CN105466735A - Smoke dust sampling and testing method applied to high-moisture-content low-dust-content system - Google Patents
Smoke dust sampling and testing method applied to high-moisture-content low-dust-content system Download PDFInfo
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- CN105466735A CN105466735A CN201511028879.1A CN201511028879A CN105466735A CN 105466735 A CN105466735 A CN 105466735A CN 201511028879 A CN201511028879 A CN 201511028879A CN 105466735 A CN105466735 A CN 105466735A
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- Prior art keywords
- sampling
- dust
- filter cylinder
- housing
- tapered sleeve
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N1/2258—Sampling from a flowing stream of gas in a stack or chimney
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
Abstract
The invention discloses a smoke dust sampling and testing method applied to a high-moisture-content low-dust-content system and belongs to the field of gas detection. The smoke dust sampling and testing method adopts a sampling gun, a drying device and a smoke sampling instrument which are connected in sequence. When sampling and testing are performed, the sampling time of the sampling gun is more than 4 hours according to the demand. The drying device consists of a gas-water separator and a dryer, wherein smoke passes through the gas-water separator from a tail portion sampling pipe of the sampling gun and then flows into the dryer from a meshy inlet, a discharging port is formed in the bottom of the gas-water separator, and the water storage volume of the gas-water separator meets the condensed water storage requirement for continuous 8-hour exhausting. The problem that a filter cylinder in the prior art is easily damaged and the measurement accuracy is slightly low during dust content measurement of high-moisture-content low-concentration smoke containing various corrosive acids is solved.
Description
Technical field
The invention belongs to field of gas detection, the sampling particularly relating to flue gas detects.
Background technology
Along with 2014, the Committee of Development and Reform, Bureau of Energy, ministries and commissions of Chinese Ministry of Environmental Protection three combine the proposition of issue " coal electricity energy-saving and emission-reduction upgrading and transformation action plan (2014-2020) ", " ultra-clean discharge " becomes the emission limit of thermal power plant's new round, more and more higher to the dustiness restriction of coal-burning boiler, in order to grasp the operation emission behaviour of dust arrester, just sampling and testing must be carried out to the flue gas in discharge flue.The performance how detecting various minimum discharge cleaner has become a difficult problem.
At present, coal-burning boiler " ultra-clean discharge " major part installs WESP wet dust separater additional after wet desulphurization, and in flue gas, water capacity is bigger than normal, and outlet dust content is at 5mg/Nm
3the sour gas such as the HCL/HF containing trace below and in flue gas, propose very large requirement to except dust detection device.
At present, there is sampling error large, the shortcomings such as filter cylinder is fragile in traditional sampling and testing system and method.Therefore develop and be a set ofly applicable to high water capacity, the sampling and testing method of low dust-laden system testing is extremely necessary.
Summary of the invention
The object of the invention is to: a kind of sampling and testing method for high water capacity, low dust-laden system testing is provided, solve high water capacity that prior art exists, low concentration and there is various acid corrosion dust contained flue gas measurement of concetration in filter cylinder destructible and measurement accuracy problem on the low side.
The object of the invention is realized by following technical proposals:
One is applied to high water capacity, the flue dust sampling and testing method of low dust-laden system, comprise the sampling gun connected successively, drying device and flue gas sampling instrument, sampling gun comprises afterbody stopple coupon, inlet tube, housing, porous interlayer, filter cylinder, tapered sleeve and gland, cavity is provided with in housing, and front and back end is respectively equipped with and the air intake opening of cavity connects and gas outlet, air intake opening is connected inlet tube by tapered sleeve with gland, gas outlet connects afterbody stopple coupon, inlet tube front end is 90 ° of arc-shaped bends, filter cylinder is located in housing hollow, filter cylinder adopts quartz glass material, and be nested with porous interlayer outside filter cylinder, porous interlayer is distributed with some holes, bore dia 1-6mm, percentage of open area 10% ~ 40%, the medial surface of tapered sleeve and shell air inlet close contact is tapered, tapered sleeve tapering point external diameter and filter cylinder internal diameter quite ensure to fit with filter cylinder, tapered sleeve front end external diameter and housing outer diameter quite ensure to fit with housing, and compress the lateral surface of tapered sleeve with the close-connected gland of housing forward end, during sampling and testing, sampling gun need reach more than 4 hours sample time, drying device is made up of moisture trap and exsiccator, flue gas by the afterbody stopple coupon of sampling gun after moisture trap, exsiccator is entered by mesh portal, bottom moisture trap, floss hole is set, and moisture trap retention volume meets the condensate water storage request of bleeding for continuous 8 hours.
As selection, the afterbody stopple coupon of sampling gun is formed by web member link by multistage.
As selection, the inlet tube of sampling gun, housing, porous interlayer and tapered sleeve adopt acid corrosion-resistant material to make.Described acid corrosion refers to coal-burning boiler, HF, HCL, SO of existing in the flue gas discharged from coal-fired boiler of particularly power plant
2and other acid corrosions.As selection, acid corrosion-resistant material is polytetrafluoroethylmaterial material.
The main scheme of aforementioned the present invention and each further selection scheme thereof can independent assortment to form multiple scheme; be the present invention can adopt and claimed scheme: as the present invention; each selection can select combination in any with other; those skilled in the art can understand there is multiple combination according to prior art and common practise after understanding the present invention program; be the claimed technical scheme of the present invention, do not do exhaustive at this.
Each parts effect and the course of work thereof are: ash-laden gas is by the inlet tube of sampling gun housing forward end and air intake opening, and enter the filter cylinder in housing, dust is absorbed by filter cylinder, gas through filter cylinder, porous interlayer and gas outlet to afterbody stopple coupon.
Sampling gun inlet tube, tapered sleeve, housing and porous interlayer adopt acid corrosion-resistant material, and preferably polytetrafluoroethylene material, can avoid HF, HCL, SO
2and other acid corrosion problems, if conveniently spray gun adopts stainless steel other materials to make this device, because reasons such as acid corrosions, stainless steel etc. because reason of sampling for a long time produces corrosion thus causes in sampling sample there is more corrosion generation thing, can cause the error of measurement sampling.
Sampling gun absorber portion sleeve used comprises outer field housing, porous interlayer in housing and the filter cylinder in porous interlayer, the gas of turnover filter cylinder can mistake by porous interlayer slowly-releasing and uniform, gas slowly and diffuse to housing internal cavity equably, and then discharge through gas outlet, ensure that dust is absorbed fully by filter cylinder, and the safe and reliable not cracky of filter cylinder itself, ensure that and measure the accurate of sampling.
The porous interlayer of sampling gun, be all covered with aperture in bottom and chuck surrounding, diameter 1-6mm, percentage of open area 10% ~ 40%, diameter is too small or percentage of open area is excessive, can increase difficulty of processing, and processing cost promotes; Too small or the diameter of percentage of open area is excessive all can be caused because high water capacity and bleed for a long time and cause filter cylinder breakage, thus affects test result.
Sampling gun adopts tapered sleeve hermetically-sealed construction, and tapered sleeve mates with filter cylinder, shell dimension, can effectively avoid leaking out, and ash-laden gas enters into afterbody stopple coupon without filter cylinder diameter.
The afterbody stopple coupon of sampling gun, is divided into multistage, links by web member, selects according to test case, can independent assortment, selects length.
In the sampling and testing method of this patent, while the special sampling gun of application, stopple coupon afterbody need connect drying device, in order to measure precise requirements, requires to reach more than 4 hours sample time.Drying device, needs with gas-water separation function, and retention volume should be able to meet continuous condensate water of bleeding for 8 hours.Drying device, is made up of moisture trap and exsiccator, and flue gas, after moisture trap, enters exsiccator by mesh portal; Bottom moisture trap, floss hole is set.By observing the water quality inside moisture trap as above, the quality of intuitive judgment sampling apparatus can be compared; Follow-up flue gas sampling instrument can be protected through gas-water separation simultaneously.
Beneficial effect of the present invention: can effectively solve high water capacity, low dust-laden and acid corrosion systematic sampling test in filter cylinder damage, sample tap corrosion and measure the problems such as inaccurate.
