CN210601684U - Power station boiler system - Google Patents
Power station boiler system Download PDFInfo
- Publication number
- CN210601684U CN210601684U CN201921656829.1U CN201921656829U CN210601684U CN 210601684 U CN210601684 U CN 210601684U CN 201921656829 U CN201921656829 U CN 201921656829U CN 210601684 U CN210601684 U CN 210601684U
- Authority
- CN
- China
- Prior art keywords
- flue
- denitration
- branch
- flue gas
- boiler system
- 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.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model discloses a power station boiler system, including starting boiler, main boiler, gas cleaning device, first intercommunication flue (100) and second intercommunication flue (200), the start boiler has first exhanst gas outlet, the main boiler has the second exhanst gas outlet, first intercommunication flue (100) intercommunication first exhanst gas outlet with gas cleaning device, second intercommunication flue (200) intercommunication the second exhanst gas outlet with gas cleaning device. The problem that flue gas purification can't be carried out to the start-up boiler among traditional power plant boiler system can be solved to this scheme.
Description
Technical Field
The utility model relates to a power plant boiler equipment technical field especially relates to a power plant boiler system.
Background
In the field of large-scale power station boilers, along with the strict control of the national flue gas emission indexes, the flue gas emission indexes in a power station boiler system have higher and higher requirements, and therefore, the power station boiler system needs to be provided with a corresponding flue gas purification device to purify the discharged flue gas.
Usually, a flue gas cleaning device in a utility boiler system is in communication with a main boiler to clean flue gas discharged from the main boiler. However, there is not corresponding gas cleaning device in the start-up boiler of utility boiler system, simultaneously, because start-up boiler is as the initial stage user equipment that starts of utility boiler system, and the utilization ratio during whole utility boiler system operation is lower, consequently, sets up one set of gas cleaning device alone, will make utility boiler's economic nature relatively poor.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a power station boiler system to solve traditional power station boiler system in can't carry out gas cleaning's problem to starting the boiler.
In order to solve the above problem, the utility model adopts the following technical scheme:
the utility model provides a power station boiler system, is including starting boiler, main boiler, gas cleaning device, first intercommunication flue and second intercommunication flue, it has first exhanst gas outlet to start the boiler, main boiler has the second exhanst gas outlet, first intercommunication flue intercommunication first exhanst gas outlet with gas cleaning device, second intercommunication flue intercommunication second exhanst gas outlet with gas cleaning device.
The utility model discloses a technical scheme can reach following beneficial effect:
the embodiment of the utility model discloses among the power plant boiler system, flue gas purification device and the first exhanst gas outlet intercommunication of starting the boiler, simultaneously, flue gas purification device still communicates with the second exhanst gas outlet of main boiler, that is to say, main boiler and the flue gas purification device that starts among the boiler can the shared power plant boiler system compare in current power plant boiler system, this kind of mode not only can furthest's the produced flue gas of purification power plant boiler system, can also avoid setting up solitary flue gas purification device and influencing the cost of power plant boiler system at the first exhanst gas outlet who starts the boiler.
Drawings
The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:
FIG. 1 is a schematic diagram of a partial structure of a utility boiler system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an SCR denitration device.
Description of reference numerals:
100-a first communicating flue, 120-a first branch pipeline and 121-a first switch valve;
200-a second communicating flue, 210-a second main pipeline, 220-a second branch pipeline and 221-a third on-off valve;
300-SCR denitration device, 310-denitration channel and 311-second switch valve;
400-flue gas discharge pipe.
Detailed Description
To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
As shown in fig. 1-2, the embodiment of the present invention discloses a utility boiler system, which comprises a start boiler, a main boiler, a flue gas purification device, a first communicating flue 100 and a second communicating flue 200.
The starting boiler is a starting initial-stage using device of the power station boiler system, the starting boiler is communicated with the main boiler, and under the normal condition, the power station boiler system mainly burns fuel in the starting boiler, so that chemical energy of the fuel is converted into heat energy, further, the heat energy is conveyed into the main boiler, and water in the main boiler is heated by the heat energy to form superheated steam which is finally used by a steam turbine.
