CN208935641U - A kind of blower flue gas reverse irrigation pipeline configuration - Google Patents
A kind of blower flue gas reverse irrigation pipeline configuration Download PDFInfo
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- CN208935641U CN208935641U CN201821668597.7U CN201821668597U CN208935641U CN 208935641 U CN208935641 U CN 208935641U CN 201821668597 U CN201821668597 U CN 201821668597U CN 208935641 U CN208935641 U CN 208935641U
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- circular pipe
- flue gas
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- blower
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Abstract
The utility model discloses a kind of blower flue gas to flow backward pipeline configuration, including the circular pipe (1) being connected between side fan outlet segment pipe and other side fan inlet segment pipe, the horizontal segment of circular pipe (1) is provided with electric adjustable section door (2) and electric shutting-door (3) and temperature-detecting device, electric adjustable section door (2) is connected with control mechanism, the flue gas flow for passing through circular pipe (1) is adjusted when opening for circular pipe (1), temperature-detecting device is arranged in the top of electric adjustable section door (2), it is connected with control mechanism, for detecting the internal temperature of circular pipe (1), electric shutting-door (2) is used for when circular pipe (1) deactivates and the isolation of flue gas.The utility model implementation result is good, and flue gas flows backward after solving the problems, such as the single sided operation stoppage of air-introduced machine in parallel, improves the safety of unilateral blower stoppage in transit maintenance, ensure that the safe operation of unit.
Description
Technical field
The utility model relates to blower flue gas used in a kind of coal-fired plant flue gas system to flow backward pipeline configuration.
Background technique
Coal-fired plant flue gas system air-introducing machine, booster fan are commonly provided with two air-introduced machines after merging transformation, and two are drawn
Blower is run using juxtaposition.When separate unit air-introduced machine breaks down, to guarantee that unit is not shut down, a Fans are usually maintained
Operation, another Fans shutdown repair.But since usual air-introduced machine outlet pressure is high, nominal outlet pressure is reachable+
Between 2500Pa~+3500Pa, conventional blind formula baffle door can not play sealing effect, and flue gas will be from stoppage in transit fan outlet
Flow backward to inside.
Coal-fired plant flue gas temperature is equal between 110 DEG C -150 DEG C, and SO in flue gas2Content is high, service personnel directly into
Enter blower internal maintenance, there are high-temperature flue gas to burn, SO2The a series of security risks such as poisoning.And if flue gas reverse irrigation amount
Greatly, it will cause draught fan impeller reversing, driving motor damage also led to when serious.
Therefore, avoiding the reverse irrigation of air-introduced machine exiting flue gas is to guarantee that blower can be by the premise of working service.
Utility model content
The purpose of this utility model be under the premise of not being transformed to the equipment such as air-introduced machine ontology and outlet damper door,
A kind of blower flue gas reverse irrigation pipeline configuration is provided, circular pipe is set between heteropleural blower import and export, by crosswind of stopping transport
Machine outlet flows backward flue gas and is pumped to operation side fans entrance, so that stoppage in transit blower interior is had the condition of safety inspection, to avoid
Security risk caused by unilateral blower is stopped transport when overhauling.
In order to achieve the above objectives, the utility model adopts the following technical solution to realize:
A kind of blower flue gas flows backward pipeline configuration, including connection side fan outlet segment pipe and other side blower into
Circular pipe between mouth segment pipe, the first horizontal segment of circular pipe are provided with electric adjustable section door, electric shutting-door, the first temperature
Spend detection device and the first non-metal compensator；Electric adjustable section door is controlled using motorized adjustment mode, is enabled for circular pipe
When adjust through the flue gas flow of circular pipe；Electric shutting-door is controlled using motorized adjustment mode, is set on circular pipe
The downstream of electric adjustable section door flue gas flow direction, the isolation of pipeline and flue gas when being deactivated for circular pipe；First temperature-detecting device
The downstream of the flue gas flow direction of electric shutting-door inside circular pipe is set, for detecting inside circular pipe under electric shutting-door
The flue-gas temperature of trip；First non-metal compensator is set to the downstream of the first temperature-detecting device flue gas flow direction on circular pipe,
For absorbing the deflection of circular flue horizontal direction.
