CN206919049U - A kind of axial flow blower stall proof bypass circuit flue structure - Google Patents
A kind of axial flow blower stall proof bypass circuit flue structure Download PDFInfo
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- CN206919049U CN206919049U CN201720801471.1U CN201720801471U CN206919049U CN 206919049 U CN206919049 U CN 206919049U CN 201720801471 U CN201720801471 U CN 201720801471U CN 206919049 U CN206919049 U CN 206919049U
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- flue
- bypass circuit
- circuit flue
- electric adjustable
- axial flow
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a kind of axial flow blower stall proof bypass circuit flue structure, including connecting the bypass circuit flue (1) between air-introduced machine outlet section flue and air-introduced machine inducer flue, the vertical section of bypass circuit flue (1) is provided with electric adjustable section door (2) and temperature-detecting device (3), electric adjustable section door (2) is connected with controlling organization, the air circulation that regulation passes through bypass circuit flue (1) when being opened for bypass circuit flue (1), temperature-detecting device (3) is arranged on the top of electric adjustable section door (2), it is connected with controlling organization, the temperature internal for detecting bypass circuit flue (1).Implementation result of the present utility model is good, considerably improves the stall margin of safety of blower fan, ensure that the safe and stable operation of unit.
Description
Technical field
It the utility model is related to axial flow blower stall proof bypass circuit flue used in a kind of coal-fired plant flue gas system
Structure.
Background technology
Axial flow blower used in coal-fired plant flue gas system, because the performance curve with hump shape, stall are
Its intrinsic flow dynamic characteristic.
If axial flow blower causes blower fan actual motion point because type selecting is unreasonable or excessively high etc. reason of air and gas system resistance
Stall zone is approached, blower fan is without enough stall margins of safety, then easily cause blower fan that stall occurs.Fan stall can be brought necessarily
Risk safe for operation, it could even be possible to causing the substantial equipment accident such as leaf destruction, therefore, it is guarantee machine to avoid fan stall
The premise of group safe and stable operation.
Utility model content
The purpose of this utility model is on the premise of not transforming fan body equipment, there is provided a kind of axle stream wind
Machine stall proof bypass circuit flue structure, it sets stall proof bypass circuit flue between axial flow blower import and export, improves axle stream
The stall margin of safety of blower fan, fan operation point is set to be run all the time in high efficient district, so as to avoid blower fan from occurring in use
Stall.
To reach above-mentioned purpose, the utility model is adopted the following technical scheme that to realize：
A kind of axial flow blower stall proof bypass circuit flue structure, including connection is in air-introduced machine outlet section flue and air-introduced machine
Bypass circuit flue between inducer flue, the vertical section of bypass circuit flue are provided with electric adjustable section door and temperature detection dress
Put, electric adjustable section door is connected with controlling organization, the circulation that regulation passes through bypass circuit flue when being opened for bypass circuit flue
Air quantity, temperature-detecting device are arranged on the top of electric adjustable section door, and it is connected with controlling organization, for detecting bypass circuit flue
Internal temperature.
The utility model, which further improves, to be, bypass circuit flue is circular bypass circuit flue, electric adjustable section door
For circular motorized adjustment door.
The utility model, which further improves, to be, the metal close to electric adjustable section door is additionally provided with bypass circuit flue
Three-D compensator.
The utility model, which further improves, to be, is additionally provided with bypass circuit flue close to air-introduced machine inducer flue
Metal single-wave compensator, for absorbing the deflection of bypass circuit flue.
The utility model has following beneficial effect：
Before air-introduced machine bypass circuit flue duct retrofit, under 300MW operating modes, the stall margin of safety of blower fan is (slightly higher for 1.37
In the standard of fan stall margin of safety 1.3 as defined in fan industry standard)；Using utility model bypass circuit flue duct retrofit
Afterwards, under 300MW operating modes, when electric adjustable section door aperture is 80%, the stall margin of safety of blower fan actual measurement is 1.64；Same
Operating mode under, when electric adjustable section door aperture be 100% when, blower fan actual measurement stall margin of safety be 1.83.Therefore, this practicality is new
The implementation result of type is good, considerably improves the stall margin of safety of blower fan, ensure that the safe and stable operation of unit.
Brief description of the drawings
Fig. 1 is the utility model blower fan stall proof bypass circuit flue structure schematic diagram.
In figure：1- circle bypass circuit flues, 2- circle motorized adjustment doors, 3- temperature-detecting devices, 4- metals are three-dimensional to be mended
Repay device, 5- metal single-wave compensators.
Embodiment
The utility model is made further instructions below in conjunction with drawings and examples.
As shown in figure 1, a kind of axial flow blower stall proof bypass circuit flue structure of the utility model, including bypass circuit cigarette
Road 1, drawn from air-introduced machine outlet section flue, be connected into air-introduced machine inducer flue, the external diameter of circular bypass circuit flue is according to setting
Air circulation is counted to choose；Electric adjustable section door 2, it is arranged at the vertical section of bypass circuit flue, the electric adjustable section door and control machine
Structure is connected, the air circulation that regulation passes through cycle flue when being opened for bypass flue；Temperature-detecting device 3, it is arranged at bypass
The top of the vertical section electric adjustable section door of cycle flue, the temperature-detecting device are connected with controlling organization, are bypassed for detecting
Temperature inside cycle flue；And compensator, the compensator quantity are 2, are respectively arranged at electric adjustable section door 2 and are followed with bypass
Between annular smoke flue 1, air-introduced machine inlet flue duct and bypass circuit flue 1, for absorbing the deflection of bypass circuit flue 1.
Embodiment
Certain domestic 330MW units air-introduced machine is Axial Fan with Adjustable Vanes, and fan design parameter is：Air quantity
382.45m3/ s, total head 8500Pa, Access-Point Density 0.6918kg/m3.Because Fan Selection is unreasonable, blower fan is negative in more than 300MW
When lotus runs, often tack stall event, seriously affects the safe operation of unit.
For the stall problem of air-introduced machine, it is proposed that a kind of air-introduced machine stall proof bypass circuit flue structure, bypass flue
For circular flue, external diameter 1200mm, thickness 6mm.And it is configured with electric adjustable section door, temperature-detecting device and two according to Fig. 1
Individual metal compensator.
Utility model implementation result：Before air-introduced machine bypass circuit flue duct retrofit, under 300MW operating modes, the stall peace of blower fan
Full nargin is 1.37 (the slightly above standards of fan stall margin of safety 1.3 as defined in fan industry standard)；Using utility model
After bypass circuit flue duct retrofit, under 300MW operating modes, when electric adjustable section door aperture is 80%, the stall safety of blower fan actual measurement
Nargin is 1.64；Under same operating mode, when electric adjustable section door aperture is 100%, the stall margin of safety of blower fan actual measurement is
1.83.Therefore, the implementation result of utility model is good, considerably improves the stall margin of safety of blower fan, ensure that unit
Safe and stable operation.
Claims (4)
1. a kind of axial flow blower stall proof bypass circuit flue structure, it is characterised in that including connecting in air-introduced machine outlet section cigarette
Bypass circuit flue (1) between road and air-introduced machine inducer flue, the vertical section of bypass circuit flue (1) are provided with electric adjustable
Section door (2) and temperature-detecting device (3), electric adjustable section door (2) are connected with controlling organization, are opened for bypass circuit flue (1)
When regulation the top of electric adjustable section door (2) is arranged on by the air circulation of bypass circuit flue (1), temperature-detecting device (3),
It is connected with controlling organization, the temperature internal for detecting bypass circuit flue (1).
2. a kind of axial flow blower stall proof bypass circuit flue structure according to claim 1, it is characterised in that bypass follows
Annular smoke flue (1) is circular bypass circuit flue, and electric adjustable section door (2) is circular motorized adjustment door.
3. a kind of axial flow blower stall proof bypass circuit flue structure according to claim 1, it is characterised in that bypass follows
The metal Three-D compensator (4) close to electric adjustable section door (2) is additionally provided with annular smoke flue (1).
4. a kind of axial flow blower stall proof bypass circuit flue structure according to claim 1, it is characterised in that bypass follows
The metal single-wave compensator (5) close to air-introduced machine inducer flue is additionally provided with annular smoke flue (1), for absorbing bypass circuit cigarette
The deflection in road (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720801471.1U CN206919049U (en) | 2017-07-04 | 2017-07-04 | A kind of axial flow blower stall proof bypass circuit flue structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720801471.1U CN206919049U (en) | 2017-07-04 | 2017-07-04 | A kind of axial flow blower stall proof bypass circuit flue structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206919049U true CN206919049U (en) | 2018-01-23 |
Family
ID=61334778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720801471.1U Active CN206919049U (en) | 2017-07-04 | 2017-07-04 | A kind of axial flow blower stall proof bypass circuit flue structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206919049U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153798A (en) * | 2021-05-13 | 2021-07-23 | 西安热工研究院有限公司 | System for solving stall and surge of axial flow type primary fan |
-
2017
- 2017-07-04 CN CN201720801471.1U patent/CN206919049U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153798A (en) * | 2021-05-13 | 2021-07-23 | 西安热工研究院有限公司 | System for solving stall and surge of axial flow type primary fan |
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