Under the general condition, the start-up boiler has first exhanst gas outlet, the main boiler has the second exhanst gas outlet, the produced flue gas of fuel burning can discharge away through first exhanst gas outlet and second exhanst gas outlet, and simultaneously, in order to reach the requirement of fume emission index, power plant boiler system still is provided with smoke purification device, concretely, the second exhanst gas outlet of main boiler is provided with second intercommunication flue 200, second intercommunication flue 200 intercommunication second exhanst gas outlet and smoke purification device, thereby make the flue gas that discharges in the main boiler can pass through smoke purification device and purify the back, the flue gas reaches required emission index, finally discharge in the air.
The embodiment of the utility model discloses among the power plant boiler system, flue gas purification device also communicates with first exhanst gas outlet to make the flue gas that discharges in the start-up boiler also can purify through flue gas purification device, finally reach the requirement of fume emission index. Specifically, the first communicating flue 100 communicates the first flue gas outlet with the flue gas purification device.
Therefore, the embodiment of the utility model discloses an among the power plant boiler system, flue gas purification device and the first exhanst gas outlet intercommunication of starting the boiler, simultaneously, flue gas purification device still communicates with the second exhanst gas outlet of main boiler, that is to say, main boiler and the flue gas purification device that starts among the boiler can the shared power plant boiler system compare in current power plant boiler system, the produced flue gas of purification power plant boiler system that this kind of mode not only can furthest, can also avoid setting up solitary flue gas purification device and influence the cost of power plant boiler system at the first exhanst gas outlet who starts the boiler.
Generally, the flue gas purification device comprises a denitration device, a desulfurization device, a dust removal device and the like, so that various harmful gases in the flue gas can be treated, and certainly, denitration is a more important link in the flue gas purification device, so that in order to realize better denitration, the denitration device can be an SCR denitration device 300, and in specific assembly, a first communicating flue 100 is communicated with a first flue gas outlet and the SCR denitration device 300, so that the SCR denitration device 300 can perform denitration on the flue gas discharged from a starting boiler; meanwhile, the second communicating flue 200 communicates the second flue gas outlet with the SCR denitration device 300, so that the SCR denitration device 300 can perform denitration on flue gas discharged from the main boiler. After denitration by the SCR denitration device 300, the flue gas needs to be discharged to another purification device, and in general, the SCR denitration device 300 has a flue gas discharge pipe 400, and the SCR denitration device 300 discharges the flue gas to another purification device through the flue gas discharge pipe 400 to perform next flue gas purification.
Simultaneously, for making the flue gas can be easier carry out gas cleaning in getting into gas cleaning device, first intercommunication flue 100 and second intercommunication flue 200 all can be provided with the draught fan, and the draught fan can be with starting in boiler and the main boiler produced flue gas pump send the gas cleaning device to improve the purification efficiency of flue gas.
The embodiment of the utility model discloses in the power plant boiler system, the flue gas volume that discharges in the start-up boiler is less, less flue gas enters into the reaction temperature that can't guarantee the flue gas in SCR denitrification facility 300 and can satisfy the catalyst, thereby lead to SCR denitrification facility 300 to be relatively poor to the denitration effect of flue gas easily, therefore, in the scheme of comparatively preferring, SCR denitrification facility 300 can include a plurality of denitration passageways 310, please refer to fig. 2, for example, SCR denitrification facility 300 can include nine denitration passageways 310, when the flue gas volume that discharges in the start-up boiler is less, can close wherein several denitration passageways 310, thereby make the flue gas volume that enters into among the denitration passageway 310 can satisfy the required flue gas volume of catalyst, and then improve SCR denitrification facility 300's denitration rate.
