CN108301882A - A kind of generating set three-level series-parallel connection bypath system and its adjusting method - Google Patents
A kind of generating set three-level series-parallel connection bypath system and its adjusting method Download PDFInfo
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- CN108301882A CN108301882A CN201810201946.2A CN201810201946A CN108301882A CN 108301882 A CN108301882 A CN 108301882A CN 201810201946 A CN201810201946 A CN 201810201946A CN 108301882 A CN108301882 A CN 108301882A
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- 238000011161 development Methods 0.000 claims description 7
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- 238000000926 separation method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 230000003628 erosive effect Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
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- 238000002955 isolation Methods 0.000 description 4
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
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- 238000005299 abrasion Methods 0.000 description 2
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- 238000005265 energy consumption Methods 0.000 description 1
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- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009711 regulatory function Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
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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
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
- F01K7/18—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type the turbine being of multiple-inlet-pressure type
- F01K7/20—Control means specially adapted therefor
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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
- 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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/32—Collecting of condensation water; Drainage ; Removing solid particles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Control Of Turbines (AREA)
Abstract
The present invention discloses a kind of generating set three-level series-parallel connection bypath system and its adjusting method, including hp by-pass system, low-pressure bypass system and low low-pressure bypass system；Hp by-pass system includes high pressure turbine by filter, high pressure bypass valve and high pressure turbine by isolating valve；Low-pressure bypass system includes the low voltage bypass filter, low voltage bypass valve and low voltage bypass isolating valve being connected in turn between reheated steam hot arc pipeline and condenser；Low low-pressure bypass system includes low pressure (LP) cylinder isolating valve and middle pressure gas low voltage bypass communicating valve；On the gas-guide tube that low pressure (LP) cylinder isolating valve is arranged between intermediate pressure cylinder and low pressure (LP) cylinder；Middle pressure gas low voltage bypass communicating valve inlet duct is arranged on intermediate pressure cylinder discharge duct, and outlet conduit is arranged on the pipeline between low voltage bypass valve and low voltage bypass isolating valve；Hp by-pass system is connected with low-pressure bypass system by hp and lp bypass communicating valve, and the pipeline between low voltage bypass valve and isolating valve is connected for heat regulating valve with heat exchangers for district heating through low voltage bypass.
Description
Technical field
The invention belongs to steam turbine generation heat supply process field more particularly to a kind of generating set three-level series-parallel connection bypass systems
System and its adjusting method.
Background technology
The adjustment of large capacity thermal power generation unit boiler working condition in start-up course, de-activation procedure and steam turbine failure
Cheng Zhong, operating condition must have good coordination between boiler and steam turbine.The bypath system of generating set is steam resuperheat
The important composition system of monoblock therrmodynamic system is the steam channel system arranged side by side with steam-turbine channel, by bypass valve,
Bypass duct, heating coil facility and corresponding control device and necessary acoustic isolation facility composition.The initial steam come from boiler bypasses
Steam turbine high-pressure cylinder, referred to as high pressure turbine by；Steam after reheating around in steam turbine, low pressure (LP) cylinder, referred to as low voltage bypass；Newly
Steam directly arranges people's condenser around entire steam turbine, and referred to as complete machine bypasses, also known as big bypass.Again with protection boiler
Hot device, the effect improve entry condition, start quickly speed, extend unit durability, recycling working medium and heat.It is generally divided into two-stage
The big bypath system of inline bypass system, level-one, three-level bypath system, two-stage parallel connection bypath system and triple-use valve bypath system.
Two-stage series connection bypath system is using relatively broad, but peak modulation capacity is limited；The big bypath system of level-one cannot be adjusted
Reheater temperature, is not suitable for regulating units；Three-level bypath system is multiple functional, but system is complex, and equipment appurtenance is more, throws
Money is big, difficult arrangement, and operation is inconvenient, seldom uses；Two-stage parallel connection bypath system uses less；Triple-use valve system bypass capacity
Greatly, have the function of regulatory function, cutoff function and safety valve.
Great-leap-forward development is realized recently as the rapid growth of wind-powered electricity generation scale and photovoltaic generation, and supply of electric power is by totally putting down
The tight slightly state in weighing apparatus, part gradually turns to relative loose and part is superfluous.While non-fossil power supply fast development, some areas
Wind is abandoned, light is abandoned and abandons water problems protrusion, three northern areas of China wind electricity digestion is difficult, and it is serious that Yunnan and two province of Sichuan abandon water.Some areas
Peak load regulation network ability wretched insufficiency, especially north of china in winter Heating Period peak regulation are difficult, have been further exacerbated by non-fossil energy consumption lance
Shield.Fired power generating unit depth peak regulation is to solve above-mentioned contradictory effective way：Using the bypath system of existing unit, by transformation and
The method of operation of bypath system is adjusted, realizes fired power generating unit depth peak regulation.
Moreover, since generating set superheater reheater longtime running unavoidably generates and oxide skin frequent occurrence
It falls off, the oxide skin of steam high speed flowing not only can cause to damage to unit, but also have significantly to system bypass system valve
Solid particle erosion effect, lead to valve bite and interior leakage；By being transformed and adjusting the method for operation of bypath system, reaches and disappear
Except solid particle erosion problem.
Invention content
For problems of the prior art, a kind of generating set three-level series-parallel connection bypath system of present invention offer and its tune
Section method has the Heating Adjustment flexibility for improving existing fired power generating unit and peak regulation range, prevents the effect of solid particle erosion.
The present invention is to be achieved through the following technical solutions：
A kind of generating set three-level series-parallel connection bypath system, including by hp by-pass system, low-pressure bypass system and low pressure
Road system；
The hp by-pass system includes the height being connected in turn between main steam line and reheated steam cold segment pipe
Press bypass strainer, high pressure bypass valve and high pressure turbine by isolating valve；
The low-pressure bypass system includes by the low pressure being connected in turn between reheated steam hot arc pipeline and condenser
Pipe filter, low voltage bypass valve and low voltage bypass isolating valve；
The low low-pressure bypass system includes low pressure (LP) cylinder isolating valve and middle pressure gas low voltage bypass communicating valve；Low pressure (LP) cylinder every
On the gas-guide tube being arranged between intermediate pressure cylinder and low pressure (LP) cylinder from valve；Middle pressure gas low voltage bypass communicating valve inlet duct is arranged in
On cylinder pressure discharge duct, outlet conduit is arranged on the pipeline between low voltage bypass valve and low voltage bypass isolating valve；
The hp by-pass system is connected with low-pressure bypass system by hp and lp bypass communicating valve, low voltage bypass valve
Pipeline between the low voltage bypass isolating valve is connected for heat regulating valve with heat exchangers for district heating through low voltage bypass.
Preferably, the high pressure turbine by filter inlet is connect with main steam line, high pressure turbine by filter outlet with
High pressure turbine by valve inlet connects.
Preferably, the low voltage bypass filter inlet is connect with reheated steam hot arc pipeline, low voltage bypass filter
Outlet is connect with low voltage bypass valve inlet.
Preferably, hp and lp bypass connection valve inlet is arranged between high pressure bypass valve and high pressure turbine by isolating valve
On pipeline, export on the pipeline being arranged between low voltage bypass valve and low voltage bypass isolating valve.
Preferably, high pressure turbine by filter and low voltage bypass filter include separator, setting in separator side or
The inlet tube of center of top, is arranged the outlet in separator center of top or side, and setting is in separator interior by inlet tube
Access and outlet access separate strainer；Inlet tube is filter inlet, and outlet is filter outlet.
Further, the cylindrical setting of separator, bottom are provided with cone bucket, the cylindrical top for being fixed on separator of strainer
Portion；
Inlet tube is arranged at separator side, is provided with backplate outside the side of strainer face, filter screen bottom closing and
It is in gap setting with separator bottom cone bucket；
Inlet tube is arranged in separator center of top, and filter screen bottom is open and connect setting with separator bottom cone bucket.
