CN107524478A - For the low pressure (LP) cylinder cooling device of extraction condensing back pressure system and its application - Google Patents
For the low pressure (LP) cylinder cooling device of extraction condensing back pressure system and its application Download PDFInfo
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- CN107524478A CN107524478A CN201710585067.XA CN201710585067A CN107524478A CN 107524478 A CN107524478 A CN 107524478A CN 201710585067 A CN201710585067 A CN 201710585067A CN 107524478 A CN107524478 A CN 107524478A
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- 238000001816 cooling Methods 0.000 title claims abstract description 70
- 238000000605 extraction Methods 0.000 title claims abstract description 34
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 210000004907 gland Anatomy 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 54
- 238000000034 method Methods 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 230000008676 import Effects 0.000 claims description 8
- 238000010791 quenching Methods 0.000 claims description 7
- 238000013036 cure process Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 235000014171 carbonated beverage Nutrition 0.000 claims description 3
- 230000006870 function Effects 0.000 claims description 3
- 230000009711 regulatory function Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 2
- 230000009897 systematic effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 230000000171 quenching effect Effects 0.000 description 5
- 238000000576 coating method Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910001347 Stellite Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/12—Cooling
-
- 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
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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
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/003—Arrangements for testing or measuring
-
- 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
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
- F01K17/025—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic in combination with at least one gas turbine, e.g. a combustion gas turbine
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The present invention relates to a kind of low pressure (LP) cylinder cooling device for extraction condensing back pressure system and its application, including intermediate pressure cylinder gland steam exhauster, low pressure (LP) cylinder, condenser, condensate pump, cooling steam pipe, temperature reducing system and heating extraction steam pipe；Medium pressure cylinder gland steam exhauster is connected with heating extraction steam pipe, low pressure (LP) cylinder respectively, and the first valve, the second valve are respectively provided with pipeline；The cooling steam pipe is connected with low pressure (LP) cylinder, and the 3rd valve, temperature reducing system, block valve are disposed with cooling steam pipe to low pressure (LP) cylinder；Temperature humidity tester is provided with the temperature reducing system.The present invention is reasonable in design, it is simple in construction, dependable performance, effectively cooling steam can first be cooled down again according to the pressure and humidity of cooling steam, cooling steam after cooling down again, its temperature is lower, and humidity also complies with design requirement, low pressure (LP) cylinder can preferably be cooled down, steam turbine extraction condensing back pressure systematic difference scope is expanded, has filled up the blank of this technical field.
Description
Technical field
The invention belongs to cogeneration of heat and power technical field, and in particular to a kind of low pressure (LP) cylinder cooling device for extraction condensing back pressure system
And its application, it is particularly suitable for use in and carries out the thermal power plant of heat supply.
Background technology
At present, China's policy gradually payes attention to the popularization of new energy, reduces the ratio of fired power generating unit.For thermal power plant,
The exhaust steam of steam turbine directly discharges typically by air cooling or water-cooling pattern, and this has resulted in huge cold end loss.
Such as the capacity usage ratio of the subcritical pure condensate units of 300MW is about 38%, wherein cold end loss accounts for 45%, using extraction for heat supply
The capacity usage ratio of unit is promoted to 60% afterwards, but the condensation low temperature exhaust heat for still having 20% is discharged, this partial heat by
It is low in grade and be difficult to directly utilize.Simultaneously as power network is consumption new energy electric power, coal group of motors thermoelectricity flexibility is wanted
Continuous reinforcement is asked, coal group of motors need to realize Ultra-low load operation, could meet the peak regulation demand of power network, and this gives coal-fired thermal power unit
Bring great challenge.
At present, patent application " steam turbine extraction condensing back pressure system and its adjusting method (application number 2017101939383) ", without
More exchanging rotor, you can realize that low pressure (LP) cylinder does not put into operation, the technology both can farthest increase external heating load, again can be with
High benefit realizes that unit underload generates electricity.But if first being cooled down again to cooling steam, enter back into low pressure (LP) cylinder, then can be with
Preferably cooling low pressure (LP) cylinder.And in this respect on, can be realized there is presently no preferable technology and cooling steam is first carried out again
Cooling.