Meanwhile, in order to facilitate the communication between the first flue gas outlet of the start-up boiler and the plurality of denitration channels 310, the first communicating flue 100 may include a first main duct and a plurality of first branch ducts 120 corresponding to the plurality of denitration channels 310 one to one, specifically, a first end of the first branch duct 120 is communicated with a first end of the first main duct, a second end of the first main duct is communicated with the first flue gas outlet, and a second end of the first branch duct 120 is communicated with the corresponding denitration channels 310. In a specific working process, flue gas discharged from the boiler is conveyed to the first main pipe through the first flue gas outlet, further, the flue gas in the first main pipe is separated through the plurality of first branch pipes 120 which are communicated, so that the flue gas is conveyed to the plurality of denitration channels 310 through the plurality of first branch pipes 120, of course, the plurality of first branch pipes 120 are all provided with the first switch valve 121, and when the flue gas amount in the first branch pipes 120 is small, the corresponding first branch pipes 120 can be closed through the first switch valve 121, so that the flue gas amount entering the denitration channels 310 is large.
Based on this, in order to conveniently communicate the second flue gas outlet of the main boiler with the plurality of denitration channels 310, the second communicating flue 200 may include a second main duct 210 and a plurality of second branch ducts 220 corresponding to the plurality of denitration channels 310 one to one, specifically, a first end of each of the second branch ducts 220 is communicated with a first end of the second main duct 210, a second end of the second main duct 210 is communicated with the second flue gas outlet, and a second end of each of the second branch ducts 220 is communicated with the corresponding denitration channel 310. In a specific operation process, the flue gas discharged from the main boiler is conveyed to the second main duct 210 through the second flue gas outlet, and further, the flue gas in the second main duct 210 is separated by the plurality of second branch ducts 220, so that the flue gas is conveyed to the plurality of denitration channels 310 through the plurality of second branch ducts 220.
The utility model discloses an in-process that SCR denitrification facility 300 carries out the denitration to the flue gas, SCR denitrification facility 300 has certain requirement to the temperature of the flue gas of inputing. In general, the temperature of the flue gas discharged from the start-up boiler is high, and at the same time, the temperature of the flue gas discharged from the main boiler is low in the initial start-up period of the utility boiler system, so that the second end of the first branch pipe 120 may be connected between the two ends of the second branch pipe 220, and the second end of the first branch pipe 120 is communicated with the denitration channel 310 through the second branch pipe 220, in order to make the temperature of the flue gas discharged from the main boiler meet the required flue gas temperature of the SCR denitration device 300. In this way, the flue gas discharged from the main boiler is mixed with the flue gas discharged from the start-up boiler before entering the SCR denitration device 300, so that the mixed flue gas enters the SCR denitration device 300 for denitration. This kind of mode not only makes the flue gas that the main boiler discharged can reach the required flue gas temperature of SCR denitrification facility 300, simultaneously, can also cool down the flue gas that discharges in the start-up boiler.
In the working process of the whole power station boiler system, in order to prevent the denitration effect of the SCR denitration device 300 on flue gas from being influenced by the fact that the flue gas amount of the mixed flue gas input into the SCR denitration device 300 is small, the first branch pipe 120 and the second branch pipe 220 corresponding to the several denitration channels 310 of the SCR denitration device 300 can be closed, so that the flue gas amount in other denitration channels 310 is large, the denitration efficiency is improved, of course, in a more preferable scheme, the communication part of the denitration channels 310 and the second branch pipes 220 can be provided with the second switch valve 311, and the second switch valve 311 can open or close the denitration channels 310. Specifically, when the amount of the mixed flue gas is small, several of the denitration channels 310 in the SCR denitration device 300 can be closed, so that the amount of the flue gas entering the SCR denitration device 300 is ensured to be large. This is more convenient to operate than closing both the first branch duct 120 and the second branch duct 220.
Meanwhile, an air preheater may be disposed in the second branch duct 220, and the air preheater may heat up the flue gas in the second branch duct 220. In a specific working process, when the heating of the mixed flue gas is poor due to the small amount of flue gas in the first branch pipe 120, the air preheater can heat the flue gas in the second branch pipe 220, so that the flue gas input into the denitration channel 310 can always meet the required flue gas temperature for denitration, and finally the denitration rate of the SCR denitration device 300 is improved.
The utility model discloses an embodiment, in order to prevent to influence the denitration effect of SCR denitrification facility 300 to the flue gas because the flue gas volume that discharges in the main boiler is less, a plurality of second branch pipes 220 all can be provided with third ooff valve 221, and is concrete, when the flue gas volume in second branch pipe 220 is less, can be through closing several of them third ooff valves 221 to it is great to guarantee to get into the flue gas volume of SCR denitrification facility 300, and then improves the denitration rate of SCR denitrification facility 300.
