CN207609452U - Steam Turbine and its low pressure cylinder spray system - Google Patents
Steam Turbine and its low pressure cylinder spray system Download PDFInfo
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- CN207609452U CN207609452U CN201721777296.3U CN201721777296U CN207609452U CN 207609452 U CN207609452 U CN 207609452U CN 201721777296 U CN201721777296 U CN 201721777296U CN 207609452 U CN207609452 U CN 207609452U
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Abstract
The utility model discloses a kind of Steam Turbine and its low pressure cylinder spray systems, the Steam Turbine includes the high pressure cylinder set gradually, intermediate pressure cylinder and low pressure (LP) cylinder, the steam of medium pressure cylinder is delivered to by mesolow cylinder communicating pipe in the low pressure (LP) cylinder, the low pressure cylinder spray system is arranged adjacent to the low pressure (LP) cylinder to be cooled down to the low pressure (LP) cylinder, the low pressure cylinder spray system includes water pipe, it is connected to the spray assembly of described water pipe one end, the control valve being located on the water pipe, and the detection control assembly being connected to the control valve, the control valve is configured to control its aperture after the detection control assembly detects the vapor (steam) temperature of low pressure (LP) cylinder.As a result, while the steam flowed through from bypass pipe, which enters, takes away heat caused by air blast in low pressure (LP) cylinder, unlatching cooling unit can reduce cylinder temperature and prevent that the danger such as swollen difference transfinites, unbalance vibration and sealing performance reduce occur because overtemperature expands.
Description
Technical field
The utility model is related to the low pressure cylinder spray system of thermal power generation field more particularly to a kind of Steam Turbine and have
Its Steam Turbine.
Background technology
For Steam Turbine in back pressure operating mode, the steam needs of intermediate pressure cylinder discharge will be transported to heating system, then at present
It is expelled in condenser.In the low pressure (LP) cylinder course of work, unlatching spray desuperheating system is needed to cool down low pressure (LP) cylinder.However,
The feedback of spray desuperheating system is slower in the prior art, such as when such as observing that temperature is higher, and operating personnel first increase certain
It is observed, then de-regulation, need repeatedly observation in this way and is adjusted after valve opening, feedback is slow, and safety coefficient is low.
Invention content
The purpose of this utility model is that in view of the above-mentioned problems, propose a kind of Steam Turbine low pressure cylinder spray system and
With its Steam Turbine.
According to a kind of low pressure cylinder spray system of Steam Turbine of the utility model first aspect embodiment, the steam turbine
Group includes high pressure cylinder, intermediate pressure cylinder and the low pressure (LP) cylinder set gradually, and the steam of medium pressure cylinder discharge passes through mesolow cylinder communicating pipe
It is delivered in the low pressure (LP) cylinder, the low pressure cylinder spray system is arranged adjacent to the low pressure (LP) cylinder to be cooled down to the low pressure (LP) cylinder, institute
State low pressure cylinder spray system include water pipe, the spray assembly for being connected to described water pipe one end, the regulating valve being located on the water pipe
Door and the detection control assembly being connected to the control valve, the control valve are configured to the detection control assembly
Its aperture is controlled after detecting the exhaust temperature of low pressure (LP) cylinder.
As a result, when the steam discharge flowed through from bypass pipe enter in low pressure (LP) cylinder heat caused by air blast is taken away it is same
When, open cooling unit can reduce cylinder temperature prevent from transfiniting because swollen difference occurs for overtemperature expansion, unbalance vibration and sealing performance
The danger such as reduction.
One embodiment according to the present utility model, the other end of the water pipe are connected to the condensed water of the Steam Turbine
System or external water source.
One embodiment according to the present utility model, the detection control assembly include being located on the low pressure (LP) cylinder and detecting
It the temperature sensor of exhaust temperature and receives temperature signal and controls the controller of the controlling opening of valve.
One embodiment according to the present utility model, the control valve are configured to detect the exhaust temperature more than 60
It is opened when spending and the aperture opened is 40%.
Further, the regulating valve is further configured to detect exhaust temperature aperture when between 60 to 80 DEG C linear
Become larger, and standard-sized sheet when 80 degree of exhaust temperature of detection or more.
Further, the regulating valve is further configured to close when detecting the exhaust temperature less than 60 degree.
As a result, by the way that control valve and detection control assembly is arranged, unit during Steam Turbine back pressure operation may be implemented
Itself rapid feedback adjust, compared to existing uncontrollable electrically operated gate, the low pressure cylinder spray system of the utility model it is anti-
It is fast to present speed, substantially increases the safety coefficient of low pressure (LP) cylinder.
