CN206016877U - A kind of turbine shaft seal heater condensate water level precise control device - Google Patents
A kind of turbine shaft seal heater condensate water level precise control device Download PDFInfo
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- CN206016877U CN206016877U CN201621076930.6U CN201621076930U CN206016877U CN 206016877 U CN206016877 U CN 206016877U CN 201621076930 U CN201621076930 U CN 201621076930U CN 206016877 U CN206016877 U CN 206016877U
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- water level
- control valve
- heater
- condenser
- pneumatic control
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Abstract
The utility model provides a kind of turbine shaft seal heater condensate water level precise control device, including electric water level gauge, control system, pneumatic control valve door, multilevel water seal and condenser；The electric water level gauge is used for the water level for measuring gland heater, and signal is delivered to control system, pneumatic control valve door is output control signals to by control system, the pneumatic control valve door is connected with gland heater and multilevel water seal respectively, and the multilevel water seal is connected with the condenser.The double requirements of energy-conservation and safe operation can be realized, turbine shaft seal heater condensate water level precise control is efficiently realized.Guarantee that gland heater is hydrophobic unobstructed to condenser, gland heater heat exchange property is good, can prevent gland heater water level from crossing the vacuum of low drain vacuum influence condenser and the economy of unit again.
Description
Technical field
The utility model is related to Mechanical course field, more particularly to a kind of turbine shaft seal heater water level precise control.
Background technology
In prior art, in power plant, the gland heater recovery turbine shaft leak sealing vapour of steam turbine comes heat-setting water, axle
Envelope vapour is cooled into water white-out and reclaims to condenser.The hydrophobic pipe by a Ф 57*3.5 of former gland heater is to multi-level water
Envelope, then the drainage spherical valve entrance condenser through a DN65.The aperture that drainage spherical valve can manually be adjusted in operation is adjusted
Section enters the hydrophobic amount of condenser, so as to adjust the water level of gland heater.As unit participates in peaking operation load variations greatly,
The axle envelope vapour and hydrophobic amount for entering gland heater changes greatly, it is impossible to accomplishes to adjust drainage spherical valve manually in real time, causes axle envelope to add
Hot device water-level fluctuation is big, have impact on the heat exchange property of gland heater；And gland heater water level too low when, multilevel water seal is normal
Often there is anhydrous operation operating mode, it is impossible to play water seal effect, make the gas in gland heater be directly entered condenser, affect machine
The vacuum of group and the economy of unit.
Through live test of many times, after multilevel water seal fills water, condenser vacuum rises about 1.5KPa.Carrying out, vacuum is tight
During tightness test, it is necessary to carry out water filling to multilevel water seal, and water injection rate is estimate, it is impossible to calculate whether multilevel water seal fills water
Or how long water is emptied to condenser in water seal.The anhydrous operation of multilevel water seal, not only have impact on vacuum tightness test
As a result, it is most important that the long-term vacuum for affecting condenser, there is more serious shadow to the economy and security of unit operation
Ring.
Gland heater water-level fluctuation is big, and it is domestic a lot of power plant to cause multilevel water seal anhydrous operation or axial sealing blower fan to be fetched water
The most common failure of appearance.Anhydrous operation is because that the suction of condenser vacuum is bigger than the effective depth of water seal, blots in water seal
Water, makes multilevel water seal play sealing function, and in gland heater, gas is directly entered condenser and causes unit vacuum decay,
Some power plant thus result in that chaser is non-to stop accident；Axial sealing blower fan is fetched water is that water seal effective depth is too high, have in multilevel water seal air,
The factor such as tube fluid resistance is excessive, makes gland heater blocked drain, gland heater full water cause blower fan to fetch water, and sternly
The factor of unit safety operation is endangered again.
In a word, existing gland heater draining system and water lev el control mode can not take into account the double of energy-conservation and safe operation
Important ask, in the urgent need to making improvements.
Utility model content
In order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide one kind can be while meet energy-conservation and safety
The double design of operation requires turbine shaft seal heater condensate water level precise control device.