The embodiment of the utility model discloses in the utility boiler system, first ooff valve 121 on the first branch pipeline 120 can be opened or closed through the manpower, of course, in order to improve the automation of utility boiler system, and prevent the overload work of manpower, the power station filter equipment can also include first controller and the first discharge monitoring device with a plurality of first branch pipelines 120 one-to-one, first discharge monitoring device sets up in corresponding first branch pipeline 120, first controller links to each other with first discharge monitoring device and first ooff valve 121, first discharge monitoring device is used for detecting the actual flue gas discharge capacity of corresponding first branch pipeline 120, and is concrete, when the actual discharge capacity in first branch pipeline 120 is less than first warning threshold value, first controller control first ooff valve 121 closes, thereby improve SCR denitrification facility 300's denitration rate.
Similarly, the third on-off valve 221 on the second branch pipe 220 may also be opened or closed by manpower, and of course, in order to improve automation of the boiler system of the power station and prevent overload operation of manpower, the power station filtering apparatus may further include a second controller and a second displacement detecting device in one-to-one correspondence with the plurality of second branch pipes 220, the second displacement detecting device is disposed in the corresponding second branch pipe 220, the second controller is connected to the second displacement detecting device and the third on-off valve 221, and the second displacement detecting device is configured to detect actual flue gas displacement of the corresponding second branch pipe 220, specifically, when the actual flue gas displacement in the second branch pipe 220 is smaller than a second alarm threshold, the second controller controls the third on-off valve 221 to be closed, so as to improve the denitration rate of the SCR denitration device 300.
The utility model discloses what the key description in the above embodiment is different between each embodiment, and different optimization characteristics are as long as not contradictory between each embodiment, all can make up and form more preferred embodiment, consider that the literary composition is succinct, then no longer describe here.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a power station boiler system, its characterized in that, including start-up boiler, main boiler, gas cleaning device, first intercommunication flue (100) and second intercommunication flue (200), start-up boiler has first exhanst gas outlet, main boiler has the second exhanst gas outlet, first intercommunication flue (100) intercommunication first exhanst gas outlet with gas cleaning device, second intercommunication flue (200) intercommunication second exhanst gas outlet with gas cleaning device.
2. The utility boiler system according to claim 1, characterized in that the flue gas cleaning device comprises an SCR denitration device (300), the first communication flue (100) communicating the first flue gas outlet with the SCR denitration device (300), the second communication flue (200) communicating the second flue gas outlet with the SCR denitration device (300).
3. The utility boiler system according to claim 1, characterized in that the first (100) and the second (200) communicating flues are provided with induced draft fans.
4. The utility boiler system according to claim 2, characterized in that the SCR denitration device (300) comprises a plurality of denitration channels (310);
the first communicating flue (100) comprises a first main pipeline and a plurality of first branch pipelines (120) which are in one-to-one correspondence with the denitration channels (310), wherein the first ends of the first branch pipelines (120) are communicated with the first ends of the first main pipeline, the second ends of the first main pipeline are communicated with the first flue gas outlet, and the second ends of the first branch pipelines (120) are communicated with the corresponding denitration channels (310);
the second communicating flue (200) comprises a second main pipeline (210) and a plurality of second branch pipelines (220) corresponding to the denitration channels (310) one to one, the first ends of the second branch pipelines (220) are communicated with the first ends of the second main pipeline (210), the second ends of the second main pipeline (210) are communicated with the second flue gas outlet, the second ends of the second branch pipelines (220) are communicated with the denitration channels (310) corresponding to the second ends, and the first branch pipelines (120) are provided with first switch valves (121).
5. The utility boiler system according to claim 4, characterized in that the second end of the first branch duct (120) is connected between the two ends of the second branch duct (220) and communicates with the denitration channel (310) through the second branch duct (220).
6. The utility boiler system according to claim 5, characterized in that a second switch valve (311) is provided at the communication of the denitration channel (310) and the second branch duct (220).
