CN104458352A - Large-flow sampling device for industrial flue gas particulate matters - Google Patents
Large-flow sampling device for industrial flue gas particulate matters Download PDFInfo
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- CN104458352A CN104458352A CN201410810925.2A CN201410810925A CN104458352A CN 104458352 A CN104458352 A CN 104458352A CN 201410810925 A CN201410810925 A CN 201410810925A CN 104458352 A CN104458352 A CN 104458352A
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Abstract
The invention discloses a large-flow sampling device for industrial flue gas particulate matters. The large-flow sampling device comprises a sampling gun, a filter device, a flow rate metering device, a diluting and cooling device, a water cooling device and a vortex gas pump which are connected through a pipeline in sequence, wherein the filter device comprises an upper taper cylinder and a lower cylinder which are symmetrically arranged up and down, the diameter of the upper tape cylinder is gradually increased from top to bottom, a supporting ring is clamped between the upper taper cylinder and the lower taper cylinder, a groove is formed in the bottom of the supporting ring, a filter film and a supporting plate of the filter film are arranged in the groove of the supporting ring from top to bottom in sequence, the filter film and the supporting plate are clamped and pressed between the upper taper cylinder and the supporting ring; the upper end of the upper taper cylinder is connected to the sampling gun through a hose I; the lower end of the lower taper cylinder is connected to the flow rate metering device through a hose II; the aperture ratio of the supporting plate is greater than 50%; an accumulative integrating instrument is attached to the flow rate metering device. The large-flow sampling device can be used for quickly realizing large-flow sampling of particulate matters of low-concentration emission source flue gas.
Description
Technical field
The present invention relates to the granular material discharged Concentration Testing of industrial smoke discharge and the large discharge Sampling techniques field of emission source parsing, particularly low emission concentration (<10mg/ standard m
3) time the granular material discharged concentration determination of flue gas and the emission source large discharge sampling apparatus of resolving.
Background technology
Along with the progress of dust collecting technique, stationary source emission point granular material discharged, more and more lower (the <10mg/ standard m of concentration
3), traditional dust-laden tester due to limited flow (≤80L/min), when concentration of emission is 10mg/ standard m
3time, gather 1g sample required for time>=20.8 hours, when concentration of emission is 1mg/ standard m
3time, required time>=208 hours, this will increase labour intensity and the cycle of environmental monitoring greatly.As very low (the <5mg/ standard m of concentration of emission
3) time, how will foreshorten to 10 hours the sampling time, large discharge sampling solves the good method of this problem beyond doubt.
Summary of the invention
The present invention provides a kind of large discharge industrial smoke particle sampling device for solving in known technology the technical matters that exists, and this device can realize a large amount of collections (>1g) of the particle of low concentration emission source flue gas fast.
The technical scheme that the present invention takes for the technical matters existed in solution known technology is: a kind of large discharge industrial smoke particle sampling device, comprise the sampling gun, filtration unit, flow measurement device, dilution cooling device, water cooling plant and the whirlpool air pump that are connected successively by pipeline, be provided with the support I affixed with it in the below of described sampling gun, described filtration unit is arranged on support II;
Described filtration unit comprises upper and lower symmetrically arranged upper conical-tube and slower conical tube, the diameter of described upper conical-tube increases from top to bottom gradually, support ring has been clamped between described upper conical-tube and described slower conical tube, groove is provided with bottom described support ring, in the groove of described support ring, be provided with the filter membrane set gradually from top to bottom and back up pad thereof, described filter membrane and described back up pad clamp between described upper conical-tube and described support ring; The upper end of described upper conical-tube is connected by flexible pipe I with described sampling gun, and the lower end of described slower conical tube is connected by flexible pipe II with described flow measurement device; The percentage of open area percentage of open area >50% of described back up pad; Described flow measurement device is accumulative integrating instrument incidentally.
Described dilution cooling device is provided with vertical blast pipe, and described vertical blast pipe is provided with the plunger valve set gradually from top to bottom and resistance balance valve.
