reagent such as acetone, carbon tetrachloride;(4) because the operations such as food-steaming make in kitchen fumes Its humidity is larger, and glass fiber filter cylinder is influenced by oil smoke high humility, and strength reduction is apparent, and tweezers gripping filter is used after sampling It when cylinder, easily causes filter cylinder and is crushed, cause test error, operating personnel's technology is required high.
To sum up, existing test method is not suitable for kitchen fumes class high viscosity, the particle concentration based on organic matter Detection, sampling apparatus manually cleans the problems such as difficult, largely inaccurate using chemical reagent and test.
Therefore, it is badly in need of providing a kind of sample devices of new particle concentration free of cleaning regarding to the issue above.
Invention content
The purpose of the present invention is to provide the sample devices of particle concentration free of cleaning, have free of cleaning, easy use, operation The advantages that easy, and to the sampling of the particle concentration of oil smoke class, test more science and accurate.
Based on above-mentioned purpose, the sample devices of particle concentration free of cleaning provided by the invention, including sampling apparatus and adopt Sample rifle, the sampling gun interface of the sampling gun connect the outlet of the sampling apparatus;
The sampling apparatus includes first half-shell, the second half-shell and fume filtering element;The fume filtering element is located at described first In the cavity that half-shell is formed with second half-shell;
The fume filtering element includes the first membrane structure and the second membrane structure;
In the first half-shell, outlet is arranged in second half-shell for the entrance setting of the sampling apparatus;Along institute The direction for stating entrance to the outlet is followed successively by the first half-shell, first membrane structure, second membrane structure and described Second half-shell;
First membrane structure includes polypropylene fibre filter membrane or polytetrafluoroethylene film;Second membrane structure includes glass Glass fibrous filter membrane.
Optionally, the sampling gun includes temperature sensor, and the temperature sensor is adopted for incuding the sampling apparatus The temperature of sample gas.
Optionally, the sampling gun further includes pitot tube anemometer, and the pitot tube anemometer is for measuring the sampling The flow velocity of device sample gas;
The sampling gun further includes controller, the controller and the temperature sensor, pitot tube anemometer electricity Connection, for receiving information and being shown in the display screen of the controller.
Optionally, the sampling apparatus further includes oil smoke protecting film;The oil smoke protecting film is set to the first half-shell Periphery.
Optionally, the fume filtering element includes sampling pipe and filter core cover, and the sampling pipe is connect with the filter core cover, described The inner cavity of sampling pipe is connected to the inner cavity of the filter core cover;
First membrane structure and second membrane structure are located inside the filter core cover;The first membrane structure phase For second membrane structure, close to the sampling pipe;
The sampling pipe stretches out the first half-shell.
Optionally, first membrane structure further includes isolation supporting network;Relative to the polypropylene fibre filter membrane or institute Polytetrafluoroethylene film is stated, the isolation supporting network is close to second membrane structure.
Optionally, second membrane structure further includes filter membrane protecting wire net;Relative to the glass fiber filter, the filter membrane shield Net is far from first membrane structure.
Optionally, the first half-shell includes gland and first shell;
The first shell is between the gland and second half-shell, the first shell and second half-shell Form the cavity;
The gland is detachably connected with second half-shell.
Optionally, the first sealing ring is provided between the gland and the first shell;The filter core cover and described the The second sealing ring is provided between two half-shells.
Optionally, pillar is provided with outside the first shell, the pillar stretches out the gland, the shape of the pillar It is adapted with the shape of the sampling pipe;
The sampling pipe is inserted into and stretches out the pillar, and the outer wall of the sampling pipe and the inner wall sealing of the pillar connect It touches.