The content of the invention
Based on the technological gap of target this area, the invention discloses a kind of reasonable in design, dependable performance, it is advantageously implemented
The device and its application that extraction condensing back pressure system low-voltage cylinder more preferably cools down.
Technical scheme is used by the present invention solves the above problems：This is used for the low pressure (LP) cylinder cooling means of extraction condensing back pressure system
And device, it is characterised in that it includes：Intermediate pressure cylinder gland steam exhauster, low pressure (LP) cylinder, condenser, condensate pump, cooling steam pipe, desuperheat
System and heating extraction steam pipe；Medium pressure cylinder gland steam exhauster is connected with heating extraction steam pipe, low pressure (LP) cylinder respectively, and is filled respectively on pipeline
There are the first valve, the second valve；The cooling steam pipe is connected with low pressure (LP) cylinder, and is set successively on cooling steam pipe to low pressure (LP) cylinder
It is equipped with the 3rd valve, temperature reducing system, block valve；Temperature humidity tester is provided with the temperature reducing system.
Preferably, the first valve of the present invention, the second valve have regulatory function, the 3rd valve, which has, to be adjusted
Section and throttling function.
Preferably, the import of temperature reducing system of the present invention is provided with pressure gauge tester.
Preferably, described temperature reducing system includes temperature humidity tester, Desuperheating device, desuperheat water pipe, the first regulation
Valve, check-valves.The desuperheat mode of such a cooling steam, system is relatively easy, easily operated with performing.
Alternatively preferably, the temperature reducing system includes temperature humidity tester, vapor-water heat exchanger, the second regulating valve
Door, the 3rd control valve, the 4th control valve；The import of vapor-water heat exchanger and the outlet of condensate pump connect, and in entrance
3rd control valve is installed；The outlet of vapor-water heat exchanger is connected with oxygen-eliminating device, and the second control valve is provided with exit；
The water side of vapor-water heat exchanger is provided with feed water by-pass, and the 4th control valve is provided with bypass.Such a temperature reducing system is maximum
Advantage be that can recycle the heat of cooling steam, realize the cascade utilization of energy, improve efficiency of energy utilization.
Preferably, also including blade in the low pressure (LP) cylinder, cure process is carried out to the blade.It is of the present invention low
Increase by one layer of hardening coat on the blade surface of cylinder pressure, or quenching hardening is carried out to blade.The strong of blade can be increased after hardening
Degree, prevents blade from being produced damage by cavitation or water erosion.Two kinds of applicable occasions of hardening mode are different, increase coating work in addition
Skill flow is easily operated relative to quenching hardening, but the blade of not all unit all suitably increases coating.
Preferably, the method that a kind of low pressure (LP) cylinder for extraction condensing back pressure system of the present invention cools down, its cooling means
It is as follows：
First, cure process is carried out to the blade of low pressure (LP) cylinder, one layer of hardening coat can be increased on the surface of blade, or
Quenching hardening is carried out to blade, improves the intensity of blade；
Secondly, in heat supply period, according to the change of extraneous thermic load, the first valve, the aperture of the second valve are adjusted, so as to protect
The steam heat that card heating extraction steam pipe is confessed keeps balancing with extraneous thermic load；
When extraneous thermic load gradually increases, progressively open big first valve, turn down the second valve, until the first valve is complete
Open, the second valve is closed；
When turning down the second valve, the flow that intermediate pressure cylinder steam discharge enters low pressure (LP) cylinder is gradually reduced；
When the exhaust steam flow for entering low pressure (LP) cylinder is less than low pressure (LP) cylinder minimum critical throttle flow, the 3rd valve, block valve are opened,
Steam cooling system puts into operation；
Now, cooling steam is throttled by adjusting the 3rd valve according to the numerical value of pressure gauge tester so that
The pressure of cooling steam meets the process requirements of cooling low pressure (LP) cylinder, defeated after then being cooled by temperature reducing system to cooling steam
