CN108167032A - A kind of NCB types heat supply steam turbine back pressure pattern activation system and method - Google Patents
A kind of NCB types heat supply steam turbine back pressure pattern activation system and method Download PDFInfo
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- CN108167032A CN108167032A CN201711431465.2A CN201711431465A CN108167032A CN 108167032 A CN108167032 A CN 108167032A CN 201711431465 A CN201711431465 A CN 201711431465A CN 108167032 A CN108167032 A CN 108167032A
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- cylinder
- pressure
- valve
- heat supply
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D19/00—Starting of machines or engines; Regulating, controlling, or safety means in connection therewith
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
Abstract
The present invention relates to a kind of NCB types heat supply steam turbine back pressure pattern activation system and method, which includes generator, high pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder, 3S clutches, emptier and heat exchangers for district heating；Intermediate pressure cylinder is connected with first exhaust pipeline, second exhaust pipeline and third gas exhaust piping, and the input terminal of first exhaust pipeline is equipped with the first valve, output terminal connection heat exchangers for district heating；The input terminal of second exhaust pipeline is equipped with the second valve, output terminal connection low pressure (LP) cylinder；The input terminal of third gas exhaust piping is equipped with third valve, output terminal connection emptier；Intermediate pressure cylinder is also associated with the intermediate pressure by-pass for boiler heating boosting steam to be discharged into heat exchangers for district heating, and intermediate pressure by-pass is equipped with the 4th valve.Present invention reduces working medium a large amount of in start-up course and thermal loss；The complex operations for cutting off low cylinder operation after unit starts with low pressure (LP) cylinder again are avoided, reduce operation operation element amount, while reduce operation operational risk；Shorten the unit starting time.
Description
Technical field
The present invention relates to thermal power generating technology fields more particularly to a kind of NCB types heat supply steam turbine back pressure pattern to start system
System and method.
Background technology
NCB type heat supply Turbo-generator Sets, shaft system arrangement are：Generator, high pressure cylinder, intermediate pressure cylinder, 3S clutches, low pressure
Cylinder.The type unit generates electricity in non-heating period for pure condensate, and just for end Heating Period for taking out solidifying heat supply, the point cold phase is used for pure back pressure heat supply
Operation.Wherein back pressure heat supply running pattern, due to there is no a cold source energy, the efficiency highest of unit generation heat supply, therefore be also
Optimum economical operation pattern.
When NCB Steam Turbines use pure back pressure pattern heat supply running, low pressure (LP) cylinder need to be cut off by 3S throw-out-of clutches, is only protected
Generator, the operation of high middle cylinder are held, while by intermediate pressure cylinder steam discharge direct heating net steam extraction, i.e., the middle pure back pressure heat supply running pattern of row.
There are many start-up modes according to bypath system configuration for NCB types unit.During heat supply during unit starting, if using
Band low pressure (LP) cylinder starts, and need to realize the economical operation mould of back pressure heat supply starting and low pressure (LP) cylinder operation being cut off after guipure certain load
Formula.In related low pressure (LP) cylinder start-up course, a large amount of cold source energies can be caused, while cause unit starting process time longer, it is unfavorable
In realizing unit back pressuce economic operation model as early as possible, operating cost is caused to increase.
In addition, the process for cutting off low pressure (LP) cylinder operation after grid-connected again is complicated for operation, also it is easy to cause shafting unstable.It is light then
It is the delay start time, heavy then cause shaft train instability and unit cancel closedown, that is, lead to heat-loss, also resulting in influences resident's heating
Livelihood issues.
Invention content
In order to solve the above technical problems, the object of the present invention is to provide a kind of startups of NCB types heat supply steam turbine back pressure pattern
System and method, function is disengaged using 3S clutch engagements, and heat exchangers for district heating is cooled down middle cylinder steam discharge low-temperature receiver in unit heat supply period,
It is directly realized by the back pressure pattern startup without low pressure (LP) cylinder.