Beneficial effects of the present invention:
The sample devices of particle concentration free of cleaning provided by the invention, including sampling apparatus and sampling gun,;By removable The sampling apparatus unloaded carries out the sampling of particulate matter;The sampling apparatus protects institute using the first half-shell and second half-shell Fume filtering element is stated, influence of the flow velocity of oil smoke to the fume filtering element testing result is reduced;The sampling apparatus is using double-deck Membrane structure realizes effective detection of kitchen fumes class high viscosity, particle concentration based on organic matter, and test structure is accurate It is really reliable;Specifically, first membrane structure includes polypropylene fibre filter membrane or polytetrafluoroethylene film, for filtering, inhaling The liquid oils in oil smoke, the ultra-fine fiber construction using the filter membrane of first membrane structure and good hydrophobic oleophilic oil are received, Oil mass can be quickly absorbed, up to the oil mass of 6-20 times of weight itself;Second membrane structure includes glass fiber filter, is had Good hydrophobicity, other particulate matters being used in filtering fume;First membrane structure and second membrane structure are in material The interference of the water in the particulate matter of kitchen fumes is greatly reduced in selection;First membrane structure and second membrane structure point Wei Yu not be in the fume filtering element, by replacing the disposable fume filtering element, avoiding the sampling apparatus, manually cleaning is tired Difficult problem, the problem of also avoiding that toxic reagent need to be used due to cleaning, simple to operate, at low cost, testing procedure It is simple with process;Particulate matter passes through first membrane structure, second membrane structure successively, will be eaten using the double-deck membrane filtration pattern The particulate matter of oil smoke class collects on the filter membrane of first membrane structure and on the filter membrane of second membrane structure in drink exhaust gas, leads to It crosses whole weight method and measures weight before and after the fume filtering element detection particulate matter, the concentration of particulate matter is calculated according to weight difference, Both reduce laboratory to the measuring fixed amount of cleaning solution, drying and weighing operation, and also save a large amount of analysis workload so that Particle concentration test is simple and practicable, greatly improves work efficiency.To sum up, which filters by using disposable oil smoke Core so that detect oil smoke class particle concentration when have it is free of cleaning, it is easy use, easy to operate, test result is more accurate The features such as.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in being described below Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor It puts, other drawings may also be obtained based on these drawings.
Fig. 1 is the structural schematic diagram of the sampling apparatus of particle concentration free of cleaning provided by Embodiment 2 of the present invention;
Fig. 2 is the structural exploded view of the sampling apparatus of particle concentration free of cleaning provided by Embodiment 2 of the present invention;
Fig. 3 is the structural schematic diagram of the sample devices for the particle concentration free of cleaning that the embodiment of the present invention three provides;
Fig. 4 is the partial enlarged view of the sample devices of particle concentration free of cleaning shown in Fig. 3.
Reference numeral:
1- first half-shells;11- glands;12- first shells;
121- pillars;The second half-shells of 2-;
3- fume filtering elements;The first membrane structures of 31-;Supporting network is isolated in 311-;
The second membrane structures of 32-;321- filter membrane protecting wire nets;33- sampling pipes;
34- filter core covers;4- entrances;5- is exported;
6- oil smoke protecting films;The first sealing rings of 7-;The second sealing rings of 8-;
9- sampling guns;91- sampling apparatuses;92- temperature sensors;
93- pitot tube anemometers;94- controllers.
Specific implementation mode
Technical scheme of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill The every other embodiment that personnel are obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", "vertical", The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to Convenient for the description present invention and simplify description, do not indicate or imply the indicated device or element must have a particular orientation, With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ", " third " is used for description purposes only, and is not understood to indicate or imply relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected;It can Can also be electrical connection to be mechanical connection;It can be directly connected, can also indirectly connected through an intermediary, Ke Yishi Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition Concrete meaning in invention.
Embodiment one
A kind of detection method of particle concentration free of cleaning is present embodiments provided, this method passes through dismountable sampling cartridge It sets, the concentration of particulate matter is detected based on weight method;
The sampling apparatus includes first half-shell, the second half-shell and fume filtering element;The fume filtering element is located at described first In the cavity that half-shell is formed with second half-shell;First half-shell, the second half-shell may be, but is not limited to using stainless steel or gather Tetrafluoroethene material;
The fume filtering element includes the first membrane structure and the second membrane structure;
In the first half-shell, outlet is arranged in second half-shell for the entrance setting of the sampling apparatus;Along institute The direction for stating entrance to the outlet is followed successively by the first half-shell, first membrane structure, second membrane structure and described Second half-shell;Preferably, the entrance of the sampling apparatus is that precut taper samples mouth, can be selected according to the flow velocity of sample gas Precut section appropriate;
First membrane structure includes the hydrophobic membrane filtrations such as polypropylene fibre filter membrane or polytetrafluoroethylene film;Described second Membrane structure includes glass fiber filter.First membrane structure, second membrane structure use above-mentioned material, greatly reduce institute The weight of fume filtering element is stated, can make Weight control within 15g;Wherein, the polypropylene fibre filter membrane is suitable for detection temperature Not higher than the particulate matter of 100 DEG C of oil smoke classes, intensity is good, will not deform, and no medium falls off, and improves particle concentration test Accuracy and precision;The polytetrafluoroethylene film is suitable for detecting the particulate matter that temperature is not higher than 260 DEG C of oil smoke classes;Institute Glass fibre membrane is stated, is suitable for detecting the particulate matter that temperature is not higher than 260 DEG C of oil smoke classes.