7. The utility boiler system according to claim 5, characterized in that an air preheater is arranged in the second branch duct (220).
8. The utility boiler system according to claim 4, characterized in that a plurality of the second branch ducts (220) are each provided with a third on/off valve (221).
9. The utility boiler system according to claim 8, characterized in that it further comprises a second controller and a second displacement detecting device corresponding to a plurality of the second branch pipes (220), the second displacement detecting device is arranged in the corresponding second branch pipe (220), the second controller is connected with the second displacement detecting device and the third on-off valve (221), the second displacement detecting device is used for detecting the actual smoke displacement of the corresponding second branch pipe (220), and when the actual smoke displacement is smaller than a second alarm threshold, the second controller controls the third on-off valve (221) to close.
10. The utility boiler system according to claim 4, characterized in that the utility boiler system further comprises a first controller and a first discharge monitoring device corresponding to the plurality of first branch pipes (120), wherein the first discharge monitoring device is arranged in the corresponding first branch pipe (120), the first controller is connected with the first discharge monitoring device and the first switch valve (121), the first discharge monitoring device is used for detecting the actual smoke discharge of the corresponding first branch pipe (120), and when the actual smoke discharge is smaller than a first alarm threshold value, the first controller controls the first switch valve (121) to be closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921656829.1U CN210601684U (en) | 2019-09-30 | 2019-09-30 | Power station boiler system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921656829.1U CN210601684U (en) | 2019-09-30 | 2019-09-30 | Power station boiler system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210601684U true CN210601684U (en) | 2020-05-22 |
Family
ID=70697519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921656829.1U Active CN210601684U (en) | 2019-09-30 | 2019-09-30 | Power station boiler system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210601684U (en) |
-
2019
- 2019-09-30 CN CN201921656829.1U patent/CN210601684U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107014217B (en) | Coke oven gas utilization and flue gas treatment system of coking plant and treatment method thereof | |
| CN104801174A (en) | Activated coke flue gas purification system | |
| CN202096885U (en) | Multistage backheating type low-concentration gas heat reflux catalytic oxidation device | |
| CN205316350U (en) | Use double -valve structure's RTO system | |
| CN110354772A (en) | A kind of flue gas directly draws denitration urea pyrolysis device and method | |
| CN210601684U (en) | Power station boiler system | |
| CN103320561A (en) | Hot-blast stove system for high air temperature by using pure blast furnace gas and method thereof | |
| CN202993536U (en) | Coal-fired hot blast furnace set with waste heat boiler | |
| CN105194990A (en) | Flue gas comprehensive management system applicable to coke refining oven | |
| CN210088912U (en) | Tubular air preheater capable of preventing ammonium bisulfate from being blocked | |
| CN102322692A (en) | Tail gas heat utilization method for low-concentration gas heat countercurrent catalytic oxidation apparatus | |
| CN103941764B (en) | A kind of glass kiln power generation boiler by waste denitration temperature control equipment | |
| CN203224140U (en) | Efficient energy-saving combustion apparatus of casting annealing furnace | |
| CN114018064A (en) | Steel rolling heating furnace flue gas CO emission reduction and waste heat recovery synergistic ultralow emission process | |
| CN209221872U (en) | A kind of recuperative heater flue gas denitrification system of two-stage accumulation of heat | |
| CN211823129U (en) | Hot-blast stove | |
| CN110118362B (en) | Tubular air preheater capable of preventing ammonium bisulfate from being blocked | |
| CN209271187U (en) | Denitration reaction device and smoke processing system | |
| CN209763048U (en) | Graded heat accumulating type heating furnace | |
| CN208082232U (en) | It is a kind of can on-line maintenance low temperature SCR denitration reactor | |
| CN210051192U (en) | Boiler heat recycling device | |
| CN205505032U (en) | Heat accumulating type catalytic oxidation device | |
| CN201155799Y (en) | Plaster board organic heat carrier heating stove residual heat utilization device | |
| CN207351232U (en) | A kind of coking flue gas purification system | |
| CN218795099U (en) | Efficient flue gas heat recovery system applied to low-temperature SCR denitration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |