CN203798636U - Dual-pump flow-equalizing flue gas sampling device - Google Patents
Dual-pump flow-equalizing flue gas sampling device Download PDFInfo
- Publication number
- CN203798636U CN203798636U CN201420011209.3U CN201420011209U CN203798636U CN 203798636 U CN203798636 U CN 203798636U CN 201420011209 U CN201420011209 U CN 201420011209U CN 203798636 U CN203798636 U CN 203798636U
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- Prior art keywords
- flue gas
- mixing tank
- sampling
- pump
- fairlead
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- Expired - Fee Related
Links
- 239000003546 flue gas Substances 0.000 title claims abstract description 123
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 238000005070 sampling Methods 0.000 title claims abstract description 63
- 239000000779 smoke Substances 0.000 claims description 41
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 13
- 239000001301 oxygen Substances 0.000 abstract description 13
- 229910052760 oxygen Inorganic materials 0.000 abstract description 13
- 238000005259 measurement Methods 0.000 abstract description 10
- 239000007789 gas Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model discloses a dual-pump flow-equalizing flue gas sampling device which comprises a flue gas mixing tank, wherein a flue gas sampling gun and a flue gas lead-out pipe which are communicated with the flue gas mixing tank are arranged on the flue gas mixing tank; a lead-out end of the flue gas lead-out pipe is connected with a pump I; a branch connected with a flue gas analyzer is guided out of the flue gas lead-out pipe; a throttling device is arranged at one end, which is communicated with the flue gas mixing tank, of the flue gas sampling gun; a filter is arranged on the flue gas lead-out pipe. The flue gas flow at each measuring hole in a single sampling gun is equalized, and the accuracy of oxygen content measurement in the flue gas is improved.
Description
Technical field
The utility model specifically discloses a kind of double pump current-sharing flue gas sampling device.
Background technology
In station boiler thermal test process, usually need flue gas oxygen content to measure.But boiler back end ductwork sectional dimension is very large, flue gas laterally mixes poor in back-end ductwork, and lamination is serious, and this causes flue gas oxygen content skewness on flue cross section.Therefore, national Specification adopts grid survey flue gas oxygen content.As shown in Figure 1, the flue gas of being got by each sampling gun enters in flue gas mixing tank and by pump, is introduced in flue gas analyzer and measured after mixing the method for grid survey flue gas oxygen content.
In actual measurement, find this some problem below measuring system existence.
The one, flute type tubular type sampling gun can not guarantee that the flue gas flow of each thief hole of sampling gun is identical.As shown in Figure 2, flute type tubular type smoke sampling rifle is along the identical thief hole of the uniform a plurality of diameters of stopple coupon, and externally, under suction force effect, flue gas enters smoke sampling rifle from each aperture.From associated fluid mechanics principle, aperture is the closer to sampling gun tail end, and in aperture, negative pressure is less, and the flue gas differential pressure inside and outside aperture is less, and flue gas flow is also less.That is, the flue gas flow of the thief hole of diverse location is different, and because each aperture is got exhaust gas volumn difference, the representative variation that it mixes rear flue gas oxygen content, exists relatively large deviation between measurement result and actual oxygen level.
The 2nd, the on-way resistance of every sampling gun place sampling slip is different, makes the exhaust gas volumn of each sampling gun different, as shown in Figure 1.Enter the exhaust gas volumn difference of each branch road of mixing tank.Thereby the representative variation that causes mixing oxygen level in rear flue gas, measurement result further departs from actual oxygen level.
The 3rd, during flue gas analyzer Measurement accuracy, flue gas flow is had to certain requirement, be limited by this requirement, often can not select the pump that flow is larger, this causes pump not enough to the suction force of flue gas, thereby make the impact of the resistance of ducting more obvious, increased the weight of the problem of each measured hole flue gas flow inequality of gridding method.
Utility model content
For overcoming the above problems, the utility model provides double pump current-sharing flue gas sampling device, can realize each measured hole flue gas flow even, can solve single pump in existing apparatus flue gas is aspirated to hypodynamic problem simultaneously, realizes Measurement accuracy.
The technical solution adopted in the utility model is as follows:
A kind of double pump current-sharing flue gas sampling device, comprise flue gas mixing tank, described flue gas mixing tank is provided with smoke sampling rifle and the flue gas fairlead communicating with it, and the exit of described flue gas fairlead is connected with a pump I, at flue gas fairlead, also draws the branch road that is connected with flue gas analyzer; Described smoke sampling rifle is provided with restriction device with one end that flue gas mixing tank communicates, and on described flue gas fairlead, is provided with filtrator.
Described smoke sampling rifle is provided with the direction along sampling gun head end to tail end, the thief hole that diameter increases gradually.
Described filtrator is comprised of two-layer nonwoven filter core ash handling equipment and discolour silica gel absorption type dehydrating unit.
On the branch road being connected with flue gas analyzer at described flue gas fairlead, be provided with a pump II.