Accompanying drawing explanation
Fig. 1 is the structural representation of the sampling gun of the embodiment of the present invention;
Fig. 2 is the housing of the sampling gun of the embodiment of the present invention and the assembly structure schematic diagram of porous interlayer;
Fig. 3 is the structural representation of the porous interlayer of the sampling gun of the embodiment of the present invention;
Fig. 4 is the structural representation of the tapered sleeve of the sampling gun of the embodiment of the present invention;
Fig. 5 is the device schematic flow sheet of the sampling and testing method of the embodiment of the present invention;
Fig. 6 is the structural representation of the drying device of the embodiment of the present invention;
Wherein 1-housing, 2-porous interlayer, 3-gland, 4-afterbody stopple coupon, 5-inlet tube, 6-filter cylinder, 7-tapered sleeve, 8-hole, 9-air intake opening, 10-gas outlet, 11-flue, 12-sampling gun, 13-drying device, 14-flue gas sampling instrument, 31-gas approach, 32-exhanst gas outlet, 33-netted import, 34-floss hole.
Embodiment
Following non-limiting examples is for illustration of the present invention.
Shown in 6, one is applied to high water capacity, the flue dust sampling and testing method of low dust-laden system, comprise the sampling gun 12 connected successively, drying device 13 and flue gas sampling instrument 14, sampling gun 12 comprises afterbody stopple coupon 4, inlet tube 5, housing 1, porous interlayer 2, filter cylinder 6, tapered sleeve 7 and gland 3, cavity is provided with in housing 1, and front and back end is respectively equipped with and the air intake opening 9 of cavity connects and gas outlet 10, air intake opening 9 is connected inlet tube 5 by tapered sleeve 7 with gland 3, gas outlet 10 connects afterbody stopple coupon 4, filter cylinder 6 is located in housing 1 cavity, filter cylinder 6 adopts quartz glass material, and be nested with porous interlayer 2 outside filter cylinder 6, porous interlayer 2 is distributed with some holes 8, hole 8 diameter 1-6mm, percentage of open area 10% ~ 40%, tapered sleeve 7 is tapered with the medial surface of housing 1 air intake opening 9 close contact, tapered sleeve 7 tapering point external diameter and filter cylinder 6 internal diameter quite ensure to fit with filter cylinder 6, tapered sleeve 7 front end external diameter and housing 1 external diameter quite ensure to fit with housing 1, and compress the lateral surface of tapered sleeve 7 with the close-connected gland 3 in housing 1 front end.As selection, afterbody stopple coupon 4 is formed by web member link by multistage, and inlet tube 5 front end is 90 ° of arc-shaped bends.During sampling and testing, sampling gun 12 need reach more than 4 hours sample time, drying device 13 is made up of moisture trap and exsiccator, flue 11 flue gas by the afterbody stopple coupon 4 of sampling gun 12 after moisture trap, exsiccator is entered by netted import 33, floss hole 34 is set bottom moisture trap, and moisture trap retention volume meets the condensate water storage request of bleeding for continuous 8 hours.As selection, the inlet tube 5 of sampling gun 12, housing 1, porous interlayer 2 and tapered sleeve 7 adopt acid corrosion-resistant material to make.Described acid corrosion refers to coal-burning boiler, HF, HCL, SO2 of existing in the flue gas discharged from coal-fired boiler of particularly power plant and other acid corrosions.As selection, acid corrosion-resistant material is polytetrafluoroethylmaterial material.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. one kind is applied to high water capacity, the flue dust sampling and testing method of low dust-laden system, it is characterized in that: comprise the sampling gun connected successively, drying device and flue gas sampling instrument, sampling gun comprises afterbody stopple coupon, inlet tube, housing, porous interlayer, filter cylinder, tapered sleeve and gland, cavity is provided with in housing, and front and back end is respectively equipped with and the air intake opening of cavity connects and gas outlet, air intake opening is connected inlet tube by tapered sleeve with gland, gas outlet connects afterbody stopple coupon, inlet tube front end is 90 ° of arc-shaped bends, filter cylinder is located in housing hollow, filter cylinder adopts quartz glass material, and be nested with porous interlayer outside filter cylinder, porous interlayer is distributed with some holes, bore dia 1-6mm, percentage of open area 10% ~ 40%, the medial surface of tapered sleeve and shell air inlet close contact is tapered, tapered sleeve tapering point external diameter and filter cylinder internal diameter quite ensure to fit with filter cylinder, tapered sleeve front end external diameter and housing outer diameter quite ensure to fit with housing, and compress the lateral surface of tapered sleeve with the close-connected gland of housing forward end, during sampling and testing, sampling gun need reach more than 4 hours sample time, drying device is made up of moisture trap and exsiccator, flue gas by the afterbody stopple coupon of sampling gun after moisture trap, exsiccator is entered by mesh portal, bottom moisture trap, floss hole is set, and moisture trap retention volume meets the condensate water storage request of bleeding for continuous 8 hours.