The utility model provides a kind of turbine shaft seal heater condensate water level precise control device, including electronic water level
Meter, control system, pneumatic control valve door, multilevel water seal and condenser；The electric water level gauge is used for measuring gland heater
Water level, and signal is delivered to control system, pneumatic control valve door, the pneumatic control valve are output control signals to by control system
Door is connected with gland heater and multilevel water seal respectively, and the multilevel water seal is connected with the condenser.
Preferably, pneumatic control valve manually operated door in front of the door, institute are provided between the pneumatic control valve door and gland heater
State and between pneumatic control valve door and multilevel water seal, be provided with pneumatic control valve manually operated door behind the door, for there is event when pneumatic control valve
During barrier, energy shielding system carries out on-bne repair.
Preferably, also include the electric check valve for connecting gland heater and multilevel water seal.
Preferably, signalling channel connection is provided between the control system and the pneumatic control valve door.
Preferably, control system is DCS control systems.
Preferably, the pneumatic control valve door is high-precision pneumatic control valve.
Preferably, the condenser is provided with drainage spherical valve, and the multilevel water seal is connected with drainage spherical valve.With prior art
Compare, the utility model has the advantage of：
1st, the double requirements of energy-conservation and safe operation can be realized, turbine shaft seal heater condensate water level is efficiently realized
Precise control.Guarantee that gland heater is hydrophobic unobstructed to condenser, gland heater heat exchange property is good, can prevent axle envelope from adding again
Hot device water level crosses the vacuum of low drain vacuum influence condenser and the economy of unit.
2nd, device provided by the utility model can be put into for a long time, it is ensured that the safety fortune of gland heater and condenser
OK.
3rd, the system operation for being provided is safe and reliable, and unit thermodynamic system will not be impacted.Axle envelope drain water piping system
System is provided with bypass electric check valve door, when pneumatic control valve door failure cannot meet hydrophobic flow（Gland heater water level
Up to more than 450mm）, bypass electric check valve door automatically opens up, makes hydrophobic to drain into condenser through this valve.
4th, the system automation degree for being provided is high, easy to operate.The utility model adjusts valve using high-precision pneumatic
And electrically operated valve, the system of facilitating automatically engages operation, and gland heater water level signal delivers to the Distributed Control System of power plant
DCS, DCS provide adjustment signal to adjustment door is controlled, and can accurately adjust automatically the hydrophobic water level of gland heater.
5th, the hydrophobic water level accuracy-control system of the gland heater that provided is simple, installation workload and plant maintenance amount
Few.
6th, the method for being provided can produce good implementation result.Implemented using system schema provided by the utility model
Afterwards, the vacuum of condenser will be effectively improved, will reduce the coal consumption of unit, the safety and economic operation to unit will be significant.
Description of the drawings
Fig. 1 is the utility model turbine shaft seal heater condensate water level precise control device schematic diagram.
Specific embodiment
With reference to the accompanying drawings and detailed description the utility model is described in further detail.It should be appreciated that this
The described specific embodiment in place is only used for explaining utility model, is not used to limit utility model.
The utility model provides a kind of turbine shaft seal heater condensate water level precise control device, for heating to axle envelope
Device 1 carries out water level and is controlled, and that includes the electricity for being arranged on gland heater 1 water level for being used for measuring gland heater 1
Sub- water-level gauge 2, then electric water level gauge 2 signal is delivered to control system, it is preferable that control system be DCS control systems 3, DCS
Control system 3 outputs control signals to pneumatic control valve door 5 according to gland heater hydrophobic amount precise control control valve in real time
Aperture, it is ensured that gland heater water level is accurately controlled in the range of setting value, has both guaranteed gland heater 1 to condenser 9
Hydrophobic unobstructed, gland heater heat exchange property is good, can prevent gland heater water level from crossing low drain vacuum influence condenser 9 again
Vacuum and unit economy.