One embodiment according to the present utility model, setting can be without the hermetically sealed control of aperture on the mesolow cylinder communicating pipe
Valve processed is equipped with pressure and temperature reducing and bypasses between medium pressure cylinder and the low pressure (LP) cylinder, the pressure and temperature reducing bypass and the mesolow
Cylinder communicating pipe is arranged in parallel.
Optionally, the pressure and temperature reducing bypass includes bypass pipe and is equipped with pressure reducing valve and attemperator successively on it.
According to a kind of Steam Turbine of the utility model second aspect embodiment, including according to the utility model first aspect
Low pressure cylinder spray system described in embodiment.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Description of the drawings
Attached drawing is used to provide a further understanding of the present invention, and a part for constitution instruction, with this practicality
Novel embodiment for explaining the utility model, does not constitute limitations of the present invention together.In the accompanying drawings：
Fig. 1 is the structural schematic diagram according to the Steam Turbine of the utility model one embodiment；
Fig. 2 is a specific embodiment of attemperator according to the present utility model；
Fig. 3 is another specific embodiment of attemperator according to the present utility model.
In conjunction with attached drawing, reference numeral is as follows in the utility model embodiment：
High pressure cylinder 1；Intermediate pressure cylinder 2；Low pressure (LP) cylinder 3；
Mesolow cylinder communicating pipe 41；It heats communicating pipe 42；Bypass pipe 43；
Control valve 5；Pressure and temperature reducing equipment 6；Pressure reducing valve 61；Attemperator 62；
Attemperator shell 621；Water spray unit 622；Condensate pipe 6221；Nozzle 6222；Desuperheat unit 623
Low pressure cylinder spray system 7；Water pipe 71；Spray assembly 72；Control valve 73；
Detect control assembly 8；Temperature sensor 81；Controller 82
Specific implementation mode
The preferred embodiment of the utility model is illustrated below in conjunction with attached drawing, it should be understood that described herein excellent
It selects embodiment to be only used for describing and explaining the present invention, is not used to limit the utility model.
It is used for Steam Turbine 100 as shown in Figure 1 according to a kind of low pressure cylinder spray system 7 of the utility model embodiment
In.
Steam Turbine 100 is first described first below comprising：High pressure cylinder 1, intermediate pressure cylinder 2, low pressure (LP) cylinder 3, the connection of mesolow cylinder
Pipe 41, heating communicating pipe 42 and bypass pipe 43.
High pressure cylinder 1 and intermediate pressure cylinder 2 close cylinder arrangement, and low pressure (LP) cylinder 3 is located at the downstream of intermediate pressure cylinder 2.Entire steamer device is whole as a result,
It is divided into two cylinders.Live steam enters the work done of high intermediate pressure cylinder part, is divided into two strands after being expanded to certain pressure, one extraction is until heat supply network
Heater heats, and another strand enters low pressure (LP) cylinder 3 and continue expansion working, is finally discharged into condenser (not shown).
Wherein, it is connected to mesolow cylinder communicating pipe 41 between intermediate pressure cylinder 2 and low pressure (LP) cylinder 3 with by high pressure cylinder 1 and intermediate pressure cylinder 2
The steam after acting expansion is divided to be delivered in low pressure (LP) cylinder 3.Heating is connect with by middle pressure communicating pipe 42 with mesolow cylinder communicating pipe 41
The steam extraction that cylinder 2 is discharged is to heating system, i.e. heat exchangers for district heating.
In steam turbine according to the present utility model, the heating steam extraction parameter of mesolow cylinder communicating pipe 41 can adjust, and work as vapour
When steam extraction amount is zero, i.e., all intermediate pressure cylinder steam discharges enter in low pressure (LP) cylinder turbine, to be equivalent to a condensing-type vapour
Turbine；If intermediate pressure cylinder steam discharge is completely drawn out supply user to heat, it is equivalent to a back pressure turbine.But practical fortune
In row, in order to cool down low pressure (LP) cylinder, take away due to heat caused by air blast friction loss, it is necessary to have a certain amount of steam stream too low
Cylinder pressure 3 enters condenser.
Present inventor is found that existing Steam Turbine, and there are great heating power to waste, on this basis, by existing skill
The machine with certain aperture (generally 8 degree) on mesolow cylinder communicating pipe 41 in art between intermediate pressure cylinder 2 and low pressure (LP) cylinder 3
Tool valve has made the control valve that can all seal into, is entered it is possible thereby to ensure not have intermediate pressure cylinder steam discharge to flow through from valve
In low pressure (LP) cylinder, realizing low pressure (LP) cylinder can not be into the requirement of vapour.Optionally, control valve 5 is electric liquid-controlled butterfly valve, in this way can be in
It is realized at low pressure (LP) cylinder communicating pipe 41 and reaches hermetically sealed function after valve is closed to zero-bit.