The sampling apparatus further includes oil smoke protecting film;The oil smoke protecting film is set to the periphery of the first half-shell. The oil smoke protecting film surface area is not less than the external surface area of the first half-shell, and the oil smoke protecting film can be covered to be entered except described in The periphery of the first half-shell except mouthful;The surface area of the oil smoke protecting film can also be more than the appearance of the first half-shell Area, the oil smoke protecting film can cover the periphery of the first half-shell in addition to the entrance, and part covers described the The periphery of two half-shells or the periphery of second half-shell in addition to the outlet.It is anti-by using the disposable oil smoke Cuticula is especially adsorbed and is polluted in the outer surface of the first half-shell to prevent oil smoke in the outer surface of the sampling apparatus;It keeps away The outer surface of the sampling apparatus, the cleaning operation of the outer surface of the especially described first half-shell are exempted from.
The material of the oil smoke protecting film may be, but is not limited to be polytetrafluoroethylene film, fire-retardant PP films, heat-resisting rubber Glued membrane or other resistance to thermal compound films etc.;Preferably, the thickness of the oil smoke protecting film is no more than 0.8mm.
The detection method of particle concentration free of cleaning described in the present embodiment passes through dismountable sampling apparatus and carries out particle The sampling of object;The sampling apparatus protects the fume filtering element using the first half-shell and second half-shell, reduces oil Influence of the flow velocity of cigarette to the fume filtering element testing result;The sampling apparatus realizes kitchen fumes using double membrane structure Effective detection of class high viscosity, particle concentration based on organic matter, test structure are accurate and reliable;Specifically, described First membrane structure includes polypropylene fibre filter membrane or polytetrafluoroethylene film, for filtering, absorbing the liquid oils in oil smoke, profit Ultra-fine fiber construction with the filter membrane of first membrane structure and good hydrophobic oleophilic oil can quickly absorb oil mass, reachable The oil mass of 6-20 times of weight itself;Second membrane structure includes glass fiber filter, has good hydrophobicity, for filtering Other particulate matters in oil smoke;First membrane structure and second membrane structure greatly reduce food and drink oil in material selection The interference of water in the particulate matter of cigarette;First membrane structure and second membrane structure are located in the fume filtering element, By replacing the disposable fume filtering element, avoids the sampling apparatus and manually clean difficult problem, also avoid because clear The problem of washing and need to using toxic reagent, simple to operate, at low cost, testing procedure and process are simple, and are easy to batch Manufacture;Particulate matter passes through first membrane structure, second membrane structure successively, using the double-deck membrane filtration pattern by food and drink exhaust gas The particulate matter of middle oil smoke class collects on the filter membrane of first membrane structure and on the filter membrane of second membrane structure, passes through entirety Weight method measures the weight before and after the fume filtering element detection particulate matter, and the concentration of particulate matter is calculated according to weight difference, was both reduced Laboratory also saves a large amount of analysis workload so that particulate matter to the measuring fixed amount of cleaning solution, drying and weighing operation Concentration determination is simple and practicable, greatly improves work efficiency.
The detection method of particle concentration free of cleaning described in the present embodiment includes the following steps:
Step 100 measures the fume filtering element net weight, net weight value m1;
Step 200, the assembly sampling apparatus;Connect the sampling apparatus and sampling gun;
Step 300, the sampling apparatus entrance be put into flue or chimney back to sampling air flow, set the sampling gun Sampling flow and volume V;The sampling gun is rotated, the entrance face sampling air flow of the sampling apparatus is enabled to be sampled;
The fume filtering element removes moisture removal and weighs after step 400, sampling, records the gravimetric value m2 that weighs;
Step 500 calculates particle concentration, and calculation formula is:(m2-m1)/V.
