CN1320345C - Portable flue gas constant temperature dilution sampling analyzer - Google Patents
Portable flue gas constant temperature dilution sampling analyzer Download PDFInfo
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- CN1320345C CN1320345C CNB2004100568868A CN200410056886A CN1320345C CN 1320345 C CN1320345 C CN 1320345C CN B2004100568868 A CNB2004100568868 A CN B2004100568868A CN 200410056886 A CN200410056886 A CN 200410056886A CN 1320345 C CN1320345 C CN 1320345C
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Abstract
The present invention relates to a portable flue gas analyzer with constant temperature dilution and sampling, which comprises a connection frame, a flue dilution pipeline and a staying chamber. A sampler and a flange of a flue opening are connected by the connection frame. The connection frame comprises a front clamping plate, a back clamping plate, a U-shaped clamp and bolts, wherein the U-shaped clamp is positioned between the front clamping plate and the back clamping plate, and the front clamping plate, the back clamping plate and the U-shaped clamp are connected by the bolts. Spacing top threads are arranged on the back clamping plate. The front clamping plate is provided with nuts corresponding to the spacing top threads. The flue diluting pipeline is a straight pipe, and the flue diluting pipeline is provided with a spray head with three nozzles and a main pipeline. The other end of the main pipeline is connected with an elbow of 90 DEG, a flow collection opening is arranged in the elbow, the end of the elbow is connected with four sampling openings, and the sampling openings are respectively connected with the staying chamber through pipelines. The analyzer is firmly fixed, and the analyzer can not cause the sampling to be inaccurate due to the change of the horizontal and the vertical positions of the sampling pipe by the movement of the dilution pipeline. As the present invention is provided with the flow collection openings and is additionally provided with a temperature control device with a heat insulation layer, the sampling precision is enhanced. As the staying chamber is miniaturized, the present invention is suitable for the flue sampling work under various conditions.
Description
Technical field
The present invention relates to flue sampling analysis device, specifically, relate to a kind of portable flue gas constant temperature dilution sampling analyzer.
Background technology
General chimney is all reserved the ring flange mouth of and chimney inner straight when design, be used for regular detection, the sampling of chimney, because not fixedly requirement of this ring flange mouth, so different chimneys just has different ring flange mouths, this give the stationary source sampling system sampling pipe fixedly bring very big difficulty.The mode that the tradition dilution tunnel adopts four pin to support when this problem of processing, this fixed form is just played a supporting role to sampling pipe, to such an extent as to the sampling pipe dilution tunnel can not be fixed.
Because the traditional design of fixed source diluting passage often is designed to U type pipe and following U type cast, and sampling and chamber be one, so volume is bigger, and sampling pipe is connected difficult with flue; For the fixed dilution channel body also will design the shelf that is fit to passage, its volume and weight is all bigger.
Traditional flue gas dilution sampling analyzer is not owing to have temperature controlling instruments, collected specimens not to have horizontal comparability, the sampling poor repeatability; Sampling pipe can not correctly be fixed, and often causes the sampling pipe displacement, and sampling precision is descended; Volume is not easy to transportation greatly, is not suitable for field sampling; The tradition chamber can only be gathered and be stopped the back sample, and a plurality of sampling head places same chamber, and the volume of chamber is bigger, is not easy to transportation and field sampling.
Do not have the accurate temperature controlling process in the whole process of sampling, the stationary source pollutant exists with aerocolloidal form in discharge process, and temperature is formed with very big influence to aerocolloidal; When the setting up of the calculating of emission factor and mathematical model should be standard with certain temperature, also only in the consistance that could guarantee under the condition of strict temperature control after each sampling and simulation different fixing source are being discharged into atmosphere.Therefore, do not have precise dose control must cause the precision of sampling not enough, and to later data processing, the calculating of emission factor and the foundation of mathematical model cause difficulty.
Summary of the invention
The purpose of this invention is to provide the portable accurately flue gas constant temperature of a kind of sampling dilution sampling analyzer.