The present invention provides a kind of NCB types heat supply steam turbine back pressure pattern activation system, including generator, high pressure cylinder, in
Cylinder pressure, low pressure (LP) cylinder, 3S clutches, emptier and heat exchangers for district heating；Generator is connect with high pressure cylinder, and high pressure cylinder connects with intermediate pressure cylinder
It connects, intermediate pressure cylinder is connect with 3S clutches, and 3S clutches are connect with low pressure (LP) cylinder；
Intermediate pressure cylinder is connected with first exhaust pipeline, second exhaust pipeline and third gas exhaust piping, first exhaust pipeline it is defeated
Enter end and be equipped with the first valve, output terminal connection heat exchangers for district heating；
The input terminal of second exhaust pipeline is equipped with the second valve, output terminal connection low pressure (LP) cylinder；
The input terminal of third gas exhaust piping is equipped with third valve, output terminal connection emptier；
Intermediate pressure cylinder is also associated with the intermediate pressure by-pass for boiler heating boosting steam to be discharged into heat exchangers for district heating, intermediate pressure by-pass
Equipped with the 4th valve；
When heat exchangers for district heating is run, for low pressure (LP) cylinder to be isolated into vapour, 3S clutches are used to disengage low pressure (LP) cylinder the second valve.
Further, emptier is substituted with condenser.
Back pressure pattern the present invention also provides above-mentioned NCB types heat supply steam turbine back pressure pattern activation system starts method,
Including：
Before heat supply period NCB type heat supply steam turbine unit starting red switch, by intermediate pressure by-pass and the 4th valve by boiler heating
Boosting steam is discharged into heat exchangers for district heating, to coordinate boiler startup；
When heat supply period NCB type heat supply steam turbine unit back pressuces pattern starts red switch, by 3S throw-out-of clutch low pressure (LP) cylinders, lead to
It crosses and closes the second valve, to separate low pressure (LP) cylinder into vapour, combined using high pressure cylinder, intermediate pressure cylinder into vapour red switch startup and raising speed, middle pressure
Cylinder steam discharge enters emptier；
After thermal power plant unit back pressure pattern starts grid-connected and on-load, intermediate pressure cylinder steam discharge gradually switches into heat supply network heating again
Device, unit realize back pressure pattern load carrying, complete boiler and rise parameter, unit red switch, raising speed, grid-connected and on-load back pressure
Pattern starts overall process.
According to the above aspect of the present invention, by NCB types heat supply steam turbine back pressure pattern activation system and method, start-up course is reduced
In a large amount of working medium and thermal loss, the cold source energy of back pressure pattern is 0%, that is, realizes the unit and start to load carrying
Without cold source energy pattern；The complex operations for cutting off low cylinder operation after unit starts with low pressure (LP) cylinder again are avoided, reduce operation
Operation element amount (about 30%), while reduce operation operational risk；Shorten the unit starting time (about 2 hours).
Above description is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be implemented in accordance with the contents of the specification, below with presently preferred embodiments of the present invention and after attached drawing is coordinated to be described in detail such as.
Description of the drawings
Fig. 1 is a kind of structure diagram of NCB types heat supply steam turbine back pressure pattern activation system of the present invention.
Figure label：
1- generators；2- high pressure cylinders；3- intermediate pressure cylinders；4-3S clutches；5- low pressure (LP) cylinders；6- emptier (or condensing
Device)；7- heat exchangers for district heatings；The first valves of 8-；The second valves of 9-；10- third valves；The 4th valves of 11-.
Specific embodiment
With reference to the accompanying drawings and examples, the specific embodiment of the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but be not limited to the scope of the present invention.
Join shown in Fig. 1, a kind of NCB types heat supply steam turbine back pressure pattern activation system of the present embodiment, including generator 1,
High pressure cylinder 2, intermediate pressure cylinder 3,3S clutches 4, low pressure (LP) cylinder 5, emptier 6 (or condenser), heat exchangers for district heating 7 and intermediate pressure cylinder 3
Connecting line and third valve 10 between emptier 6, connecting line and the second valve 9 between intermediate pressure cylinder 3 and low pressure (LP) cylinder 5,
Connecting line and the first valve 8, intermediate pressure by-pass and the 4th valve 11 between intermediate pressure cylinder 3 and heat exchangers for district heating 7.
Can emptier 6 be entered by connecting line and third valve 10 all the way in 3 steam discharge of intermediate pressure cylinder；3 steam discharge of intermediate pressure cylinder
In can pass through connecting line and the second valve 9 all the way and enter low pressure (LP) cylinder 5；In 3 steam discharge of intermediate pressure cylinder all the way can by connecting line and
First valve 8 enters heat exchangers for district heating 7.