Low pressure (LP) cylinder is delivered to cool down it, it is specific as follows：
1) when from temperature reducing system A：
Temperature reducing system A includes temperature humidity tester, Desuperheating device, desuperheat water pipe, the first regulating valve, check-valves；
The first regulating valve, check-valves are opened, desuperheating water is dropped by desuperheat water pipe into Desuperheating device to cooling steam
Temperature；Now, the aperture of the first valve is adjusted according to the measured value of temperature humidity tester, so as to adjust subtracting into Desuperheating device
Warm water flow；
2) when from temperature reducing system B：
Temperature reducing system B includes temperature humidity tester, vapor-water heat exchanger, the second control valve, the 3rd control valve, the 4th
Control valve；The import of vapor-water heat exchanger and the outlet of condensate pump connect, and are provided with the 3rd control valve in entrance；Vapour
The outlet of water- to-water heat exchanger is connected with oxygen-eliminating device, and the second control valve is being provided with exit；The water side of vapor-water heat exchanger is set
Feed water by-pass is equipped with, and the 4th control valve is installed in bypass；
The second control valve, the 3rd control valve are opened, condensate enters vapor-water heat exchanger to cooling by condensate pump
Steam is cooled, and is absorbed the condensate after heat and is delivered to oxygen-eliminating device again；Now, according to the measured value of temperature humidity tester
The second control valve, the 3rd control valve, the aperture of the 4th control valve are adjusted, so as to adjust the condensation into vapor-water heat exchanger
Water-carrying capacity.
The present invention compared with prior art, has advantages below and effect：1) can be real there is presently no preferable technology
Now the cooling steam for entering low pressure (LP) cylinder is first cooled down again；2) reasonable in design, simple in construction, dependable performance of the invention, can be with
According to the pressure and humidity of cooling steam, effectively cooling steam is first cooled down again；3) cooling steam after cooling down again, its
Temperature is lower, and humidity also complies with design requirement, low pressure (LP) cylinder can preferably be cooled down, and expands " steam turbine extraction condensing back pressure
The application of system ".
Brief description of the drawings
In order to illustrate more clearly of the present invention, the required accompanying drawing used is simply situated between in being described below to embodiment
Continue.It should be evident that drawings in the following description are only the description to embodiments of the invention, for ordinary skill
For personnel, without having to pay creative labor, simple deformation or title can also be carried out according to technical scheme
Change, or customary means is taken, goal of the invention can also be realized.
Fig. 1 is a kind of for the low pressure (LP) cylinder cooling means of extraction condensing back pressure system and the structural representation of device in the embodiment of the present invention
Figure.
Fig. 2 is the structural representation of the temperature reducing system of the first cooling means in the embodiment of the present invention.
Fig. 3 is the structural representation of the temperature reducing system of second of cooling means in the embodiment of the present invention.
Embodiment
With reference to embodiment, the present invention is described in further detail, following examples be explanation of the invention and
The invention is not limited in following examples.
Embodiment 1.
Referring to Fig. 1, a kind of low pressure (LP) cylinder cooling means and device for extraction condensing back pressure system that the embodiment is related to, its feature
It is, it includes：Intermediate pressure cylinder gland steam exhauster 14, low pressure (LP) cylinder 11, condenser 12, condensate pump 13, cooling steam pipe 16, temperature reducing system
17 and heating extraction steam pipe 15；Medium pressure cylinder gland steam exhauster 14 is connected with heating extraction steam pipe 15, low pressure (LP) cylinder 11 respectively, and on pipeline
It is respectively provided with the first valve 21, the second valve 22；The cooling steam pipe 16 is connected with low pressure (LP) cylinder 11, and in cooling steam pipe 16
On be disposed with the 3rd valve 23, temperature reducing system 17, block valve 24；Temperature humidity test is provided with the temperature reducing system 17
Instrument 18.
In this embodiment, the first valve 21, the second valve 22 have regulatory function, and the 3rd valve 23 has regulation and section
Flow function.