Further, the primary door of oxidized skin discharge is connected with oxide skin discharge secondary door in cylinder successively for the bottom of separator
The oxide skin collector of shape.
Further, the output end of the hydrophobic filter being arranged inside oxide skin collector, hydrophobic filter connects hydrophobic expansion
Container；The steam (vapor) outlet of hydrophobic development unit is connected on the pipeline between low voltage bypass valve and low voltage bypass isolating valve, it is hydrophobic go out
Mouth is connected to condenser.
A kind of generating set three-level series-parallel connection bypath system adjusting method, including：
When generating set starts, hp and lp bypass communicating valve, middle pressure gas low voltage bypass communicating valve and low voltage bypass are closed
For heat regulating valve；Open high pressure turbine by filter, high pressure bypass valve, high pressure turbine by isolating valve, low voltage bypass filter, by low pressure
Road valve and low voltage bypass isolating valve；Normally start according to two-stage tandem bypath system, grid-connected and on-load；
When heat supply depth peak regulation, hp and lp bypass communicating valve, middle pressure gas low voltage bypass communicating valve and low voltage bypass are opened
For heat regulating valve；Close high pressure turbine by isolating valve and low voltage bypass isolating valve；High pressure bypass valve is adjusted to be connected to hp and lp bypass
Valve reduces high pressure cylinder air inflow, reduces high pressure cylinder and contributes；Low voltage bypass valve opening is adjusted simultaneously, is reduced intermediate pressure cylinder air inflow, is subtracted
Small intermediate pressure cylinder is contributed；Low pressure (LP) cylinder isolation valve opening is adjusted simultaneously, low pressure (LP) cylinder minimum air inflow is maintained, in adjusting by pressure gas low pressure
Road communicating valve and low voltage bypass increase heating demand for heat regulating valve.
Preferably, including：
When oxide skin detaches in superheater in operation, high pressure turbine by isolating valve, low voltage bypass valve, middle pressure gas low pressure are closed
Bypass valve and low voltage bypass are for heat regulating valve；It opens high pressure turbine by filter, adjust high pressure bypass valve, low voltage bypass isolation
Valve and hp and lp bypass communicating valve；Oxide skin in superheater is set to be carried to the separation of high pressure bypass strainer through superheated steam；
When oxide skin detaches in reheater in operation, closes high pressure bypass valve, high pressure turbine by isolating valve, hp and lp bypass and connect
Port valve, middle pressure gas low voltage bypass communicating valve and low voltage bypass are for heat regulating valve；Open low voltage bypass filter and low voltage bypass
Isolating valve adjusts low voltage bypass valve opening, and the reheated steam of oxide skin in reheater is made to carry to the separation of low voltage bypass filter.
Compared with prior art, the present invention has technique effect beneficial below：
System of the present invention is set gradually by what three-level bypassed, is able to carry out high, neutralization low pressure (LP) cylinder other
Road and protection improve Heating Adjustment flexibility and peak regulation range, the climbing capacity and start and stop speed of existing fired power generating unit.Pass through
Filter on the high pressure turbine by and low voltage bypass of setting eliminates the solid particle erosion effect of generating set bypass valve,
Reduce bypass valve abrasion and interior leakage, there is more significant safety benefit and economic benefit.
Further, by the setting of filter, the abrasion to high side valve and interior leakage are eliminated, and eliminate in steam
Oxide skin has significant safety benefit to the solid particle erosion of main inlet throttle-stop valve, high pitch and steam turbine.
Method of the present invention, by the way that high pressure turbine by, low voltage bypass and low low voltage bypass is arranged；And it is respectively communicated with high pressure
Bypass and low voltage bypass, low voltage bypass and low low voltage bypass；It is adjustment high pressure turbine by, low voltage bypass, low in unit depth peak regulation
Low pressure bypass valve arrangement and hp and lp bypass communicating valve, middle pressure gas low voltage bypass are connected to valve opening, and depth reduces steam turbine and steams
Vapour amount reduces generation load, improves heat capacity.
Further, by adding filter, the method for operation of flexible modulation bypath system, divides before porthole in operation
From the oxide skin in steam, porthole strainer can be cancelled, while filtered steam being returned in heating power circuit, not increase
The flow path resistance of system, and steam pressure loss is reduced, there is more significant economic benefit.
Description of the drawings
Fig. 1 is a kind of generating set depth peak regulation three-level series-parallel connection bypath system schematic diagram of the present invention.
Fig. 2 is a kind of structural schematic diagram of separator of the present invention.
Fig. 3 is the structural schematic diagram of another separator of the present invention.
In figure：1- high pressure turbine bies filter, 2- high pressure bypass valves, 3- high pressure turbine bies isolating valve, 4- low voltage bypasses filter,
Pressure gas low pressure in 5- low voltage bypasses valve, 6- low voltage bypasses isolating valve, 7- hp and lp bypasses communicating valve, 8 low pressure (LP) cylinder isolating valves, 9-
Bypass valve, 10- low voltage bypasses are sent out for heat regulating valve, 11- boilers, 12- high pressure cylinders, 13- intermediate pressure cylinders, 14- low pressure (LP) cylinders, 15-
Motor, 16- condensers, 17- feed pumps, 18- superheaters, 19- reheaters, 20- separators, 21- inlet tubes, 22- outlets,
23- strainers, 24- oxide skins discharge primary door, 25- oxide skins discharge secondary door, 26- oxide skins collector, 27- hydrophobic filters
Device, 28- backplates, 29- hydrophobic development units.
Specific implementation mode
With reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
A kind of generating set depth peak regulation three-level series-parallel connection bypath system of the present invention, including it is hp by-pass system, low
Bypath system and low low-pressure bypass system are pressed, as shown in Figure 1, it specifically includes high pressure turbine by filter 1, high pressure bypass valve 2, height
Press bypass isolation valves 3, low voltage bypass filter 4, low voltage bypass valve 5, low voltage bypass isolating valve 6, hp and lp bypass communicating valve 7,
Low pressure (LP) cylinder isolating valve 8, middle pressure gas low voltage bypass communicating valve 9, low voltage bypass for heat regulating valve 10, boiler 11, high pressure cylinder 12, in
Cylinder pressure 13, low pressure (LP) cylinder 14, generator 15, condenser 16, feed pump 17, superheater 18 and reheater 19；Wherein high pressure turbine by system
System includes high pressure turbine by filter 1, high pressure bypass valve 2 and high pressure turbine by isolating valve 3, and low-pressure bypass system includes low voltage bypass mistake
Filter 4, low voltage bypass valve 5 and low voltage bypass isolating valve 6, low low-pressure bypass system include low pressure (LP) cylinder isolating valve 8 and middle pressure gas
Low voltage bypass communicating valve 9；Hp by-pass system is connected with low-pressure bypass system by hp and lp bypass communicating valve 7, by low pressure
Road system is connected with low low-pressure bypass system by middle pressure gas low voltage bypass communicating valve 9；Low voltage bypass is for heat regulating valve 10
Entrance is arranged on the pipeline between low voltage bypass valve 5 and low voltage bypass isolating valve 6, low voltage bypass for heat regulating valve 10 outlet with
Heat exchangers for district heating is connected.
