CN215174934U - Boiler system of cogeneration unit - Google Patents
Boiler system of cogeneration unit Download PDFInfo
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- CN215174934U CN215174934U CN202121057470.3U CN202121057470U CN215174934U CN 215174934 U CN215174934 U CN 215174934U CN 202121057470 U CN202121057470 U CN 202121057470U CN 215174934 U CN215174934 U CN 215174934U
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Abstract
The utility model provides a boiler system of cogeneration unit, including boiler system and No. two boiler systems, boiler system, No. two boiler systems all include the boiler, the air-supply line is provided with the fan, the end of air inlet pipeline is connected with the air inlet end of a wind pre-heater, the air-out end and the main air-supply line of a wind pre-heater are connected, main air inlet pipeline is connected with main primary air pipeline and multichannel combustor air-supply line, the end of main primary air pipeline is connected with the combustion chamber of boiler, the end and the corresponding start-up combustor of combustor air-supply line are connected, the main air inlet pipeline of boiler system passes through the main air-supply line connection of a wind tie pipe and No. two boiler systems, the wind tie pipe of heat is provided with two manual regulating valves, the wind tie pipe of heat is provided with electronic isolated valve between these two manual regulating valves. When one boiler is started in a cold state, primary hot air of the other boiler is used for heating bed materials of the cold start boiler, so that the cold start process of the boiler is more oil-saving.
Description
Technical Field
The utility model relates to a boiler system, concretely relates to boiler system of combined heat and power generation unit.
Background
The cogeneration project was primarily applied in the industrial field at the earliest time, and then developed to the central heating of residents. The company is provided with two sets of power generation and heat supply units, each set of unit is provided with a circulating fluidized bed boiler, each circulating fluidized bed boiler is provided with four under-bed starting burners at the lower part of a water-cooling air chamber, the starting burners use No. 0 light diesel oil, and an oil gun adopts a mechanical atomization mode. 6 belt weighing type coal feeders are arranged on the front wall of the boiler. The system is provided with a primary air preheater, when the system normally operates, the flue gas generated by the combustion of the circulating fluidized bed boiler exchanges heat with the air flowing through the primary air preheater, namely the flue gas heats the inlet air passing through the tube side of the primary air preheater, and the heated primary air passes through a main primary air pipeline to introduce the inlet air into a combustion chamber of the boiler for fluidizing bed materials; after the temperature of the bed material reaches 100 ℃, closing the main primary air pipeline, and heating the bed material by starting a burner; when the temperature of the bed material is more than 380 ℃, coal is put in; when the bed temperature reaches above 550 ℃, closing the starting burner, and continuing to introduce air into the starting burner at the moment; when the temperature of the bed material reaches above 700 ℃ and the temperature of the flue gas in the primary air preheater reaches above 200 ℃, the main primary air pipeline is opened again, and the air inlet of the burner is closed and started.
After the heating period in winter is finished, the two circulating fluidized bed boilers generally need to be stopped and overhauled in sequence, and the circulating fluidized bed boilers are started after the overhauling is finished. Due to the structural characteristics of the circulating fluidized bed boiler, the cold start oil consumption is large, on the premise of ensuring the safety of the boiler, how to reduce the cold start oil consumption is significant for improving the economy of the cold start process of the boiler. Meanwhile, the outdoor temperature in winter is low, namely the inlet air temperature of primary air is low, so that the smoke temperature of boiler smoke is reduced more after passing through the primary air preheater and sometimes reaches below the dew point temperature, sulfur dioxide, sulfur trioxide, oxygen and water vapor in the smoke react to generate sulfuric acid, and the preheater is corroded.
Disclosure of Invention
The utility model aims at overcoming the not enough of prior art existence, provide a reducible circulating fluidized bed boiler cold starting oil consumption, improve the boiler system of the combined heat and power units of boiler cold starting process economic nature.
The utility model discloses a realize through following technical scheme: a boiler system of a cogeneration unit comprises a boiler system and a boiler system II, wherein the boiler system I and the boiler system II respectively comprise a boiler, a starting burner arranged at the bottom of a combustion chamber of the boiler, a primary air preheater and an air inlet pipeline, the air inlet pipeline is provided with a fan, the tail end of the air inlet pipeline is connected with the air inlet end of the primary air preheater, the air outlet end of the primary air preheater is connected with a main air inlet pipeline, the main air inlet pipeline is connected with a main primary air pipeline and a multi-way burner air inlet pipeline, the tail end of the main primary air pipeline is connected with the combustion chamber of the boiler, the tail end of the burner air inlet pipeline is connected with the corresponding starting burner, the main primary air pipeline is provided with a main primary air valve, the burner air inlet pipeline is provided with a burner air inlet valve, the main air inlet pipeline of the boiler system I is connected with the main air inlet pipeline of the boiler system II through a primary hot air connecting pipe, the hot primary air connecting pipe is provided with a manual regulating valve and an electric isolation valve.