Portable flue gas constant temperature dilution sampling analyzer of the present invention comprises the link that sampling thief is connected with the floss hole ring flange, flue dilution tunnel and chamber.Described link comprises front plate, rear plate, and U-shaped card between forward and backward clamping plate and the bolt that is connected above-mentioned three, its rear plate is provided with spacing jackscrew; Described flue dilution tunnel is a straight tube, comprise shower nozzle and trunk line with three nozzles, an end of trunk line is connected with one 90 degree elbow, is provided with the receipts head piece in this elbow, its end is connected with four thief hatchs, and each thief hatch is connected with a chamber respectively by pipeline.
The small end bore of described receipts head piece is 1: 2 with the ratio in large port footpath.
Described chamber comprises reduced diameter portion, and end bucket and the stop chamber that is connected with end bucket by clip and reduced diameter portion are equipped with the particle cutting head in the bucket.
Sampling analysis device of the present invention also is provided with air preheater, before the air cleaner that this air preheater is arranged on shower nozzle is connected.
Outside air cleaner, dilution tunnel, chamber and their connecting tube, thermal insulating warm-keeping layer is set.
Sampling analysis device of the present invention also has humidity control system, and this system comprises temperature sensor and the pressure unit that is arranged on the Venturi tube, is controlled by computer supervisory control system.
Sampling analysis device of the present invention also is provided with two bracing frames, and this bracing frame comprises base with roller and the support post that is installed on the base, and described column is provided with the active card ring seat, has the semicircle snap ring of two mutual hinges on the snap ring seat.
The advantage and the good effect of portable flue gas constant temperature dilution sampling analyzer of the present invention are as follows:
1. fixed, can not change, and make sampling inaccurate because of the mobile level of sampling pipe and the vertical position of causing of dilution tunnel;
2. owing to receive the design of head piece and increased the heat-insulation layer temperature control device, improved sampling precision;
3. because the miniaturization of chamber makes whole instrument become very small and exquisite, be fit to the flue sampling work of various conditions more.
4. this dilution tunnel is designed to straight tube meeting on the basis of rules, and is littler with respect to the dilution tunnel design volume of traditional U type pipe, and big flow blower fan, air cleaner, chamber are separated with trunk line, adopts flange to connect various piece, is easier to transportation.
Description of drawings
Fig. 1 is a portable flue gas constant temperature dilution sampling analyzer structural representation of the present invention;
Fig. 2 is the structural representation of the chamber of analyzer shown in Figure 1;
Fig. 3 is the another kind of user mode synoptic diagram of the chamber of analyzer shown in Figure 2;
Fig. 4 is an A portion structural representation among Fig. 1;
The structural representation of the link of the analyzer that Fig. 5 chamber is shown in Figure 1;
Fig. 6 is the side view of Fig. 4.
Embodiment
Referring to Fig. 1, portable flue gas constant temperature dilution sampling analyzer of the present invention comprises the link 16 that sampling thief is connected with the floss hole ring flange, flue gas dilution tunnel 6 and chamber 12.
Described flue gas dilution tunnel 6 is a straight tube, comprises the shower nozzle 5 with three nozzles, trunk line 7.Described three nozzles 5 120 degree of being separated by are arranged, to guarantee can to enter trunk line 7 uniformly with enough flows through the pure air of air cleaner 14.One end of trunk line 7 is connected with one 90 degree elbow 9, is provided with in this elbow and receives head piece 10, and its end is connected with four thief hatchs 11, and each thief hatch is connected with chamber 12 respectively by pipeline.During use, four thief hatchs can determine to use number according to the species number of being sampled, and when only using two thief hatchs, two other thief hatch can be blocked, and can connect chamber 12.