But the problem of cylinder gas leakage, can not avoid, micro gas leakage is poor in In-Cylinder Flow performance, in order to shorten its
Residence time in cylinder prevents the dangerous of air blast overtemperature from occurring, in the embodiments of the present invention, setting bypass pipe 43
As bypass line, wherein one end of bypass pipe 43 connects mesolow cylinder communicating pipe 41 and the other end is connected to low pressure (LP) cylinder 3
Between, bypass pipe 43 is equipped with pressure and temperature reducing equipment 6, when bypass pipe 43 is configured to 5 contract fully of control valve, makes a reservation for
Therefrom low pressure (LP) cylinder communicating pipe 41 enters by bypass pipe 43 in low pressure (LP) cylinder 3 steam of amount.
Appropriate and a small amount of cooling flow (about 0~15t/h) can enter low pressure (LP) cylinder 3 by bypass pipe 43 as a result, protect
Rational mobility in cylinder is demonstrate,proved, heat caused by air blast is smoothly taken away.
At the same time, the low pressure cylinder spray system 7 of the utility model is made to open to be cooled down to low pressure (LP) cylinder.Specifically, low
Cylinder pressure water injection system 7 is arranged adjacent to low pressure (LP) cylinder, and low pressure cylinder spray system 7 includes water pipe 71, is connected to the sprinkling of 71 one end of water pipe
Component 72, the control valve 73 being located on water pipe 71 and the detection control assembly 8 being connected to control valve 73, control valve
73 are configured to control its aperture after detection control assembly 8 detects the exhaust temperature of low pressure (LP) cylinder.
In low pressure (LP) cylinder heat caused by air blast is taken away when the steam discharge flowed through from bypass pipe 43 enters as a result,
Meanwhile open cooling unit can reduce cylinder temperature prevent from transfiniting because swollen difference occurs for overtemperature expansion, unbalance vibration and leakproofness
The danger such as energy reduction.
According to some embodiments of the present invention, the other end of water pipe 71 be connected to Steam Turbine 100 condensate system or
External water source.
As shown in Figure 1, in some embodiments, detection control assembly 8 includes being located on low pressure (LP) cylinder and detecting exhaust temperature
Temperature sensor 81 and receive temperature signal and control to adjust the controller 82 of 73 aperture of valve.Optionally, temperature sensing
Device can be multiple.
In a specific example, low pressure (LP) cylinder 3 is predeterminable there are three exhaust temperature value, is taken in three temperature values maximum anti-
It is fed at controller 82, controller is judged and controls to adjust the aperture of valve 73.For example, detection exhaust temperature is more than 60 degree
When, control valve 73 is opened and the aperture opened is 40%；Detect exhaust temperature control valve 73 when between 60 to 80 DEG C
Aperture linearly becomes larger, and standard-sized sheet when 80 degree of exhaust temperature of detection or more.Further, it is adjusted when detection exhaust temperature is less than 60 degree
Valve 73 is closed.As a result, by the way that control valve and detection control assembly is arranged, machine during Steam Turbine back pressure operation may be implemented
Itself rapid feedback of group is adjusted, compared to existing uncontrollable electrically operated gate, the low pressure cylinder spray system 7 of the utility model
Feedback speed is fast, substantially increases the safety coefficient of low pressure (LP) cylinder.
In some embodiments, pressure and temperature reducing equipment 6 includes：Pressure reducing valve 61 and attemperator 62, pressure reducing valve 61 are located at bypass
On communicating pipe 43, attemperator 62 is located at the downstream of pressure reducing valve 61.
As shown in Fig. 2, in the one of example of the utility model, attemperator 62 includes：Attemperator shell 621 and water spray
Unit 622.Limit desuperheat chamber 6210 in attemperator shell 621, the both ends of desuperheat chamber 6210 respectively with bypass pipe
43 connections allow steam to flow through, and water spray unit 622 is located in attemperator shell 621 to be carried out to the steam in desuperheat chamber 6210
Spray cooling.Optionally, water spray unit 622 includes condensate pipe 6221 and at least one nozzle 6222, and condensate pipe 6221 connects
It is connected to the condensate system of Steam Turbine 100.Preferably, nozzle is evenly arranged in desuperheat chamber 6210, can uniformly be subtracted in this way
Temperature.
As shown in figure 3, in another example of the utility model, attemperator 62 includes desuperheat unit 623, desuperheat unit
623 contact with bypass pipe 43 to carry out heat exchange to the steam in bypass pipe 43.Optionally, in desuperheat unit 623
It is passed through cooling water or cooling gas.In a preferable example, the cross section of desuperheat unit 623 is formed as annular, desuperheat unit
623 are set in the outside of bypass pipe 43.