Its workflow is, when gland heater water level is not up to 350mm, 2 DCS signals of electric water level gauge are to pneumatic
Control valve 5, reduces the aperture of pneumatic control valve door 5,1 water level of gland heater is increased；When gland heater water level exceedes
During 350mm, the DCS signals of electric water level gauge 2 increase the aperture of pneumatic control valve door 5, make axle envelope to pneumatic control valve door 5
1 water level decreasing of heater, so that realize the automatic precise control of 1 water level of gland heater.
Pneumatic control valve door 5 is required using high-precision according to 1 hydrophobic property of gland heater and 9 systematic parameter of condenser
Pneumatic control valve door, with good control characteristic and linearly, it is ensured that the precise control of turbine shaft seal heater condensate water level
Require.
Wherein, pneumatic control valve manually operated door 4 in front of the door, the gas are provided between pneumatic control valve door 5 and gland heater 1
Pneumatic control valve manually operated door 6 behind the door are provided between dynamic control valve 5 and multilevel water seal 7.The drain water piping system of gland heater 1
Pneumatic control valve door 5 is provided with system main road, its work work journey is the hydrophobic through hand-operated valve before pneumatic control valve of gland heater 1
Manually-operated gate 6 after door 4 and pneumatic control valve 5 and pneumatic control valve, enters multilevel water seal 7, hydrophobic to condenser through axle envelope
Ball valve 8, enters condenser 9.
Bypass electric check valve door 10 is provided with described axle envelope drain water piping system bypass, and its workflow is, when
When 5 failure of pneumatic control valve door cannot meet hydrophobic flow（Gland heater water level is up to more than 450mm）, bypass electronic cut-off
Valve 10 is automatically opened up, and makes hydrophobic to drain into condenser 9 through bypassing electric check valve door 10.
The effect of manually operated door 6 is when 5, pneumatic control valve door to pneumatic control valve after manually operated door 4 and pneumatic control valve in front of the door
During raw failure, energy shielding system carries out on-bne repair, after the completion of maintenance, reopens front manually operated door and rear manually operated door, recovers
Pneumatic control valve door 5 puts into operation.
It is when 5 failure of pneumatic control valve door that the electric check valve of the connection gland heater 1 and multilevel water seal 7 is effect
When cannot meet hydrophobic flow, bypass electric check valve door 10 is automatically opened up, and makes hydrophobic to drain into condenser 9 through this valve, it is to avoid go out
Existing gland heater 1 cannot be hydrophobic and the problem that causes water level too high.
Signalling channel company is provided between control system and the pneumatic control valve door 5 and bypass electric check valve door 10
Connect, when 1 water level of gland heater changes, water level signal is by control system to pneumatic control valve door and electric check valve
It is adjusted and controls, makes water level precisely remain in the water level of setting（350mm）.
The control system is DCS control systems, and 1 water level signal of gland heater delivers to power plant by electric water level gauge 2
Distributed Control System DCS, DCS provide adjustment signal to adjustment electric water level gauge 2 is controlled, and can accurately adjust automatically gland heater
1 hydrophobic water level.
The pneumatic control valve door 5 is high-precision pneumatic control valve.When the signal of control system is received, Neng Goujing
Really open big or turn down valve, control hydrophobic flow, so that 1 water level of gland heater maintains setting value.
The condenser 9 is provided with drainage spherical valve 8, and the multilevel water seal 7 is connected with drainage spherical valve 8.Gland heater 1 is dredged
Water enters condenser 9 by after multilevel water seal 7, flowing through drainage spherical valve 8.Multilevel water seal 7 plays water seal effect in hydrophobic pipeline, puts down
Weighing apparatus condenser and the hydrophobic pressure of gland heater.
After being implemented using such scheme, axle is prevented and has added possibility through multi-level water leak sealing vacuum, reduced gland heater
Blocked drain and full water cause axial sealing blower fan to fetch water to emit the probability of vapour with low pressure packing, improve heat exchange property and make to dredge that axle adds
Water is more smooth.