The utility model, which further improves, to be, the first vertical section of circular pipe is provided with the second nonmetallic compensation
Device, for absorbing the deflection of circular flue vertical direction.
The utility model, which further improves, to be, the second horizontal segment of circular pipe is provided with second temperature detection dress
It sets, for detecting the flue-gas temperature of electric adjustable section door upstream inside circular pipe.
The utility model, which further improves, to be, the second vertical section of circular pipe is provided with the nonmetallic compensation of third
Device, for absorbing the deflection of circular flue vertical direction.
The utility model has following beneficial technical effect:
Before blower flue gas flows backward pipeline modification, in 300MW operating condition, unilateral air-introduced machine needs to carry out due to hydraulic cylinder failure
Maintenance.Unit load is down to 150MW, and fault of stop air-introduced machine, since flue gas reverse irrigation amount is big, impeller occurs obvious after blower power-off
Phenomenon is reversed, to prevent that driving motor is caused to damage, it is necessary to manual method be taken to force to fix by impeller.Blower upper casing is opened
Afterwards, flow backward flue gas to enter in Ventilator Room, cause maintenance and care provider that can not carry out inspection operation close to blower.In view of personnel
Security risk, power plant repair failure blower after can only shutting down, and have seriously affected the generation load of unit.
After the utility model flows backward pipeline modification using flue gas, when the urgent stop jumping of servo valve failure occurs in unilateral blower
Afterwards, the electric shutting-door for opening circular pipe is adjusted into tunnel gas amount by electric adjustable section door, ensure that failure
Without that can maintain normal pressure under smoke condition inside air-introduced machine, service personnel has carried out the dimension of safety to failure blower
It repairs, avoids the improper stoppage in transit of unit resulting from, saved operating cost and effectively reduce the non-of thermal power plant and stopped rate.Cause
This, the implementation result of the utility model is good, and flue gas flows backward after solving the problems, such as the single sided operation stoppage of air-introduced machine in parallel, improves
The safety of unilateral blower stoppage in transit maintenance, ensure that the safe operation of unit.
Detailed description of the invention
Fig. 1, Fig. 2 are that the utility model blower flue gas flows backward circular pipe structural schematic diagram.
In figure: 1. circular pipes, 2. electric adjustable section doors, 3. electric shutting-doors, 41. first temperature-detecting devices, 42. second
Temperature-detecting device, 51. first non-metal compensators, 52. second non-metal compensators, 53. third non-metal compensators.
Specific embodiment
The utility model is made further instructions below in conjunction with drawings and examples.
As shown in Figure 1, blower flue gas provided by the utility model flows backward circular pipe structure, including circular pipe 1, from
Side air-introduced machine exports segment pipe and draws, and is connected to other side air-introduced machine import segment pipe, and the outer diameter of circular pipe is taken out according to design
The reverse irrigation exhaust gas volumn taken is chosen for 630mm, wall thickness 6mm；Electric adjustable section door 2, electric shutting-door are respectively set on circular pipe 1
3, the first temperature-detecting device 41, second temperature detection device 42, the first non-metal compensator 51, the second non-metal compensator
52, third non-metal compensator 53.In addition, circular flue 1 and auxiliary device thereon are arranged symmetrically about boiler center line.
Wherein, circular pipe 1 and its attached electric adjustable section door 2, electric shutting-door 3, the first temperature-detecting device 41,
Two temperature-detecting devices 42, the first non-metal compensator 51, the second non-metal compensator 52 and third non-metal compensator 53 can
(second segment horizontal pipe need to be staggered) can also be arranged symmetrically using about boiler center line using in a manner of individually arranging
Mode.
Embodiment
Certain domestic 300MW unit air-introduced machine is Axial Fan with Adjustable Vanes, fan design parameter are as follows: air quantity 295.0m3/
S, total pressure 9000Pa, Access-Point Density 0.733kg/m3.Because air-introduced machine, booster fan merge air-introduced machine exit design pressure after transformation
Power becomes from ± 300Pa, improves to 2500Pa~4000Pa (variation of random groups operating load).Unit underload unilateral side fan operation
Or when the stoppage in transit of side fan trouble, there are obvious flue gases to flow backward phenomenon, not only stoppage in transit draught fan impeller reversing phenomenon is obvious, and flue gas
It leaks in Ventilator Room, causes inspection and maintenance difficulty in Ventilator Room, seriously affect the safe operation of unit.