Intermediate pressure cylinder 3 is also used to boiler heating boosting steam being discharged into the intermediate pressure by-pass of heat exchangers for district heating 7 all the way, by middle pressure
Road is equipped with the 4th valve 11.
When heat supply network puts into operation and heat exchangers for district heating 7 is run, low pressure (LP) cylinder can be isolated by the second valve 9 into vapour, 3S clutches 4
Low pressure (LP) cylinder is disengaged, carrys out red switch and starts High inter case to realize that unit back pressuce pattern starts and direct backpressure power generation and heat supply is run,
Start-up course cold source energy is reduced, while reduces the low cylinder handover operation after senior middle school's low pressure (LP) cylinder combined launch.
The back pressure pattern of the system starts method and includes the following steps：
1) before the unit starting red switch of heat supply period NCB types, for cooperation boiler startup, bypass conduit and valve 11 can be used, it will
Boiler heating boosting steam is discharged into heat exchangers for district heating 7.
2) when heat supply period unit back pressuce pattern starts red switch, low pressure (LP) cylinder 5 is disengaged by 3S clutches 4, closes isolation low pressure
Connecting line and the second valve 9 separate low pressure (LP) cylinder 5 into vapour between cylinder 5, are combined using high pressure cylinder 2, intermediate pressure cylinder 3 into vapour red switch and opened
Dynamic and raising speed, 3 steam discharge of intermediate pressure cylinder enter emptier 6.
3) startup of thermal power plant unit back pressure pattern is grid-connected and with (5%) after certain load, and 3 steam discharge of intermediate pressure cylinder is gradually switched into again
Enter heat exchangers for district heating 7, unit realizes back pressure pattern load carrying, complete boiler rise parameter, unit red switch, raising speed, it is grid-connected and
The back pressure pattern of on-load starts overall process.
Since NCB types thermal power plant unit is started in heat supply period using back pressure pattern, boiler rises parameter, unit red switch, raising speed, simultaneously
Net and on-load overall process low pressure (LP) cylinder be not into vapour, it can be achieved that being run without cold source energy.One is reduction of start-up course working medium and heat
Amount loss, until the cold source energy of back pressure pattern is 0%, that is, realizes the unit and starts to load carrying no cold source energy
Pattern, two are that of avoiding the complex operations for cutting off low cylinder operation after unit starts with low pressure (LP) cylinder again, reduce operation operation element
Amount about 30%, also reduces operation operational risk, third, shortening the unit starting time about 2 hours.
The above is only the preferred embodiment of the present invention, is not intended to restrict the invention, it is noted that for this skill
For the those of ordinary skill in art field, without departing from the technical principles of the invention, can also make it is several improvement and
Modification, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (3)
1. a kind of NCB types heat supply steam turbine back pressure pattern activation system, which is characterized in that including generator, high pressure cylinder, middle pressure
Cylinder, low pressure (LP) cylinder, 3S clutches, emptier and heat exchangers for district heating；The generator is connect with the high pressure cylinder, the high pressure cylinder
It is connect with medium pressure cylinder, medium pressure cylinder is connect with the 3S clutches, and the 3S clutches are connect with the low pressure (LP) cylinder；
Medium pressure cylinder is connected with first exhaust pipeline, second exhaust pipeline and third gas exhaust piping, the first exhaust pipeline
Input terminal be equipped with the first valve, output terminal connects the heat exchangers for district heating；
The input terminal of the second exhaust pipeline is equipped with the second valve, and output terminal connects the low pressure (LP) cylinder；
The input terminal of the third gas exhaust piping is equipped with third valve, and output terminal connects the emptier；
Medium pressure cylinder is also associated with the intermediate pressure by-pass for boiler heating boosting steam to be discharged into the heat exchangers for district heating, described
Intermediate pressure by-pass is equipped with the 4th valve；
When the heat exchangers for district heating is run, for low pressure (LP) cylinder to be isolated into vapour, the 3S clutches are used to take off second valve
Open the low pressure (LP) cylinder.
2. a kind of NCB types heat supply steam turbine back pressure pattern activation system according to claim 1, which is characterized in that described
Emptier is substituted with condenser.