As the axle position that adds water is accurately controlled in the higher efficiency range of 350mm, prevented axle add through multi-level water leak sealing vacuum can
Can, with the ruuning situation contrast greatly of primitive axis plus water-level fluctuation change, under equal conditions, condenser vacuum will averagely improve 1.0KPa
More than, average saving 2.5 grams/KW.h of coal consumption, unit are calculated by 4000 hours using hour, save 3000 tons of coal of mark year, are marked coal and are pressed
600 yuan per ton, year saves 1,800,000 yuan of expense, achieves good energy-saving effect.
It is expected after the completion of 4 Transformation of Unit annual total revenue in ten thousand yuan or so of 180 × 4=720, it can be seen that equipment is changing
It is considerable to make the later economic benefit that puts into operation.
After scheme is implemented, improve the vacuum of unit, improve heat exchange property that axle adds and make hydrophobic more smooth, to unit
Safety and economic operation significant.
Claims (7)
1. a kind of turbine shaft seal heater condensate water level precise control device, it is characterised in that including electric water level gauge, control
System, pneumatic control valve door, multilevel water seal and condenser；The electric water level gauge is used for the water level for measuring gland heater, and
Signal is delivered to control system, pneumatic control valve door, the pneumatic control valve door difference are output control signals to by control system
It is connected with gland heater and multilevel water seal, the multilevel water seal is connected with the condenser.
2. a kind of turbine shaft seal heater condensate water level precise control device according to claim 1, it is characterised in that：
Be provided with pneumatic control valve manually operated door in front of the door between the pneumatic control valve door and gland heater, the pneumatic control valve door with
Pneumatic control valve manually operated door behind the door is provided between multilevel water seal.
3. a kind of turbine shaft seal heater condensate water level precise control device according to claim 1, it is characterised in that：
Also include the electric check valve for connecting gland heater and multilevel water seal.
4. a kind of turbine shaft seal heater condensate water level precise control device according to claim 1, it is characterised in that：
Signalling channel connection is provided between the control system and the pneumatic control valve door.
5. a kind of turbine shaft seal heater condensate water level precise control device according to claim 1, it is characterised in that：
Control system is DCS control systems.
6. a kind of turbine shaft seal heater condensate water level precise control device according to claim 1, it is characterised in that：
The pneumatic control valve door is high-precision pneumatic control valve.
7. a kind of turbine shaft seal heater condensate water level precise control device according to claim 1, it is characterised in that：
The condenser is provided with drainage spherical valve, and the multilevel water seal is connected with drainage spherical valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621076930.6U CN206016877U (en) | 2016-09-23 | 2016-09-23 | A kind of turbine shaft seal heater condensate water level precise control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621076930.6U CN206016877U (en) | 2016-09-23 | 2016-09-23 | A kind of turbine shaft seal heater condensate water level precise control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206016877U true CN206016877U (en) | 2017-03-15 |
Family
ID=58261267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621076930.6U Active CN206016877U (en) | 2016-09-23 | 2016-09-23 | A kind of turbine shaft seal heater condensate water level precise control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206016877U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107036454A (en) * | 2017-04-28 | 2017-08-11 | 申能股份有限公司 | The vacuum regulator and its control method of turbine condenser |
| CN114382558A (en) * | 2021-12-24 | 2022-04-22 | 中国电建集团河南省电力勘测设计院有限公司 | Steam-leakage-dischargeable steam seal heater device and control method thereof |
-
2016
- 2016-09-23 CN CN201621076930.6U patent/CN206016877U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107036454A (en) * | 2017-04-28 | 2017-08-11 | 申能股份有限公司 | The vacuum regulator and its control method of turbine condenser |
| CN114382558A (en) * | 2021-12-24 | 2022-04-22 | 中国电建集团河南省电力勘测设计院有限公司 | Steam-leakage-dischargeable steam seal heater device and control method thereof |
| CN114382558B (en) * | 2021-12-24 | 2024-02-13 | 中国电建集团河南省电力勘测设计院有限公司 | Steam seal heater device capable of exhausting steam and control method thereof |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |