CN201795478U - Circulating fluidized bed boiler and limestone injector thereof - Google Patents
Circulating fluidized bed boiler and limestone injector thereof Download PDFInfo
- Publication number
- CN201795478U CN201795478U CN2010202345827U CN201020234582U CN201795478U CN 201795478 U CN201795478 U CN 201795478U CN 2010202345827 U CN2010202345827 U CN 2010202345827U CN 201020234582 U CN201020234582 U CN 201020234582U CN 201795478 U CN201795478 U CN 201795478U
- Authority
- CN
- China
- Prior art keywords
- nozzle
- pipe
- injection pipe
- lime stone
- injector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 235000019738 Limestone Nutrition 0.000 title claims abstract description 47
- 239000006028 limestone Substances 0.000 title claims abstract description 46
- 238000002347 injection Methods 0.000 claims abstract description 51
- 239000007924 injection Substances 0.000 claims abstract description 51
- 230000000694 effects Effects 0.000 abstract description 6
- 239000002245 particle Substances 0.000 description 7
- 239000000446 fuel Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Images
Abstract
The utility model provides a limestone injector of a circulating fluidized bed boiler, which comprises an injection pipeline (1), a tremie pipe (2) and an injection nozzle (3); the tremie pipe (2) is positioned above the injection pipeline (1) and communicated with the injection pipeline (1); the injection nozzle (3) is arranged in the injection pipeline (1); an outlet of the injection nozzle (3) extends to the lower part of a pipe orifice of the tremie pipe (2); and the ratio between the outlet diameter (D1) and the inlet diameter (D2)of the injection nozzle (3) is 11/20 to 1/4. The limestone injector of the circulating fluidized bed boiler has the advantages that the injection effect is good, the sufficient limestone can be injected, and the injection pipeline is not easily blocked.
Description
Technical field
The utility model relates to a kind of lime stone injector of CFBB, particularly, relates to a kind of lime stone injector that is used for the desulphurization system of CFBB.
Background technology
CFBB utilizes Combustion technology of circulating fluidized, has advantages such as fuel tolerance is good, efficient is high, disposal of pollutants is few.Because fuel is fluidized state in fluid bed, can fully contact with air and be fully burned, so the fuel of CFBB can adopt colm, a certain proportion of gangue that for example mixes, putty slag etc.But burning environment of inferior quality coal can produce multiple pernicious gas, for example sulfide etc.In order to satisfy environmental requirement, desulphurization system need be set, on CFBB to remove the sulphur in the fuel.For example, can adopt dry method stokehole desulfuration device, promptly by the lime stone injector be communicated with the burner hearth of CFBB is set, thereby in burner hearth, spray lime stone, so that the reaction of Salmon-Saxl in lime stone and the fuel and sulphur is removed by this lime stone injector.
The lime stone injector of existing CFBB generally includes injection pipe, tremie pipe and nozzle, described tremie pipe is positioned at the top of described injection pipe and is communicated with described injection pipe, described nozzle is arranged on the below that the outlet interior and this nozzle of described injection pipe extends to the mouth of pipe of described tremie pipe, and the outlet diameter of described nozzle is less than the inlet diameter of described nozzle.When work, lime stone falls in the described injection pipe from described tremie pipe, and air (for example air that blasts by air blast) enters from the inlet of described injection pipe, pass through the below of described tremie pipe at a high speed through the air stream of described nozzle supercharging, thereby the formation negative pressure will suck in the burner hearth along described injection pipe from the lime stone that described tremie pipe falls into.
Find that in actual applications the jeting effect of above-mentioned lime stone injector is bad, the not enough and injection pipe of the emitted dose of lime stone often stops up.
The utility model content
It is good that technical problem to be solved in the utility model provides a kind of jeting effect, can spray the lime stone of q.s and the lime stone injector that injection pipe is difficult for the CFBB of generation obstruction.
Inventor of the present utility model finds after deliberation, causes the not enough and reason that injection pipe takes place to stop up of the lime stone emitted dose of lime stone injector to be that the negative pressure of tremie pipe below is too little.Because negative pressure is too little, therefore be not enough to carry a large amount of lime stones, cause the lime stone emitted dose not enough; Because negative pressure is too little, therefore the lime stone that falls from feed opening is mobile relatively poor, causes generation fouling clogging in nozzle place and injection pipe.