3. a kind of back pressure pattern of NCB types heat supply steam turbine back pressure pattern activation system described in claim 1 starts method,
It is characterized in that, including：
Before heat supply period NCB type heat supply steam turbine unit starting red switch, by medium pressure bypass and the 4th valve by boiler heating
Boosting steam is discharged into the heat exchangers for district heating, to coordinate boiler startup；
When heat supply period NCB type heat supply steam turbine unit back pressuces pattern starts red switch, pass through low pressure described in the 3S throw-out-of clutches
Cylinder by closing second valve, to separate the low pressure (LP) cylinder into vapour, is combined into vapour using the high pressure cylinder, intermediate pressure cylinder and rushed
Turn to start and raising speed, intermediate pressure cylinder steam discharge enter the emptier；
After thermal power plant unit back pressure pattern starts grid-connected and on-load, intermediate pressure cylinder steam discharge gradually switches into heat exchangers for district heating, machine again
Group realizes back pressure pattern load carrying, completes boiler and rises parameter, unit red switch, raising speed, grid-connected and on-load back pressure pattern
Start overall process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711431465.2A CN108167032B (en) | 2017-12-26 | 2017-12-26 | NCB type heating turbine back pressure mode starting system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711431465.2A CN108167032B (en) | 2017-12-26 | 2017-12-26 | NCB type heating turbine back pressure mode starting system and method |
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| CN108167032A true CN108167032A (en) | 2018-06-15 |
| CN108167032B CN108167032B (en) | 2023-06-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110925038A (en) * | 2019-12-05 | 2020-03-27 | 华能应城热电有限责任公司 | Steam turbine generator unit and starting method thereof |
| CN114810250A (en) * | 2022-04-14 | 2022-07-29 | 重庆赛迪热工环保工程技术有限公司 | Power generation thermodynamic system for reducing heat loss of steam turbine exhaust |
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| US2902831A (en) * | 1958-08-22 | 1959-09-08 | Gen Electric | Governing system for reheat steam turbine powerplant |
| SU1092288A1 (en) * | 1983-02-07 | 1984-05-15 | Предприятие П/Я А-3513 | Extraction turbine low-pressure cylinder |
| CN103016083A (en) * | 2012-12-26 | 2013-04-03 | 北京国电蓝天节能科技开发有限公司 | Back pressure and straight condensing switching heat supply system |
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| CN106285796A (en) * | 2016-10-28 | 2017-01-04 | 山东电力建设第工程公司 | The auxiliary steam intermediate pressure cylinder start-up method of steam turbine |
| CN106894855A (en) * | 2017-04-01 | 2017-06-27 | 祝凤娟 | A kind of thermoelectricity decoupling transformation and operation method based on heat source side and heat supply network comprehensive adjustment |
| CN207892663U (en) * | 2017-12-26 | 2018-09-21 | 中国大唐集团科学技术研究院有限公司火力发电技术研究所 | A kind of NCB types heat supply steam turbine back pressure pattern activation system |
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2017
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2902831A (en) * | 1958-08-22 | 1959-09-08 | Gen Electric | Governing system for reheat steam turbine powerplant |
| SU1092288A1 (en) * | 1983-02-07 | 1984-05-15 | Предприятие П/Я А-3513 | Extraction turbine low-pressure cylinder |
| CN103016083A (en) * | 2012-12-26 | 2013-04-03 | 北京国电蓝天节能科技开发有限公司 | Back pressure and straight condensing switching heat supply system |
| CN104405459A (en) * | 2014-11-21 | 2015-03-11 | 华电国际电力股份有限公司技术服务中心 | Backpressure machine acting and heat supply device for steam exhaust heat supply network of intermediate pressure cylinder of steam turbine |
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| CN106894855A (en) * | 2017-04-01 | 2017-06-27 | 祝凤娟 | A kind of thermoelectricity decoupling transformation and operation method based on heat source side and heat supply network comprehensive adjustment |
| CN207892663U (en) * | 2017-12-26 | 2018-09-21 | 中国大唐集团科学技术研究院有限公司火力发电技术研究所 | A kind of NCB types heat supply steam turbine back pressure pattern activation system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110925038A (en) * | 2019-12-05 | 2020-03-27 | 华能应城热电有限责任公司 | Steam turbine generator unit and starting method thereof |
| CN114810250A (en) * | 2022-04-14 | 2022-07-29 | 重庆赛迪热工环保工程技术有限公司 | Power generation thermodynamic system for reducing heat loss of steam turbine exhaust |
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| Publication number | Publication date |
|---|---|
| CN108167032B (en) | 2023-06-27 |
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