In this embodiment, the import of temperature reducing system 17 is provided with pressure gauge tester 20.
In this embodiment, the blade 19 of low pressure (LP) cylinder 11 is needed by doing cure process, and blade 19 is protected, and is solved
Etching problem caused by carbonated drink erosion etc., method for curing are：1) one layer of hardening coat, Ke Yili are increased on the surface of blade 19
One layer of hardening coat, coating material are formed on the surface of blade 19 with means such as electrospark impregnation, thermal spraying or laser melting coatings
It is the Hardmetal materials such as stellite, the titanium alloy of high intensity；2) flame hardening, high-frequency quenching, laser can be used to quench
The methods of fiery, carries out quenching hardening to blade 19, obtains the martensitic structure and quench-hardened case of high rigidity.
In this embodiment, its cooling down operation process is as follows：
First, the hardening process in embodiment, cure process is carried out to the blade 19 of low pressure (LP) cylinder 11, improves leaf
The intensity of piece 19；The intensity of blade can be increased after hardening, prevent blade from being produced damage by cavitation or water erosion.
Secondly, in non-heating period, the second valve 22 is opened, closes the first valve 21, the 3rd valve 23, block valve 24, vapour
Wheel unit is in the operation of pure condensate operating mode；
In heat supply period, open and adjust the first valve 21, the aperture of the second valve 22, close the 3rd valve 23, block valve
24, Steam Turbine is in the operation of extraction for heat supply operating mode；
In heat supply period, the valve 23 of the first valve 21 the 3rd, block valve 24 are opened, closes the second valve 22, at Steam Turbine
Run in back pressure supplying thermal condition；
Now, intermediate pressure cylinder steam discharge is all confessed by heating extraction steam pipe 15；The aperture of the 3rd valve 23 is adjusted, passes through the 3rd
Valve 23 carries out reducing pressure by regulating flow and Flow-rate adjustment, the pressure that pressure gauge tester 20 is shown after cooling steam throttling to cooling steam
Value meets process requirements；Then be delivered to after being cooled by temperature reducing system 17 to cooling steam low pressure (LP) cylinder 11 it is carried out it is cold
But；Cooling means is as follows：
1) as shown in Fig. 2 when from temperature reducing system A171：
Temperature reducing system A171 includes temperature humidity tester 18, Desuperheating device 1711, desuperheat water pipe 1712, the first regulating valve
1713rd, check-valves 1714；
The first regulating valve 1713, check-valves 1714 are opened, desuperheating water enters Desuperheating device to cold by desuperheat water pipe 1712
But steam is cooled；Now, the aperture of the first valve 1713 is adjusted according to the measured value of temperature humidity tester 18, so as to adjust
Attemperation water flow of the section into Desuperheating device；The source of desuperheating water can be boiler replenishing water, condensate etc.；Check-valves 1714 is used for
Prevent the working medium in Desuperheating device from producing adverse current.
2) as shown in figure 3, when from temperature reducing system B172：
Temperature reducing system B172 includes temperature humidity tester 18, vapor-water heat exchanger 1721, the second control valve the 1722, the 3rd
Control valve 1723, the 4th control valve 1724；The import of vapor-water heat exchanger 1721 is connected with the outlet of condensate pump 13, and
Entrance is provided with the 3rd control valve 1723；The outlet of vapor-water heat exchanger 1721 is connected with oxygen-eliminating device, and is pacified in exit
Equipped with the second control valve 1722；The water side of vapor-water heat exchanger 1721 is provided with feed water by-pass, and the 4th is provided with bypass
Control valve 1724；
The second control valve 1722, the 3rd control valve 1723 are opened, condensate is changed by condensate pump 13 into carbonated drink
Hot device 1721 cools to cooling steam, absorbs the condensate after heat and is delivered to oxygen-eliminating device again；Now, according to temperature humidity
The measured value of tester 18 adjusts the second control valve 1722, the 3rd control valve 1723, the aperture of the 4th control valve 1724,
So as to adjust the condensing water flow into vapor-water heat exchanger 1721.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, without departing from the inventive concept of the premise, can also make some improvements and modifications, these improvements and modifications also should be regarded as
In protection scope of the present invention.Although the present invention is disclosed as above with embodiment, it is not limited to the protection of the present invention
Scope, any technical staff for being familiar with this technology, in the variation and retouching made without departing from the spirit and scope of the invention,
Protection scope of the present invention all should be belonged to.