Described receipts head piece 10 is in order to overcome because trunk line 7 is turned, and the bulky grain thing in the gas is because inertia effect is inevitable assembles to the pipeline outside, and the size distribution of the particle in the gas in the time of causing sampling changes, and makes sampling inaccurate and design.The degree of mixing of gas is by the Reynolds number decision of gas, and the Reynolds number formula is as follows:
Re＝ρdu/μ
u＝4Q/πd
2
Re＝4Q?ρ/πdμ
In the formula: the Re-Reynolds number
ρ-gas density
The d-pipe diameter
Gas speed in the u-pipeline
μ-gas viscosity coefficient
Gas flow in the Q-pipeline
The receipts head piece of the present invention's design, the bore of pipeline has been reduced 1/2, so just make the Reynolds number of gas become big one times, particle in the gas is further fully mixed, big particle diameter particle can not caused damage because of the pipeline factor of dilution tunnel, just can make flue gas, the gas collection of dilute sample, analysis rationalize more, and the calculating of assurance emission factor and the foundation of mathematical model are more accurate.Trunk line is very high the Reynolds number design of when design, and gas is in turbulence state in pipeline, can guarantee that mixed flue gas and carrier gas fully mix after diluting trunk line entering; Flue gas is through fully mixing, and the dilution back sucks chamber by sample tap, and unnecessary carrier gas is taken away by big flow blower fan.
Referring to Fig. 2 and Fig. 3, described chamber 12 comprises reduced diameter portion 19, end bucket 22 with by clip 20 with the stop chamber 21 that reduced diameter portion 19 is connected with end bucket 22, particle cutting head 23 is housed in the end bucket 22.Install collection PM additional according to different sampling requests
10, PM
2.5With the particle cutting head 23 of TSP, adopt Wen Qiuli pipe 37 control streams.It is detachable to stop chamber 21, and reduced diameter portion 19 directly is connected with end bucket 22 by clip 20, can gather the aerosol sample without stop, when needs collection during through the aerosol sample of stop, loads onto stop chamber 21 and gets final product.Can only gather the shortcoming that stops the back sample thereby changed traditional chamber, can gather, carry out the analysis of particle nucleation process without the aerosol sample after stopping and stopping.
The tradition dilution tunnel the chamber volume very big, be not easy to the transportation and field sampling, therefore, the design the chamber of miniaturization.
Referring to Fig. 5 and Fig. 6, described link 16 comprises front plate 29, rear plate 34, U-shaped card 30 between forward and backward clamping plate 29,34 and the bolt 33 that is connected above-mentioned three.During installation, the sampling pipe 2 that will have isokinetic sampling 1 is put into the hole of the flue flange dish 36 that is installed on the walling of flue 35, U-shaped card 30 ring flange 36 surfaces that recline are sleeved on the sampling pipe 2, and rear plate 34 reclines the another side of ring flange 36 with nut 28 fastening getting final product.Rear plate 34 is provided with spacing jackscrew 32, and an end of jackscrew is provided with limiting plate 31.This jackscrew can be with the distance adjustment between two clamping plate to the scope that is fit to flange thickness, can avoid forward and backward clamping plate stressed after, the horizontal positioned of sampling pipe is finally guaranteed in sampling pipe 2 issuable inclinations, isokinetic sampling 1 is parallel in the flue gas direction.Because sampling pipe is a stainless steel material, be connected firmly with employing between the dilution tunnel, so the clamping plate of such design not only can guarantee the level of sampling pipe.Also fixed the position of dilution tunnel, guaranteed can not change because of the mobile level of sampling pipe and the vertical position of causing of dilution tunnel.
Referring to Fig. 1 and Fig. 4, for guaranteeing the accurate position of dilution tunnel in the sampling process, the present invention is provided with two bracing frames 18.Each bracing frame 18 comprises base 24 with roller and the support post 25 that is installed on the base respectively.Described column 25 is provided with the active card ring seat 26 that can move up and down on column, have the semicircle snap ring 27 of two mutual hinges on the snap ring seat.Insert in two semicircle snap rings 27 during installation, with dilution tunnel and use bolt, adjust collar seat 26 then dilution tunnel and sampling pipe 2 are remained on the same horizontal line, with bolt collar seat.