Wherein, it boiler 11, superheater 18, high pressure cylinder 12, reheater 19, intermediate pressure cylinder 13, low pressure (LP) cylinder 14, condenser 16 and gives
Water pump 17 is in turn connected to form generating set Water, steam circulation circuit, and steam is driven by high pressure cylinder 12, intermediate pressure cylinder 13 and low pressure (LP) cylinder 14
Dynamic generator 15 forms generating set；1 entrance of high pressure turbine by filter is connect with main steam line, and high pressure turbine by filter 1 goes out
Mouth is connect with 2 entrance of high pressure bypass valve；The setting of high pressure turbine by isolating valve 3 high pressure bypass valve 2 and reheated steam cold segment pipe it
Between；4 entrance of low voltage bypass filter is connect with reheated steam hot arc pipeline, and outlet is isolated through low voltage bypass valve 5 and low voltage bypass
Valve 6 connects 16 entrance of condenser；The setting of 7 entrance of hp and lp bypass communicating valve high pressure bypass valve 2 and high pressure turbine by isolating valve 3 it
Between on pipeline, hp and lp bypass communicating valve 7 exports on the pipeline being arranged between low voltage bypass valve 5 and low voltage bypass isolating valve 6；
Low pressure (LP) cylinder isolating valve 8 is arranged on the gas-guide tube between intermediate pressure cylinder 13 and low pressure (LP) cylinder 14, and middle pressure gas low voltage bypass communicating valve 9 enters
Mouth pipeline is arranged on 13 discharge duct of intermediate pressure cylinder, and middle 9 outlet conduit of pressure gas low voltage bypass communicating valve is arranged in low voltage bypass
On pipeline between valve 5 and low voltage bypass isolating valve 6.
As shown in Fig. 2, high pressure turbine by filter 1 and low voltage bypass filter 4 include separator 20, it is arranged in separator
The outlet 22 in 20 center of top of separator is arranged in the inlet tube 21 of 20 sides, is arranged inlet tube inside separator 20
The strainer 23 that 21 access and the access of outlet 22 separate；Inlet tube 21 is filter inlet, and outlet 22 goes out for filter
Mouthful.
Wherein, 20 cylindrical setting of separator, bottom are provided with cone bucket, and strainer 23 is cylindrical to be coaxially fixed on separation
Be provided with backplate 28 outside the top of device 20, with the side of 21 face of inlet tube, 23 bottom lock of strainer and with 20 bottom of separator
Portion's cone bucket is in gap setting, and to form two chambers being relatively isolated, oxide skin is discharged from exterior chamber.
As shown in figure 3, the setting of inlet tube 21 of separator 20 is in center of top, outlet 22 is arranged in side；Strainer 23
Bottom opening and it is connect setting with 20 bottom cone bucket of separator, to form two chambers being relatively isolated, oxide skin is from inside
Chamber is discharged.
Oxidized skin discharges primary door 24 successively and the oxide skin discharge connection of secondary door 25 is cylindrical in shape for the bottom of separator 20
Oxide skin collector 26.The hydrophobic filter 27 that the inside of oxide skin collector 26 is coaxially disposed, in this preferred embodiment, hydrophobic mistake
Filter 27 is coaxially fixed on the bottom of oxide skin collector 26, the hydrophobic filter of the bottom center setting of oxide skin collector 26
27 output end connects hydrophobic development unit 29；As shown in Figure 1, the steam (vapor) outlet of hydrophobic development unit 29 is connected to low voltage bypass valve 5
On pipeline between low voltage bypass isolating valve 6, hydrophobic outlet is connected to condenser 16.
A kind of adjusting method of generating set depth peak regulation three-level series-parallel connection bypath system of the present invention, including walk as follows
Suddenly,
S1, setting high pressure turbine by, low voltage bypass and low low voltage bypass；
S2 is respectively communicated with high pressure turbine by and low voltage bypass, low voltage bypass and low low voltage bypass；
S3, when unit depth peak regulation, adjustment high pressure turbine by, low voltage bypass, low low pressure bypass valve arrangement and hp and lp bypass
Communicating valve, middle pressure gas low voltage bypass are connected to valve opening, and depth reduces steam-turbine amount, reduce steam turbine output and generator
Generation load improves heat capacity.
Further, when oxide skin detaches in superheater 18 in operation, high pressure turbine by isolating valve 3, low voltage bypass valve are closed
5, middle pressure gas low voltage bypass communicating valve 9 and low voltage bypass are for heat regulating valve 10；Open high pressure turbine by filter 1, low voltage bypass
Isolating valve 6；Adjust high pressure bypass valve 2, hp and lp bypass communicating valve 7；Make in superheater 18 oxide skin through superheated steam carry to
High pressure turbine by filter 1 detaches.