Claims (9)
1. a kind of low pressure (LP) cylinder cooling device for extraction condensing back pressure system, it is characterised in that it includes：Intermediate pressure cylinder gland steam exhauster (14),
Low pressure (LP) cylinder (11), condenser (12), condensate pump (13), cooling steam pipe (16), temperature reducing system (17) and heating extraction steam pipe
(15)；Medium pressure cylinder gland steam exhauster (14) is connected with heating extraction steam pipe (15), low pressure (LP) cylinder (11) respectively, and filled respectively on pipeline
There are the first valve (21), the second valve (22)；The cooling steam pipe (16) is connected with low pressure (LP) cylinder (11), and in cooling steam pipe
(16) to being disposed with the 3rd valve (23), temperature reducing system (17), block valve (24) on low pressure (LP) cylinder (11)；The temperature reducing system
(17) temperature humidity tester (18) is provided with；Described the first valve (21), the second valve (22) have regulatory function；Institute
Stating the 3rd valve (23) has regulation and throttling function.
A kind of 2. low pressure (LP) cylinder cooling device for extraction condensing back pressure system as claimed in claim 1, it is characterised in that the desuperheat
The import of system (17) is provided with pressure gauge tester (20).
3. any one low pressure (LP) cylinder cooling device for being used for extraction condensing back pressure system as claimed in claim 1 or 2, it is characterised in that
Described temperature reducing system (17) includes temperature humidity tester (18), Desuperheating device (1711), desuperheat water pipe (1712), the first tune
Save valve (1713), check-valves (1714).
4. any one low pressure (LP) cylinder cooling device for being used for extraction condensing back pressure system as claimed in claim 1 or 2, it is characterised in that
The temperature reducing system (17) includes temperature humidity tester (18), vapor-water heat exchanger (1721), the second control valve (1722), the
Three control valves (1723), the 4th control valve (1724)；The import of vapor-water heat exchanger (1721) goes out with condensate pump (13)
Mouth connection, and the 3rd control valve (1723) is installed in entrance；The outlet of vapor-water heat exchanger (1721) is connected with oxygen-eliminating device,
And the second control valve (1722) is installed in exit；The water side of vapor-water heat exchanger (1721) is provided with feed water by-pass, and
4th control valve (1724) is installed in bypass.
5. any one low pressure (LP) cylinder cooling device for being used for extraction condensing back pressure system as claimed in claim 1 or 2, it is characterised in that
Also include blade (19) in the low pressure (LP) cylinder (11), cure process is carried out to the blade (19).
6. a kind of low pressure (LP) cylinder cooling device for extraction condensing back pressure system as claimed in claim 5, it is characterised in that described to institute
It is to increase by one layer of hardening coat on blade (19) surface to state blade and carry out cure process, or blade (19) quench firmly
Change.
7. a kind of low pressure (LP) cylinder cooling means for extraction condensing back pressure system, it is characterised in that use and be used for as claimed in claim 5
The low pressure (LP) cylinder cooling device of extraction condensing back pressure system, its cooling means are as follows：
According to the change of extraneous thermic load, the first valve of regulation (21), the aperture of the second valve (22), so as to ensure that heating is drawn gas
The steam heat that pipe (15) is confessed keeps balancing with extraneous thermic load；
When extraneous thermic load gradually increases, progressively open big first valve (21), turn down the second valve (22), until the first valve
(21) standard-sized sheet, the second valve (22) are closed；
When turning down the second valve (22), the flow that intermediate pressure cylinder steam discharge enters low pressure (LP) cylinder is gradually reduced；
When the exhaust steam flow for entering low pressure (LP) cylinder is less than low pressure (LP) cylinder minimum critical throttle flow, the 3rd valve (23), block valve are opened
(24), steam cooling system puts into operation；
Now, cooling steam is throttled by adjusting the 3rd valve (23) according to the numerical value of pressure gauge tester (20),
So that the pressure of cooling steam meets the process requirements of cooling low pressure (LP) cylinder, then cooling steam is dropped by temperature reducing system again
Low pressure (LP) cylinder is delivered to after temperature to cool down it.
8. a kind of low pressure (LP) cylinder cooling means for extraction condensing back pressure system as claimed in claim 7, it is characterised in that described subtracts
Warm system (17) includes temperature humidity tester (18), Desuperheating device (1711), desuperheat water pipe (1712), the first regulating valve
(1713), check-valves (1714)；
The first regulating valve (1713), check-valves (1714) are opened, desuperheating water enters Desuperheating device pair by desuperheat water pipe (1712)
Cooling steam is cooled；Now, the aperture of the first valve (1713) is adjusted according to the measured value of temperature humidity tester (18),
So as to adjust the attemperation water flow into Desuperheating device.
A kind of 9. low pressure (LP) cylinder cooling means for extraction condensing back pressure system as claimed in claim 7, it is characterised in that the desuperheat
System (17) includes temperature humidity tester (18), vapor-water heat exchanger (1721), the second control valve (1722), the 3rd regulating valve
Door (1723), the 4th control valve (1724)；The import of vapor-water heat exchanger (1721) is connected with the outlet of condensate pump (13), and
The 3rd control valve (1723) is installed in entrance；The outlet of vapor-water heat exchanger (1721) is connected with oxygen-eliminating device, and is being exported
Place is provided with the second control valve (1722)；The water side of vapor-water heat exchanger (1721) is provided with feed water by-pass, and pacifies in bypass
Equipped with the 4th control valve (1724)；
The second control valve (1722), the 3rd control valve (1723) are opened, condensate enters carbonated drink by condensate pump (13)
Heat exchanger (1721) cools to cooling steam, absorbs the condensate after heat and is delivered to oxygen-eliminating device again；Now, according to temperature
The measured value of humidity tester (18) adjusts the second control valve (1722), the 3rd control valve (1723), the 4th control valve
(1724) aperture, so as to adjust the condensing water flow into vapor-water heat exchanger (1721).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710585067.XA CN107524478B (en) | 2017-07-18 | 2017-07-18 | Low-pressure cylinder cooling device for extraction and condensation back system and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710585067.XA CN107524478B (en) | 2017-07-18 | 2017-07-18 | Low-pressure cylinder cooling device for extraction and condensation back system and application thereof |
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| Publication Number | Publication Date |
|---|---|
| CN107524478A true CN107524478A (en) | 2017-12-29 |
| CN107524478B CN107524478B (en) | 2024-05-28 |
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| CN201710585067.XA Active CN107524478B (en) | 2017-07-18 | 2017-07-18 | Low-pressure cylinder cooling device for extraction and condensation back system and application thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108343480A (en) * | 2018-03-01 | 2018-07-31 | 华电电力科学研究院有限公司 | A kind of solidifying pumping back of the body heating system and adjusting method based on two unit black soy sauce vapour |
| CN108506057A (en) * | 2018-03-01 | 2018-09-07 | 华电电力科学研究院有限公司 | A kind of co-generation unit and adjusting method for cutting off low pressure (LP) cylinder into vapour |
| CN108590783A (en) * | 2018-03-01 | 2018-09-28 | 华电电力科学研究院有限公司 | A kind of control method for the swollen difference of turbine low pressure cylinder |
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| CN117145589A (en) * | 2023-10-31 | 2023-12-01 | 华能济南黄台发电有限公司 | Zero-output bypass cooling steam adjusting device of low-pressure cylinder of steam turbine |
| CN117145589B (en) * | 2023-10-31 | 2024-01-19 | 华能济南黄台发电有限公司 | Zero-output bypass cooling steam adjusting device of low-pressure cylinder of steam turbine |
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