For solving the problems of the technologies described above, the utility model provides a kind of lime stone injector of CFBB, this lime stone injector comprises injection pipe, tremie pipe and nozzle, described tremie pipe is positioned at the top of described injection pipe and is communicated with described injection pipe, described nozzle is arranged on the below that the outlet interior and this nozzle of described injection pipe extends to the mouth of pipe of described tremie pipe, wherein, the ratio of the inlet diameter of the outlet diameter of described nozzle and described nozzle is 1/2 to 3/8.
By technique scheme of the present utility model, make that the ratio of inlet diameter of the outlet diameter of described nozzle and described nozzle is 1/2 to 3/8, reduce the outlet diameter of nozzle, improved the pressurized effect of nozzle, thereby made the negative pressure of tremie pipe below increase.Because the negative pressure of tremie pipe below increases, therefore can carry the lime stone of q.s, and improve the flowability of lime stone, thereby be difficult for taking place the fouling clogging in nozzle place and the injection pipe.
Other feature and advantage of the present utility model will partly be described in detail in the specific embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide further understanding of the present utility model, and constitutes the part of specification, is used from explanation the utility model with the specific embodiment one of the present utility model, but does not constitute restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation according to the lime stone injector of the CFBB of a kind of embodiment of the present utility model.
Description of reference numerals
1 injection pipe, 2 tremie pipes
The outlet diameter of 3 nozzle D1 nozzles
The inlet diameter L Center Length of D2 nozzle
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present utility model is elaborated.Should be understood that the specific embodiment described herein only is used for description and interpretation the utility model, is not limited to the utility model.
As shown in Figure 1, a kind of embodiment of the present utility model provides a kind of lime stone injector of CFBB, this lime stone injector comprises injection pipe 1, tremie pipe 2 and nozzle 3, described tremie pipe 2 is positioned at the top of described injection pipe 1 and is communicated with described injection pipe 1, described nozzle 3 is arranged on the below that described injection pipe 1 outlet interior and this nozzle extends to the mouth of pipe of described tremie pipe 2, wherein, the ratio of the inlet diameter D2 of the outlet diameter D1 of described nozzle 3 and described nozzle 3 is 11/20 to 1/4.
By technique scheme, make that the ratio of inlet diameter D2 of the outlet diameter D1 of described nozzle 3 and described nozzle 3 is 11/20 to 1/4, reduced the outlet diameter of nozzle 3, improve the pressurized effect of nozzle 3, thereby made the negative pressure of tremie pipe 2 belows increase.Because the negative pressure of tremie pipe 2 belows increases, therefore can carry the lime stone of q.s, and improve the flowability of lime stone, thereby be difficult for taking place the fouling clogging in nozzle 3 places and the injection pipe 1.
Preferably, the ratio of the inlet diameter D2 of the outlet diameter D1 of described nozzle 3 and described nozzle 3 is 1/2 to 3/8.Thereby further improved the pressurized effect of nozzle 3, thereby made the negative pressure of tremie pipe 2 belows further increase.
Preferably, the Center Length L that extends below the mouth of pipe of described tremie pipe 2 of described nozzle 3 is greater than 1/2 of the nozzle diameter d of described tremie pipe 2.
In the technical solution of the utility model, the described Center Length L of nozzle 3 is meant the length of nozzle 3 along the central axis of this nozzle 3, as shown in Figure 1.
By technique scheme of the present utility model, make Center Length L that described nozzle 3 extends below the mouth of pipe of described tremie pipe 2 greater than 1/2 of the nozzle diameter d of described tremie pipe 2, that is, described nozzle 3 extends beyond the central axis of described tremie pipe 2 mouths of pipe below described tremie pipe 2.Therefore, the air-flow that flows out from the outlet of described nozzle 3 is not vulnerable to the influence of open space of tremie pipe 2 mouths of pipe and the interference of the air-flow that produces when not being vulnerable to limestone particle blanking the tremie pipe 2, thereby is difficult for producing eddy current.Therefore the injection pipe 1 of above-mentioned lime stone injector is difficult for taking place the fouling clogging.