Further, when oxide skin detaches in reheater 19 in operation, high pressure bypass valve 2, high pressure turbine by isolating valve are closed
3, hp and lp bypass communicating valve 7, middle pressure gas low voltage bypass communicating valve 9 and low voltage bypass are for heat regulating valve 10；It opens by low pressure
Pipe filter 4, low voltage bypass isolating valve 6；Adjust 5 aperture of low voltage bypass valve；The reheated steam of oxide skin in reheater 19 is set to take
Band to low voltage bypass filter 4 detaches.
Embodiment 1：
By taking certain 600MW thermal power plant unit as an example, existing two-stage tandem is bypassed and carries out three-level mixing bypass transformation.When startup,
Hp and lp bypass communicating valve 7, middle pressure gas low voltage bypass communicating valve 9 and low voltage bypass are closed for heat regulating valve 10；Open high pressure
Bypass strainer 1, high pressure turbine by isolating valve 3, low voltage bypass filter 4 and low voltage bypass isolating valve 6；It is bypassed according to two-stage tandem
System normally starts, grid-connected and on-load.
When depth peak regulation, opens hp and lp bypass communicating valve 7, middle pressure gas low voltage bypass communicating valve 9 and low voltage bypass and supply
Heat regulating valve 10；Close high pressure turbine by isolating valve 3, low voltage bypass isolating valve 6；Adjust high pressure bypass valve 2, hp and lp bypass connection
Valve 7 reduces high pressure cylinder air inflow, reduces high pressure cylinder and contributes；5 aperture of low voltage bypass valve is adjusted simultaneously, reduces intermediate pressure cylinder air inflow,
Reduce intermediate pressure cylinder to contribute；8 aperture of low pressure (LP) cylinder isolating valve is adjusted simultaneously, maintains low pressure (LP) cylinder minimum air inflow, pressure gas is low in adjusting
It presses bypass valve 9, low voltage bypass for heat regulating valve 10, increases heating demand.
In the above process, due to changing the air inflow of the high, normal, basic cylinder of steam turbine, each grading vapour is caused to change, it should school again
Core axial thrust, it is ensured that sound strength of parts at different levels are no more than design value no more than differential expansion after design value, steam extraction and axial displacement.
Existing two-stage tandem is bypassed after carrying out three-level mixing bypass transformation, thermoelectricity unit increases the tune of 20% rated capacity
Peak energy power, minimum technology output reach 40%-50% rated capacities；Pure condensate unit increases the peak regulation of 15%-20% rated capacities
Ability, minimum technology output reach 30%-35% rated capacities.
Embodiment 2：
By taking certain 600MW thermal power plant unit as an example, existing two-stage tandem is bypassed and carries out three-level mixing bypass transformation.
When in operation as found to have oxide skin to fall off in superheater, the oxide skin separation of superheater in operation may be used：
High pressure turbine by isolating valve 3, low voltage bypass valve 5, middle pressure gas low voltage bypass communicating valve 9 and low voltage bypass are closed for heat regulating valve
10；Open high pressure turbine by filter 1, low voltage bypass isolating valve 6；Adjust high pressure bypass valve 2, hp and lp bypass communicating valve 7；Made
Oxide skin is carried to high pressure bypass strainer 1 through superheated steam and is detached in hot device, the Steam Recovery after separation to condenser 12；Point
High pressure turbine by filter 1, low voltage bypass isolating valve 6, high pressure bypass valve 2 and hp and lp bypass communicating valve 7 are closed from after.
