CN203899451U - Air seal device for flue gas denitration system - Google Patents
Air seal device for flue gas denitration system Download PDFInfo
- Publication number
- CN203899451U CN203899451U CN201420228509.7U CN201420228509U CN203899451U CN 203899451 U CN203899451 U CN 203899451U CN 201420228509 U CN201420228509 U CN 201420228509U CN 203899451 U CN203899451 U CN 203899451U
- Authority
- CN
- China
- Prior art keywords
- denitration
- flue gas
- valve
- air
- pipeline
- 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
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 239000003546 flue gas Substances 0.000 title claims abstract description 34
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 210000004907 gland Anatomy 0.000 claims description 17
- 230000006835 compression Effects 0.000 claims description 12
- 238000007906 compression Methods 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 abstract description 9
- 239000012535 impurity Substances 0.000 abstract description 3
- 239000007921 spray Substances 0.000 abstract 3
- 238000011109 contamination Methods 0.000 abstract 1
- 238000007599 discharging Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model relates to an air seal device, in particular to an air seal device for a flue gas denitration system and solves the problem that since a conventional denitration pipeline is badly sealed, flue gas leaks to the denitration pipeline. The air seal device comprises an air compressor and a spray nozzle communicated with the air compressor through an air seal pipeline, wherein the spray nozzle is arranged at the outlet of a denitration valve of the flue gas denitration system; air sprayed by the spray nozzle forms air sealing at the outlet of the denitration valve. According to the utility model, compressed air is provided for the end surface of the outlet of the denitration valve, so that flue gas containing incomplete burning impurities is prevented from leaking to the denitration pipeline, and accordingly, a catalyst in the denitration pipeline is protected and prevented from contamination.
Description
Technical field
The utility model relates to a kind of air seal set, is specifically related to a kind of air seal set for flue gas denitrification system.
Background technology
Denitrification apparatus peculiar to vessel is mainly used in the equipment such as marine diesel and boiler, two groups of pipelines are generally set on smoke discharging pipe, one group is denitration pipeline, flue gas is direct discharge line after denitration is processed, another group is bypass line, when flue gas does not need to process, flue gas is discharged from bypass line, and two groups of pipelines are switched and carried out work by valve.Temperature when flue gas is discharged is generally greater than 250 degrees Celsius, so general the employing firmly of the valve of pipeline seals.When marine diesel or marine boiler have just started, the flue-gas temperature of discharging is lower, in flue gas, contain a lot of unburnt impurity, catalyst is had to very large pollution, easily be attached to catalyst surface, catalyst poisoning, activity decreased, denitration efficiency are reduced, and when therefore just having started shooting, flue gas need to pass through from bypass line, can not directly from denitration pipeline, pass through.Because valve has adopted hard sealing, when flue gas passes through bypass line, flue gas can be leaked in denitration pipeline, and catalyst is produced to adverse influence.
Utility model content
Technical problem to be solved in the utility model is how denitration pipeline to be sealed to prevent that flue gas is leaked in denitration pipeline.
The technical solution adopted in the utility model has been to provide a kind of sealing device of denitrating system peculiar to vessel, comprise air compression plant and the nozzle being communicated with air compression plant by sealing gland pipeline, described nozzle is arranged at the denitration valve export place of flue gas denitrification system, and the gas of described nozzle ejection forms hermetic seal to denitration valve port place.
Further, described air compression plant is air compressor.
Further, the quantity of described nozzle is 1-20.
Further, the quantity of described nozzle is 3.
Further, described nozzle is to wait radian annular to be laid on denitration pipeline inner wall.
Further, described nozzle face is to denitration valve export, and the angle of nozzle and denitration pipeline inner wall is 0 ° to 90 °.
Further, the angle of described nozzle and denitration pipeline inner wall is 45 °.
Further, on described sealing gland pipeline, be provided with sealing gland valve.
Further, described sealing gland valve is electromagnetic valve.
The beneficial effects of the utility model are to utilize to the end face of denitration valve export to provide compressed air; thereby prevent that the flue gas that contains unburnt impurity is leaked in denitration pipeline; solved denitration pipeline has been sealed to prevent that flue gas is leaked in denitration pipeline; guard catalyst, avoids the contaminated problem of catalyst.
Accompanying drawing explanation
Fig. 1 is the structural representation of denitrating system peculiar to vessel of the present utility model.
Fig. 2 is the partial enlarged drawing of a kind of air seal set for flue gas denitrification system of the utility model.