The hot primary air connecting pipe is provided with a metal expansion joint.
In the first boiler system and the second boiler system, the air outlet end of the primary air preheater is connected with a hot air recirculation pipeline, the tail end of the hot air recirculation pipeline is arranged on the air inlet side of the fan and connected with an air inlet pipeline, and the hot air recirculation pipeline is provided with a recirculation electric valve.
The air inlet end of the primary air preheater is further connected with an air inlet pipeline, a fan is arranged on the air inlet pipeline, the air outlet end of the primary air preheater is further connected with a hot air recirculation pipeline, the tail end of the hot air recirculation pipeline is connected with the air inlet pipeline on the air inlet side of the fan, and the hot air recirculation pipeline is provided with a recirculation electric valve.
And the front sections of the air inlet pipelines are provided with silencers.
The air inlet pipeline is provided with a first electric adjusting valve and a second electric adjusting valve, and the fan is located between the first electric adjusting valve and the second electric adjusting valve.
The utility model has the advantages that: the utility model discloses communicate the main air inlet pipeline of two adjacent boilers through hot primary air connecting pipe, when a boiler cold state starts, utilize the bed material of this cold state start-up boiler of a hot-blast heating of another boiler for this boiler cold state start-up process economizes on fuel more.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a first boiler; 2. a first system main primary air pipeline; 3. a system I main primary air valve; 4. starting a combustor by a first system; 5. a first system combustor air inlet pipeline; 6. an air inlet valve of a first system combustor; 7. a first system main air inlet pipeline; 8. a first system primary air preheater; 9. system one, a first muffler; 10. a first system second muffler; 11. a first air inlet pipeline of the first system; 12. a first fan of the first system; 13. a first electric adjusting valve of the first system; 14. a second electric adjusting valve of the first system; 15. a first system second air inlet pipeline; 16. a second fan of the first system; 17. a third electric valve of the first system; 18. the fourth electric valve of the first system; 19. a first system hot air recirculation pipeline; 20. a first system recirculation electrically operated valve; 21. a first system second hot air recirculation pipeline; 22. system one second recirculating electrically operated valve; 23. a second boiler; 24. the second system is a main primary air pipeline; 25. a second system main primary air valve; 26. starting a combustor by the second system; 27. a second system combustor air inlet pipeline; 28. an air inlet valve of a second system combustor; 29. a second system main air inlet pipeline; 30. a primary air preheater of the second system; 31. the second system is a first silencer; 32. a second muffler of the second system; 33. a first air inlet pipeline of the second system; 34. the second system is a first fan; 35. a first electric adjusting valve of the second system; 36. a second electric adjusting valve of the second system; 37. a second air inlet pipeline of the second system; 38. a second fan of the second system; 39. a third electric valve of the second system; 40. a fourth electric valve of the second system; 41. a second system first hot air recirculation pipeline; 42. a first recycling electric valve of the second system; 43. a second hot air recirculation pipeline of the second system; 44. system two second recirculating electrically operated valves; 45. a hot primary air communication pipe; 46. electrically isolating the valve; 47. a first manual regulating valve; 48. a second manual adjustment valve.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, a boiler system of a cogeneration unit comprises a first boiler 1 system and a second boiler 23 system, the first boiler 1 system comprises a first boiler 1, a first system start-up burner 4 and a first system primary air preheater 8 which are arranged at the bottom of a combustion chamber of the first boiler 1, and a first system first air inlet pipeline 11, the first system first air inlet pipeline 11 is provided with a first system first fan 12, the tail end of the first system first air inlet pipeline 11 is connected with an air inlet of the first system primary air preheater 8, an air outlet of the first system primary air 8 is connected with a first system main air inlet pipeline 7, the first system main air inlet pipeline 7 is connected with a first system main primary air pipeline 2 and a first system burner air inlet pipeline 5, the tail end of the first system main primary air pipeline 2 is connected with the combustion chamber of the first boiler 1, the tail end of the first system burner air inlet pipeline 5 is connected with the first system start-up burner 4, the first system main primary air pipeline 2 is provided with a first system main primary air valve 3, the first system burner air inlet pipeline 5 is provided with a first system burner air inlet valve 6, the second boiler 23 system comprises a second boiler 23, a second system starting burner 26 arranged at the bottom of a combustion chamber of the second boiler 23, a second system primary air preheater 30 and a second system first air inlet pipeline 33, the second system first air inlet pipeline 33 is provided with a second system first fan 34, the tail end of the second system first air inlet pipeline 33 is connected with an air inlet of the second system primary air preheater 30, an air outlet of the second system primary air preheater 30 is connected with a second system main air inlet pipeline 29, the second system main air inlet pipeline 29 is connected with the second system main primary air pipeline 24 and a second system burner pipeline 27, the tail end of the second system main primary air pipeline 24 is connected with the combustion chamber of the second boiler 23, the tail end of a second system combustor air inlet pipeline 27 is connected with a second system start combustor 26, a second system main primary air pipeline 24 is provided with a second system main primary air valve 25, a second system combustor air inlet pipeline 27 is provided with a second system combustor air inlet valve 28, a second system main air inlet pipeline 29 is connected with a second system main air inlet pipeline 29 through a primary hot air connecting pipe 45, and the primary hot air connecting pipe 45 is provided with a first manual adjusting valve 47, a second manual adjusting valve 48 and an electric isolation valve 46.
The utility model discloses communicate the main air inlet pipeline of two adjacent boilers through hot primary air contact pipe 45, when a boiler cold state starts, utilize the bed material of this cold state start-up boiler of a hot-blast heating of another boiler. When the bed temperature reaches above 700 ℃ and the preheater flue gas temperature is above 200 ℃, the hot primary air connection is closed.
Practice proves that during primary hot air connection operation, as long as the first manual regulating valve 47 and the second manual regulating valve 48 are adjusted timely and slowly, primary air pressure, air quantity and temperature change are ensured to be as gentle as possible, influence on the boiler is not large, and unstable boiler combustion caused by primary air connection cannot occur. After the two boilers are communicated by primary hot air, the primary air temperature when the boilers are started is improved, the ignition oil feeding time of the boilers is shortened, fuel oil is saved, and the energy-saving effect is obvious.
Can each other be for each other after the primary air liaison of two boilers spare, when a boiler leads to the amount of wind not enough because of reasons such as primary air fan trouble, air heater air leakage, can supply through adjacent stove primary air, improve unit security. And the boiler is dried and maintained by using primary hot air of an adjacent boiler during the shutdown period of the boiler, so that the service life of the boiler is prolonged. During the blowing out period in winter, the adjacent boiler heats the boiler body by primary hot air, thereby playing the anti-freezing effect.
The hot primary air connecting pipe 45 is provided with a metal expansion joint for compensating the expansion of the hot primary air connecting pipe 45 after the hot primary air enters.
An air outlet of the first-system primary air preheater 8 is connected with a first-system first hot air recirculation pipeline 19, the tail end of the first-system first hot air recirculation pipeline 19 is connected with a first-system first air inlet pipeline 11 on the air inlet side of a first-system first fan 12, and the first-system first hot air recirculation pipeline 19 is provided with a first-system first recirculation electric valve 20; an air outlet of the second-system primary air preheater 30 is connected with a second-system first hot air recirculation pipeline 41, the tail end of the second-system first hot air recirculation pipeline 41 is connected with a second-system first air inlet pipeline 33 on the air inlet side of a second-system first fan 34, and the second-system first hot air recirculation pipeline 41 is provided with a second-system first recirculation electric valve 42. The outdoor temperature is lower winter, and the inlet air temperature is lower, with the hot-blast partial return of the distolateral hot-blast of air-out of primary air preheater to the inlet air pipeline, can improve the inlet air temperature, avoid the air inlet to make the interior flue gas temperature of primary air preheater lower, avoid sulfur dioxide, oxygen, the vapor in the inside flue gas of primary air preheater to react, can not generate sulphuric acid corrosion preheater.
The air inlet of the first system primary air preheater 8 is also connected with a first system second air inlet pipeline 15, the first system second air inlet pipeline 15 is provided with a first system second fan, the air outlet of the first system primary air preheater 8 is also connected with a first system second hot air recirculation pipeline 21, the tail end of the first system second hot air recirculation pipeline 21 is connected with the first system second air inlet pipeline 15 at the air inlet side of the first system second fan, and the first system second hot air recirculation pipeline 21 is provided with a first system second recirculation electric valve 22; the air inlet of the second system primary air preheater 30 is also connected with a second system air inlet pipeline 37, the second system air inlet pipeline 37 is provided with a second system fan 38, the air outlet of the second system primary air preheater 30 is also connected with a second system hot air recirculation pipeline 43, the tail end of the second system hot air recirculation pipeline 43 is connected with the second system air inlet pipeline 37 on the air inlet side of the second system fan 38, and the second system hot air recirculation pipeline 43 is provided with a second system recirculation electric valve 44. When the bed temperature reaches above 700 ℃ and the preheater flue gas temperature is above 200 ℃, the first system second fan and the second system second fan 38 are started to increase the air intake.
The front section of the first system first air inlet pipeline 11 is provided with a first system first silencer 9, the front section of the first system second air inlet pipeline 15 is provided with a first system second silencer 10, the front section of the second system first air inlet pipeline 33 is provided with a second system first silencer 31, and the front section of the second system second air inlet pipeline 37 is provided with a second system second silencer 32.
The first system first air inlet pipeline 11 is provided with a first system first electric adjusting valve 13 and a first system second electric adjusting valve 14, and the first system first fan 12 is positioned between the first system first electric adjusting valve 13 and the first system second electric adjusting valve 14; the first system second air inlet pipeline 15 is provided with a first system third electric valve 17 and a first system fourth electric valve 18, and the first system second air blower 16 is positioned between the first system third electric valve 17 and the first system fourth electric valve 18; the second system first air inlet pipeline 33 is provided with a second system first electric adjusting valve 35 and a second system second electric adjusting valve 36, and the second system first fan 34 is positioned between the second system first electric adjusting valve 35 and the second system second electric adjusting valve 36; the second air inlet pipeline 37 of the second system is provided with a third electric valve 39 of the second system and a fourth electric valve 40 of the second system, and the second fan 38 of the second system is positioned between the third electric valve 39 of the second system and the fourth electric valve 40 of the second system.
It should be finally noted that the above only serves to illustrate the technical solution of the present invention, and not to limit the scope of the present invention, and that simple modifications or equivalent replacements performed by those skilled in the art to the technical solution of the present invention do not depart from the spirit and scope of the technical solution of the present invention.
Claims (6)
1. The utility model provides a boiler system of combined heat and power units, includes boiler system and No. two boiler systems, boiler system No. two boiler systems all include the boiler, set up in four start-up combustors, a primary air preheater and the air-supply line of the combustion chamber bottom of boiler, and the air-supply line is provided with the fan, and the end of air-supply line is connected with a primary air preheater's air inlet end, and a primary air preheater's air-out end is connected with main air-supply line, and main air-supply line is connected with main primary air pipeline and multichannel combustor air-supply line, main primary air pipeline's end with the combustion chamber of boiler is connected, the end of combustor air-supply line with corresponding start-up combustor is connected, main primary air pipeline is provided with main primary air valve, combustor air-supply line is provided with combustor air inlet valve, its characterized in that: the main air inlet pipeline of the first boiler system is connected with the main air inlet pipeline of the second boiler system through a hot primary air connecting pipe, and the hot primary air connecting pipe is provided with a manual adjusting valve and an electric isolation valve.
2. Boiler system of a cogeneration unit according to claim 1, characterized in that: the hot primary air connecting pipe is provided with a metal expansion joint.
3. Boiler system of a cogeneration unit according to claim 2, characterized in that: in the first boiler system and the second boiler system, the air outlet end of the primary air preheater is connected with a hot air recirculation pipeline, the tail end of the hot air recirculation pipeline is arranged on the air inlet side of the fan and connected with an air inlet pipeline, and the hot air recirculation pipeline is provided with a recirculation electric valve.
4. Boiler system of a cogeneration unit according to claim 3, characterized in that: the air inlet end of the primary air preheater is further connected with an air inlet pipeline, a fan is arranged on the air inlet pipeline, the air outlet end of the primary air preheater is further connected with a hot air recirculation pipeline, the tail end of the hot air recirculation pipeline is connected with the air inlet pipeline on the air inlet side of the fan, and the hot air recirculation pipeline is provided with a recirculation electric valve.
5. Boiler system of a cogeneration unit according to claim 4, characterized in that: and the front sections of the air inlet pipelines are provided with silencers.
6. Boiler system of a cogeneration unit according to claim 5, characterized in that: the air inlet pipeline is provided with a first electric adjusting valve and a second electric adjusting valve, and the fan is located between the first electric adjusting valve and the second electric adjusting valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121057470.3U CN215174934U (en) | 2021-05-18 | 2021-05-18 | Boiler system of cogeneration unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121057470.3U CN215174934U (en) | 2021-05-18 | 2021-05-18 | Boiler system of cogeneration unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215174934U true CN215174934U (en) | 2021-12-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121057470.3U Expired - Fee Related CN215174934U (en) | 2021-05-18 | 2021-05-18 | Boiler system of cogeneration unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215174934U (en) |
-
2021
- 2021-05-18 CN CN202121057470.3U patent/CN215174934U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211214 |
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| CF01 | Termination of patent right due to non-payment of annual fee |