Flow backward problem for the flue gas of air-introduced machine, propose a kind of blower flue gas reverse irrigation pipeline configuration, pipeline is circle
Pipeline, outer diameter 630mm, with a thickness of 6mm.And two electric shutting-doors, two electric adjustable section doors, two are configured with according to Fig. 1
Temperature-detecting device and four nonmetal textile compensators.
Utility model implementation result: after flowing backward pipeline modification using flue gas, when the urgent stop jumping of unilateral blower failure
Afterwards, circular pipe shutoff door (3) are opened, is adjusted by electric adjustable section door (2) into tunnel gas amount, is not only can guarantee
There is no flue gas inside failure air-introduced machine, normal pressure can also be maintained, ensure that service personnel repairs failure fan safe,
The failure for avoiding unit is stopped transport, and has been saved operating cost, has been effectively reduced the non-of thermal power plant and stop rate.Therefore, the utility model
Implementation result it is good, solve the problems, such as that flue gas flows backward after the single sided operation stoppage of air-introduced machine in parallel, improve unilateral blower and stop transport
The safety of maintenance ensure that the safe operation of unit.
Claims (4)
1. a kind of blower flue gas flows backward pipeline configuration, which is characterized in that including connection in side fan outlet segment pipe and separately
Circular pipe (1) between the fan inlet segment pipe of side, the first horizontal segment of circular pipe (1) are provided with electric adjustable section door
(2), electric shutting-door (3), the first temperature-detecting device (41) and the first non-metal compensator (51)；Electric adjustable section door (2) is adopted
It is controlled with electronic regulative mode, the flue gas flow for passing through circular pipe (1) is adjusted when enabling for circular pipe (1)；Electronic pass
Disconnected door (3) are controlled using motorized adjustment mode, are set to the downstream of motorized adjustment door (2) flue gas flow direction on circular pipe (1), are used
The isolation of pipeline and flue gas when circular pipe (1) deactivates；First temperature-detecting device (41) setting is internal in circular pipe (1)
The downstream of the flue gas flow direction of electric shutting-door (3), for detecting the flue gas in internal electric shutting-door (3) downstream of circular pipe (1)
Temperature；First non-metal compensator (51) is set on circular pipe (1) under the first temperature-detecting device (41) flue gas flow direction
Trip, for absorbing the deflection of circular pipe (1) horizontal direction.
2. a kind of blower flue gas according to claim 1 flows backward pipeline configuration, which is characterized in that circular pipe (1)
First vertical section is provided with the second non-metal compensator (52), for absorbing the deflection of circular flue (1) vertical direction.
3. a kind of blower flue gas according to claim 1 flows backward pipeline configuration, which is characterized in that circular pipe (1)
Second horizontal segment is provided with second temperature detection device (42), for detecting internal electric adjustable section door (2) upstream of circular pipe (1)
Flue-gas temperature.
4. a kind of blower flue gas according to claim 1 flows backward pipeline configuration, which is characterized in that circular pipe (1)
Second vertical section is provided with third non-metal compensator (53), for absorbing the deflection of circular flue (1) vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821668597.7U CN208935641U (en) | 2018-10-15 | 2018-10-15 | A kind of blower flue gas reverse irrigation pipeline configuration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821668597.7U CN208935641U (en) | 2018-10-15 | 2018-10-15 | A kind of blower flue gas reverse irrigation pipeline configuration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208935641U true CN208935641U (en) | 2019-06-04 |
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ID=66724555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821668597.7U Active CN208935641U (en) | 2018-10-15 | 2018-10-15 | A kind of blower flue gas reverse irrigation pipeline configuration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208935641U (en) |
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2018
- 2018-10-15 CN CN201821668597.7U patent/CN208935641U/en active Active
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