For guaranteeing to be sampled the detected temperatures of gas, analyzer of the present invention also is provided with air preheater 13, and this air preheater 13 is arranged on before the air cleaner 14 that is connected with shower nozzle 5, with the temperature of assurance clean air in 20 ± 5 ℃ of scopes.When ambient air temperature is higher, reduce the gas temperature that enters air cleaner, when ambient air temperature was low, raising entered the gas temperature of air cleaner, further reaches the purpose of regulating system gas temperature.Outside air cleaner 14, dilution tunnel 6, chamber 12 and their connecting tube thermal insulating warm-keeping layer is set, carries out adiabatic heat-insulation with glass silk floss, the temperature of the mixed gas after guaranteeing to dilute is about 25 ℃.
The stationary source pollutant exists with aerocolloidal form in discharge process, and temperature forms gasoloid and has a significant impact.The tradition dilution tunnel does not have humidity control system in the flue gas dilution process, therefore, can not guarantee the repeatability and the accuracy of sampling, and to later data processing, the calculating of emission factor and the foundation of mathematical model cause difficulty.At this shortcoming, the present invention has increased humidity control system.This system comprises temperature sensor 17 and the pressure unit 4 that is installed on the Venturi tube 3, by computer supervisory control system control 15.Adjustment is by air preheater 13, and the temperature that guarantees clean air is in 20 ± 5 ℃ of scopes, and the temperature sensor effect is the temperature in the monitoring pipeline.The effect of pressure unit is to measure the flow that the pressure at Venturi tube two ends is determined flue gas.
By regulating the temperature of the whole carrier gas of pure air adjustment that air cleaner flows out, the carrier gas temperature is remained on about 25 ℃, unified sample temperature, guaranteed the repeatability of sampling precision, sampling, the emission factor that calculates like this has more comparability.
Claims (10)
1, portable flue gas constant temperature dilution sampling analyzer, comprise the link (16) that sampling thief is connected with the floss hole ring flange, flue dilution tunnel (6) and chamber (12), it is characterized in that described link (16) comprises front plate (29), rear plate (34), U-shaped card (30) between forward and backward clamping plate and the bolt that is connected above-mentioned three (31), its rear plate (34) is provided with spacing jackscrew (32); Described flue dilution tunnel (6) is a straight tube, comprise shower nozzle (5) and trunk line (7) with three nozzles, one end of trunk line (7) is connected with one 90 degree elbow (9), be provided with in this elbow and receive head piece (10), its end is connected with four thief hatchs (11), and each thief hatch is connected with a chamber (12) respectively by pipeline.
2, analyzer according to claim 1, the small end bore that it is characterized in that described receipts head piece (10) is 1: 2 with the ratio in large port footpath.
3, analyzer according to claim 1 and 2, it is characterized in that described chamber (12) comprises reduced diameter portion (19), end bucket (22) and the stop chamber (21) that is connected with end bucket (22) by clip (20) and reduced diameter portion (19) are equipped with particle cutting head (23) in the bucket.
4, analyzer according to claim 3 is characterized in that also being provided with air preheater (13), and this air preheater is arranged on the air cleaner (14) that is connected with shower nozzle (5) before.
5, analyzer according to claim 3 is characterized in that chamber (12) and their connecting tube are provided with thermal insulating warm-keeping layer outward in air cleaner (14), dilution tunnel (6).
6, analyzer according to claim 4 is characterized in that outside air cleaner (14), dilution tunnel (6), chamber (12) and their connecting tube thermal insulating warm-keeping layer being set.
7, analyzer according to claim 5 is characterized in that also having humidity control system, and this system comprises temperature sensor (17) and the pressure unit (4) that is arranged on the Venturi tube (3), is controlled by computer supervisory control system.
8, analyzer according to claim 6 is characterized in that also having humidity control system, and this system comprises temperature sensor (17) and the pressure unit (4) that is arranged on the Venturi tube (3), is controlled by computer supervisory control system.
9, analyzer according to claim 7, it is characterized in that also being provided with two bracing frames (18), this bracing frame (18) comprises the base (24) with roller and is installed in support post (25) on the base, described column (25) is provided with active card ring seat (26), has the semicircle snap ring (27) of two mutual hinges on the snap ring seat.
