CN204694512U - Bleeder flue gas oxygen content on-Line Monitor Device - Google Patents
Bleeder flue gas oxygen content on-Line Monitor Device Download PDFInfo
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- CN204694512U CN204694512U CN201520318433.1U CN201520318433U CN204694512U CN 204694512 U CN204694512 U CN 204694512U CN 201520318433 U CN201520318433 U CN 201520318433U CN 204694512 U CN204694512 U CN 204694512U
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- flue
- air
- cyclone separator
- economizer
- stopple coupon
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Abstract
The utility model discloses a kind of bleeder flue gas oxygen content on-Line Monitor Device, boiler flue is provided with economizer or air preheater, it is characterized in that, this device comprises stopple coupon, described stopple coupon is plugged on the flue of described economizer or air preheater input side, the output terminal of stopple coupon is provided with cyclone separator, by the flying dust in described cyclone separator separation bubble, the air-flow output terminal of cyclone separator connects oxygen amount meter and exhaust tube successively, described exhaust tube is also connected with the pipeline of economizer or air preheater outgoing side, form the bypass of gas flow outside flue thus, this bypass relies on the pressure differential of flue before and after economizer or air preheater to be drawn from flue by air-flow, cyclone separator bottom is also provided with sends the flying dust after being separated back to Luo Hui mechanism in boiler flue.Utilize the economizer in flue or the pressure differential before and after air preheater automatically to be drawn from flue by air-flow, carry out the monitoring of oxygen level in flue outside.
Description
Technical field
The utility model relates to a kind of on-Line Monitor Device of bleeder flue gas content.
Background technology
Coal-fired boiler in thermal power plant flue gas oxygen content also claims excess air coefficient, is the important indicator weighing boiler operatiopn and burning efficiency.Conservative control boiler smoke oxygen level, is conducive to the economy improving boiler and genset operation.At present, thermal power plant generally adopts electrochemical method determining method, is directly plugged in flue by zirconia oxygen analyzer and monitors.This method flying dust existed in sample representation deficiency, flue easily blocks the problems such as conduction hole, oxygen amount meter be easy to wear, easily causes measurement data inaccurate, also shortens service life of equipment.
Utility model content
For problems of the prior art, one of the purpose of this utility model is to provide a kind of bleeder flue gas oxygen content on-line monitoring method, utilize the economizer in flue or the pressure differential before and after air preheater automatically to be drawn from flue by air-flow, carry out the monitoring of oxygen level in flue outside; Two of the purpose of this utility model is to provide a kind of bleeder flue gas oxygen content on-Line Monitor Device realizing said method.
For achieving the above object, the technical solution of the utility model is as follows:
A kind of bleeder flue gas oxygen content on-line monitoring method, in flue arranged outside one bypass to connect the flue before and after economizer or air preheater, before and after relying on, air-flow is drawn by the pressure differential of flue from flue, by the oxygen level in oxygen amount meter on-line monitoring air-flow after cyclone separator ash disposal, and send the flying dust of separation back to flue.
Further, air-flow is drawn by multiple stopple coupon from the same xsect in the flue of described economizer or air preheater input side.
Further, in the below of described cyclone separator, one ash-storing bin is set, described ash-storing bin is provided with the ash tube be connected with the flue of described economizer or air preheater input side, the flying dust be separated in cyclone separator falls under gravity in ash-storing bin, return flue through described ash tube again, ash tube arranges flapper.
Further, described flapper is gravity flapper, and arranges at least two simultaneously, and described gravity flapper has different unlatching threshold values, and wherein, the threshold values near the gravity flapper of described ash-storing bin is always less than the threshold values of the gravity flapper near described flue.
A kind of bleeder flue gas oxygen content on-Line Monitor Device realizing said method, boiler flue is provided with economizer or air preheater, this device comprises stopple coupon, described stopple coupon is plugged on the flue of described economizer or air preheater input side, the output terminal of stopple coupon is provided with cyclone separator, by the flying dust in described cyclone separator separation bubble, the air-flow output terminal of cyclone separator connects oxygen amount meter and exhaust tube successively, described exhaust tube is also connected with the pipeline of economizer or air preheater outgoing side, form the bypass of gas flow outside flue thus, this bypass relies on the pressure differential of flue before and after economizer or air preheater to be drawn from flue by air-flow, cyclone separator bottom is also provided with sends the flying dust after being separated back to Luo Hui mechanism in boiler flue.
