CN217928741U - Boiler part flue gas recycle system - Google Patents
Boiler part flue gas recycle system Download PDFInfo
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- CN217928741U CN217928741U CN202222366908.7U CN202222366908U CN217928741U CN 217928741 U CN217928741 U CN 217928741U CN 202222366908 U CN202222366908 U CN 202222366908U CN 217928741 U CN217928741 U CN 217928741U
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Abstract
The utility model discloses a boiler part flue gas recycling system, which relates to the technical field of boiler flue gas treatment, and comprises a boiler body, a flue gas pipeline, a dust remover, an air pipeline, an induced draft fan and an air blower, wherein a flue gas outlet at the upper part of the boiler body is connected with one end of the flue gas pipeline, the other end of the flue gas pipeline is connected with an inlet of the dust remover, and an outlet of the dust remover is connected with an inlet of the induced draft fan; an air port at the lower part of the boiler body is connected with one end of an air pipeline, the other end of the air pipeline is connected with an air outlet end of an air blower, and an outlet end of the induced draft fan is connected with a flue gas discharge pipe; the utility model discloses a mode that air and flue gas mix entering boiler not only can be through the proportion of control flue gas and air and adjust the oxygen content that gets into the boiler, and the backward flow that partly has the flue gas of uniform temperature has moreover reached the recovery purpose of waste heat, has also reduced the discharge of flue gas simultaneously.
Description
Technical Field
The utility model relates to a boiler flue gas handles technical field, specifically is a boiler part flue gas recycle system.
Background
Under the large environment that the energy utilization of energy conservation and emission reduction is vigorously advocated in China, people pay great attention to the research on the treatment and the reutilization of the flue gas of the boiler, and the treatment work of the flue gas generated by the boiler is strengthened at present, for example, the flue gas is desulfurized through absorption tower equipment until the flue gas reaches the standard, the waste heat of the flue gas is recycled through adding a convection beam tube, and the like, so that the energy conservation and emission reduction are realized.
However, there are still further enhancements or optimizations to the existing boiler flue gas treatment and utilization systems:
1. the combustion of boiler fuel and the circulation of smoke inside the boiler fuel need the blowing flow of external air, the injection amount of the external air affects the oxygen content of the boiler operation, the oxygen content directly affects the use of the boiler, the oxygen content is too low, the fuel combustion is insufficient, the oxygen content is too high, the conversion concentration of nitrogen oxide or sulfur dioxide is also high, more denitration agents or desulfurization agents are needed, the waste of the agents is caused, the wind power is needed to be reduced when the oxygen content of the existing system is reduced through the wind power of a blower, but the reduction of the wind power enables the smoke exhaust speed of a smoke exhaust system of the boiler to be slowed down, the desulfurization or denitration work of a subsequent absorption tower is affected, and therefore the adjusting mode of the oxygen content can be optimized;
2. still have the uniform temperature when the flue gas is discharged, still have the waste of heat energy, simultaneously, no matter be desulfurization or denitration, still increase the waste heat recovery to the pencil pipe, can not reduce the final discharge amount of flue gas, consequently the reduction of flue gas waste heat recovery and discharge amount remains to be further improved.
SUMMERY OF THE UTILITY MODEL
The utility model provides a boiler part flue gas recycle system, through the mode that air and flue gas mix the entering boiler, not only can adjust the oxygen content that gets into the boiler through the proportion of control flue gas and air, partly has the backward flow of the flue gas of uniform temperature to reach the recovery purpose of waste heat moreover, has also reduced the discharge of flue gas simultaneously.
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a boiler part flue gas recycling system comprises a boiler body, a flue gas pipeline, a dust remover, an air pipeline, an induced draft fan and an air blower, wherein a flue gas outlet in the upper part of the boiler body is connected with one end of the flue gas pipeline, the other end of the flue gas pipeline is connected with an inlet of the dust remover, and an outlet of the dust remover is connected with an inlet of the induced draft fan; the air port of boiler body lower part is connected with air conduit's one end, air conduit's the other end is connected with the air-out end of air-blower, the draught fan exit end is connected with the flue gas discharge pipe, the UNICOM is provided with the flue gas discharge bleeder on the flue gas discharge pipe, the entry end of air-blower is connected with the air admission pipe, the UNICOM is provided with the flue gas and gets into the bleeder on the air admission pipe, the flue gas get into the bleeder with be connected with flue gas communicating pipe between the flue gas discharge bleeder, be provided with flue gas flow control valve on the flue gas communicating pipe.
Preferably, the flue gas communicating pipe uses a steel pipe with the diameter of 400 mm.
Preferably, an air control main valve is arranged on the air pipeline.
Preferably, an oxygen detector is arranged on the flue gas pipeline.
Preferably, the oxygen detector and the flue gas flow control valve are connected with an external controller through leads.
The utility model provides a boiler part flue gas recycle system possesses following beneficial effect:
1. the utility model discloses a mode that air and flue gas mix entering boiler not only can be through the proportion of control flue gas and air and adjust the oxygen content that gets into the boiler, and the backward flow that partly has the flue gas of uniform temperature has moreover reached the recovery purpose of waste heat, has also reduced the discharge of flue gas simultaneously.
2. The utility model discloses well oxygen detector and flue gas flow control valve are through outer flow control who links controller automatic control flue gas flow control valve, and control is more accurate, and need not personnel's guard, uses manpower sparingly.
Drawings
Fig. 1 is a schematic diagram of a partial flue gas recycling system of a boiler of the utility model.
In the figure: 1. a boiler body; 2. a flue gas duct; 3. a dust remover; 4. an induced draft fan; 5. a flue gas discharge pipe; 6. a flue gas communicating pipe; 7. a blower; 8. an air inlet pipe; 9. an air duct; 10. an oxygen detector; 51. the flue gas is discharged out of the branch pipe; 61. a flue gas flow control valve; 71. the flue gas enters a branch pipe; 91. the air controls the main valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, 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.
As shown in fig. 1, a partial flue gas recycling system of a boiler comprises a boiler body 1, a flue gas pipeline 2, a dust remover 3, an air pipeline 9, an induced draft fan 4 and an air blower 7, wherein a flue gas outlet at the upper part of the boiler body 1 is connected with one end of the flue gas pipeline 2, the other end of the flue gas pipeline 2 is connected with an inlet of the dust remover 3, and an outlet of the dust remover 3 is connected with an inlet of the induced draft fan 4; an air port at the lower part of the boiler body 1 is connected with one end of an air pipeline 9, the other end of the air pipeline 9 is connected with an air outlet end of an air blower 7, an outlet end of the induced draft fan 4 is connected with a flue gas discharge pipe 5, a flue gas discharge branch pipe 51 is communicated with the flue gas discharge pipe 5, an inlet end of the air blower 7 is connected with an air inlet pipe 8, a flue gas inlet branch pipe 71 is communicated with the air inlet pipe 8, a flue gas communicating pipe 6 is connected between the flue gas inlet branch pipe 71 and the flue gas discharge branch pipe 51, and a flue gas flow control valve 61 is arranged on the flue gas communicating pipe 6; the flue gas communicating pipe 6 is a steel pipe with the diameter of 400 mm; an air control main valve 91 is arranged on the air pipeline 9; an oxygen detector 10 is arranged on the flue gas pipeline 2; the oxygen detector 10 and the flue gas flow control valve 61 are connected with an external controller through leads.
The detailed connection means is a technique known in the art, and the following main description is provided for the working principle and process, and specifically provided for the following:
the utility model discloses well flue gas discharge pipe 5 is connected with outside flue gas treatment facility, and air admission pipe 8 is connected with air cleaner, above for this field known technique.
As shown in fig. 1, the present invention provides oxygen for fuel combustion by sucking air from outside through an air inlet pipe 8 connected with an air blower 7, and allowing the oxygen in the boiler body 1 to be smoothly discharged, wherein the flue gas in the boiler body 1 enters a dust collector 3 through a flue gas pipe 2, and the flue gas is simply dedusted, sucked from the dust collector 3 through an induced draft fan 4, and discharged from a flue gas discharge pipe 5 connected with the induced draft fan 4 to enter and exit the next equipment, because the flue gas discharge pipe 5 is provided with a flue gas discharge branch pipe 51, the air inlet pipe 8 is provided with a flue gas inlet branch pipe 71, and a flue gas communicating pipe 6 is connected between the flue gas inlet branch pipe 71 and the flue gas discharge branch pipe 51, the flue gas communicating pipe 6 is provided with a flue gas flow control valve 61 capable of controlling the flow, during normal operation, the flue gas flow control valve 61 is adjusted to a medium flow, therefore, when the air is blown into the boiler body 1 by the air blower 7, a part of the air enters the air inlet pipe 8, a part of the flue gas is a flue gas flow control valve 61 capable of controlling the flue gas flow of reducing the flue gas temperature and the flue gas exhaust ratio of the boiler body 1, and the flue gas exhaust ratio of the air is also reduced, and the flue gas exhaust ratio of the boiler body 1 is reduced; the method specifically works as follows: because the oxygen content in the boiler body 1 influences the work of the system, and the oxygen content in the flue gas is extremely low compared with the oxygen content in the air, when the oxygen content in the boiler body 1 is too high, the flow of the flue gas flow control valve 61 on the flue gas communicating pipe 6 can be increased, so that the entering flue gas is increased, the air is reduced, the oxygen content of the mixed gas entering the boiler body 1 is reduced, the optimized reduction of the operation oxygen content is realized, and the method is also a mode capable of ensuring that the emission concentration of the boiler flue gas pollutants is ultralow; the wind power of the air blower 7 does not need to be adjusted in the process, so that the wind power entering the boiler body 1 cannot be influenced, the discharge of smoke of the boiler body 1 cannot be influenced, in addition, the temperature of the air blower for delivering the air to a hearth of the boiler is improved by the backflow utilization of low-oxygen hot smoke, the preheating time before cold air enters the boiler is shortened, and the heat efficiency of the boiler can be greatly improved.
Wherein, the flue gas communicating pipe 6 uses a steel pipe with the diameter of 400mm, and is firm and durable; an air control main valve 91 is arranged on the air pipeline 9, and can be adjusted when the exhaust speed in the boiler body 1 needs to be adjusted, and the change of the air inlet speed influences the exhaust speed in the boiler body 1; the flue gas pipeline 2 is provided with an oxygen detector 10 for monitoring the oxygen content of the boiler body 1 during flue gas discharge, and particularly, the oxygen detector 10 and the flue gas flow control valve 61 can be connected with an external controller through a lead, and the flow of the flue gas flow control valve 61 is automatically controlled according to the oxygen content detected by the oxygen detector 10.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A boiler partial flue gas recycling system comprises a boiler body (1), a flue gas pipeline (2), a dust remover (3), an air pipeline (9), an induced draft fan (4) and an air blower (7), wherein a flue gas outlet in the upper part of the boiler body (1) is connected with one end of the flue gas pipeline (2), the other end of the flue gas pipeline (2) is connected with an inlet of the dust remover (3), and an outlet of the dust remover (3) is connected with an inlet of the induced draft fan (4); the air port of boiler body (1) lower part is connected with the one end of air conduit (9), the other end of air conduit (9) is connected with the air-out end of air-blower (7), its characterized in that, draught fan (4) exit end is connected with flue gas discharge pipe (5), the UNICOM is provided with flue gas exhaust lateral pipe (51) on flue gas discharge pipe (5), the entry end of air-blower (7) is connected with air admission pipe (8), the UNICOM is provided with flue gas entering lateral pipe (71) on air admission pipe (8), flue gas entering lateral pipe (71) with be connected with flue gas communicating pipe (6) between flue gas exhaust lateral pipe (51), be provided with flue gas flow control valve (61) on flue gas communicating pipe (6).
2. The boiler part flue gas recycling system according to claim 1, wherein the flue gas communicating pipe (6) uses a steel pipe with a diameter of 400 mm.
3. The boiler partial flue gas recycling system according to claim 1, characterized in that an air control main valve (91) is arranged on the air duct (9).
4. The boiler partial flue gas recycling system according to claim 1, characterized in that said flue gas duct (2) is provided with an oxygen detector (10).
5. The boiler part flue gas recycling system according to claim 4, wherein the oxygen detector (10) and the flue gas flow control valve (61) are connected with an external controller through wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222366908.7U CN217928741U (en) | 2022-09-07 | 2022-09-07 | Boiler part flue gas recycle system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222366908.7U CN217928741U (en) | 2022-09-07 | 2022-09-07 | Boiler part flue gas recycle system |
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| CN217928741U true CN217928741U (en) | 2022-11-29 |
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| CN202222366908.7U Active CN217928741U (en) | 2022-09-07 | 2022-09-07 | Boiler part flue gas recycle system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116576575A (en) * | 2023-07-04 | 2023-08-11 | 连云港格瑞智慧能源科技有限公司 | Energy-saving consumption-reducing system for boiler and application method thereof |
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2022
- 2022-09-07 CN CN202222366908.7U patent/CN217928741U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116576575A (en) * | 2023-07-04 | 2023-08-11 | 连云港格瑞智慧能源科技有限公司 | Energy-saving consumption-reducing system for boiler and application method thereof |
| CN116576575B (en) * | 2023-07-04 | 2024-01-19 | 连云港格瑞智慧能源科技有限公司 | Boiler system and use method thereof |
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