Wherein pump I is main air pump, and pump II is fore pump, and main air pump and fore pump are used in conjunction with, and main air pump, for whole flow of flue gas provides enough suction forces, makes flue gas flow rate reach rational scope; Fore pump is introduced flue gas analyzer by the part of smoke in flue gas fairlead.The type selecting of two pumps needs mutually to coordinate, and meets the requirement of analyser Measurement accuracy to guarantee to enter the flue gas flow of flue gas analyzer.
The course of work of the present utility model is as follows:
Smoke sampling rifle is stretched in boiler back end ductwork, and flue gas enters sampling gun by thief hole, due to the special construction of gradual change hole smoke sampling rifle, can guarantee the flue gas flow uniformity in each hole.The smoke gas flow of collecting in smoke sampling rifle enters flue gas mixing tank through smoke tube, and each smoke tube is designed to equal length, by regulating restriction device to make to enter each branch road flue gas flow of mixing tank in full accord.By the collocation of restriction device and gradual change hole smoke sampling rifle, just can guarantee the flue gas flow uniformity of each thief hole of gridding method, greatly improve the representativeness of the flue gas of getting.The flue gas that sampling gun is got fully mixes in flue gas mixing tank, by flue gas fairlead, after filter ash disposal dehumidifying, flows to air pump, and under the effect of fore pump, the part of smoke mixing enters flue gas analyzer.
In this measurement mechanism, adopt gradual change hole smoke sampling to sit for an examination in place of another person for flute type tubular type smoke sampling rifle, again by adjusting restriction device, can make the flue gas flow in all smoke samplings hole in gridding method in full accord simultaneously, greatly improve the representativeness of whole smoke sampling flue gas that system is got and the accuracy that Oxygen Amount in Flue Gas is measured.Meanwhile, with double pump, replace single pump can solve suction force deficiency and limit the contradiction between flue gas flow.Main air pump provides enough suction forces for flow of flue gas, and fore pump provides Measurement accuracy required flue gas flow for flue gas analyzer, and flue gas analyzer is worked and improved equally the accuracy of measuring under suitable flue gas flow.
The beneficial effects of the utility model are:
The use of 1 gradual change hole smoke sampling rifle has realized the equilibrium of each measured hole flue gas flow on single sampling gun, has improved the accuracy that Oxygen Amount in Flue Gas is measured.
On 2 flue gas mixing tanks, the use of restriction device has realized the consistent of each smoke sampling rifle flue gas flow, has further improved the accuracy that Oxygen Amount in Flue Gas is measured.
The use of 3 double pumps can provide enough suction forces for system, also can guarantee that flue gas analyzer can measure under optimum flue gas flow simultaneously, has further guaranteed the accuracy that Oxygen Amount in Flue Gas is measured.
Accompanying drawing explanation
The former gridding method smoke sampling of Fig. 1 schematic diagram;
The former flute type of Fig. 2 tubular type smoke sampling rifle schematic diagram;
Fig. 3 is the schematic diagram of double pump current-sharing flue gas sampling device;
Fig. 4 gradual change hole smoke sampling rifle schematic diagram;
In figure: 1-smoke sampling rifle; 2-smoke tube; 3-restriction device; 4-flue gas mixing tank; 5-flue gas fairlead; 6-filtrator; 7-fore pump; 8-flue gas analyzer; The main air pump of 9-, 10 sampling gun tail ends, 11 thief holes, 12 sampling gun head ends.
Embodiment
Below in conjunction with accompanying drawing, the utility model is elaborated:
Fig. 3 is the schematic diagram of double pump current-sharing flue gas sampling device.This device comprises that smoke sampling rifle 1, smoke tube 2, restriction device 3, flue gas mixing tank 4, flue gas fairlead 5, filtrator 6, fore pump 7, flue gas analyzer 8 and main air pump 9 form.
Flue gas mixing tank 4 is provided with smoke sampling rifle 1 and the flue gas fairlead 5 communicating with it, and the exit of described flue gas fairlead 5 is connected with a main air pump 9, at flue gas fairlead 5, also draws the branch road that is connected with flue gas analyzer 8; One end communicating with flue gas mixing tank 4 of described smoke sampling rifle 1 is provided with restriction device 3, on described flue gas fairlead 5, is provided with filtrator 6.
Smoke sampling rifle 1 as shown in Figure 4, arrives the direction of sampling gun tail end 10 along sampling gun head end 12, thief hole 11 diameters increase gradually.From fluid mechanics knowledge, aperture is the closer to sampling gun tail end 10, in aperture, negative pressure is less, and the flue gas differential pressure inside and outside aperture is less, and flue gas flow rate is also just less, if the aperture of each point equates, just less the closer to the flue gas flow of the thief hole 11 of sampling gun tail end 10, therefore, for the flue gas flow in each hole is equated, we increase the diameter near the thief hole of tail end, so just the flue gas flow in balanced each hole of energy.The diameter in each hole can calculate acquisition by resistance.With gradual change hole smoke sampling rifle, replace common flute type tubular type sampling gun can guarantee that the flue gas flow of each thief hole of the body of a gun is consistent.
Smoke tube 2 is stainless steel mesh grid snakeskin hoses, and the flue gas of collecting in smoke sampling rifle 1 enters flue gas mixing tank 4 by smoke tube 2, and two ends adopt and are tightly connected, and guarantees without Air infitration.
Restriction device 3 is between smoke tube and flue gas mixing tank, and effect is by regulating it to carry out the resistance to flow of balanced each sampling gun branch road, to guarantee that the exhaust gas volumn of getting from each sampling gun is identical.After connecting smoke tube and mixing tank, on experiment table, aspirate test, by anemometer, measure the wind speed of each smoke tube entrance, if there is relatively large deviation, adjust restriction device, until each smoke tube inlet flow rate is in full accord.The use of restriction device can guarantee that the exhaust gas volumn that each sampling gun gets is balanced consistent.
Flue gas mixing tank 4 can make the flue gas that each sampling gun is got fully mix therein, and the flue gas mixing is drawn through flue gas fairlead.
Filtrator is comprised of two-layer nonwoven filter core ash handling equipment and discolour silica gel absorption type dehydrating unit, and it can guarantee flue gas analyzer safety, Measurement accuracy thereafter, has improved the running environment of two pumps below simultaneously.
Claims (3)
1. a double pump current-sharing flue gas sampling device, comprise flue gas mixing tank, described flue gas mixing tank is provided with smoke sampling rifle and the flue gas fairlead communicating with it, it is characterized in that: the exit of described flue gas fairlead is connected with a pump I, at flue gas fairlead, also draw the branch road that is connected with flue gas analyzer; Described smoke sampling rifle is provided with restriction device with one end that flue gas mixing tank communicates, and on described flue gas fairlead, is provided with filtrator; On the branch road being connected with flue gas analyzer at described flue gas fairlead, be provided with a pump II.
2. device as claimed in claim 1, is characterized in that: described smoke sampling rifle is provided with the direction along sampling gun head end to tail end, the thief hole that diameter increases gradually.
3. device as claimed in claim 1, is characterized in that: described filtrator is comprised of two-layer nonwoven filter core ash handling equipment and discolour silica gel absorption type dehydrating unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420011209.3U CN203798636U (en) | 2014-01-08 | 2014-01-08 | Dual-pump flow-equalizing flue gas sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420011209.3U CN203798636U (en) | 2014-01-08 | 2014-01-08 | Dual-pump flow-equalizing flue gas sampling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203798636U true CN203798636U (en) | 2014-08-27 |
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ID=51380841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420011209.3U Expired - Fee Related CN203798636U (en) | 2014-01-08 | 2014-01-08 | Dual-pump flow-equalizing flue gas sampling device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203798636U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674631A (en) * | 2014-01-08 | 2014-03-26 | 国家电网公司 | Dual-pump flow-equalizing flue sampling device and sampling method |
| CN104729889A (en) * | 2015-03-10 | 2015-06-24 | 国家电网公司 | Synchronous fume sampling system and method thereof |
| CN104807680A (en) * | 2015-04-23 | 2015-07-29 | 哈尔滨工程大学 | Flue gas multipoint sampling device |
| CN109556928A (en) * | 2018-11-30 | 2019-04-02 | 国网山东省电力公司电力科学研究院 | A kind of fly ash sampling device and its operating method and its calibration measuring method |
| CN112540151A (en) * | 2019-09-23 | 2021-03-23 | 中国石油天然气集团有限公司 | Device and method for detecting volatile gas in medium |
-
2014
- 2014-01-08 CN CN201420011209.3U patent/CN203798636U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674631A (en) * | 2014-01-08 | 2014-03-26 | 国家电网公司 | Dual-pump flow-equalizing flue sampling device and sampling method |
| CN103674631B (en) * | 2014-01-08 | 2016-05-04 | 国家电网公司 | Double pump current-sharing flue gas sampling device and sampling method |
| CN104729889A (en) * | 2015-03-10 | 2015-06-24 | 国家电网公司 | Synchronous fume sampling system and method thereof |
| CN104729889B (en) * | 2015-03-10 | 2017-08-25 | 国家电网公司 | A kind of synchronous smoke sampling system and method |
| CN104807680A (en) * | 2015-04-23 | 2015-07-29 | 哈尔滨工程大学 | Flue gas multipoint sampling device |
| CN104807680B (en) * | 2015-04-23 | 2017-06-20 | 哈尔滨工程大学 | Flue gas multidraw device |
| CN109556928A (en) * | 2018-11-30 | 2019-04-02 | 国网山东省电力公司电力科学研究院 | A kind of fly ash sampling device and its operating method and its calibration measuring method |
| CN109556928B (en) * | 2018-11-30 | 2022-03-18 | 国网山东省电力公司电力科学研究院 | Fly ash sampling device, operation method thereof and calibration measurement method thereof |
| CN112540151A (en) * | 2019-09-23 | 2021-03-23 | 中国石油天然气集团有限公司 | Device and method for detecting volatile gas in medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140827 Termination date: 20200108 |
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| CF01 | Termination of patent right due to non-payment of annual fee |