CN202851401U - Primary fan of circulating fluidized bed boiler - Google Patents
Primary fan of circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN202851401U CN202851401U CN 201220493956 CN201220493956U CN202851401U CN 202851401 U CN202851401 U CN 202851401U CN 201220493956 CN201220493956 CN 201220493956 CN 201220493956 U CN201220493956 U CN 201220493956U CN 202851401 U CN202851401 U CN 202851401U
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- CN
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- motor
- circuit breaker
- fluidized bed
- circulating fluidized
- bed boiler
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Abstract
The utility model discloses a primary fan of a circulating fluidized bed boiler. The primary fan comprises a motor, a primary fan body and a converter, wherein the primary fan body and the converter are connected with the motor, the primary fan body is connected with the circulating fluidized bed boiler through an air pipe, and the motor is connected with the converter. Due to the frequency conversion function of the converter, the rotating speed of the motor is adjusted, air quantity of the primary fan body can be controlled according to load changes of the circulating fluidized bed boiler, adjustment is convenient, and power resource waste caused by the adjustment through air door baffles is effectively reduced. Besides, due to frequency control of the converter, current started by the motor begins to increase stably from zero, adverse impact on the motor due to overlarge transient current when the motor is started in the prior art is prevented, and service life of the motor is prolonged.
Description
Technical field
The utility model relates to a kind of boiler equipment, is specifically related to a kind of circulating fluidized bed boiler primary air fan.
Background technique
Existing power plant circulating fluidized bed boiler primary air fan adopts centrifugal fan usually, its motor mainly moves by the constant speed mode and regulates air quantity by damper, its output power can not change with boiler load, can only adjust by the aperture that changes damper, not only regulate inconvenience and also can waste electric power resource; In addition, during electric motor starting, inrush current is large, and is large to electromechanical shock, has a strong impact on insulating property and the working life of motor.
Summary of the invention
The purpose of this utility model provides a kind of circulating fluidized bed boiler primary air fan, utilizes damper to regulate air quantity and the problem of the electric power resource waste that causes to solve prior art.
The technological scheme that the utility model adopts is: a kind of circulating fluidized bed boiler primary air fan, comprise motor and the primary air fan that is connected with described motor, and described primary air fan is connected with circulating fluidized bed boiler by airduct, and described motor is connected with frequency variator.
Described frequency variator is high voltage converter.
This circulating fluidized bed boiler primary air fan also is provided with power circuit breaker, described power circuit breaker comprises power circuit breaker I, power circuit breaker II and power circuit breaker III, described power circuit breaker II is arranged between power circuit breaker I and the described frequency variator, and described power circuit breaker III is arranged between described frequency variator and the described motor and with described power circuit breaker I and is connected.
Described power circuit breaker III is single-pole double-throw switch (SPDT).
The beneficial effects of the utility model are:
1, the utility model is connected motor with frequency variator, by the frequency conversion function of frequency variator, the rotating speed of regulating electric machine is according to the air quantity of the load variations of circulating fluidized bed boiler control primary air fan, easy to adjust, effectively saved the electric power resource waste that utilizes the damper adjusting and cause.
2, the utility model is by the frequency control of motor speed of frequency variator, the level and smooth rising so that the electric motor starting electric current is started from scratch avoided the excessive unfavorable impact to motor of electric motor starting immediate current, prolonged the working life of motor, reduce the maintenance workload of motor, save the repair and maintenance expense.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Among the figure, 1. power circuit breaker I, 2. power circuit breaker II, 3. frequency variator, 4. power circuit breaker III, 5. motor, 6. primary air fan, 7. circulating fluidized bed boiler.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
A kind of circulating fluidized bed boiler primary air fan referring to Fig. 1, comprises power circuit breaker, frequency variator 3, motor 5 and the primary air fan 6 that is connected with motor, and primary air fan 6 is connected with circulating fluidized bed boiler 7 by airduct, and frequency variator 3 is connected with motor 5; Power circuit breaker comprises power circuit breaker I1, power circuit breaker II2 and power circuit breaker III4, power circuit breaker II2 is arranged between power circuit breaker I1 and the frequency variator 3, power circuit breaker III4 is single-pole double-throw switch (SPDT), is arranged between frequency variator 3 and the motor 5 and with power circuit breaker I1 to be connected.Frequency variator 3 is high voltage converter, and voltage rating is pressed and to be 6kV, on be limited to 50Hz, lower limit 0Hz.
The utility model has two kinds of working staties: variable frequency work state and power frequency working state, frequency variator 3 are in the converting operation state when normal, be in the power frequency operation state when unusual.During converting operation, first deenergization circuit breaker I1, powered-down circuit breaker II2 is incorporated into power circuit breaker III4 frequency conversion position b again, then moves frequency variator 3, powered-down circuit breaker I1 after frequency variator 3 chargings are finished, frequency variator 3 translators 5 converting operations.When the converting operation state switches to the power frequency operation state, stop first frequency variator 3, frequency variator 3 frequencies are down to deenergization circuit breaker I1 behind the 0Hz, again power circuit breaker III4 is incorporated into power frequency position a, deenergization circuit breaker II2, last powered-down circuit breaker I1, motor 5 power frequency operations.
The utility model is connected motor with frequency variator, by the frequency conversion function of frequency variator 3, the rotating speed of regulating electric machine 5 is according to the air quantity of circulating fluidized bed boiler 7 load variations control primary air fan 6, easy to adjust, effectively saved the electric power resource waste that utilizes the damper adjusting and cause.In addition, by the frequency control of motor speed of frequency variator 3, the inrush current of motor 5 is started from scratch and is smoothly risen, avoided prior art motor 5 to start the excessive unfavorable impact to motor of immediate current, prolong the working life of motor, reduced the maintenance workload of motor, saved the repair and maintenance expense.
Claims (4)
1. circulating fluidized bed boiler primary air fan, comprise motor (5) and the primary air fan (6) that is connected with described motor, described primary air fan (6) is connected with circulating fluidized bed boiler (7) by airduct, it is characterized in that: described motor (5) is connected with frequency variator (3).
2. circulating fluidized bed boiler primary air fan according to claim 1, it is characterized in that: described frequency variator (3) is high voltage converter.
3. circulating fluidized bed boiler primary air fan according to claim 1 and 2, it is characterized in that: also be provided with power circuit breaker, described power circuit breaker comprises power circuit breaker I(1), power circuit breaker II(2) and power circuit breaker III(4), described power circuit breaker II(2) be arranged on power circuit breaker I(1) and described frequency variator (3) between, described power circuit breaker III(4) be single-pole double-throw switch (SPDT), and be arranged between described frequency variator (3) and the described motor (5) and with described power circuit breaker I(1) be connected.
4. circulating fluidized bed boiler primary air fan according to claim 3 is characterized in that: described power circuit breaker III(4) be single-pole double-throw switch (SPDT).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220493956 CN202851401U (en) | 2012-09-25 | 2012-09-25 | Primary fan of circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220493956 CN202851401U (en) | 2012-09-25 | 2012-09-25 | Primary fan of circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202851401U true CN202851401U (en) | 2013-04-03 |
Family
ID=47982608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220493956 Expired - Fee Related CN202851401U (en) | 2012-09-25 | 2012-09-25 | Primary fan of circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202851401U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113566231A (en) * | 2021-09-06 | 2021-10-29 | 南京钢铁股份有限公司 | Energy-saving control method for combustion fan of heating furnace |
-
2012
- 2012-09-25 CN CN 201220493956 patent/CN202851401U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113566231A (en) * | 2021-09-06 | 2021-10-29 | 南京钢铁股份有限公司 | Energy-saving control method for combustion fan of heating furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130403 Termination date: 20130925 |