CN200975957Y - Novel constant velocity fly ash sampler - Google Patents
Novel constant velocity fly ash sampler Download PDFInfo
- Publication number
- CN200975957Y CN200975957Y CN 200620159384 CN200620159384U CN200975957Y CN 200975957 Y CN200975957 Y CN 200975957Y CN 200620159384 CN200620159384 CN 200620159384 CN 200620159384 U CN200620159384 U CN 200620159384U CN 200975957 Y CN200975957 Y CN 200975957Y
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- air
- sampling
- fly ash
- sampler
- separation vessel
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Abstract
The utility model relates to a new type of constant velocity flying ash sampling instrument that can really sample with constant velocity, which is composed of a sampling head, a sampling tube, a drive pipe, a sampling instrument base, a diffuser, an air extractor, an inlet air damper, a separator and an ash tank. The utility model is characterized in that the drive pipe is provided with a sampling tube and an external pressure tube. One end of the sampling tube is inserted into the flue and the other end is connected with the separator. The sampling tube has an internal pressure tube at the connected pipeline. A differential manometer is positioned between the external pressure tube and the internal pressure tube. A back blow valve is positioned between the separator and the air extractor; the bottom of the separator is connected with the ash tank and the upper part of the separator is connected with the air extractor. One end of the air extractor is inserted into the flue and the other end is in air. The inlet of the air extractor is provided with an air damper. During the process of sampling, the size of the damper will be changed to let the air flow across the air extractor and produce the vacuum, and the flue gas will be extracted from the sampling tube and separated in the separator. The fly ash separated will be stored in the ash tank. The exhaust air will be puffed into the flue through the air extractor, and the size of the damper will be changed to make the indicating value of the differential manometer to become zero, and thus the real constant velocity sampling can be realized.
Description
Technical field
The utility model relates to a kind of fly ash sampler, especially relates to a kind ofly really realizing isokinetic sampling and novel constant speed fly ash sampler that need not power.
Background technology
Flying dust is meant that fuel enters the fine particle of back-end ductwork with flue gas in boiler furnace burning back, the quality of uncompleted burned carbon accounts for the percent of flying dust amount unburned combustible in fly ash in the flying dust, combustible content is the leading indicator of reflection boiler combustion effect in the flying dust, in the day-to-day operation of boiler, need periodically gather the flying dust sample and measure unburned combustible in fly ash, so that the quality of supervision boiler combustion operating mode is in time improved operation, improve boiler thermal output.When doing boiler performance certification test, Burning Adjustment Test, boiler thermal output test and air preheater air leakage test, also need to gather that the flying dust sample is measured unburned combustible in fly ash so that provide accurate data for heating power calculates in addition.
Yet, the still old-fashioned impact type fly ash sampler that present most power plant uses, because it can't realize the isokinetic sampling, thereby make particle bigger in the flying dust be fallen into the collection bulk cement storage tank by bump, cause in the flying dust sample of being gathered coarse grain more than coarse grain in the actual flying dust, make its unburned combustible in fly ash measurement result higher, it is inaccurate that the result calculates boiler heating power.Even it is now existing in addition from the odd test fly ash sampler, because the differential pressure gauge that they do not have static pressure, ram-air pipe and match, so can't judge when reality is taken a sample whether rate of air sucked in required is regulated suitable, more can not really realize " isokinetic sampling ", therefore the accuracy of sampling is still relatively poor, do not solve the accuracy problem of Fly ash sampling fully, only more convenient and more flexible than the impacting type sampling.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of structure uniqueness, really realize the isokinetic sampling and need not power so that accurate flying dust sample is provided, makes heating power calculate accurate more novel constant speed fly ash sampler for power plant.
The utility model is realized in the following way:
A kind of novel constant speed fly ash sampler, comprise sampling head, stopple coupon, drive pipe, the sampler base, diffuser pipe, air ejector, the air inlet adjustment air door, separation vessel and bulk cement storage tank, it is characterized in that: stopple coupon and external pressure tube are housed in above-mentioned drive pipe, stopple coupon one end inserts in the flue, the other end links to each other with separation vessel, and with pipeline that separation vessel links to each other on be provided with interior pressure pipe, be connected to differential pressure gauge between pressure pipe and the external pressure tube in being somebody's turn to do, the separation vessel bottom is connected to bulk cement storage tank, separation vessel top links to each other with air ejector, air ejector one end inserts in the flue by diffuser pipe, and the other end is arranged in atmosphere, and inlet is equipped with the air inlet adjustment air door;
On the pipeline between described separation vessel and the described air ejector, be provided with back-flushing valve;
In described, be equipped with valve on pressure pipe and the external pressure tube;
On described sampling head, be combined with an attaching nut;
Described differential pressure is counted diaphragm type differential pressure gauge;
Described sampler base is connected on the hot wall by several bolts.