More preferably, the Center Length L that extends below the mouth of pipe of described tremie pipe 2 of described nozzle 3 is greater than 3/5 of the nozzle diameter d of described tremie pipe 2.Thereby the air-flow that has produced when further having reduced limestone particle blanking in the open space of tremie pipe 2 mouths of pipe and the tremie pipe 2 is to the influence of the air-flow that flows out from the outlet of described nozzle 3, make that limestone particle flowing in described injection pipe 1 is more smooth and easy, thus the injection pipe of lime stone injector 1 more difficult generation fouling clogging.
Described injection pipe 1 can adopt various concrete structures as the passage that transports of limestone particle.The caliber of for example described injection pipe 1 can change, for example the supercharging trunnion is set in order to transport the mobilization force of limestone particle in the further increase injection pipe 1, but this can make that also airflow flowing produces eddy current in injection pipe 1, thereby influence transporting of limestone particle, make to be easy to generate the fouling clogging in the injection pipe 1.Therefore preferably, described injection pipe 1 is a straight pipe.That is, pressurized parts such as trunnion are not set on the injection pipe 1, thereby limestone particle can flow in injection pipe 1 more swimmingly, reduces the generation of fouling clogging.
On the other hand, the utility model also provides a kind of CFBB, and this CFBB comprises lime stone injector as indicated above, and the outlet of described injection pipe 1 is communicated with the burner hearth of described CFBB.
Need to prove that each the concrete technical characterictic described in the above-mentioned specific embodiment can make up arbitrarily by any suitable manner, it falls within the scope disclosed in the utility model equally.In addition, also can make up arbitrarily between the various embodiment of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Below describe preferred implementation of the present utility model in conjunction with the accompanying drawings in detail; but; the utility model is not limited to the detail in the above-mentioned embodiment; in technical conceive scope of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.For example, described injection pipe 1 can be formed by single pipe, also can be formed by connecting by flange 4 connectors such as grade by many pipelines as illustrated in fig. 1.
Claims (4)
1. the lime stone injector of a CFBB, this lime stone injector comprises injection pipe (1), tremie pipe (2) and nozzle (3), described tremie pipe (2) is positioned at the top of described injection pipe (1) and is communicated with described injection pipe (1), described nozzle (3) is arranged on the below that described injection pipe (1) outlet interior and this nozzle (3) extends to the mouth of pipe of described tremie pipe (2), it is characterized in that the outlet diameter (D1) of described nozzle (3) is 11/20 to 1/4 with the ratio of the inlet diameter (D2) of described nozzle (3).
2. the lime stone injector of CFBB according to claim 1 is characterized in that, the outlet diameter (D1) of described nozzle (3) is 1/2 to 3/8 with the ratio of the inlet diameter (D2) of described nozzle (3).
3. the lime stone injector of CFBB according to claim 1 is characterized in that, described injection pipe (1) is a straight pipe.
4. CFBB, this CFBB comprises according to the described lime stone injector of above any claim, and the outlet of described injection pipe (1) is communicated with the burner hearth of described CFBB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202345827U CN201795478U (en) | 2010-06-13 | 2010-06-13 | Circulating fluidized bed boiler and limestone injector thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202345827U CN201795478U (en) | 2010-06-13 | 2010-06-13 | Circulating fluidized bed boiler and limestone injector thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201795478U true CN201795478U (en) | 2011-04-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202345827U Expired - Lifetime CN201795478U (en) | 2010-06-13 | 2010-06-13 | Circulating fluidized bed boiler and limestone injector thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201795478U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107281926A (en) * | 2017-07-27 | 2017-10-24 | 中国神华能源股份有限公司 | Modification flying dust nozzle for flue gas demercuration |
-
2010
- 2010-06-13 CN CN2010202345827U patent/CN201795478U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107281926A (en) * | 2017-07-27 | 2017-10-24 | 中国神华能源股份有限公司 | Modification flying dust nozzle for flue gas demercuration |
| CN107281926B (en) * | 2017-07-27 | 2023-07-25 | 中国神华能源股份有限公司 | Modified fly ash nozzle for flue gas mercury removal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110413 |