10, analyzer according to claim 8, it is characterized in that also being provided with two bracing frames (18), this bracing frame (18) comprises the base (24) with roller and is installed in support post (25) on the base, described column (25) is provided with active card ring seat (26), has the semicircle snap ring (27) of two mutual hinges on the snap ring seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100568868A CN1320345C (en) | 2004-08-27 | 2004-08-27 | Portable flue gas constant temperature dilution sampling analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100568868A CN1320345C (en) | 2004-08-27 | 2004-08-27 | Portable flue gas constant temperature dilution sampling analyzer |
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| CN1587957A CN1587957A (en) | 2005-03-02 |
| CN1320345C true CN1320345C (en) | 2007-06-06 |
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| CNB2004100568868A Expired - Fee Related CN1320345C (en) | 2004-08-27 | 2004-08-27 | Portable flue gas constant temperature dilution sampling analyzer |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353565B (en) * | 2011-07-04 | 2016-06-08 | 上海电力学院 | Ash-free smoke sampling device |
| CN103033411B (en) * | 2012-12-20 | 2015-04-29 | 中国人民解放军第三军医大学 | Smoke diluting device |
| CN103091134B (en) * | 2013-01-09 | 2015-08-12 | 北京工业大学 | Stationary source particle and volatile organic matter diluting and sampling system and the method for sampling |
| CN103323292A (en) * | 2013-06-09 | 2013-09-25 | 上海大学 | Acquisition system for collecting particles of different particle size discharged by fire coal |
| CN104075913B (en) * | 2014-07-17 | 2016-03-02 | 北京航空航天大学 | A kind of fixed-contamination source emission PM2.5 dilution sampling device |
| CN108535066A (en) * | 2018-05-24 | 2018-09-14 | 北京全华环保技术标准研究中心 | A kind of detection sampling platform of the civilian Discharged form Coal Combustion factor |
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| US4361028A (en) * | 1980-02-22 | 1982-11-30 | Nippon Soken, Inc. | System for measuring particulate discharge from vehicular internal combustion engine |
| US5058440A (en) * | 1990-09-04 | 1991-10-22 | Caterpillar Inc. | Gas sampling device and dilution tunnel used therewith |
| US5237881A (en) * | 1992-02-21 | 1993-08-24 | Anarad, Inc. | Inertial dilution filter probe |
| US5458010A (en) * | 1991-11-12 | 1995-10-17 | United Sciences, Inc. | Vacuum dilution extraction gas sampling system |
| JP2003344238A (en) * | 2002-05-20 | 2003-12-03 | Caterpillar Inc | Dilution tunnel |
| CN1514220A (en) * | 2003-08-19 | 2004-07-21 | 南开大学 | Flue gas diluting and mixing multipath progressive sampler |
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2004
- 2004-08-27 CN CNB2004100568868A patent/CN1320345C/en not_active Expired - Fee Related
Patent Citations (7)
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|---|---|---|---|---|
| US4361028A (en) * | 1980-02-22 | 1982-11-30 | Nippon Soken, Inc. | System for measuring particulate discharge from vehicular internal combustion engine |
| US5058440A (en) * | 1990-09-04 | 1991-10-22 | Caterpillar Inc. | Gas sampling device and dilution tunnel used therewith |
| US5458010A (en) * | 1991-11-12 | 1995-10-17 | United Sciences, Inc. | Vacuum dilution extraction gas sampling system |
| US5237881A (en) * | 1992-02-21 | 1993-08-24 | Anarad, Inc. | Inertial dilution filter probe |
| JP2003344238A (en) * | 2002-05-20 | 2003-12-03 | Caterpillar Inc | Dilution tunnel |
| CN1514220A (en) * | 2003-08-19 | 2004-07-21 | 南开大学 | Flue gas diluting and mixing multipath progressive sampler |
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Non-Patent Citations (1)
| Title |
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| 机动车排放颗粒物采集分析系统的开发 刘红杰等，现代科学仪器，第6期 2001 * |
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