Specifically, including the following steps:
The first, the fume filtering element prepares before sampling:Every time the fume filtering element should be got out before test.It will be disposable The fume filtering element assembles, and then the fume filtering element is put into baking oven (precision ± 5 DEG C) under conditions of 100 ± 5 DEG C Dry at least 1h, take out the fume filtering element on the supporting rack in drier (silica-gel desiccant) cooling at least 2h to room temperature, Then it is weighed with assay balance (resolution ratio 0.1mg/0.01mg) until (i.e. front and back variation of weighing twice is no more than constant weight m1 0.5mg), that is, the fume filtering element net weight value m1;Then the entrance of the fume filtering element is sealed, and is put into plastic seal Bag is packed into protecting box;
It needs the fume filtering element being numbered before weighing, each weighing component must keep uniqueness and can trace Property.To shorten the operating time as possible when weighing and eliminate the influence of electrostatic.It is accurate to record the fume filtering element bare weight weighing result To 0.5mg;
The second, the sampling apparatus and airtight test are assembled:The fume filtering element is taken out of plastic sealing bag first Go out, and be put into the cavity that the first half-shell is formed with second half-shell, completes the assembly of the sampling apparatus;Again by institute The outlet for stating sampling apparatus is connect with sampling gun;Finally in the upper disposable oil smoke protection of sampling apparatus outer surface set The outer surface of film, i.e., the described first half-shell puts on the disposable oil smoke protecting film, seals the entrance of the sampling apparatus;Then Sampling gun is opened, that is, opens the sampling pump in sampling gun, extraction system negative pressure is 6~8kPa, and air-tightness is carried out using discharge method It checks, no more than 400~600ml/2 minutes or in 30s, system negative pressure declines no more than 0.2~0.4kPa quantity of gas leakage;
Third, spot sampling:Break a seal the entrance of the sampling apparatus, by the entrance of the assembled sampling apparatus back to Sampling air flow is put into flue or chimney, according to the relevant technologies regulation selection sampled point, the sampling in GB/T16157-1996 The sampling mouth of device is sampled, and sampling flow and volume V are set in the sampling gun;The sampling gun is rotated, described in order The entrance face sampling air flow of sampling apparatus is sampled, and for the rates such as control between 85%~115%, sampling volume V is not small In 0.8m3
4th, the fume filtering element weighs after sampling:The fume filtering element is removed from the sampling apparatus, and close The entrance for sealing the fume filtering element is packed into protecting box after being put into plastic sealing bag, takes back lab analysis;It is dried to reduce Influence of the organic component volatilization to test result accuracy in the particulate matter of oil smoke class in journey, the fume filtering element drying after sampling Using two methods:
First, air drying method, is suitable for the lower fume filtering element of sampling air flow humidity, by the oil after sampling Cigarette filter core takes out out of hermetic bag and is put on the supporting rack of drier, and (the discoloration of new rebirth silica gel drier is first put into drier Rate is no more than 10%), and normal temperature and pressure lower drying time is no less than 24 hours, then with assay balance (resolution ratio 0.1mg/ It 0.01mg) weighs until constant weight (i.e. front and back variation of weighing twice is no more than 0.5mg), filter core weighing result m2 after record sampling;
Second is that vacuum freeze-drying method, is suitable for the larger fume filtering element of sampling air flow humidity, it is true using gland type Vacuum freecing-dry machine is dried, and the fume filtering element is taken out out of hermetic bag and is put into pallet, drying program is:Prefreezing process (middling speed freezing is down to -20 DEG C~-35 DEG C, is kept for 2~4 hours) → lyophilization (it is warming up to -5 DEG C~5 DEG C afterwards, dry 1~ 2h) → parsing-desiccation (temperature rises to 15~25 DEG C, dry 2~4h);It is then placed in drier normal temperature and pressure lower drying time not Less than 24 hours, then weighed until constant weight (i.e. front and back change of weighing twice with assay balance (resolution ratio 0.1mg/0.01mg) Change and be no more than 0.5mg), filter core weighing result m2 after record sampling;
5th, particle concentration is calculated:Particle concentration=(m2-m1)/V.To ensure that the accuracy of test, filter membrane oil The particulate matter weightening of cigarette class should be no less than 3mg.