Described water cooling plant comprises water tank and is fixed on the cooling tube in described water tank, described cooling tube is provided with vertical air inlet pipeline section, bottom level cooling pipeline section and pipeline section of vertically giving vent to anger successively according to gas flow direction, the shape of described bottom level cooling pipeline section is " own " font, the described entrance of vertical air inlet pipeline section is connected by flexible pipe III with the outlet of described flow measurement device, and the outlet of described pipeline section of vertically giving vent to anger is connected by flexible pipe IV with the entrance of described whirlpool air pump.
Described flow measurement device is also accompanied with pressure transducer and temperature sensor.
Described support I comprises top braces ring, is provided with and its three supporting legs be connected by abutment ring, is provided with dependence post in the upper inner of described abutment ring in the below of described top braces ring; The door shape brace summer affixed with it is crossed with in the upper center of described top braces ring, support column is connected with at the middle part of described door shape brace summer, the upper end of described support column and the bottom of sampling gun anchor ear affixed, described support column is threaded with the frustum be positioned at below described door shape brace summer, and described frustum is positioned at the central authorities of described top braces ring; Described dependence post leans against on the outside surface of described frustum.
The advantage that the present invention has and good effect are: adopt the whirlpool air pump of large discharge and the filter membrane of large area of passage, adopt the back up pad of high opening rate and establish reeded support ring to support filter membrane, when ensure filter membrane not cracky, lower resistance guarantee is provided for realizing large discharge, enable the present invention realize the large discharge of 1000L/min, fast and effeciently can realize a large amount of collections of low concentration emission source particle.Compared with traditional dust-laden tester when sampling quantity is identical, the sampling period 92% can be shortened, improve sampling efficiency, for the test of discharge quantity of particulate matter of the flue gas of the stationary source emission point of each department and the chemical analysis of particle provide huge facility.Particularly suitable low emission concentration (<10mg/ standard m
3) the particle sampling of emission source flue gas.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is filtration unit decomposing schematic representation of the present invention;
Fig. 3 is water cooling plant vertical view of the present invention;
Fig. 4 is the 1-1 sectional view of Fig. 3;
Fig. 5 is the 2-2 sectional view of Fig. 3;
Fig. 6 is dilution cooling device structural representation of the present invention;
Fig. 7 is support I structural representation of the present invention;
Fig. 8 is the vertical view of Fig. 7.
Embodiment
For summary of the invention of the present invention, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1 ~ Fig. 8, a kind of large discharge industrial smoke particle sampling device, comprise connected successively by pipeline sampling gun 2, filtration unit 4, flow measurement device 6, dilution cooling device 7, water cooling plant 9 and whirlpool air pump 11, be provided with the support I 12 affixed with it in the below of described sampling gun 2, described filtration unit 4 is arranged on support II 13.
Described filtration unit 4 comprises upper and lower symmetrically arranged upper conical-tube 4-1 and slower conical tube 4-5, the diameter of described upper conical-tube 4-1 increases from top to bottom gradually, support ring 4-4 has been clamped between described upper conical-tube and described slower conical tube, groove is provided with bottom described support ring 4-4, in the groove of described support ring, be provided with the filter membrane 4-2 and back up pad 4-3 thereof that set gradually from top to bottom, described filter membrane 4-2 and described back up pad 4-3 clamps between described upper conical-tube 4-1 and described support ring 4-4.Between described filter membrane 4-2 and described upper conical-tube 4-1, be provided with silica gel sealing ring, between described back up pad 4-3 and described support ring 4-4, be provided with silica gel sealing ring, between described support ring 4-4 and described slower conical tube 4-5, be provided with silica gel sealing ring.The upper end of described upper conical-tube 4-1 is connected by flexible pipe I 3 with described sampling gun 2, and the lower end of described slower conical tube 4-5 is connected by flexible pipe II 5 with described flow measurement device 6; The percentage of open area >50% of described back up pad 4-3; Described flow measurement device 6 is accumulative integrating instrument incidentally.
Filter membrane in upper conical-tube 4-1 and support ring 4-4 groove and the compression of back up pad thereof, sealing and and slower conical tube 4-5 between compress, seal and rely on the securing member such as bolt, nut and O-ring seal to realize.
In the present embodiment, described dilution cooling device 7 is provided with vertical blast pipe 7-1, and described vertical blast pipe 7-1 is provided with the plunger valve 7-2 set gradually from top to bottom and resistance balance valve 7-3.The rapid-acting coupling that described dilution cooling device 7 pipe end is provided with rapid-acting coupling reserved with flow measurement device pipe end pipeline realizes being connected by clip and O-ring seal.The air inflow of outside air is regulated by plunger valve 7-2, resistance balance valve 7-3 successively, and wherein resistance balance valve 7-3 plays coarse adjustment effect.After coarse adjustment, then adjustable column plug valve 7-2 makes flow system flow finely tune.Described water cooling plant 9 comprises water tank 9-1 and is fixed on the cooling tube in described water tank 9-1, described cooling tube is provided with vertical air inlet pipeline section 9-2, bottom level cooling pipeline section 9-3 and the pipeline section 9-4 that vertically gives vent to anger successively according to gas flow direction, the shape of described bottom level cooling pipeline section 9-3 is " own " font, the entrance of described vertical air inlet pipeline section 9-2 is connected by flexible pipe III 8 with the outlet conduit of described flow measurement device 6, and the outlet of the described pipeline section 9-4 that vertically gives vent to anger is connected by flexible pipe IV 10 with the entrance of described whirlpool air pump 11.Described flow measurement device 6 is also accompanied with pressure transducer and temperature sensor.Described support I 12 comprises top braces ring 12-8, is provided with and its three supporting leg 12-3 be connected by abutment ring 12-7 in the below of described top braces ring 12-8, is provided with leans on post 12-2 in the upper inner of described abutment ring 12-7; The door shape brace summer 12-5 affixed with it is crossed with in the upper center of described top braces ring 12-8, support column 12-6 is connected with at the middle part of described door shape brace summer 12-5, the upper end of described support column 12-6 and the bottom of sampling gun anchor ear 12-4 affixed, described support column 12-6 is threaded with the frustum 12-1 be positioned at below described door shape brace summer 12-5, and described frustum 12-1 is positioned at the central authorities of described top braces ring 12-8; Described dependence post 12-2 leans against on the outside surface of described frustum 12-1.
When the particle being fixed source flue gas detects, pitot tube 14 is first utilized to measure the wind speed at chimney 15 build-in test point place, according to calculating sampling mouth 1-1,1-2 or 1-3 of selecting suitable bore.During sampling, after being connected by all parts, open Vortex pump 11, sampling gun 2 is inserted in chimney, the integrated flow of recording flowmeter amount device 8, regulate dilution cooling device 7, make the sample rate at sampling mouth place consistent with the wind speed of chimney extraction point, meet the requirement of isokinetic sampling.Collected flue gas flow direction refers to the gas flow arrow in Fig. 1, and collected flue gas enters air finally by whirlpool air pump 11.
The specification that legacy sampler commonly uses filter cylinder is: 30mm × 80mm, and filter area is 0.007536m
2; Maximum specification is: 53mm × 145mm, and filter area is: 0.024m
2; Under the pure air flow of 5L/min, resistance is 3kPa; If flow reaches 1000L/min, resistance can be very large, and large diameter filter membrane therefore must be adopted as filter medium.The present invention can adopt the circular filter membrane of the glass fibre of maximum 293mm diameter or quartz fibre filter membrane, and maximum filtering area is: 0.067m
2when filtering the wind speed 0.4m/s of pure air, pressure drop is 5000Pa, can reach: 1608L/min by 0.4m/s calculated flow rate, meet the demand of unloaded resistance <5000Pa during large discharge sampling, for the type selecting of follow-up whirlpool air pump 11 provides advantage.
Because the thickness of filter membrane is only 0.4mm, under negative pressure condition, be easy to breakage; Therefore when membrane filtration, back up pad must be had to be close to filter membrane, while ensureing that filter membrane is not damaged, back up pad must ensure large vapor permeation area, to ensure that filter membrane has enough effective filtration areas.The present invention adopts the corrosion resistant plate of high opening rate in the design of filter membrane back up pad.The corrosion resistant plate of high opening rate, while ensureing enough rigidity, also has good resistance to elevated temperatures.
Refer to Fig. 1, after filter membrane is installed, peripheral sealing adopts silica gel sealing ring, can ensure that filtration unit has good leakproofness.The metering of sample gas adopts the orifice flow-measurement device 6 of subsidiary pressure transducer, temperature sensor and accumulative integrating instrument to measure, the instantaneous delivery of exportable mark condition and integrated flow.Adopt whirlpool air pump 11 as air extractor.When the gas temperature entering whirlpool air pump is higher than 70 DEG C, need cool gas, the present invention jointly carrys out adjust flux by dilution cooling device 7 and water cooling plant 9 and enters the gas temperature of whirlpool air pump 11.
According to the performance curve of whirlpool air pump 11, along with increasing of the particle that filter membrane adheres to, SR increases, and the flow of corresponding whirlpool air pump 11 can reduce.For ensureing the constant of sampling flow, the flow of whirlpool air pump when maximum load should be greater than sampling flow.When filter membrane load is less, regulate sampling flow by regulating the aperture of valve on the frequency of whirlpool air pump 11 and dilution cooling device 7.
Sampling apparatus conduit connection divides the quick thimble connector of employing 304 stainless steel.Thimble connector is furnished with resistant to elevated temperatures silicone gasket.This design can ensure that instrument removal is convenient, can ensure good impermeability again.
After sampling gun is installed, the height of support I 12 can regulate, control method is: rotate the frustum 12-1 being positioned at mid-stent, in the process screwing on or screw off, the angle of three dependence post 12-2 and frustum 12-1 can change, the angle of supporting leg 12-3 and surface level also changes thereupon, because the length of supporting leg 12-3 is certain, when frustum 12-1 moves up, the angle of supporting leg 12-3 and surface level can become large, the strong point height of bracing frame can be raised, and vice versa.
In sum, the present invention adopts isokinetic sampling's principle, and by large-area filter membrane, the whirlpool air pump of large discharge realizes low emission concentration (<10mg/ standard m
3) time granular material discharged Concentration Testing and emission source resolve large discharge sampling.The present invention adopts glass fiber filter or the quartz fibre filter membrane of major diameter (maximum gauge is 293mm), resampling filter is carried out to the dust in hot industry flue gas, follow-up flow measurement device can accurate-metering flue gas flow, and flow can reach 60 ~ 80 standard m
3/ h.Solve low (the <10mg/ standard m of current concentration of emission
3) when, traditional dust-laden analyzer sampling time is long, the problem that sampling deviation is large.The Dust Capacity of large discharge sampling apparatus collection is more in addition, can provide a large amount of direct sample sizes for the particle analysis of emission source discharge, for subsequent analysis provides convenient.
Although be described the preferred embodiments of the present invention by reference to the accompanying drawings above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, can also make a lot of form, these all belong within protection scope of the present invention.
Claims (5)
1. a large discharge industrial smoke particle sampling device, it is characterized in that, comprise the sampling gun, filtration unit, flow measurement device, dilution cooling device, water cooling plant and the whirlpool air pump that are connected successively by pipeline, be provided with the support I affixed with it in the below of described sampling gun, described filtration unit is arranged on support II;
Described filtration unit comprises upper and lower symmetrically arranged upper conical-tube and slower conical tube, the diameter of described upper conical-tube increases from top to bottom gradually, support ring has been clamped between described upper conical-tube and described slower conical tube, groove is provided with bottom described support ring, in the groove of described support ring, be provided with the filter membrane set gradually from top to bottom and back up pad thereof, described filter membrane and described back up pad clamp between described upper conical-tube and described support ring; The upper end of described upper conical-tube is connected by flexible pipe I with described sampling gun, and the lower end of described slower conical tube is connected by flexible pipe II with described flow measurement device; The percentage of open area percentage of open area >50% of described back up pad; Described flow measurement device is accumulative integrating instrument incidentally.
2. large discharge industrial smoke particle sampling device according to claim 1, it is characterized in that, described dilution cooling device is provided with vertical blast pipe, and described vertical blast pipe is provided with the plunger valve set gradually from top to bottom and resistance balance valve.
3. large discharge industrial smoke particle sampling device according to claim 1, it is characterized in that, described water cooling plant comprises water tank and is fixed on the cooling tube in described water tank, described cooling tube is provided with vertical air inlet pipeline section, bottom level cooling pipeline section and pipeline section of vertically giving vent to anger successively according to gas flow direction, the shape of described bottom level cooling pipeline section is " own " font, the described entrance of vertical air inlet pipeline section is connected by flexible pipe III with the outlet of described flow measurement device, and the outlet of described pipeline section of vertically giving vent to anger is connected by flexible pipe IV with the entrance of described whirlpool air pump.
4. large discharge industrial smoke particle sampling device according to claim 1, it is characterized in that, described flow measurement device is also accompanied with pressure transducer and temperature sensor.
5. large discharge industrial smoke particle sampling device according to claim 1, it is characterized in that, described support I comprises top braces ring, is provided with and its three supporting legs be connected by abutment ring, is provided with dependence post in the upper inner of described abutment ring in the below of described top braces ring; The door shape brace summer affixed with it is crossed with in the upper center of described top braces ring, support column is connected with at the middle part of described door shape brace summer, the upper end of described support column and the bottom of sampling gun anchor ear affixed, described support column is threaded with the frustum be positioned at below described door shape brace summer, and described frustum is positioned at the central authorities of described top braces ring; Described dependence post leans against on the outside surface of described frustum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410810925.2A CN104458352A (en) | 2014-12-22 | 2014-12-22 | Large-flow sampling device for industrial flue gas particulate matters |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410810925.2A CN104458352A (en) | 2014-12-22 | 2014-12-22 | Large-flow sampling device for industrial flue gas particulate matters |
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| CN104458352A true CN104458352A (en) | 2015-03-25 |
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| CN201410810925.2A Pending CN104458352A (en) | 2014-12-22 | 2014-12-22 | Large-flow sampling device for industrial flue gas particulate matters |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655725A (en) * | 2017-09-15 | 2018-02-02 | 苏州西热节能环保技术有限公司 | A kind of super low concentration particle sampling pipette tips suitable for low temperature and high relative humidity environment |
| CN108801711A (en) * | 2017-05-05 | 2018-11-13 | 中国辐射防护研究院 | A kind of aerosol sampler quickly connected |
| CN109406229A (en) * | 2018-11-15 | 2019-03-01 | 华电电力科学研究院有限公司 | A kind of high-humidity gas fume dilution sampling device and its method of sampling |
| CN111397978A (en) * | 2019-06-18 | 2020-07-10 | 电子科技大学中山学院 | Straw combustion gas sampling method and device |
| CN112284836A (en) * | 2020-10-20 | 2021-01-29 | 江苏天楹等离子体科技有限公司 | Plasma tail gas sampling pretreatment system |
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111397978A (en) * | 2019-06-18 | 2020-07-10 | 电子科技大学中山学院 | Straw combustion gas sampling method and device |
| CN112284836A (en) * | 2020-10-20 | 2021-01-29 | 江苏天楹等离子体科技有限公司 | Plasma tail gas sampling pretreatment system |
| 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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Application publication date: 20150325 |