Fig. 3 is that Fig. 2 is along the cutaway view of A-A line.
In figure: 1-engine, 2-denitration pipeline, 3-bypass line, 4-denitration valve, 5-bypath valve, 6-SCR reactor, 7-nozzle, 8-sealing gland valve, 9-air compression plant, 10-sealing gland pipeline.
The specific embodiment
As shown in Figure 1, denitrating system peculiar to vessel is generally comprised of engine 1, denitration pipeline 2 and bypass line 3, is provided with denitration valve 4 on denitration pipeline 2, is provided with bypath valve 5 on bypass line 3, two groups of pipelines are switched and are carried out work by valve, have SCR reactor 6 in denitration pipeline 2.A kind of air seal set for flue gas denitrification system of the utility model, comprise air compression plant 9 and the nozzle 7 being communicated with air compression plant 9 by sealing gland pipeline 10, described nozzle 7 is arranged at denitration valve 4 exits of flue gas denitrification system, and the gas of described nozzle 7 ejections forms hermetic seal to denitration valve 4 exits.Described air compression plant 9 is air compressor.On the sealing gland pipeline 10 being connected with air compression plant 9, be provided with sealing gland valve 8, described sealing gland valve 8 is electromagnetic valve.As shown in Figure 2, described nozzle 7 is towards 4 outlets of denitration valve, and the angle of nozzle 7 and denitration pipeline 2 inwalls is 45 °.As shown in Figure 3,3 nozzles 7 are to wait radian annular to be laid on denitration pipeline 2 inwalls.Denitration valve 4 on denitration pipeline 2 is closed, the sealing gland valve 8 on sealing gland pipeline 10 is when open; the compressed air that air compression plant 9 produces is transported to nozzle 7 by sealing gland pipeline 10; nozzle 7 provides compressed air to the end face of denitration valve 4 outlets of denitration pipeline 2; guarantee that denitration valve 4 outlet side pressure are greater than inlet side pressure; flue gas can not be by denitration valve 4; be leaked in the SCR reactor 6 of denitration pipeline 2 and go; thereby the catalyst in protection SCR reactor 6, avoids catalyst contaminated.
Claims (9)
1. the air seal set for flue gas denitrification system, it is characterized in that: comprise air compression plant and the nozzle being communicated with air compression plant by sealing gland pipeline, described nozzle is arranged at the denitration valve export place of flue gas denitrification system, and the gas of described nozzle ejection forms hermetic seal to denitration valve port place.
2. a kind of air seal set for flue gas denitrification system according to claim 1, is characterized in that: described air compression plant is air compressor.
3. a kind of air seal set for flue gas denitrification system according to claim 1, is characterized in that: the quantity of described nozzle is 1-20.
4. a kind of air seal set for flue gas denitrification system according to claim 3, is characterized in that: the quantity of described nozzle is 3.
5. a kind of air seal set for flue gas denitrification system according to claim 1, is characterized in that: described nozzle is to wait radian annular to be laid on denitration pipeline inner wall.
6. a kind of air seal set for flue gas denitrification system according to claim 1, is characterized in that: described nozzle face is to denitration valve export, and the angle of nozzle and denitration pipeline inner wall is 0 ° to 90 °.
7. a kind of air seal set for flue gas denitrification system according to claim 6, is characterized in that: the angle of described nozzle and denitration pipeline inner wall is 45 °.
8. a kind of air seal set for flue gas denitrification system according to claim 1, is characterized in that: on described sealing gland pipeline, be provided with sealing gland valve.
9. a kind of air seal set for flue gas denitrification system according to claim 8, is characterized in that: described sealing gland valve is electromagnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420228509.7U CN203899451U (en) | 2014-05-06 | 2014-05-06 | Air seal device for flue gas denitration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420228509.7U CN203899451U (en) | 2014-05-06 | 2014-05-06 | Air seal device for flue gas denitration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203899451U true CN203899451U (en) | 2014-10-29 |
Family
ID=51773743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420228509.7U Expired - Lifetime CN203899451U (en) | 2014-05-06 | 2014-05-06 | Air seal device for flue gas denitration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203899451U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104645827A (en) * | 2015-02-12 | 2015-05-27 | 浙江三龙催化剂有限公司 | Denitration equipment for industrial smoke |
-
2014
- 2014-05-06 CN CN201420228509.7U patent/CN203899451U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104645827A (en) * | 2015-02-12 | 2015-05-27 | 浙江三龙催化剂有限公司 | Denitration equipment for industrial smoke |
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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: 20141029 |