Further, described Luo Hui mechanism comprises the ash-storing bin be arranged on below described cyclone separator, described ash-storing bin is provided with the ash tube be connected with the flue of described economizer or air preheater input side, flying dust after isolation falls under gravity in ash-storing bin, return flue through described ash tube again, ash tube arranges flapper.
Further, described flapper is gravity flapper, and arranges at least two simultaneously, and described gravity flapper has different unlatching threshold values, and wherein, the threshold values near the gravity flapper of described ash-storing bin is always less than the threshold values of the gravity flapper near described flue.
Further, be provided with oxygen detection room between described cyclone separator and described exhaust tube, described oxygen amount meter is connected with this oxygen detection room.
Further, described stopple coupon is provided with multiple sample tap, multiple stopple coupon is arranged on the same xsect in described flue.
Further, described stopple coupon is provided with purging pressurized air input port and gas lock section, wherein said gas lock section is near the air-flow input end of described cyclone separator, this gas lock section comprises interior pipe and is nested with the outer tube outside described interior pipe, the closed at both ends of the ring cavity formed between interior pipe and described outer tube, the tube wall pressed on ring of described interior pipe is furnished with the pore of at least one row, described outer tube is provided with gas lock and uses compressed-air actuated input port; Pressurized air is passed into respectively to described purging pressurized air input port and the compressed-air actuated input port of described gas lock, gas lock pressurized air forms gas lock by the described pore of annular arrangement in interior pipe, forces pressurized air to be discharged from described sample tap and purges stopple coupon.
Bleeder flue gas oxygen content on-line monitoring method of the present utility model and device tool have the following advantages: adopt principle of bleeding, and total cross-section samples, and flue gas is representative strong; Flue gas aspirates, detachment dynamic to utilize Negative Pressure Difference before and after the economizer on existing flue or air preheater to provide, reliable; Adopt cyclone centrifugal separation, remove flying dust, ensure that oxygen amount meter uses reliably and with long-term, increase the service life; Utilize pressurized air to purge, prevent stopple coupon from blocking; Reasonable in design, compact conformation, convenient for installation and maintenance; Reasonable in design, compact conformation, convenient for installation and maintenance; Apparatus function easily extensible, can install other flue gas analysis instrument additional.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the utility model bleeder flue gas oxygen content on-Line Monitor Device;
Fig. 2 is the structural representation of the gas lock section on stopple coupon.
Embodiment
Below, with reference to accompanying drawing, the utility model is more fully illustrated, shown in the drawings of exemplary embodiment of the present utility model.But the utility model can be presented as multiple multi-form, and should not be construed as the exemplary embodiment being confined to describe here.But, these embodiments are provided, thus make the utility model comprehensively with complete, and scope of the present utility model is fully conveyed to those of ordinary skill in the art.
For ease of illustrating, here can use such as " on ", the space relative terms such as D score " left side " " right side ", for illustration of the element of shown in figure or the feature relation relative to another element or feature.It should be understood that except the orientation shown in figure, spatial terminology is intended to comprise device different azimuth in use or operation.Such as, if the device in figure is squeezed, be stated as the element being positioned at other elements or feature D score will be positioned at other elements or feature " on ".Therefore, exemplary term D score can comprise upper and lower both orientation.Device can otherwise be located (90-degree rotation or be positioned at other orientation), and space used here illustrates relatively can correspondingly explain.
A kind of bleeder flue gas oxygen content on-line monitoring method, the flue before and after economizer or air preheater is connected in arranged outside one bypass of flue, owing to arranging economizer or air preheater can make to form pressure reduction in the flue of front and back on flue, namely the flue internal gas pressure of economizer or air preheater input side is greater than the air pressure in the flue of economizer or air preheater outgoing side.Before and after relying on, air-flow is drawn by the pressure differential of flue from flue, the flying dust mixed in air-flow after extraction enters cyclone separator, by the oxygen level in oxygen amount meter on-line monitoring air-flow after cyclone separator ash disposal, send flue back to by the flying dust after cyclone separator is separated.
When arranging bypass, in the flue of economizer or air preheater input side, draw air-flow by multiple stopple coupon, preferably in flue, same xsect draws air-flow.
In the below of cyclone separator, one ash-storing bin is set, ash-storing bin is provided with the ash tube be connected with the flue of economizer or air preheater input side, the flying dust be separated in cyclone separator falls under gravity in ash-storing bin, flue is returned again through described ash tube, ash tube arranges flapper, to avoid crossfire, flapper is preferably gravity flapper, and arrange at least two simultaneously, gravity flapper has different unlatching threshold values, threshold values near the gravity flapper of ash-storing bin is always less than the threshold values of the gravity flapper near flue, at least one gravity flapper is made to be closed.
Illustrate a kind of bleeder flue gas oxygen content on-Line Monitor Device that can realize said method as depicted in figs. 1 and 2.As can be seen from the figure, air preheater 11 is arranged on flue 10, flue gas is carried in the direction of the arrow, stopple coupon 12 is plugged on the flue 10 of air preheater 11 input side, stopple coupon 12 can arrange one and also can arrange multiple, and each stopple coupon 12 is provided with sample tap, and sample tap can arrange one and also can arrange multiple, the quantity of stopple coupon 12 and sample tap can be determined as required, and the air-flow of the more collections of quantity is more representative.If when arranging multiple stopple coupon 12, stopple coupon 12 is distributed on the same xsect in flue 10.
The output terminal of stopple coupon 12 is provided with cyclone separator 5, by the flying dust in cyclone separator 5 separation bubble, at the air-flow output terminal of cyclone separator 5, oxygen detection room 3 is set, oxygen detection room 3 is provided with oxygen amount meter 4, detected by the oxygen level of air-flow in oxygen amount meter 4 pairs of oxygen detection rooms 3, the output terminal of oxygen detection room 3 arranges one section of expansion bellow 2, exhaust tube 1 is connected by expansion bellow 2, the end of exhaust tube 1 is connected with the pipeline 10 of air preheater 11 outgoing side, exhaust tube 1 is provided with blowdown valve 9.Cyclone separator 5 bottom is also provided with sends the flying dust after being separated back to Luo Hui mechanism in boiler flue, Luo Hui mechanism comprises the ash-storing bin be arranged on below cyclone separator 5, ash-storing bin is provided with the ash tube 8 be connected with the flue 10 of air preheater 11 input side, ash tube 8 is arranged two flappers 6,7, flapper 6,7 is gravity flapper, and there is different unlatching threshold values, the threshold values near the flapper 6 of ash-storing bin is less than the threshold values of the flapper 7 near flue 10.
Stopple coupon 12 is provided with purging pressurized air input port 16 and gas lock section, with reference to figure 2, wherein gas lock section is near the air-flow input end of cyclone separator 5, the outer tube 14 that this gas lock section comprises interior pipe 13 and is nested with outside pipe 13, the two ends of the ring cavity formed between interior pipe 13 and outer tube 14 are closed by flange 18, flange 18 is used for connecing stopple coupon 12 simultaneously, and the tube wall pressed on ring of interior pipe 13 is furnished with the pore 15 of 4 rows, outer tube 14 is provided with the compressed-air actuated input port 17 of gas lock; Pass into pressurized air respectively to purging pressurized air input port 16 and the compressed-air actuated input port 17 of gas lock, gas lock pressurized air forms 4 road gas locks by pore 15 in interior pipe 13, and pressurized air is discharged from sample tap, purges stopple coupon 12.
When monitoring, stopple coupon 12 relies on the pressure differential before and after air preheater 11, air-flow in flue 10 is drawn, enter cyclone separator 5, air-flow is in cyclone separator 5 gas solid separation, flying dust in air-flow is deposited in the ash-storing bin of bottom, air-flow after separation enters oxygen detection room 3 by cyclone separator 5 top, oxygen content is measured by the oxygen amount meter 4 being arranged on oxygen detection room 3, gas is being got back in flue 10 along exhaust tube 1 behind oxygen detection room 3, after dust stratification in ash-storing bin reaches the gravity threshold values of the flapper 6 of the first order, flapper 6 is opened dust stratification and is fallen, flapper 6 closes, the dust stratification fallen flapper 7 after the gravity threshold values of flapper 7 reaching the second level is opened dust stratification and is returned in flue 10 along ash tube 8, at least one flapper of such guarantee is closed, the crossfire produced when avoiding ash.