Preferably, the detection limit of the particulate matter of the oil smoke class of this method is not more than 1mg/m3
Air drying method, vacuum freeze-drying method are selected according to the humidity condition of sampling air flow.
Embodiment two
In order to preferably implement the embodiment of the present invention one the particle concentration free of cleaning detection method, the present invention also A kind of sampling apparatus of the particle concentration free of cleaning for realizing the present invention is provided, the present invention is exempted from below in conjunction with the accompanying drawings The embodiment for cleaning the sampling apparatus of particle concentration is described in further detail.
Shown in Fig. 1, Fig. 2, a kind of sampling apparatus of particle concentration free of cleaning is present embodiments provided;Fig. 1 is institute State the structural schematic diagram of sampling apparatus;Fig. 2 is the structural exploded view of the sampling apparatus;In order to more clearly show that structure, Fig. 1 show the sectional view of sampling apparatus, and fume filtering element shown in Fig. 2 is shown as sectional view.
Shown in Fig. 1, Fig. 2, the sampling apparatus of particle concentration free of cleaning provided in this embodiment, the sampling apparatus Including first half-shell 1, the second half-shell 2 and fume filtering element 3;The fume filtering element 3 is located at the first half-shell 1 and described the second half In the cavity that shell 2 is formed;
The fume filtering element 3 includes the first membrane structure 31 and the second membrane structure 32;
In the first half-shell 1, outlet 5 is arranged in second half-shell 2 for the setting of entrance 4 of the sampling apparatus;Edge The direction for the entrance 4 to the outlet 5 is followed successively by the first half-shell 1, first membrane structure 31, the second film knot Structure 32 and second half-shell 2;
First membrane structure 31 includes polypropylene fibre filter membrane or polytetrafluoroethylene film;Second membrane structure 32 is wrapped Include glass fiber filter.
The sampling apparatus further includes oil smoke protecting film 6;The oil smoke protecting film 6 is set to the outer of the first half-shell 1 Week.
The sampling apparatus of particle concentration free of cleaning described in the present embodiment has particulate matter free of cleaning described in embodiment one The advantages of the advantages of detection method of concentration, the detection method of the particle concentration free of cleaning disclosed in embodiment one, is herein It is not repeated to describe.
First membrane structure 31 described in the present embodiment, second membrane structure 32, the oil smoke protecting film 6 are in embodiment one It has been had a detailed description that, be not repeated herein.
In the present embodiment alternative, the fume filtering element 3 include sampling pipe 33 and filter core cover 34, the sampling pipe 33 with The filter core cover 34 connects, and the inner cavity of the sampling pipe 33 is connected to the inner cavity of the filter core cover 34;
First membrane structure 31 and second membrane structure 32 are located inside the filter core cover 34;First film Structure 31 is relative to second membrane structure 32, close to the sampling pipe 33;
The sampling pipe 33 stretches out the first half-shell 1.By the sampling pipe 33 so that particulate matter enters the filter core Cover 34, and then particulate matter is acquired by first membrane structure 31 and second membrane structure 32;By the filter core cover 34 with Just first membrane structure 31 and second membrane structure 32 are protected, avoids destroying described when taking the fume filtering element 3 One membrane structure 31 and second membrane structure 32.
Wherein, the sampling pipe 33 can be straight tube, or external bend pipe, it specifically can be according to the direction of sampling air flow It is set;
The sampling pipe 33, filter core cover 34, isolation supporting network 311, filter membrane protecting wire net 321 material can not limit respectively In copper, iron, stainless steel, aluminium, aluminium alloy, plastics, ceramics etc.;Preferably, the sampling pipe 33, filter core cover 34, isolation support Net 311, filter membrane protecting wire net 321 material can be not limited to the light materials such as aluminium, aluminium alloy, plastics respectively;Preferably, described Sampling pipe 33, filter core cover 34, isolation supporting network 311, filter membrane protecting wire net 321 material be plastics, the plastics be polypropylene, PVDF, PFTE are one or more of.