2. be applied to the flue dust sampling and testing method of high water capacity, low dust-laden system as claimed in claim 1, it is characterized in that: the afterbody stopple coupon of sampling gun is formed by web member link by multistage.
3. be applied to the flue dust sampling and testing method of high water capacity, low dust-laden system as claimed in claim 1 or 2, it is characterized in that: the inlet tube of sampling gun, housing, porous interlayer and tapered sleeve adopt acid corrosion-resistant material to make.
4. be applied to the flue dust sampling and testing method of high water capacity, low dust-laden system as claimed in claim 3, it is characterized in that: acid corrosion-resistant material is polytetrafluoroethylmaterial material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511028879.1A CN105466735A (en) | 2015-12-31 | 2015-12-31 | Smoke dust sampling and testing method applied to high-moisture-content low-dust-content system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511028879.1A CN105466735A (en) | 2015-12-31 | 2015-12-31 | Smoke dust sampling and testing method applied to high-moisture-content low-dust-content system |
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| CN105466735A true CN105466735A (en) | 2016-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201511028879.1A Pending CN105466735A (en) | 2015-12-31 | 2015-12-31 | Smoke dust sampling and testing method applied to high-moisture-content low-dust-content system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106769246A (en) * | 2016-12-22 | 2017-05-31 | 华电电力科学研究院 | A kind of method and device for power plant sulfur dioxide concentration Site Detection |
| CN108325300A (en) * | 2018-03-01 | 2018-07-27 | 苏州西热节能环保技术有限公司 | A kind of water-dust removing devices and methods therefor in flue gas fast sampling test system |
| CN109030122A (en) * | 2018-08-15 | 2018-12-18 | 山东国舜建设集团有限公司 | Wet flue gas condensation water sampler and method are saturated after a kind of wet desulphurization |
| CN112763279A (en) * | 2020-12-21 | 2021-05-07 | 苏州原核仪表成套有限公司 | Sampling head structure, air pipe structure, sampling head and air pipe type selection method |
| CN112798365A (en) * | 2021-01-04 | 2021-05-14 | 深圳市能源环保有限公司 | Novel waste incineration high temperature flue gas sampling gun |
| CN114383902A (en) * | 2021-11-26 | 2022-04-22 | 国家能源集团新能源技术研究院有限公司 | Tower gas sampling device and tower |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106769246A (en) * | 2016-12-22 | 2017-05-31 | 华电电力科学研究院 | A kind of method and device for power plant sulfur dioxide concentration Site Detection |
| CN108325300A (en) * | 2018-03-01 | 2018-07-27 | 苏州西热节能环保技术有限公司 | A kind of water-dust removing devices and methods therefor in flue gas fast sampling test system |
| CN109030122A (en) * | 2018-08-15 | 2018-12-18 | 山东国舜建设集团有限公司 | Wet flue gas condensation water sampler and method are saturated after a kind of wet desulphurization |
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| CN112763279A (en) * | 2020-12-21 | 2021-05-07 | 苏州原核仪表成套有限公司 | Sampling head structure, air pipe structure, sampling head and air pipe type selection method |
| CN112798365A (en) * | 2021-01-04 | 2021-05-14 | 深圳市能源环保有限公司 | Novel waste incineration high temperature flue gas sampling gun |
| CN114383902A (en) * | 2021-11-26 | 2022-04-22 | 国家能源集团新能源技术研究院有限公司 | Tower gas sampling device and tower |
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Application publication date: 20160406 |
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