Certainly, the air preheater 11 on flue 10 can also be economizer.
Claims (6)
1. a bleeder flue gas oxygen content on-Line Monitor Device, boiler flue is provided with economizer or air preheater, it is characterized in that, this device comprises stopple coupon, described stopple coupon is plugged on the flue of described economizer or air preheater input side, the output terminal of stopple coupon is provided with cyclone separator, by the flying dust in described cyclone separator separation bubble, the air-flow output terminal of cyclone separator connects oxygen amount meter and exhaust tube successively, described exhaust tube is also connected with the pipeline of economizer or air preheater outgoing side, form the bypass of gas flow outside flue thus, this bypass relies on the pressure differential of flue before and after economizer or air preheater to be drawn from flue by air-flow, cyclone separator bottom is also provided with sends the flying dust after being separated back to Luo Hui mechanism in boiler flue.
2. monitoring device as claimed in claim 1, it is characterized in that, described Luo Hui mechanism comprises the ash-storing bin be arranged on below described cyclone separator, described ash-storing bin is provided with the ash tube be connected with the flue of described economizer or air preheater input side, flying dust after isolation falls under gravity in ash-storing bin, return flue through described ash tube again, ash tube arranges flapper.
3. monitoring device as claimed in claim 2, it is characterized in that, described flapper is gravity flapper, and arrange at least two simultaneously, described gravity flapper has different unlatching threshold values, wherein, the threshold values of the gravity flapper of close described ash-storing bin is always less than the threshold values of the gravity flapper near described flue.
4. monitoring device as claimed in claim 1, it is characterized in that, be provided with oxygen detection room between described cyclone separator and described exhaust tube, described oxygen amount meter is connected with this oxygen detection room.
5. monitoring device as claimed in claim 1, it is characterized in that, described stopple coupon is provided with multiple sample tap, multiple stopple coupon is arranged on the same xsect in described flue.
6. monitoring device as claimed in claim 5, it is characterized in that, described stopple coupon is provided with purging pressurized air input port and gas lock section, wherein said gas lock section is near the air-flow input end of described cyclone separator, this gas lock section comprises interior pipe and is nested with the outer tube outside described interior pipe, the closed at both ends of the ring cavity formed between interior pipe and described outer tube, the tube wall pressed on ring of described interior pipe is furnished with the pore of at least one row, described outer tube is provided with gas lock and uses compressed-air actuated input port; Pressurized air is passed into respectively to described purging pressurized air input port and the compressed-air actuated input port of described gas lock, gas lock pressurized air forms gas lock by the described pore of annular arrangement in interior pipe, forces pressurized air to be discharged from described sample tap and purges stopple coupon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520318433.1U CN204694512U (en) | 2015-05-18 | 2015-05-18 | Bleeder flue gas oxygen content on-Line Monitor Device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520318433.1U CN204694512U (en) | 2015-05-18 | 2015-05-18 | Bleeder flue gas oxygen content on-Line Monitor Device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204694512U true CN204694512U (en) | 2015-10-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520318433.1U Withdrawn - After Issue CN204694512U (en) | 2015-05-18 | 2015-05-18 | Bleeder flue gas oxygen content on-Line Monitor Device |
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| CN (1) | CN204694512U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849108A (en) * | 2015-05-18 | 2015-08-19 | 苏靖 | Gas-exhaust-type online monitoring method and gas-exhaust-type online monitoring device for oxygen content |
-
2015
- 2015-05-18 CN CN201520318433.1U patent/CN204694512U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849108A (en) * | 2015-05-18 | 2015-08-19 | 苏靖 | Gas-exhaust-type online monitoring method and gas-exhaust-type online monitoring device for oxygen content |
| CN104849108B (en) * | 2015-05-18 | 2019-03-29 | 苏靖 | Bleeder flue gas oxygen content on-line monitoring method and device |
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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: 20151007 Termination date: 20170518 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151007 Effective date of abandoning: 20190329 |
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| AV01 | Patent right actively abandoned |