First membrane structure 31 further includes isolation supporting network 311;Relative to the polypropylene fibre filter membrane or described Polytetrafluoroethylene film, the isolation supporting network 311 is close to second membrane structure 32.It is isolated by the isolation supporting network 311 The filter membrane of the filter membrane of first membrane structure 31 and second membrane structure 32 protects filter membrane and the institute of first membrane structure 31 State the filter membrane of the second membrane structure 32.
Second membrane structure 32 further includes filter membrane protecting wire net 321;Relative to the glass fiber filter, the filter membrane protecting wire net 321 far from first membrane structure 31.The filter membrane that second membrane structure 32 is protected by the filter membrane protecting wire net 321, that is, protect The glass fiber filter.
In the another alternative of the present embodiment, the first half-shell 1 includes gland 11 and first shell 12;
The first shell 12 between the gland 11 and second half-shell 2, the first shell 12 with it is described Second half-shell 2 forms the cavity;
The gland 11 is detachably connected with second half-shell 2.When fastening the sampling apparatus, the first shell 12 is opposing stationary with second half-shell 2, only need to turn or move the gland 11, protect positioned at the first shell The fume filtering element 3 in the cavity that body 12 is formed with second half-shell 2, reduces and is made because assembling the sampling apparatus The damage of 3 structure of the pairs of fume filtering element;It is protected by the gland 11, the first shell 12 and second half-shell 2 The fume filtering element 3 reduces influence of the flow velocity of oil smoke to 3 testing result of the fume filtering element.
The gland 11 can be to be threadedly coupled, snap connection with the connection type of second half-shell 2, or its His connection type;Preferably;The gland 11 is connected through a screw thread with second half-shell 2.
The material of the gland, the first shell and second half-shell is respectively copper, iron, stainless steel, aluminium, aluminium conjunction Gold, plastics, ceramics etc.;Preferably, the gland, the first shell and second half-shell use identical material, Material is stainless steel.
In order to improve the accuracy that the fume filtering element 3 acquires particulate matter, the gland 11 and the first shell 12 it Between be provided with the first sealing ring 7;The second sealing ring 8 is provided between the filter core cover 34 and second half-shell 2;To prevent from adopting Sample gas leak.
In order to protect the sampling pipe 33, pillar 121 is set outside the first shell 12, the pillar 121 stretches out The gland 11, the shape of the pillar 121 and the shape of the sampling pipe 33 are adapted;
The sampling pipe 33 is inserted into and stretches out the pillar 121, and the outer wall of the sampling pipe 33 is interior with the pillar 121 Wall is in sealing contact;The entrance of the sampling pipe 33 is that precut taper samples mouth, and it is appropriate to be selected according to the flow velocity of sample gas Precut section.
That is, the entrance 4 of the sampling apparatus is the entrance of the sampling pipe 33;It is arranged in second half-shell 2 The outlet connection being connected in second half-shell 2, the outlet connection are the outlet 5 of the sampling apparatus.
Second half-shell 2 further includes netted or sieve plate shape filter membrane support, the filter membrane support are connect with the outlet connection.
Embodiment three
It is described to exempt from clearly this embodiment offers a kind of sample devices of particle concentration free of cleaning shown in Fig. 3, Fig. 4 The sample devices for washing particle concentration includes the sampling apparatus of the particle concentration free of cleaning of embodiment two;Two institute of embodiment Disclosed technical solution also belongs to the embodiment, which is not repeated to describe.
Fig. 3 is the structural schematic diagram of the sample devices of particle concentration free of cleaning provided in this embodiment, is shown as in figure The pipette tips of sampling gun are inserted into the indoor state of chamber of sample gas, and arrow direction shown in figure is the flow velocity side of sample gas To;Fig. 4 is the partial enlarged view of the sample devices of particle concentration free of cleaning shown in Fig. 3.
Shown in Fig. 3, Fig. 4, the sample devices of particle concentration free of cleaning provided in this embodiment, including it is described exempt from it is clear Wash the sampling apparatus of particle concentration;
Further include sampling gun 9, the sampling gun interface of the sampling gun 9 connects the outlet of the sampling apparatus 91;To lead to It crosses the sampling gun 9 and realizes sampling of the sampling apparatus 91 of embodiment two about particulate matter.
The sampling gun 9 includes temperature sensor 92, and the temperature sensor 92 is adopted for incuding the sampling apparatus 91 The temperature of sample gas;
The sampling gun 9 further includes pitot tube anemometer 93, and the pitot tube anemometer 93 is for measuring the sampling cartridge Set the flow velocity of 91 sample gas;
The sampling gun 9 further includes controller 94, the controller 94 and the temperature sensor 92, the Pitot tube wind 93 electrical connection of speed meter, for receiving information and being shown in the display screen of the controller 94.Pass through the temperature sensor 92 Incude the temperature of sample gas, the flow velocity of the measurement sample gas of the pitot tube anemometer 93, and is shown in the controller 94 On, so that people is obtained more information in the particle concentration for measuring kitchen fumes class, so that particle concentration data is had more can Compare property.
Finally it should be noted that:The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations;To the greatest extent Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that:Its according to So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into Row equivalent replacement;And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution The range of scheme.

Claims (10)

1. a kind of sample devices of particle concentration free of cleaning, which is characterized in that including sampling apparatus and sampling gun, the sampling The sampling gun interface of rifle connects the outlet of the sampling apparatus;
The sampling apparatus includes first half-shell, the second half-shell and fume filtering element;The fume filtering element is located at the first half-shell In the cavity formed with second half-shell;
The fume filtering element includes the first membrane structure and the second membrane structure;
In the first half-shell, outlet is arranged in second half-shell for the entrance setting of the sampling apparatus;Along it is described enter Mouth to the direction of the outlet is followed successively by the first half-shell, first membrane structure, second membrane structure and described second Half-shell;
First membrane structure includes polypropylene fibre filter membrane or polytetrafluoroethylene film;Second membrane structure includes glass fibers Tie up filter membrane.
2. the sample devices of particle concentration free of cleaning according to claim 1, which is characterized in that the sampling gun includes Temperature sensor, the temperature sensor are used to incude the temperature of the sampling arrangement samples gas.
3. the sample devices of particle concentration free of cleaning according to claim 2, which is characterized in that the sampling gun also wraps Pitot tube anemometer is included, the pitot tube anemometer is used to measure the flow velocity of the sampling arrangement samples gas;
The sampling gun further includes controller, and the controller is electrically connected with the temperature sensor, the pitot tube anemometer, For receiving information and being shown in the display screen of the controller.
4. the sample devices of particle concentration free of cleaning according to claim 1, which is characterized in that the sampling apparatus is also Including oil smoke protecting film;The oil smoke protecting film is set to the periphery of the first half-shell.
5. the sample devices of particle concentration free of cleaning according to claim 1, which is characterized in that the fume filtering element packet Sampling pipe and filter core cover are included, the sampling pipe is connect with the filter core cover, and the inner cavity of the sampling pipe is interior with the filter core cover Chamber is connected to;
First membrane structure and second membrane structure are located inside the filter core cover;First membrane structure relative to Second membrane structure, close to the sampling pipe;
The sampling pipe stretches out the first half-shell.
6. the sample devices of particle concentration free of cleaning according to claim 5, which is characterized in that first membrane structure It further include isolation supporting network;Relative to the polypropylene fibre filter membrane or the polytetrafluoroethylene film, the isolation supporting network Close to second membrane structure.
7. the sample devices of particle concentration free of cleaning according to claim 5, which is characterized in that second membrane structure It further include filter membrane protecting wire net;Relative to the glass fiber filter, the filter membrane protecting wire net is far from first membrane structure.
8. the sample devices of particle concentration free of cleaning according to claim 5, which is characterized in that the first half-shell packet Include gland and first shell;
Between the gland and second half-shell, the first shell is formed the first shell with second half-shell The cavity;
The gland is detachably connected with second half-shell.
9. the sample devices of particle concentration free of cleaning according to claim 8, which is characterized in that the gland with it is described The first sealing ring is provided between first shell;It is provided with the second sealing ring between the filter core cover and second half-shell.
10. the sample devices of particle concentration free of cleaning according to claim 8, which is characterized in that the first shell Outside is provided with pillar, and the pillar stretches out the gland, and the shape of the pillar and the shape of the sampling pipe are adapted;
The sampling pipe is inserted into and stretches out the pillar, and the outer wall of the sampling pipe is contacted with the inner wall sealing of the pillar.
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