When in operation as found to have oxide skin to fall off in reheater, the oxide skin separation of reheater in operation may be used：
Close high pressure bypass valve 2, high pressure turbine by isolating valve 3, hp and lp bypass communicating valve 7, middle pressure gas low voltage bypass communicating valve 9 and low
Pressure bypass is for heat regulating valve 10；Open low voltage bypass filter 4, low voltage bypass isolating valve 6；Adjust 5 aperture of low voltage bypass valve；Make
The reheated steam of oxide skin is carried to low voltage bypass filter 4 and is detached in reheater, the Steam Recovery after separation to condenser 12；
Low voltage bypass filter 4,5 aperture of low voltage bypass isolating valve 6 and low voltage bypass valve are closed after separation.
Those skilled in the art will readily occur to other embodiment party of the present invention after considering the disclosure of specification and practice
Case.This application is intended to cover any variations, uses, or adaptations of the present invention, these modifications, purposes or adaptability
Variation follows this general principle and includes the undocumented common knowledge or conventional techniques hand in the art of the disclosure
Section.The description and examples are only to be considered as illustrative, and the true scope and spirit of the application are pointed out by claim.
It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present disclosure is only limited by the accompanying claims.
Claims (10)
1. a kind of generating set three-level series-parallel connection bypath system, which is characterized in that including hp by-pass system, low-pressure bypass system and
Low low-pressure bypass system；
The hp by-pass system includes by the high pressure being connected in turn between main steam line and reheated steam cold segment pipe
Pipe filter (1), high pressure bypass valve (2) and high pressure turbine by isolating valve (3)；
The low-pressure bypass system includes being connected in turn by the low pressure between reheated steam hot arc pipeline and condenser (16)
Pipe filter (4), low voltage bypass valve (5) and low voltage bypass isolating valve (6)；
The low low-pressure bypass system includes low pressure (LP) cylinder isolating valve (8) and middle pressure gas low voltage bypass communicating valve (9)；Low pressure (LP) cylinder
On the gas-guide tube that isolating valve (8) is arranged between intermediate pressure cylinder (13) and low pressure (LP) cylinder (14)；Middle pressure gas low voltage bypass communicating valve (9)
Inlet duct is arranged on intermediate pressure cylinder (13) discharge duct, and outlet conduit setting is isolated in low voltage bypass valve (5) with low voltage bypass
On pipeline between valve (6)；
The hp by-pass system is connected with low-pressure bypass system by hp and lp bypass communicating valve (7), low voltage bypass valve
(5) pipeline between the low voltage bypass isolating valve (6) is connected for heat regulating valve (10) with heat exchangers for district heating through low voltage bypass.
2. a kind of generating set three-level series-parallel connection bypath system according to claim 1, which is characterized in that by the high pressure
Pipe filter (1) entrance is connect with main steam line, and high pressure turbine by filter (1) outlet is connect with high pressure bypass valve (2) entrance.
3. a kind of generating set three-level series-parallel connection bypath system according to claim 1, which is characterized in that by the low pressure
Pipe filter (4) entrance is connect with reheated steam hot arc pipeline, and low voltage bypass filter (4) outlet enters with low voltage bypass valve (5)
Mouth connection.
4. a kind of generating set three-level series-parallel connection bypath system according to claim 1, which is characterized in that the high-low pressure
Bypass valve (7) entrance is arranged between high pressure bypass valve (2) and high pressure turbine by isolating valve (3) on pipeline, and outlet setting exists
On pipeline between low voltage bypass valve (5) and low voltage bypass isolating valve (6).
5. a kind of generating set three-level series-parallel connection bypath system according to claim 1, which is characterized in that high pressure turbine by filters
Device (1) and low voltage bypass filter (4) include separator (20), and the import in separator (20) side or center of top is arranged
It manages (21), the outlet (22) in separator (20) center of top or side is set, setting is internal by import in separator (20)
The strainer (23) that the access of the access and outlet (22) of managing (21) separates；Inlet tube (21) is filter inlet, outlet
(22) it is filter outlet.