Finally it should be noted that：The above descriptions are merely preferred embodiments of the present invention, is not limited to this
Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art
For, it still can be with technical scheme described in the above embodiments is modified, or to which part technical characteristic
Carry out equivalent replacement.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on,
It should be included within the scope of protection of this utility model.
Claims (9)
1. a kind of low pressure cylinder spray system of Steam Turbine, which is characterized in that the Steam Turbine includes the high pressure set gradually
The steam of cylinder, intermediate pressure cylinder and low pressure (LP) cylinder, the discharge of medium pressure cylinder is delivered to by mesolow cylinder communicating pipe in the low pressure (LP) cylinder, institute
It states low pressure cylinder spray system adjacent to the low pressure (LP) cylinder to be arranged to cool down the low pressure (LP) cylinder, the low pressure cylinder spray system includes water
Manage, the spray assembly for being connected to described water pipe one end, the control valve being located on the water pipe and with the control valve connect
Logical detection control assembly, after the control valve is configured to the exhaust temperature that the detection control assembly detects low pressure (LP) cylinder
Control its aperture.
2. the low pressure cylinder spray system of Steam Turbine according to claim 1, which is characterized in that the other end of the water pipe
It is connected to the condensate system or external water source of the Steam Turbine.
3. the low pressure cylinder spray system of Steam Turbine according to claim 1, which is characterized in that the detection control assembly
Including being located on the low pressure (LP) cylinder and detecting the temperature sensor of exhaust temperature and receive temperature signal and control the adjusting
The controller of valve opening.
4. the low pressure cylinder spray system of Steam Turbine according to claim 3, which is characterized in that the control valve is by structure
It is opened when causing to detect the exhaust temperature more than 60 degree and the aperture opened is 40%.
5. the low pressure cylinder spray system of Steam Turbine according to claim 4, which is characterized in that the regulating valve is also by structure
It is full when causing to detect exhaust temperature aperture when between 60 to 80 DEG C and linearly become larger, and detect 80 degree of exhaust temperature or more
It opens.
6. the low pressure cylinder spray system of Steam Turbine according to claim 5, which is characterized in that the regulating valve is also by structure
It causes to close when detecting the exhaust temperature less than 60 degree.
7. the low pressure cylinder spray system of Steam Turbine according to claim 1, which is characterized in that the mesolow cylinder connection
Setting can be equipped with pressure and temperature reducing without the hermetically sealed control valve of aperture, between medium pressure cylinder and the low pressure (LP) cylinder and bypass on pipe, institute
Pressure and temperature reducing bypass is stated to be arranged in parallel with the mesolow cylinder communicating pipe.
8. the low pressure cylinder spray system of Steam Turbine according to claim 7, which is characterized in that the pressure and temperature reducing bypass
Including bypass pipe and on it successively equipped with pressure reducing valve and attemperator.
9. a kind of Steam Turbine, which is characterized in that include the low pressure cylinder spray system according to any one of claim 1-8
System.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721777296.3U CN207609452U (en) | 2017-12-19 | 2017-12-19 | Steam Turbine and its low pressure cylinder spray system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721777296.3U CN207609452U (en) | 2017-12-19 | 2017-12-19 | Steam Turbine and its low pressure cylinder spray system |
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| Publication Number | Publication Date |
|---|---|
| CN207609452U true CN207609452U (en) | 2018-07-13 |
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ID=62799115
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721777296.3U Active CN207609452U (en) | 2017-12-19 | 2017-12-19 | Steam Turbine and its low pressure cylinder spray system |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109736904A (en) * | 2019-03-08 | 2019-05-10 | 张黎明 | It is a kind of to eliminate low pressure (LP) cylinder swollen poor, deformation temperature control system and method |
| CN114087037A (en) * | 2021-10-20 | 2022-02-25 | 中广核核电运营有限公司 | State detection method and system for low-pressure cylinder spraying device of steam turbine |
-
2017
- 2017-12-19 CN CN201721777296.3U patent/CN207609452U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109736904A (en) * | 2019-03-08 | 2019-05-10 | 张黎明 | It is a kind of to eliminate low pressure (LP) cylinder swollen poor, deformation temperature control system and method |
| CN109736904B (en) * | 2019-03-08 | 2024-02-27 | 张黎明 | Temperature control system and method for eliminating expansion difference and deformation of low-pressure cylinder |
| CN114087037A (en) * | 2021-10-20 | 2022-02-25 | 中广核核电运营有限公司 | State detection method and system for low-pressure cylinder spraying device of steam turbine |
| CN114087037B (en) * | 2021-10-20 | 2023-06-02 | 中广核核电运营有限公司 | State detection method and system for low-pressure cylinder spray device of steam turbine |
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