The utility model has following effect:
1) the structure uniqueness can realize the unpowered sampling of constant speed: the diaphragm type differential pressure gauge that the utility model is provided with inside and outside pressure pipe and matches with it, thereby really realize the isokinetic sampling by the aperture size that changes the air inlet adjustment air door, thereby make the flying dust typical sample good, accurate.
2) utility appliance is few, operating cost is low: the fly ash sampler that the utility model provides need not external compressed air, saves equipment such as compression pump, flexible pipe, reduces investment outlay.
3) convenient, the limit value that is not subjected to the flow of flue gas occasion of sampling: the utility model is designed to nut with sampling head and connects, and convenient disassembly in case damage, is changed more conveniently, has so just increased this equipment security and the permanance of use for a long time greatly.Sampler is applicable to the mobile occasion of flue gas on any direction in addition, as long as rotate the direction of sampling head, guarantees that thief hole is vertical with flue gas to get final product, and has strengthened the versatility and the practicality of sampler greatly.
4) service life of equipment is long: the fly ash sampler that the utility model provides is provided with back-flushing valve, can conveniently carry out the blowback cleaning to bulk cement storage tank, separation vessel and stopple coupon, has prevented the equipment obstruction; But the minor alteration fine tuning rate of air sucked in required by the back-flushing valve aperture achieves constant speed in addition; And each parts all makes of stainless steel, can effectively prevent the corrosion of flue gas to equipment, prolonged equipment life.
5) install, easy to use, maintenance workload is little: coupling bolt directly is welded on the hot wall, links to each other with nut with hole on the sampler base, has overcome to have the drawback that is welded to connect now, can realize installing at any time, dismantling.
6) usable range is wide: the constant speed fly ash sampler air inlet adjustment throttle opening regulated quantity that the utility model provides is big, and it is big to change the air ejector traffic ability, applicable to the different occasions that require of big or small unit flue negative pressure, has strengthened the versatility and the practicality of instrument.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
A kind of novel constant speed fly ash sampler, comprise sampling head 1, stopple coupon 3, drive pipe 4, sampler base 7, diffuser pipe 8, air ejector 9, air inlet adjustment air door 10, separation vessel 12 and bulk cement storage tank 13, as shown in Figure 1: stopple coupon 3 and external pressure tube 16 are housed in above-mentioned drive pipe 4, stopple coupon 3 one ends insert in the flue, the other end links to each other with separation vessel 12, and with pipeline that separation vessel 12 links to each other on be provided with in pressure pipe 15, be connected to differential pressure gauge 14 between pressure pipe 15 and the external pressure tube 16 in this.Separation vessel 12 bottoms are connected to bulk cement storage tank 13, separation vessel 12 upper pipe link to each other with air ejector 9, and on the pipeline between separation vessel 12 and the air ejector 9, be provided with back-flushing valve 11, separation vessel 12 bottoms are connected to bulk cement storage tank 13, separation vessel 12 tops link to each other with air ejector 9, air ejector 9 one ends insert in the flue by diffuser pipe 8, the other end is arranged in atmosphere, inlet is equipped with air inlet adjustment air door 10, changing air inlet adjustment air door 10 sizes during sampling, to make differential pressure gauge 14 indicating values be zero, external pressure equates in this moment, really realizes the isokinetic sampling.
On interior pressure pipe 15 and external pressure tube 16, be equipped with valve.
On sampling head 1, be combined with an attaching nut 2 that can realize sampling head 1 comprehensive rotation, to realize the Fly ash sampling of any direction.
In actual use, differential pressure gauge 14 can be diaphragm type differential pressure gauge.
Sampler base 7 is connected on the hot wall 5 by several bolts 6, has overcome the existing drawback that is welded to connect, and can realize installing at any time, dismantling.
The constant speed fly ash sampler that the utility model provides is to rely on external atmosphere pressure and the interior formed differential pressure of flue gas negative pressure of flue that air is flowed in air ejector 9, thereby generation vacuum, flue gas constant speed from flue is sucked stopple coupon, in cyclone separator 12 flying dust in the flue gas is separated and be collected in the bulk cement storage tank 13, the flue gas of cleaning then returns flue by air ejector 8.In the air ejector import air inlet adjustment air door 10 is housed, can conveniently be used for the size of bleeding regulating device air inflow, making differential pressure gauge 14 indicating values is zero, to reach the purpose that the inside and outside pressure of stopple coupon equates, thereby the speed of evacuation in the stopple coupon is equated with flue gas flow rate in the flue, reach real isokinetic sampling's purpose.
Before the formal sampling, unload bulk cement storage tank 13 flying dust in the bulk cement storage tank 13 is all fallen clearly, close 11 pairs of stopple coupons of back-flushing valve and carry out blowback, then bulk cement storage tank 13 is tightened;
Open the valve on the external pressure tube 15,16 in the differential pressure gauge, open back-flushing valve 11, change air inlet adjustment air door 10 apertures air inflow is changed, until differential pressure gauge 14 indicating values is zero, stops to regulate, and sampling picks up counting this moment, about about 20 minutes of sample time, general desirable 5-8g.
Sampling is closed back-flushing valve 11 after finishing, and air inlet adjustment air door 10 is closed, and makes air not enter air ejector 9, prevents that cold air from entering flue.Unload bulk cement storage tank 13, the flying dust sample is packed in the container of collected specimens, then bulk cement storage tank is tightened, close the differential pressure gauge imported valve; Sampling next time repeats the said method step.
Claims (6)
1. novel constant speed fly ash sampler, comprise sampling head (1), stopple coupon (3), drive pipe (4), sampler base (7), diffuser pipe (8), air ejector (9), air inlet adjustment air door (10), separation vessel (12) and bulk cement storage tank (13), it is characterized in that: stopple coupon (3) and external pressure tube (16) are housed in above-mentioned drive pipe (4), stopple coupon (3) one ends insert in the flue, the other end links to each other with separation vessel (12), and with pipeline that separation vessel (12) links to each other on be provided with interior pressure pipe (15), be connected to differential pressure gauge (14) between pressure pipe (15) and the external pressure tube (16) in being somebody's turn to do, separation vessel (12) bottom is connected to bulk cement storage tank (13), separation vessel (12) top links to each other with air ejector (9), air ejector (9) one ends insert in the flue by diffuser pipe (8), the other end is arranged in atmosphere, and inlet is equipped with air inlet adjustment air door (10).
2. novel constant speed fly ash sampler as claimed in claim 1 is characterized in that: be provided with back-flushing valve (11) on the pipeline between described separation vessel (12) and the described air ejector (9).
3. novel constant speed fly ash sampler as claimed in claim 1 is characterized in that: be equipped with valve on pressure pipe in described (15) and the external pressure tube (16).
4. novel constant speed fly ash sampler as claimed in claim 1 is characterized in that: be combined with an attaching nut (2) on described sampling head (1).
5. novel constant speed fly ash sampler as claimed in claim 1 is characterized in that: described differential pressure gauge (14) is a diaphragm type differential pressure gauge.
6. novel constant speed fly ash sampler as claimed in claim 1 is characterized in that: described sampler base (7) is connected on the hot wall (5) by several bolts (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620159384 CN200975957Y (en) | 2006-11-27 | 2006-11-27 | Novel constant velocity fly ash sampler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620159384 CN200975957Y (en) | 2006-11-27 | 2006-11-27 | Novel constant velocity fly ash sampler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200975957Y true CN200975957Y (en) | 2007-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620159384 Expired - Fee Related CN200975957Y (en) | 2006-11-27 | 2006-11-27 | Novel constant velocity fly ash sampler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200975957Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928258A (en) * | 2012-11-26 | 2013-02-13 | 山东电力集团公司电力科学研究院 | Fixed type flying ash sampling device of coal-fired boiler and method |
| CN108827724A (en) * | 2018-06-21 | 2018-11-16 | 华能国际电力股份有限公司 | A kind of big section flue SCR-CEMS flue gas multiple spot mixed in equal amounts second level injection quick sampling devices and methods therefor |
| CN111351032A (en) * | 2020-04-03 | 2020-06-30 | 杭州航民江东热电有限公司 | Boiler ash taking and returning circulation system |
| CN111504710A (en) * | 2020-05-07 | 2020-08-07 | 浙江浙能长兴发电有限公司 | Compact coal powder sampling and diluting device |
-
2006
- 2006-11-27 CN CN 200620159384 patent/CN200975957Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928258A (en) * | 2012-11-26 | 2013-02-13 | 山东电力集团公司电力科学研究院 | Fixed type flying ash sampling device of coal-fired boiler and method |
| CN102928258B (en) * | 2012-11-26 | 2015-10-28 | 山东电力集团公司电力科学研究院 | A kind of fixed fly ash sampling device of coal-burning boiler and method |
| CN108827724A (en) * | 2018-06-21 | 2018-11-16 | 华能国际电力股份有限公司 | A kind of big section flue SCR-CEMS flue gas multiple spot mixed in equal amounts second level injection quick sampling devices and methods therefor |
| CN108827724B (en) * | 2018-06-21 | 2024-01-26 | 华能国际电力股份有限公司 | Sampling method of flue gas multipoint equivalent mixing two-stage injection rapid sampling device |
| CN111351032A (en) * | 2020-04-03 | 2020-06-30 | 杭州航民江东热电有限公司 | Boiler ash taking and returning circulation system |
| CN111504710A (en) * | 2020-05-07 | 2020-08-07 | 浙江浙能长兴发电有限公司 | Compact coal powder sampling and diluting device |
| CN111504710B (en) * | 2020-05-07 | 2023-02-10 | 浙江浙能长兴发电有限公司 | Compact coal powder sampling and diluting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071114 Termination date: 20101127 |