6. a kind of generating set three-level series-parallel connection bypath system according to claim 5, which is characterized in that separator (20) is in
Cylindrical shape setting, bottom is provided with cone bucket, the cylindrical top for being fixed on separator (20) of strainer (23)；
Inlet tube (21) is arranged at separator (20) side, and backplate (28) is provided with outside the side of strainer (23) face, filters
Net (23) bottom lock and with separator (20) bottom cone bucket be in gap setting；
Inlet tube (21) be arranged in separator (20) center of top, strainer (23) bottom opening and with separator (20) bottom bore
Bucket connection setting.
7. a kind of generating set three-level series-parallel connection bypath system according to claim 5, which is characterized in that separator (20)
Oxidized skin discharges primary door (24) successively and oxide skin discharge secondary door (25) connects tubular oxide skin collector for bottom
(26)。
8. a kind of generating set three-level series-parallel connection bypath system according to claim 7, which is characterized in that oxide skin collector
(26) the internal hydrophobic filter (27) being arranged, the output end connection hydrophobic development unit (29) of hydrophobic filter (27)；Hydrophobic expansion
The steam (vapor) outlet of container (29) is connected on the pipeline between low voltage bypass valve (5) and low voltage bypass isolating valve (6), hydrophobic outlet
It is connected to condenser (16).
9. a kind of generating set three-level series-parallel connection bypath system adjusting method, which is characterized in that including：
When generating set starts, close by hp and lp bypass communicating valve (7), middle pressure gas low voltage bypass communicating valve (9) and low pressure
Road is for heat regulating valve (10)；Open high pressure turbine by filter (1), high pressure bypass valve (2), high pressure turbine by isolating valve (3), by low pressure
Pipe filter (4), low voltage bypass valve (5) and low voltage bypass isolating valve (6)；Normally start according to two-stage tandem bypath system, simultaneously
Net and on-load；
When heat supply depth peak regulation, open by hp and lp bypass communicating valve (7), middle pressure gas low voltage bypass communicating valve (9) and low pressure
Road is for heat regulating valve (10)；Close high pressure turbine by isolating valve (3) and low voltage bypass isolating valve (6)；Adjust high pressure bypass valve (2) and
Hp and lp bypass communicating valve (7) reduces high pressure cylinder air inflow, reduces high pressure cylinder and contributes；Simultaneously low voltage bypass valve (5) is adjusted to open
Degree reduces intermediate pressure cylinder air inflow, reduces intermediate pressure cylinder and contributes；Low pressure (LP) cylinder isolating valve (8) aperture is adjusted simultaneously, maintains low pressure (LP) cylinder minimum
Air inflow, pressure gas low voltage bypass communicating valve (9) and low voltage bypass increase heating demand for heat regulating valve (10) in adjusting.
10. a kind of generating set three-level series-parallel connection bypath system adjusting method according to claim 9, which is characterized in that packet
It includes：
When oxide skin detaches in superheater (18) in operation, high pressure turbine by isolating valve (3), low voltage bypass valve (5), middle pressure are closed
Gas low voltage bypass communicating valve (9) and low voltage bypass are for heat regulating valve (10)；It opens high pressure turbine by filter (1), adjust by high pressure
Road valve (2), low voltage bypass isolating valve (6) and hp and lp bypass communicating valve (7)；Make in superheater (18) oxide skin through superheated steam
It carries to high pressure bypass strainer (1) and detaches；
When oxide skin detaches in reheater (19) in operation, high pressure bypass valve (2), high pressure turbine by isolating valve (3), high-low pressure are closed
Bypass valve (7), middle pressure gas low voltage bypass communicating valve (9) and low voltage bypass are for heat regulating valve (10)；Open low voltage bypass
Filter (4) and low voltage bypass isolating valve (6) adjust low voltage bypass valve (5) aperture, keep oxide skin in reheater (19) reheated
Steam is carried to low voltage bypass filter (4) and is detached.
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| CN201810201946.2A CN108301882B (en) | 2018-03-12 | 2018-03-12 | Three-stage series-parallel bypass system of generator set and adjusting method thereof |
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| CN108301882B CN108301882B (en) | 2024-03-05 |
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